详情看这里, 回复：Hydrogen safety

While the gasoline-fed fire eventually consumed the second test vehicle, leaving it a smoldering heap of charred steel and melted glass, the hydrogen fire was over in less than two minutes and left the hydrogen-tank equipped test car virtually undamaged. In fact, the heat inside the car never got above 67 degrees.

http://www.evworld.com/article.cfm?storyid=482