Some people are crying conspiracy theories over oil companies and battery technology and others are trying to discredit those that even bring up the thought that a company would even dare to cover up technology for their own benefit. I offer you this simple post from another person. Just the chronology of the events is worth a thousand words. Might not prove anything but maybe, just maybe a small amount of caution might be observed as we move forward. Is that too much to ask? Please read and make up your own minds:
"20. Chris M:
That web page at Cobasys does state that they make "advanced NiMH energy storage systems for hybrid electric vehicles (HEV), electric vehicles (EV), 42-Volt and plug-in hybrid electric vehicle (PHEV) transportation applications." What it fails to mention is the name of any EV manufacturer to whom it actually supplies the batteries.
Do you know of one? Perhaps Zenn or ZAP or Th!nk or Miles or Aptera? Claiming that they COULD be used for that purpose, but actually providing them... are two different things.
Also, perhaps you should write to Wikipedia to correct their assessment of the Toyota/Panasonic issues. For example, you say that "Toyota stopped making the RAV4EV as sales were poor." Yet Wikipedia claims that "there were more RAV4-EV's sold than there were cars available."
Moreover, on the subject of the NiMH batteries, according to Wikipedia:
"Whether or not Toyota wanted to continue production, it was unlikely to be able to do so, because the EV-95 battery was no longer available. Chevron had inherited control of the worldwide patent rights for the NiMH EV-95 battery when it merged with Texaco, which had purchased them from General Motors. Chevron's unit won a $30,000,000 settlement from Toyota and Panasonic, and the production line for the large NiMH batteries was closed down and dismantled. Only smaller NiMH batteries, incapable of powering an electric vehicle or plugging in, are currently allowed by Chevron-Texaco."
Finally, I think your timeline might be off --and the subsequent consequences and conclusions. According to the documents and news releases I can find, this is the chronology:
1994 - General Motors buys controlling interest in Ovonics's NiMH batteries.
1997 - Toyota makes the RAV4-EV available in the U.S.
Oct. 10, 2000 - Texaco purchases GM's controlling interest in Ovonic.
Oct. 16, 2000 - Chevron acquires Texaco.
2001 - CARB repeals the ZEV mandate and GM axes the EV1 program.
2001 - Texaco/Chevron Ovonic sues Toyota/Panasonic for patent infringement.
November, 2002 - Toyota axes the RAV4-EV.
2003 - Texaco/Chevron Ovonic becomes Cobasys.
July 7, 2004 - Toyota/Panasonic settle with Cobasys for $30,000,000.
"
http://www.autobloggreen.com/2007/1...tter-lithium-ion-hybrid-ev-battery-why-its-e/