*This battery reconditioning program exceeded my presumptions. It worked on any drill battery, several AA and AAA batteries, **batery.repair** and any camera battery. The steps are simple and the act itself is exciting to do. No matter what type of battery you`ve got, it is sure to function again!*
Mike... great video. I was Googling for info on my Go Motorboard, and came upon your video. Your video reminds me of myself many years ago (mid 70s) when I built my first electric go-cart for the kids in the neighborhood. RUclips is certainly one of the best outgrowths from our new-age of technologies. And your spirit comes through in this video. I'm going to subscribe. Thanks for taking the time to share.
Thank you. You inspired me to build my own battery 26p 14s and it rocks! 100+ mile range and i cannot thank you enough. All old new stock 2004 lenovo battery packs with panasonic cells!
@@MikeAndLaurenTV hi what discharge amp is a laptop cell 2200mah 3.7v I have built a pack 14s and 10p was wondering what the continuous amps would be ?
Greetings Mike ( and Lauren ). I really appreciate you taking the time and effort to make this video. You inspired me and gave me the confidence to attempt my own electric bike conversion.Thank you for presenting this information in a friendly manner and free of patronisation and ego. I'm learning as I go, making mistakes, not fully understanding all the terms, yet I know one day soon it'll all make sense.Multimeter bought, old laptop batteries dissasembled, imax b6ac ordered. Soldering iron next on the list. Peace out.
Great job on the project and on the video. I could see the pure joy on your face and hear it in your voice when you took it for a test spin. Even while getting ready to do so, you could barely contain your excitement. It sure feels good to make progress on a project, doesn't it?
I've been wanting to do this for a while now. The links you've provided will definitely get me out there and make an eBike as well. I've been watching laptop battery prices on eBay for a while now and I'm just waiting for a good time to snatch a batch of them. Thanks for all the info! I look forward to making one as well.
Nice work on the packs. I recommend using network plugs ( cat5 ) for your balance leads as that white balance plug gets worn out very quickly. Running 3 x 20v 30 amps on a 48v 1000w rear hub.
A very good source of 18650s is a guy on eBay called alarmhookup. you can get new brand name cells for about $1.50 in 36v 10s2p packs. Each cell has at least 2.2ah and is rated for high current. I believe they were originally made for those self balancing "hoverboards" but when that fad went out of style there was a lot of surplus batteries
Good one ,,I have a plan of buying the kit and getting 48 volt motor etc,, was gonna use 4 motor cycle battery's ,,,about 160 uk pounds for the battery's not sure what the range will be thanks Shane uk
Isn't better to add balance cable leads to the last battery in the pack not the first? It seems that all the time first battery on every pack is going to dry out first and charge first. Or is it better to add balance leads to every battery with same cable length and then connect them all to balanced cable?.What is better solution? Thanks :)
Killer project! I had one of those 2-stroke bicycle kits about a year ago -- it was so much fun, but someone stole it, so I've been looking for a new project for awhile now. I was going to build a new 2-stroke, but I think you might have inspired me to go green! :-)
I didn't notice any discharge protection. Li-ions get damaged if they're discharged below 2.5V. Usually you'd put in a circuit that disconnects them from the load when they discharge to about 2.5V.
Hi Mike I have a question about balance charging. I don't understand how you are going to benefit from using a balance charger if the batteries are already connected in series and parallel. Wouldn't you need to disconnect the series connections before connecting the balance charger so you have isolation of each bank?
A bit of background before going into why balance charging is needed. Manufacturing is never perfect, the same batch of batteries coming off the same assembly line has different properties (max charge voltage, capacity, internal resistances, rate of discharge, etc etc.) This means that as you are using the batteries, the batteries will become out of balance for those that are in series. Those that are connected in parallel will maintain the same charge(self balancing), and you can view 1 pack of parallel connected batteries as one big battery. In this video, the configuration is 6s 12P, but you can also look at it as just 6 different packs of batteries that are going out of balance. Without the balance charger, the packs of batteries that are in series will go out of balance, eventually causing more and more charge loss, lowers lifespan of the batteries, and losing the full capabilities of your batteries (imagine the first pack being charged to 4.2V, while the 6th pack is only 3.9V) basically, the balance charger looks at the every point of connection in series and figure out whether or not the battery is in balance (first pack have 3.7V, 2nd pack have 7.4V, 3rd pack have 11.1V, and so on). If the numbers don't match those values, it will redistribute the charge between the packs so that they maintain perfect balance
I understand Balance Charging and thank you for the reply. The Batteries in Parallel yes will get the same voltage. I am just thinking since every cell is different. One cell may act as a sink if they have lost some capacity. It's is most likely this will happen as the pack gets older and therefore may cause charging issues. On the other hand, I see it would be a nightmare to balance every cell individually. Therefore, I suppose the answer to my question is that compromises must be made in light of reducing complexity.
hi, so with a balance charger you will not need a BMS glued to the battery pack itself? But you can soder the balance wires to the battery pack and connect the other end to the balance charger. That's so cool, i hope i understood everything right... (im not that good at this stuff, but im learning.) I'm trying to make a 48v 20amp battery pack using laptop batteries i got from batteries and bulb store.
I loved this video! But I have got a lot of questions unanswered! 1. Can we change gears?(If yes, please do make a tutorial for that as well) 2. What happens when we apply sudden breaks without switching off the motor or do we have to always switch off the motor first and then apply breaks? 3. Does the battery get charged once we manually pedal the bike? If yes, Do the batteries get damaged if we overcharge them by pedalling? And how much do we have to pedal to get a full charge? 4. How did you connect the motor? 5. How long will this battery last? 6. (A problem) My batteries were of about3.6-.7 v! PLEASE MAKE THE PART II ASAP IN ORDER TO ANSWER THESE QUESTIONS!!! PLEASE!!
+Tsilent Geni0 there is a lot of ifs in the questions you asked, so i will pick what i think you meant. 1: if you have a rear hub motor, yes you can have gears too 2: most hub motor kits have special brake levers that deactivate the motor when braking 3: unless the hub has regen braking built in no, and it would just be better to regen downhill, not when pedaling 4: he hooked it up to the pos and neg of motor controller 5: it depends how many watts you are using, average is 20wh/mi at 12 mph 6: an 18650 is 3.6v nominal, full they are 4.2 volts. hope this helps.
I went for the opposite conversion... I made a 60 cell lenovo power pack for my laptop... too a 48v battery and devided it into 4 12v elements and equalized the voltage to my 9 cell lenovo and joined to the 9 cell with 4x plugs.
i want to make 36v 10ah battery for my bike i have a 36v 250w motor if you could guide me how can i connect the battery to the controller inside the bike do i have to solder the connector? thanks.
Best is to use plug and socket connections between battery-pack and controller, instead of a fixed connection. So that at anytime you can unplug and test or swap. Thus do not solder to a controller.
I ride a recumbent trike with a 48v 1000w 10ah system installed. I want to make myself a 20ah pack, but with all the videos here on batteries, I've yet to find the answer to the question of how to hook up a bms. Yes, I know about connecting the bms wiring to the pack; that's simple. But how do I ensure that to charge the pack, all I have to do is feed it power from the charger?... as in most commercial power chargers. I don't want to have to hook it up to an iMax balance port every time I charge it, because even if I didn't mind the trouble of doing so, the timing of the balance phase is also not explained anywhere. I've got WHY balance down; I just need some WHEN balance...
hi Mike thank you for reply...do you used power supply for you imax B6 or just adapter cable? and if i count you battery you discharge below 2Volt and 2ahm you battrery? am i rite? thank you
Demsy Rumampuk Depends on the model. I would get the Imax B6AC which has the power supply built in. I'm not sure what you mean about discharge. The imax has a discharge setting which drains the batteries and calculates the capacity.
Hello. I have a question. I have an 24V electric scooter and I want to change the 2S 12V Pb-Acid to a li-ion battery pack cells for improved range . My question is: Do I have to put 6S or 7S li-ion cells in a pack, to supply the 24V motor? Some chargers and BMS for 24V electric bike are labeled for 7S li-ion pack. For example, the 24V electric li-ion charger on the market (ebay) has an output voltage of 29.4V (4.2V x 7) and also the BMS for 24V it says 7S configuration. Some people make packs with 6S. I don't know what to choose between 6S and 7S. I don't want to fry my 24V motor. Please help me with an explanation. Thank you.
i found a tip from alibaba wrap finger tips in polyimide kapton tape to protect against shock when touching batteries. battery sparks can disintergrate volt metre probe tips so imagine damage to finger bones
Hi I have an error 8 message on my Chinese 1500 watt 48v ebikemotor kit any ideas why the motor will not switch on? There is no pas attachment. Only one white wire not attached to the motor to controller. Brakes not attached. Pas not attached. Sensor not attached. Thanks Robert
Hi I'm new to learning how to solder but plan on watching more videos on how to do it. Someone said nickel plated solder is not a good idea. And side from that, I'm trying to find out which soldering iron specs I need to look for in order to do this right. I'd like to stay within a 25$ range for the soldering iron if possible. I see ones online that are 60-100Watts for $17 but say nickel plated iron tips. I'm wondering if that's a bad thing. What wattage should I look for in order to do this job right? Ideally I'd like to start off with a battery pack just like this guy's setup. And then after seeing how that one performs, make a 2nd one to double the range. So please, any helpful guidance in finding a low cost soldering iron kit, without compromising any necessary quality would be highly appreciated. Thank you!
What is the motor from? Where can you get one? Also, does it have an individual sprocket that freewheels as well? Any modifications to mount it in the bicycle frame? Did you to the drop solder blob trick in order for not heating up and damaging the cells? I can't buy/make my own spot welder (trying to keep costs down). Thank you and greatly appreciate your reply!
I am curious on how many AH that would be if set up as 12v rather then 48 (can't remember if that is what you set it up as). I am wondering as I am trying to replace my current setup that is 12v 95AH. I am assuming higher volt makes lower AH but still has the same amount of energy. just different configuration. any help figuring this out would be nice
Hey man like you video, I would like to know how you can discharge 24 pack of battery with the imax charger cos I know the discharge can only be 1cell at a time on imax
I used 7 blocks of 12 18650 recycled cells to power a 24v Homelite push lawn mower. It works fantastic and can mow my lawn for about 2hrs each mowing takes a bit less than 1hr. The lead acid batteries in it were week so I got it for nothing. I bought a box of good (2.5Ah) Panasonic cells for about $1.50, a much better way to get cells than cracking laptop battery boxes and then about half the cells are bad or week, and it's a lot of work. You simply must check out Jehu Garcia's VW bus powered by blocks of these things.
Can you please provide a link to where you bought the battery holders? I have issues finding them in Germany. On eBay I can only find some shipped from Australia.
you mentioned grouping batteries of similar capacity together to make each "cell" and show how the crappier batteries will need more of them to make the same capacity, but your finished pack has an equal amount of batteries in all 6 cells. How did that happen? Could that be a reason for the weakness of the range of the batteries?
Hey Mike, Here's a thought I had, when you consider making your next battery box you might want to consider this, design it to make the batteries removable. Those plastic clips look like they worked like a champ and if you can run copper for a busbar maybe you can attach the plastic clips to the wood with the busbar pinched between the wood and plastic, then you will have a top and bottom that will come apart without the need to solder. It sounds good in my head when I first thought of it, but now I I ponder a bit the logistics does not seem to add up; but think about it, maybe you can come up with a working solution. I don't solder well, small connections that is, I'm a wiz with plumbing but tiny connections is NOT ME. Oh, getting back to the battery box, you may want to use threaded rod in 4 spots throughout the middle to provide support and to structure. A nut on both sides would secure the threaded rod to the box bottom and then a nut and washer at the top can be used as a leveling system for the over all cover. I don't have the ability to "DO" as I once did due to old age and past injuries but my mind still has some ideas; some of them useful... LOL... Something else you may want to consider is making a battery locking system so that you won't have to take the laptop batteries apart in the first place, just lock it into a cover system. If one needs charged, or replaced, it's easily done. Great use of low priced items...
Paul Bialozor Great ideas. I would be a little concerned about making contact with all 72 batteries all at once. If even one cell slipped down or something, the whole pack voltage would be off. But I do like the idea of quick replacement and repair if needed.
Mike and Lauren Yeah, the more I thought about it the less sense it seemed to make, but the idea is plausible if you can work out the mechanics... LOL... Do you think that is a way to make an external connection for the battery pack itself? That way all you would need to do is replace each 10 dollar Laptop Battery as it went back...
each group of paral·lel batteries has protection circuit usin BMS. BSM consideres as one battery all the parallel group. of course, if you have not paral·lel group, you have a protection for each battery, but finally, you have a small capacity battery. Remember, paral·lel groups becomes in a capacity summatory, series groups, voltatge summatory.See BMS schematics and will see how it Works.
Good work...I am redoing my 92 volt pack and instead of using nickle strip using the copper that you did as I had a problem with huge resistance on mine. The little 50 watt charger WILL NOT be able to charge that pack..lol..maybe in 2 weeks... ;) Im wondering because you are using thick copper instead of very thin nickle sheet, what kind of sag do you get?..do you have a watt meter to measure this?... You havent attached any balance wires...how are you going to balance the pack?
iwantitpaintedblack You don't. You try and balance the groups of 12 by combining "like" capacities together. Mine were actually off a bit, so I needed to add a couple cells after the video.
hey Mike i bougth Battery Laptop HP New 74 cell inside and all i test 3.7 volt and 1700 mah do i need to charge and discharge the battery before to install the bike thank you Mike
it's print on the lebel battery 1700 maH.how do you test the maH? what the purpose of the charge and discharge the battery? thank you Mike i start the project basic on your video
Demsy Rumampuk You test the maH with the iMax B6. It's not completely necessary, but it helps you know for sure what the capacity will be. If it's a used battery, it definitely have as much capacity as advertised.
Thank you Mike now i understand how the battery is and build battery pack,i still wait my battery hold bracket from china soon i finish i post the link my video to you thank you so much it help me understand the battery work good job
How did you organize the batteries? For each cells in one block, do they have to match capacity? And for each block, do they have to match capacity too? I'm bulding 48v pack, 13s10p but I'm still confuse how to organize them.
Very impressive work and an enjoyable video. What are the chances that the old laptop cells you get are so old they are left with only a few cycles? Is it worth the $100? You mentioned buying even DEAD laptop cells from ebay for this. How can Dead cells be usable if they are really dead? You mean they look dead but are not dead , right?
Hi, I'm a few months behind you and I've stop my project because of the spot welding issue. So my question is : How did the soldering affect the cells? Were you able to measure it?
+Mike and Lauren Can you tell me what pulse length you used, and the voltage output of your spot welder? If you lessened the pulse length, or lowered the voltage, could it have been more successful? Thank you
+EFA22000 I soldered mine, no problem whatsoever. I even used buss bars of thick copper and a 450C iron temp. Some I even used two irons together to get the thermal mass! These guys are just scared for no reason. Be as quick as you can, but even if you aren't you should be fine.
What a nice job. I hope it still runs very well! :D I'm currently in the making of a similar project. What gauge wire did you use for the battery, and is there any reason you didn't go for nickel strip welding instead of solid copper wire? Thanks
Simple questions. I'm just starting out learning alot of this stuff but I'm still a little confused about one thing. Each battery holds about 3.7v and my motor is 24v so wouldn't I need somewhere around 7 ion batteries to build a 24v battery. I see in the video you have much more than obviously so either your system needs more power or is it that you can use more 18650s and make it distribute 24 for a longer period of time. Again it's a pretty novice question but we were all novice once.
I will have my electrical bike with me in my van, in which I don't have access to 230 V and don't like the idea of going through an inverter. Are there any good charging solutions directly from 12 V?
Hello Mike, great video ! About the battery spacers, are they good and sturdy ? I always try to get reviews for mechanical parts I find on eBay, especially if they come from China, would you recommend using these ?
Jeremy Dahan Once together they are very solid. But the spacers themselves are kind of weak. I made a mistake and had to switch some batteries around and two of the spacers broke in half.
hey Mike great video i try to make battrey for my ebike using your video..i have ebike motor 48 volt 1000 watt. if i build 48 volt battrey should be i double the battrey or there other way to make ? if you just 24 volt need cell 72 battrey if i make 48 volt should be 144 battrey? and how i conect the 12 block battrey to balance the charge ?thank you mike
Demsy Rumampuk You would make 2 of these battery packs, and charge them separately. When you hook up to the bike, wire the two 24V packs in series to get your 48 volts. I'll be doing the same thing here in a few months!
Hello, Was wondering who else does ithis after Rinoa.:))) great work. So, if 4.1v is the full charge for 3.7v cell, then for the 24 volts battery pack to be fully charged the voltage should reach 28 volts right?
DMAN22yeah Hello, thank you:) Actually what I was asking - If 3.7v cell, when full charged = 4.2v(charging cut off). Then, 7 in series 24v, when full charged = how much cut off limit voltage?
Kketansa Art you need to have a balance charger, so use a 7s balance charger. 3.7v on a cell open circut is fairly low charge. 4.2v is full charge. a 7s battery will give 29.4v, which will give you extra power and less voltage drop
phoah that welder. dude, get a super capacitor to do the welding so at least its discharge itself through and eventually stop. having a switch which is constant until you stop is a no no in my eyes. hopefully others can try use this method instead and use a couple of farad caps or something. even if you had put some limiter to stop after X amps for X time would be good.
I like your neat workshop and the way you tools are organized. Just a few comments. You can still use your spot welder for battery tab spot welding. Go to Ebay and buy a timer circuit like this one: Search: DC 12V DC Multifunction Self-lock Relay PLC Cycle Timer Module Delay Time Switch It will allow you to set on time down to 0.1seconds. Therefore you will not burn through. I am glad to hear you are going to put on balance charging. Good video and nice job on the batteries.
+Mike and Lauren I built my own Spot Welder from a Microwave Oven and using the timer will prevent the problem you were having. You should try it on some test pieces to discover the correct on time.
Hi can anyone help I have brought a 1000w e-bike motor 48v. I have came to the battery side and copped it from RUclips. unfortunately after 10 mins my imax b6 comes up with err so after trying a number of things I ended up buying a new I max b6 which come up with the same err any advice please
+danz409 from the description: UPDATE: The battery had a total capacity of 19aH. The groups of cells were slightly out of balance (3.3v, 2.5v, 2.9v, 2.5v, 3.1v, 2.9v) so I could rearrange some cells and get a few extra miles, but I'm happy enough with the results.
Hi , I need some help . I start my project today and the first cell I removed from laptop batterys charged to 1600 to 2500 , but when I discharge than I get 300 mha . I used the same charge rate 1 Amp . What am I doing wrong ?
Hi.. I have a question. if i wanna make a 48v battery pack i have to make the same process but with the twice of batteries or i can make 2 of this en put it in series and get the 48v.
+Johniel mancebo cordero yes thats what rinoa super genius did but you should use 13s instead of 12s because it will give more range and power even at a lower charge percentage
Thanks Bro. ...... this is exactly Wat I needed... I'm building a 24v ebike.... just got my 18650 dead laptop batteries and I'm doing the test now to check the capacity... how to stay in touch... God bless u..
![Blox Fruits Dragon Rework Update [Full Stream]](http://i.ytimg.com/vi/EqDAp8udhm0/mqdefault.jpg)
*This battery reconditioning program exceeded my presumptions. It worked on any drill battery, several AA and AAA batteries, **batery.repair** and any camera battery. The steps are simple and the act itself is exciting to do. No matter what type of battery you`ve got, it is sure to function again!*
the act itself is exciting to do lmao
Mike... great video. I was Googling for info on my Go Motorboard, and came upon your video. Your video reminds me of myself many years ago (mid 70s) when I built my first electric go-cart for the kids in the neighborhood. RUclips is certainly one of the best outgrowths from our new-age of technologies. And your spirit comes through in this video. I'm going to subscribe. Thanks for taking the time to share.
Thank you. You inspired me to build my own battery 26p 14s and it rocks! 100+ mile range and i cannot thank you enough. All old new stock 2004 lenovo battery packs with panasonic cells!
susan susansmith That's amazing, thanks for sharing!
susan susansmith 100 mile range that's insane @@
@@MikeAndLaurenTV brother please tell me the connection of the 7 pins it would be a great help love from India you can reach me at 9855107070
@@MikeAndLaurenTV hi what discharge amp is a laptop cell 2200mah 3.7v I have built a pack 14s and 10p was wondering what the continuous amps would be ?
Greetings Mike ( and Lauren ).
I really appreciate you taking the time and effort to make this video. You inspired me and gave me the confidence to attempt my own electric bike conversion.Thank you for presenting this information in a friendly manner and free of patronisation and ego.
I'm learning as I go, making mistakes, not fully understanding all the terms, yet I know one day soon it'll all make sense.Multimeter bought, old laptop batteries dissasembled, imax b6ac ordered. Soldering iron next on the list.
Peace out.
+jim smith Awesome! Good luck.
+jim smith watch all of rinoa super genius ebike vids. they will help greatly.
Great job on the project and on the video. I could see the pure joy on your face and hear it in your voice when you took it for a test spin. Even while getting ready to do so, you could barely contain your excitement. It sure feels good to make progress on a project, doesn't it?
Gene Jordan Oh man, it's been on the back of my mind for months. It feels so good to have it working!
I'm inspired! Now I just need the budget for it!
YES! I love the joy in your voice @ 7:46. Thumbs up.
Kevin R. That was a pretty great moment. I love getting first tests caught on camera.
That was one of the nicest built batteries I've seen. Great work!
Bulete Aurelian Thanks. Those battery clips did all the work. $8 dollars well spent :)
I've been wanting to do this for a while now. The links you've provided will definitely get me out there and make an eBike as well. I've been watching laptop battery prices on eBay for a while now and I'm just waiting for a good time to snatch a batch of them. Thanks for all the info! I look forward to making one as well.
Nice little project, I actually find that 7s works better for 24v as nominal voltage of a 6s battery is only 22.2v
i think he used 6s because the imax b6 cant charge above 6s
Congrats on turning a turd into gold! Love how you explain this and how you designed this. I'm building a pack soon and will use this wiring design.
Very cool project
jehugarcia Thanks!
are not they with 3.7v????
they are 4.2v?
3.7v nominal
4.2v 100% SOC
thank you
an what about their amps , these batteries might be about 1c or 1.5c .
Nice work on the packs. I recommend using network plugs ( cat5 ) for your balance leads as that white balance plug gets worn out very quickly.
Running 3 x 20v 30 amps on a 48v 1000w rear hub.
Tobias Cooper Great tip. Thanks.
You did a better job of explaining the balance charging. Thanks for the video....I needed it.
Jerry Reed Thanks, glad to help!
Awesome build Mike!
A very good source of 18650s is a guy on eBay called alarmhookup. you can get new brand name cells for about $1.50 in 36v 10s2p packs. Each cell has at least 2.2ah and is rated for high current.
I believe they were originally made for those self balancing "hoverboards" but when that fad went out of style there was a lot of surplus batteries
That's a lot of work time and effort! Fun to watch, though I'm no way attempting that!
Good one ,,I have a plan of buying the kit and getting 48 volt motor etc,, was gonna use 4 motor cycle battery's ,,,about 160 uk pounds for the battery's not sure what the range will be thanks Shane uk
Isn't better to add balance cable leads to the last battery in the pack not the first? It seems that all the time first battery on every pack is going to dry out first and charge first. Or is it better to add balance leads to every battery with same cable length and then connect them all to balanced cable?.What is better solution? Thanks :)
Killer project! I had one of those 2-stroke bicycle kits about a year ago -- it was so much fun, but someone stole it, so I've been looking for a new project for awhile now. I was going to build a new 2-stroke, but I think you might have inspired me to go green! :-)
Paul Rallo Awesome! This was a really fun DIY. Go for it!
I didn't notice any discharge protection. Li-ions get damaged if they're discharged below 2.5V. Usually you'd put in a circuit that disconnects them from the load when they discharge to about 2.5V.
Hi Mike I have a question about balance charging. I don't understand how you are going to benefit from using a balance charger if the batteries are already connected in series and parallel. Wouldn't you need to disconnect the series connections before connecting the balance charger so you have isolation of each bank?
A bit of background before going into why balance charging is needed.
Manufacturing is never perfect, the same batch of batteries coming off the same assembly line has different properties (max charge voltage, capacity, internal resistances, rate of discharge, etc etc.)
This means that as you are using the batteries, the batteries will become out of balance for those that are in series. Those that are connected in parallel will maintain the same charge(self balancing), and you can view 1 pack of parallel connected batteries as one big battery.
In this video, the configuration is 6s 12P, but you can also look at it as just 6 different packs of batteries that are going out of balance.
Without the balance charger, the packs of batteries that are in series will go out of balance, eventually causing more and more charge loss, lowers lifespan of the batteries, and losing the full capabilities of your batteries (imagine the first pack being charged to 4.2V, while the 6th pack is only 3.9V)
basically, the balance charger looks at the every point of connection in series and figure out whether or not the battery is in balance (first pack have 3.7V, 2nd pack have 7.4V, 3rd pack have 11.1V, and so on). If the numbers don't match those values, it will redistribute the charge between the packs so that they maintain perfect balance
I understand Balance Charging and thank you for the reply. The Batteries in Parallel yes will get the same voltage. I am just thinking since every cell is different. One cell may act as a sink if they have lost some capacity. It's is most likely this will happen as the pack gets older and therefore may cause charging issues. On the other hand, I see it would be a nightmare to balance every cell individually. Therefore, I suppose the answer to my question is that compromises must be made in light of reducing complexity.
You can easily setup an arduino with a solenoid to cut the on time of that welder down so it wouldnt blow holes in the cells.
hi, so with a balance charger you will not need a BMS glued to the battery pack itself?
But you can soder the balance wires to the battery pack and connect the other end to the balance charger.
That's so cool, i hope i understood everything right... (im not that good at this stuff, but im learning.)
I'm trying to make a 48v 20amp battery pack using laptop batteries i got from batteries and bulb store.
I make a 24v 15ah battery pack.The best 18650
(....) mah and how many batteries are needed? Please say if any kind of BMS will take place
Nice job. You are so right the batteries off of Ebay are very unreliable. Thanks for the info.
Bill Mader You're welcome. From what I've read they actually just take dead cells and wrap them in new plastic. It's pathetic.
Thank you for this video!!!
I was wondering as to what settings the iMax was set to for charging?
That's a mad science video if ever there was one. Hopefully you get some good use out of bike version 0.1.
I loved this video! But I have got a lot of questions unanswered!
1. Can we change gears?(If yes, please do make a tutorial for that as well)
2. What happens when we apply sudden breaks without switching off the motor or do we have to always switch off the motor first and then apply breaks?
3. Does the battery get charged once we manually pedal the bike? If yes, Do the batteries get damaged if we overcharge them by pedalling? And how much do we have to pedal to get a full charge?
4. How did you connect the motor?
5. How long will this battery last?
6. (A problem) My batteries were of about3.6-.7 v!
PLEASE MAKE THE PART II ASAP IN ORDER TO ANSWER THESE QUESTIONS!!! PLEASE!!
+Tsilent Geni0 there is a lot of ifs in the questions you asked, so i will pick what i think you meant.
1: if you have a rear hub motor, yes you can have gears too
2: most hub motor kits have special brake levers that deactivate the motor when braking
3: unless the hub has regen braking built in no, and it would just be better to regen downhill, not when pedaling
4: he hooked it up to the pos and neg of motor controller
5: it depends how many watts you are using, average is 20wh/mi at 12 mph
6: an 18650 is 3.6v nominal, full they are 4.2 volts.
hope this helps.
I went for the opposite conversion... I made a 60 cell lenovo power pack for my laptop... too a 48v battery and devided it into 4 12v elements and equalized the voltage to my 9 cell lenovo and joined to the 9 cell with 4x plugs.
have you ever considered using a variac to slightly lower the power of your spot welder so it wont melt holes in the batteries?
So the ground wire and all the others go on the negative terminals with the last going positive? Just want to quadruple check.
i want to make 36v 10ah battery for my bike
i have a 36v 250w motor if you could guide me how
can i connect the battery to the controller inside the bike
do i have to solder the connector? thanks.
Best is to use plug and socket connections between battery-pack and controller, instead of a fixed connection. So that at anytime you can unplug and test or swap. Thus do not solder to a controller.
Great video! I appreciate your professionalism. You mention the electric motor being 24V, but how many watts is the electric motor?
+Steve Auguste Mine is 450 watts, but I'd like to upgrade to the 1000W motor.
I ride a recumbent trike with a 48v 1000w 10ah system installed. I want to make myself a 20ah pack, but with all the videos here on batteries, I've yet to find the answer to the question of how to hook up a bms.
Yes, I know about connecting the bms wiring to the pack; that's simple. But how do I ensure that to charge the pack, all I have to do is feed it power from the charger?... as in most commercial power chargers. I don't want to have to hook it up to an iMax balance port every time I charge it, because even if I didn't mind the trouble of doing so, the timing of the balance phase is also not explained anywhere.
I've got WHY balance down; I just need some WHEN balance...
+dan mortenson Balance your cells with the iMax before you make the pack, and after let the BMS do the work!
Can you add a BMS to the battery so you don't discharge below the nominal voltage?
You talk about grouping cells and arrangement. In the update, you mention they are off balance. What does this mean ?
Does it matter which points on the battery you have the extended bits of wire to connect to the bike?
hi Mike thank you for reply...do you used power supply for you imax B6 or just adapter cable? and if i count you battery you discharge below 2Volt and 2ahm you battrery? am i rite? thank you
Demsy Rumampuk Depends on the model. I would get the Imax B6AC which has the power supply built in. I'm not sure what you mean about discharge. The imax has a discharge setting which drains the batteries and calculates the capacity.
Hello.
I have a question. I have an 24V electric scooter and I want to change the 2S 12V Pb-Acid to a li-ion battery pack cells for improved range . My question is: Do I have to put 6S or 7S li-ion cells in a pack, to supply the 24V motor? Some chargers and BMS for 24V electric bike are labeled for 7S li-ion pack. For example, the 24V electric li-ion charger on the market (ebay) has an output voltage of 29.4V (4.2V x 7) and also the BMS for 24V it says 7S configuration. Some people make packs with 6S. I don't know what to choose between 6S and 7S. I don't want to fry my 24V motor. Please help me with an explanation. Thank you.
Any more updates on your ebikes and batteries? Curious to see how it's going.
i found a tip from alibaba wrap finger tips in polyimide kapton tape to protect against shock when touching batteries. battery sparks can disintergrate volt metre probe tips so imagine damage to finger bones
+Mike and Lauren
How did you manage to solder to the 18650's so easily ? I can't seem to get solder to stick to it correctly
+BillTheBox Use plenty of flux and clean the surface
+BillTheBox And pre-tin your surfaces. And use a bigger tip.
I think you can do 36V on the pre-2009 currie ezip trailz. I have a post-2009 version so if it's over 29v, it won't start.
ebike Interesting. I'll have to check that out!
Hi I have an error 8 message on my Chinese 1500 watt 48v ebikemotor kit any ideas why the motor will not switch on? There is no pas attachment. Only one white wire not attached to the motor to controller. Brakes not attached. Pas not attached. Sensor not attached. Thanks Robert
Hi I'm new to learning how to solder but plan on watching more videos on how to do it. Someone said nickel plated solder is not a good idea. And side from that, I'm trying to find out which soldering iron specs I need to look for in order to do this right. I'd like to stay within a 25$ range for the soldering iron if possible. I see ones online that are 60-100Watts for $17 but say nickel plated iron tips. I'm wondering if that's a bad thing. What wattage should I look for in order to do this job right?
Ideally I'd like to start off with a battery pack just like this guy's setup. And then after seeing how that one performs, make a 2nd one to double the range. So please, any helpful guidance in finding a low cost soldering iron kit, without compromising any necessary quality would be highly appreciated. Thank you!
What is the motor from? Where can you get one? Also, does it have an individual sprocket that freewheels as well? Any modifications to mount it in the bicycle frame?
Did you to the drop solder blob trick in order for not heating up and damaging the cells? I can't buy/make my own spot welder (trying to keep costs down).
Thank you and greatly appreciate your reply!
Hi Mike, can you tell me what power is the motor? or how many amp the controller accept? thanks!
Does it matter what current each battery is? Or is it making sure they all charge up to 4.1x volts to ensure they are usable?
I am curious on how many AH that would be if set up as 12v rather then 48 (can't remember if that is what you set it up as). I am wondering as I am trying to replace my current setup that is 12v 95AH. I am assuming higher volt makes lower AH but still has the same amount of energy. just different configuration. any help figuring this out would be nice
variable (Varick) output transform would tame you spot welder. Cheep too.
hey hello...can u please guidr how to make a balance charger of our own..
Quick question.... how come it is ok to put different mAh batteries together in a pack?
Good video. Could you give me link or specs of Cooper wire,?
Hey man like you video, I would like to know how you can discharge 24 pack of battery with the imax charger cos I know the discharge can only be 1cell at a time on imax
I used 7 blocks of 12 18650 recycled cells to power a 24v Homelite push lawn mower. It works fantastic and can mow my lawn for about 2hrs each mowing takes a bit less than 1hr. The lead acid batteries in it were week so I got it for nothing. I bought a box of good (2.5Ah) Panasonic cells for about $1.50, a much better way to get cells than cracking laptop battery boxes and then about half the cells are bad or week, and it's a lot of work.
You simply must check out Jehu Garcia's VW bus powered by blocks of these things.
Sparky! Love the eSamba project! Where did you find the panasonic cells so cheap?
Can you please provide a link to where you bought the battery holders?
I have issues finding them in Germany. On eBay I can only find some shipped from Australia.
Roman Seibel Here they are: goo.gl/2o7YBE
Thank you!
you mentioned grouping batteries of similar capacity together to make each "cell" and show how the crappier batteries will need more of them to make the same capacity, but your finished pack has an equal amount of batteries in all 6 cells. How did that happen? Could that be a reason for the weakness of the range of the batteries?
danh le I just wanted to experiment with it. It turned out my pack was unbalanced and I need to add a few cells to 2 of the groups.
I thought on the balance charger you connect to the + on the first Cell then the rest go on the - of all the Cells ?
Hey Mike,
Here's a thought I had, when you consider making your next battery box you might want to consider this, design it to make the batteries removable. Those plastic clips look like they worked like a champ and if you can run copper for a busbar maybe you can attach the plastic clips to the wood with the busbar pinched between the wood and plastic, then you will have a top and bottom that will come apart without the need to solder. It sounds good in my head when I first thought of it, but now I I ponder a bit the logistics does not seem to add up; but think about it, maybe you can come up with a working solution. I don't solder well, small connections that is, I'm a wiz with plumbing but tiny connections is NOT ME. Oh, getting back to the battery box, you may want to use threaded rod in 4 spots throughout the middle to provide support and to structure. A nut on both sides would secure the threaded rod to the box bottom and then a nut and washer at the top can be used as a leveling system for the over all cover. I don't have the ability to "DO" as I once did due to old age and past injuries but my mind still has some ideas; some of them useful... LOL... Something else you may want to consider is making a battery locking system so that you won't have to take the laptop batteries apart in the first place, just lock it into a cover system. If one needs charged, or replaced, it's easily done. Great use of low priced items...
Paul Bialozor Great ideas. I would be a little concerned about making contact with all 72 batteries all at once. If even one cell slipped down or something, the whole pack voltage would be off. But I do like the idea of quick replacement and repair if needed.
Mike and Lauren Yeah, the more I thought about it the less sense it seemed to make, but the idea is plausible if you can work out the mechanics... LOL... Do you think that is a way to make an external connection for the battery pack itself? That way all you would need to do is replace each 10 dollar Laptop Battery as it went back...
You could if you bought newer laptop batteries. Some of the cheap ones are cheap because they have one bad cell.
Hi just checking is this battery pack still working.
What kind of flux do you use for battery soldering?
How do you get the solder to stick to the batteries?
its amazing mike,where you buy batery holder
Don't you need a protector circuit for each battery?
each group of paral·lel batteries has protection circuit usin BMS. BSM consideres as one battery all the parallel group. of course, if you have not paral·lel group, you have a protection for each battery, but finally, you have a small capacity battery. Remember, paral·lel groups becomes in a capacity summatory, series groups, voltatge summatory.See BMS schematics and will see how it Works.
your link for dont throw that microwave away links back to this video
cade861 Thanks for catching that. Got it fixed.
it's been a while since you posted this, but what is your recommendation on how to discharge the batteries after the first charge.
Hi, I'm from Brazil, congratulations! I'll try to make my own 18650 bike lipo pack too. What was the battery life of this project?
Which motor did you use and how did you find it😀
Cool! Just to confirm, the batteries scrounged from the laptop battery packs are they of different milliamps?
+mibjt Correct
yea different old cells and different mah how much mah minimum i need one cell
Do you have any recommend seller in Ebay for battery?
what temperature is your soldering station set at
Good work...I am redoing my 92 volt pack and instead of using nickle strip using the copper that you did as I had a problem with huge resistance on mine. The little 50 watt charger WILL NOT be able to charge that pack..lol..maybe in 2 weeks... ;) Im wondering because you are using thick copper instead of very thin nickle sheet, what kind of sag do you get?..do you have a watt meter to measure this?... You havent attached any balance wires...how are you going to balance the pack?
From laptop commonly it come with individual BMS each.
one question, how will you manage to balance the 12 cells in each sub-pack? because they are all wired parallel
iwantitpaintedblack You don't. You try and balance the groups of 12 by combining "like" capacities together. Mine were actually off a bit, so I needed to add a couple cells after the video.
hey Mike i bougth Battery Laptop HP New 74 cell inside and all i test 3.7 volt and 1700 mah do i need to charge and discharge the battery before to install the bike thank you Mike
Demsy Rumampuk How do you know they are 1700maH? Did you already test them, or that's just what they say?
it's print on the lebel battery 1700 maH.how do you test the maH? what the purpose of the charge and discharge the battery? thank you Mike i start the project basic on your video
Demsy Rumampuk You test the maH with the iMax B6. It's not completely necessary, but it helps you know for sure what the capacity will be. If it's a used battery, it definitely have as much capacity as advertised.
Thank you Mike now i understand how the battery is and build battery pack,i still wait my battery hold bracket from china soon i finish i post the link my video to you thank you so much it help me understand the battery work good job
How did you organize the batteries? For each cells in one block, do they have to match capacity? And for each block, do they have to match capacity too? I'm bulding 48v pack, 13s10p but I'm still confuse how to organize them.
+ketoi12345678 each series pack has to be very close in capacity but each 18650 doesnt matter just mix and match until each parallel cell is similar
Very impressive work and an enjoyable video.
What are the chances that the old laptop cells you get are so old they are left with only a few cycles? Is it worth the $100?
You mentioned buying even DEAD laptop cells from ebay for this. How can Dead cells be usable if they are really dead? You mean they look dead but are not dead , right?
+Johnny Benson Generally a dead laptop battery means it has one bad CELL out of 6. The other 5 usually have plenty of life left in them.
Mike and Lauren
Genius!
There's more than likely about half to 3/4 good cells. Out of the good cells, half of those should be high capacity.
joblessalex Thanks for sharing , bro. Very nice video.
Hi, I'm a few months behind you and I've stop my project because of the spot welding issue. So my question is :
How did the soldering affect the cells? Were you able to measure it?
+EFA22000 I didn't attempt to measure any loss in capacity, but the battery pack is still working well.
+Mike and Lauren Can you tell me what pulse length you used, and the voltage output of your spot welder? If you lessened the pulse length, or lowered the voltage, could it have been more successful? Thank you
+EFA22000 I soldered mine, no problem whatsoever. I even used buss bars of thick copper and a 450C iron temp. Some I even used two irons together to get the thermal mass! These guys are just scared for no reason. Be as quick as you can, but even if you aren't you should be fine.
+joblessalex Ok thanks
Hi ..Great vid...have you got the link for the expandable 18650 holders? Thanks
What a nice job. I hope it still runs very well! :D I'm currently in the making of a similar project. What gauge wire did you use for the battery, and is there any reason you didn't go for nickel strip welding instead of solid copper wire? Thanks
Simple questions. I'm just starting out learning alot of this stuff but I'm still a little confused about one thing. Each battery holds about 3.7v and my motor is 24v so wouldn't I need somewhere around 7 ion batteries to build a 24v battery. I see in the video you have much more than obviously so either your system needs more power or is it that you can use more 18650s and make it distribute 24 for a longer period of time. Again it's a pretty novice question but we were all novice once.
yes..that is amp hours..24 volts for longer time
I will have my electrical bike with me in my van, in which I don't have access to 230 V and don't like the idea of going through an inverter. Are there any good charging solutions directly from 12 V?
HiTech X4-80 will run off 12v
Hello ...I was wondering if the imax charger has its own BMS...thanx
Hello Mike, great video !
About the battery spacers, are they good and sturdy ? I always try to get reviews for mechanical parts I find on eBay, especially if they come from China, would you recommend using these ?
Jeremy Dahan Once together they are very solid. But the spacers themselves are kind of weak. I made a mistake and had to switch some batteries around and two of the spacers broke in half.
hey Mike great video i try to make battrey for my ebike using your video..i have ebike motor 48 volt 1000 watt.
if i build 48 volt battrey should be i double the battrey or there other way to make ?
if you just 24 volt need cell 72 battrey
if i make 48 volt should be 144 battrey?
and how i conect the 12 block battrey to balance the charge ?thank you mike
Demsy Rumampuk You would make 2 of these battery packs, and charge them separately. When you hook up to the bike, wire the two 24V packs in series to get your 48 volts. I'll be doing the same thing here in a few months!
What is the problem with your side mount electric bike?
Hello, Was wondering who else does ithis after Rinoa.:))) great work.
So, if 4.1v is the full charge for 3.7v cell, then for the 24 volts battery pack to be fully charged the voltage should reach 28 volts right?
Forgot to tell, Rinoa said his pack give 200mile range. 😮
+Kketansa Art 4.2v is full charge, use 7 in series for 24v systems
DMAN22yeah Hello, thank you:)
Actually what I was asking -
If 3.7v cell, when full charged = 4.2v(charging cut off).
Then, 7 in series 24v, when full charged = how much cut off limit voltage?
Kketansa Art you need to have a balance charger, so use a 7s balance charger. 3.7v on a cell open circut is fairly low charge. 4.2v is full charge. a 7s battery will give 29.4v, which will give you extra power and less voltage drop
phoah that welder. dude, get a super capacitor to do the welding so at least its discharge itself through and eventually stop. having a switch which is constant until you stop is a no no in my eyes.
hopefully others can try use this method instead and use a couple of farad caps or something.
even if you had put some limiter to stop after X amps for X time would be good.
hy mıke your perfect :)but I have to you ask a questıon .you take it how many amps from the battery?I'd be happy if you answer my questıon.
I like your neat workshop and the way you tools are organized. Just a few comments. You can still use your spot welder for battery tab spot welding. Go to Ebay and buy a timer circuit like this one:
Search: DC 12V DC Multifunction Self-lock Relay PLC Cycle Timer Module Delay Time Switch
It will allow you to set on time down to 0.1seconds. Therefore you will not burn through.
I am glad to hear you are going to put on balance charging.
Good video and nice job on the batteries.
valveman12 Thanks for the tips! I'll check out the timer circuit.
+Mike and Lauren I built my own Spot Welder from a Microwave Oven and using the timer will prevent the problem you were having. You should try it on some test pieces to discover the correct on time.
Hi can anyone help I have brought a 1000w e-bike motor 48v. I have came to the battery side and copped it from RUclips. unfortunately after 10 mins my imax b6 comes up with err so after trying a number of things I ended up buying a new I max b6 which come up with the same err any advice please
Hey, awesome video! Can you tell what are the specifications of your 24volt motor or the exact brand which manufactures it?
where I can get the tires to ORGANIZE the bateris ?
joeltikful eBay. They're called 18650 connectors
what was the capacity of the cell when all said and done?
+danz409 from the description:
UPDATE: The battery had a total capacity of 19aH. The groups of cells were slightly out of balance (3.3v, 2.5v, 2.9v, 2.5v, 3.1v, 2.9v) so I could rearrange some cells and get a few extra miles, but I'm happy enough with the results.
Hi , I need some help . I start my project today and the first cell I removed from laptop batterys charged to 1600 to 2500 , but when I discharge than I get 300 mha . I used the same charge rate 1 Amp . What am I doing wrong ?
Hey, I was wondering if i can use normal 1 mm copper wire instead ?
Dear sir
Please tell me that old laptop 18650 cell's ev battery pack's life cycle how much
Hi..
I have a question.
if i wanna make a 48v battery pack i have to make the same process but with the twice of batteries or i can make 2 of this en put it in series and get the 48v.
+Johniel mancebo cordero yes thats what rinoa super genius did but you should use 13s instead of 12s because it will give more range and power even at a lower charge percentage
Thanks Bro. ...... this is exactly Wat I needed... I'm building a 24v ebike.... just got my 18650 dead laptop batteries and I'm doing the test now to check the capacity... how to stay in touch... God bless u..
Hope to stay in touch##
Hey, I loved your video! I was wondering how thick the copper wire was that you used to solder together the cells. Is thicker or thinner better?
+Vidgester1999 I used 12 gauge solid core wire and stripped the coating off.
Does the Imax b6 have a limit on pack size?