Patent ID: 7951474
Filing Date: 2011-05-31
Classification: B41P,F16K,H01M,Y02E,Y10T

Abstract:
1. A gas release valve for an access port of a battery cell comprising: a housing configured for coupling to an adapter plug disposed in the access port, the housing having a lid on a first side and an opening in a second side, the lid having a lower side in the direction of the opening and an upper side in the opposite direction, the opening being in flow communication with the battery cell; one or more degassing passageways providing flow communication between the opening and one more vents provided in the lid; a seat provided in the flow path between the opening and the one or more vents; and a sealing element disposed on the seat, the sealing element closing the one or more degassing passageways, wherein the sealing element is preloaded against the seat by elastic properties of the sealing element, wherein the sealing element becomes further preloaded against the seat by in presence of a pressure differential acting from the one or more vents against the sealing element, and wherein the sealing element is an annular collar or an O-ring.