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:
Feb. 13, 2024
Filed:
Oct. 09, 2019
Vehicle Energy Japan Inc., Hitachinaka, JP;
Ryohhei Nakao, Tokyo, JP;
Hiroshi Morikawa, Hitachinaka, JP;
Masashi Naitoh, Hitachinaka, JP;
Masafumi Shiwa, Hitachinaka, JP;
Fanny Matthey, Tokyo, JP;
VEHICLE ENERGY JAPAN INC., Hitachinaka, JP;
Abstract
An appropriate upper limit current value is set in consideration of steep change in battery voltage in a high-current region caused by the ion concentration gradient in a diffusion layer formed around an interface between an electrode and an electrolyte. An upper limit current calculatorincludes: a concentration gradient estimatorthat estimates a lithium ion concentration gradient in a diffusion layer formed around an interface between an electrode and an electrolyte of a battery, based on a current flowing in the battery, or on the current and a temperature; and an upper limit current determinerthat determines an upper limit current value of the battery, based on the lithium ion concentration gradient. The upper limit current determinerdetermines the upper limit current value such that an overvoltage of the battery according to the lithium ion concentration gradient falls within a predetermined range.