This might have something to do with it. I don't pretent to know much here Juan so this is
just a cut&paste again (I hate when other people do it, & here I'm doing it...sorry). Sounds
like the patent on the NiMH battery is held by Chevron.
In all cases, the lithium batteries may not last as long as the
NiMH, and render the
plug-in option prohibitively expensive. AQMD and CARB must be acquainted with the
need for NiMH batteries.
So far, ONLY NiMH batteries are proven to be economicial.
Phony Plug-in hybrids are of the parallel hybrid variety, where the
engine is used as the primary source of motive power and the motor
and batteries are just used to start off, or to boost acceleration. They
work, but are still gasoline cars at high speed; even worse,
without
viable and cost-effective batteries, they are just another libel on
Electric cars. The lithium batteries in the plug-in prius cost something
like $14,000 for 9 kWh,
about six times the equivalent cost of NiMH,
and even more expensive when you consider that NiMH last longer
than the life of the car -- even a Toyota car -- while the lithium
batteries are untried and unproven
A real Plug-In Serial Hybrid is an Electric car, with a powerful electric
motor as its only source of motive power, and with batteries capable of
normal driving in EV-only mode for at least 100 miles. This Serial
Plug-In Hybrid is just an EV with a small engine-generator for long trips
or unusual occasions when you can't plug in somewhere. Similar to the
Diesel-Electric locomotive, the engine's only use is to generate electric
for the drive motor.