Abstract: An electrochemical cell is provided with an enhanced pressure relief vent formed in a closed end of the cell container that allows for effective venting of gas from the closed end of the container. The cell includes 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 electrode, and an aqueous alkaline electrolyte, all disposed in the container. The cell further includes a pressure relief vent mechanism having an offset C-shaped reduced thickness groove formed in the end wall of the container. A cover can be welded to the closed end wall of the container over the pressure relief vent mechanism.

Abstract: 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°.

Abstract: An electrochemical cell with a pressure relief vent formed in a metal plate disposed in at least one of the closed end and the open end of the container. The pressure relief vent has an annular ring that includes a reduced thickness groove, interrupted in at least two places by unthinned sections of the plate. When the vent opens to relieve pressure from within the cell, the area of the plate within the annular ring remains attached to the remainder of the plate by at least one of the unthinned sections. A can with such a pressure relief vent formed in the can bottom is useful as an electrochemical cell container.

Abstract: An electrochemical cell is provided with an enhanced pressure relief vent formed in a closed end of the cell container that allows for effective venting of gas from the closed end of the container. The cell includes 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 electrode, and an aqueous alkaline electrolyte, all disposed in the container. The cell further includes a pressure relief vent mechanism having an offset C-shaped reduced thickness groove formed in the end wall of the container. A cover can be welded to the closed end wall of the container over the pressure relief vent mechanism.

Abstract: An electrochemical cell is provided with an enhanced pressure relief vent formed in a closed end of the cell container that allows for effective venting of gas from the closed end of the container. The cell includes 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 electrode, and an aqueous alkaline electrolyte, all disposed in the container. The cell further includes a pressure relief vent mechanism having an offset C-shaped reduced thickness groove formed in the end wall of the container. A cover can be welded to the closed end wall of the container over the pressure relief vent mechanism.

Abstract: An electrochemical cell is provided with an enhanced pressure relief vent formed in a closed end of the cell container that allows for effective venting of gas from the closed end of the container. The cell includes 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 electrode, and an aqueous alkaline electrolyte, all disposed in the container. The cell further includes a pressure relief vent mechanism having an offset C-shaped reduced thickness groove formed in the end wall of the container. A cover can be welded to the closed end wall of the container over the pressure relief vent mechanism.

Abstract: 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°.

Abstract: An electrochemical cell with a pressure relief vent formed in a metal plate disposed in at least one of the closed end and the open end of the container. The pressure relief vent has an annular ring that includes a reduced thickness groove, interrupted in at least two places by unthinned sections of the plate. When the vent opens to relieve pressure from within the cell, the area of the plate within the annular ring remains attached to the remainder of the plate by at least one of the unthinned sections. A can with such a pressure relief vent formed in the can bottom is useful as an electrochemical cell container.

Abstract: An electrochemical cell with a pressure relief vent formed in a metal plate disposed in at least one of the closed end and the open end of the container. The pressure relief vent has an annular ring that includes a reduced thickness groove, interrupted in at least two places by unthinned sections of the plate. When the vent opens to relieve pressure from within the cell, the area of the plate within the annular ring remains attached to the remainder of the plate by at least one of the unthinned sections. A can with such a pressure relief vent formed in the can bottom is useful as an electrochemical cell container.