Toyota Jidosha Kabushiki Kaisha

Other

Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Kojiro Ito

Nobuyasu Morishita

Shinichi Yuasa

Shinichiro Ito

Hajime Seri

Kiyoshi Hayashi

Masato Onishi

Toshihiro Yamada

Munehisa Ikoma

Toshiyuki Yamashita

Michio Ozawa

Yasufumi Tanaka

There is provided manufacturing method of battery comprising adhering process (S) to adhere fluorescent material (leakage indicator including fluorescein) which emits fluorescence in response to predetermined light (ultraviolet radiation) irradiated under condition that electrolyte exists, to at least one portion of a surface on a battery case, and leakage detecting process (Sthrough S) to detect presence/absence of electrolyte leakage with fluorescence which an adhered portion emits in response to the predetermined light (ultraviolet radiation) irradiated on at least the adhered portion which has adhesion of the fluorescent material (leakage indicator including fluorescein), out of the surface on the battery case.

Battery, manufacturing method of battery, and check method of electrolyte leakage

A method of manufacturing a hydrogen-absorption alloy electrode which comprises particles of a hydrogen-absorption alloy that comprises a rare earth element, Ni, Co and Al. The method comprises subjecting the hydrogen-absorption alloy particles to an alkaline treatment in a 10 to 50 weight % NaOH solution at 60 to 140&#xb0; C. for 0.5 to 5 hours such that on the surface of the particles (amount of Al on surface/amount of Al in alloy)&#x3c;(amount of Co on surface/amount of Co in alloy).

Hydrogen-absorption alloy electrode

A manufacturing method of a secondary battery according to the present invention includes a charging/discharging process wherein the secondary battery is arranged to a restraining jig, that restricts an expansion caused on the battery case with respect to at least a part of the battery case and that is configured to be removable from a charging/discharging device with the secondary battery arranged thereto regardless of the magnitude of the internal pressure in the secondary battery; a charging/discharging is performed to the secondary battery with the restraining jig mounted to the charging/discharging device; and after the completion of the charging/discharging, the restraining jig is removed from the charging/discharging device with the secondary battery arranged to the restraining jig.

Manufacturing method of secondary battery, restraining jig for secondary battery, charging/discharging device for secondary battery, and charging device for secondary battery

To provide an alkaline storage battery, a cobalt compound obtained by mixing a cobalt hydroxide powder and a sodium hydroxide powder and applying a heat treatment to the same in an atmosphere containing oxygen, a cobalt compound obtained by adding a sodium hydroxide aqueous solution and an aqueous solution containing an oxidizing agent to a cobalt hydroxide powder, or a cobalt compound obtained by baking a cobalt hydroxide powder in an atmosphere containing oxygen is used. This provides cobalt compounds suitable for producing long-life and highly reliable alkaline storage batteries, methods for manufacturing the same, and positive electrode plates of alkaline storage batteries employing the same.

Cobalt compound for use in alkaline storage battery, method for manufacturing the same, and positive electrode plate of alkaline storage battery employing the same

A negative electrode of a battery, chiefly includes hydrogen absorption alloy particles each having a surface layer. The alloy particles satisfy R/R&#x2267;0.004 and 5 &#x3bc;m&#x2266;R&#x2266;20 &#x3bc;m, or preferably 5 &#x3bc;m&#x2266;R&#x2266;12.5 &#x3bc;m, where Ris a half of a median diameter of the particles and Ris thickness of the surface layers.

Hydrogen absorption alloy electrode

A negative electrode of a battery, chiefly includes hydrogen absorption alloy particles each having a surface layer. The alloy particles satisfy R /R &gE;0.004 and 5 &mgr;m&lE;R &lE;20 &mgr;m, or preferably 5 &mgr;m&lE;R &lE;12.5 &mgr;m, where R is a half of a median diameter of the particles and R is thickness of the surface layers.

A positive electrode for an alkaline storage battery having a high capacity and facilitating the manufacturing thereof and an alkaline storage battery using the same are provided. The positive electrode utilized includes active material powder containing nickel hydroxide and powder made of cobalt compounds, where a ratio of a cobalt compound with a valence of cobalt being 2.6 or more to the whole of cobalt compounds is 30 weight % or more.

Growing community of inventors

Kosai, Japan

Kojiro Ito