P0A7F...found the green crusties!

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Tbkilb01, Jan 5, 2018.

  1. Tbkilb01

    Tbkilb01 Active Member

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    B928F698-3DB7-4B4B-BD94-80EB75287531.jpeg 6B666332-DCB3-4CC3-8BC8-873CA344A4D8.jpeg 477639F4-D33F-4D1D-ABD8-44B811871B1A.jpeg B632BAFB-A3E0-4F5C-89BB-451409B41F00.jpeg F53857BF-3C71-4BE7-B7E6-EEBA8D447182.jpeg ED852CDF-9FDB-4442-9883-0D71C052F29B.jpeg Didn't expect to see this much but it's here! Guess ought to fight them at 100k vs 200k! "Its alive!" Been procrastinating on checking for the infamous corrosion on bus bar, wish ida not done that.kinda like the OCC... just do it! Sooner the better!
     
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  2. bisco

    bisco cookie crumbler

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    wow, is that due to the humidity?
     
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  3. Tbkilb01

    Tbkilb01 Active Member

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    Texas/ Louisiana weather?
    it's just there! It's normal over time!
    It happens all the time, mostly on negative posts but this is crazy crusty!
     
  4. ericbecky

    ericbecky Hybrid Battery Hero

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    The other thing hidden problem is that the positive and negative lead cables are corroded as well.
    You usually can't see it unless you remove the outer sheathing. I've seen some pretty bad stuff. Someday I should post some pics. It's pretty fascinating.
     
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  5. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Based upon your post I am assuming that your car's odometer is at 200K miles. If true, then it seems that you got a good run from that battery.

    The bus bar corrosion is to be expected as the battery modules leak electrolyte. Its not obvious that if you opened up the battery case at 100K miles and cleaned up the corrosion, that you would have been any better off with regards to the ultimate battery life.
     
  6. padroo

    padroo Senior Member

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    It's a shame those little bus bars weren't plated so they wouldn't corrode. If you go to the hardware store and you buy those cheap crimp on electrical connectors they do not look like copper, why, because they have are thinly plated to keep them from corroding.
    I read that Dorman's claim to fame in their rebuilt batteries is they used plated bus bars.
    I am really surprised Toyota would use copper bus bars without being plated.

    You can buy Nickel plated bus bars online.

    Note: I am not claiming Dorman's rebuilt batteries are good just that they tried to help the corrosion problem.

    http://www.amazon.com/Hybrid-Battery-Hv-Parts-2010-2017/dp/B071JQ55H8
     
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  7. Tbkilb01

    Tbkilb01 Active Member

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    image.jpg
    Yea, found some crusties there too. I
    just cleaned all up and crossing fingers...putting back in shortly...
     
    #7 Tbkilb01, Jan 5, 2018
    Last edited: Jan 5, 2018
  8. Tbkilb01

    Tbkilb01 Active Member

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    389792AA-68D7-4290-A085-D0E9156BEE1E.jpeg BA1B9DBD-5084-4706-A9C8-28C42E408B21.jpeg 7EF28C51-E437-4C31-9F1F-3387C05A5095.jpeg
    Yes, but any corrosion causes voltage drop, a real thief! and well, just got to keep the battery smart unit happy!
     
    #8 Tbkilb01, Jan 5, 2018
    Last edited: Jan 5, 2018
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  9. Tbkilb01

    Tbkilb01 Active Member

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    image.jpg Got her done. Was kinda heavy and awkward. Not really that bad. Just nuts and bolts!
    Initial drive felt good.
    No codes.
    ELM with ENGINE LINK
    Reflecting 0.50 increase across the Battery block voltages.
    before they were 16.39v -16.41v ish
    now are16.93v-16.98v ish.
    In drive, brake on,gas to floor.
    I'll do a good drive cycle tomorrow.
     
    #9 Tbkilb01, Jan 5, 2018
    Last edited: Jan 5, 2018
  10. mjoo

    mjoo Senior Member

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    Power loss from oxidized buss bars leading to an overheating battery leading to electrolyte loss which corrodes the battery terminals and leads to more power loss??

    Pixel XL ?
     
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  11. Mendel Leisk

    Mendel Leisk 'Orrible Oracle

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    Anyone hazard a guess, if this is time, mileage or both?

    @Tbkilb01 How did you clean the various pieces? Someone here dropped the nuts in vinegar and they turned black, so don't do that?
     
  12. Tbkilb01

    Tbkilb01 Active Member

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    Brass parts were completely tarnished badly and mixed with the crusties...shame Toyota didn't coat them better. Anyway, not unexpected after all this time and use.. Cleaned them with sanding.
    Everything else with baking soda mix. I may coat them all in dielectric later... it's really quite simple to get to battery. Just awkward weighted.
    If all stays good, I'll most likely get newest busbars from doorman. If not, May just get doorman battery. They Have great warranty...All depends, drove for two hours today and no codes ...200k and I think I need to sink some $ into it anyway. Been a great ride! Thanks for post.
     
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  13. ericbecky

    ericbecky Hybrid Battery Hero

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    Fyi Dorman just reduced their hv battery warranty to 1 year for purchases after mid December 2017.
     
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  14. Mendel Leisk

    Mendel Leisk 'Orrible Oracle

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    There may be dis-information aplenty in this, but fwiw:

    Best way to clean corrosion on terminals? | PriusChat

    For example, for sure someone recently tried dropping the nuts in vinegar, only to have them immediately turn black. Might just be cosmetic, but a bit alarming.

    I'm always leery about applying any sort of grease too: easy to do, hard to remove. And in recent years I've never seen a conventional battery on our new cars with a battery terminal coating. Because they can't be bothered? Or?
     
  15. Mendel Leisk

    Mendel Leisk 'Orrible Oracle

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    Would it be possible to sneak a peek at any of the terminals or connectors, check on their conditions, without the need to haul the battery right out of the car and remove the case? That would be nice.
     
  16. ericbecky

    ericbecky Hybrid Battery Hero

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    To take the lid off you need to have the battery pack unbolted from the car. In which case, it is only a few extra minutes to lift it out and bring it into the shop to work on it.
     
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  17. Grit

    Grit Senior Member

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    I do a great deal of home studio monitor audio systems and repurposing older audio component systems. Corroded audio contacts are big culprits to sound issues. What I use to clean and condition gold contacts on the audio systems are Deoxit sprays, I use their product religiously. They have solution in spray canister, squeeze bottle, sponge, nail brush applicators & other kits that cleans, conditions and provide protective coat to gold contacts so corrosion, oxidation, weatherization has no chance to layer up again. Safe on plastic also.







     
    #17 Grit, Jan 7, 2018
    Last edited: Jan 7, 2018
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  18. Tbkilb01

    Tbkilb01 Active Member

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    2ACFBDA2-5117-4A73-AA9A-03731842166D.jpeg All seems good after 300 miles.
    Got a new toy today to see if I can "Prolong" the HV BATTERY. Now if I can find a way to offset the cost?
     
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  19. danlatu

    danlatu Senior Member

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    I had 1 bad cell in my 2005 prius and also found water in the spare tire area. I slowed the water intrusion a bit but water still somehow made its way in the rear hatch/tire area. My copper bus bars looked like yours and I cleaned them with ketchup. I then used Noalox on all the copper bus bars to prevent corrosion and it is safe for electrical use.

    Screen Shot 2018-01-17 at 6.40.45 PM.png
     
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  20. leeb18c

    leeb18c Active Member

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    Your pictures makes me want to pull out my 2010 battery and check them out. When I looked at all the battery voltage values (in Torque app) of the blocks they are within +/-0.1V so I'm hesitant to pull the battery pack.
     
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