Patent ID: 7118817
Filing Date: 2006-10-10
Classification: H01M,H05K,Y02E

Abstract:
1. A protection system for a coin cell comprising spaced, substantially parallel and substantially co-extensive top and bottom conductive surfaces said system comprising: a first insulating wafer adapted to fit over said top conductive surface of said coin cell said first wafer comprising a first opening; a second insulating wafer adapted to fit over a portion of said bottom conducting surface of said coin cell, said second wafer comprising an insulating area extending fully under the first opening and a second opening located so that when the two wafers are placed over the coin cell conductive surfaces, the first opening does not overlap the second opening; and wherein said coin cell is designed to fit in a cell holder having upper and lower contact electrodes designed to contact said top and bottom conductive surfaces respectively in non overlapping areas and wherein said openings in said top and bottom wafers are positioned so that when said insulating wafers are placed over a coin cell adapted to fit said coin cell holder, said upper and lower electrodes contact said top and bottom conducting surfaces respectively through said wafer openings when said battery is inserted in a first orientation in said holder and contact the insulating wafer when said coin cell is inserted in said holder in a second, inverted orientation.