Prius Battery Cell High Voltage

Discussion in 'Gen 2 Prius Technical Discussion' started by Carlos R, Apr 2, 2017.

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  1. Carlos R

    Carlos R New Member

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    I have a hobbyking Quatro battery cell charger and discharger, and I've watch a couple youtube videos on how they work, like this one.


    I do everything like he does, but I notice the charger goes up to like 10 volts, and I read 9.1 volts on the battery cell when it begins charging. I turned it off because I don't think they should be that high.

    What do you guys think?

    Technical stuff: Charging at 5 Amps, discharging at 1 Amp

    Also, what should the Mah read for these batteries?
     
    #1 Carlos R, Apr 2, 2017
  2. uart

    uart Senior Member

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    What are you charging Carlos. Is it just a single (7.2V) prius battery module? Or is it something else?
     
    #2 uart, Apr 3, 2017
  3. Carlos R

    Carlos R New Member

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    Yes it is a single Gen 2 prius module.
     
    #3 Carlos R, Apr 3, 2017
  4. uart

    uart Senior Member

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    Well that voltage seems way too high.

    Really only two possibilities there. One that it's a failed high impedance module, the other that's it's just overcharged to hell. To see which case it is, try discharging the module down to about 6 volts and then recharging.
     
    #4 uart, Apr 3, 2017
  5. MTL_hihy

    MTL_hihy Active Member

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    Run D>C at 1A then charge back at 2A (5A is way too high IMHO).
     
    #5 MTL_hihy, Apr 5, 2017
  6. morre76

    morre76 Junior Member

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    Hi Carlos,
    I see that 3 years has past, yet having same issue.
    When charging at 3 amp, charger reach 13V (reading 8.5-9 on the battery connector).
    When using 1 amp - charger reach ~9V.

    (2 batteries, 2 imax 6bac chargers)

    Did you managed to understand?
     
    #6 morre76, Jul 2, 2020
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