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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 12388154 B1

PDFFull Text
Date of Patent:
Aug. 12, 2025

Filed:

Oct. 29, 2021

Separators improved thermal resistance and secondary battery comprising same

Applicant:

SK Innovation Co., Ltd., Seoul, KR;

Inventors:

Yun Kyung Jo, Daejeon, KR;

Jae Woong Kim, Daejeon, KR;

Jeong Han Kim, Daejeon, KR;

Whee Sung Kim, Daejeon, KR;

Assignee:

SK ON CO., LTD., Seoul, KR;

Attorney:

IP & T GROUP LLP

Primary Examiner:

Robert S Carrico

Int. Cl.
CPC ...
H01M 50/446 (2021.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 50/414 (2021.01); H01M 50/417 (2021.01); H01M 50/429 (2021.01); H01M 50/451 (2021.01); H01M 50/457 (2021.01); H01M 50/489 (2021.01);
U.S. Cl.
CPC ...
H01M 50/446 (2021.01); H01M 4/623 (2013.01); H01M 10/0525 (2013.01); H01M 50/414 (2021.01); H01M 50/417 (2021.01); H01M 50/4295 (2021.01); H01M 50/451 (2021.01); H01M 50/457 (2021.01); H01M 50/489 (2021.01);
Abstract

The present invention relates to a separator including a coating layer and a substrate, wherein phase-change peak temperatures measured by differential scanning calorimetry (DSC) at the time of a first temperature increase and at the time of a second temperature increase satisfy specific ranges, a method of producing the same, and an electrochemical device including the same. More particularly, the present invention relates to a separator that has improved thermal resistance and thus may improve battery safety and implement stable movement of lithium ions and a lithium secondary battery including the same.

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Jo, Yun. (2025). Separators improved thermal resistance and secondary battery comprising same (U.S. Patent No. 12388154). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12388154

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