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:
Sep. 29, 2026
Filed:
Nov. 30, 2021
Panasonic Energy Co., Ltd., Moriguchi, JP;
Hideki Morishima, Tokushima, JP;
PANASONIC ENERGY CO., LTD., Osaka, JP;
Abstract
This non-aqueous electrolyte secondary battery is characterized by comprising: a wound electrode body in which a positive electrode and a negative electrode are wound via a separator. Said battery is also characterized in that: when the separator is divided into five parts in the width direction and the five divided regions are defined as a region A positioned on one end of the separator in the width direction, a region B positioned on the other end of the separator in the width direction, a region C positioned in the center of the separator in the width direction, a region D positioned between the region A and the region C, and a region E positioned between the region B and the region C, then the void ratio of the region D and the region E is greater than the void ratio of the region A, the region B, and the region C.