evnow wrote: AndyH wrote:
In spite of GMs propaganda machine, the Volt is a HYBRID car, not an EV. Hybrid batteries are a critical part of emissions performance so are part of the long-term warranty. In other words - GM isn't building a long-life battery
because they're super designers, they're doing it because they have to.
Not that it is a long-life battery - what they do is use only 50% of the battery. They have a 16kwh battery and use only 8 kwh of it. Compare that to 80-90% that is used by Leaf or Tesla.
So, with that battery, if someone is allowed to tweak it, we should be able to drive 60 miles on electric easily.
Sure - but then you're still dragging around an ICE and fuel tank that's a sufficient size to run a car that size without the EV equipment. And expanding the usable SOC range shortens pack life.
For example - the PSI cells with which I work
are capable of 2000 cycles at a 1C charge/discharge rate before the cell drops to 80% capacity. That's a cycle per day for almost 5 1/2 years. Looked at another way - if the typical American drives 12,000 miles per year, and we have a 100 mile range, we put 120 cycles per year on the pack. In typical use that's more than 16 years of life for 2000 cycles. (Ignoring cell capacity loss due to time. Might only take 14 years to reach 80% capacity.
There's already a very small pack rebuilding effort in the US - focused on the legacy RAV4, S10, Ranger, Electricar, and Solectria vehicles. There's also the DIY community and they are moving now from lead-acid to lithium. By the time the first Leafs hit their 5th birthday, I expect there to be at least one non-dealer option for pack repair/rebuilding.