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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 12580229 B1

PDFFull Text
Date of Patent:
Mar. 17, 2026

Filed:

Aug. 20, 2021

Unit cell including thermochromic polymer and defect detection method using the same

Applicant:

Lg Energy Solution, Ltd., Seoul, KR;

Inventors:

Soo Jung Kim, Daejeon, KR;

Duk Hyun Ryu, Daejeon, KR;

Min Gi Jeong, Daejeon, KR;

Han Saem Park, Daejeon, KR;

Assignee:

LG ENERGY SOLUTION, LTD., Seoul, KR;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Anca Eoff

Int. Cl.
CPC ...
H01M 10/42 (2006.01); G01K 11/12 (2021.01); H01M 10/48 (2006.01); H01M 50/423 (2021.01); H01M 50/449 (2021.01); H01M 50/489 (2021.01);
U.S. Cl.
CPC ...
H01M 10/4235 (2013.01); H01M 10/488 (2013.01); H01M 50/423 (2021.01); H01M 50/449 (2021.01); H01M 50/489 (2021.01); G01K 11/12 (2013.01); H01M 2200/10 (2013.01);
Abstract

A unit cell including a thermochromic polymer and a defect detection method using the same are disclosed. Preferably, the unit cell includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode, wherein the separator includes a thermochromic polymer configured such that the color of the thermochromic polymer changes depending on temperature, whereby the unit cell is easily checked to indicate a short circuit, as well as damage to or defects of the separator.

Find Patent Forward Citations

Kim, Soo. (2026). Unit cell including thermochromic polymer and defect detection method using the same (U.S. Patent No. 12580229). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12580229

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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