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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11660704 B1

PDFFull Text
Date of Patent:
May. 30, 2023

Filed:

Oct. 05, 2018

Secondary battery

Applicant:

Samsung Sdi Co., Ltd., Yongin-si, KR;

Inventors:

Sung Gwi Ko, Yongin-si, KR;

Dae Kyu Kim, Yongin-si, KR;

Jin Young Moon, Yongin-si, KR;

Assignee:

Samsung SDI Co., Ltd., Yongin-si, KR;

Attorney:

Lewis Roca Rothgerber Christie LLP

Primary Examiner:

Victoria H Lynch

Int. Cl.
CPC ...
H01M 10/0525 (2010.01); B23K 26/323 (2014.01); B23K 26/21 (2014.01); B23K 26/08 (2014.01); H01M 50/171 (2021.01); H01M 50/30 (2021.01); H01M 50/169 (2021.01); H01M 50/167 (2021.01); H01M 50/574 (2021.01); B23K 103/18 (2006.01); B23K 101/36 (2006.01); H01M 50/593 (2021.01);
U.S. Cl.
CPC ...
B23K 26/323 (2015.10); B23K 26/08 (2013.01); B23K 26/21 (2015.10); H01M 10/0525 (2013.01); H01M 50/167 (2021.01); H01M 50/169 (2021.01); H01M 50/171 (2021.01); H01M 50/30 (2021.01); H01M 50/574 (2021.01); B23K 2101/36 (2018.08); B23K 2103/18 (2018.08); H01M 50/593 (2021.01);
Abstract

The present invention relates to a secondary battery capable of improving the coupling force between a safety vent and a cap-up. For example, disclosed is a secondary battery comprising: an electrode assembly; a case for accommodating the electrode assembly; a cap assembly coupled to the upper part of the case; and a gasket interposed between the cap assembly and the case, wherein the cap assembly includes a cap-up and a safety vent, which is provided at the lower part of the cap-up and has a vent extension part extending to the upper part of the cap-up so as to encompass the edge of the cap-up, a welding region, in which the safety vent and the cap-up are welded and coupled by laser welding, is formed in the vent extension part, and the welding region is formed in a line shape.

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