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What powers Backup power supply (BPS)?

Discussion in 'Roadster: Technical' started by lmore, Apr 17, 2016.

  1. lmore

    lmore Member

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    Location:
    Trondheim, Norway
    #1 lmore, Apr 17, 2016
    Last edited: Apr 17, 2016
    When BPS is running, which bricks does it take its power from?

    I ask about a Roadster 2.0 that has a 12 volts battery, not a Roadster 1.5.
    I have problem with brick #28 never reaching the same voltage as the other bricks when the car is charged, even if the car is plugged in and has been balancing in standard charging mode for two weeks (car has not been driven in this period).
    Tesla Service reported that my BPS is active and there is also communication problems with "Battery Monitor Board(BMB)". Both of these are in the main battery. The car never shuts down.
     
  2. lmore

    lmore Member

    Joined:
    Nov 6, 2011
    Messages:
    124
    Location:
    Trondheim, Norway
    Or instead of taking the power from main battery sheet/bricks, does the BPS take its power from DC-DC converter (400 volts to 12 volts)?
     

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