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bq76PL455A: Maximum number of cells in battery

Katsuhiko Kaizawa
Intellectual 2045 points
Part Number: BQ76PL455A

Hello supporting team,

I would like to know the maximum number of cells in battery in actual use case or in evaluation experience using bq76PL455A in daisy-chain.
Would it be possible to provide those information?


Best regards,
Kaizawa

  • 0
    TI__Genius 11480 points
    Hi Katsuhiko,

    The bq76pl455A can support up to 16 series cells in one module. We can stack these modules with daisy-chain communications or communicate up to 16 of these modules for a maximum of 256 series cells. The number of parallel cells does not matter.
  • 0 in reply to David Wiest Jr
    Prodigy 10 points
    Dear David, Your reply is mentioned in the datasheet itself. What Katsuhiko wants to know is that whether to anybody's knowledge is there a practical usage or prototype evaluation experience where a real battery developed with a BMS using this device has been tested with such huge number of cells in series. The device datasheet, at many instances have quoted values for parameters with a note that reads "Specified by design, not tested in production". This statement would make any designer feel tentative especially if he is contemplating to use this device for building a Li-ion battery pack with very high number of series connected Li-ion cells. I also want to know if this device (BQ76PL455ATPFCRQ1) is qualified and suitable for building a 650V, 86 Ah Li-ion battery (180 cells in series, 2 in parallel) for an pure Electric drive bus application. Please confirm in view of the above.