JPH0730445U - Battery plate terminal sealing part - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a plate-shaped terminal sealing portion of a storage battery capable of preventing liquid leakage along each edge of the plate-shaped terminal covered with an epoxy resin coating sealing layer. [Structure] A plate-like terminal 3 is adhesively fixed to a synthetic resin film 1 through an epoxy resin base coating layer 2. An epoxy resin coating sealing layer 4 is provided by covering and adhering the plate-like terminal 3 and integrating with the epoxy resin base coating layer 2. The edge portions 3a and 3b of the plate-like terminal 3 on the side covered with the epoxy resin coating sealing layer 4 are rounded.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a plate-shaped terminal sealing portion of a storage battery such as a film pack lead storage battery.

[0002]

[Prior art]

 As shown in FIG. 5, the plate-shaped terminal sealing portion of the conventional lead-acid battery has the plate-shaped terminal 3 made of lead foil bonded and fixed to the synthetic resin film 1 with the epoxy resin base coating layer 2 interposed therebetween. The structure was such that the epoxy resin coating sealing layer 4 integrated with the epoxy resin base coating layer 2 so as to cover 3 was provided. The epoxy resin base coating layer 2 and the epoxy resin coating sealing layer 4 are each formed by coating with an epoxy resin.

[0003]

[Problems to be solved by the device]

 However, in the plate-shaped terminal sealing portion of the conventional lead storage battery having such an epoxy resin coating sealing layer 4, the edge portions 3a and 3b of the plate-shaped terminal 3 on the side covered with the epoxy resin coating sealing layer 4 are Since it protrudes at a right angle, the wettability is poor, and there is a problem that the electrolyte leaks along the edge portions 3a and 3b when the terminal portion is mounted on a battery.

Incidentally, one side corner edge of the right-angled edge portions 3 a and 3 b of the plate-like terminal 3 on the side adhered to the epoxy resin base coating layer 2 is adhered to the epoxy resin base coating layer 2 and stands from this corner edge. Since the epoxy resin coating sealing layer 4 that hangs down from the top and accumulates is adhered to the rising corner side, it is sufficiently adhered, and there is no problem of liquid leakage along these edge portions 3a and 3b.

An object of the present invention is to provide a plate-shaped terminal sealing portion for a storage battery, which can prevent liquid leakage along each edge of the plate-shaped terminal covered with the epoxy resin coating sealing layer.

[0006]

[Means for Solving the Problems]

 To explain the constitution of the present invention which achieves the above-mentioned object, the present invention is that the plate-shaped terminal is adhered and fixed to a synthetic resin film through an epoxy resin base coating layer, and the plate-shaped terminal is covered and adhered to the epoxy resin base. In the plate-shaped terminal sealing portion of the storage battery provided with the epoxy resin coating sealing layer integrated with the coating layer, each edge portion of the plate-shaped terminal on the side covered with the epoxy resin coating sealing layer is Characterized by being rounded.

[0007]

[Action]

 By rounding the edges of the plate-shaped terminal on the side covered with the epoxy resin coating sealing layer in this way, the wettability of the epoxy resin at these edges is improved, so that the epoxy resin coating sealing layer is applied to these edges. Are bonded together to prevent liquid leakage along each edge.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The parts corresponding to those in FIG. 4 described above are denoted by the same reference numerals.

FIG. 1 shows a first embodiment of a plate-shaped terminal sealing portion of a storage battery according to the present invention. In this embodiment, the edge portions 3a and 3b of the plate-like terminal 3 on the side covered with the epoxy resin coating sealing layer 4 are preliminarily rounded to cover the plate-like terminal 3 having such edge portions 3a and 3b. An epoxy resin coating sealing layer 4 is provided which is adhered and integrated with the epoxy resin base coating layer 2.

When the edge portions 3a and 3b of the plate-like terminal 3 on the side covered with the epoxy resin coating sealing layer 4 are rounded in this manner, the wettability of the epoxy resin at these edge portions 3a and 3b is improved. Therefore, the epoxy resin coating sealing layer 4 is integrally bonded to the edge portions 3a and 3b, and liquid leakage along the edge portions 3a and 3b can be prevented.

FIG. 2 shows a second embodiment of the plate-shaped terminal sealing portion of the storage battery according to the present invention. In this embodiment, the respective edge portions 3a and 3b of the plate-like terminal 3 on the side covering the epoxy resin coating sealing layer 4 are preliminarily rounded, and the compatibility of the plate-like terminal 3 with the epoxy resin base coating layer 2 is satisfied. The rising side is raised with a gentle inclination so that the cross-sectional shape of the plate-like terminal 3 forms an isosceles trapezoidal shape.

The edge portions 3 a and 3 b of the plate-like terminal 3 on the side covered with the epoxy resin coating sealing layer 4 are rounded in advance, and the epoxy resin-based coating layer 2 of the plate-like terminal 3 is removed. When the rising side is raised with a gentle inclination so that the cross-sectional shape of the plate-like terminal 3 forms an isosceles trapezoidal shape, the epoxy in the part around each edge portion 3a, 3b of the plate-like terminal 3 is formed. Since the wettability of the resin is further improved, the epoxy resin coating sealing layer 4 is integrally adhered to the edge portions 3a and 3b, and liquid leakage along the edge portions 3a and 3b can be prevented. Further, the epoxy resin coating sealing layer 4 can be coated such that the thickness of the epoxy resin coating sealing layer 4 is substantially uniform in each part. Therefore, the reliability of the battery using this plate-shaped terminal sealing portion can be further improved.

FIGS. 3 (A) and 3 (B) show an example of a method for producing the plate-like terminal 2 used in the present invention. In this embodiment, as shown in FIG. 3 (A), a punching blade 6 having a punching recess 5 at its tip is rounded at both inner corners of the punching recess 5. With such a punching blade 6, the terminal forming plate 7 made of lead foil is punched as shown in FIG. In this case, the inner corners of the punching recess 5 are rounded, and the edges 3a and 3b are pressure-molded at this portion, so that the edges 3a and 3b are rounded.

The effect of the present invention was examined using a battery (2V-1.6 Ah) having a plate-like terminal sealing portion having the structure shown in FIG.

The plate-like terminal 3 of the present invention has a size of 20 mm × 5 mm × 0.1 mm, is manufactured by the method of FIG. 3, and has a shape with rounded edges 3a and 3b. The coating thickness of each of the epoxy resin base coating layer 2 and the epoxy resin coating sealing layer 4 is 0.2 mm.

The plate-shaped terminal 3 of the conventional product has dimensions of 20 mm × 5 mm × 0.1 mm, and is a rectangular parallelepiped of lead foil as shown in FIG. The coating thickness of each of the epoxy resin base coating layer 2 and the epoxy resin coating sealing layer 4 is 0.2 mm.

Each of the 50 batteries having the above-mentioned plate-like terminal sealing portion was prepared, and left at 60 ° C. and 98% RH for 3 years, and the leakage condition of the plate-like terminal sealing portion was examined every month. did. The result is shown in FIG.

In the conventional product, liquid leakage occurred from the 0.5th year, and in 3 years, 8 out of 50 batteries leaked. On the other hand, in the product of the present invention, no leakage occurred even after reaching 3 years. Therefore, the reliability of the battery is dramatically improved by using the plate-shaped terminal sealing portion of the present invention.

[0019]

[Effect of device]

 As described above, in the plate-shaped terminal sealing portion of the storage battery according to the present invention, since each edge of the plate-shaped terminal on the side covered with the epoxy resin coating sealing layer is rounded, the wettability of the epoxy resin at these edge portions is improved. For improvement, the epoxy resin coating sealing layer is integrally adhered to these edge portions, and liquid leakage along each edge portion can be prevented. Therefore, the reliability of the battery can be dramatically improved by using the plate-like terminal sealing portion of the present invention.

[Brief description of drawings]

1 is a cross-sectional view of a first embodiment of a plate-shaped terminal sealing portion of a storage battery according to the present invention.

FIG. 2 is a cross-sectional view of a second embodiment of the plate-shaped terminal sealing portion of the storage battery according to the present invention.

3A and 3B are explanatory views of a manufacturing process of the plate-like terminal shown in FIG.

FIG. 4 is a comparative diagram showing the relationship between the number of leaked liquids of a battery having a plate-shaped terminal sealing portion of the present invention and a conventional battery having a plate-shaped terminal sealing portion that is left in saturated steam.

FIG. 5 is a cross-sectional view of a conventional plate-shaped terminal sealing portion.

[Explanation of symbols]

 1 Synthetic Resin Film 2 Epoxy Resin Base Coating Layer 3 Plate-shaped Terminals 3a, 3b, 3c, 3d Edge Part 4 Epoxy Resin Coating Sealing Layer 5 Punching Molded Recess 6 Punching Blade 7 Terminal Forming Plate

Claims (1)

[Scope of utility model registration request] 1. An epoxy resin coating sealing layer in which a plate-like terminal is adhesively fixed to a synthetic resin film via an epoxy resin base coating layer, and the plate-like terminal is covered and adhered to be integrated with the epoxy resin base coating layer. In the plate-shaped terminal sealing portion of the storage battery provided with, each edge portion of the plate-shaped terminal on the side covered with the epoxy resin coating sealing layer is rounded, the plate-shaped terminal of the storage battery Sealing part.