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:
Apr. 05, 2016
Filed:
Jul. 18, 2013
Fdk Corporation, Minato-ku, Tokyo, JP;
Takuya Kai, Takasaki, JP;
Jun Ishida, Takasaki, JP;
FDK CORPORATION, Minato-ku, Tokyo, JP;
Abstract
A nickel-metal hydride secondary cell holds therein an electrode group and an alkaline electrolyte solution containing NaOH as a main constituent of its solute. The electrode group has positive and negative electrodes lapped one over the other with a separator therebetween. The negative electrode contains a hydrogen absorbing alloy having a composition represented by the general formula: (RET)MgNiAl(where RE is at least one element selected from among Y, Sc and rare-earth elements, T is at least one element selected from among Zr, V and Ca, and subscripts x, y, z and a are values respectively satisfying 0≦x, 0.05≦y≦0.35, 2.8≦z≦3.9, and 0.10≦a≦0.25), the hydrogen absorbing alloy has a crystal structure in which an ABsubunit and an ABsubunit are superimposed one upon the other, and Cr is substituted for part of the Ni.