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My 2011 Prius HV battery voltages

Discussion in 'Gen 3 Prius Technical Discussion' started by fortec, Aug 5, 2022.

  1. fortec

    fortec Junior Member

    Joined:
    Sep 19, 2016
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    Location:
    Los Angeles
    Vehicle:
    2007 Prius
    Model:
    One
    The modules of the HV battery supposed to be balanced meaning within .1 or .2 difference.
    But when I removed the harnesses in order to charge each modules I found that my modules are alternately different by about .4v meaning the first would be 8.1v then the next one is 7.7v. And it would alternately be like that down the pack.
    Is that normal?
     
    #1 fortec, Aug 5, 2022
  2. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    23,239
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    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    The car is only able to monitor the voltages in blocks of two, so as long as those pairs kept adding up to roughly the same 15.8 or so, the car wouldn't know any better.

    But no, it isn't ideal.
     
    #2 ChapmanF, Aug 5, 2022
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