High voltage battery pack fan

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by FirstFlight, May 23, 2012.

  1. FirstFlight

    FirstFlight Member

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    I've read a few stories on here about how the battery fan was clogged with a lot of dirt, fur, lint, etc. I decided to take mine out and inspect it. It was in pretty good shape, just a light coating of dust.

    I measured the resistance and got 4.23 ohms. Also, I turned it by hand and it seemed to be a little tougher to turn than I anticipated.

    My battery does get warm and I can never hear my fan running. However, I just got my scangauge so I have no measurements to compare it to. I did verify that the fan works when the battery gets warm. My additional questions are:

    1. Should the fan turn freely and easily or have a small amount of resistance?

    2. Is 4.23 ohms correct? (more than 2 amps seems excessive)

    3. How many speeds does the fan have?
     
  2. cnschult

    cnschult Active Member

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    4.23 ohms is nothing, I've built circuits with tiny resistors that were 2-10 kilo-ohms.
     
  3. FirstFlight

    FirstFlight Member

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    Huh?
     
  4. qbee42

    qbee42 My other car is a boat

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    Yeah, that is a pretty funning response. I hope he was joking. If not, I have some 100 Mega Ohm resistors, so that that.

    :p

    Tom
     
  5. FirstFlight

    FirstFlight Member

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    Yeah. A fan that needs a 10-20K resistor should cool the battery pack nicely. :nono:

    Bigger isn't always better;)
     
  6. 2009Prius

    2009Prius A Wimpy DIYer

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