Metal working – Method of mechanical manufacture – Electrical device making
Patent
1993-10-01
1995-07-11
Maples, John S.
Metal working
Method of mechanical manufacture
Electrical device making
296231, 429127, H01M 612
Patent
active
054317010
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This application is a 371 of PCT/JP93/00159 filed Feb. 8, 1993.
1. Technical Field
This invention relates to a method of manufacturing of film type batteries for use in the fields of electronic equipment and electric automobiles etc.
2. Background Art
FIG. 30 is an oblique view showing one process of a conventional manufacturing method of a film type battery. In the conventional method; an active material 102 is applied within a region of a frame after installing the frame on a surface of a current collector plate 101, the frame is removed and a sealing agent 103 is put on the area where the frame had been installed, so as to form an active material layer on the current collector plate 101, an electrolyte layer is formed on a separate current collector plate in the same way, and these current collector plates are placed one upon another.
In the above conventional method, however, the work for removing the frame and putting the sealing agent 103 on the area where the frame has been installed is troublesome, so that this method is inefficient for mass-production. Further, the active material layer and the electrolyte layer are formed on different current collector plates respectively, so that applied thicknesses and applied areas of the active material and the electrolyte are apt to be scattered to cause dispersion of battery quality.
An object of this invention is to provide a manufacturing method of a highly-efficient film type battery enabling easy mass-production of the battery without producing any dispersion of battery quality.
SUMMARY OF THE INVENTION
In a manufacturing method of a film type battery equipped with a generating element composed of a positive active material, an electrolyte and a negative active material placed one upon another in a layer structure; this invention is characterized in that the method includes a step of installing a layer comprising a sealing agent on a surface of a first current collector plate, a step of holding the composition materials of the generating element to a through hole of the layer comprising the sealing agent, and a step of installing a second current collector plate after composing the generating element.
The installation and holding step may be carried out as follows: three layers comprising the sealing agent, a holding step for holding one-side active material is carried out after a first installation step, a holding step for holding the electrolyte is carried out after a next installation step, and a holding step for holding the other-side active material is carried out after the last installation step. layers comprising the sealing agent, a holding step for holding one-side active material is carried out after a former installation step, and a holding step for holding the electrolyte and the other-side active material in this order is carried out after a latter installation step. layers comprising the sealing agent. A holding step for holding one-side active material and the electrolyte in this order is carried out after a former installation step, and a holding step for holding the other-side active material is carried out after a latter installation process. layer comprising the sealing agent, a holding step for holding one-side active material, the electrolyte and the other-side active material in this order is carried out after the installation step.
In this invention, the generating element is formed by carrying out the installation step and the holding step continuously, so that it can be formed with good workability. Therefore, according to the present invention, the film type battery can be efficiently mass-produced. Further, since the generating element is formed in the through hole of the layer comprising the sealing agent, its dimensions are determined by dimensions of the through hole. In addition, a thickness of the layer comprising the sealing agent and a size of the through hole can be set to specified values precisely and easily. Consequently, the generating element can be set to a specified size precisely
REFERENCES:
patent: 5314507 (1994-05-01), Rossoll
Kagawa Hiroshi
Kato Shiro
Murata Kazuo
Maples John S.
Yuasa Corporation
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