Hybrid assistant report - bad hv cell block?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by toplinetax, Jul 8, 2019.

  1. toplinetax

    toplinetax Junior Member

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    Hi forum. Took a test run after installing hybrid assistant. Looks like I have some cells which have diminished based on % of time at low voltage.

    What do you all think? Trying to determine if I should budget a cell replacement or used battery at some point. Thanks.

    Screenshot_20190708-122914.jpg
     
    #1 toplinetax, Jul 8, 2019
  2. bisco

    bisco cookie crumbler

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    are you getting any codes?

    how are your mpg's?

    how many miles on her?
     
    #2 bisco, Jul 8, 2019
  3. toplinetax

    toplinetax Junior Member

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    Actually I didn't run the test accurately the first time. I followed the instructions as per the hybrid assistant website the second time around. Started with ~63.5%SOC and allowed the battery to drain with the AC set to low, defrost on and headlights on until -~39% SOC (two bars). Results attached. Looks OK to me.
     

    Attached Files:

    #3 toplinetax, Jul 8, 2019
  4. toplinetax

    toplinetax Junior Member

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    Mpg ok, avg about 45mpg. But we live in a hilly area. 180k miles. No codes, but occasional cyl2 misfire registered by Torque, not severe enough to trigger CEL.
     
    #4 toplinetax, Jul 8, 2019
  5. bisco

    bisco cookie crumbler

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    sounds like you're good, have you cleaned the egr circuit? does she burn any oil?
     
    #5 bisco, Jul 8, 2019
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  6. Grit

    Grit Senior Member

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    I know some folks in the bay area that has a grid charger to balance charge the pack, it's only a small sum to pay to get in and it's definately worth it because it beats buying an entire grid charger and your HV will last longer because you only have one cell within .3 volts.
     
    #6 Grit, Jul 8, 2019
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  7. Raytheeagle

    Raytheeagle Senior Member

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    All it takes is a harness purchase and then talking nicely to @SFO and @The Critic and maybe they’ll let you in:).

    I had good luck with the Prolong setup on our 2010;).

    Good luck and keep us posted (y).
     
    #7 Raytheeagle, Jul 8, 2019
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  8. 4est

    4est Active Member

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    Test looks fine to me...
     
    #8 4est, Jul 9, 2019
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