Chevrolet has begun sending notifications to Volt owners reassuring them the car is safe after an apparent post-crash test battery fire.

The National Highway Traffic Safety Administration has begun an investigation into the Volt, after a crash test earlier this year resulted in damage to the battery.  Due to rupturing of cooling lines and damage to the battery in the test, three weeks after the crash test, the battery caught fire.   Two weeks ago, the NHTSA attempted to replicate the results of the May test, and while a fire did not occur,  the battery began to smoke and spark.    GM says it has adopted protocols now for powering down or disconnecting the battery in case of a fire, and other safety related procedures should the vehicle be involved in an accident.  No fires have been reported from any Volts owned by consumers.