JPH076743A - Film battery and manufacture thereof - Google Patents

Abstract

PURPOSE:To provide a film battery using rolled materials, which is capable of simplifying mamagemrnt after production and transportation and selecting the optional capacity by users. CONSTITUTION:A positive activation material 1, an electrolyte layer 2, and a negative activation material 3 are laminated to form a power generating element. Metal foils which are current collectors also serving as containers 4, 5 are arranged on both sides of the power generating element, and the circumferences of the current collectors also serving as containers 4, 5 are bonded via a frame-like adhesive resin to form a thin battery. The circumferential shapes of the thin batteries are repeated straights and circular arcs to form a film battery.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film battery used in the field of small electronic devices such as smart cards.

[0002]

2. Description of the Related Art Recently, as microelectronics has been used, as represented by a memory-backup power supply for various electronic devices, the battery is housed in the electronic device and integrated with electronic elements and circuits. Miniaturization, weight reduction,
There is a demand for thinning and high energy density. In the field of primary batteries, small and lightweight batteries such as lithium batteries have already been put into practical use, but their fields of use are limited.
Therefore, many research institutes are still studying film batteries that are smaller, lighter, and thinner than conventional batteries.

Conventionally, a thin battery of this type has a structure as shown in FIGS. 1 and 2, and includes a positive electrode active material layer 1, an electrolyte layer 2 and a negative electrode active material layer 3 stacked on top of and below a power generating element. A positive electrode collector / cumulative tank 4 and a negative electrode collector / cumulative tank 5 are arranged in the above, and the adhesive resin 6 and the collector / cumulative tanks 4 and 5 are integrated, as shown in FIG. It is considered that the battery is cut into individual rolls after being formed into a roll at the time of mass production. In this case, if the individual batteries are very small, it takes time and labor to manage and transport, and there is a problem that the individual batteries must be reconnected to obtain an arbitrary capacity.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to use a winding material to simplify management and transportation after battery production and to provide an arbitrary capacity. It is to provide a film battery that customers can select.

[0005]

The present invention provides a positive electrode active material,
A metal foil, which is a collector and a container, is arranged above and below a power generation element in which an electrolyte layer and a negative electrode active material are layered, and the peripheral portion of the collector and the container is surrounded by a frame-shaped adhesive resin. A thin battery that is adhered, characterized in that after manufacturing the thin battery in a roll shape, it is not separated into individual batteries by punching holes in the shape of perforations between individual battery shapes. It is a solution.

The perforated hole diameter is 0.5 mm to
The above problem is solved by making it 1.5 mm.

Examples of the above-mentioned electrolyte of the present invention include those having a polyfunctional hydroxyl group and an ether which is crosslinked by an ether bond with a diacrylate. Next, as the ionic compound contained in the electrolyte, for example, LiClO4, LiSCN, LiAsF6, LiCF3SO3, L
Examples thereof include Li salts such as iCF3SO2, but are not particularly limited. Next, as the non-aqueous electrolytic solution contained in the electrolyte, cyclic esters such as propylene carbonate and ethylene carbonate, tetrahydrafuran or a derivative thereof, 1,3-dioxolane, 1,2-dimethoxyethane Examples thereof include ethers and the like, or a mixture of two or more thereof, but are not limited thereto. Next, examples of the active material forming the positive electrode include metal oxides such as manganese, vanadium, and cobalt, but are not particularly limited. Next, examples of the active material that constitutes the negative electrode include carbonaceous materials such as carbon, lithium metal, lithium-aluminum, lithium-lead, lithium-tin, lithium-gallium, and lithium alloys such as wood alloys. However, it is not limited thereto. Next, materials such as aluminum, stainless steel, and titanium are preferable for the positive electrode current collector, and materials such as stainless steel, iron, nickel, and copper are preferable for the negative electrode current collector, but the material is not particularly limited to these. .

[0008]

According to the present invention, the handling and the transportation can be simplified without separating the wound battery. Further, the customer can easily tear off and select an arbitrary capacity like a stamp.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 4 and 5 are cross-sectional views of a film battery according to an embodiment of the present invention, in which 1 is a positive electrode active material containing manganese dioxide as a main component, and 2 is a polymer solid electrolyte obtained by adding lithium perchlorate to polyethylene oxide. 3 is a negative electrode active material made of lithium. The current collectors 4 and 5 made of stainless steel are arranged above and below these power generating elements, and the peripheral portions of the stainless steel current collectors 4 and 5 are adhered to each other via a polypropylene-based thermoadhesive resin 6. As shown in FIG. 5, after manufacturing the above thin battery into a roll shape, holes having a diameter of 1 mm are continuously punched like a perforation between individual battery shapes so as not to separate the individual batteries. ,
When using, cut it into an arbitrary shape as shown in FIG.

[0010]

The present invention has the following effects. Since it is not separated into individual batteries after manufacturing, management and transportation can be simplified, and the customer can easily tear off and select an arbitrary capacity like a stamp.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a structure of an individual battery having a conventional configuration.

FIG. 2 is a plan view showing a structure of an individual battery having a conventional configuration.

FIG. 3 is a plan view showing a processed state of a battery having a conventional configuration.

FIG. 4 is a sectional view showing a structure of an individual battery according to an embodiment of the present invention.

FIG. 5 is a plan view showing the structure of an individual battery according to an embodiment of the present invention.

FIG. 6 is a plan view showing a processed state of a battery according to an embodiment of the present invention.

[Explanation of symbols]

 1 Positive Electrode Active Material 2 Electrolyte 3 Negative Electrode Active Material 4 Positive Electrode Current Collector 5 Negative Current Collector 6 Sealing Resin

Claims (3)

[Claims] 1. A metal foil, which is a collector and a battery case, is disposed above and below a power generation element in which a positive electrode active material, an electrolyte layer and a negative electrode active material are layered, and a peripheral portion of the current collector and battery container is disposed. A thin film battery formed by adhering via a frame-shaped adhesive resin, wherein the thin battery has a peripheral shape in which straight lines and circular arcs are repeated. 2. A metal foil, which is a collector and a battery case, is arranged above and below a power generating element in which a positive electrode active material, an electrolyte layer and a negative electrode active material are layered, and a peripheral portion of the current collector and battery container is arranged. A method for manufacturing a film battery, comprising manufacturing a thin battery formed by adhering via a frame-shaped adhesive resin into a roll shape, and then punching holes in perforations between individual battery shapes. 3. The diameter of the perforated hole is 0.5 mm to
The film battery manufacturing method according to claim 2, wherein the film battery has a thickness of 1.5 mm.