Patent ID: 8367232
Filing Date: 2013-02-05
Classification: H01M,Y02E

Abstract:
1. A battery venting system for an underground enclosure system comprising: a battery box disposed within a sealed underground enclosure; a gas-producing chargeable battery disposed within the battery box; a first pipe having an unchecked, unobstructed passageway between a first end fluidly connected to the battery box and a second end exposed to an ambient atmosphere and permitting gas to freely flow from the battery box to the ambient atmosphere; a vacuum generator fluidly connected to the first pipe for reducing a pressure in the battery box, the vacuum generator exhausting through the second end of the first pipe; a second pipe having a first end fluidly connected to the battery box, and a second end exposed to the ambient atmosphere; and a one-way valve in the second pipe for permitting flow from the second end to the first end of the second pipe and precluding flow from a second end of the second pipe.