I am very DIY, but your solution is so clean and well thought out--and I didn't want to order from several different places, etc.--so I just ordered the turn-key unit from your site. Thank you for all you do for us DIYers. I have built several 48-volt LiPo battery banks based on what I've learned from your channel.
Thanks for all the videos, I made a solar charger trailer for my ebike but I only have a max of 90W (3x30W pannels) that I run in 12v setup. I use 4x 12v lead acid in parrellel and need to remove weight.After building and realizing I was over weight I thought I checked the price of lithium and pooped myself, thought it was hopeless for me. Thanks to your videos and site I just need to save a bit and build some powerbanks better then I thought I could get. My solar setup over charges my lead acid and a bit over amps, best conditions I get 6amps. Will be nice to have something that can actually eat 6amps.
Can I use this as a drop in replacement for a server UPS 12V lead acid batteries? Or will I need to change the UPS electronics? Or do I need to replace UPS electronics with a charging circuit that has constant current, constant voltage electronics? Suggestions? Thank you for your great video.
Hello @jehugarcia , appreciate for sharing your knowledge. I just received this 12 v battery exact same bms is on the way. can I get away using the bms without the extra board? I guess question is if I attach the bms on the side, and use small wires to connect to the pins on the battery. main discharge leads will be same leads on the battery right? some other BMS's have bigger wire for leads. but I don't see any big lead wires on this BMS.
Yes you can, you’ll have to figure out how to connect it, use cable sized correctly for your load, small loads can use small cables but big loads require big cables
I love the clean design. Is there any concern that these cells specify 3.5v max when typical Lifepo4 cells are 3.65v? Maybe a configurable BMS could ensure the cutoff is set to 3.5v to accommodate these.
not really, we are testing charging these cells up to 3.8v and it doesn't seem to be a problem, you will probably loose some cycle life but it seems to be minimal.
A few of us ordered the heltec bms from the link but they didn’t come with the screws and nuts. Do you know what size the nuts and bolts to attach the bms are?
Hey @jehugarcia, when using something like this to start a car, would you have any concerns about the BMS disconnecting the battery while the car is running? I've heard a bunch of RUclipsrs warn of a large voltage spike occuring when the battery is disconnected, which supposedly will "fry all the electronics". Is this a legitimate concern? It seems that any Lithium car battery running a BMS would be prone to the same problem? Which makes me wonder, do they run a BMS or not? I'm picturing like Antigravity branded batteries that are marketed for motorsports.
@@dh2032 i didn't ask the question, it was *tonyb9785* i thought it was a great question too but respected *Jehu's* for being honest. he doesn't know. maybe down the line someone will post the answer 👍
@@jehugarcia my real concern is to power with my EV conversion project of 96v.. (2packs - 48v in series) While the same pack I can tap during power outage used as 2-48v in parallel....
You really leaving the standoffs on the vehicle battery cable side that way? How long you see that board lasting when it’s constantly flexing from vibration? Those plastic stand-offs aren’t connected to anything and resting on top of the LiFEPo4 Bus bars… gonna be tapping away like a woodpecker.
Great project! I had the PCM made but none of the hardware links in the PCBWay page worked for me. Can any one provide the correct links to purchase the hardware? Thanks
Alguien que me explique cómo se fabríca una batería de 120v con LiFePo, todos los BMS que he visto son para 72v, how build 120 volts LiFePo? What BMS can use?????
You'd likely save money by building your own battery. If you bought this battery you're paying extra for the bms and also you wont be able to charge all of your batteries all at once, so you'd have to buy your own 72v bms and wire it yourself either way. If you're building an EV you likely will need many kilowatts of battery capacity.
Stop talking nonsense, years ago, we built electric cars with LiFePO4 that would put out 1000A. If the cell supports Burts of 600A then it will put out 600A
![Felix "Unfair" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/Oswujxm2Ag0/mqdefault.jpg)
PCBWay Project www.pcbway.com/project/shareproject/200A_12v_Lithium_Battery_BMS_project_e65e1606.html
do you or can you get a lit like this foe 280 amp cells
I am very DIY, but your solution is so clean and well thought out--and I didn't want to order from several different places, etc.--so I just ordered the turn-key unit from your site. Thank you for all you do for us DIYers. I have built several 48-volt LiPo battery banks based on what I've learned from your channel.
I dont see it on the site?
Beautiful modular approach. So clean. Keep these videos coming.
Thanks for all the videos, I made a solar charger trailer for my ebike but I only have a max of 90W (3x30W pannels) that I run in 12v setup. I use 4x 12v lead acid in parrellel and need to remove weight.After building and realizing I was over weight I thought I checked the price of lithium and pooped myself, thought it was hopeless for me. Thanks to your videos and site I just need to save a bit and build some powerbanks better then I thought I could get. My solar setup over charges my lead acid and a bit over amps, best conditions I get 6amps. Will be nice to have something that can actually eat 6amps.
My Mexican brother. I love your videos bro. Keep up the great work. Jamaican guy here in Houston, Texas. Love you man!!!
Can I use this as a drop in replacement for a server UPS 12V lead acid batteries? Or will I need to change the UPS electronics? Or do I need to replace UPS electronics with a charging circuit that has constant current, constant voltage electronics? Suggestions? Thank you for your great video.
Hi please prices bms end link to bms
Hello @jehugarcia , appreciate for sharing your knowledge. I just received this 12 v battery exact same bms is on the way. can I get away using the bms without the extra board? I guess question is if I attach the bms on the side, and use small wires to connect to the pins on the battery. main discharge leads will be same leads on the battery right? some other BMS's have bigger wire for leads. but I don't see any big lead wires on this BMS.
Yes you can, you’ll have to figure out how to connect it, use cable sized correctly for your load, small loads can use small cables but big loads require big cables
The capital p in “OutPut” is killing me 😂
What do you recommend to build a 36 volt golf cart battery to replace six, 6 Volt Trojan Lead Acid batteries ? Thank you. Great videos !
Am I wrong in thinking that the cathode is generally negative and the anode is positive?
just looked it up, apparently it depends on context. meaning they can be either.
Depends on if you are charging or discharging (From a electrochemical perspective at least)
That is what my training and 45 years of experience tell me as well...
@@yestrep333 If you check the voltage on a battery that’s at rest it’s normally the anode that shows a higher voltage compared to the cathode.
@@terminator8220 Where did you find this info? Any url?
Voltage does not leak. Current leaks.
Where do I get the ribbon cable with connectors?
Well thought out and executed.
A box would clean it up. What do you have?
What would you recommend for charging this battery?
Hello sir , I hope all is well ! I don’t know if you remember me I won that 3.5kw metal power box all the cells went bad
I love the clean design. Is there any concern that these cells specify 3.5v max when typical Lifepo4 cells are 3.65v? Maybe a configurable BMS could ensure the cutoff is set to 3.5v to accommodate these.
not really, we are testing charging these cells up to 3.8v and it doesn't seem to be a problem, you will probably loose some cycle life but it seems to be minimal.
Thanks! That's good to know. I'll be looking at ordering one of your kits. Appreciate the info on these cells.
Hi, What software is used for designing? Thanks
Love your show. Totally get what you are doing here. I am asking about a temperature sensor here. Not getting much from the manufacturer.
The BMS does not seem to have a temperature sensor?
Correct
A few of us ordered the heltec bms from the link but they didn’t come with the screws and nuts. Do you know what size the nuts and bolts to attach the bms are?
You mention M5 but you have the length
May I suggest, that you dumb it down a bit more. What about "To Battery", and "To Car", ect? Love what you do!
and where is the yellow data connection to the battery going? that make my BMW accept this new battery?
A custom BMW BMS likelly, these are raw cells, no BMW hardware
Is it very sunny in your workshop?
It’s always sunny in California
Hey @jehugarcia, when using something like this to start a car, would you have any concerns about the BMS disconnecting the battery while the car is running?
I've heard a bunch of RUclipsrs warn of a large voltage spike occuring when the battery is disconnected, which supposedly will "fry all the electronics". Is this a legitimate concern?
It seems that any Lithium car battery running a BMS would be prone to the same problem? Which makes me wonder, do they run a BMS or not? I'm picturing like Antigravity branded batteries that are marketed for motorsports.
No idea
@@jehugarcia *Thanx for the Honesty*
@@fvrrljr good question, have luck in finding your answer/solution else where, or none starter/bad idea, to even do, for the reason suggested
@@dh2032 i didn't ask the question, it was *tonyb9785* i thought it was a great question too but respected *Jehu's* for being honest. he doesn't know. maybe down the line someone will post the answer 👍
This spike could be taken care of by simply adding a capacitor to the system
Hey man, great videos but hoping to see you select lower cost alternatives to BMS with low temp cutoff for folks who need to charge when temps drop.
They don’t exist, those bms units cost $100-$200
What's the power of this battery in Ah is it used for solar storage and can i charge it directly from 12 volt panels
74Ah, you will need 18v out of your panels I believe
Hi what is the bmw model car have that cells ?
NIce, can I make 51v Golf Cart LifePO4?
Can a have a bunch of these sa 4 to build a 48v pack and charge with 48v?
Nice build..
Yes. ruclips.net/video/ySBtJOR2x-4/видео.html
@@jehugarcia Thank you for your confirmation..
@@jehugarcia my real concern is to power with my EV conversion project of 96v.. (2packs - 48v in series) While the same pack I can tap during power outage used as 2-48v in parallel....
Why no one board instead of two?
Yes
ur big fan sir ❤ very informative videos love from pakistan
You really leaving the standoffs on the vehicle battery cable side that way? How long you see that board lasting when it’s constantly flexing from vibration? Those plastic stand-offs aren’t connected to anything and resting on top of the LiFEPo4 Bus bars… gonna be tapping away like a woodpecker.
I’ll put the holes in the next batch of busbar boards, i order in small batches in the beginning since the designs iterate fast.
some of these can work a portable welder
Would be pretty cool to do an LTO version that can charge low like lead acid etc. (and massive C rating)
as a complete drop in replacement for lead acid etc
Why could you not use these cells as a direct sla replacement if temps are above 0°. 600 amps should be enough for most gas engines.
@@brenthawkins204 You could, but if they go below 0C you're going to have a bad day because you can't put a BMS on it. LTO are almost indestructable.
Is this battery assembled still available from you
yes these should be links to it on this video
Why are you using this BMS ? Specs show Overcharge is 3.65v±0.25v and Batteries voltage range is 2v-3.5v, seems a bit unsafe.
Nope, LiFePO4 can charge up to 4v safely, all LiFePO4
Hi, the link for the cells is broken, can you fix it?
I just checked the link, it’s fine j35.us/LEV60f
@@jehugarcia it redirects to an admin page of the website
Got it, I just changed it jag35.com/products/high-discharge-600a-lifepo4-1780w-prismatic-cells
Great project! I had the PCM made but none of the hardware links in the PCBWay page worked for me. Can any one provide the correct links to purchase the hardware? Thanks
What do you mean they don’t work?
Dear, please share where this BMS buy. Thanks in advance.
Yes
Bro don’t knock the socks 🧦 😂
Alguien que me explique cómo se fabríca una batería de 120v con LiFePo, todos los BMS que he visto son para 72v, how build 120 volts LiFePo? What BMS can use?????
pone dos bms de 72v en serie :)
@@picanazo420 no sabía que eso se podia hacer
link for BMS ????
In the project page
You are the man.
Cool.--From BMS Factory!😊
Thanks for coming
make it 48v
There jag35.com/products/48v-16s-busbar-pcbs-for-lev60f-cells
👍👍👍
Dang it. I thought this had something to do with BMW
These are BMW cells. Did you want a BMW car video?
Can we make 48v with this?
No. He's got a video for that though. ruclips.net/video/ySBtJOR2x-4/видео.html
Can I use this battery in EV Car?, I Have a vw converted to electric, and need 72 volts, Can I connect 6 of this bateris in serie?
Yes
You'd likely save money by building your own battery. If you bought this battery you're paying extra for the bms and also you wont be able to charge all of your batteries all at once, so you'd have to buy your own 72v bms and wire it yourself either way. If you're building an EV you likely will need many kilowatts of battery capacity.
although your circuitry design can take 600A... but LiFePO4 cannot, they will overheat and utimately pop.
Stop talking nonsense, years ago, we built electric cars with LiFePO4 that would put out 1000A. If the cell supports Burts of 600A then it will put out 600A
He must not have seen your video of it going past 600amp.
I can't solder for the life of me.
💯
drug Downey ???? lmfao
How many amp hours?
Each cell is about 74aH
@@SunsetSlimess is that considered one cell? Or 8?
@@MrTruthAddict 4 cells in series makes a battery that is 12V and 74 aH. If you use 8 in series, it would be 24V and 74aH.