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:
Nov. 24, 2020
Filed:
Jan. 25, 2018
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Kazufumi Miyatake, Osaka, JP;
Toshifumi Nagino, Osaka, JP;
Abstract
A lithium-ion secondary battery that includes an electricity-generating unit that includes: a positive electrode having a positive electrode collector, and a positive electrode mixture layer formed on a surface of the positive electrode collector; a negative electrode having a negative electrode collector, and a negative electrode mixture layer formed on a surface of the negative electrode collector; and a separator disposed between the positive electrode and the negative electrode. At least one of the positive electrode mixture layer and the negative electrode mixture layer has a high-density portion of high mixture density, and a low-density portion having a lower mixture density than the high-density portion and being in contact with the high-density portion. The low-density portion has a smaller area than the high-density portion when viewed in plan.