Current State of the Art in Battery Balancers?

Discussion in 'Gen 3 Prius Main Forum' started by jimolson, Jun 21, 2025.

  1. PriusII&C

    PriusII&C Active Member

    Joined:
    Oct 15, 2013
    410
    134
    0
    Location:
    San Jose, California
    Vehicle:
    2012 Prius
    Model:
    II
    Thanks.
     
  2. PriusTech

    PriusTech Member

    Joined:
    Jan 13, 2011
    158
    85
    14
    Location:
    Reno
    Vehicle:
    2005 Prius
    Model:
    N/A
    It would be interesting to see your start to finish process written out, even if it was a condensed version

    Finally got the battery reconditioned and into the Lexus. The Dr Prius full battery test was good. The life expectancy is good but it says 102% life which I'm guessing is inaccurate. It was tested right after install so expect the mAh to go down.

    Do you match battery blocks by putting high / low modules in each block for overall balance? What measurement do you use to determine high / low modules?

    How many cycles of discharge / charge do you usually do?

    DR-PRIUS-2.png DR-PRIUS-3.png
     
  3. gdanner

    gdanner Member

    Joined:
    Jul 29, 2007
    105
    43
    0
    Location:
    Central Illinois
    Vehicle:
    2005 Prius
    Model:
    N/A
    Do not attempt to charge loose unclamped Prius modules. They will swell up to where they look like a large Subway sandwich. The one exception to this rule is that if you limit charging current to <600mA and make sure the module isn’t getting more than 10 degrees above ambient.

    Years ago I bought a pair of the white plastic end plates for the Prius HV pack on eBay. I usually stack 6 modules between the end plates. I clamp them with 4 long bolts and nuts. I never had any modules get bloated with this setup.
     
    PriusTech likes this.