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:
Jul. 15, 2025
Filed:
Nov. 28, 2022
Murata Manufacturing Co., Ltd., Kyoto, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A secondary battery includes an outer package member, a battery device, and a non-aqueous solution. The outer package member includes iron. The battery device and the non-aqueous solution are contained inside the outer package member. The battery device includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode and the negative electrode are opposed to each other and are wound. The positive electrode and the negative electrode are each impregnated with the electrolytic solution. The negative electrode is electrically coupled to the outer package member, and includes at least one selected from the group consisting of polyvinylidene difluoride, a polyacrylic acid, a polyacrylic acid salt, polyacrylonitrile, and derivatives thereof. The non-aqueous solution is disposed in at least a portion of a space around the battery device inside the outer package member. The electrolytic solution and the non-aqueous solution each include a dinitrile compound. A content of the dinitrile compound in the electrolytic solution is less than 0.01 wt %. A content of the dinitrile compound in the non-aqueous solution is greater than or equal to 0.01 wt % and less than or equal to 0.1 wt %.