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US 7,459,232 B2Granted
Secondary battery having safety valve and method of manufacturing same
AssigneeSamsung SDI Co., Ltd.
InventorJin-Uk Lee
Life of this patent
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Abstract
An electrode assembly includes a positive plate, a negative plate and a separating plate interposed between those two plates, a container receiving the electrode assembly inside thereof, a cap plate fixed onto an opening of the container to seal the container, and a safety valve formed on the region where the container and the cap plate are joined.
Claims1
A secondary battery, comprising:
- an electrode assembly including a positive plate, a negative plate and a separating plate interposed between the positive plate and the negative plate;
- a cylindrical container having an opening for receiving the electrode assembly inside the container;
- a cap plate crimped to the opening of the container to seal the container;
- and
- a safety valve formed on the region where the container and the cap plate are crimped,
- wherein the safety valve is formed on a sealing part where a top peripheral edge of the container defining the opening is curled on and contacts the entire circumference of the cap plate, the sealing part including a first sealing part formed with a predetermined crimping strength and a second sealing part formed with a weaker crimping strength than the first sealing part, the second sealing part forming the safety valve.
3 more elements
Dependencies are inferred from the claim text.