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. 23, 2002
Filed:
Jan. 27, 2000
Tsong P. Perng, Hsinchu, TW;
Bao-Min Ma, Apex, NC (US);
James Landi, Tempe, AZ (US);
Qun Chen, Peoria, AZ (US);
Santoku Corporation, Kobe, JP;
Abstract
Manganese-free rare earth-transition metal AB -type hydrogen-absorbing alloys having favorable high rate discharge characteristics, suitable for use in rechargeable batteries for electrical vehicles or hybrid electrical vehicles, include compositions of the general formula: R(Co Al M Ni ) , where R is at least one element selected from rare earth elements and yttrium (Y), M is at least one refractory metal selected from Groups IVB, VB, and VIB of the periodic table, the value of u is from 0 to about 0.25, v is from 0 to about 0.10, w is from 0 to about 0.05, and z, the ratio of R(Co Al M Ni )/R, is from about 4.70 to about 5.50. The unit cell volume is from about 87 to about 88.5 A at 25° C., the plateau pressure is from about 3 to about 10 apsi at 25° C., and the composition is essentially free of manganese.