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150A - https://amzn.to/2JSijUX
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500A - https://amzn.to/2XWqqJI
4000A - https://j35.us/Gigavac-GV200PA
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8) Why not use Supercapacitors?
A. Batteries work better at this time, caps are rare and expensive devices that are very good at doing things not needed for storage systems typically.
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17 thoughts on “4000a bms?”
  1. Avataaar/Circle Created with python_avatars nitrous dude says:

    What are the implications for charging? Especially charging/discharging are on a common pathway?

  2. Avataaar/Circle Created with python_avatars Fuzail Ahmad says:

    How about using a MCB controlled by a servo?

  3. Avataaar/Circle Created with python_avatars Joe Abad says:

    This channel gives us DIYers options to do the samething in a cheaper way..

  4. Avataaar/Circle Created with python_avatars William Vaughan says:

    Need a latching relay if it could be made to work with the bms

  5. Avataaar/Circle Created with python_avatars hpk says:

    contact me please id really like to hire or pay for you knowledge on batterys

  6. Avataaar/Circle Created with python_avatars M D says:

    Great vid – I love the comparison of the motor controller to the BMS to illustrate how costly a mosfet-based BMS would be. Iโ€™m slowly learning about these things because like many others I need a high-amperage BMS solution and saw the all-in-one units topping out at 300 or 400 amps.

  7. Avataaar/Circle Created with python_avatars Sujaya Sankar says:

    Please add a circuit diagram so that it's easy . I am having the same issue please help

  8. Avataaar/Circle Created with python_avatars Bigislandguy says:

    Does anyone know if those TC connectivity Contactors are rated for continuous duty?

  9. Avataaar/Circle Created with python_avatars Bigislandguy says:

    Im building 4, 64ah batteries, I bought the bus boards from you but now…what would you recommend for a balancer, temp/voltage protection? also looking for a cell monitor like you have, I know it's discontinued, so should I get a battery go monitor? I'm new to this stuff so my head hurts from all the research. Can I just paypal you for Q&A's. lol… Ugh! thats how I feel .

  10. Avataaar/Circle Created with python_avatars Bigislandguy says:

    Hello, can I still use this type of BMS if I charge above a 100 amps? Reason I asked, is because it says it has over charge current protection of a 100a. I have a 320a HO alternator. I want protection for temp/voltage ect. any recommendations?

  11. Avataaar/Circle Created with python_avatars Sailor K says:

    I think Perfect for a golf cart battery!! So, charge through BMS directly?!? Use a Golf cart solenoid to apply power to the motor. They are $15 on Amazon. So, thinking of a 12S Lifepo4, which should charge at 20A. Wonder if BMS's have variable cutoff voltage. Thinking to cut off high speed at slightly higher volttage (2.4V?) and low speed at 2.2V? So if battery gets low a long way from charging station, can limp home at low speed….. Would this work?

  12. Avataaar/Circle Created with python_avatars jamesdmount says:

    I have watched this video and the video where you put 2 BMSs in series. I have 45 (3.2v) lithium iron phosphate cells making up a 144v battery pack. i am asking can I manage all the cell with two 24s BMSs connected in series but not connected to the battery pack for charge and discharging. (use them as switches as demonstrated in video) Run 12volts through them to a solenoid contact-er that will turn off the charger when max voltage is reached per any one cell. If yes, I intend on adding a two way switch on dash. Up for charge and down for discharge. On discharge BMS will interrupt 12v to main contact-er for low voltage shut-off. Thank you, Love your videos!

  13. Avataaar/Circle Created with python_avatars Adam Opheim says:

    How do the typical "12v" relays transfer over when you UP the voltage. IE how will a 300a 12v relay work on a 72v system? What relays to you use for typical higher voltage Ebike builds?

  14. Avataaar/Circle Created with python_avatars GHILLIES ARCADE AND MORE says:

    Cool

  15. Avataaar/Circle Created with python_avatars GreenFish says:

    This is exactly what I was imagining and just found you doing it. no need to test it then. I am going to do this! Thanks!

  16. Avataaar/Circle Created with python_avatars James Mason says:

    Your link doesn't work for the batteries

  17. Avataaar/Circle Created with python_avatars Boogle says:

    Is this for battery amperage size i.e. 24v 400A ??? Or for current charging ability 400A/hour ????
    Could u be specific thanks

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