With the current NHTSA investigation into the Chevrolet Volt's battery pack, GM decided to use a different battery chemistry for its upcoming Chevrolet Spark electric vehicle.
GM announced today the Spark EV will use lithium phosphate batteries for its Spark EV rather than the lithium metal oxide batteries used in the Volt. The lithium phosphate batteries store less energy and require more space than lithium metal batteries. However, lithium phosphate batteries are more stable than lithium metal batteries.
“Lithium phosphate chemistry looks like it could be more friendly in terms of heat management.But it stores less energy. There is a tremendous amount of new discovery. This is new territory for lithium batteries,” said James Hall, principal of consulting company 2953 Analytics Inc.
A123 Systems will provide the lithium phosphate batteries for the Spark EV, which will arrive to showrooms in 2013.