2012 Fisker Karma sedan

A123 Systems finds problems in batteries for the Fisker Karma

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Problem found in coolant system for battery packs A123 Systems is supplying for the FIsker Karma.

Battery manufacturer A123 Systems disclosed today flaws in the battery packs they've supplied to Fisker for the Karma plug-in hybrid luxury sedan. A123's engineers have identified the nature of the flaw in the coolant system which could lead to a coolant leak. Repair efforts are already underway. The nature of the flaw is similar to the one GM says was behind the battery pack fire in a crash tested Chevy Volt.

A123 Systems sells finished battery packs to automakers such as Fisker, as well as General Motors and Daimler AG. These are complete battery packs, including cells, battery container, battery management systems, and most important to this case, a cooling system.

The company disclosed that some hose clamps in the battery coolant system were misaligned and positioned in a way to allow leaks in certain circumstances. A123 believes the leak had the potential to cause a short circuit.


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