DETROIT — General Motors Co. is moving production of the battery pack for its all-electric model of the Chevrolet Spark minicar in-house at the company's battery assembly plant in suburban Detroit.
The lithium-ion battery packs for the Spark EV had been supplied by A123 Systems, a Michigan company that filed for bankruptcy in 2012 and later was acquired by Wanxiang Group, China's largest auto supplier.
Last month, GM announced the Brownstown Township factory in suburban Detroit would receive a $65 million investment toward expansion of lithium-ion battery manufacturing. The company long has pushed for in-house development and manufacturing of electric vehicles.
Unlike most other automakers, GM assembles its own battery packs and some of the motors for its EVs and plug-in hybrids. Last year, it started manufacturing the Spark EV's 85-kilowatt electric motor at GM's powertrain plant in White Marsh, Md., near Baltimore.
“Using our in-house engineering and manufacturing expertise enabled us to deliver a battery system that is more efficient and lighter than the 2014 Spark EV without sacrificing range,” Larry Nitz, executive director of GM global transmission and electrification engineering, said in a May 14 news release.