公开(公告)号：EP2022112B1

公开(公告)日：2010-12-08

申请号：EP07795282.8

申请日：2007-05-23

申请人： Eveready Battery Company, Inc. ,  H&t Waterbury, Inc. ,  H & T Battery Components USA, Inc.

发明人： BOUFFARD, Richard L. ,  EBNER, Walter B. ,  BEGG, R. Justin ,  STEARNS, John C. ,  RAY, Robert E.

IPC分类号： H01M2/12 ,  H01M2/02 ,  H01M2/04 ,  H01M10/28

CPC分类号： H01M2/1241 ,  H01M2/022 ,  H01M2/0257 ,  H01M2/0287 ,  H01M2/0292 ,  H01M2/0439 ,  H01M10/28

摘要： An electrochemical cell is provided with an enhanced pressure relief vent formed in a closed end of the cell container that achieves effective venting of gas from the closed end of the container. The electrochemical cell including a container having a first end, a second end, a side wall extending between the first and second ends, and an end wall extending across the first end. The cell has a positive electrode, a negative, and an aqueous alkaline electrolyte, all disposed in the container. The cell further includes a pressure relief vent having a reduced thickness groove formed in the end wall of the container. The reduced thickness groove is formed having eight segments extending radially from a central location. A cover is welded on the end wall of the container via at least three welds, wherein the angular spacing between two adjacent welds is greater than 120°.

公开(公告)号：EP2022112A1

公开(公告)日：2009-02-11

申请号：EP07795282.8

申请日：2007-05-23

申请人： Eveready Battery Company, Inc. ,  H&t Waterbury, Inc. ,  Truelove&maclean

发明人： BOUFFARD, Richard L. ,  EBNER, Walter B. ,  BEGG, R. Justin ,  STEARNS, John C. ,  RAY, Robert E.

IPC分类号： H01M2/12 ,  H01M2/02 ,  H01M2/04 ,  H01M10/28

CPC分类号： H01M2/1241 ,  H01M2/022 ,  H01M2/0257 ,  H01M2/0287 ,  H01M2/0292 ,  H01M2/0439 ,  H01M10/28

摘要： An electrochemical cell is provided with an enhanced pressure relief vent formed in a closed end of the cell container that achieves effective venting of gas from the closed end of the container. The electrochemical cell including a container having a first end, a second end, a side wall extending between the first and second ends, and an end wall extending across the first end. The cell has a positive electrode, a negative, and an aqueous alkaline electrolyte, all disposed in the container. The cell further includes a pressure relief vent having a reduced thickness groove formed in the end wall of the container. The reduced thickness groove is formed having eight segments extending radially from a central location. A cover is welded on the end wall of the container via at least three welds, wherein the angular spacing between two adjacent welds is greater than 120°.