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US 7,887,950 B2Granted
Lithium secondary battery
AssigneeSamsung SDI Co., Ltd.
InventorsHyoungsu Kim, Soonki Woo, Yongtae Kim, Jongku Kim, Sangbong Nam
Life of this patent
Estimating the term…
Abstract
A lithium secondary battery has protrusions or depressions formed on a surface of a gasket, which makes contact with a safety vent, so that gas, which is generated inside the battery, and an electrolyte, do not leak, thereby improving the safety.
Claims17
A lithium secondary battery, comprising:
- an electrode assembly;
- a can to contain the electrode assembly, having an opening;
- a safety vent disposed in the opening of the can, over the electrode assembly, having an inner surface that faces the electrode assembly;
- a gasket positioned between the safety vent and the can, so as to maintain a seal, the gasket having a protrusion and/or depression formed on a first surface of the gasket, the first surface being in direct contact with, and completely covered by, the inner surface safety vent, such that the protrusion and/or depression extends directly toward or away from the inner surface of the safety vent, respectively.
1 more element
A lithium secondary battery comprising:
- an electrode assembly;
- a can to contain the electrode assembly, and comprising a bead;
- a safety vent disposed over the electrode assembly, having an inner surface that faces the electrode assembly;
- a gasket positioned between the safety vent and the can, so as to maintain a seal, the gasket having a protrusion and/or depression formed on a first surface of the gasket that directly contacts, and is completely covered by, the bead, such that the protrusion and/or depression extends directly toward or away from the bead, respectively.
1 more element
A battery, comprising:
- a container including an open first end and a closed second end;
- a cap assembly disposed in the first end of the container, having an inner surface that faces the second end of the can;
- and
- a gasket positioned between the cap assembly and the container, to seal the container, the gasket having:
- at least one protrusion and/or depression formed on a first surface of the gasket that directly contacts the inner surface of the cap assembly;
- and
- at least one protrusion and/or depression formed on a second surface of the gasket that directly contacts the bead.
4 more elements
Dependencies are inferred from the claim text.