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:
Jun. 20, 2000
Filed:
Sep. 23, 1998
Taketoshi Minohara, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A method of recycling a deteriorated nickel-hydrogen battery. Concentrated sulfuric acid containing at least one of Ni ions, Co ions and La ions is poured into the deteriorated nickel-hydrogen battery and the interior thereof is cleaned with the concentrated sulfuric acid. The state of the interior of the battery is maintained at a temperature of 60.+-.10.degree. C., and an electric current is supplied in such a direction as to charge the nickel-hydrogen battery. Then, the interior of the nickel-hydrogen battery is cleaned and filled with an alkali electrolyte containing a reducing agent. Consequently, .gamma.-NiOOH changes to .beta.-NiOOH to restore the capacity of a positive electrode, and Mm(OH).sub.3, Al(OH).sub.3, Mn(OH).sub.2 and CO(OH).sub.2 dissolve in concentrated sulfuric acid to activate the surface of a negative electrode. In addition, the hydrophilic property of the separator is restored.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile