Page 92 of 92

Re: Chevrolet Spark EV

Posted: Tue Dec 22, 2015 1:41 pm
by evnow
lorenfb wrote:Could this be a motor that the Bolt will have, and the Spark provides a test vehicle
for an early production of that motor?
I don't think GM was even thinking about Bolt when they designed Spark EV.

Re: Chevrolet Spark EV

Posted: Wed Dec 23, 2015 10:02 am
by lorenfb
LKK wrote: Most people think the Spark EV drivetrain will be used in the Bolt. Personally I don't think so. The Bolt will be bigger and weigh a lot more, so the puny horsepower output of Spark EV drivetrain in my opinion is too low. Rather than develop a more powerful single motor drivetrain, I think it makes more sense to use the Voltec propulsion system because it already produces adequate torque and horsepower and the two motor design is more efficient at highway speeds than the Spark's.
GM could also possibly change the gearing in the Spark motor assembly thereby reducing the low-end torque
while improving its highway speeds and still maintain the simplicity of single motor design and cost. The HP
(130 - 97kW) of the Spark motor is adequate for the size and weight of the proposed Bolt.

Re: Chevrolet Spark EV

Posted: Thu Dec 24, 2015 8:27 am
by DaveinOlyWA
evnow wrote:
lorenfb wrote:Could this be a motor that the Bolt will have, and the Spark provides a test vehicle
for an early production of that motor?
I don't think GM was even thinking about Bolt when they designed Spark EV.
unlikely. cars are initially conceived years in advance. an EV platform is simply too expensive to justify with a simple compact. Even Nissan had several platforms in the EV pipeline at the beginning...

Re: Chevrolet Spark EV

Posted: Sat Dec 26, 2015 7:23 pm
by evnow
DaveinOlyWA wrote: unlikely. cars are initially conceived years in advance. an EV platform is simply too expensive to justify with a simple compact. Even Nissan had several platforms in the EV pipeline at the beginning...
GM wouldn't have nailed down the details (like how many kwh & range etc). Yes, they would have wanted to use the drivetrain components for future EVs.

Re: Chevrolet Spark EV

Posted: Thu Mar 30, 2017 5:16 pm
by edatoakrun
Some more Spark Battery Pack Laboratory Testing Results posted by the AVTA program in Phoenix:

https://avt.inl.gov/vehicle-button/2015-chevrolet-spark

The three 2015s averaging ~8% capacity loss after less than 12k miles driven may not seem reason for celebration, but IMO the packs look to be aging somewhat better than indicated by the previously posted AVTA reports of capacity loss for the 2013 LEAF, 2013 Ford Focus E, or 2015 Kia Soul.

Re: Chevrolet Spark EV

Posted: Fri Mar 31, 2017 12:40 pm
by GRA
I sure wish they'd tested some of the 2013s with the LiFePO4 batteries for comparison. That chemistry is known to be more heat tolerant and have a better cycle life than LiMn2O4.