JPH06310118A - Pack constituting battery - Google Patents

Abstract

PURPOSE:To completely prevent short-circuiting at the end of a battery by applying a resin coat to at least one surface of an insulating sheet, and thermally fusing the insulating sheet to the connecting piece with the coat resin. CONSTITUTION:In a resin-coated insulating sheet 14, an acryl resin coat 15 is formed in a thickness of about 5-100mum on one surface of flame retardant perchment paper. Figure shows a pack constituting battery where five cylindrical cells 1 are connected in series to each other. The sheet 14 is interposed between a connecting piece 2 for a drawing lead and another connecting piece 2 disposed across the adjacent cells 1, 1 in such a manner that the surface of the coat 15 is oriented toward the drawing connecting piece 2 for the drawing lead. The coat resin is melted with application of heat above 150 deg.C by a heater 4, to be thermally fused to the connecting piece 2 for the drawing lead. Consequently, it is possible to prevent deviation of the insulating sheet or deformation of the connecting piece due to an outside cause such as vibration or a shock during the use, so as to completely prevent short-circuiting at the end of the battery.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a battery pack.

[0002]

2. Description of the Related Art In recent years, as the cordlessness of office automation equipment and communication equipment has been further improved, a pack-constituent battery has been attracting attention as a power source thereof and has been widely used.

As shown in FIG. 2, in a conventional battery having a pack structure, a plurality of cylindrical batteries 1 are arranged side by side, and each battery 1 is connected in series by a connecting piece 2 such as a nickel ribbon welded to the end face of the battery. In order to prevent short circuit between the connecting pieces 2 and 2 and between the connecting piece 2 and the exposed surface of the battery 1, an insulating sheet 3 such as insulating paper is provided between the connecting pieces 2 and 2.
Was intervening.

In the figure, 10 is a resin case, 11 is a positive terminal, 12 is a negative terminal, and 13 are these terminals 11, 1.
2 shows a PCT-terminal support member for supporting 2.

[0005]

However, as shown in FIGS. 3 and 4, the above-mentioned conventional method alone causes connection pieces due to displacement of the insulating sheet 3 and deformation of the connection pieces 2 in the resin case 10 during use. There is a defect that short circuits occur between the batteries 1 and 1 due to the contact between the two and the two or the contact piece 2 contacting the end surface of the constituent battery 1.

Therefore, an object of the present invention is to solve the above-mentioned conventional problems and to provide a battery having a pack structure in which a short circuit between batteries due to a connecting piece is completely prevented.

[0007]

In order to solve the above-mentioned conventional problems, the present invention has three or more cylindrical batteries arranged side by side, a connecting piece for connecting each battery in series, and these connecting members. In a battery pack composed of an insulating sheet interposed between connecting pieces in order to prevent a short circuit between batteries due to one piece, a resin coat is applied to at least one surface of the insulating sheet, and the insulating sheet is formed by this coat resin. The connection piece was heat-welded.

As the coat resin, it is preferable to use a thermoplastic resin such as an acrylic resin, and it is preferable to form a resin coat having a thickness of 5 μm or more.

[0009]

[Function] A resin-coated insulating sheet is placed between overlapping connecting pieces, and the coating resin is heat-welded to the connecting piece, whereby the heat-welded connecting piece and the insulating sheet are integrated with each other, resulting in a displacement of the insulating sheet or a connecting plate. It is possible to completely prevent a short circuit between the batteries due to the deformation. Further, when a thermoplastic resin having excellent heat resistance such as an acrylic resin is used, the insulation sheet is not displaced and the connection plate is not deformed even when the battery temperature rises.

[0010]

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

FIG. 1 shows an assembled state of an embodiment of a battery having a pack according to the present invention, in which 14 is a resin coat 1.
5 shows an insulating sheet provided with No. 5. This resin-coated insulating sheet 14 has a thickness of 5 μm to 1 on one surface of flame-retardant sulfuric acid paper.
The acrylic resin coat 15 having a thickness of about 00 μm is formed. In the illustrated example, five cylindrical batteries 1 are connected in series, and the resin coating is provided between the connection lead connecting piece 2 and the connection lead connecting piece 2 between the adjacent batteries 1 and 1. The attached insulating sheet 14 is routed around the surface of the resin coat 15 and is interposed toward the lead connecting piece 2 side, and the heater 4
The coating resin was melted by applying heat of 150 ° C. or higher using the above, and was fixed to the lead connecting piece 2 by heat welding.

Like the conventional battery, the battery thus connected is housed in a resin case (not shown) and assembled as a battery pack. Incidentally, in FIG.
The same members as those of the conventional battery packs shown in FIGS. 4 to 4 are designated by the same reference numerals and detailed description thereof is omitted.

The insulation of the connection piece itself for the routing lead is not limited to the insulation by the resin-coated insulating sheet shown in the above embodiment, and a resin-coated lead may be used as the routing lead. It goes without saying that it doesn't matter.

[0014]

As described above, according to the present invention, the position of the connecting piece with respect to the insulating sheet is fixed by heat welding of the resin coated on the surface of the insulating sheet and the connecting piece. Displacement of the insulating sheet and deformation of the connecting piece due to external factors such as the above can be eliminated, and a short circuit at the battery end surface can be completely prevented.

[Brief description of drawings]

FIG. 1 is a front view showing a heat-sealed state in an embodiment of a battery having a pack structure of the present invention.

FIG. 2 is an external view showing a disassembled state of a conventional battery having a pack structure.

FIG. 3 is an external view of a battery having a conventional pack structure when a short circuit occurs.

FIG. 4 is an external view of a battery having a conventional pack structure when a short circuit occurs.

[Explanation of symbols] 1 Cylindrical battery 2 Connection piece 3 Insulation sheet 4 Heater 10 Resin case 11 Positive terminal 12 Negative terminal 13 Terminal support member 14 Insulation sheet with resin coating 15 Resin coating

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Saburo Nakatsuka 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. Three or more cylindrical batteries arranged side by side, connecting pieces for connecting each battery in series, and an interposing member between the connecting pieces to prevent short circuit between the batteries due to these connecting pieces. In a battery pack composed of an insulating sheet to be mounted, a resin coat is applied to at least one surface of the insulating sheet, and the insulating sheet is heat-welded to the connecting piece by the coat resin. Component battery.