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:
Oct. 14, 2025
Filed:
Sep. 09, 2022
Primearth Ev Energy Co., Ltd., Kosai, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Prime Planet Energy & Solutions, Inc., Tokyo, JP;
Yusuke Takashi, Toyohashi, JP;
Takaaki Izumoto, Toyohashi, JP;
TOYOTA BATTERY CO., LTD., Kosai, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
PRIME PLANET ENERGY & SOLUTIONS, INC., Tokyo, JP;
Abstract
A nonaqueous electrolyte rechargeable battery includes an electrode body, a nonaqueous electrolyte, and a rectangular box-shaped battery case accommodating the electrode body and the nonaqueous electrolyte. The electrode body includes a positive electrode including a positive base and a positive composite material layer, a negative electrode including a negative base and a negative composite material layer, and a porous resin separator disposed therebetween. The electrode body has a low profile when the positive electrode, the negative electrode, and the separator are laminated and rolled. When spring constant of the nonaqueous electrolyte rechargeable battery with a load of 316 to 210 N/cmand 95 to 74 N/cmis respectively referred to as spring constant H and spring constant L, the ratio L/H is 0.34 or greater and 0.41 or less. A resistance increase rate between before and after a square wave test is less than or equal to 1.17.