Over the course of many years, I have visit the Tesla electric automaker showrooms, and learned from the Tesla employees that love to share their vision and philosophy of efficient transportation. On every occasion and at many different Tesla showrooms, when I asked how I could learn more about electric vehicles, your KZread channel was the first and only channel mentioned, with great enthusiasm. You are a major influence in educating everyone that wishes to learn more about electric vehicles and batteries. Thank you!

Thanks Jehu! Just replaced the BMS like you instructed and now it's powering my converted hybrid bike. It's a front wheel hub 500W 36V/48V 22A conversion kit. I weigh 175 lb and the controller limits me to 20mph. Did a full test yesterday and got 20 miles range with small hills in Austin, TX. I started with 42V and then it shut off at 32V. At $72 with shipping, what a great value. Wish I could justify buying 4X or even 6X right now.

@jehugarcia

4 жыл бұрын

Wow 20 miles

I was getting ready to restore some ebike 36 volt battery packs for my brother-in-law, and this was exactly the right video at exactly the right time! Thanks a bunch!

I'm planning an E-Bike conversion making my own 13S 4P 48V pack from two of these, just using the cells and holders and a BMS. That wiring would be excellent to see laid out...

Very tempted to take this approach. Little puzzled with this method being that if not testing and labeling each cell. Like this approach for being cheaper. And easier. No special equipment to buy. Such as a 5x kit or a spot welder.

Amazing video! I love this kinda stuff! You got me wanting to make a power wall to charge my e-vehicles from solar. Then the rides will truly be free! Thanks for making this content and sharing it with us viewers!

I was able to get the BMS which comes with the batteries to work with some reverse engineering! Edit: Tutorial here kzread.info/dash/bejne/c52Lmcd6kdLQZcY.html Tl;dr you need to short pin 3 of the S50085 switch chip to ground with a ~1k resistor to enable the output. The cell balancing and protections seem to be always on from my testing, but I will do more research to see if there is a software solution instead of adding a resistor. The BMS looks really well built and has triple redundant current sensing and CAN bus output (potentially allowing you to track cycles, cell voltages, and actual pack capacity etc) and many times redundant low battery protection. The switch this resistor bypasses is separate, so I think this is a safe fix and will not disable protections, so I will use it for now but no guarantees.

@ErikMeike

4 жыл бұрын

It looks like the BMS actually fully turns on and sometimes allows charge and discharge if you connect LINK_A and LINK_B pins on the small wire headers at the end of the BMS board with no other modifications. When you do this, it also outputs messages over CAN which I haven't been able to decipher quite yet.

@nhannguyen-sr9vh

4 жыл бұрын

awesome can you please post photo or video of how this works.

@ErikMeike

4 жыл бұрын

I can probably post one this weekend. I am a bit busy during the week.

@yanmingpeng645

4 жыл бұрын

unable to duplicate the trick due to S50085 chip does not have +V on pin 4. you need to do something to turn on the MOSFET Q12/Q14 to power the S50085.

@ErikMeike

4 жыл бұрын

@@yanmingpeng645 You need to charge the battery first through the BATT+ and BATT- connectors to get it to wake up. I hopefully will have the video out tonight. I have everything filmed and am just editing.

greetings man,, I'm new to all this and nervous working on something that could burst into flames I don't feel so nervous now as I've seen your method and it makes sense to me thanks a lot and good luck with your power wall

These are PERFECT for so many things!

GREAT stuff! I'm interested in building a power pack like the "Better than a kodiak ". I'm new at this and wanted to know if you have any wiring diagrams or drawings I could have to get me started?

Thanks for sharing your time I would appreciate it very much if you slowed down your fast forwarding by half I am not that clued up with these subjects but do enjoy watching them, love all your vlogs thank you.

These are awesome I just picked up 5 packs yesterday from you. Think I could practice on regular C batteries? I'm using a SUNKKO 788H-USB for the first time and don't want to burn my cells.

Sir kindly specify the schematic diagram for that 36 volts.10s bms .if you will show the diagram so that i can easily follow .thank you and more power to you

Hi Jehu were can you get the Hall sensor from that your using in the video great job thanks

Let me ask you a question. I have a new battery for my scooter ,the old battery had some water damage. So, could I (when the new battery is no longer in use) use the new battery BMS and my older battery calls (or packs?). Since the circuit boards are the only thing that was damaged? Thanks!

Hey, could you make a video on how to debug a battery pack for anyone who wants to fix it by themselves? I have a battery charging issue, which is really frustrating because the battery pack itself still works when I put it on my scooter. Thank you!

You have a good price on these packs. I just wish you shipped to Canada.

What is the best connector for a 24v 12ah lipo pack that will work great for charging and is weather proof for my project ? I hear the connectors melt if to much current is used so what's the best weather proof connector that won't melt even if under high load

Is it possible to use the original bms to charge the cells for the first time and get them balanced with each other?

What charger do you use or recommend for 18650's? Preferably a 4bay

Can u plz explane how to calc Amps for the BMS? Cant really find anything about it! Have 10s6p 36v 17,2amp. Is it that easy that you go fore 17,2 or is it max disscharge I dont know??

You should show a 7x pack done as a 24v system. That would be the bomb for us micro-solar guys.

@peterg.8245

4 жыл бұрын

He’s done tons of 7S packs

@geoffreycintron4471

4 жыл бұрын

@@peterg.8245 Yes, but 7S with 7 of these 40packs is what I want to see/try.

@geoffreycintron4471

4 жыл бұрын

@D theman Yes, you break the pack down flip all the batteries in one direction and reuse the cell holders. basically just turning each pack into one battery. so 7 packs in series would be a 7s. For me this would be perfect for a micro 24v off grid solar system.

Seems like a lot of work or is it just me, I keep breaking the terminals off that series can those be solder to the strips? I’ll have to repair the ends

How many would I have to use to run my 36v golf cart?

Will this new version be available on your website???

Can you put a link to a BMS that you would recommend? The BMS link you provided is no longer available. Thanks.

I want to make a battery pack for a razor scooter or electric scooter with my packs that's my goal but I'm not sure if my packs can handle the power draw without bursting into flames gmb is where they where made in july 2011 they are 6000 mah 3.7 nom pouch cells

Will you sell individual HP PCB board?

Got any links to bms that are available? 10s 25 ish amp max? Thanks

Hi . On my scooter the BMS needs to communicate with the scooter . There is only a power lead how is the BMS communicating if no physical wire connection other than the yellow connector and charge cable ? Btw the rear light connects to the mother board . Some mother boards allow a yellow and green cable to connect from the battery to the mother board ....is this cable giving the mother board the required info ? Regards Don

Like others on here I’m wondering- where are the charging leads?

Where's the charging leads

What's the blue wires for

Where to find quality lithium ion cells in europa?

Where can I find that bms?

jehu please learn us how to make a battery pack with SMart Bms Level 2 charging , so you can charge on 220v or please just make a live video to talk how to DIY fast charging ,how to charge at tesla supercharger

so if I get 4 packs I'll have a 10s-16p correct

Jehugarcia, i have an electric bycicle, battery îs 36 V, 220V charger îs 42 V output. I would like to charge The battery from three solar panels în series, maximum open voltage can be 62 V max, îs it too much for my battery? Will it fast charge, will it brake? Can you help pls.

WAY better than massively overpriced VRUZEND caps (made in india from garbage) that are guaranteed to crack and lose contact. Micah Toll calls Vruzend a company but runs it from the checker board floor of his parents attached garage in Florida.

Mine are out for delivery

I have 36v 30,000 mah battery,it's a scooter battery .what amp BMS do I need

How can order

Do the cells need to be charged separately, or do we just remove the old BMS and add the new one?

@peterg.8245

4 жыл бұрын

The BMS should balance the pack by putting resistors in line with higher voltage packs

@itravel1177

4 жыл бұрын

@@peterg.8245 Thank you.

WICH SPOT WELDER FROM AMAZON OR OTHER WILL YOU RECOMEND THE MOST FOR 18650 PACKS?

@MikeSmith-ig6iw

4 жыл бұрын

K weld look up on you tube plenty off videos

LOL, You gotta stop doing this when I have some chump change in hand. 8 ordered. Thinking 40P 7S . If my cell numbers prove as good as those 3Ah or so, 120Ah. Not bad for the price. 2.8KWh.

You can simply wire the BMS to manage charge only- bypass it. They are nothing but power hogs anyhow. They're useless. At best, you need a balancing circuit.. I rode 20 miles on my electric skateboard with no BMS a couple of weeks ago, and I came home, and manually measured the cells. Each Samsung 40T was exactly 3.51 volts, which if I'm not mistaken, is the the same storage voltage they set at the factory. Not even 1/100th of a volt of deviation in the cells. That's not to say cells can't become out of balance, but if you use the newest and the best cells available, and you don't directly solder to your batteries- you can run them without a BMS so long as you periodically check and make sure there's 0 deviation. The conditions for charging things like electric skateboard batteries are less than ideal. Especially when you exceed 6s- there's just no external lithium charger/balancers on the market that do above 6s. It would be ideal to simply have a waterproof balance lead terminal/connector on the side of your battery compartment you could just plug into something like an IMAX B6 (B12, lol) that accepted 12S. There's more room for growth in the light electric vehicle sector than just about any other I can currently think of. People are taking these things for granted. I have a freaking skateboard I can pick up with one arm, and carry it in my house that can literally carry me 25 miles on a single charge. That's disruptive technology.

I literally just replaced the BMS on my Electric Scooter battery as it died thanks to water ingress. Replaced it with a Daly BMS.

Sup jehu. Been following your vids for two years. Normally somewhat informative. Why you recommending those craptacular bms units? It caught fire, and almost burnt my barn down. Is there any what are legit?

@jehugarcia

4 жыл бұрын

That particular model?

@mike-ph3fk

4 жыл бұрын

@@jehugarcia Unfortunately, yes. I tried using that one, and a bluetooth compatible one from a site I believe was called elecycle. The one from amazon began smoking, after a brief period of time, so that was a no go, and the bluetooth enabled one just quit working after 3 charge cycles. Been trying to find a reputable for almost a year

Built 1 battery with suggested BMS and I'm trying to drive a 500W ebike motor. Doesn't have very much power at all. Not sure what's going on. BMS states it's capable of 25A discharge rate (Nearly 1000W) but my 250W mini ebike has way more power with a smaller battery. Pack charged up to 41.5V.

@jehugarcia

4 жыл бұрын

Measure it, might be your scooter

Recommend any other website with international shipping ?

@jehugarcia

4 жыл бұрын

There isn’t any

@andrewoneill5003

3 жыл бұрын

I know a guy in Canada who uses a freight forwarding service.

I just want to harvest the cells from the one pack I bought. Impossible without shorting the whole thing as far as I can tell. Has anyone been successful dissasembqling these?

Hi. I sent you an email to the one in your youtube profile with alot of information about those batteries, please take a look at it and please reply with any question as i think we can work it out to get those batteries working as they are without removing the BMS.

@ericstephenson9924

3 жыл бұрын

Hey! Is there another forum where some of this info might be posted?

@RicardoCerveraBlanco

3 жыл бұрын

@@ericstephenson9924 No, i been looking for more info and got stuck... but don't worry, this lame Jehu has cracked all on his own and will not only sale you the necesary for you to wake up the battery but he will also get a tax on for doing all the work without others help... No glory for other... right?...

where to get these batteries?

@jehugarcia

4 жыл бұрын

On the link

Bypass the discharge

مرحبا اخي العزيز

Всем привет

so if one wanted to make a 72v pack from 2 of these they would just hook them up in series and then use a bms like this and add a negative and positive wire to the opposite ends? www.amazon.com/Lithium-Battery-Batteries-Integrated-Circuits/dp/B0822VC912/ref=sr_1_6?dchild=1&keywords=72v+bms&qid=1593658228&sr=8-6

BMS = Battery Management System. For noobs that will chance upon this video later.

Hi Guys, I have a friend that lives in the Santa Cruz mountains. He is getting married soon and as the best man i would like to gift him a bad ass portable battery solution. I need it to be able to charge via solar and 120 V AC. Would also like for it to be able to run most of his equipment in his property. Any video or forum of a project worth following?

@Terryokie

4 жыл бұрын

Hi Alex, Have you tried Jehu's powerwall Facebook group? Good luck with your projects! facebook.com/groups/jehusDiYPowerwalls/

@AlexRuvalcaba91

4 жыл бұрын

@terryokie I forgot about the FB page thanks. 😁

I think you could have made a 2 minute video and still show almost nothing , and explained less

@jehugarcia

2 жыл бұрын

I’m a master at it