No; as he states in the article, the total combustion energy of the battery is approximately 10% of the equivalent gasoline vehicle. However, as the battery is divided into 16 modules with firewalls between them, the probability of more than one igniting in a cascading failure is significantly reduced.
Hmm, I wonder if a "scrape along something very hard" type of accident could cause the failure of enough cells to cross the firewalls into the other cells...
