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.:
Date of Patent:
Oct. 22, 2024
Filed:
Mar. 08, 2019
Sanyo Electric Co., Ltd., Daito, JP;
Panasonic Corporation, Kadoma, JP;
Junichi Sugaya, Osaka, JP;
Takuya Shinomiya, Osaka, JP;
Takamitsu Tashita, Tokushima, JP;
Fumikazu Mizukoshi, Tokushima, JP;
Tsukasa Gejo, Osaka, JP;
PANASONIC ENERGY CO., LTD., Osaka, JP;
PANASONIC HOLDINGS CORPORATION, Osaka, JP;
Abstract
A non-aqueous electrolyte secondary cell comprising a negative electrode () having a negative electrode collector () and a negative electrode active material layer () provided on the negative electrode collector (). The negative electrode active material layer () contains graphite particles A and graphite particles B as negative electrode active materials. The graphite particles A have an internal void rate of 5% or less. The graphite particles B have an internal void rate of 8 to 20%. When the negative electrode active material layeris halved in the thickness direction, a regionon the half closer to the outer surface contains more graphite particles A than a regionon the half closer to the negative electrode collector.