Electrochemical cell having venting current collector and seal assembly
AssigneeEveready Battery Company, Inc.
InventorsRobert E. Ray JR., James Xixian Wu
Life of this patent
Estimating the term…
Abstract
A low profile collector and seal assembly for sealing the open end of a container of an electrochemical cell and providing venting of pressurized gases. An electrochemical cell has a can with a closed bottom end and an open top end, positive and negative electrodes disposed in the can, and a collector and seal assembly disposed in the open top end of the can for closing the open top end of the can. The collector and seal assembly includes a current collector and an annular seal that move relative to each other from a sealed position to a vented position when the internal cell pressure reaches a pressure threshold to vent pressurized gases.
Claims44
An electrochemical cell comprising:
- a container having a bottom end and an open top end;
- a positive electrode disposed in said container;
- a negative electrode disposed in said container;
- a seal member disposed in the open top end of said container for closing the open top end of said container, said seal member having an opening defined by an upstanding wall;
- and
- a current collector having a shaft extending through the opening in said seal member and contacting one of the positive and negative electrodes, wherein the current collector is interference fit within the opening such that the upstanding wall of the seal member sealingly engages the shaft to of the current collector when in a sealed position, and one of the upstanding wall of the seal member and current collector is axially movable relative to the other of the upstanding wall of the seal member and current collector to move to a vent position upon experiencing a predetermined pressure so as to provide a pressure relief passage to vent pressurized gases.
An electrochemical cell comprising:
- a container having a bottom end and an open top end;
- a positive electrode disposed in said container;
- a negative electrode disposed in said container;
- a seal member disposed in the open top end of said container for closing the open top end of said container, said seal member having an opening defined by an upstanding wall in the seal member;
- and
- a current collector having a shaft extending through the opening of the seal member and contacting one of the positive and negative electrodes, wherein the current collector is interference fit within the opening such that the seal member sealingly engages the shaft of the current collector when in a sealed position, wherein the current collector is forced to move within the opening of the seal member from a sealed position to a vent position upon experiencing a predetermined pressure so as to provide a pressure relief passage to vent pressurized gases.
An electrochemical cell comprising:
- a containing having a bottom end and an open top end;
- a positive electrode disposed in said container;
- a negative electrode disposed in said container;
- a seal member disposed in the open top end of said container for closing the open top end of said container, said seal member having a central hub and an opening defined by an upstanding wall formed in the central hub;
- and
- a current collector having a shaft extending through the opening of said seal member and contacting one of the positive and negative electrodes, wherein the current collector is interference fit within the opening such that the seal member sealingly engages the shaft of the current collector when in a sealed position, and the central hub of the seal member is forced to move along the shaft of the current collection from a sealed position to a vent position upon experiencing a predetermined pressure so as to provide a pressure relief passage to vent pressurized gases.
A collector and seal assembly for sealing the open end of an electrochemical cell container, said collector and seal assembly comprising:
- a seal member adapted to be disposed in an open end of a container to provide a sealed closure to the open end of the container, said seal member having an opening defined by an upstanding wall;
- and
- a current collector having a shaft extending through the opening in said seal member, wherein the current collector is interference fit within the opening such that the upstanding wall of the seal member sealingly engages the shaft of the current collector when in a sealed position, and one of the upstanding wall of the seal member and current collector is forced to move axially relative to the other of the upstanding wall of the seal member and current collector to move to a vent position upon experiencing a predetermined pressure so as to provide a pressure relief passage to vent pressurized gases.
Dependencies are inferred from the claim text.