Current Status of The Ovonics Battery Technology
Multiple companies have tried to develop NiMH battery technology without making use of Ovonics' patents. Electro Energy Inc., working with CalCars, converted a Toyota Prius from a hybrid electric vehicle to a PHEV using its own bipolar NiMH batteries. Plug-In Conversions uses Nilar NiMH batteries and the EAA-PHEV open source control system in its Prius PHEV conversions. These organizations maintain that these developments are allowable because their NiMH battery technologies are not covered by Cobasys' patents. However, these batteries did not become commercially available until late 2007. The technical capabilities of current bipolar NiMH technology are also significantly more limited than those of the ECD Ovonics technology. For example, the operating temperature range for ECD Ovonics NiMH batteries, an important consideration for their use in consumer road vehicles, is -30 to +70 °C (-22 to 158 °F), while the operating temperature range for Nilar's bipolar batteries is a more limited -6 to +52 °C (21 to 126 °F).
On July 28, 2009, Automotive News reported that Cobasys would be bought from Chevron and Energy Conversion Devices by battery maker SB LiMotive, a joint venture of Bosch and Samsung. At the time of the 2009 Cobasys sale, control of NiMH battery technology transferred back to ECD Ovonics. In October 2009, ECD Ovonics announced that their next-generation NiMH batteries will provide specific energy and power that are comparable to those of lithium-ion batteries at a cost that is significantly lower than the cost of lithium-ion batteries.
On February 14, 2012 BASF announced that it had acquired Ovonic Battery Company from Energy Conversion Devices Inc.
Read more about this topic: Patent Encumbrance Of Large Automotive Ni MH Batteries
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