Energy Capacity of the Hybrid Battery

max2prius · 01-26-2008, 01:13 PM

I have always wondered, does anyone know what the hybrid battery capacity is in Kilowatt hours? I have tried to do a search but it only states in amp hours which I have no idea to convert to KWH.

I have owned my first Prius since Dec 1, 2007 and am loving it.

Thanks

haiku88 · 01-26-2008, 01:43 PM

Quote:

Originally Posted by max2prius

I have always wondered, does anyone know what the hybrid battery capacity is in Kilowatt hours? I have tried to do a search but it only states in amp hours which I have no idea to convert to KWH.

I have owned my first Prius since Dec 1, 2007 and am loving it.

Thanks

(amphours x volts)/1000 = kwh

diamondlarry · 01-26-2008, 02:02 PM

It seems to me that I've heard it is 1.2 or 1.3 KWH.

jdenenberg · 01-26-2008, 03:22 PM

Quote:

Originally Posted by max2prius

I have always wondered, does anyone know what the hybrid battery capacity is in Kilowatt hours? I have tried to do a search but it only states in amp hours which I have no idea to convert to KWH.

As stated above the capacity is 6.5watt-hours*200volts = 1.3 kwatt-hours. Only about 1/2 of that is actually available for use to protect the battery from early failure. The capacity will slowly degrade over the life of the car so mine may be down to as low as 50% of its original capacity at this time (4 years and 107,000 miles.

My Prius still gets the same great MPG now as it did when new so the battery is still doing the job.

JeffD

miscrms · 01-28-2008, 06:40 PM

A small correction, 6.5Ah * ~200V = ~1.3kWh. In general for DC systems, Volts * Amps = Watts, and similarly Volts * Amp hours = Watt hours. AC can be trickier.

You can find more info on the Prius battery here:

Toyota Prius Battery Specs - EAA-PHEV

Rob

hobbit · 01-29-2008, 09:55 PM

You only get 600Wh of that to play with, though, due to the SOC
limits. Which allows you to suck up about 600 vertical feet
of drop, coincidentally. Here [in the second part] are some
experiments and commentary that you might find amusing.
.
_H*

Qlara · 02-01-2008, 01:54 PM

From Toyota's Prius spec:
Traction Battery

Battery Type
Sealed Nickel-Metal Hydride (Ni-MH)

Battery Power Output
28 hp (21 kW)

Battery Voltage
201.6V

Capacity
6.5Ah or 1.31kWh

priusenvy · 02-01-2008, 03:26 PM

OP asked for energy capacity, not power output.

Power = energy/time, or energy = power * time

The power rating of battery tells you how fast it can deliver the energy contained in it, but tells you nothing about the total energy stored in the battery. Energy density and power density of a battery are two different properties of a given battery technology, but both are important in automobile powertrain applications. In greatly simplified terms, they dictate how far you can go and how fast you can go. Two different things.

That ends today's 8th grade physics lesson.

01-26-2008, 01:13 PM	#1
max2prius Member Join Date: Dec 2007 Location: Walnut Creek, CA Posts: 53 My Car: 2008 Prius Model: Package: #2 Thanks: 2 Thanked 1 Time in 1 Post Friends: 0	Energy Capacity of the Hybrid Battery I have always wondered, does anyone know what the hybrid battery capacity is in Kilowatt hours? I have tried to do a search but it only states in amp hours which I have no idea to convert to KWH. I have owned my first Prius since Dec 1, 2007 and am loving it. Thanks

01-26-2008, 02:02 PM	#3
diamondlarry EPA MPG #'s killer Join Date: May 2007 Location: Elkhart, IN Posts: 560 My Car: 2007 Prius Model: Package: #5 Thanks: 1 Thanked 10 Times in 10 Posts Friends: 6	Re: Energy Capacity of the Hybrid Battery It seems to me that I've heard it is 1.2 or 1.3 KWH.

01-28-2008, 06:40 PM	#5
miscrms Plug Envious Member Join Date: Aug 2007 Location: Phoenix, AZ Posts: 1,334 My Car: 2005 Prius Model: Package: #4 Thanks: 6 Thanked 96 Times in 66 Posts Friends: 4	Re: Energy Capacity of the Hybrid Battery A small correction, 6.5Ah * ~200V = ~1.3kWh. In general for DC systems, Volts * Amps = Watts, and similarly Volts * Amp hours = Watt hours. AC can be trickier. You can find more info on the Prius battery here: Toyota Prius Battery Specs - EAA-PHEV Rob

01-29-2008, 09:55 PM	#6
hobbit Senior Member Join Date: Mar 2005 Location: Bahstahn Posts: 3,590 My Car: Model: Package: Thanks: 0 Thanked 210 Times in 116 Posts Friends: 0	Re: Energy Capacity of the Hybrid Battery You only get 600Wh of that to play with, though, due to the SOC limits. Which allows you to suck up about 600 vertical feet of drop, coincidentally. Here [in the second part] are some experiments and commentary that you might find amusing. . _H*

02-01-2008, 01:54 PM	#7
Qlara Senior Member Join Date: Dec 2007 Posts: 465 My Car: 2008 Prius Model: Package: #6 Thanks: 0 Thanked 2 Times in 2 Posts Friends: 0	Re: Energy Capacity of the Hybrid Battery From Toyota's Prius spec: Traction Battery Battery Type Sealed Nickel-Metal Hydride (Ni-MH) Battery Power Output 28 hp (21 kW) Battery Voltage 201.6V Capacity 6.5Ah or 1.31kWh Last edited by Qlara; 02-03-2008 at 02:02 AM.

02-01-2008, 03:26 PM	#8
priusenvy Senior Member Join Date: Mar 2004 Location: Silicon Valley, CA Posts: 1,758 My Car: 2005 Prius Model: Package: #6 Thanks: 0 Thanked 1 Time in 1 Post Friends: 0	Re: Energy Capacity of the Hybrid Battery OP asked for energy capacity, not power output. Power = energy/time, or energy = power * time The power rating of battery tells you how fast it can deliver the energy contained in it, but tells you nothing about the total energy stored in the battery. Energy density and power density of a battery are two different properties of a given battery technology, but both are important in automobile powertrain applications. In greatly simplified terms, they dictate how far you can go and how fast you can go. Two different things. That ends today's 8th grade physics lesson.

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