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#4605164 - 12/16/17 08:57 AM Gen 2 Prius Traction Battery Gauge in Energy Mon
DuckRyder Offline


Registered: 10/20/05
Posts: 4206
Loc: Atlanta
Gen 2 Prius Traction Battery Gauge in Energy Monitor behavior.

Other G2 Prius owners - How often does the traction battery gauge in the energy monitor indicate a topped up battery (the top green bar is lit)?
_________________________
Robert
  • 2007 Toyota Prius Touring
  • 2005 Honda Civic Sedan
  • 1972 Ford F100

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#4605177 - 12/16/17 09:09 AM Re: Gen 2 Prius Traction Battery Gauge in Energy Mon [Re: DuckRyder]
simple_gifts Offline


Registered: 07/26/04
Posts: 11943
Loc: Middlesex County CT
Not too often here; If I descend a long grade with the brake pedal lightly depressed, I can get it up to a full charge; that being said, when the battery is fully charged and you are still using regenerative braking, the computer will put the engine in 'braking mode' which is a lot like moving the level into the "B" position. There are mixed messages all over the web; my belief is 'b' shifting actually uses the battery to spin the engine up.

I usually get a fully charge on the same descent on my way home from work. There is a very steep descent over about 1.5 miles.



Edited by simple_gifts (12/16/17 09:12 AM)
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#4605204 - 12/16/17 09:33 AM Re: Gen 2 Prius Traction Battery Gauge in Energy Mon [Re: DuckRyder]
5AcresAndAFool Offline


Registered: 12/18/16
Posts: 421
Loc: Indiana
We had a Gen3 Prius, which we loved by the way. The only time it would ever fill the gauge up is when there was a lot of downhill braking, or if you did some high speed braking using mostly the regenerative brakes.

I believe the charging algorithm purposely does not charge the traction battery fully so there is room to store charge from Regen braking. I also believe it has to do with battery longevity. From what I know NiMH batteries have a longer lifespan when they are not charged completely all the time.

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#4605248 - 12/16/17 10:01 AM Re: Gen 2 Prius Traction Battery Gauge in Energy Mon [Re: DuckRyder]
DuckRyder Offline


Registered: 10/20/05
Posts: 4206
Loc: Atlanta
Thank you, good to hear that mine appears to be behaving the same. I have never seen the top bar on mine lit until a recent trip to the mountains... where it was lit with some regularity.
_________________________
Robert
  • 2007 Toyota Prius Touring
  • 2005 Honda Civic Sedan
  • 1972 Ford F100

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