Hybrid Battery Fan Cleaning in toyota prius

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Anas Almustafa, Sep 19, 2015.

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  1. Anas Almustafa

    Anas Almustafa Member

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    cleaning the hybrid hv battery fan is very important to make sure that the traction battery stays within optimal operating temperature and thus optimal fuel economy

    here's a video that explains about cleaning the hybrid battery fan in toyota prius cars

     
    #1 Anas Almustafa, Sep 19, 2015
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  2. bisco

    bisco cookie crumbler

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    very helpful, thank you!(y)
     
    #2 bisco, Sep 19, 2015
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  3. Silver bullit

    Silver bullit Right Lane Cruiser

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    Myself and others have installed a filter for the battery fan.
     
    #3 Silver bullit, Sep 19, 2015
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  4. Mendel Leisk

    Mendel Leisk Senior Member

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    I've looked at ours a couple of times now. Good to acquaint yourself with it, eliminate one of the unknowns.

    The ductwork shown in the video is for second gen I think; third gen is a little different, but similar principal.
     
    #4 Mendel Leisk, Sep 19, 2015
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  5. bisco

    bisco cookie crumbler

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    see, i thought it was third gen. amazed at the dearth of information.
     
    #5 bisco, Sep 19, 2015
  6. Anas Almustafa

    Anas Almustafa Member

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    Yes its 2nd gen ducts but they're similar to 3rd gen almost the same principle
     
    #6 Anas Almustafa, Sep 27, 2015
  7. Anas Almustafa

    Anas Almustafa Member

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    that sounds like a good mod , do you have a video on that filter ? is it easily accessible to clean ?
     
    #7 Anas Almustafa, Sep 27, 2015
  8. Silver bullit

    Silver bullit Right Lane Cruiser

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    Here are some photos that show it. The cover for the battery intake is on the right side of the rear seat and is secured by one bolt. Remove the cover and cut floor furnace filter to fit. Place the filter and reinstall the cover. I have replaced the filter a couple of times and it does get dirty.
     
    #8 Silver bullit, Sep 27, 2015
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  9. bisco

    bisco cookie crumbler

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    i think the gen III added a pre filter?
     
    #9 bisco, Sep 27, 2015
  10. gliderman

    gliderman Active Member

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    Why do you think that?
     
    #10 gliderman, Sep 27, 2015
  11. bisco

    bisco cookie crumbler

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    i thought someone pointed out a finer plastic grid behind the grille in the past, but that's why i added the question mark.
     
    #11 bisco, Sep 27, 2015
  12. Mendel Leisk

    Mendel Leisk Senior Member

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    Maybe at the mid-life upgrade, 2013 and onward?

    On our 2010, my latest rendition of filter is to put a piece of residential bug screen in behind the grill. The screen has a strong bow to it, so I put it against the (concave) inside of the grill, purposely bowing away, then pulled it in to close/flush contact with a couple of loops of black thread.

    152.JPG
     
    #12 Mendel Leisk, Sep 27, 2015
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  13. Anas Almustafa

    Anas Almustafa Member

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    Thank you, that's a pretty good mod. since the filter will prevent dust and bigger objects from going into the hv fan vents (especially if kids through stuff in there :)
     
    #13 Anas Almustafa, Sep 28, 2015
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  14. Toasty

    Toasty Junior Member

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    nice
     
    #14 Toasty, Oct 7, 2015
  15. Montgomery

    Montgomery Senior Member

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    I cleaned my fan today at 55.5k miles. I started by not without removing the bottom seat. Easy to get access to fan assembly. Detached the plugs and the 3 bolts and pulled it out. I went ahead and removed the 3 screws that hold the fan housing together and soaked the blades in windex. Put it in a bowl so it only soaked the blades (motor on top). Then sat it in the Hot 100 degree heat we had today for 20 minutes. Went to put it all back together and thats when I had problems. Believe it or not, its easier to put everything back together with the bottom seat cushion out. Total time, 2 hours. Next time it will be less than an hour. Blades had only grey soot on them. No hair. Nothing clogged. Due to me sweating like a dog, I didn't take photos. Sorry.

    One other thing, on my 2015, it already has a nice screen door type mesh on it. It was dirty, so it appears to work good.
     
    #15 Montgomery, Aug 20, 2020
    Last edited: Aug 20, 2020
  16. qdllc

    qdllc Senior Member

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    How often is this needed? I have over 100K but no issues. I know to keep the inside of the car clean and not obstruct the vent.
     
    #16 qdllc, Jan 19, 2023
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