JPH11111250A - Battery - Google Patents

Abstract

(57) Abstract: Provided is a battery in which an aluminum laminated sheet container (1) is bonded and fixed to an outer case (2) to prevent the lead wires (1a, 1a) from being cut even when subjected to vibration or impact. . SOLUTION: The front and back of an aluminum laminated sheet container 1 are adhered to the inner surface of an outer case 2 with double-sided adhesive tapes 3,3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for sealing a power generating element in a sheet container such as an aluminum laminate sheet.
The present invention relates to a battery containing the sheet container in an outer case.

[0002]

2. Description of the Related Art With the rapid miniaturization of portable electronic devices in recent years, there has been a demand for the development of lightweight, thin and high-energy density secondary batteries for batteries as power sources. ing. Therefore, a non-aqueous electrolyte secondary battery is used as a secondary battery having a high energy density, and a card-type battery that is lightweight and thin by making this non-aqueous electrolyte secondary battery into a card type has been conventionally developed. I have.

As shown in FIG. 4, a card type battery is constructed by housing an aluminum laminate sheet container 1 in which a power generating element is sealed between upper and lower cases 2a, 2a. The aluminum laminate sheet container 1 is a flexible or flexible sheet container in which the inside is sealed by overlapping and sealing the aluminum laminate sheets, and a flat power generating element is sealed inside the container together with the non-aqueous electrolyte. Is done. However, lead wires 1a, 1a connected to the positive and negative electrodes of the internal power generating element are drawn out of the aluminum laminate sheet container 1 with the sealing portions sealed. The upper and lower cases 2a, 2a are formed by integrally forming resin frames 2c, 2c on the periphery of the metal plates 2b, 2b by insert molding, respectively.
Are covered from above and below, and the resin frames 2c, 2c are overlapped and fused by ultrasonic welding to be integrated to form the outer case 2. In addition, these upper and lower cases 2
Before joining a and 2a, lead wires 1a and 1a drawn out of the aluminum laminate sheet container 1 are connected to terminals 2d and 2d provided on a resin frame 2c of the lower case 2a in advance.

[0004]

However, conventionally, an aluminum laminate sheet container 1 housed in an outer case 2 has been disclosed.
5, projections 2e, 2 provided on upper and lower cases 2a, 2a (only lower case 2a is shown in FIG. 5).
e only locked at the front ends. For this reason, when the aluminum laminate sheet container 1 is subjected to vibration or impact, the protrusion 2
Since the lead wires 1a, 1a are displaced or moved before and after bending between e and 2e, there is a problem that the lead wires 1a, 1a may be bent or broken, and the repetitive stress may cause disconnection.

The present invention has been made in view of the above circumstances, and a sheet container which is flexible even when subjected to vibration or impact by bonding the sheet container to the inner surface of an outer case with a double-sided adhesive tape or the like. It is an object of the present invention to provide a battery which does not cause a risk that the lead wire is disconnected due to displacement.

[0006]

According to the present invention, in order to solve the above-mentioned problems, a sheet container in which a power generation element is covered with a sheet material and sealed is accommodated in an outer case and connected to the positive and negative electrodes of the power generation element. In the battery in which the lead wire drawn out from the sealing portion of the sheet container is connected to a terminal provided in the outer case, the outer surface of the sheet container and the inner surface of the outer case are adhered by an adhesive means.

According to the present invention, the sheet container is bonded and fixed to the inner surface of the outer case.
The sheet container does not shift or move in the outer case, and disconnection of the lead wire can be prevented. The bonding means here is not limited to bonding in a narrow sense of solidifying or hardening on the bonding surface and bonding, but also includes a method of sticking the bonding surfaces to each other due to viscosity. In particular, in the present invention, since a flexible or flexible sheet container is bonded,
It is convenient to use a double-sided adhesive tape in which an adhesive is applied to both sides of the tape substrate.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of the present invention. FIG. 1 is an exploded perspective view showing the structure of a card-type battery, and FIG. 2 is a cross-sectional plan view showing the structure of a card-type battery. FIG. 3 is a longitudinal sectional view showing the structure of the card type battery. In addition,
Components having functions similar to those of the conventional example shown in FIGS. 4 and 5 are denoted by the same reference numerals.

In this embodiment, a card-type battery in which a non-aqueous electrolyte secondary battery is formed in a card-type as in the conventional example will be described. As shown in FIGS. 1 to 3, the card-type battery has an aluminum laminate sheet container 1 housed in an outer case 2 composed of upper and lower cases 2a. The inside of the aluminum laminate sheet container 1 is sealed by overlapping two flexible aluminum laminate sheets and sealing the periphery, or by folding one aluminum laminate sheet and sealing the periphery except for the fold. For example, a power generating element which is flattened by winding and crushing positive and negative electrodes via a separator is enclosed together with a non-aqueous electrolyte. However, the lead wires 1a, 1a connected to the positive and negative electrodes of the power generating element are drawn out by being sealed at the sealing portion of the aluminum laminate sheet container 1. The aluminum laminate sheet is a sheet in which a PET (polyethylene terephthalate) film, a polyethylene film, or the like is laminated on an aluminum foil, and can be sealed by heat welding by laminating the sides of the polyethylene film or the like and pressing with heat. Also, lead wires 1a made of metal,
Sealing is ensured by interposing an Eval resin film or the like in the drawer 1a.

The upper and lower cases 2a, 2a have resin frames 2c, 2c formed by insert molding on the periphery of metal plates 2b, 2b made of aluminum, stainless steel or the like. The resin frame 2c of the lower case 2a is provided with terminals 2d, 2d for connection to an electric circuit outside the battery.
Lead wires 1a, 1a drawn out of the aluminum laminate sheet container 1 are connected to these terminals 2d, 2d in advance. Further, on the resin frames 2c, 2c of these upper and lower cases 2a, 2a, projections 2e, 2e similar to the conventional one are protruded inward. In addition, these upper and lower cases 2
The components a and 2a are not limited to the combination of the metal plates 2b and 2b and the resin frames 2c and 2c, but may be composed of only one of a metal or a synthetic resin or a combination of another material.

In the aluminum laminate sheet container 1, double-sided adhesive tapes 3 and 3 are attached to the center of the outer surface of the aluminum laminate sheet on the front and back. Then, the upper and lower cases 2a, 2a are placed from above and below the aluminum laminate sheet container 1.
And the surrounding resin frames 2c, 2c are overlapped and fused by ultrasonic welding. Then, these upper and lower cases 2a, 2a have the aluminum laminated sheet container 1 inside.
The outer case 2 is integrally formed in a state of being housed.
In addition, the double-sided adhesive tapes 3, 3 attached to the aluminum laminated sheet container 1 are adhered to the inner surfaces of the metal plates 2b, 2b of the upper and lower cases 2a, 2a. Is securely adhered and fixed to the outer case 2. The upper and lower cases 2a, 2a
Is not limited to ultrasonic welding, but can be joined using any other means such as other welding means or adhesion. Further, the outer case 2 is not limited to the one in which the upper and lower cases 2a, 2a are joined to each other.
May be inserted into a thin box shape, or any other configuration that covers the entire periphery of the aluminum laminate sheet container 1.

In the battery having the above structure, the aluminum laminate sheet container 1 is fixed to the outer case 2 by adhesion. For this reason, when the flexible or flexible aluminum laminate sheet container 1 is locked only by the projections 2e, 2e at the front end portions, the weight of the internal power generation element causes the vibration or shock when receiving. The aluminum laminated sheet may be displaced or moved by bending, but according to the above configuration, the center portion of the front and back of the aluminum laminated sheet container 1 is fixed, so that the aluminum laminated sheet container 1 is almost integrated with the outer case 2 and is likely to be displaced or moved. No movement occurs. Therefore, lead wire 1
a, 1a is bent or bent, so that the lead-out portion from the aluminum laminate sheet container 1 and the terminals 2d, 2a
There is no danger of disconnection at the connection with d.

In the above embodiment, the double-sided adhesive tape 3 is used as the bonding means, but the present invention is not limited to this.
Other adhesives or adhesives such as epoxy resin and silicone rubber can also be used. In particular, the outer case 2
Is a box-like shape and the aluminum laminate sheet container 1 is inserted therein, the gap can be filled with these adhesives or adhesives.

Furthermore, although the aluminum laminated sheet container 1 is used in the above embodiment, the present invention is not necessarily limited to this, and a sheet container made of an arbitrary sheet material can be used, and the battery is also a card type. Not limited. In addition, the configuration of the power generating element sealed inside is arbitrary, and the present invention can be similarly applied to batteries other than the non-aqueous electrolyte secondary battery.

[0016]

As is apparent from the above description, according to the present invention, since the flexible or flexible sheet container is stuck to the inner surface of the outer case and cannot move, the battery is subject to vibration or impact. However, the sheet container does not shift or move in the outer case, and there is no risk that the load is applied to the lead wire and the lead wire is broken inside.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is an exploded perspective view showing a configuration of a card-type battery.

FIG. 2, showing an embodiment of the present invention, is a cross-sectional plan view illustrating a configuration of a card-type battery.

FIG. 3, showing one embodiment of the present invention, is a longitudinal sectional view illustrating a configuration of a card-type battery.

FIG. 4 is an exploded perspective view showing a conventional example and showing a configuration of a card-type battery.

FIG. 5 is a perspective view showing a conventional example and showing a state in which an aluminum laminated sheet container is housed in a lower case of a card-type battery.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Aluminum laminated sheet container 1a Lead wire 2 Outer case 2d Terminal 3 Double-sided adhesive tape

Claims (1)

[Claims] 1. A sheet container in which a power generation element is covered and sealed with a sheet material is accommodated in an outer case, and lead wires connected to positive and negative electrodes of the power generation element are pulled out from a sealing portion of the sheet container and provided in the outer case. A battery connected to the terminal, wherein an outer surface of the sheet container and an inner surface of the outer case are adhered by an adhesive means.