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Electrode for battery, manfacturing method thereof, and apparatus for it

A manufacturing method and a manufacturing device technology, which are applied to battery electrodes, alkaline storage battery electrodes, electrode manufacturing, etc., and can solve problems such as cracks

Inactive Publication Date: 2004-07-28
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, this conventional method also has a disadvantage that, in the later process, when a cylindrical shape is formed by helically winding alternately stacked positive and negative electrodes (via a separator), will produce cracks

Method used

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  • Electrode for battery, manfacturing method thereof, and apparatus for it
  • Electrode for battery, manfacturing method thereof, and apparatus for it
  • Electrode for battery, manfacturing method thereof, and apparatus for it

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Embodiment Construction

[0044] One mode of embodiment of the present invention will be explained below with reference to FIG. 1 . The electrode manufacturing process according to the present invention is shown and described in the order of procedure (a), procedure (b) and procedure (c) in FIG. 1 . As shown in FIG. 1( a ), an electrode material 1 of metal foam filled with an active material is prepared. The electrode material 1 has a thin rectangular plate. Metal foam forms the core material of the electrodes. Electrode material 1 includes a filled part 2 (filled with active material), an unfilled part 3 (no active material filled, only metal foam) and a boundary line 4 (is the boundary between filled part 2 and unfilled part 3) . The unfilled portion 3 is narrower in width along the longer side. The filling part 2 has an electrode surface on the front and back. There is a lot of space inside the metal foam. Next, as shown in FIG. 1(b), on a straight line 7 parallel to the boundary line, a part ...

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Abstract

An apparatus for manufacturing a battery electrode from foamed metal electrode material includes first and second rollers which are parallel to each other at a shaft center, and rotatable in directions opposite to each other, and a guide bar which is between the first and second rollers. A method for manufacturing a battery electrode includes supplying a foamed metal electrode material including voids, and having a filled portion filled with active material and an unfilled portion without the active material, and a boundary line between the filled and unfilled portions. Part of the unfilled portion is folded in parallel to the boundary line passing through the unfilled portion, and at right angle against the unfilled portion. A lead welding portion is formed along the direction of the longer side, by applying, to the unfilled bent portion, a force in the direction perpendicular to the filled portion in a way to crush the voids, and compress the bent portion. Preferably, the height of the unfilled portion is compressed to a thickness no more than about the thickness of the filled portion. The lead welding portion formed this way has high density and high mechanical strength. And a battery electrode includes a foamed metal including voids and partly filled with an active material and having a plane surface, and a lead welding portion.

Description

technical field [0001] The present invention relates to a method of making an electrode, an electrode for a battery (for example, a nickel-metal hydride battery, a nickel-cadmium battery, etc.), and forming a battery electrode (by spirally winding a porous metal support base structure filled with an active material) fabricated), and an electrode fabricated by this process. Background technique [0002] The electrodes of the secondary battery consist of a metal foam (with a highly porous continuous three-dimensional network structure like the supporting base plate) and an active material filling the metal foam. Electrodes with this configuration exhibit quite good discharge characteristics. Also, nowadays, there is a strong demand for improvement of high-efficiency discharge characteristics. To achieve this goal, the following configuration is proposed: the fabrication method includes two processes: in one process, a part is formed exposing the core material part without fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/24H01M4/26H01M4/80H01M6/10H01M10/04H01M10/28H01M10/30H01M50/536
CPCY02E60/12Y02E60/124H01M2/26H01M4/0409H01M10/30H01M4/0435H01M6/10H01M4/0404H01M4/04H01M4/808Y10T29/49108Y10T29/53135Y10T29/53139Y10T29/10Y02E60/10Y02P70/50B30B3/04H01M50/536
Inventor 臼井广幸安藤常男胜亦郁夫竹岛宏树
Owner PANASONIC CORP