JPH06215753A - Battery - Google Patents

Abstract

PURPOSE:To provide a battery structure capable of manufacturing a battery in the same battery production process, and of optionally manufacturing battery structure, according to a shape desired by equipment requiring a battery, in the final process. CONSTITUTION:This battery is provided with plural battery elements 1, composed of positive electrode active material, a separator, and negative electrode active material partitioned by an insulator, between platelike positive and negative electrode collectors opposite to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery structure used in the fields of electronic equipment, toys, accessories and the like.

[0002]

2. Description of the Related Art A conventional battery has a rectangular or circular shape as shown in the plan view of FIG. When driving an electronic circuit unit or the like using the battery, it is impossible to configure the battery according to the shape of the electronic circuit unit. Prepare a space for the battery in a part of the electronic circuit unit. There is. As a result, the dead space occupied by the device is increased, and the size of the entire device is increased. In addition, if it is attempted to manufacture a battery in accordance with the surplus space of the electronic circuit, it is necessary to change all the battery production processes and the equipment and fixtures used for production, the parts shape, etc. according to various battery shapes, In order to meet the demands of various devices, there has been a problem that the cost of the battery becomes high.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and the purpose thereof is to manufacture a battery in the same battery production process and to require the battery in the final process. An object of the present invention is to provide a battery structure that can be arbitrarily manufactured according to the desired shape of the device.

[0004]

Means for Solving the Problems The present invention achieves the above object, and a positive electrode active material and a separator, which are partitioned by an insulator between opposing flat plate-shaped positive electrode current collectors and negative electrode current collectors. -,
Having a plurality of battery main parts made of negative electrode active material,
The battery has a thickness of 5 mm or less, the insulator is a material that can be deformed by pressure, the insulator protrudes at the peripheral portion of the battery, and a positive electrode current collector at the peripheral portion of the battery. An insulator is provided between the negative electrode current collectors, a liquid is not substantially eluted from the electrodes and the separator containing the positive electrode and the negative electrode active material, and a solid electrolyte (separator) is used as a material for the battery. Is also used),
The present invention is characterized in that a part of the battery is a space, and that a current collector and an insulator of the battery can be cut into an arbitrary shape, which solves the above problems.

[0005]

According to the present invention, a plurality of batteries can be formed between a series of positive and negative electrode current collectors to enable continuous battery production. Also, a battery can be manufactured into an arbitrary shape simply by cutting. Even if a hole (space) is provided inside the battery, airtightness is not impaired.
The airtightness of the internal battery main part is improved. Furthermore, the battery can be easily arranged in the space of the electronic circuit board of the device (for example, in a zigzag shape in an extreme case). The effect and action of each claim will be described below.

According to the second and ninth aspects, in order to realize the effect, the current collector can be cut into any shape. When the thickness is 5 mm or more, when cut, the insulator part may be deformed and the airtightness may be deteriorated. Claims 3 and 4
After cutting the main part of the battery, the insulator (which also serves as an adhesive) at the peripheral edge can be pushed out from the peripheral edge of the current collector. It is possible to prevent an electrical short circuit between them. In addition, when the battery is thin, the protruding insulator does not cut hands or the like at the edge of the metal current collector during handling. According to claim 5, the insulator is exposed at the outer circumference (and / or the inner circumference) of the battery by cutting at the insulator part including the collector between the battery main parts,
It prevents the deterioration of the electrode material in the main part of the battery to improve the battery life and prevents the material inside the battery from being exposed to the outside of the battery.
According to claim 6, not only the insulator part is cut as in claim 5, but also a part other than the insulator part is included (for example, when the battery main part is cut diagonally, the insulator is not included). There is a place.) Even if the material inside the battery is exposed at the cut end when cutting, it does not have an external effect. Claim 7
Thus, even if the same cutting as in the case of claim 6 is performed, the separator prevents the leakage to the outside of the battery because the solid electrolyte or the electrolyte is composed of the solid electrolyte. According to claim 8, even when an electronic component such as an IC is placed inside the place where the battery is placed on the side of the device using the battery, the battery can be placed around the electronic component while avoiding the electronic component ( That is, the battery can be formed with a hole provided in a part thereof, and the battery is not deteriorated because the insulator of the main battery inside has the airtight sealing property.

[0007]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a part of a plan view of a series of batteries in which a plurality of battery main parts 1 (thickness: about 0.3 mm) according to the present invention are formed. FIG. 2 shows a cross section taken along the line AA ′ of FIG. FIG. 3 is a cross-sectional view of FIG. 2 in which the insulator part is enlarged in more detail, and the positive electrode current collector 2 and the negative electrode current collector 3 are joined by heating and pressurization to seal the inside of the battery main part. The state in which the body (adhesive) 4 is deformed and slightly dented, and each current collector is dented at the bonding portion is schematically shown. A positive electrode active material 5, a solid electrolyte 7 (also serving as a separator) and a negative electrode active material 6 are arranged in the battery main part 1, and an insulator 4 (also serves as an adhesive) is adjacent to the adjacent battery main part. ) Are separated by. These battery main parts 1 are electrically connected in parallel. FIG. 4 shows a state in which a series of sheet materials composed of a plurality of battery main parts configured in this way are cut in a predetermined manner according to the battery placement space of the device (in this case, one battery is manufactured). This shows the case, and batteries of various shapes can be simultaneously manufactured by combining the cut portions (for example, the remaining battery main portion can be made into one battery). A battery 8 (shown in FIG. 5) is obtained by cutting at a portion indicated by a thick line in FIG. 4 (a portion corresponding to the insulator portion). This battery 8 has a hole inside. This hole 9
In some cases, the electronic components of the equipment may be arranged. FIG. 6 is a cross-sectional view taken along the line BB ′ in FIG. 5, showing a state where the insulator 4 (adhesive) is protruding to the outside at the end of the battery 8. In this way, the insulator portion at the cut end of the battery 8 protrudes to the outside, thereby preventing an electrical short circuit between the positive and negative electrode current collectors. Such protrusion of the insulator 4 can be formed by cutting the series of sheet materials to obtain the battery 8 and then reheating and pressing the peripheral portion of the battery.

(Embodiment 2) FIG. 7 is a plan view of the battery shown in FIG. 1 cut at a portion including a portion other than the insulator 4 of the battery main portion 1 (thickness is about 0.5 mm). . FIG. 8 is FIG.
FIG. 6 is a cross-sectional view of the CC ′ part of FIG. 7B, showing a state where the material inside the battery is exposed. Even if it is exposed in this way, in the present invention, the battery material does not elute (because the solid electrolyte is used, it does not leak), so it is safe.

The battery thickness described above is about 0.5 mm or less. However, even if it is necessary to increase the battery thickness to increase the battery capacity, if the battery thickness becomes 5 mm or more, the width is cut by cutting the insulator part. Is small (for example, 3 mm or less, and if the width is increased, the battery volume efficiency decreases), the cutting accuracy becomes poor and the defective rate of the battery sharply increases. That is, in the case of 5 mm or less, the defective rate is 1.2%, whereas it is 5 mm.
In the above cases, the defective rate is about 5.7%, and in the case of more than that, the defective rate is further increased. Regarding the service life related to the airtightness of the battery, the battery composed of a plurality of battery main parts according to the present invention is different from the conventional battery having one battery main part in the inner battery even if the same insulator is used. Since the main part remains, it is improved by about 3.6 times.

[0010]

As described above, the present invention has the following effects. (1) An arbitrary battery shape can be obtained simply by cutting. (2) An irregular shape such as a hole can be formed inside the battery. (3) A battery of any shape does not need to be significantly changed in the production process, which reduces the production cost. (4) It can be easily arranged in space on the printed circuit board of the device. (5) It is safe because there is no elution of battery constituent materials from the battery. (6) The airtightness of the main part of the battery is increased and the life is improved. (7) The surplus portion of the cut battery main portion can be used as another battery by combining the cut portion, and at the same time, various battery shapes can be obtained. (8) Even if a deformed battery is manufactured, there is almost no loss of materials such as the current collector, and the yield is high. It should be noted that the present invention is not limited to those shown in the examples, and the shape, number, and thickness of constituent parts of the battery, the material, thickness, constituent and shape of the insulator, and cutting (pressing method, lathe
The present invention is not limited to a specific method, such as the Ther method, cutter method, etc., and may be changed according to the application.

[Brief description of drawings]

FIG. 1 is a partial plan view of a battery main part group including a series of a plurality of battery main parts according to the present invention.

FIG. 2 is a cross-sectional view taken along the line AA ′ in FIG. 1, showing an internal state of a battery main part.

FIG. 3 is a cross-sectional view showing the shape deformation of the insulator part and the current collector part of FIG. 2 in more detail.

FIG. 4 is a plan view showing a state where a battery main part group according to the present invention is cut to obtain a battery.

FIG. 5 shows a plan view of the battery of the present invention obtained as in FIG.

6 is a cross-sectional view taken along the line B-B 'of FIG.

FIG. 7 shows another embodiment of the present invention and is a plan view of a battery in which a battery main part is also cut at a portion having no insulator.

8 shows a cross-sectional state of a C-C 'portion in FIG.

FIG. 9 is a plan view showing various conventional battery shapes.

[Explanation of symbols]

 1 Battery Main Part 2 Positive Electrode Current Collector 3 Negative Current Collector 4 Insulator (Adhesive) 5 Positive Electrode Active Material 6 Negative Electrode Active Material 7 Separator (Solid Electrolyte) 8 Battery 9 Hole

Claims (9)

[Claims] 1. A plurality of battery elements including a positive electrode active material, a separator, and a negative electrode active material, which are partitioned by an insulator, are provided between opposing flat plate current collectors and negative electrode current collectors. A battery characterized by. 2. The battery according to claim 1, wherein the battery thickness is 5 mm or less. 3. The battery according to claim 1, wherein the insulator is a material that can be deformed by pressure. 4. The battery according to claim 1, 2 or 3, wherein an insulator protrudes from a peripheral portion of the battery. 5. The battery according to claim 1, 2, 3, or 4, wherein an insulator is present between the positive electrode current collector and the negative electrode current collector at the peripheral portion of the battery. 6. The battery according to claim 1, wherein the liquid does not substantially elute from the electrode including the positive electrode and the negative electrode active material and the separator. 7. A solid electrolyte is used as a material for the battery, wherein the solid electrolyte is used.
Or the battery according to item 6. 8. The battery according to claim 1, wherein a space is present in a part of the battery. 9. The battery according to claim 1, wherein the current collector and the insulator of the battery can be cut into arbitrary shapes.
The battery according to 3, 4, 5, 6, 7 or 8.