Joe Nolan:

“We measure thermo and electrical properties of the battery. We look at its integrity in the vehicle and in neither case for these crash tests or in any of the crash tests we’ve conducted of the Leaf or the Volt did we see a problem with the batteries.”

Joe Nolan, IIHS vice president for vehicle research, is offering some reassurance for EVs which just lately failed a new crash test (we reported).
cnbc.com (with video)