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:
Oct. 25, 2005
Filed:
Oct. 03, 2002
Fumio Kato, Moriguchi, JP;
Futoshi Tanigawa, Neyagawa, JP;
Kohji Yuasa, Chigasaki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In a nickel-metal hydride storage battery comprising: an electrode plate assembly including current collectors on the top and bottom portions; an alkaline electrolyte; and a battery case having a substantially rectangular parallelepiped part for accommodating the electrode plate assembly and the alkaline electrolyte, the capacity degradation due to deep discharge and reverse charge inherent to a nickel-metal hydride storage battery is suppressed by setting the amount of the alkaline electrolyte at 70 to 90% of the volume V of the residual space in the battery represented by the equation (1): V=S·h−(V+V+V+V) (1), where S is the cross sectional area of the inner space of the substantially rectangular parallelepiped part, h is the height of the electrode plate assembly, Vis the true volume of the positive electrode plate, Vis the true volume of the negative electrode plate, Vis the true volume of the separator, and Vis the volume of the two current collectors.