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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 12191449 B1

PDFFull Text
Date of Patent:
Jan. 07, 2025

Filed:

Oct. 20, 2021

Secondary battery and device comprising the same

Applicant:

Contemporary Amperex Technology (Hong Kong) Limited, Hong Kong, CN;

Inventors:

Zeli Wu, Ningde, CN;

Changlong Han, Ningde, CN;

Chenghua Fu, Ningde, CN;

Assignee:

CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong, CN;

Attorney:

Ladas & Parry LLP

Primary Examiner:

Laura Weiner

Int. Cl.
CPC ...
H01M 10/0567 (2010.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/48 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/58 (2010.01); H01M 4/587 (2010.01); H01M 10/0525 (2010.01); H01M 10/0569 (2010.01); C07D 307/60 (2006.01); C07D 309/32 (2006.01); C07D 313/04 (2006.01); C07F 9/09 (2006.01);
U.S. Cl.
CPC ...
H01M 10/0567 (2013.01); H01M 4/364 (2013.01); H01M 4/386 (2013.01); H01M 4/48 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/5825 (2013.01); H01M 4/587 (2013.01); H01M 10/0525 (2013.01); H01M 10/0569 (2013.01); C07D 307/60 (2013.01); C07D 309/32 (2013.01); C07D 313/04 (2013.01); C07F 9/095 (2013.01); H01M 2300/0037 (2013.01); H01M 2300/004 (2013.01);
Abstract

This application provides a secondary battery and a device comprising the same. The secondary battery includes a negative electrode plate and an electrolyte. The negative electrode plate includes a negative electrode active material. The electrolyte includes an electrolyte salt, an organic solvent, and an additive. The negative electrode active material includes a silicon-based material. The organic solvent includes ethylene carbonate (EC) and diethyl carbonate (DEC). A mass ratio of EC in the organic solvent is less than or equal to 20%, and a mass ratio of DEC in the organic solvent is less than or equal to 20%. The additive includes an additive A and an additive B. The additive A is selected from one or more of compounds represented by Formula 1 or Formula 2, and the additive B is selected from one or more of compounds represented by Formula 3, as described in the application.

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