Do you NEED a BMS for DIY Li-ion Batteries?

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Learn how to make your own battery with my book DIY Lithium Batteries: amzn.to/2jbxvzS or check out my second book - The Ultimate DIY Ebike Guide: amzn.to/2BGx4Fn
The gear I use for my videos:
Camera - Nikon D5300: amzn.to/2DcuVlM
Lens - Tamron 18mm - 270mm: amzn.to/2qLZlsG
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Here are some of the products I use:
Bafang BBS01 kit: goo.gl/VxhTHu
Bafang BBS02 kit: goo.gl/9cfWfk
Bafang BBSHD kit: goo.gl/dWX2pm
250W complete e-bike kit: goo.gl/7HSQye
500W complete e-bike kit: goo.gl/xWPgtj
1,000W complete e-bike kit: goo.gl/UdUWK9
36V 13Ah Hailong (shark) battery: goo.gl/K9PsuC
48V 15 Ah triangle battery: goo.gl/6zjneY
52V 17.5 Ah triangle battery: goo.gl/e1E8ug
All ebike batteries: goo.gl/7pAi9Z
All 18650 cells: goo.gl/hYWnwU
Xiaomi QiCycle: goo.gl/Ys6JTZ
500 Wh folding e-bike: goo.gl/UWgoJU
Weird suspension folding e-bike: goo.gl/T9xBqN
Segway ES2 scooter (AliExpress): goo.gl/32szNF
Segway ES2 scooter (Gearbest): goo.gl/25URD9
Xiaomi M365 scooter: goo.gl/iEQWJw
100W Flexible solar panel: goo.gl/jK1CSB
100W Folding solar panel: goo.gl/WnHmgY
Cycle Analyst: goo.gl/RsmE3N
The parts that I use for building batteries:
18650 cells: goo.gl/aEabAQ
18650 positive insulating washer: goo.gl/HBVOuc
Nickel strip: goo.gl/VIrNQq
Spot welder: goo.gl/KN3Uaw
BMSs: goo.gl/S6gSQx
Silicone wire: goo.gl/xmpbKD
Black 18650 cell spacers: goo.gl/hQxWF6
Vruzend cell spacers: goo.gl/5ReLqA
Large heat shrink tubing: goo.gl/6v1ow9
Small heat shrink tubing: goo.gl/OU3Z6u
Foam sheet for protecting battery: goo.gl/5e71tE
Kapton tape: goo.gl/D6BT57
Chargers: goo.gl/js0T0V
**Question response book giveaway rules**
When you guys asks questions in the comments of my videos, I'll try to answer them. If there are questions that I think would make a good video response, I'll choose them to do a longer segment. If I choose your question for a video response, you'll win a copy of my book The Ultimate DIY Ebike Guide (the paperback or the ebook), or my book DIY Lithium Batteries.
Here are some things that RU-vid makes me say: This contest is not sponsored by RU-vid and RU-vid isn't affiliated with it. I'm supposed to provide a link to the community guidelines for RU-vid (ru-vid.comcommunity_gu.... RU-vid is not a sponsor of this "contest" and by participating, you are releasing RU-vid from any potential liability, whatever that might be. Privacy notice: I won't steal your info. If you do win, you can choose to send me your address so I can mail you a paperback copy of the book (or some other prize if that changes) or you can send me an email address and I'll send you a copy of the ebook. I will do everything in my power to immediately forget your personal information afterwards.
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22 май 2024

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Комментарии : 545

@bp5082 3 года назад

100% of failures I have had have been due to the bms. E boards, e bikes, builds or that I've bought. When you buy a battery pack eventually it fails let's say 3 months. You will think you got it wet and you buy another thinking you were at fault then the new one fails. Eventually you will get really mad, then you take off the shrink wrap check all the cells, everything seems good then you inspect the bms and you see aluminum oxide and sometimes burns. At this point you get really angry due to the money you have spent. I don't think anyone has designed a pack that cells can be released and put back quickly and charged completely. Anyone who reads I hope it helps. It's not your motor, it's not your speed controller, it is the bms. If you are loyal to bms units you will be walking home a ton. I highly recommend you not use a bms and charge each cell individual with an 18650 charger-i have 3 exakt chargers and I can charge every cell to its fullest capacity quicker than with a single charger and pack. E bike school has great Vids if your just starting and I hope this comment helps someone, I would have save a painful large amount of money if I had read a comment like this one. Cheers

@michaelaugust7233 5 лет назад

All of your videos are not only spot-on informative, but awesomly entertaining! Thanks, great help.

@fransahm1956 5 лет назад

I just ordered my first ebike and I am getting ready to build my old bike with a front wheel kit. Now I am considering building my own battery for that project. Thanks to your channel.

@nettoyageadriance 5 лет назад

It's amazing how big the world of batteries and bms is. Thank for opening that up to us!!

@JH-pf6cd 3 года назад

Great vids

@jeremydewayneellis 5 лет назад

Great video micah "to bms or not to bms"😂😂 my favorite part!

@venkateshagopalgopal4532 2 года назад

With such a detailed, humble explanations we don’t find any alternative except start loving you!

@asbjrniden3621 5 лет назад

I have resorted to doing both, as I was paranoid I connected both bms and balance wires on same battery and have compared the charging voltages of both. Happy to say that the bms has done a great job, only straying one hundredth of a volt at times after charging, but I like the convenience of having the balance wires as well for easy checking what is going on.

@bryancunningham1095 6 месяцев назад

I think the added balance wires in addition to the BMS is a great idea, wouldn't be much added cost but would give us a look into the sealed battery to periodically check.

@gabriellaalvarez2527 5 лет назад

Great video! Thanks for teaching about the intricacies of BMS’s

@JUANRAMONROBLES 3 года назад

Tu usas ebike?

@agmendoza2830 5 лет назад

I built my first battery by following the instructions from your videos and used all of your components . I really like the idea of having a BMS monitor the batteries for me. Keep up the good work.

@anasmoustafa7286 9 месяцев назад

Was it easy to use the BMS ? kindly advise which manual or video did you use to handle it ..

@agmendoza2830 9 месяцев назад

@anasmoustafa7286 same components he used in the video I used and I just watched another video to install it

@haulngrassracing 5 лет назад

I’ve used BMS’s (and even bought a few off of your website) but I’ve found that no matter how much I spend they usually fail sooner than later. Now I have a battery voltage gauge and a cheap volt buzzer that is set to the lowest I want it to go and shows me the voltage of each group and how far they differ from each other. Plus a balance charger. Great video Micah!

@EBikeBuilder_ 11 месяцев назад

agreed , the BMS always seems to fail

@TheGbow0704 5 лет назад

Thanks for all your vids on Lithium batteries, I bought your book on Lithium batteries and it has been very helpful

@keithballard4621 7 месяцев назад

There is one other option;I use individual cell chargers for each cell. I place them in series in a pvc pipe with threaded end caps . The caps are drilled through the middle and small bolts inserted to contact the - + ends. Wires are then connected with appropriate connectors for easy removal. When the display shows a low symbol, one end cap is removed and the cells are removed with a telescopic magnet.They are then individually charged in the chargers( 4.19vdc). The whole process can be done in under five minutes. It’s not necessary to do this for every charge if matching cells are used to begin with, and they can be charged within the tube with a regular, multicellular charger. I think the extra two minutes to extract and replace them for individual charging is worth the effort for peace of mind.I suggest using button top cells for this method, but have also used small magnets to secure the connection between the cells. I have considered spot welding nickel disks the positive ends also if non button end cells are used. They just need to protrude enough to still slip in and out of the individual chargers without a struggle. The double cell chargers are cheap but reliable for years. They charge a variety of cells and automatically recognize each type. They can be adjusted individually for either 500 or 1000 ma each cell has a digital voltage display as well as blinking bars to indicate active charging. They will not charge over- discharged or defective cells.Works for me, but I’m not picky.

@andersonwilliams402 5 лет назад

Always concise and informative. Thanks for freely sharing such useful info.

@tomodeable 4 года назад

Great work Ebike school, all/any of your book will be of great help to me. Pls continue the good work you are doing.

@Begontom 4 года назад

Nice straightforward video full of good info, Thanks Mika.

@powerofdreamx 3 года назад

Best description of what a BMS does and alternative solutions!

@Taiwan_Prospers_with_China 3 года назад

Another important feature of any good BMS is current overdraw protection which is equally important in maintaining the health of your battery pack.

@KraXed112 5 лет назад

This is all good info, I’m tempted to make a battery for my Onewheel

@j.vincent3625 3 года назад

Thank you for pacing all the details of the info. Your information is very helpful cuz you demystify how things work. I do believe even i would be able to construct a lifepo4 battery for my power needs, but first I'm gonna view more of your vids. Thanks again.

@Bluecuban71 5 лет назад

Thanks for the information , I use a form of BMS on my lipo batteries for all my R/C crawlers and racers , but my Venom Pro 3 does all of it for me . I think I'm upgrading to the Venom Pro Quad Charger next . Im going to start looking now for a charger that will do it all for the E-Bike I get !

@ehvway 2 года назад

Thanks a ton for this clear explanation. I just bought a balanced charger to start making my own battery packs

@veyronel 5 лет назад

Wow! truly a fantastic advise on details regarding BMS!

@kyleniedermeier6651 5 лет назад

Always so informative! Thanks, Micah!

@sebastiandeleon126 5 лет назад

That was a very clear and tidy explanation, thanks!

@10661956 5 месяцев назад

On my OpenPPG paramotor, I have elected to only use my BMS for charging and then monitoring my voltage to decide when to setup for landing.....usually around 80 volts on my 24S battery. Using the BMS to monitor discharge, the BMS has failed me 4 times resulting in battery cutoff and emergency landings. (BMS units will eventually fail.....to me, that is unacceptable in aviation.) I do use an active balancer though that works 24/7. It is mounted inside of the battery....works great! Like you stated, everyone's situation is different. Thanks for posting this video. Bill

@leshyborovoi 5 лет назад

Great video with lots of info on a crucial subject!

@chrisackert8774 5 лет назад

Great video, I had finally decided on balance leads. but now I'm thinking I might put in both a bms and balance leads for periodic checks.

@andersjohansson6639 3 года назад

Thanks for a very lucid presentation.

@dreamkiss4u 5 лет назад

nice examples to give everyone about the differences thanks for your work on your video guides ;-)

@praxabora1 4 года назад

Hello, Thank you for this helpful video! Can you tell us a few good commercial BMS options for 12V batteries, please?

@westbourne1956 Год назад

This is a great Video, You explained it so well, I often wondered the two differences ,I was on the same page as you but for me explaining this to a friend it was difficult . So I just sent him your video. Great job

@renantecainta3043 5 лет назад

Great video! I will always choose to use a BMS for my 18650 battery pack. It helps protect the battery in overcharge and over-discharge. It helps to prevent damage and fire. :-)

@NexiTech 5 лет назад

I use smart BMS in my both E-bikes. It cost just little bit over the regular price BMS but they comes with USB and Bluetooth connectivity. I connect it over Bluetooth to my smartphone. Over the app you can set and monitor in real time so many things including speed that you travel, temp of battery and BMS, Voltage or see all individual cell pack, you can disable/Lock BMS like E-lock. You can see remaining range... It has so much useful info and you can set parametars over app and program it however you like. You can set discharge,charge limit, phase amps, capacity of battery, Discharging low limit, charging high limit and you can set bettery balance to charging only or all the time and so much more. Smart BMS are the best thing ever.

@celeb18 5 лет назад

Where did you buy from?

@NexiTech 5 лет назад

Dariusz Czarkowski Aliexpress. Just search for smart BMS.

@bobravenscraft5376 5 лет назад

A bms that can balance by Bluetooth has my attention cool

@trewmika1869 3 года назад

I have made loads of lithium batteries, and I always include balance port, even if I have good balancing BMS. It makes it easy to check if anything goes wrong. Sometimes the balancing is not included in the BMS, so I have to balance charge it. Anyway, if balancing is not included, the BMS should still be able to cut the battery off once one cell starts to overcharge.

@robertcetti6935 Год назад

Good explanation of what the BMS does.

@brianbaird6528 3 месяца назад

I personally use BMSs on all my batteries. However, you can do just fine with balance charging. To prevent over-discharge, I have heard of a gadget called a low-voltage cutoff, which basically watches the overall voltage of the pack and cuts off the discharge current when it gets too low. I don't really like this because cells may be very well balanced when full, but the one with the least capacity will discharge to a critically low voltage long before the others. If the others are still high enough, the overall voltage may appear okay to the low-voltage cutoff, and it will allow the discharge to continue. I like the voltage monitor this guy shows that's wired in the balance leads. It will be watching each cell individually. If a low-voltage cut-off could be found that watched each cell individually and cut off discharge if any cell drops too low, that would be great.

@lamasta1 5 лет назад

Great information as I prepare to build my EBike battery.

@mindouzhang3419 5 лет назад

hi,our company professional produce Ebike battery with BMS,we have 12v 24v 10-100AH.

@outdoors446 5 лет назад

Thanks for the info. I like the BMS

@stvcolwill 5 лет назад

Really good video. I appreciate your not going BMS only route!!! I personally went to the dark side (not extreme though). I have connectors that I've installed on my mega battery (ebike DIY battery 14s10p) that enable me to split my battery in two for charging... and I use an iCharger Duo.... so that I CAN keep an EYE on all segments while charging. I do appreciate your advice on installing segment alarms, they're pretty cheap and I honestly hadn't thought of that.... though I tend to hang out in the top 2/3rds of my battery's range (can't deal with the lack of power in the lower range). The biggest problem that I have with almost all BMSs is that I can't tell whether they're working ...most of them are just boards without any interfaces. I'm the kind of guy that would really like to see the progress or error codes or status..... and yes, I've now paid through the nose with the iCharger Duo. I do like my set up. the iCharger is small enough to pop into a small backpack with my iPad pro or MacBook. I keep a 750W power supply at home and one at work as well so I don't have to lug those around as well. I should send you a pic of my finished battery - been using it for a good while now. Thanks for all your help previously and keep the awesome videos coming!!

@TheronChaplin 5 лет назад

great explanation, thank you!

@venkat.gsurya6530 5 лет назад

Great video... Thanks... But I just have a few questions... I very well realize the importance of a high quality BMS but I'm running onnan absolute zero budget where every penny counts... It is wise to use two of the low quality BMS (cuz they're available only in multiple quantities) ? When you mentioned the Shelby's battery with two BMS... How can that be done... ? The connections?

@aitortugas17 5 лет назад

Nice video! Thanks for sharing!

@michaelepps6700 3 года назад

You answered my question. That's what I was looking for. Thank you...

@mechimichi 5 лет назад

Hi Micah. I am new into building batteries and just finished reading your excellent DIY Lithium Batteries book. I got a question. How do i wire a BMS if the charging and discharging connector is the same i.e there is no dedicated charger plug? Looking forward to your answer. Thank you.

@neutronpcxt372 5 лет назад

IMO, you are perfectly right. I use BMSes just to prevent over-discharge/overcharge. I just use them as an additional layer of protection, along with cell fusing, slight undercharging, voltage monitoring, using quality cells, etc.

@mindouzhang3419 5 лет назад

YES,IT CAN BE PROTECT BATTERY

@othmanskn 3 года назад

You can use fuses to prevent over discharge. Voltage alarms are better at monitoring voltages.

@ThanosSustainable 5 лет назад

My 1st e-bike battery was a 10s2p. I had soldered the cells and was waiting for a BMS. Started using it before the BMS was installed but a solder joint came off and one cell dropped to negative voltage. It only took a ride for this to happen. I always wait for the BMS to arrive ever since.

@wilfre1pr 5 лет назад

Good information to know. I will like to learn more about this!

@thehamburgrawr 5 лет назад

I'm just here for the free book ;) jokes aside, your videos have been critical to the planning phase of my ebike build! Keep up the good work!

@RPRosen-ki2fk 5 лет назад

Travis, congratulations. It looks like you just proved ... HONESTY is the best policy. :)

@niteshades_promise 5 лет назад

always such greatly appreciated info for the novice. im saving to get a rear hub motor but not sure which route im going with the battery. was thinking of 4 mobility scooter led acid batteries to save cost. 500watt and up would handle that extra weight? was like 20 or less pounds.

@martinpetrov8801 2 года назад

Good video mate, verry nice!Thank you!

@stackcruiser7 5 лет назад

I got a full laugh out of the BMS joke. I appreciate the humor.

@garolittle 5 лет назад

Great video as usual. I always use a BMS.

@Gracinda80 5 лет назад

You would be amazed at how many EV owners I know who think they understand what a battery is and how to manage it properly when they talk to auto electricians (many of whom are also quite inept) but totaly miss to understand it! This is the perfect video for all of them, EV owners and EV technicians alike. I would just add some graphics and schematics and voila!

@BrunoBostick 5 лет назад

I have lear a lot with your videos, keep doing the good job! (y)

@FrostGhost 5 лет назад

Another great video Micah! Really informative! My dolphin style 48v 11ah is dying on me after 2 years of heavy use! This time I'm not going to buy another one, I'm going to build one using the advice in your videos! I will be using a BMS!

@TonytheCarEnthusiast 5 лет назад

FrostGhost HD If your building your battery pack what do you think you’re gonna connect them with ? solder them or spot weld ? If your answer is spot weld then please try to buy the arduino one Micah reviewed because those sunnko ones are unreliable and don’t quite work right ! Tip suggestion : use battery spacers as the battery will be quite easy to build and will take you less time ! I tried connecting them with hot glue and i spent way to much time organizing them which made me go back to the using battery spacers

@FrostGhost 5 лет назад

Thanks for the advice! I was planning on soldering because I don't have a spot welder. But I will see if I can pick one up for a cheap price! Thank you

@TonytheCarEnthusiast 5 лет назад

believe it or not i made a spot welder using a www.ebay.com/itm/Spot-Welder-Time-Control-Board-100A-Updating-Current-with-Digital-Display/263416943097?hash=item3d54df91f9 and using the transformer from my failed sunnko spot welder

@TonytheCarEnthusiast 5 лет назад

Trust me if you buy the arduino one you will not be disappointed as it is very reliable and not as dangerous to your house. when i was using the sunnko spot welder my entire house’s lights flickered when i spot welded and I did get complaints from tenants for lights

@celeb18 5 лет назад

@@TonytheCarEnthusiast if you have that problem then you need some coil to smooth pulses. Get longest extension cord. I had 15 meter long. Roll it in circle and connect to your welder. Problem with circuit braker or filckering should be gone

@martintasker7306 4 года назад

another great video clear concise well done !! Kind regards Martin Tasker

@badgeofhonour 5 лет назад

Thanks for the Info's, great help..

@dr.strange5850 5 лет назад

I really like his tutorial. Now I am fully understand about BMS. Regardless your setup, always use BMS

@JBattler 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-pljSZcEwc8Q.html

@D60Ebby 5 лет назад

Great video. How about one on how you set up your work bench & work area.

@lesliegetz1848 4 года назад

Great content, thanks Mica.

@hansbachtold1966 5 лет назад

Hi there, I like you explanation. I want to modify my drill from NiCad to Lithium-Ion. Approx. 14 volts . What kind of BMS you suggest? Can i go for one off the cheaper once or is it not adviseable. What charger do i need? Would appreciate your comment. Greetings from Switzerland Hans

@briandhoward6137 5 лет назад

Great information as always. I can't seem to find information on how to do duel batteries, I'd like to be able to run on one battery at a time. The idea is to flip a switch to change batteries on the fly with out stopping. Can you make a video on how to do this ??

@alfredfeuerstein9517 5 лет назад

The safest way: use a bms AND use a voltage checker for each bank to ensure your bms is working!

@Kris57277 5 лет назад

That is exactly what i am planing to do

@tubularap 5 лет назад

@@Kris57277 -- Me too. For the peace of mind a BMS offers, and combine that with testing (and learning) what happens inside, after making the pack.

@JeffMoche 2 года назад

I just deleted my comment, because I just noticed yours, and that's exactly what I'm planning to do as well. I'm closer to a novice though, so I'm glad my thinking was correct.

@connectionlost1063 Год назад

You don’t need to be quite that stringent with li-ion cells as decent quality cells paired with a good quality bms that is spec’d correctly for your current draw requirements then the bms will way outlast the cells you plan on running it on. If you plan on building the slightly more juicy lithium polymer based batteries then this is a good safety net idea

@joaoncr 4 года назад

Thank you so much for your video! It is very informative. I would like to ask you which bms is better for a ebike battery, a common port or separate port? Woudl a separete port bms handle regenerative charging? Is it true that a common port bms can not deliver as much current as a separate? Would you be so kind and help me out here? I can not find an answer anywhere!

@jonathanbraud5648 5 лет назад

Been using lipo batteries with balance charging and has worked great.

@TonytheCarEnthusiast 5 лет назад

Jonathan Braud what lipo charger have you used and are you balancing 7 cells one time then 7 next ? i haven’t found a lipo charger that goes all the way to 14s

@jonathanbraud5648 5 лет назад

Anton Pepkolaj I’m using the turnigy TQ4 charger to do up to 6s. I just run packs in series to get desired voltage.

@stevenm9236 5 лет назад

Good information as always.

@carlstanley3814 5 лет назад

super useful as always

@kendrickapps674 5 лет назад

after using off the shelf cheap BMS's I decided to design my own with an arduino at its heart and where possible off the shelf components and premade arduino modules. this minimises smd soldering. It is not an all singing all dancing device it does just what I think it needs to do, there are other devices that can handle the missing functions IMO. would you like to have one to look at when it is completed. kendrick

@justfly2010 5 лет назад

Hi love your videos.. Could you please suggest how to use a Bms and what are your quality choice I am planning to build a battery for motorcycle which needs 12 volts and about 7 ahr thank you. I appreciate your help

@louisgabriels6333 5 лет назад

Thanks , this is a good video to understanding .💞

@e-bike 2 года назад

Good work well done

@jwb3034 4 года назад

Great Video. I have one BMS which cut off my battery power supply after 5v being used and still have 95% of power on each of 20 battery cells. What can I do with the BMS board? Replace or repair it?

@TonytheCarEnthusiast 5 лет назад

Before I install the bms i always test the bms if it does truly work. I make a 13s1p and discharge the battery about 20 times. I don’t try to put the same voltage for each one of them because i wanted to see if the bms is working. If you find that one bms is working them stick to that bms !!

@thinkfx3078 5 лет назад

Thanks a lot man your a life saver, is there like a reputable company or companies that make BMS that we can trust?

@overnxted 5 лет назад

Thanks, I will start learn about battery cells

@kyfish-on3203 Год назад

The only video I have seen with the most important information on it! DIY batteries is not for the faint.... I need your help with the ebike 48v lead acid setup, popping and arching upon connecting, what is the best way to eliminate the risk of failure?

@sherannaidoo2712 3 года назад

I own 13 battery packs for my cordless tools. They cost a small fortune. I got tired of the factory installed bms shitting the bed every once in a while so I installed new higher capacity 18650s and bypassed the bms. Charging takes a lot longer but I've never had any failures since. Imho I prefer the reliability. Thank you.

@811andi 5 лет назад

A very good video! Thanks

@NageshMayappa 5 лет назад

Love the way things are presented, won't you be able to make videos to assist on recommendations over which BMS can be leveraged based on usage ebike or ev

@user-uh3bi2gi3g 2 года назад

Thanks for everything 👍👍👍

@messiahguilt 5 лет назад

very helpful information..

@OH8STN 5 лет назад

👍👍👍 this was an excellent video. The truth is Always Somewhere in the center. I almost always use BMS, and I never rely on cheap Chinese variants. I think a BMS makes charging away from home much easier. For example if I'm charging with a solar panel and charge controller, maybe a BMS will take care of all of the issues my home charger would solve for me. I think if I were discharging on the road and charging at home, perhaps there wouldn't be any need for a BMS. I do like the over and under voltage protection though, that's critical functionality.

@tubularap 5 лет назад

Yes, that is a good answer for when a BMS is neccessary : On the Road. Like on an ebike with solar panel trailer (which I'm building) you cannot balance charge during a trip. Sometimes I will plug in a wall outlet, solar charging goes on all the time, and I will use regenerative braking too. The BMS inside my packs will take care of the hassles that do not seem a big deal when you're at home.

@ikechukwuogbonna4211 4 года назад

wow , very insightful teaching on BMS, i actually use BLS which i instored in my batteries. I will like to help me if it is advantageous to have the two of them in one system.

@mattcousins1707 4 года назад

I love this channel. I bought your DIY battery book. Can you do a video on how to wire 2 BMS on a battery pack pls?

@electronica7385 4 года назад

thanks from Spain

@donaldshaw6824 5 лет назад

Great information!!

@kwadkrazy6078 2 года назад

I was in the FPV hobby for a while and all I used for my quads were non-BMS lipos, the very idea of a BMS on my packs was absurd. As you mentioned, without a computer cutting off the voltage to your motor for you, it's very easy to just go a little bit too far and end up with a battery that doesn't work very well, which is exactly what I unintentionally did at least 3 times

@ElectricScienceDad Год назад

How high would you go on voltage for a battery that doesn't have a BMS?

@kwadkrazy6078 Год назад

@@ElectricScienceDad 4.2v per cell. Higher than that and you damage the cells. What I'll do when I don't need the extra range is charge the cells to 4.1v, which extends the lifespan of the battery pack.

@justynssagan6156 Год назад

We would love one of your beautiful amazing books 📚 ❤️

@kornshadow097 5 лет назад

Ha, I was just looking at those books online. Can you use a bms AND use a balance charger once in a while? As a safe check point? Seems to me a bms is just a internal relay with a temp and or over/under charge shut-off.

@AjithKumar-ym7qe 3 года назад

Good job man

@devnuls 2 месяца назад

Can you explain the way you constructed the dual BMS system for the car? Also I was considering putting the outputs of a few finished battery packs (PB120B1) in parallel parallel. They use a DLX-HT-3S6A BMS internally. I am wondering the proper way to protect them, and if they would be switching between charge and discharge, since the BMS only has 1 pair of wires that are used for both the load and charging.

@Phoenix540 2 года назад

OK, now what about BMSs on series/parallel battery packs, is it a special type of BMS or can you use a standard BMS?

@acuman01 Год назад

Great video. Could a power failure while riding be s symptom is a bad BMS board? Thanks!

@nathansmith5535 5 лет назад

That’s super cool!

@adityashukla775 5 лет назад

Share some knowledge about MPPT charger in solar panel.

@CaptainXJ 5 лет назад

Is there a video of the Cobra, because that thing looked amazing.

@SoftBreadSoft 5 лет назад

Essentially yes. There are primitive solutions like voltage sense/alarm gates with bypass switches for each battery, the dead batteries will stop outputting and switch the circuit to charged batteries. Though this is not great in a series circuit where you need a constant voltage.

@SoftBreadSoft 5 лет назад

(And the inverse for your charging circuit, would be a balance charge circuit.)

@keithballard4621 6 месяцев назад

Here’s a mind bender; what about a combination of lithium titanate and supercaps?lithium titanate (headway) cells for cold charging safety, and supercaps to handle the high discharge burst on steep hills.