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. 14, 2023
Filed:
Feb. 25, 2020
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Daikin Industries, Ltd., Osaka, JP;
Akira Koyama, Toyota, JP;
Hiroto Asano, Nisshin, JP;
Shimpei Kondo, Nagoya, JP;
Shigeaki Yamazaki, Osaka, JP;
Tomoya Hidaka, Osaka, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
DAIKIN INDUSTRIES, LTD., Osaka, JP;
Abstract
The disclosure provides an electrolyte solution that enables a lithium ion secondary battery to have reduced initial resistance, a small increase in resistance at high-temperature cycles, and reduced gas generation at high temperature. The electrolyte solution for a lithium ion secondary battery contains lithium difluorophosphate, an oxalic acid ion, and a compound (1) represented by the following formula (1): wherein Rand Rare each independently a methyl group, an ethyl group, a propyl group, or a butyl group.