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09 battery health question

Discussion in 'Gen 2 Prius Technical Discussion' started by BwilliamsJ, Apr 11, 2024.

  1. BwilliamsJ

    BwilliamsJ New Member

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    new to the forum! I’m looking at a 09 Prius touring with 249k. I took screenshots of Dr Prius battery Health before and after test driving, how do they look? Thanks in advance!
     

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    #1 BwilliamsJ, Apr 11, 2024
  2. mr_guy_mann

    mr_guy_mann Senior Member

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    Well, that's kind of like going into a doctor's office and the nurse takes your pulse and BP. It gives SOME info about general health but is very limited. (Not dead yet!)

    A more thorough test would be to drive the car - hard accel and braking while monitoring the VOLTage DIFFerence data. In general, a healthy pack has that value seldom going over 0.3V for more than a couple seconds, even at high discharge and charge amp rates.

    The paid (android, not sure about ios)) version of the app lets you record data to a csv file while driving, and does a "battery capacity guesstimate test".

    Posted via the PriusChat mobile app.
     
    #2 mr_guy_mann, Apr 16, 2024
    Brian1954 likes this.
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