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Gen 2 Prius Traction Battery Gauge in Energy Mon #4605164
12/16/17 08:57 AM
12/16/17 08:57 AM
Joined: Oct 2005
Posts: 4,626
Atlanta
DuckRyder Offline OP
DuckRyder  Offline OP
Joined: Oct 2005
Posts: 4,626
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
Re: Gen 2 Prius Traction Battery Gauge in Energy Mon [Re: DuckRyder] #4605177
12/16/17 09:09 AM
12/16/17 09:09 AM
Joined: Jul 2004
Posts: 12,070
Middlesex County CT
simple_gifts Offline
simple_gifts  Offline
Joined: Jul 2004
Posts: 12,070
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.


Last edited by simple_gifts; 12/16/17 09:12 AM.

2004 Prius; 102K; ASL
2007 Yaris 78K 0w-40 Castrol
2006 B2300;132K;ALM


Was driving an ox cart; Now on the USS Enterprise
Re: Gen 2 Prius Traction Battery Gauge in Energy Mon [Re: DuckRyder] #4605204
12/16/17 09:33 AM
12/16/17 09:33 AM
Joined: Dec 2016
Posts: 453
Indiana
5AcresAndAFool Offline
5AcresAndAFool  Offline
Joined: Dec 2016
Posts: 453
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.

Re: Gen 2 Prius Traction Battery Gauge in Energy Mon [Re: DuckRyder] #4605248
12/16/17 10:01 AM
12/16/17 10:01 AM
Joined: Oct 2005
Posts: 4,626
Atlanta
DuckRyder Offline OP
DuckRyder  Offline OP
Joined: Oct 2005
Posts: 4,626
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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