1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Batteries

Discussion in 'Gen 3 Prius Main Forum' started by Bark, Sep 11, 2011.

  1. Bark

    Bark New Member

    Joined:
    Aug 18, 2011
    7
    1
    0
    Location:
    Eugene OR
    Vehicle:
    2011 Prius
    Model:
    Three
    We have about 500 miles on our new Prius and have noticed 2 things that seam strange.

    1. when I let off the throttle and coast without hitting the brake I notice a slight charge of the batt, is this normal?

    2. The batt never fully charges, is that normal?

    Thanks.
     
  2. spiderman

    spiderman wretched

    Joined:
    Jul 5, 2009
    7,543
    1,558
    0
    Location:
    Alaska
    Vehicle:
    2010 Prius
    Model:
    II
    Yes and yes.

    If you want to see a fully charged battery, go down a long and steep hill. Regen occurs when the gas is released if possible.
     
    1 person likes this.
  3. F8L

    F8L Protecting Habitat & AG Lands

    Joined:
    Aug 14, 2006
    19,011
    4,081
    50
    Location:
    Grass Valley, CA.
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    #1 Yes this is normal. It's called regenerative braking and does not require youto touch the brakes.

    #2 Yes this is normal. The battery only uses only 40% of its capacity. This increases battery longevity. It can discharge to 40% or charge up to 80%. Under normal driving situations the battery will be between about 55% and 65%. Going up or down hills or trying to maintain very high speeds will cause the battery to drain below this number or charge above it. When the battery charges above 77% (usually going down steep long hills) or so the engine will try to bleed off power by spinning the engine at a higher RPM but this does not affect the driving of the car. It just sounds funny to hear the engine racing at 3000+ RPM when you are just cruising. :)
     
    1 person likes this.
  4. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    108,856
    49,448
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    yes. normal. :)
     
    1 person likes this.
  5. qbee42

    qbee42 My other car is a boat

    Joined:
    Mar 2, 2006
    18,058
    3,074
    7
    Location:
    Northern Michigan
    Vehicle:
    2006 Prius
    A small amount of regenerative braking applied when you lift your foot off of the gas. This is done to simulate engine drag found in normal cars. Toyota has tried to make the Prius feel as normal as possible to avoid having to relearn driving skills.

    Tom
     
  6. wheelsup

    wheelsup Junior Member

    Joined:
    Sep 3, 2011
    86
    14
    0
    Location:
    Raleigh, NC
    Vehicle:
    2010 Prius
    Model:
    II
    Ahhh I wondered why they would do that. Seemed inefficient vs. coasting but it makes perfect sense now.
     
  7. Maybe wanting a hybrid

    Joined:
    Apr 3, 2018
    1
    0
    0
    Location:
    Tennessee
    Vehicle:
    2007 Prius
    Model:
    N/A
    I am interested in a prius. The person stated that the battery has just been replaced At 228,000 miles and its 11 years old. Should I be worried about any further issues with the car concerning the battery? Or buying a lemon? What things should i be looking for when buying a used hybrid?