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  • TI Thinks Resolved

BQ76PL455A: TI Battery disconnect unit recommend solution

Part Number: BQ76PL455A

HI ti ,

please provide TI Battery disconnect unit recommend solution

  • Hi John,

    I don't think it is quite clear what you are looking for... are you looking for a FET driver to disconnect the entire pack? In this case it will depend on your cell count. If this is something like a 48V solution the bq76200 may work for you. If higher cell count you will likely need a  discrete solution with a relay.

    Regards,

    David W

  • In reply to David Wiest Jr:

    HI David,

    Our company plan to build 48V and 400V battery pack for automotive.

    currently we just find solution like below

    we wish find solution to do charge\discharge for all battery pack .

    from your response. 

    Discrete solution with a relay ....

    any suggestion from control relay .

    BR

    John 

  • In reply to John Shen53:

    can you please clarify if this question(s) is pertaining to (a)random cell connections or (b) hot plugging?

    Vish Nadarajah , TI, Battery Automotive Products ,Applications Engineering , Dallas, Texas USA

  • In reply to Vish Nadarajah:

    Hi Vish,
    (a)random cell connections


    BR
    John
  • In reply to John Shen53:

    John,

    I am bit confuse. Are you trying to charge/discharge cells showing in your picture or actual 400V automotive system?
  • In reply to Roger Hwang:

    Hi Roger,
    Our target product is actual 400V automotive system.
    Currently we try use TI EVB (one 570 + three 1402 EVM) to develop some software algorithm (like soc \ soh, charge\discharge, thermal control ....etc )
    if you have any recommend other evb for BDU , you can also give us suggestion
  • In reply to John Shen53:

    Main purpose of emb1402 is active cell balancing.
    It is not for SOC, SOH, charge/discharge.
    They have to be developed by uC like TMS570.

    What you see is to demo cell balancing with EMB and TMS evm boards.
  • In reply to Roger Hwang:

    I know we can develop many software in the TMS570.

    That’s why we need addition solution for battery disconnect unit or BCU.

    Like control relay … etc

    You can see below .

    do you have TOP section solution for inventec?

    If can ,Please list part number

  • In reply to John Shen53:

    sorry we do not have sw support for the TMS from the BMS unit.

    Vish Nadarajah , TI, Battery Automotive Products ,Applications Engineering , Dallas, Texas USA

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