Took the Prius apart, and also and interesting finding.

Discussion in 'Gen 2 Prius Main Forum' started by That_Prius_Car, Aug 26, 2010.

  1. That_Prius_Car

    That_Prius_Car Austin Kinser

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    After hearing about the battery fan getting clogged in some Prius'es out there, I decided to go ahead and take mine apart and take a look for myself. (I had instructions from a PDF file I found on here.) So I took my Macbook and sat it in the back and went to work. After I carefully took everything out and made sure I didn't stress any panels which was easy because the file I downloaded showed me where all the screws were that I needed to take out. To my suprise, it wasn't that dirty at all. It got me and my Prius closer though, but I went ahead and took the air compressor and blew out some dust that gathered in there and re-installed the fan. By the way, my Prius did something weird this morning, I was on my way back from the park and driving down a LONG road, so I wanted to enjoy the ride, so I set the cruise at 43mph. The MFD displayed that it was using the engine to purely power the wheels, while charging the battery (which was pretty normal.) Well, I looked at my SOC (state of charge) on the screen, 6 blue bars were there so thats fairly normal, thats where it usually sits most of the time while cruising, about 4 minutes later, I look at the screen again, this time 7 green bars, almost full, so I think "hmm, well it must have charged a little more than it needed too." 3 minutes later, I look back at the screen BOOM, all 8 green bars are there, and it was still charging! Then a few seconds after it hit full and was done charging, it used the EV mode aggressively. I didn't know what her deal was, but she's fine now. I think someone at the Green Drive Expo told me that its a battery reset of some sort. Oh well. :)
     
  2. That_Prius_Car

    That_Prius_Car Austin Kinser

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    Here are some pictures I took of this event with the battery this morning on my way home.
     

    Attached Files:

  3. Rae Vynn

    Rae Vynn Artist In Residence

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    If you want to run with ICE as little as possible, keep it to 42 or less mph.

    At 43, you were forcing the ICE to run the whole time, even when the battery was fully charged.
     
  4. That_Prius_Car

    That_Prius_Car Austin Kinser

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    Yeah, I know that the electric only top speed is 42, then if you go over 42mph, even if your MFD says the engine is doing nothing, it's still spinning. I set it at 43 on purpose because if I ran it on electric only for too long, then the battery would get low then force the ICE into heavy charging, besides, at 43mph, I was getting 53+mpg while charging! :)
     
  5. cwerdna

    cwerdna Senior Member

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  6. Walt999

    Walt999 New Member

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    That's interesting because in driving ny 2007 for 15,000 miles I have never seen any green bars. My mileage is good and the 12 volt battery is in good shape. I have seen quite a few references to Green Bars on this forum and wonder why I have never had any?
    Walt
     
  7. uart

    uart Senior Member

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    You've never once had a green-bar SOC in 15000 miles! :eek:

    Walt it must be dead flat where you live. You get green bars from regenerative braking on downhill driving. Any time you have to descend a hill for about 1/2 a mile or more with your foot fully off the gas and perhaps bit of light braking you should normally some green SOC action.
     
  8. That_Prius_Car

    That_Prius_Car Austin Kinser

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    It can happen for example, when your getting off a ramp from the freeway. Or at least that's when I usaully experience it. But that time was different, it actually used the engine to charge it full.
     
  9. whatshisname

    whatshisname New Member

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    I had been driving my '04 for about six years before I saw green bars for the first time.
     
  10. patsparks

    patsparks An Aussie perspective

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    That's easy, if you never have the energy screen on display.
     
  11. That_Prius_Car

    That_Prius_Car Austin Kinser

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    Wow, I live in the flat lands of Illinois, and I see green bars every now-and-again. Especially when I'm on the highway and set the cruise at 55mph and the engine charges the battery to the comfortable level and then I have to coast all the way down to 35mph because I begin to hit the town, it sometimes goes to 7 green bars.
     
  12. Tideland Prius

    Tideland Prius Moderator of the North
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    I've never seen the car charge itself to 8 bars. In the mode you've describe, it'll be at 6 bars (but very very close to the 7 bar threshold). A slight brake (e.g. going on an off ramp) will easy achieve 7 bars... 8 if you have a long ramp.
     
  13. krg03

    krg03 Not expert, just experienced

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    I too thought taking my 07 apart would find gunks of hair and dirt in the battery. Both cars were clean. Put the filter in the intake anyway by the back seat as suggested. Didn't notice any more than normal green bars. I get green bars daily as I cruise normal street up/down hills. I change my route to take be down the most hills even though its a bit longer. 50+mpg normal in the morning. Inclines back home then a nice long hill. EV mode the last two miles home (unless it's hot out which is an issue with ev).
     
  14. That_Prius_Car

    That_Prius_Car Austin Kinser

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    I promise I'm not telling porkies. I had my cruise control set at 43mph (1mph over the limiter for the electric only mode) because I was driving on long, flat ground and I didn't want the battery to go down and induce the engine into heavy charging. So, as the Prius usually acts, the engine was powering the wheels, while also sending power to the battery, AND it had 6 blue bars. Normal. Then about 5 minutes later, I look over again and see the same process, but this time the battery was at 7 green bars, so I thought (Hm, must have charged a little bit more than it wanted too because I know the Prius is comfortable at that 20-80% battery range." Well, wrong, after a few more minutes, bang, the 8th green bar. Then literally 2 seconds after hitting that last bar, it used EV to power the car aggressively.
     
  15. Bob64

    Bob64 Sapphire of the Blue Sky

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    Clarification on 20-80% charge.
    8 bars = 80% charge on the battery.
    0 (or 1) bar = 20% charge.

    The mfd "Hides" the unavailable parts of the battery.
     
  16. desertrider2215

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    I have seen my battery full green allll the time where I live. Especially by the beach if I'm up in the hills then coming down the hill (takes a good 5+ minutes to get down) and my battery will easily be full by then. Or on the freeway getting off an offramp it will sometimes get to full green. I see "green" a lot, probably every other day, but full green maybe once a week.
     
  17. qbee42

    qbee42 My other car is a boat

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    My 2006 will do this in the winter, when cold weather forces the ICE to run for heat.

    Tom
     
  18. vertex

    vertex Active Member

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    The max speed for EV is 33 MPH at 34 (not 43) the ICE will kick in, although it may take a few seconds for it to happen. There may be some other effect at 43 MPH, but I am not aware of it.
     
  19. That_Prius_Car

    That_Prius_Car Austin Kinser

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    No, max speed for EV mode in all generations in the Prius are 42mph, once you hit 43, you can feel the engine start, but you have to concentrate very hard to get it to 42mph in EV.
     
  20. smartalec89

    smartalec89 The Official Alaskan

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    Just to clear the confusion... the EV button mod will only allow for 33mph in electric and the car itself without any mods will go all the way to 42mph on electric.
     
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