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:
Jul. 03, 2001
Filed:
Jun. 11, 1999
Tadashi Ise, Itano-gun, JP;
Hiroshi Fukuda, Itano-gun, JP;
Teruhiko Imoto, Katano, JP;
Kikuko Kato, Katano, JP;
Yasushi Kuroda, Tokushima, JP;
Nobuyuki Higashiyama, Mino, JP;
Yoshinori Matsuura, Hirakata, JP;
Mamoru Kimoto, Hirakata, JP;
Mitsuzou Nogami, Itano-gun, JP;
Shin Fujitani, Hirakata, JP;
Ikuo Yonezu, Hirakata, JP;
Koji Nishio, Hirakata, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
An object of the present invention is to provide an effective hydrogen-absorbing alloy activation process which can enhance the electrochemical activity of a hydrogen-absorbing alloy and to provide a hydrogen-absorbing alloy electrode which, when used in a battery, ensures an excellent initial inner pressure characteristic, low-temperature discharge characteristic, high-rate discharge characteristic and cycle characteristic. In accordance with the present invention, a hydrogen-absorbing alloy electrode production process is provided which comprises an alloy activation treatment step of immersing a hydrogen-absorbing alloy in a strong acid treatment solution containing metal ions and, in the course of the pH rise of the acid treatment solution, adding an alkali to the acid treatment solution to promote the pH rise of the acid treatment solution.