JPH0660862A - Connecting terminal for thin type battery - Google Patents

Abstract

PURPOSE:To provide a thin type battery connecting terminal, easy in mounting/ demounting a battery and having thinness and flexibility, by providing a connecting terminal on an inner side corner part, composed of an elastic resin case and opposite to a thin type battery insertion port. CONSTITUTION:In a connecting terminal case 8 for a thin type battery, films of two layers of a laminate film layer and an adhesive layer are overlapped to be made a bag shape. In a connecting terminal 5' for a positive electrode and a negative electrode connecting terminal 6', in which copper coating is applied to a resin film; tips inside a case are inserted in the notched parts of the films respectively, and the other ends are exposed outside the case. In a battery insertion port, the upper surface film is manufactured shorter than the lower surface film. Consequently in inserting a thin type battery 1, it can be easily located in a case 8 by holding and inserting the battery 1 to/in the lower side region, and the positive electrode at the battery tip and the negative electrode terminal are closely fitted to respective connecting terminals 5' and 6', and also a tip part is bitten into between two films to be fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection terminal structure for electrically connecting a thin primary or secondary battery to an external device.

[0002]

2. Description of the Related Art Although commercialization of a card-size thin battery has been promoted, a connector for connecting a thin battery and a device (that is, a connecting terminal for a thin battery) has not yet been developed. The conventional connector was developed individually according to the type of current mass-selling battery, and it is not possible to take advantage of the thin and flexible characteristics of thin batteries. Therefore, the development of thin batteries and the development of connection terminals has been desired.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to make it easy to attach / detach a battery and to make it thin and flexible.

[0004]

In order to achieve the above object, the present invention provides a positive electrode active material between a positive electrode current collector and a negative electrode current collector,
In a thin battery connecting terminal for electrically connecting a thin battery in which a power generating element such as an electrolyte and a negative electrode active material is arranged to an external device, an inner corner portion having a thin battery insertion opening and facing the insertion opening The cross-sectional shape of the inner corner of the resin case is an acute angle, the connection terminal portion is linear, plate-shaped, or dot-shaped, The thickness of the resin case is 2 mm or less, the resin case is composed of a plurality of layers of resin film, the connection terminal is integrated with the resin film, and / or the resin film is resin. The problem is solved by forming at least a part of the case, and by making the surface length of the resin case in the thin battery insertion port in the battery insertion direction different between the upper and lower surfaces.

[0005]

According to claims 1 and 4, electrical connection to a device (for example, portable products; radios, tape recorders, etc.) without impairing the thin and flexible characteristics of the thin battery, This can be easily done by simply pushing the thin battery into the resin case. Further, the thickness of the device can be reduced by forming the structure of the present resin case inside the device (for example, by utilizing the lid portion or the like). According to the second aspect, the thin battery is strongly sandwiched at the acute angle portion so that it cannot be easily removed from the resin case, and the electrical contact becomes strong. According to the third aspect, the contact degree with the terminal portion of the thin battery is increased, and the voltage loss due to the contact resistance is eliminated. According to claims 5 and 6, the mechanical strength and elasticity of the resin case are increased and the holding of the connection terminal is facilitated. According to the seventh aspect, the thin battery can be easily inserted into the resin case only by placing the tip of the thin battery on the long surface of the resin case and shifting the thin battery laterally.

[0006]

EXAMPLES The details of the present invention will be described below with reference to examples. FIG. 1 is a perspective view of a lithium secondary battery 1 (length: about 53 mm, width: about 84 mm, thickness: about 0.3 mm) as an example of a thin battery, the outer surface of which is covered with a laminating film 2. And notches for positive and negative terminals at the ends (excluding the laminate film 2 and current collectors 3 and 4).
Is exposed) is provided. Reference numeral 5 denotes a hole for the positive electrode terminal, which serves as the positive electrode terminal. Further, 6 is a hole for the negative electrode terminal, which serves as the negative electrode terminal. Note that the positive electrode and the negative electrode may be configured in reverse. FIG. 2 shows a cross section taken along the line AA ′ of FIG. The power generation element 7 is arranged between the positive electrode current collector 3 and the negative electrode current collector 4. FIG. 3 is a perspective view of the thin battery connection terminal 8 of the present invention, and FIG. 4 is a cross-sectional view near the BB ′ portion of FIG. The thin battery connecting terminal case 8 is formed into a bag by laminating two layers of films (laminate film layer-adhesive layer). That is, the films 9 and 10 are made into one piece, and the films 9'and 10 'are also made into one piece, and they are overlapped with each other and the seam is adhered, and further, the films 9 and 10 at the ends are adhered to each other. It has a bag shape. The tip of the inside of the case of the positive electrode connecting terminal 5 '(a copper film is provided on the resin film) is inserted into the cut portion of the film 9', and the other end is exposed outside the case. Similarly, the negative electrode connection terminal 6 '(a resin film provided with a copper coating layer) is also inserted into the cut portion of the film 10', and the other end is exposed outside the case. Further, a film 11 as an electric insulating layer is adhered to the gap between the positive electrode connecting terminal 5'and the negative electrode connecting terminal 6 '. Also film 9, 9 '
The length L1 of the upper surface of the film is made shorter than the length L2 of the lower surface of the film 10, 10 '. That is, when the thin battery 1 is inserted from the battery insertion port 12, the thin battery can be easily placed in the elastic case 8 by applying the thin battery to the lower region (L2-L1) surface.

In the thin battery connection terminal case thus constructed, the upper surface (length L1) and the lower surface (length L2)
The cross-sectional shape of the inner corner of the resin case, which is formed by the two films described above, is an acute angle. When the thin battery is inserted, the positive electrode terminal 5 and the negative electrode terminal 6 at the tip of the thin battery come into close contact with the positive electrode connecting terminal 5'and the negative electrode connecting terminal 6 ', and the end surface of the battery bites into the joint of two films. Fixed. other

The function has the effect described in the section. Further, since one surface of the connection terminal is made of a resin film, it is well adhered and fixed to the connection terminal case for the thin battery. When the thickness of the thin battery connecting terminal case is 2 mm or more, the elasticity of the case increases the width of the case, and the inserted battery moves inside the case and the electrical connection is incomplete. May become. Further, in the case of 2 mm or more, ordinary connection terminals (for example, sockets) can be used, and it is not necessary to dare to configure the present invention. In addition, when the thin battery is arranged at an angle in the cross-sectional shape of the inner corner of the resin case, the contact degree between terminals exceeds 45 ° and the force with which the resin case presses the thin battery is weak, and the thin battery easily comes off. .

The resin film is folded back at the inner corners (resin film 9'and resin film 1) as a measure to easily make the cross-sectional shape of the inner corners of the resin case serving as the terminal portion into an acute angle.
0'is one resin film and the connection terminals 5'and 6 '
After being bonded to the film surface, the connection terminals are arranged on the same side or opposite side surfaces of the resin film by bending, and when the bent portion becomes an acute angle and the tip portion of the thin battery is inserted, it is firmly fixed. ) Can be produced. The elasticity of the resin case and the resin film can be changed according to the application. The material, positional relationship, thickness and size of the connection terminal, and the shape of the corners of the resin case and the resin film (the corner of the resin case facing the battery insertion opening is cut, The corners of the thin battery may be exposed from the case. In this case, the fixing of the thin battery and the connection with the connection terminal may be better.), The material and the thickness are particularly limited. Not something to do.

[0009]

As described above, the present invention has at least the following effects. (1) It is flexible and does not impair the characteristics of thin batteries. That is, the shape conforms to the shape of the thin battery. (2) The thin battery is firmly fixed inside the case and does not come out accidentally. (3) A flexible thin battery can be easily inserted into the case. (4) It does not impair the thinness of the thin battery. (5) The electrical connection is complete with a simple configuration.

[Brief description of drawings]

FIG. 1 is a perspective view of a thin battery.

FIG. 2 is an enlarged cross-sectional view of a portion A-A ′ in FIG.

FIG. 3 is a resin case as a connection terminal for the thin battery of the present invention.
In the perspective view of the battery, a state in which the thin battery 1 is inserted is indicated by a dotted line.

FIG. 4 is an enlarged cross-sectional view in the vicinity of a B-B ′ part in FIG.

[Explanation of symbols]

 1 Thin Battery 2 Laminated Film 5, 6 Terminals 5 ', 6'Connecting Terminal 8 Thin Battery Connecting Terminal 9, 9'Film 10, 10' Film 11 Film 12 Battery Insertion Port

Claims (7)

[Claims] 1. A connection for a thin battery for electrically connecting an external device to a thin battery in which a power generating element composed of a positive electrode active material, an electrolyte, and a negative electrode active material is arranged between a positive electrode current collector and a negative electrode current collector. A terminal for a thin battery, characterized in that the terminal is formed of an elastic resin case having a thin battery insertion opening and a connection terminal portion at an inner corner portion facing the insertion opening. 2. The connection terminal for a thin battery according to claim 1, wherein the inner corner of the resin case has an acute-angled cross-sectional shape. 3. The connection terminal for a thin battery according to claim 1, wherein the connection terminal portion has a linear shape, a plate shape, or a dot shape. 4. The connection terminal for a thin battery according to claim 1, 2 or 3, wherein the resin case has a thickness of 2 mm or less. 5. The thin battery connection terminal according to claim 1, wherein the resin case is composed of a plurality of layers of resin films. 6. The connection terminal is integral with a resin film and / or the resin film forms at least a part of a resin case.
The thin battery connection terminal according to 2, 3, 4 or 5. 7. The thin according to claim 1, 2, 3, 4, 5 or 6, wherein a surface length of the resin case in the thin battery insertion opening in the battery insertion direction is different between upper and lower surfaces. Type battery connection terminal.