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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 11205799 B1

PDFFull Text
Date of Patent:
Dec. 21, 2021

Filed:

Dec. 18, 2018

Nonaqueous electrolyte secondary battery

Applicant:

Sumitomo Chemical Company, Limited, Tokyo, JP;

Inventors:

Kosuke Kurakane, Osaka, JP;

Toshihiko Ogata, Osaka, JP;

Chikae Yoshimaru, Osaka, JP;

Chikara Murakami, Osaka, JP;

Assignee:

SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;

Attorney:

Panitch Schwarze Belisario & Nadel LLP

Primary Examiner:

Eugenia Wang

Int. Cl.
CPC ...
H01M 10/0525 (2010.01); H01M 10/0585 (2010.01); H01M 4/131 (2010.01); H01M 4/133 (2010.01); H01M 4/48 (2010.01); H01M 2/16 (2006.01); H01M 4/587 (2010.01); H01M 50/46 (2021.01); H01M 50/449 (2021.01); H01M 50/426 (2021.01); H01M 50/417 (2021.01); H01M 4/485 (2010.01); H01M 4/62 (2006.01); H01M 4/583 (2010.01); H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01);
U.S. Cl.
CPC ...
H01M 10/0525 (2013.01); H01M 4/131 (2013.01); H01M 4/133 (2013.01); H01M 4/48 (2013.01); H01M 4/485 (2013.01); H01M 4/587 (2013.01); H01M 4/622 (2013.01); H01M 4/623 (2013.01); H01M 10/0585 (2013.01); H01M 50/417 (2021.01); H01M 50/426 (2021.01); H01M 50/449 (2021.01); H01M 50/46 (2021.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01);
Abstract

The present invention provides a nonaqueous electrolyte secondary battery in which a decrease in discharge capacity after a charge-discharge cycle is reduced. The nonaqueous electrolyte secondary battery in accordance with an aspect of the present invention includes (i) a positive electrode plate and a negative electrode plate whose results of a scratch test carried out in the TD and the MD fall within predetermined ranges, (ii) a nonaqueous electrolyte secondary battery separator that includes a porous film whose temperature rise ending period with respect to a resin amount per unit area at irradiation with microwave falls within a predetermined range, and (iii) a porous layer that contains an α-form polyvinylidene fluoride-based resin of a polyvinylidene fluoride-based resin at a predetermined proportion. The porous layer is arranged between the nonaqueous electrolyte secondary battery separator and at least one of the positive electrode plate and the negative electrode plate.

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