JPH06196151A - Manufacture of sealed storage battery - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a method of manufacturing a sealed type storage battery, which eliminates electrolyte leak and corrosion caused by leak due to the influence of heating at the time of terminal welding, and is easy to manufacture and can reduce the number of steps. [Structure] A first step of accommodating an electrode plate group 8 in a synthetic resin battery case main body 6 of which one or two surfaces are open, and a step of welding and sealing the open surface with a sheet-like member 11. Step 2 and application of the thermoplastic conductive resin 1 to the lead-out terminal 4 formed integrally with the electrode plate group and sealing of the gap between the lead-out terminal 12 and the lead-out hole 12 for leading out the lead-out terminal of the battery case. Third to do at the same time
And the fourth step of joining the lead-out terminal 4 coated with the thermoplastic conductive resin and the external output terminal 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a sealed storage battery.

[0002]

2. Description of the Related Art Conventionally, a synthetic resin battery case having one or two open sides is used, and the open side is a sheet of synthetic resin film or a laminated metal plate composed of a synthetic resin layer and a metal layer.
Sealed storage battery welded and sealed with a toroidal member (see Fig. 2)
First, the electrode plate group 8 is first housed in the synthetic resin battery case body 6 having one or two open sides, and then the open side is made of a synthetic resin film or a laminar layer composed of a synthetic resin layer and a metal layer. To weld and seal with a sheet-shaped member such as a metal plate, and to prevent sulfuric acid from leaking from the inside of the battery, the lead-out terminal 4 pulled out from the battery case body and the lead-out terminal lead-out of the battery case After sealing the gap with the hole 12 for use with sulfuric acid resistant resin 5, the lead-out terminal 4 and the external output terminal 3 or the lead-out terminals are welded together by soldering 9 or the like. It is generally manufactured by filling.

[0003]

However, in the conventional method of manufacturing a sealed type storage battery as described above, the sulfuric acid resistant resin agent is burned by the heat of welding applied to the lead-out terminal, and sulfuric acid leaked from the sealing portion. There was a risk that the external output terminals and the welded parts would be corroded. In order to prevent this, there is a drawback that the conditions in the welding process such as soldering must be strictly controlled, especially after the sulfuric acid resistant resin agent is completely cured in order to maintain the sealing property of the resin. The necessity of soldering or the like impairs the continuity of work and has been a serious problem in the process. Further, since welding work in a minute portion surrounded by resin parts requires skill, a more reliable and simple connection method has been demanded.

Considering the conventional method from the viewpoint of workability, a considerable number of man-hours such as sealing with a sulfuric acid resistant resin agent, hardening of the resin, and soldering work on a minute portion are required.

The present invention has been made to solve the above problems, and an object thereof is to eliminate corrosion due to electrolyte solution leak and leak due to the influence of heating during terminal welding. Another object of the present invention is to provide a method of manufacturing a sealed storage battery which is easy to manufacture and can reduce the number of steps.

[0006]

According to the present invention, a first step of accommodating a group of electrode plates in a synthetic resin battery case main body whose one or two surfaces are opened, and the open surface is made of a synthetic resin film or a synthetic resin. A second step of welding and sealing with a sheet-shaped member such as a laminated metal plate composed of a resin layer and a metal layer, and a lead-out integrally formed on the electrode plate group using a thermoplastic conductive resin. A third step of simultaneously performing application to the terminal and sealing of the lead-out terminal lead-out hole of the battery case and the lead-out terminal, and joining the lead-out terminal coated with the thermoplastic conductive resin and the external output terminal A method for manufacturing a sealed storage battery comprising a fourth step; and, in addition to these four steps, a fifth step of coating the joint between the lead-out terminal and the external output terminal with a thermoplastic conductive resin. And a method for manufacturing a sealed storage battery, which comprises a By the production method characterized by using a thermosetting conductive resin it is intended to solve the conventional problems.

[0007]

The present invention is characterized in that the lead-out terminal is bonded to the external output terminal or the lead-out terminals by using a conductive resin. Therefore, since the resin is not burned by heat during welding, the reliability of sulfuric acid leak prevention of the sulfuric acid resistant resin can be perfected. In addition, it is possible to shorten the time because the soldering work in the minute portion is not required. Further, the conductive resin is filled in the gap between the lead-out terminal drawn out from the battery case body and the hole for leading out the lead-out terminal of the battery case, and the lead-out terminal and the external output terminal or the lead-out terminals are joined by the conductive resin. Since it is possible to prevent the leak of sulfuric acid and to join the lead-out terminal and the external output terminal at the same time, the work man-hour can be greatly reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing its embodiments. FIG. 1 is a diagram showing a sealed type storage battery according to an embodiment of the present invention. In manufacturing such a sealed type storage battery, first, the electrode plate group 8 is housed in a synthetic resin battery case body 6 having one or two open sides (not shown).
In addition, 13 is a recess for terminals provided outside the battery case.

Next, the open surface is a sheet of synthetic resin film or a laminated metal plate composed of a synthetic resin layer and a metal layer.
The flute-shaped member 11 is used for welding and sealing.

After the electrode plate group is housed and the open surface is welded and sealed with a sheet-shaped member, a suitable amount of the fluid conductive thermoplastic conductive resin 1 is applied to the lead-out terminal 4 to remove the resin. A part of the part flows into the gap between the lead-out terminal drawing hole 12 and the lead-out terminal 4 to prevent sulfuric acid leak.

Next, the external output terminal 3 is joined to the conductive resin 1 applied to the lead-out terminal 4, and the terminal recess 13 provided outside the battery case is filled with a resin material for embedding the terminal, so that the surrounding area of the terminal is reduced. Should be completed.

If the joint between the lead-out terminal 4 and the external output terminal 3 is covered with the thermoplastic conductive resin before the terminal recess 13 is filled with the resin material for embedding the terminal, a more reliable connection is achieved. be able to. A thermosetting conductive resin may be used instead of the thermoplastic conductive resin.

In the above-mentioned embodiment, the method of manufacturing the sealed lead-acid battery in which the lead-out terminal and the external output terminal are joined by the conductive resin is used, but the present invention is not limited to this, and the lead-out terminals are made of the conductive resin. It can also be joined.

[0014]

As described above, according to the method of manufacturing the sealed type storage battery of the present invention, the electrolyte leak or leak due to the burnout of the sulfuric acid resistant adhesive due to the heat at the time of welding the external output terminal.
It has the effect of eliminating corrosion due to burrs and the advantage that the number of work steps can be significantly reduced, and its industrial value is great.

[Brief description of drawings]

FIG. 1 is a diagram showing a main part of a sealed storage battery according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a conventional sealed storage battery.

[Explanation of symbols]

 1 Conductive resin agent 3 Battery external output terminal 4 Lead-out terminal 5 Sulfuric acid resistant resin agent 6 Battery case 7 Safety valve 8 Electrode plate group 9 Soldering 10 Terminal-filling resin agent 11 Sheet-like member 12 Lead-out terminal drawing hole 13 Recess for terminal

Claims (3)

[Claims] 1. A first step of accommodating a group of electrode plates (8) in a synthetic resin battery case body (6) having one or two open surfaces, and the open surface having a synthetic resin film or a synthetic resin layer. A second step of welding and sealing with a sheet-like member (11) such as a laminate metal plate comprising a metal plate and a metal layer, and a thermoplastic conductive resin (1) are used to integrally form an electrode plate group. Third step of simultaneously applying to the molded lead-out terminal (4) and sealing the gap between the lead-out terminal lead-out hole (12) of the battery case and the lead-out terminal (4), and thermoplastic conductive resin And a fourth step of joining the lead-out terminal (4) coated with and the external output terminal (3) with each other. 2. The method according to claim 1, further comprising: a fourth step; and a fifth step of coating a joint between the lead-out terminal (4) and the external output terminal (3) with a thermoplastic conductive resin. Method for manufacturing a sealed type storage battery. 3. The method for manufacturing a sealed storage battery according to claim 1, wherein a thermosetting conductive resin is used instead of the thermoplastic conductive resin.