Secondary Battery Having a Sealing Gasket with Concave and Convex Portions
AssigneeSamsung SDI Co., Ltd.
InventorsSang-Eun Cheon, Jae-Kyung Kim, Hye-Won Yoon, Seok-Yoon Yoo
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Abstract
A secondary battery includes an electrode assembly having a positive electrode, a negative electrode and a separator interposed between the positive and negative electrodes and a container for receiving the electrode assembly inside thereof. The secondary battery also includes a cap assembly fixed to the container to seal the container and a gasket disposed between the container and the cap assembly. The gasket has at least one concavo-convex portion on a surface contacting the container and/or the cap assembly. This improved gasket structure enhances the air tightness of the secondary battery.
Claims10
A secondary battery, comprising:
- an electrode assembly including a positive electrode, a negative electrode and a separator interposed between the positive electrode and the negative electrode;
- a container for receiving the electrode assembly inside thereof;
- a cap plate fixed to the container to seal the container;
- an external terminal electrically connected to the electrode assembly and protruding through the cap plate;
- and
- a gasket disposed between the cap plate and the external terminal;
- wherein the gasket has at least one concavo-convex portion on a surface contacting the cap plate and/or the external terminal.
A gasket for a secondary battery, the secondary battery including a container and a cap assembly fixed to the container to seal the container, the gasket having a bendable cylindrical end portion for contacting the container and/or the cap assembly;
- wherein a plurality of concavo-convex portions are formed on an inner circumferential surface of the bendable cylindrical end portion and/or an outer circumferential surface along an axial direction of the gasket;
- wherein the plurality of concavo-convex portions are formed continuously along a circumference of the gasket;
- and
- wherein the gasket is disposable between the container and the cap assembly.
Dependencies are inferred from the claim text.