Gen II Prius Individual Battery Module Replacement

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

  1. Phildo

    Phildo Member

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    What charger do you have that will discharge at 5A?
     
  2. tri4all

    tri4all Junior Member

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    an older Dynamite Passport ultra charger. I also have two new chargers but only go up to 1-2 A max. it looks like the new version of the passport ultra also goes up to 5 A discharge

    what are your thoughts on the question I posted?
     
    #2402 tri4all, Oct 30, 2019
    Last edited: Oct 30, 2019
  3. Ed69

    Ed69 Junior Member

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    Reporting back to The Prius Collective to add data points on HV battery reconditioning.

    I used the Prolong Charger & Intelligent Discharger. I never opened the case and didn’t know to look for the sticker to date the battery to verify whether it is original to the car. This is my process:

    Date 2019/07/29: ‘04 Prius Hybrid Traction Battery long recondition 166,500 miles. Ambient temperature 75*F. The car normally gets 49 mpg and SOC usually hovers around 6 bars. -surprisingly good battery performance for a new to me 2004 Prius. Decided to recondition after a hot drive up a long incline to Joshua Tree (with A/C switched On) made the car go into one bar purple and the engine run noisy in “battery protection mode” for the first time.


    Chrg1: 14 hours 239V 342mA

    (Started 6:30pm @ 226V, rose to 238V by 12:30am, remained at 239V by 8:30am when discharge cycle started.)

    Dschrg to 134V - 8.5 hours

    (Bounced to 177V when I saw it)


    Chrg2: 21.5 hours 235V 322mA

    (Started 5:20pm @ 177V, rose to 228V by 1:00am, found it at 234V @ 8:00am, 235V @ 9:45, 236V @ 10:20, 12:30, 2:30, dropped to 235V @ 3:00pm when discharge cycle started.)

    Dschrg to 84V - 6.5 hours

    (Bounced to 180V when I saw.)


    Chrg3: 21 hours 235V 323mA

    (Started 9:30pm @ 180V, 230V @ 6:30am, 233V @ 9:30, 235V @ 12:00pm, 236V @ 4:30, 235V @ 6:30 when discharge cycle started.)

    Dschrg to 84V - 5.25 hours

    (Bounced to 163V within 30 seconds!)


    Chrg4: 34 hours 238V 232mA (Started 11:45pm @ 163V, rose to 233V by 11:00am, 237V by 12:00am, 238V by 9:30am. (Waited several hours before the test drive).


    Results:

    The car drove well and got good mileage even before the reconditioning. The results of three cycles are subtle but the car does appear to perform better insofar as the HV battery now largely stays at 6 bars, rarely goes into green and has yet to reach 8 bars. I saw it dip down to purple once when I parked the car but kept the A/C running but never during actual driving. Efficiency remains the same at 49 mpg with no dramatic changes in engine performance.

    Now after 4 months and driving 2k miles the reconditioning showed marked improvement to the traction battery. I’ve only seen the battery reach 8 bars once in 4 months and turn purple twice. It now likes to stay in the blue and does hover between 6 bars and 7 bars. I regularly get calculated 49-50mpg at the pump with computer estimating 51+mpg. I drive conservatively with my eye partially on the computer while on the freeway (aired 40psi on the tires) but otherwise do not bother with hypermiling games.

     
    #2403 Ed69, Oct 30, 2019
    Last edited: Oct 30, 2019
    offib likes this.
  4. Phildo

    Phildo Member

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    You'll most likely find that the charger won't discharge the modules at 5A.

    Sure, it will for a small, single-cell battery, but not for a six-cell Prius module.

    (Note: Huge lack of knowledge here, so it will be a vague answer.)

    Discharge depends on Watts and Voltage. It's the discharge wattage that you actually need to know about.

    I've got an iCharger 406DUO that discharges at around 10A. The 4010DUO discharges at around 20A.

    The old model Turnigy Reaktor Quadkore/Charsoon Antimatter 4x300W (ie identical) will discharge at 2.7A, increasing to 3.1A as the module voltage drops.
     
  5. Buphagus

    Buphagus Junior Member

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    How to do same test when car is running?

    My thought is to use the dr prius app in record mode and see the before and after result of a hard highway acceleration from 0 to 60 plus
     
  6. ianerickson34

    ianerickson34 New Member

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    Does another thread exist showing folks' success with diy module replacement/rebalancing? I would love to know how many miles one has achieved before the red triangle comes back after utilizing the rc charger techniques. I'm about to undertake this project myself to get my 2007 prius back on the road then sell but I want a clear conscience that it will last a good while for the next owner.

    SM-G930V ?
     
  7. Ed69

    Ed69 Junior Member

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    My 2-cents, if you just want to sell is to have a hybrid shop do it and get a warranty. Even a 1-year warranty will make the seller feel more confident about buying the car. This is if you live in an area that has many Prius specialists like LA that will rebuild and rebalance for $600 with warranty.
     
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  8. ianerickson34

    ianerickson34 New Member

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    That's the solution I'm arriving at as well. I have a good shop a couple hours away that I'll likely go with. Thank you!

    SM-G930V ?
     
  9. Frank1234

    Frank1234 New Member

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    am new to the chat so here my 2 cents,, if you going to sell it getting a warranty in the battery, doing the job in a shop will be the best bet, about how long will last to the red triangle to come back it will depend on how good the job gets done is my believe, many individuals just change the bad cell while others individuals change the bad cell and also test for any other cell that is weak doing a load test, the replacement cell should match the capacity as close as possible of rest of the other cells, meaning capacity of the cell it's what it matters, not the volts, you have to try to get the same capacity and I read that hybrid automotive can get you the capacity you need with only the year and miles from your car after you replace the bad cell you need to balance and volt on each cell even out on every one since capacity will be no 100% equal I recommend a grip charger to keep a balance, otherwise when the volt different get to high expect to see the triangle again even if all the cells are good this is my opinion.
     
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