Gen 4 cells in a Gen 2

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by TampaPrius.com, Jan 16, 2017.

  1. Skibob

    Skibob Senior Member

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    That’s 1 dealer. My guess would be they got sick of everybody looking it up on their site. That seems to be the dealer I see a lot when battery price is mentioned. Check other dealers. I had no problems finding it for sale at 4 dealers around me.

    Just checked Tracy Toyota current price just went up to 1699.70. Was cheaper last week. And yes it’s available for purchase.
     
  2. Prodigyplace

    Prodigyplace Senior Member

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  3. Skibob

    Skibob Senior Member

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  4. cShaps

    cShaps New Member

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    I just did this today!!! I used cells from a salvaged 2017 with a nimh pack I picked up for $1300. Thank you so much for posting this, trying to rehab used cells was getting so old and time consuming. The dealership wanted $2000 and my battery core for a new (old) 2004-2009 battery. Dorman and other companies sell dangerous, overpriced “rebuilt” batteries that fail at any given moment.

    My 2004 has never run better, Dr. Prius app also approves!
     
    #64 cShaps, Jun 12, 2020
    Last edited: Jun 12, 2020
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  5. Prodigyplace

    Prodigyplace Senior Member

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    Dorman and all those others selling repaired batteries are not reliable. Other than the junkyard or from Toyota the only other solution I would recommend is the kit of new cells sold by @2k1Toaster here for $1600. You did better than that for hopefully a low mileage battery. His kit uses new cells and has stood the test of time. I linked it in my signature.
     
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  6. edthefox5

    edthefox5 Senior Member

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    So you just swapped the nimh ecu and its cells into the g2 box? The ecu plugs all matched?
     
  7. cShaps

    cShaps New Member

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    No, I swapped only the cells
     
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  8. edthefox5

    edthefox5 Senior Member

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    oh cool so the G2 ecu was cool with the nimh cells. Thats excellent work there. Thank you.
     
  9. jerrymildred

    jerrymildred Senior Member

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    NiMH is what's in the G2 anyway, so using NiMH from a wrecked G4 is fairly common. Are you thinking it was maybe a change from NiMH to Lithium?
     
  10. edthefox5

    edthefox5 Senior Member

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    yes sorry

    I got excited there for a sec.
     
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  11. BluPatoya

    BluPatoya New Member

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    I assume this would work on a Gen 3?
     
  12. jerrymildred

    jerrymildred Senior Member

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    You assume correctly. The cells in the Gen 2, Gen 3, and the Gen 4s that have NiMH are interchangeable. But, unless you do them all at once, you'll have a pretty bad mismatch.
     
  13. richiemoe2

    richiemoe2 New Member

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    This post helped me, thank you all! I just swapped 2016 gen 4 cells with 10k miles into my 2006 Gen 2 with 233k miles, for $948 OTD!
    So far, so good!!
    One thing that I noticed is that the cells are mirrored, from the Gen 2, to the Gen 4.
    ie. Gen 2 cell 1 is neg-pos, cell 2 is pos-neg etc and Gen 4 cell 1 is pos-neg, cell 2 is neg-pos etc.
     
  14. edthefox5

    edthefox5 Senior Member

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    Yes there mirrored because there all in series pos to neg pos to neg etc.
     
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  15. richiemoe2

    richiemoe2 New Member

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    The Gen 2 were in series as well. I just didn't expect the Gen 4 and Gen 2 to be opposite. Definitely glad i took pics and compared!! haha
     
  16. Prodigyplace

    Prodigyplace Senior Member

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    Toyota says they used a higher grade of Nickel in Gen 4. At least that is what a press release said...
     
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  17. strawbrad

    strawbrad http://minnesotahybridbatteries.com

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    Do you have a source for that press release? I would really like to see it.
     
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  18. Prodigyplace

    Prodigyplace Senior Member

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    It was an early 2016 one.
     
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  19. Elektroingenieur

    Elektroingenieur Senior Member

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    Toyota’s U.S. press releases introducing the fourth-generation Prius model (November 18, 2015) and its new technology (October 13, 2015) don’t disclose the changes to NiMH battery or its cells.

    In the SAE journal article on the new hybrid system [1], the authors write, “Electrode material and case structure have been re-designed for the Nickel metal hydride battery.” They explain, “Both battery packs [i.e., NiMH and Li-ion] became more compact, light, and achieved high performance by adopting newly designed cells, and optimizing the pack internal machinery layout.” A separate paper [2] discusses the Li-ion cell design, but as far as I know, there wasn’t a similar paper about the redesigned NiMH cells.

    [1] Fushiki, S., “The New Generation Front Wheel Drive Hybrid System,” SAE Int. J. Alt. Power 5(1):109-114, 2016.
    [2] Nagai, H., Morita, M., and Satoh, K., “Development of the Li-ion Battery Cell for Hybrid Vehicle,” SAE Technical Paper 2016-01-1207, 2016.
     
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  20. Prodigyplace

    Prodigyplace Senior Member

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