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About to grind charge for first time, couple questions...

Discussion in 'Gen 2 Prius Technical Discussion' started by ChaseE, Mar 2, 2022.

  1. ChaseE

    ChaseE Junior Member

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    2005 Prius
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    Using a meanwell 350ma 257v power supply to trickle charge my pack, have it all wired up, but testing the 300v 10a voltmeter I purchased seems off by +/- 5v so I'm leary off relying on it...could I just charge till it reads 235v and then just check once an hour turning the car to accessory so I can get a more accurate read from the Dr. Prius app via my obdii scanner?
     
    #1 ChaseE, Mar 2, 2022
  2. Tombukt2

    Tombukt2 Senior Member

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    My buddy Raj just delivered my charger on his magic carpet EV.. I’m charging at 2.4 Amps to 335 max I think it is . You charge till there’s no changes for 5 seconds on the meter . So my pack got to 265 V and stayed theyre I left it 60 seconds with no climb. On my custom charger I just turn off leave connected and watch display after 12 hours it was at like 236.. this battery I’m testing is a greentec lotsa build up on some plate nuts etc .nothing got warm at all during charging .usually wen bad things happening during charging Heat is generated ..
     
    #2 Tombukt2, Mar 3, 2022
  3. alftoy

    alftoy Senior Member

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    You can test and adjust the voltmeter and Meanwell if you are so inclined.

    https://www.insightcentral.net/threads/olrowdy01-v2-grid-charger-build-illustrated.126021/post-1457006

    Also study a bit more on balancing the battery.

    Can I borrow your battery charger/balancer/reconditioner? | Page 7 | PriusChat
     
    #3 alftoy, Mar 3, 2022
    Last edited: Mar 3, 2022
  4. ChaseE

    ChaseE Junior Member

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    Location:
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    2005 Prius
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    Charged overnight, just got done from an hour drive running her hard, sat idle in park for a few minutes to let the pack settle...anyone have any insight? To me it looks like bank 1 and 14 maybe have some corrosion on wiring or busbars causing higher resistance, which would correlate to the voltage being highest on those?
     

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    #4 ChaseE, Mar 5, 2022
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