What is a Battery Management System?

Have you ever wondered how a Battery Management System works? Erik Stafl, President of Stafl Systems, walks you through the basics, starting with two primary purposes of a battery management system for a lithium-ion battery pack: providing safe and reliable operation.
Topics Covered:
Purpose of a BMS
BMS Inputs
BMS Outputs
Current Sensors
BMS System Diagram
BMS Communication
The Battery Management System takes a number of inputs, including voltage, temperatures, and current among other inputs. The BMS then runs algorithms to create a series of outputs including state of charge (the fuel gauge), the state of health, the safe operating envelope ™, and any faults the battery pack may have.
Erik then describes how the BMS is used in a multi-cell application, using a system diagram.
Learn more at staflsystems.com.

[@mytube7473]

justin trudeau is clearly a man of many talents.

[@planetmoving9180]

Yes, but this look alike sells bMs, rather than plain BS.

[@splineMerl]

I was about to say that 😅😂😂😂

[@jamez1224]

😂😂😂

[@worldinandaround]

haha

[@CosmologDiraEinstformula]

Ur geniune comedian😂

[@louisbrai2822]

This is so amazingly well explained. It gives a short simple overview of what a BMS is and how it works without compromising on any vital information. Very well done

[@TheHowmyable]

Thanks for the clear explanation, it turned out very helpful for my thesis!

[@kihelsifeddine7802]

Dear eriik,
Thanks for the simple and clear explanation, well done 👍

[@badrel.192]

Very simple to introduce the BMS. Great presentation !!

[@christonesmichel3090]

Great video. I love the use of the whiteboard, very clean!

[@MrBambalan]

Easy to understand presentation. Well done Erik.

[@tonymunn]

Excellent video. Thank you.

[@anashussami3689]

Thanks for the clear explanation, your work appreciated

[@TheViru123]

Dear Mr. Eric,
Thanks for presentation, your video is very simple and effective about BMS.

[@deanesau9106]

Totally agree

[@zle5909]

Thank you! Very Helpful

[@williamkapembwa458]

Simple explanation but powerful. 🙏

[@borkostolo9196]

Great presentation. Very articulate clean.

[@zafarakber2230]

What a great way to explain to a beginner. The concept is very clear with this presentation and will help understanding the next levels. Thank you Sir

[@TheHumperdebumper]

Very clear, thanks a lot!

[@danward6420]

Thanks for doing a great job of explaining what the BMS in a battery pack does.

[@asmashakir9484]

this is the best explanation on bms....

[@dikkospeakerscompany8713]

Great , thanks for this , clear classes

[@beulahakindele9990]

I will make a playlist if you don't have one!!!! This is so great!!!

[@lisasmith3981]

Finally someone else who explains this

[@ashrafkassim2688]

Very good presentation, thank you sir.

[@asiyahhanifah2094]

Great presentation ,

[@saraali-kx2mo]

Best explanation!

[@shakarhussain3632]

Excellently explained

[@Lalthlengliana.Khawlhring]

Thank you 💐

[@thehebrewmessiahcom8164]

Thank you. One question please, when the BMS terminates charge or discharge states, in a cell, do the other cells, combined, continue functioning at a lower capacity? Or does the system just shut down as a result of that 1 bad cell? I'm sorta new at this. Thanks again.

[@SystemHacker23]

does the BMS limit what the battery pack's max pulse draw is or is it separate?

[@user-sg9fh6pg2y]

great vedio. TYVM.

[@sudheerkumarogeti7687]

Very Nice Explanation. Lots of information. Please do more videos

[@rajasharma7577]

Hi
Can u tell me how to decide what should be balancing current according to the capacity of the cells?

[@tr-GoodVibes]

great explanation

[@nomanshiekh26]

Very Helpful 👍

[@danielchen9841]

u create grate vid .thank u very much

[@jeffsit_davidli.333]

Hi Erik, when the battery pack is not on a load (not connecting to any appliance or device) or even charging, will the BMS be still working automatically to balance the cells ? the cells will discharge themselves over time, not sure if the BMS still detect the pack and start balancing according to the cell parameter. Thanks !

[@ritapedrorp490]

Really good vídeo :)

[@psujith9300]

Wonderful video sir

[@Assad.Ashi_1]

Nice information
Thanks

[@vamsikrishna5391]

Very good explanation sir

[@bra1nsen]

Thank you

[@DakshinaRaghu]

Great video! :)

[@MrSchnickel]

this was a well presented explanation and i greatly appreciate it. i do have a question. can the leads of the BMS be connected to the plus or minus on the batteries. the info i have it should be the plus side. however overkill BMS is using some plus and some minus connection. do u have some inside?
thanks for ur time

[@rishabhkumar7503]

very nice and informative

[@paulwyleciol3459]

thanks!

[@chrislincoln489]

Question. I have a 4s 12p pack with a BMS. Here is my question. If I connect the leads to each row (4) they monater each row but what each call on each row. There no way they are checked,Right. Thank you

[@milan2931]

Is there a BMS 16S in your plan for LifePo cells for HV battery design?

[@annonymousvector1690]

Thanks for the video. Great stuff

[@danobonano1315]

I'm rebuilding a 15s2p battery pack, can I replace the original 30 amp bms with a 60 amp bms? Thank yu

[@richardphillips2405]

Thank you for your video. Great explanation for how a bms works. I am wanting to learn how to test a battery pack that won't take a charge. Is it a bad battery or a bad bms? Can the bms be bypassed to see if the batteries in the pack will charge directly?

[@Mikeb8134]

I'm very new to ebikes. If you have 10 seconds I have a quick question sir; if someone was running 2 hub motors and their combined max current from the controllers was 60 amps, and you used a battery with 50amp BMS (52v 20ah), what would happen? If you ran WOT you may trip the BMS of the battery and it come back on after a few seconds? Or something worse? Thank you!

[@OlympusHeavyCavalry]

Why are the outputs based on algorithmic averages as you have stated, and not actual readings?

[@ManuEnduro]

Hi Erik, great videos!
Can you also explain how an I²t counter works? I understand it is like a bucket that fills up. How does it empty itself?

[@PeterOrrick]

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

[@EvenStar303]

Hi, I have a left over 48 volts BMS and charger from an E-bike.
And I wanna use the 58 Volt charger to charge a 24 Volt 18650 battery pack.
Can I use half of the BMS to charge the smaller Battery pack???

[@ranjitmangaraj7924]

Sir, great Explained. Please post some video regarding Battery Testing in lab with power Anzylr .. and with some software

[@cadillacescalade1]

Fair enough 👍👍👍👍👍

[@carlosreyes6448]

What does charge and discharge mean in a bms?

[@al-ayoungentstailorfasalia651]

Thanks

[@saifsyedmohammad3769]

I want to charge 12V lithium phosphate battery with a charger or power supply especially fast charge with 100Amps that can take energy from Mains supply.
How to select my power supply ?

[@SonuKumar-ot5px]

Sir I have a question I have li ion battery pack with making it basic bms which is comes from chine
In this battery pack I tested on aging machine it is goes upper voltage 39 volt to sharp 54 volt when I charging my battery pack having nominal voltage is 36v/10ah what is the reasion behind it

[@krishnagupta9667]

My 17s battery pack is not charging above 69v
I have series 13s and 4s bms
There is a bit of unbalance in the cells about ± 0.05 volts
Also the bms cuts the power at only at 61 volts about 3.56 per cell
Please 🙏 tell me the reason so I can repair it
(About two times the positive and negative terminal also get short fow a few second with bms installed)

[@meisievannancy]

Good explanation. How does one bypass a BMS and charge a low cell via current controlled power supply at say 20% of the Ah rating rated current.

[@Free__Speech]

Things wouldn't exist without electronics

[@Karncagibiolagradmlarlailerle]

Harikasın sayende rc arabamdaki sorunu çözdüm

[@holzwurm_hd7029]

So if i were to replace a battery woth a max charge Voltage of 8.8v with one that has a max charge voltage of 8.4 the BMS would basiclly think the battery is older and not overchage it?

[@billligon4005]

So what Smart phone app can access this information? How is connected?

[@potelbat]

Do we have a full circle recycling system?

[@alexyap7323]

We are building our EV Motorcycle.. we need this. Educational.

[@-4kt]

why is the gnd of the slave of the two integrates connected by the daisy chain connected to the last cell of the master

[@user-ob3xz9gk9e]

Nice

[@AudX]

SOC is taken for System on Chip.

[@electrical_engineer1]

Sir, charger why not on without bms??
How to on for testing without bms??

[@EricPham-ui6bt]

thanks 😅

[@prasuRangoli]

Wt is galvanometer resistance in BMS

[@MikeJrOfficial]

Tom Cruise little brother?? haha, good video.

[@ashujoshi1632]

useful

[@roshandeshmukh9818]

Hello sir please make playlist 👍

[@tmntgamingchannel287]

please Matlab Simulink also added for BMS.

[@snehalraj7309]

I am an engineering student from India. i am looking for a proper BMS and also the most reliable battery that my team NIRMAAN HYPERLOOP can use in our boring machine and the hyperloop pod, if you could help us with your knowledge on thus, it would be great. thank you

[@cjtheodore]

Amazing video. Simple and incredibly intuitive.

[@manishjaiswal3523]

why is there a 400-500% price difference when we go from cell to pack level?

[@shithinkv7391]

Usually master disconnect possible at negative side

[@wasiuirawo1383]

How can we get it

[@sudhakarv2823]

Sir please explain about DCDC/ESC converter.

[@ciurdarandrei6311]

One video is equivalent to 6 months of university courses :)

[@user-qy5qv9vp1o]

what is this SOE ?

[@poginani7951]

you mean to say monitoring the cell or battery if its charging the wire for cell b1 b2 b3 just monitoring only not charging the charging come from negative and positive and the other 3 wire b1b2 b3 just monitoring the voltage when charging

[@WiSeNhEiMeR-1369]

Howdy S-S, ...
any RECOMMENDATIONS for a 48 Volt BMS brand Name ?
I run a 36 PV panel system, in a 6S / 6P configuration 230 volt "DC" input
ALL-IN-ONE 120 / 240 volt "AC" GROWATT Inverter SPF 6000T DVM-MPV
I would like to BUILD my own Battery Bank ...
Thanks,
COOP
the WiSeNhEiMeR from Richmond, INDIANA
...

[@fehmighrairi5467]

i wanna work in your company please

[@eng.knowledgeseeker]

U look like Doctor Burg bro. 😂

[@ienmattroigee1037]

like

[@ugenegareth9339]

2 Esdras 2: 32

[@MykytaGromov]

If Tom Cruise thumbs up ))

[@splineMerl]

Justin Trudeau

[@MuneeswaranSaravanakumar]

Then where is thermal management

[@SDILUYNTsiu39fnd]

this isn't beatmania...

[@mevastronomy]

serious lipstick

[@tyt6877]

Justin Trudeau teaching BMS, nice.

[@RobertAdams-ly5ku]

This doesn’t answer the most important questions I have about a BMS

[@manojsaravana3877]

Thank you