Patent ID: 9508970
Filing Date: 2016-11-29
CPC Classification: H01M,Y02E

Claim Text:
1. An apparatus comprising: a rechargeable battery susceptible to thermal runaway; a metal enclosure for the battery, the enclosure being configured to mitigate battery failure consequences resulting from thermal runaway; a vent for venting the enclosure to an environment remote from the enclosure, a wall of the enclosure having an opening for the vent; and a normally closed vent valve for opening the vent when pressure inside the enclosure corresponds to a battery failure event, the vent valve including a burst disc element extending through the opening in the wall, and a retainer and an enclosure fitting on opposite sides of the wall for holding the burst disc element in the opening, the vent being attached to the retainer; wherein the retainer and the wall have aligned orifices for pressure equalization.