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:
Aug. 11, 2015
Filed:
Mar. 18, 2011
Hiromasa Sugii, Tokushima, JP;
Makoto Ochi, Tokushima, JP;
Shuuhei Yoshida, Naruto, JP;
Yoshinobu Katayama, Naruto, JP;
Kazuhiro Kitaoka, Naruto, JP;
Masao Takee, Tokushima, JP;
Hiromasa Sugii, Tokushima, JP;
Makoto Ochi, Tokushima, JP;
Shuuhei Yoshida, Naruto, JP;
Yoshinobu Katayama, Naruto, JP;
Kazuhiro Kitaoka, Naruto, JP;
Masao Takee, Tokushima, JP;
SANYO Electric Co., Ltd., Osaka, JP;
Abstract
To provide a hydrogen storage alloy for an alkaline storage battery that improves output power by pulverization of the alloy in the initial stage of partial charge and discharge cycles and that maintains its surface condition to improve the amount of lifetime work (Wh), and an alkaline storage battery and battery system. A hydrogen storage alloy for an alkaline storage battery includes a composition expressed by LaReMgNiAlT(Re: rare earth element(s) including Y; T: Co, Mn, Zn; 0.17≦x≦0.64, 3.5≦n≦3.8, 0.06≦m≦0.22, v≧0), and a main phase of an ABtype crystal structure. A ratio of X/Y of the concentration ratio X of Al to Ni in a surface layer and the concentration ratio Y of Al to Ni in a bulk layer is 0.36≦X/Y≦0.85. An alkaline storage battery includes the hydrogen storage alloy in its negative electrode. An alkaline storage battery system performs partial charge and discharge control.