Battery rebuild experts need some help please.

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by vendingtech, Oct 1, 2019.

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  1. Prodigyplace

    Prodigyplace 2025 Camry XLE FWD

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    Did you use a small torque wrench to properly tighten the nuts? The experts here say that is critical too.
     
    #21 Prodigyplace, Oct 4, 2019
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  2. Sharnold

    Sharnold Active Member

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    Yes I bought one from harbor freight over tightening the nuts will cause issues. The numbers from techstream look good but to truly test the 12volt you need to have a reader that can load test it properly bc a bad 12volt will cause all sorts of issues. It shows yours last test was only at 11volts so I'd definitely check it under load

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    #22 Sharnold, Oct 4, 2019
    Last edited: Oct 4, 2019
  3. Sharnold

    Sharnold Active Member

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    Also are you testing everything with the car in the READY state? If you want to load test your 12 volt without removing it look at its voltage with everything off then cycle your headlights on then watch that number. Or you can go to live test and cycle through stuff like turning the electric fans on and off and check the load voltage.

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    #23 Sharnold, Oct 4, 2019
  4. vendingtech

    vendingtech Member

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    No I did not use a torque wrench. I have not seen a small one at harbor freight. Can you link one and what spec are they torqued to?

    As for the 12 volt I have taken it orielly and they put their battery toy on it to load test and claims it's fine. But I'll buy a new one to make this headache go away if there are concerns it's jacking things around on me.

    Thanks

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    #24 vendingtech, Oct 4, 2019
  5. Sharnold

    Sharnold Active Member

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    #25 Sharnold, Oct 4, 2019
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  6. vendingtech

    vendingtech Member

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    Just brought 12v to AutoZone for load testing. It passed at 12.85v

    I'll hit harbor freight tonight and I can go that road on the battery posts If you think that will help.

    Any other thoughts from my techstream info or any other tests I should try?

    Thanks



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    #26 vendingtech, Oct 4, 2019
  7. Sharnold

    Sharnold Active Member

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    #27 Sharnold, Oct 4, 2019
  8. Sharnold

    Sharnold Active Member

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    Did you test the car in ready mode? And watch the live battery numbers to see if you had any major fluctuations in the cells?

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    #28 Sharnold, Oct 4, 2019
  9. vendingtech

    vendingtech Member

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    I can go do that now. I was just following the earlier requests.

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    #29 vendingtech, Oct 4, 2019
  10. Paul Schenck

    Paul Schenck Active Member

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    Delta SOC that stands for Difference in State Of Charge. Measured in percentage right?
    The Prius has two banks of battery cell pairs 2x7 right? The Hybrid ecu tracks how many electrons are pushed into and taken out of these two banks. When the performance between the two banks is 20% different a Diagnostic Trouble Code results. I think this is a smart way of preventing fires as anytime one bank underperformed the other heat is the result of increased resistance to charging. Agreed?



    iPhone ?
     
    #30 Paul Schenck, Oct 4, 2019
  11. vendingtech

    vendingtech Member

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    So car has been parked for 5 hours. I did pull battery to take to autozone and hooked back up.

    Here is video of battery read . Turned car on about 10 sec in engine started and engine off at 1:31.

    Thanks for the help




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    #31 vendingtech, Oct 4, 2019
  12. vendingtech

    vendingtech Member

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    Explain this. Car was at 2 bars when i stopped. Drive uphill just a few min from work.

    Thought for sure it was going to pop a code.

    First 2 pics are right as I started the car.

    Second 2 are after it shut down the engine.

    Am I fighting something else wrong in the car?
    IMG_20191004_143342.jpeg IMG_20191004_143350.jpeg Image%20(4).jpeg Image%20(5).jpeg

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    #32 vendingtech, Oct 4, 2019
  13. vendingtech

    vendingtech Member

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    So while hitting the drivethru after car had been on mostly battery thru town it tossed the hybrid battery code. I grabbed the freeze frame. Can someone help decipher this and maybe it will help point to my issue?

    Thanks! IMG_20191004_151645.jpeg IMG_20191004_151636.jpeg IMG_20191004_151627.jpeg IMG_20191004_151620.jpeg IMG_20191004_151611.jpeg IMG_20191004_151602.jpeg IMG_20191004_151551.jpeg IMG_20191004_151543.jpeg

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    #33 vendingtech, Oct 4, 2019
  14. TMR-JWAP

    TMR-JWAP Senior Member

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    Battery Block 14 is bad...………...and 3 may be a future problem...….

    This says it all, but you can also see it in the video, how Block 14 changes significantly more than the others when being charged.

    If you want a visual on what your battery is doing look at this thread post #5.
    Just Another HV Battery Thread and Experiments | PriusChat

    Everything acts normal up until you reach the end of capacity of the one weak module. Then that module falls off a cliff. If you stay above that cutoff point, it's almost impossible to notice there's a problem.

    Block 14.jpg
     
    #34 TMR-JWAP, Oct 4, 2019
    Last edited: Oct 4, 2019
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  15. TMR-JWAP

    TMR-JWAP Senior Member

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    Paul, I think you misunderstand the construction of the battery. It's 28 modules, connected in series. Imagine it being a 28 D cell battery flashlight. The 28 cells are touching -+-+-+-+ etc. Connect the end (-) and (+) to a light bulb. Then, you move cells 19 and 20 apart slightly and install a switch. That's how the battery is wired., except its really 168 individual 1.2v cells
     
    #35 TMR-JWAP, Oct 4, 2019
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  16. Sharnold

    Sharnold Active Member

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    #36 Sharnold, Oct 4, 2019
    Last edited: Oct 4, 2019
  17. vendingtech

    vendingtech Member

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    Thanks everyone!!! Now I got a direction. I knew if I kept gathering data we'd get there. Anyone have a suggestion other than eBay for getting 4 cells to replace my bad ones? Don't want to be doing this a 3rd time.

    Thanks!!

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    #37 vendingtech, Oct 4, 2019
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  18. Raytheeagle

    Raytheeagle Senior Member

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    Bumblebee, @TMR-JWAP and @ericbecky sell modules;).

    You have the Hybrid Automotive equipment too, so check with @jeff652 as he also sells modules:).

    Good luck and keep us posted (y).
     
    #38 Raytheeagle, Oct 4, 2019
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  19. Tim Jones

    Tim Jones Senior Member

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    Get a new battery....
     
    #39 Tim Jones, Oct 6, 2019
  20. vendingtech

    vendingtech Member

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    Wish I could just get a new battery. Rebuilding is my only option at this time. I received replacement batteries from @TMR-JWAP

    Thanks again for getting those out asap to me. I have replaced them all. I'm bolting back my battery pack now and will put on the prolong charger to Balance charge tonight and hopefully tomorrow I'll be back on the road.

    Thanks again for all the help!

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    #40 vendingtech, Oct 13, 2019
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