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. 03, 2025
Filed:
Nov. 20, 2019
Toray Industries, Inc., Tokyo, JP;
Hiroaki Kawamura, Otsu, JP;
TORAY INDUSTRIES, INC., Tokyo, JP;
Abstract
An object is a lithium ion battery having high safety and a high energy density and allows estimation of the remaining capacity of the battery from the discharge voltage, provide a positive electrode for lithium ion secondary batteries that includes a lithium iron phosphate particle, a lithium iron manganese phosphate particle, and a layered oxide-based active material particle at a weight ratio of x:y:z, wherein 0.10≤x≤0.60, 0.10≤y≤0.70, 0.10≤z≤0.40, and x+y+z=1, and provide a lithium ion secondary battery characterized in that a discharge curve indicating a relationship between a discharge voltage and a discharge capacity of the lithium ion secondary battery has one non-plateau region between two plateau regions, and a width of the non-plateau region is 20% or more in terms of a state of charge (SOC).