I hope you guys enjoyed my How to Build a Lithium Battery tutorial series. If you want to learn even more, I hope you'll consider checking out my Amazon #1 Bestselling book, DIY Lithium Batteries, available in paperback and ebook formats. a.co/iDtWdPX
@@RoCCo_CarmeLL right and well he talks about not soldering but umm isn't the word HOT in HOT GLUE gun a red flag. WTF So yah let's spread a 280-degree molten gel all over our batteries, but not a tiny amount of 300-degree molten liquid in a small spot on the top of our batteries
Micah Toll, I STRONGLY ADMIRE YOUR TEACHING AND PRACTICAL DEMONSTRATIONS OF YOUR EXPERTISE IN ENGINEERING . i have greatly benefited from your pieces of advice and guidance. And so, thank you very much though I am struggling to buy copies of your publications and hope to be able to get through sir. We are enjoying your kindness.
Hi. I am a beginner and Im planning to diy a electric skateboard but have no idea about battery packs. Your videos are super helpful to me. Many thanks to you!
right and well he talks about not soldering but umm isn't the word HOT in HOT GLUE gun a red flag. WTF So yah let's spread a 280-degree molten gel all over our batteries, but not a tiny amount of 300-degree molten liquid in a small spot on the top of our batteries
i was thinking i should apply a black insulator tape on the sides of the battery groups i SHOULDN'T weld together serially , just in case i'll start going into a fixed trance and weld them by mistake. what do you think ? btw shouldn't you use gloves and long sleeves when welding?
The black tape could be a good reminder, but you should always be double checking everything before you lay down the nickel strip. Placing it in the wrong spot could lead to series sparks. And yes, I should have been wearing gloves. I had them on for part of the video but I had to keep removing them to work the camera and forgot to put them back on. Long sleeves is probably a good idea as you occasionally get a little spark, but you're probably fine without them.
Good quality video. Very informational, down to even small details, like the terminal gasket explanation. I was not aware how important they are, and how easily a short circuit can be created without them!! Thanks for sharing your knowledge and pointing that out!!
Could this same battery be used for a solar power system and would the cells be wired together the same way where you put them in parallel and then in series
Can you build battery with cells has same exact voltage but different capacity? Like I got different batteries has same voltage but different capacity so can I mix ? If they have same voltage but different capacity ? Thank you really need to know this information
You explain how to weld, line up cells, and things like that, but explain very little on "How to pick the right BMS for the job". I have gotten as far as I know I need a 48V 13S, but now I am trying to figure out what Amp should I use, Can you please explain that? I have both you books and cannot find anything that will help me.
QUESTION i am building a 13s 6c pack for a bike. these are used cells all been pre tested and ma written on. i have used the site to arrange the cells..now the ma vary from 1880 to 2500. the auto cell program mixes the 2500 with the 1800s..is this safe or will it cause damage or reverse charge the cells hope you can help cheers
Do you know where you can get that plastic holders to keep the cells together for spot welding? any tips to put a 14S4P hailong battery pack? I can barely close the case, and I even had to trim some parts, not perfect but works. I bought your book, very good info btw. thank you.
I just picked up a 12kw capacitor welder that says it can weld .3mm but most say .2. Any experience with these? Mine is US solid USS-BSW06. The one you have says 800amp but mine says 2400amp. Is it that much more powerful or just different since yours is transformer and mine is capacitor?
Are there any cheaper spot welders that do the job considering that I won't be using such equipment on a regular basis? I have seen less expensive portable welders. Are they any good? What should one be looking for (power needed/ current etc)?
Hi Micah, i have your book. Why is nickel plated steel not as good? Does it have a lot of resistance? I seem to find it everywhere... which is annoying. But the pure nickel is double the cost. I wonder if it really matters or not
but if those strips can only carry 5 amps then won't you run into overheating problems with the positive and negative ends each handling 15amps getting sent to the controller since you only welded one strip. I understand its a parallel connection but won't you have 15 amps going through it anyway?
Don't know if you come back and update your videos but was wondering why doesn't my Sunko 737G Plus not spot weld .15 x 10mm strips. Tried many different setting and no weld. Does the width affect the weld? If I try welding the strips that came with the welder it does just fine but those are nickel-coated steel.
Thanks for the video ! As the voltage is not the same when the batteries are fully charged or not, do you check them when they are fully charged to know if you need to throw them out ?
how much current are you getting from the microwave oven transformer? I'm using 4 gauge wire for the electrodes , 35 sq mm welding wire for the secondary winding but not getting more than 250 amps...pls lemme know what should I do...I bought a 70 sq mm wire and will be attempting a rewind hoping the current increases.
what is the difference in using nickel strips and fuses ? I came across some videos in which some have used nickel strips and some just the fuses and in fuses how is the series and parallel connection made with fuses thanks for ur time!
I want to buold a battery for a 1000w motor. But, i want distances to be very long. How many cell should i purchase and what amp to get 50 miles with out pedaling?, Thanks
Hi sir i have sumsung 3.7v 2600mah battery 150 pices i want to make 48v battery pack can you make a digram of 48v battery pack and how many volt BMS should i Use
So say i invest into a 72v eBike Conversion Kit maybe 2000w+ Would making my own battery pack be better option, price wise because ive seen packs cost as much if not more then the actual kit which is just bank breaking for just getting into riding and all. This is certainly something i would like to get into, just the final product i would hope i could make water resistance or proof at best. Nice tutorial, very clear, pretty fascinating, and i plan to do this, if its more affordable that is, checking now hewhew.
72V batteries can get very pricy, so building your own can be an affordable option. Most people don't start with a 72V ebike though. It's a lot of power - just make sure you know what you're getting into. Happy riding!
We want can be rechargeable and dischargeable battery for bicycle for parallel operation like conversation battery can chargeable and dischargeable in same time any device
Another great video. Can you get the nickel strip thicker than .15mm so you don't have to double it up? I'm thinking of for like a 48v bank, but some where around 2000 to 2500 watts for extreme long range for an emergency type bike to carry a heavier load.....or what would you suggest, 2 or 3 separate banks or what? Thanks and keep up the great work.
Do you mean watts or watt hours? Range is related to watt hours. Building a battery to carry that many watts is doable, but you'd need thicker series connections as you noted. If you have a really strong spot welder then you can weld thick strips, but most hobby spot welders like this one can only do up to about 0.15mm and still get good quality welds.
Okay, but volts x amps = watts, so a watt is a measurement of power used per hour, so if you have a 300 watt appliance, it uses 300 watts per hour as long as it's on, so what's the difference? I mean this is what I learned in electronics 101, but I am no pro at this at all. I was kind of looking at range and battery banks of many different bikes, motors, and batteries, and I kind of come to the conclusion that 30 watts to go one mile with a load and a little help from the rider, is probably do-able......I think???? Maybe it would be smarter and easier to build 4 battery banks that are 500 to 700 watts, and now you have back up banks in case one fails some how???? Also, is there anything out there that uses solar panels to charge a battery bank?
Confusion between watts and watt hours is a common problem. To correct your first sentence above, a watt isn't a measurement of power used per hour, thats a "watt hour". watts = instantaneous power, and watt hours = total amount of energy. If we were talking about a car, watts would be equivalent to the horsepower of the engine, while watt hours would be equivalent to the gallons (or liters) of the gas tank. 30 watt hours per mile is definitely achievable. My most efficient ebikes got twice that. But 30 "watts per mile" is meaningless. It's like saying it takes 100 horsepower to go one mile... doesn't make sense. Some people build multiple packs and parallel them, that way if something goes wrong in one pack it doesn't destroy one giant pack. Google "solar lithium charger" and you'll find some solar charge controllers meant for charging lithium battery banks.
Nice one too. Some battery builders think that the cells should have "cooling space" between them rather than stick them together with glue. What's your opinion about that? Could that be a problem in hot days for example?
I mentioned that in the video. Air space makes almost no difference because the air quickly heats up, removing almost all cooling effect as very little heat is transferred to the thermally insulating case materials.
Well I tend to figure out that it is better if there are spaces and there is also some kind of ventilation so that the air is circulating and it doesn't remain static between the cells. If you use insulation wraps like heat shrinks maybe it's not a big difference.
These are brand new, high quality Sanyo cells. Fuses aren't as necessary in this case. More important for salvaged/recycled cells. What the next video in this series to see the BMS (PCM) added to the battery.
What gloves would you recommend for building an ebike battery using a spot welder? Class 0 latex gloves (good for up to 1000v) are quite expensive. Would disposable latex gloves be fine for 50v or so?
Yes, cheap latex gloves are fine. Anything to keep your sweaty palms off of the contacts. Just note that those gloves can tear easily, so keep a few backups on hand.
If you have a low current circuit breaker then yes, sometime you'll have to keep resetting it or swap it out for a stronger one. These welders aren't much of a safety issue though because they draw a pulse of electricity for a few milliseconds. Your circuit breakers are designed to keep you from pulling continuous high power for long periods of time.
Please note that it's NOT OK to replace a 15A circuit breaker in your breaker panel with a 20A breaker because the 15A breaker is tripping due to a higher current load. The 15A circuit likely has AWG 14 wiring, which is not listed for a 20A load. That being said, sometime you can have a "weak" circuit breaker. In this case, if you're pretty sure that the total circuit draw on say, a 15A circuit is less than 15A and the breaker is tripping, you may want to replace the 15A breaker with a new 15A breaker. Also note that you are always supposed to replace a breaker with the same brand as the panel - i.e. Square-D panel gets a Square-D breaker, GE panel gets a GE breaker, Murray-Murray. (Even though they are mechanically interchangeable.)
Hello, is not the same if I make first 10 batteries in line to make 36 volts and after connect it to paralel that peaces? The reason is to add more amh if I want.
bruh your English is fine aha, you could solder them together but that is not really safe, at all, another option is to watch his video on how to build a battery without a spot welder and buy prespot welded gropes then solder between batteries where its safe
Your English is better than most native English speakers. :P You can solder, but that heats the cell up and I personally wouldn't recommend it. The other option I've seen is using something called "batteryblocs". They're a modular enclosure that allow you to drop 18650s in, secure and protect them, build big packs, and not have to solder or weld. They're cheap, too! www.batteryblocs.com/
Build a spot welder. If you have the skills to build an electric transport or even a battery pack, you can build a spot welder. There are even examples of using 18650 batteries to do the welding. There is never an excuse to solder batteries.
Hi, I want to buy the same spot welder. In the description, this welder has input 220V. In the video, I can see you are using a plug adaptor for your U.S, CAN, JP wall outlet. I sent an email to the store and got a reply to get 788-H model. Do you much lower power with your setup? You could put both in the description so others can order what they need and you still get your commission.
hay i bought your battery book and love what im reading. my biggest challenge is the welding. i live in an older apartment with fuses and my biggest worry i get a battery welder and i use it...then a start a fire or something. do you have a recommend any advice before i do this?
If you're worried about the wiring in your building, you can look at arduino spot welders. Google it. They are powered by either a car battery or a RC lipo battery, so you don't even have to plug them into the mains power. They are a new class and not very common yet, but they are starting to become available in kit form.
most of the stuff there actually took 3 months to ship to me but I got my welder in 2 weeks and she works beautifully, I do live in Australia so that's probably why it didn't take long to ship a prebuild thing
Great video series! But wait a sec... you go through all the trouble to build this pack and haven't tested any of your cells beyond voltage? Do you do an internal resistance check and match cells? Do you charge/discharge them a couple of times? You don't drain them hard to check for weak cells? Sure, it's a bit of extra effortl but it's better to spend some time checking than to have to disassemble an entire pack to hunt down a bad cell, especially as the number of parallel'd cells increases. And especially being that you're/we're welding them together.
These are brand new cells straight from the factory. Reputable companies like Panasonic, Sanyo, LG, etc do multiple checks per cell before they leave the factory. They don't ship bad cells. But if you use salvaged/recycled cells, then you should do exactly as you said and weed out any bad cells.
@Kamal Boro If you do not understand at this point the difference between series and parallel connections and their consequences DO NOT START BUILDING LITHIUM BATTERIES IF YOU VALUE YOUR LIFE! This is especially true when making large assemblies like the one in the video. Making errors in assembly like like creating a short circuit can cause a fire or explosion instantly. Lithium batteries are no joke!!! However, FYI: Consider two identical batteries eg 3.7V ,and 2000mA in: SERIES: Voltages is the sum of the two batteries, ie 7.4V, and the current is the average of the two batteries, ie 2000 mA. PARALLEL: The voltage is the average of the two batteries, ie 3.7V, and current is the sum of the two batteries ie 4000mA.
Battery spot welding machine is mainly used for 18650 cylinder call pack welding, it can weld Nickel tab thickness from 0.02-0.2 mm with good welding effect. The pneumatic model is with smaller volume and weight, easy for international shipping. click on www.tobmachine.com/18650-Battery-Spot-Welding-Machine_p766.html, view more.
I'm from China, my English is not so good. hope you can understand what i said. my question is ,how can you get these 18650 cell, and before you pack it into battery, do you array it by its internal resistance. by the way, your lession is very good, thanks you
Good video! I'm from Spain. Sorry for my english. I would like to know where I can fine this Sanyo Batteries of 3500mAh with good quality. I heart that there are a lot of copies that doesn't have the same quality. If these bateries are difficult to find, where I can buy the panasonic 3400mAh.? Thank you!
Unfortunately the place I got it from isn't selling anymore, but you can find some more vendors here: goo.gl/FuBi07 Just make sure it's pure nickel. If a kg costs less than about $60, it's probably nickel plated steel.
Hy! I really like yours videos, you make a good work and you are a professional of Li-Ion batteries!! I started also to do my only batteries pack for a project and i bought the same spot welding like yours from Bangood.com but i have a little problem, it seems it can not weld the nickel strip 0.15 8mm. Could be because i use the strips that they sent to me and its not a good quality or it's the spot welding! Thanck you.
Hello again, learnt alot from this video, i have a question about the last part of the video about the nickle strip, my battery will able able to carry 20 amps max current. when u say 15amps on your controller, do you mean 15 amps continuous current? i want to make a 10s4p battery, using this bms: www.aliexpress.com/item/10S-15A-BMS-for-36V-li-ion-battery/1195130789.html? would it be okay to use 1 layer or nickel strips, or should i just add 2 layers for extra protection. thank you,.
The controller has a max current of 15A. So if you are riding full throttle up a hill for a long time, the battery will be seeing a continuous current of 15A (for as long as you keep it under full load). The BMS doesn't have any effect on controlling the current that is coming out of your battery. The 15A rating on the BMS you linked to just means that it can handle 15A continuously without burning up. If your controller is a 25A and you run full throttle up a hill for a long time, there's a chance you'll burn the BMS. It's the controller that decides how much current is flowing out of your battery, so I can't answer the question about the number of nickel strips without knowing what controller you'll be running with.
Yes, those are Samsung 25R cells and they are quite good. A controller is an electronic speed controller. It's usually a silver or black box with many wires coming out of it on your bike somewhere. Do a search for ebike controller and you'll see.
i see now, the esc is 60A Continuous Current, and 300A Peak Current Limit. Voltage rating of components 8V-50V, Compatible battery 3S to 12S, Recommended 10S battery. However i want to use 2 of these esc with the 10s4p battery
Yes I enjoyed. But technically adding more strips doesn’t actually give you more amp carrying capabilities. (Kind of) if you’re working the current at close to maximum output (in comparison with the nickel strips) (that and I didn’t look up the maximum output of 4 cluster batteries) it’s a matter of the weakest link. Check out some videos on parallel resistors. (Same thing)
I hope you guys enjoyed my How to Build a Lithium Battery tutorial series. If you want to learn even more, I hope you'll consider checking out my Amazon #1 Bestselling book, DIY Lithium Batteries, available in paperback and ebook formats. a.co/iDtWdPX
I still don't know why you don't use copper... Its only like 5 bucks for a .5mm paper back book size piece :-0
I just bought the book thx
How that hot glue dont get soft again, when us8ng batterys or charging it.. It cimes to 50c or 60c when charging hmm
@@RoCCo_CarmeLL right and well he talks about not soldering but umm isn't the word HOT in HOT GLUE gun a red flag. WTF So yah let's spread a 280-degree molten gel all over our batteries, but not a tiny amount of 300-degree molten liquid in a small spot on the top of our batteries
Thank you for your clear instructions. Thanks to you my first battery build is making good progress. The next step will be the BMS 🙂
Micah Toll, I STRONGLY ADMIRE YOUR TEACHING AND PRACTICAL DEMONSTRATIONS OF YOUR EXPERTISE IN ENGINEERING . i have greatly benefited from your pieces of advice and guidance. And so, thank you very much though I am struggling to buy copies of your publications and hope to be able to get through sir. We are enjoying your kindness.
Honestly you are awesome man 👌🏼 I’m so grateful for you doing these videos! I’ve learned so much in just two videos! You are a great teacher.
I learn many new things every video of yours I watch. Many thanks!
Hi. I am a beginner and Im planning to diy a electric skateboard but have no idea about battery packs. Your videos are super helpful to me. Many thanks to you!
right and well he talks about not soldering but umm isn't the word HOT in HOT GLUE gun a red flag. WTF So yah let's spread a 280-degree molten gel all over our batteries, but not a tiny amount of 300-degree molten liquid in a small spot on the top of our batteries
This is a really great video. Didn't know about the Nicole strips or the 5 amp rule. Very informative. Thanks.
I just found your channel and wanted to say thank you. Also could you lead me in the right direction for an entry level spot welder?
Super video! What welder are you using? And what settings did you use?
Hi, what parameters to set the spot welder mac? Thanks a lot!
Hi. Your Sanyo link isnt working. Di you have another link or update ? Thank you
i was thinking i should apply a black insulator tape on the sides of the battery groups i SHOULDN'T weld together serially , just in case i'll start going into a fixed trance and weld them by mistake.
what do you think ?
btw shouldn't you use gloves and long sleeves when welding?
The black tape could be a good reminder, but you should always be double checking everything before you lay down the nickel strip. Placing it in the wrong spot could lead to series sparks.
And yes, I should have been wearing gloves. I had them on for part of the video but I had to keep removing them to work the camera and forgot to put them back on. Long sleeves is probably a good idea as you occasionally get a little spark, but you're probably fine without them.
is the use of hot glue to connect the cells still adviseable today?
Good quality video. Very informational, down to even small details, like the terminal gasket explanation. I was not aware how important they are, and how easily a short circuit can be created without them!! Thanks for sharing your knowledge and pointing that out!!
I wanna learn welding also. Is it also possible to upgrade old battery with low mAh to higher mAh
Your videos are brilliant!
Very nice video my kind of style - hot glue for the batteries not the holders are sometimes they are hard to find and make battery bigger
Could this same battery be used for a solar power system and would the cells be wired together the same way where you put them in parallel and then in series
do you mean to say that such a battery does not need cooling?
And bigger batteries for a motorcycle or a car?
Can you build battery with cells has same exact voltage but different capacity? Like I got different batteries has same voltage but different capacity so can I mix ? If they have same voltage but different capacity ? Thank you really need to know this information
You explain how to weld, line up cells, and things like that, but explain very little on "How to pick the right BMS for the job". I have gotten as far as I know I need a 48V 13S, but now I am trying to figure out what Amp should I use, Can you please explain that? I have both you books and cannot find anything that will help me.
I think I wasted my money.
QUESTION i am building a 13s 6c pack for a bike. these are used cells all been pre tested and ma written on. i have used the site to arrange the cells..now the ma vary from 1880 to 2500. the auto cell program mixes the 2500 with the 1800s..is this safe or will it cause damage or reverse charge the cells hope you can help cheers
Do you know where you can get that plastic holders to keep the cells together for spot welding? any tips to put a 14S4P hailong battery pack? I can barely close the case, and I even had to trim some parts, not perfect but works.
I bought your book, very good info btw. thank you.
I just picked up a 12kw capacitor welder that says it can weld .3mm but most say .2.
Any experience with these? Mine is US solid USS-BSW06. The one you have says 800amp but mine says 2400amp. Is it that much more powerful or just different since yours is transformer and mine is capacitor?
Are there any cheaper spot welders that do the job considering that I won't be using such equipment on a regular basis? I have seen less expensive portable welders. Are they any good? What should one be looking for (power needed/ current etc)?
The welder you have would cost me Eur 101 + Eur 90 shipping!! A portable device would cost me less than Eur 50 shipping inclusive.
Question I have a 32700 5000mah cell can you help me to build a 100ah 12v battery, storage batt solar for my garage, thank you
Hi Micah, i have your book. Why is nickel plated steel not as good? Does it have a lot of resistance? I seem to find it everywhere... which is annoying. But the pure nickel is double the cost. I wonder if it really matters or not
Yes it is higher resistance and results in lower battery performance.
but if those strips can only carry 5 amps then won't you run into overheating problems with the positive and negative ends each handling 15amps getting sent to the controller since you only welded one strip. I understand its a parallel connection but won't you have 15 amps going through it anyway?
With this spotwelder can weld the nickel strip 0.20mm ? I think is impossible to get a good weld
4000kw
Don't know if you come back and update your videos but was wondering why doesn't my Sunko 737G Plus not spot weld .15 x 10mm strips. Tried many different setting and no weld. Does the width affect the weld? If I try welding the strips that came with the welder it does just fine but those are nickel-coated steel.
with 4, 3.5ah battery in parallel would equate to a 14 amp battery? I am just learning just verifying. Thanks!
Very well done instructional video, I tried soldering and spot welding....I'll stay with spot welding.
Thanks for the video !
As the voltage is not the same when the batteries are fully charged or not, do you check them when they are fully charged to know if you need to throw them out ?
how much current are you getting from the microwave oven transformer? I'm using 4 gauge wire for the electrodes , 35 sq mm welding wire for the secondary winding but not getting more than 250 amps...pls lemme know what should I do...I bought a 70 sq mm wire and will be attempting a rewind hoping the current increases.
thanks for u video but what standard Amp with timer ?
great explanation.would be nice if adding volt explaination.i still dont understand that part.thanks
what is the difference in using nickel strips and fuses ?
I came across some videos in which some have used nickel strips and some just the fuses and in fuses how is the series and parallel connection made with fuses
thanks for ur time!
How do u know what side is positive and negative
what settings do you use on your welder?
I want to buold a battery for a 1000w motor. But, i want distances to be very long. How many cell should i purchase and what amp to get 50 miles with out pedaling?, Thanks
0.15*8 mm pure nickel strip can support 30-40 amp Current ?.i build 18650 48V (13s 6p)
No it can support a max of 10A per strip, but 5A is better.
how many tension and current it need to weld?
Can you provide a link to the magnetic holder you're showing here?
Hi sir i have sumsung 3.7v 2600mah battery 150 pices i want to make 48v battery pack can you make a digram of 48v battery pack and how many volt BMS should i Use
Does each of these cells have protection circuit?
So say i invest into a 72v eBike Conversion Kit maybe 2000w+
Would making my own battery pack be better option, price wise because ive seen packs cost as much if not more then the actual kit which is just bank breaking for just getting into riding and all. This is certainly something i would like to get into, just the final product i would hope i could make water resistance or proof at best. Nice tutorial, very clear, pretty fascinating, and i plan to do this, if its more affordable that is, checking now hewhew.
72V batteries can get very pricy, so building your own can be an affordable option. Most people don't start with a 72V ebike though. It's a lot of power - just make sure you know what you're getting into. Happy riding!
do you weld them out the box or do you charge every cell first?
how much of a damaged they gotten after spot welding the cells together? what is the voltage and amperage of the spot welder?
Can I use solder to welding between the battery
We want can be rechargeable and dischargeable battery for bicycle for parallel operation like conversation battery can chargeable and dischargeable in same time any device
Another great video. Can you get the nickel strip thicker than .15mm so you don't have to double it up? I'm thinking of for like a 48v bank, but some where around 2000 to 2500 watts for extreme long range for an emergency type bike to carry a heavier load.....or what would you suggest, 2 or 3 separate banks or what? Thanks and keep up the great work.
Do you mean watts or watt hours? Range is related to watt hours.
Building a battery to carry that many watts is doable, but you'd need thicker series connections as you noted. If you have a really strong spot welder then you can weld thick strips, but most hobby spot welders like this one can only do up to about 0.15mm and still get good quality welds.
Okay, but volts x amps = watts, so a watt is a measurement of power used per hour, so if you have a 300 watt appliance, it uses 300 watts per hour as long as it's on, so what's the difference? I mean this is what I learned in electronics 101, but I am no pro at this at all.
I was kind of looking at range and battery banks of many different bikes, motors, and batteries, and I kind of come to the conclusion that 30 watts to go one mile with a load and a little help from the rider, is probably do-able......I think????
Maybe it would be smarter and easier to build 4 battery banks that are 500 to 700 watts, and now you have back up banks in case one fails some how????
Also, is there anything out there that uses solar panels to charge a battery bank?
Confusion between watts and watt hours is a common problem. To correct your first sentence above, a watt isn't a measurement of power used per hour, thats a "watt hour". watts = instantaneous power, and watt hours = total amount of energy. If we were talking about a car, watts would be equivalent to the horsepower of the engine, while watt hours would be equivalent to the gallons (or liters) of the gas tank.
30 watt hours per mile is definitely achievable. My most efficient ebikes got twice that. But 30 "watts per mile" is meaningless. It's like saying it takes 100 horsepower to go one mile... doesn't make sense.
Some people build multiple packs and parallel them, that way if something goes wrong in one pack it doesn't destroy one giant pack.
Google "solar lithium charger" and you'll find some solar charge controllers meant for charging lithium battery banks.
This amazing.Exelent.God bless you !!!
Nice one too. Some battery builders think that the cells should have "cooling space" between them rather than stick them together with glue. What's your opinion about that? Could that be a problem in hot days for example?
I mentioned that in the video. Air space makes almost no difference because the air quickly heats up, removing almost all cooling effect as very little heat is transferred to the thermally insulating case materials.
EbikeSchool.com You are right I missed that part sorry. Thanks for replying!
Savvas Berdos honestly if the pack is vented like it should be anyway... (Heat safety reason) then the spacing would help.
Well I tend to figure out that it is better if there are spaces and there is also some kind of ventilation so that the air is circulating and it doesn't remain static between the cells. If you use insulation wraps like heat shrinks maybe it's not a big difference.
What welder are you using?
y are you welding across each cell just the ends is ok?
What's your opinion on DIY spot welders? Like ones made from using a car or lead acid battery or ones made using the transformer from a microwave?
There are some good arduino based ones that use a car battery. From what I've seen, they work even better than my welder I used in this video.
why not adding fuse wires? any particular reason? do the cells have built in protection? any thoughts on PCM (Protection Circuit Module)?
These are brand new, high quality Sanyo cells. Fuses aren't as necessary in this case. More important for salvaged/recycled cells. What the next video in this series to see the BMS (PCM) added to the battery.
Great series! I've learned quite a bit following your instructions....One question, though. What was the purpose of the safety gloves? ;-)
in case of rapid leak/fire. Protect your hands and face.
@@CabrioDriving did you not notice that he was not wearing any after making the point to always wear them? I was teasing him. gotcha :-)
What gloves would you recommend for building an ebike battery using a spot welder? Class 0 latex gloves (good for up to 1000v) are quite expensive. Would disposable latex gloves be fine for 50v or so?
Yes, cheap latex gloves are fine. Anything to keep your sweaty palms off of the contacts. Just note that those gloves can tear easily, so keep a few backups on hand.
EbikeSchool.com brilliant. Thank you
it's fine you don't need gloves just don't shock yourself for to long
Is it true that these spot welders can blow the breaker if your house? And it's not recommended for home use?
If you have a low current circuit breaker then yes, sometime you'll have to keep resetting it or swap it out for a stronger one. These welders aren't much of a safety issue though because they draw a pulse of electricity for a few milliseconds. Your circuit breakers are designed to keep you from pulling continuous high power for long periods of time.
Please note that it's NOT OK to replace a 15A circuit breaker in your breaker panel with a 20A breaker because the 15A breaker is tripping due to a higher current load. The 15A circuit likely has AWG 14 wiring, which is not listed for a 20A load. That being said, sometime you can have a "weak" circuit breaker. In this case, if you're pretty sure that the total circuit draw on say, a 15A circuit is less than 15A and the breaker is tripping, you may want to replace the 15A breaker with a new 15A breaker. Also note that you are always supposed to replace a breaker with the same brand as the panel - i.e. Square-D panel gets a Square-D breaker, GE panel gets a GE breaker, Murray-Murray. (Even though they are mechanically interchangeable.)
Hello, is not the same if I make first 10 batteries in line to make 36 volts and after connect it to paralel that peaces? The reason is to add more amh if I want.
Yes, that would work also. Just makes sure that the cells are the same voltage before you do your parallel connections.
Thanks for answer.
Sorry for my english but, can i use another way to weld the nickel strip without using the spot welder?
not so bad, man..!
bruh your English is fine aha, you could solder them together but that is not really safe, at all, another option is to watch his video on how to build a battery without a spot welder and buy prespot welded gropes then solder between batteries where its safe
Your English is better than most native English speakers. :P You can solder, but that heats the cell up and I personally wouldn't recommend it. The other option I've seen is using something called "batteryblocs". They're a modular enclosure that allow you to drop 18650s in, secure and protect them, build big packs, and not have to solder or weld. They're cheap, too! www.batteryblocs.com/
Build a spot welder. If you have the skills to build an electric transport or even a battery pack, you can build a spot welder. There are even examples of using 18650 batteries to do the welding. There is never an excuse to solder batteries.
Hi, I want to buy the same spot welder. In the description, this welder has input 220V. In the video, I can see you are using a plug adaptor for your U.S, CAN, JP wall outlet. I sent an email to the store and got a reply to get 788-H model. Do you much lower power with your setup? You could put both in the description so others can order what they need and you still get your commission.
hay i bought your battery book and love what im reading. my biggest challenge is the welding. i live in an older apartment with fuses and my biggest worry i get a battery welder and i use it...then a start a fire or something. do you have a recommend any advice before i do this?
If you're worried about the wiring in your building, you can look at arduino spot welders. Google it. They are powered by either a car battery or a RC lipo battery, so you don't even have to plug them into the mains power. They are a new class and not very common yet, but they are starting to become available in kit form.
What's the price of the spot welder? and where can I get one.
were do you get 10mm .3 pure nickle
To be honest, I watched this whole video just because I liked the spot welder. 😩I want one. XD
@Yute Hube Four years ago I was a poor boi. They're more affordable for me now. XD
What do you do if by accident you happen to make a wrong weld and short the batteries?
Just laying the nickel strip down to complete the circuit will spark. That would be all the reminder you need.
So 4 strips across for series connections gives 20 amps (4 x 5). Does it not matter how much nickel is on the parallel groups?
There's very little current flow across parallel connections
Where did you buy that large reel of nickel strip from please.
What cells are you using and where did you buy them at (how much each, how man etc) Also what are the settings on the spot welder?
These are Sanyo cells, check the description for links to all the parts. The welder is set to 40 with a double pulse.
Wow thank you for the great info your videos are amazing!!
where did you get the battery welder?
i have been soldering my cells for years but the welder looks so much faster
Check the description to the video. I put the links to the tools I use there.
yuck aliexpress
the home of chinese scammers and 3 month postage time
i think il look elsewhere
most of the stuff there actually took 3 months to ship to me but I got my welder in 2 weeks and she works beautifully, I do live in Australia so that's probably why it didn't take long to ship a prebuild thing
Great video series! But wait a sec... you go through all the trouble to build this pack and haven't tested any of your cells beyond voltage? Do you do an internal resistance check and match cells? Do you charge/discharge them a couple of times? You don't drain them hard to check for weak cells? Sure, it's a bit of extra effortl but it's better to spend some time checking than to have to disassemble an entire pack to hunt down a bad cell, especially as the number of parallel'd cells increases. And especially being that you're/we're welding them together.
These are brand new cells straight from the factory. Reputable companies like Panasonic, Sanyo, LG, etc do multiple checks per cell before they leave the factory. They don't ship bad cells. But if you use salvaged/recycled cells, then you should do exactly as you said and weed out any bad cells.
What current and pulse settings did you used?
what is the difference between parall and seris connection ?
Make sure you watch Part 1 of this video series, it is explained there: ruclips.net/video/b3eRv_FZjBc/видео.html
@Kamal Boro
If you do not understand at this point the difference between series and parallel connections and their consequences DO NOT START BUILDING LITHIUM BATTERIES IF YOU VALUE YOUR LIFE! This is especially true when making large assemblies like the one in the video. Making errors in assembly like like creating a short circuit can cause a fire or explosion instantly. Lithium batteries are no joke!!!
However, FYI: Consider two identical batteries eg 3.7V ,and 2000mA in:
SERIES: Voltages is the sum of the two batteries, ie 7.4V, and the current is the average of the two batteries, ie 2000 mA.
PARALLEL: The voltage is the average of the two batteries, ie 3.7V, and current is the sum of the two batteries ie 4000mA.
Battery spot welding machine is mainly used for 18650 cylinder call pack welding, it can weld Nickel tab thickness from 0.02-0.2 mm with good welding effect. The pneumatic model is with smaller volume and weight, easy for international shipping. click on www.tobmachine.com/18650-Battery-Spot-Welding-Machine_p766.html, view more.
All I have is the standard 110 volt outlet. What do you recommend?
Me, Pure zero and this was very informative...but am more intrigued by the terminal cap method...easier RandR.
I'm from China, my English is not so good. hope you can understand what i said. my question is ,how can you get these 18650 cell,
and before you pack it into battery, do you array it by its internal resistance. by the way, your lession is very good, thanks you
Really nice detailed video. Is it important to start on the positive side when doing the parallel group or it doesn't matter?
Good video!
I'm from Spain. Sorry for my english. I would like to know where I can fine this Sanyo Batteries of 3500mAh with good quality. I heart that there are a lot of copies that doesn't have the same quality. If these bateries are difficult to find, where I can buy the panasonic 3400mAh.?
Thank you!
thanks for the awesome videos! mines going in my van but soon i will make a solar sound system for my bike:)
i have 40pcs battery 3.7 4ami want 36v or 48v
Where can I buy that size of Nickle? I see on Ebay only have few Metter.
Unfortunately the place I got it from isn't selling anymore, but you can find some more vendors here: goo.gl/FuBi07 Just make sure it's pure nickel. If a kg costs less than about $60, it's probably nickel plated steel.
i like ur step by step vidz good job bro i learn from it thanks
Before welding your batteries in parallel maybe you should mentionne that they should be charged at the same voltage. No?
He already mentions that at the beginning of the video. When he’s checking the voltage of each battery
where do you buy the jig
when testing if your nickel strip has a steel core why don't you use a magnet
I Bought 200 litokala LG batteries and noone of them are 3,6v.
Some was even down to 3,2v
Hy!
I really like yours videos, you make a good work and you are a professional of Li-Ion batteries!!
I started also to do my only batteries pack for a project and i bought the same spot welding like yours from Bangood.com but i have a little problem, it seems it can not weld the nickel strip 0.15 8mm.
Could be because i use the strips that they sent to me and its not a good quality or it's the spot welding!
Thanck you.
Hi ebikeschool can ye give me some info please
for nickel is 99.98 ok?
Does anyone have this spot welder ? Its 95 bucks on Aliexpress and I'm tempted to purchase ... He's using it, does anyone else have it ???
great work! thank you!!
I don't think I want to buy a spot welder since this is probably the only time I will use it
Why do you RUclipsrs have the need to put annoying music in the background I don't get it
Me interesa tus videos y tus compras pero no sé inglés soy de argentina mejor si son traducidos
Hello again, learnt alot from this video, i have a question about the last part of the video about the nickle strip, my battery will able able to carry 20 amps max current. when u say 15amps on your controller, do you mean 15 amps continuous current? i want to make a 10s4p battery, using this bms:
www.aliexpress.com/item/10S-15A-BMS-for-36V-li-ion-battery/1195130789.html?
would it be okay to use 1 layer or nickel strips, or should i just add 2 layers for extra protection. thank you,.
The controller has a max current of 15A. So if you are riding full throttle up a hill for a long time, the battery will be seeing a continuous current of 15A (for as long as you keep it under full load). The BMS doesn't have any effect on controlling the current that is coming out of your battery. The 15A rating on the BMS you linked to just means that it can handle 15A continuously without burning up. If your controller is a 25A and you run full throttle up a hill for a long time, there's a chance you'll burn the BMS. It's the controller that decides how much current is flowing out of your battery, so I can't answer the question about the number of nickel strips without knowing what controller you'll be running with.
thanks, but how do i know what my controller will be running? what is a controller
i will use this battey: www.gearbest.com/batteries/pp_399862.html in 10s4p, with that bms. is it okay?
Yes, those are Samsung 25R cells and they are quite good.
A controller is an electronic speed controller. It's usually a silver or black box with many wires coming out of it on your bike somewhere. Do a search for ebike controller and you'll see.
i see now, the esc is 60A Continuous Current, and 300A Peak Current Limit. Voltage rating of components 8V-50V, Compatible battery 3S to 12S, Recommended 10S battery. However i want to use 2 of these esc with the 10s4p battery
Thank you !
Yes I enjoyed. But technically adding more strips doesn’t actually give you more amp carrying capabilities. (Kind of) if you’re working the current at close to maximum output (in comparison with the nickel strips) (that and I didn’t look up the maximum output of 4 cluster batteries) it’s a matter of the weakest link. Check out some videos on parallel resistors. (Same thing)
perfect