JPH05205725A - Terminal structure of thin battery - Google Patents

Abstract

PURPOSE:To form a battery with the only thermocompression welding, and maintain the thinness, and facilitate the installation of a battery in an equipment by providing a lug part in a current collecting body, and bending it, and making a projecting terminal of a linear member. CONSTITUTION:In a thin lithium battery, the positive electrode active material 3 is held by a positive electrode current collecting body 2, which is provided with a lug part 1, except for the inside peripheral part thereof, and thereafter, the positive electrode current collecting body 2 is coated with the electrolyte. Next, the electrical insulating sealing agent 4 is adhered so as to coat the outer surface of the current collecting body 2 except for the peripheral part and the lug part 1. Furthermore, in a negative electrode current collecting body 5, a lug part 6 is provided similarly with the current collecting body 2, and the negative electrode active material 7 and the sealing agent 4 are adhered. Next, they are laminated, and the lug parts 1, 6 are bent to the outer surface side of each current collecting body. Furthermore, a linear member is located between the lug part and the sealing agent 4, and the sealing agent 4 is thermocompressed for welding on a heating plate of a sealing device under the reduced pressure to perform the pressure reduction sealing. Simultaneously, a projecting part is formed in the lug part at a position of the linear member to form a terminal. A battery can be held by only charging from a housing port.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal structure of a thin battery.

[0002]

2. Description of the Related Art Conventionally, the terminals of this type of battery are shown in FIG.
Terminals were provided at the corners or one end of the current collector as shown in FIG.
In such a structure, the battery capacity is reduced due to the reduction of the active material area due to the formation of the terminal portion, the terminal area of the battery is increased only by the protruding area, and the terminal structure on the device side using the thin battery becomes complicated. There was such a problem.

[0003]

SUMMARY OF THE INVENTION In view of the above problems, the present invention makes it possible to easily fabricate a terminal, does not require special processing on the current collector, and does not increase the battery mounting area of the device. , To simplify the structure of the terminal receiving portion.

[0004]

In order to achieve the above object, the present invention provides a thin battery in which current collectors each having a positive electrode active material and a negative electrode active material held on the inner surface are superposed on each other. By providing an ear portion on the current collector, bending each ear portion on the same surface side or the opposite surface side, and adhering the ear portion to an electrically insulating sealing agent coated so as to surround the outer surface of the current collector. A terminal is formed, and a linear member is arranged between the bent ear portion and the electrically insulative sealing agent, and a protruding portion is formed on a current collector portion corresponding to the linear member. It is used as a terminal.

According to the present invention, the active material is held on the inner surfaces of the negative electrode current collector and the positive electrode current collector having the ears at one end, and the edges are adhered with the electrically insulative sealant. An electrically insulating sealant is placed on the outer surface of the folded current collector, and a linear member is placed under the folded portion and thermocompression bonded from above to produce a terminal.

[0006]

EXAMPLES Details of the present invention will be described below with reference to examples. FIG. 3 is a perspective view of the positive and negative electrode current collectors used in the present invention. The positive electrode active material 3 is provided in a region excluding the inner peripheral edge of the positive electrode current collector 2 provided with the ear 1 of the thin lithium battery. After being held, the electrolyte is coated from above. Next, an electrically insulative sealing agent 4 was adhered so as to cover the outer surface of the positive electrode current collector 2 excluding the peripheral portion and the ear 1. Further, with respect to the negative electrode current collector 5, an ear portion 6 was provided on the same side as the positive electrode current collector 2, and the negative electrode active material 7 and the electrically insulating sealant 4 were bonded.
Next, after these were overlapped with each other, the ears 1 and 6 were bent to the outer surface side of each current collector as shown in FIGS. 4 and 5.
Further, after arranging the linear member 8 between the ears and the electrically insulating sealing agent 4, the battery is placed on the hot plate of the sealing device, and the electrically insulating sealing agent 4 is thermocompression bonded from above and below under reduced pressure. Then, the inside of the battery was hermetically sealed under reduced pressure. Simultaneously with thermocompression bonding, protrusions 9 and 10 were formed on the ears 1 and 6 of each current collector corresponding to the position of the linear member 8. The protrusions 9 and 10 were used as a positive electrode terminal and a negative electrode terminal.

The thin battery 11 manufactured in this manner is loaded into, for example, the battery storage port 13 of the pager 12 shown in FIG. 6 (terminals on the device side are provided on the upper and lower surfaces, but not shown). You can hold the battery just by doing.

FIG. 7 shows another embodiment in which the positions of the ears and the protruding terminals are changed.

[0009]

According to the present invention, the current collector can be provided with an ear portion, and the ear portion can be bent to form a projecting terminal by a linear member, and the current collector can be formed by thermocompression bonding without any special processing. Can be formed. In addition, the original thinness of the thin battery can be maintained, making it easy to install in equipment. Further, it is easy to use for a card-shaped device characterized by thinness, and its industrial value is extremely large.

[Brief description of drawings]

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

FIG. 2 is a perspective view of a conventional thin battery.

FIG. 3 is a perspective view of a positive electrode current collector and a negative electrode current collector of the thin battery of the present invention.

FIG. 4 is a perspective view of the thin battery of the present invention.

FIG. 5 is a side view of the thin battery of the present invention.

FIG. 6 is a perspective view of a pager using the thin battery of the present invention.

FIG. 7 is a perspective view showing one of terminal portions which is another embodiment of the present invention.

[Explanation of symbols]

 1 Ear Part 2 Positive Electrode Current Collector 3 Positive Electrode Active Material 4 Electrical Insulating Sealing Material 5 Negative Current Collector 6 Ear Part 7 Negative Electrode Active Material 8 Linear Member 9, 10 Projection Part (Terminal) 11 Thin Battery 12 Pager 13 Battery compartment

Claims (2)

[Claims] 1. A thin battery comprising a positive electrode active material and a negative electrode active material each having an inner surface on which current collectors are superposed on each other, wherein each electrode current collector has an ear portion, and each ear portion is the same. A thin type characterized in that a terminal is formed by bending the surface side or the facing surface side respectively and adhering it to an electrically insulating sealing agent coated so that the ears surround the outer surface of the current collector. Battery terminal structure. 2. A linear member is disposed between the bent ear portion and the electrically insulative sealing agent, and a protrusion is formed on a current collector portion corresponding to the linear member, and the protrusion is a terminal. The terminal structure of the thin battery according to claim 1, wherein: