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Gastight rectangular cell

A rectangular battery, rectangular technology, applied in the field of laser-sealed and welded sealed rectangular battery and alkaline storage battery

Inactive Publication Date: 2004-02-11
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the reduction in the thickness of such rectangular cells is limited

Method used

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  • Gastight rectangular cell
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Examples

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Embodiment Construction

[0024] The present invention will be further described in the following examples, but the present invention should not be construed as being limited by these descriptions, and various appropriate modifications and changes can be made without changing the essence of the invention.

[0025] (Example 1)

[0026] The sealed rectangular battery of the first embodiment is in figure 1 -3, a positive electrode terminal 2 is arranged on the wide side of the metal container 20 . (Preparation of positive electrode metal plate)

[0027] 90 parts by weight of nickel hydroxide powder containing 2.5% by weight of zinc and 1% by weight of cobalt as precipitation components, 10 parts by weight of cobalt hydroxide, 3 parts by weight of Zinc oxide powder and 50 parts by weight of an aqueous solution of 0.2 wt-% hydroxyphenylcellulose were mixed to prepare an active positive electrode material paste. Then, the prepared active material paste was extruded into a widened, dried, rolled nickel sh...

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Abstract

An object of the invention is to provide a hermetically sealed rectangular battery which is not liable to melting of gasket during laser welding causing the deterioration of the battery airtightness as well as to occurrence of electrolyte leakage and accomplish further reduction of the thickness of the hermetically sealed rectangular battery. A hermetically sealed rectangular battery comprising a group of electrode plates received in a metallic can having a pair of opposing wide sides and a pair of opposing narrow sides, the group of electrode plates having a positive electrode plate and a negative electrode plate laminated on each other with a separator provided interposed therebetween, characterized in that the metallic can is provided with a terminal which also acts as an electrode of one of the two polarities on the wide side thereof.

Description

technical field [0001] The present invention relates to sealed rectangular batteries, such as alkaline accumulators, having a metal container. More particularly, the present invention relates to laser-seal welded sealed rectangular cells. Background technique [0002] In recent years, there has been a remarkable development of portable devices using batteries. Video cameras, portable phones, and the like already have a large market. Power sources to be used to operate these devices are facing demands for higher capacity, smaller size and lighter weight. In order to meet these demands, small-sized sealed rectangular batteries with rectangular containers instead of cylindrical containers have been increasingly used in order to reduce the battery size and thus save battery space. [0003] like Figure 4 As shown, such a sealed rectangular battery is usually prepared according to a method that includes receiving in a metal container a set of electrode metal plates, the electr...

Claims

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Application Information

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IPC IPC(8): H01M10/28H01M10/34H01M50/176H01M50/553
CPCY02E60/124H01M2/30H01M10/345H01M2/06Y02E60/10Y02P70/50H01M50/553H01M50/176
Inventor 樋之津直义浜松太计男越智宏树
Owner SANYO ELECTRIC CO LTD
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