Battery Management System Or BMS?

Подписаться 433 тыс.

Просмотров 303 тыс.

50% 1

Its time I get busy making more videos, this is my self inflicted dailyish video maker bootcamp, This is day #88
********************************************************************************
Products Used in this video:
j35.us/Ebay-Laptop-Battery-Lot
j35.us/Cell-Log8
j35.us/Led-Balance-Display
j35.us/Low-Voltage-Buzzer
********************************************************************************
Music by :
j35.us/amazon-fjk-waiting
j35.us/Montevideo-Castles
********************************************************************************
Here’s a list of all the gear I use to shoot my vlog.
Panasonic Lumix GH4 - j35.us/amazon-panasonic-gh4
Panasonic 7-14mm f4.0 Lens - j35.us/amazon-panasonic-7-14
Voigtlander 10.5mm f.95 Lens - j35.us/amazon-voigtlander-10-5mm
Lexar 64GB 1000x SD Cards - j35.us/amazon-lexar-sdcard-64g...
Rode Microphones - j35.us/amazon-rode-videomic-pro
Joby Gorillapod - j35.us/amazon-joby-gorillapod
GoPro4 Silver - j35.us/amazon-gopro-h4-silver
SJCam400 - j35.us/amazon-sjcam-sj4000
Zoom EXH-6 - j35.us/Zoom-EXH-6
VidiU Pro - j35.us/amazon-teradek-vidiupro
Gear I’m considering purchasing:
j35.us/DJI-Phanthom3-Pro
j35.us/Amazon-DJI-Osmo-4K-hand...
j35.us/amazon-sony-rx100m3
j35.us/amazon-sony-a7sii
********************************************************************************
Instagram: j35.us/insta-jag35
Twitter: j35.us/twitter-jag35
Facebook: / jag35media
Beme: j35.us/beme-jag35
********************************************************************************
If you would like support our project by donating, you can use this link:
j35.us/helpwithcash or by using
patreon / jehu
********************************************************************************
Also please support our sponsors
j35.us/jag35-2016
gabvwkey.com
j35.us/indiespot-2016
evwest.com
www.isee360.com
www.rode.com/products
********************************************************************************

Приколы

Опубликовано:

9 янв 2016

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 252

@BraveRock 8 лет назад

I love technical videos like this one.

@alanbrown397 7 лет назад

For experimental use a management system isn't necessary - the point being that you more-or-less know the risks For general use you can't expect Joe Average to even know about imbalances, let alone care about them. Bottom line: GIven the fire risk of overdischarging, commercial systems without management are likely to fail the "insurance test" (ie, your liability insurance as a seller and your buildings/auto insurance as a user)

@woodywoodwood7525 3 года назад

Totally agree with you. BMS can hide a bad cell in a pack. I use balancing Leeds.

@GrizzySC 6 лет назад

Sorry i know this is a very old video but we use those "lipo alarms" in rc and leave them on while running the truck/car so we can hear the buzzer go off when we hit low voltage. Alot of new speed controllers for rc habe adapted lipo cutoff. Also alot of the rc branded lipo voltage check guages that connect to ballance leads also offer ballancing built in now too. Mine will ballance up to 6s and fits in my pocket. Great videos! Im just getting into ebikes and 4 wheeled electric ride ons. You knowledge is invaluable for a newbie

@rubenb.molina6968 6 лет назад

Agreed. A BMS is not required on most systems. I think a BMS is more of a simple solution for those who don't want to deal with more complicated cirtcuits. Yet, If you want to squeeze the most out of your cell's life, a custom monitoring system is the best way to go. You can go really creative with an ABMS (Advanced Battery Management System - and yes, I just made that up), which monitors your batteries every so often, controls your chargers, and alerts you when a cell is showing sings of struggle.

@michaellees-smith1231 6 лет назад

Ruben B. Molina i

@peterroulund1156 8 лет назад

Very good and informative videoes you make! I'm looking forward to making my own DIY batterypack from used cells thanks to your videos - well done Jehugarcia!

@jehugarcia 8 лет назад

Thanks

@kennedy6971 3 года назад

I am a electric bike person.. Every battery i build for myself has no bms.. I run extra leads to each bank to test voltages etc.. Roughly once a month i manually check each battery bank manually with a volt meter. I can use those leads to charge as well. 2x a year i manually charge each bank.. Ive had no problems.. Only problems ive had were with purchased batteries with bms.. I think as long as u keep a eye on things (and you have discharged and recarged all the cells your using to build your battery. Matching the cells is a MUST!! I cant say that enough. Match your cells and 95% of your headache is gone.

@robertbrowerjr554 3 года назад

you can just bypass the bms on the dis-charge side only to get max output and still have charging data going through the bms for charging safty!

@sveingjrannordb8101 7 лет назад

Very good, i like the thorough linking in the description.

@Kyle-gq7tk 6 лет назад

Hey. Thank you so much for your videos. I'm learning so much about batteries and plan to take on some projects in the near future. I'd love some tutorials/projects for complete amateurs!

@etiennelauzier5698 7 лет назад

Thank you very much for what you do. Great job, keep it up !

@midway241 8 лет назад

I really like your videos

@biaggiwins 5 лет назад

Learning so much from you. Thank you. SUBSCRIBED

@BobOBob 8 лет назад

Except -- YOU ARE the BMS. Most people do not *want to* stay as aware of the internals of their tools. A tech-minded person like you or me is interested, maybe even /driven to/ know, and with decent monitoring would usually catch problems in plenty of time. For my own toys, little meter/monitor/alarm cards cost about $2 on ebay. Oh, wait - you just showed it and called it a buzzer. That one. Works great for me.

@netsurfer10000 8 лет назад

very well said.

@darinmbicknell 8 лет назад

+Bob O`Bob But... if safety is the issue then which is safer. Jehu or the BMS? Depends on the application and the person. Ideally we would like to have individual cell management not just pack level or parallel column level diagnostics so you can detect issues and resolve almost in real time or as you say catch it in plenty of time. I appreciate that Jehu is being clear if you are unhappy with that level of "uncertainty" then you get yourself more data possibly with off the shelf items. Bigger issue cost as well as time required to put that sort of data management in place and getting the right BMS and wired it up correctly. Plenty of mistakes can be made wiring up balancing leads just watch any number of DIY e-bike videos RU-vid for that.

@BobOBob 8 лет назад

If safety is the issue ... go find the video where Jehu explained all those little fuse wires, one for *every cell*

@darinmbicknell 8 лет назад

Yup.

@baronvonlimbourgh1716 5 лет назад

It is just regular maintenance that comes with owning a car..

@perseverance8 6 лет назад

A BMS is virtually essential in consumer or similar products equipped with potentially volatile batteries types like lithium, however, I personally do not integrate a BMS into my packs, it adds cost & weight, I build my packs for my ecycles, one of them is a Headway 38120 16s pack, for its ability to provide excellent high amp performance, additionally, I run 18650 pack(s) in parallel for their lower cost of capacity, providing for an extended range, they are connected to a custom built regulator before being supplied to the motor controller, this regulator has the ability to connect four packs supplying four outputs, it allows for independent voltage & current programmability with data logging. My charger has integrated balanceing, like used in the RC world. All lithium batteries I've seen used in RC do not have an integrated BMS, they have a balancing plug & main supply, they commonly have integrated fuses.

@frankallen422 8 лет назад

most 18650 have a built in fuse right under the top. I have had many battery read 0 volts. take the top off and under the tab it reads 3+ volts.

@jehugarcia 8 лет назад

True that

@moodesigner 7 лет назад

+jehugarcia you should def do a video about that

@robindrake1407 6 лет назад

frankallen422 u

@DEPanswers 6 лет назад

My god you've saved me some money and some space in my trash can. I just stuck a knife under the cap and now they work.

@rizgarj8050 5 лет назад

If they have Fuse under the cap. Do we have to add an additional fuse outside?

@yousefyahia7255 8 лет назад

You are wonderful, I really like your videos. well work.

@kevinroberts781 4 года назад

Just make sure you have some kind of over volt and under volt control. It doesn't need to be called a "BMS". Know your battery. Monitor your battery. That is all you need.

@JawadAhmadsahibzada 5 лет назад

i agree, once i asked you sir "how many cells in series for 24v ups battery pack ?", you said 7S , and i made it. then i couldn't find BMS more then 20A in Pakistan, and i need at least 100A continuous , so i started using it without BMS, and it's been more then one year and it's still working great - i added just a fuse for protection, that's all. i didn't find capacity of each cell of the pack, i just fully charged and made sure that voltage drop don't exceed 4.15,. i learned - if you don't charge your battery's each cell more then 4 v then you don't need BMS and this will prolong your battery life too.

@Espr14 7 лет назад

When the battery is not used, you can switch them to fully parallel and they will balance themselves automatically over time. Then you don't need any management or balanced charging. If you balance them regularly, there won't be big voltage differences so you don't need to worry about high currents during self-balancing. All you need is one big switch which connects the battery for use (charge or discharge) or for self-balancing.

@necromecro 4 года назад

thanks to you you share a the info all you have :) what should we do if a battery is unbalanced?

@Sinista123 6 лет назад

My thoughts.. The reason for balancing is to prevent cells from overcharging. If some cells are at 100% already and the rest is at about 95% the charger will still charge the battery pack, because overall the pack is maybe at about 96%. So the full ones will get overcharged.. That's the theory... OK. good quality cells are never ever that far away from each other. And they don't break right away if they get charged a little bit longer. If you want to charge your cells super fast with many amps, a BMS is probably not bad but it will not balance the pack in such a short time. If you have the money and space in your vehicle, or you use many different cells you probably should get a BMS for maximum battery lifetime. A BMS can be really cheap and also really expensive. It depends on the quality and every BMS can break. If you have enough space, you could invest the money in extra cells, instead of a BMS. If space is very limited, it's probably also better to use all the space for cells instead of a BMS and just monitor them every few months.

@dnetne5508 5 лет назад

A little funny question: Can I like connect the negative wire to the main negative(even if 230v and 200amps) Like to save on wires for the same negative pole? And like have the positive wires at each batter(like 3.2v at 2amps)?

@plasmaguy5 8 лет назад

Very good info thanks

@lukewalker1051 Год назад

Your videos are brilliant. Thank you for the service you perform to the electric community by educating us.

@anwarigroup 4 года назад

One of the problem is that all batteries are not chemically identical and as well voltages are not same. Other problem is overcharge and over discharge problem. When batteries are connected they adds up with each other make more difference in voltage than a single battery. Using diodes, resistors and transistors to manage the power, and manage the charging of the batteries are not a bad idea. At least you have a protection system. Mostly when lead acid batteries overcharge they explode. So also the lithium batteries not to be left overcharged or over discharged. After they charged the voltage will be reversed, this might damage the charger and or the batteries or components connected.

@VroomvroomNY 5 лет назад

Do you recommend any good books to learn more about batteries?

@1981dasimpson 8 лет назад

it also depends at what current rate you charge at i have also noticed

@warialinth 8 лет назад

Yeah thanks to your "little bit" over-extensive cell selection in your packs you have almost all of them in same shape... so they are not that much susceptible to go out of balance.

@kingalbert9357 6 лет назад

Can I use those batteries for a solar panel kit for my house projects

@laubillum8197 6 лет назад

Question from Denmark. I have acquired an old electric cemetery garden car. it runs on new 3 x 12 volt 100ah battery in series. but i would like you have an BMS installed, what should i use in this case? I do not know anything about it, but i want to have en an experienced point of view, for what to use. and not use, mayby a link to a site? Kind Regards Lau

@FM-fn7eo 3 года назад

ok. if I don't use a bms , for example to connected 5s 18650 21v with bms and adaptor for bms . how do i charge them tougher and not separated ? thanke you

@acwrobel1 6 лет назад

As long as you don't have a catastrophic overheating (decent protection built into good 18650's) you won't have a very dangerous situation. A BMS is an added layer of safety. If the individual 18650 can self-manage, then it's not "essential" but is still beneficial. However, an emergency fire suppression system might be a decent idea, and it's not a one-or-the-other sort of thing. :P

@rocketrose2165 7 лет назад

Jehu you are my hero. I've come up with a way to use 18650's that I harvested from old laptops to power my ebike without using a BMS. I have thousands of cells that are already balanced charged. I just needed a way to use them like flashlight batteries. Use them, take them out and put in fresh batteries, recharge the depleted ones. I tried a variety of ways then found a simple system. No solder, no BMS and relatively easy replacement. I wouldn't suggest this for large arrays but for a 10Ah 36v system it works perfectly. 90 minutes replacement time, start to finish.

@gwizz7804 6 лет назад

Will a cell made from 100 x 18650's arrange in 10 parallel and then connected in series to create 37v balance itself or will I need a monitoring system?

@jgc97 5 лет назад

Can multiple bms be connected in series to come up with a higher DC voltage to charge and discharge using a small input source? Like the setup would be individual power input for the bms then the output/ discharge of the bms would be connected in series to one another. Would that be feasible?

@ukaszdabrowski7523 7 лет назад

You can film the movie as you were dispelling the build up of VW to the race. After the train, each part of the body will work and how the session will work together

@clintyoung8255 7 лет назад

Another great video bruh.

@fredbleichert7805 5 лет назад

In your Samba did you use recycled 18650 cells ?

@williamcastine7591 2 года назад

Question if I have 2 lithium phosphate battery packs 32 cells each headway and I'm using them for car audio. I have balance boards but want to keep a battery up front for the car alarm ect. What else do I need to make it safe and keep the maximum charge and discharge for amplifiers.

@sethlavinder 6 лет назад

Jehu, are you familiar with Bioenno batteries? I think they are LiFePo4 packs. I bought one that looks exactly like a 12v7amp sla pack. It’s rated I believe 13.2 at 8 amp with less than 1/3rd the weight of an equal SLA. I also bought their 13.2 Vdc @ 30 Amps pack, it is not a SLA drop in replacement. It was what I consider expensive. The 30 amp pack cost around $330 with charger. I found a NOS 35mm camera case and it fits perfectly in camera bag. I would love to build a Power wall ! I am amateur radio operator and would enjoy a project that would allow my entire radio room to operate from battery. Kind of a dream right now. I have a small portable radio made by a company called Elecraft that’s in Northern CA , it is an amazing radio but it has very strict max voltage. Anything over 14 volts and you are risking major damage to a $1,800 piece of portable radio gear. The math isn’t working out in my head well, but is there a BMS or DC2DC precision regulator that would permit building a very small 18650 pack that could regulate at 13.8VDC at 5 or 10 Amps? I will keep watching your videos for more information, just discovered your channel a few nights ago! Very interesting and professional content and production credit to you for all your efforts! 73 de Seth - W8FG

@ikentfix 6 лет назад

How do you charge you batteries? (batteries without BMS)

@Alrukitaf 6 лет назад

Whoaaa. ....motion sickness!!!!

@deanbornman77 5 лет назад

You talking about series. Do you need a BMS for parallel?

@TheElchzuechter 8 лет назад

So, is it enough to control the modules in series fromt time to time?

@michielhoynckvanpapendrech1069 5 лет назад

Wondering if I can use a 2 K Nissan Leaf batterypack to store my solar energy instead of the Tesla power wall ? Thanks, Mike

@georgeemanson 5 лет назад

Great video..… but I am looking for a "Lithium Cell Charger Module (BMS) with Battery Protection board" that would output a 18V system..... any thoughts????

@a.noureddine6821 7 лет назад

Useful video I have an electric scooter with an original 48V polymer battery that works well. But when I put in a lifepo4 48V battery it does not work. What could be the problem, knowing I charged the battery completely and I tested it?

@jamessawyer4625 5 лет назад

Thanks for the good advise and lesson

@agustinmoralesrodriguez1242 3 года назад

That's exactly what I thought. LiPo4 batteries can be managed through modern controllers with temp sensors. They have to change the parameters in order for the batteries shutting down with the controllers set ups and not through their bms. Simple redundancy. The controllers will stop in case of over or under voltages, shorts and high temps. I think I can get away without a bms on LiPo4.

@nismatarifi3120 5 лет назад

Hi, Hope all is well. All your vids are informative. I have a question about battery ppwer and how to use the max amount of power sending it to the end user. If one had 120000 that each produce 0.5V and 0.1 amp connecting 28000 to achieve 2800 amps and 92000 to achieve 46000 volts how would one go about achieving the max power lets say 120+ mw and how would you go about delivering that power to the end user?

@mohamadtubless 2 года назад

Hi Does imbalance happen in M18 Milwaukee battery packs ? If yes what should we do to fix it ?

@scavanger1000 6 лет назад

Would it be possible to wire up a bunch of 18650s as a backup powerbank, that supports level 3 fast charge?

@lorenswastesson8484 6 лет назад

Hello! just need to ask. If you put Lifepo4 batteries in a regular car with alternator. And just use bottom balance how to control so the batteries not getting over charged? Best Regards Lorens Wastesson

@simonac688. 5 лет назад

learning so much my brain is over heatig...tks so much...🤪

@Dduerto 7 лет назад

So your batteries have no sort of chip to control the discharge and so on? Do your batteries have a cooling system?

@johnwoods6751 3 года назад

Could you use a multiplexer to use the meter to scan a whole system?

@adamadamhoney 8 лет назад

Don't know if this has been mentioned here, with those little cell balance monitors or even a small charger can be left connected and just break the negative balance lead with a switch to turn it on and off as needed, really handy and cheap. Ive built projects and hacked a small hobby king balance charger into my enclosure after removing it from it original case and use switching to set to charge mode, cell check and run (use of battery). Cost about $10 bucks, great for small projects / batteries. Maybe not a car though :D

@jtmcfalls2230 5 лет назад

Where is the link for the testers used in the video.? Thanks

@abdlkrimaldhrey1224 6 лет назад

Great, thanks. .

@jonahwhale 6 лет назад

I did a 'bulk charge' on a 7s 24v tesla battery pack for a couple of years, then discovered that one of the cells discharged to 0v (must have had a bad 18650 that drained the cell), and the other 6 cells were charged to 4.6 volts. So I probably damaged all 220 18650s by trying to skip the BMS.

@prasathtex2558 6 лет назад

Hi Sri if you can please do a video how to repair the Prius battery

@Vigilante82O 7 лет назад

so BMS is only need it when charging in series configuration right

@lollol-tn5op 3 года назад

I am working on battery pack for electric scooter and bikes and the BMS save some customers because I saw one row gone gone before the others no voltage at all . If you try without BMS they will overcharge the other because they let the power going trough . example 10S become 9S and wthout BMS the charger will push 42V on 9s if is only 1S you don't need bms

@rtoebak76 5 лет назад

Hey my friend. Would you think pulling out the Battery management system will make it run better? Rc world has esc also for not burning things or blowing up. My ebike bafang bbs02 750w 48v has i believe an esc and the battery a bms. I can check voltage on my display nog going below 39 before it drops put. Balance charging my 13s5p ebike battery like my lipo's would be the same thing. My question is will a bms limit your motor from blowing up. Confused a bit.

@DamacusSquared 6 лет назад

If you have a multi pack, multi cell battery its just too much extra complication to monitor every single little insignificant cell individually. Monitoring the packs is fine but you don't need to use a dedicated monitor. A simple little tester like you use is fine to test each pack occasionally aft multiple charge and discharge cycles.

@kamikazekunze 8 лет назад

Holy motion sickness Batman....steady cam in the near future?.....great content as usual. 🤓

@jehugarcia 8 лет назад

+Alex Kunze Soon, once I can spend the proper time to produce these videos, production will go up.

@bereal1251 5 лет назад

I just sub to your channel love the videos you put very well put and easy to understand ..I'm trying to build a skateboard battery pack using the LG 1860 3000mah how many will I need to make a pack to last at least 10mile range ? Thanks for any information you can give me

@rajgj7041 5 лет назад

Do they need to be all the groop of cells in the same A ? ( Im planning to make a 24 v battery for ebike ) , and what happened if they dont !

@sham1234567891 4 года назад

Buenos Dias Jehu. I need a 18 volt pack for my Bosch cordless drill. What type of bam do I need. Thanks.

@mikeleinterrante6602 7 лет назад

would yo be able to explain me how can i make a 8s 4p for a electric longboard pls? do i need bms? how do i charge them ?,need to be all flat to the deck thanks

@RodneySolarCircuits 4 года назад

thanks

@igorkapnik9454 7 лет назад

hello,how would you charge a 48v 13s 7p battery with out bms?, just connecting a 48 volt charger straight to the battery? but for how long do you keep it on the charger? I'm new to this... Thank you.

@fazuelle 8 лет назад

how do you charge your batteries in the samba or the diy power walls?? do you charge them all together in one single block?

@jehugarcia 8 лет назад

+AndreyKandauroff yes

@edwardallen2425 6 лет назад

I used copper tape to make my connections without soldering each cell. Have you tried that yet?

@terryterry1655 3 года назад

Where to buy

@rajgj7041 5 лет назад

What if i make another connection (only for charging) of all the cells together in parallel and charge them with 4.2 v ?!

@GongshowGarage 4 года назад

Great vid just subbed!

@jesusmariarodriguezolivarr2477 8 лет назад

muy buen video y su ingles me ayuda para irlo aprendiendo, poco a poco

@1981dasimpson 8 лет назад

i wouldent say dangourse but will hewlp to lengthon the life of the battery pack as it will not allow some cells other other to over discharge

@garfieldx 8 лет назад

hey love you video style and your vids and very useful...Keep goign dude!

@ralphbrown2714 5 лет назад

Great

@nicholaswong4214 8 лет назад

What are the different capacities between your 18650 and Voltronix packs? I do wonder how multiple chemistries would work at different capacities. In theory, the 18650 can definitely act as a booster pack to supply large current spikes.

@jehugarcia 8 лет назад

+Nicholas Wong 20Kwh on Prismatics Vs 24Kwh on 18650 Tesla Pack

@nicholaswong4214 8 лет назад

+jehugarcia I'm assuming the voltages are close and packs are wired in parallel. Have you ever run the 18650 pack at lower capacity than the prismatics?

@CrankyCoder 7 лет назад

if you have 24 batteries in a cell, how do you balance 24 instead of just 3? more connections?

@carlosrodrigues77777 7 лет назад

hi @jehugarcia im a fan of your channel. id like to say that you are an excelent guy, wich can explain the things really simple and really well. i've seen a lot of your videos. i needed your help cause i have an electric unicycle model TG T3 and battery is really bad. my plan is to extend the range of it. i dont mind to carry a battery on my backpack, thoug i prefer get some space to it by drilling some plastic. also do you think is better use lipo batterys like Rc models or use the standart stock 18650 batteries? is better to use bms or use a IMAX b6 and the portable battery logger or use a bms? thanks a lot. hope you can help me out. have a nice day.

@xavcore 5 лет назад

I believe is not necessary!!!! Thanks 😊 thats cells is so inteligent. Thats cells protect himself. All the same mah work great. Rc experience.

@CrAzYDr1veR 8 лет назад

there is a video with you testing the tesla fuse on an indifidual cell so what was the result?

@jehugarcia 8 лет назад

20A

@Ordinary-Hendrik 7 лет назад

What is the name of the battery monitor you are using? Where can I buy it? Thanks and appreciate for everything you share!

@jehugarcia 7 лет назад

+1000delight link in the description

@Ordinary-Hendrik 7 лет назад

+jehugarcia Thanks!

@cody9089 7 лет назад

awesome video

@shawnhopping5984 6 лет назад

Can you give me a reference as to who could repair a lithium battery for me?

@2jimmyjimmy 5 лет назад

do you know how many lg18650s I need to build a 48v 10ah battery?

@MrBrymstond 7 лет назад

I seen brand new batteries fall out of balance right off the start because the had a different internal resistance.

@mamun2a 5 лет назад

I want to make one 6cell 11.1 volt, 4400mah battery with a laptop batteries. It will be used in motorcycle as replacement of lead acid battery. Do I charge it from bikes charging system? I don't want to use any bms. Please help

@Abricos4440 5 лет назад

If I have 300S what do I need to use ?

@thepowerofzero4534 6 лет назад

You mentioned everything except how your going to charge a big powerwall without a bms. In order to do this, your going to need more than a bank charging hobby charger.

@ericspearsairborne 7 лет назад

I'm kinda new at this but if your running solar and use the 18650's banks wouldn't the charge controller do a large majority of your Batt maintenance( charge, monitor, trickle etc) in talking like the nice expensive Outbacks and the like, not the $19,99 ones from Harbor freight

@MegaBmwdude 8 лет назад

Keep going with videos, there the best!!!

@PeterOrrick Год назад

Can I connect the battery directly to the hover board, bypassing the BMS?

@djpro8258 4 года назад

Can i use my Alternator to charge a Lithum Ion Battery

@antonnpn9063 8 лет назад

Keep doing videos about 18650 batteries im learning soooo much:)

@vikramrosebud 8 лет назад

The reason I believe, why your samba does not require a BMS with multiple chemistry is probably because the brick type and the 18650s are in parallel to each other, where in they sort of self balance. Of course safety is taken care of, but when you mix multiple cell capacities in series and connect it to a charger, then what can you do?. For example, a 1000mah cell in series to a 2500mah cell?, the 1000mah cell is going to charge in less than half the time and the 2500 is going to continue and the 1000mah will get hit with currents constantly. Hence, the need for a BMS