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Gen II Prius Individual Battery Module Replacement

Discussion in 'Gen 2 Prius Technical Discussion' started by ryousideways, Apr 24, 2013.

  1. Carall

    Carall Member

    Apr 22, 2023
    Harrisonburg, VA
    Other Hybrid
    Cell polarity reversing while on discharging is just a theory. This happens when a weak module sits self-discharging for weeks.
    The battery I just cycled had been discharged for about 30 hours. I forgot about it because i didn't really care. That battery came from a recycling management, pulled from prius with over 200k miles.
    The voltage was 0.3 volts for all 28 modules, after discharging the whole pack for ~30 hours.
    On the same battery, I left it discharged to 1.5 volts for 4 hours with no load. Now it's charged to 239.5 volts. I'll test the battery in a few days when i have time.