Battery fires prompt government investigation of Chevy Volt

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WASHINGTON (AP) — New fires involving the lithium-ion batteries in General Motors Co.’s Chevrolet Volt have prompted an investigation to assess the risk of fire in the electric car after a serious crash, the National Highway Traffic Safety Administration said Friday.

One Volt battery pack that was being closely monitored following a government crash test caught fire Thursday, the safety administration said in a statement. Another recently crash-tested battery emitted smoke and sparks, the statement said.

GM, which was informed of the investigation on Friday, said in a statement that the Volt “is safe and does not present undue risk as part of normal operation or immediately after a severe crash.”

The latest fires are in addition to a battery fire in a crash-tested Volt six months ago.

NHTSA learned of a possible fire risk involving damaged Volt batteries when a fire erupted in a Volt that was being stored in a parking lot of a test facility in Burlington, Wis. The fire was severe enough to cause several other vehicles parked nearby to catch fire as well.

The car had been subjected to a side-impact crash test more than three weeks earlier, on May 12, during which the battery was punctured and its coolant line ruptured.

Last week’s tests of three battery packs were designed to replicate the May test. In that test, the Volt was subjected to a simulated side-impact collision into a narrow object like a tree or pole followed by a rollover, the agency said.

The first battery tested last week didn’t catch fire. But a battery test on Nov. 17 initially experienced a temporary temperature increase, and on Thursday caught fire while being monitored. Another battery tested on Nov. 18, which was rotated 180 degrees within hours after the test, began to smoke and emit sparks shortly after the rotation.

The tests were conducted by NHTSA and the Energy and Defense departments at a defense facility near Hampton Roads, Va.

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