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BQ76PL455A: TIDA-0817 for 800V and 15KWh(continuous current) battery pack

Omkar Teli73
Intellectual 260 points
Part Number: BQ76PL455A

Hi Sir,

     We are automotive startup and building high performance electric motorcycle. For electrical side we want Active balancing for our Battery pack. I think as per current scenario no one is using that, they uses passive balancing. So my 1st query is if active balancing is feasible for 15KWh pack? for this pack 30A continuous current and peak current 60A for 10 sec and 100A impulse. We want your support for finding proper solution.

I was looking for TIDA-0817 for 1st prototype. In 1st step we are thinking to build 615Wh battery pack with TIDA-0817. We have 16S4P cell structure. So is it possible with 1 TIDA-0817?

What would you recommend to use your BMS for our application?

  • 0
    TI__Genius 17370 points
    Hi Omkar,

    Thanks for the question and interest! TIDA-00817 is our recommended active balancing solution, however note that you are limited to 5A balancing current and this design requires several other components other than the bq76pl455a . Many solutions use the bq76pl455a with passive balancing due to superior cost effectiveness and reduced system complexity, but we do offer a lot of documentation with this ti design to get you up and running. I'd recommend reading over the bq76pl455a datasheet first to ensure the specs will meet your systems needs. This is located here: www.ti.com/.../bq76pl455a-q1.pdf. This device monitors up to 16 cells but is stackable so you could use only one for a 16S module.

    Best Regards,

    Taylor
  • 0 in reply to Taylor Vogt
    Intellectual 260 points

    Thanks Taylor for prompt response, 

    Which is better one as per precise measurement and for battery lifetime and best safety, Active or Passive balancing?

    IS there any potential customer of you is currently using TI BMS?

  • 0 in reply to Omkar Teli73
    TI__Genius 17370 points
    Hi Omkar,

    There have been studies that show Active balancing can provide longer battery lifetime when using relatively high balancing currents although it is not as commonly used in industry because generally the higher costs outweighs the benefits - so you may have to use some judgement here. It is likely easier to achieve functional safety requirements with fewer components to do checks on and lower balancing currents (less concerns on thermal issues), so passive may be easier for safety - although this is dependent on your entire system and may not always be true.

    Regards,

    Taylor