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05 new OEM battery 90amps @ Regen

Discussion in 'Gen 2 Prius Technical Discussion' started by Sykou, Dec 1, 2019.

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  1. Sykou

    Sykou Junior Member

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    05 Prius 104,000 miles. Just replaced the traction battery with a brand new OEM one.
    Referring to read outs given using the Dr. Prius app.
    Upon slightly heavy to heavy deceleration, my battery pack voltage goes up to 250+ volts with a charge rate of about 90 amps. The app lights up the battery pack voltage block RED and majority of the cell readout bars are RED as well during this time.

    This condition continues until slowing down to almost 5mph to a stop. At which time the battery voltage and charge rate drop down to a normal voltage and rate.

    I understand the Regen is activating but is this charge rate and battery voltage okay for the battery health?

    Hope someone has experienced this and can shed some light! Thanks in advance.
     
    #1 Sykou, Dec 1, 2019
  2. bisco

    bisco cookie crumbler

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    any dash lights?
     
    #2 bisco, Dec 2, 2019
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  3. Sykou

    Sykou Junior Member

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    No dash lights. 140 miles since battery was changed. Attached screen shots of my recording. 1730402A-5E0D-4A72-8344-061F069FB090.png 498F0C5C-CB9D-4CA0-9B4A-22878C2E275B.png E41DD65A-6B10-4867-B049-5224D672A06D.png
     
    #3 Sykou, Dec 2, 2019
  4. R-P

    R-P Active Member

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    I get over 260V during braking, but I am past 250k km (>150k miles) on the original pack and chalked it up to simple age.


    I think the Gen2 has the equivalent of 168 D-cells (someone on here sells packs with ACTUAL D cells).

    When slowly charging single (AA) cells on a sophisticated charger (Maha C9000), the end voltage is around 1.44V. If you want to charge them way faster, the voltage will likely be higher. I often use 1.5V per cell when quickcharging 10Ah D-cells (from electrical bicycles), so (extrapolate from one cell to a Prius pack: 1.5V times 168cells =) 252V for the total pack, doesn't seem that weird to me.

    But I am curious what others think.
     
    #4 R-P, Dec 2, 2019
    Last edited: Dec 2, 2019
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  5. Sykou

    Sykou Junior Member

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    No dash lights. About 140 miles since new battery was installed
     
    #5 Sykou, Dec 2, 2019
  6. bisco

    bisco cookie crumbler

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    i think youre fine. a lot of people question obd data when they dont understand it. i know i dont.
     
    #6 bisco, Dec 2, 2019
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  7. TMR-JWAP

    TMR-JWAP Senior Member

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    Your regen current and battery voltage are normal.
     
    #7 TMR-JWAP, Dec 2, 2019
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  8. Sykou

    Sykou Junior Member

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    I was dumbing it up and automatically thinking RED=BAD. Shut her down!!! Lol
     
    #8 Sykou, Dec 3, 2019
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  9. Sykou

    Sykou Junior Member

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    Okay. Making me feel more relaxed now. I’m so paranoid more so because it’s a new batt.
     
    #9 Sykou, Dec 3, 2019
    Last edited: Dec 3, 2019
  10. bisco

    bisco cookie crumbler

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    some here do the same thing with a new prius. as soon as they get a reader and start looking at the data, even though they dont know the specs, they start to think something is wrong with their car.
     
    #10 bisco, Dec 3, 2019
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