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:
Jun. 22, 2021
Filed:
Jun. 08, 2016
Envision Aesc Japan Ltd., Zama, JP;
Manabu Nishijima, Kanagawa, JP;
Fumihiro Kawamura, Kanagawa, JP;
Yuji Muroya, Kanagawa, JP;
Yoshiaki Nitta, Kanagawa, JP;
Envision AESC Japan Ltd., Zama, JP;
Abstract
A non-aqueous electrolyte secondary battery with improved cycle durability includes a power generating element including a positive electrode obtained by forming a positive electrode active material layer containing a positive electrode active material on a surface of a positive electrode current collector, a negative electrode obtained by forming a negative electrode active material layer containing a negative electrode active material on a surface of a negative electrode current collector, and a separator, a ratio of a rated capacity to a pore volume of the separator being 1.55 Ah/cc or more, a ratio of a battery area to a rated capacity being 4.0 cm/Ah or more, and a rated capacity being 30 Ah or more, wherein a variation in porosity in the separator is 4.0% or less.