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. 12, 2019
Filed:
Dec. 04, 2015
Gs Yuasa International Ltd., Kyoto-shi, Kyoto, JP;
Kenji Izumi, Shizuoka, JP;
Yoshinobu Sato, Shizuoka, JP;
Etsuko Ogasawara, Shizuoka, JP;
Takeshi Chiba, Shizuoka, JP;
Yu Kojima, Shizuoka, JP;
Kazuhiro Sugie, Shizuoka, JP;
GS Yuasa International Ltd., Kyoto, JP;
Abstract
A lead acid battery including: a positive electrode plate including a positive electrode grid and a positive electrode active material; a negative electrode plate including a negative electrode grid and a negative electrode active material; an electrode plate group including the positive electrode plate, the negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate; a battery container including a plurality of cell chambers each accommodating the electrode plate group and an electrolyte; and a lid sealing an opening of the battery container. A ratio P/N of mass P of the positive electrode active material to mass N of the negative electrode active material is 1.25 or more and 1.65 or less. The negative electrode grid contains bismuth in an amount of 1 ppm or more and 300 ppm or less.