JPH0445936B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for sealing poles of storage batteries, particularly sealed storage batteries.

Conventional technology Conventionally, sealed storage batteries have been equipped with other parts other than the safety valve to prevent self-discharge due to oxygen gas flowing into the battery from outside the battery melter and to prevent dilute sulfuric acid, which is an electrolyte, from flowing out of the battery container. requires complete sealing. For this reason, the following pole column sealing method has been adopted. After making an opening at the bottom of the recess provided in the lid and passing the pole post through this opening, the annular rib that stands above the periphery of the opening is heated and melted, and the molten resin is used to bond the pole pole and the opening. There are methods such as sealing the pole by sealing the gap with the lid and filling the recess with adhesive, or passing the pole through the opening provided at the bottom of the recess of the lid, and then using rubber packing. Fit the sealing material to the pole pole, cover the gap between the opening and the pole pole from above,
A typical method was to seal the pole by filling the recess with an adhesive to surround the pole.

Problems to be Solved by the Invention Among these conventional methods, the former method is to close the gap between the pole pole and the opening provided in the lid after the synthetic resin battery case and the lid are welded together. , the process becomes complicated, and since the annular rib provided in the recess of the lid is heated and melted, the adhesive wraps around the pole and the surface area of the pole changes, resulting in insufficient adhesive strength and easy peeling of the adhesive. There was a problem that the probability of leakage of dilute sulfuric acid, which is a liquid, was high. On the other hand, in the latter method, a sealing material such as rubber packing is used, which poses a problem of increasing parts costs and work man-hours.

SUMMARY OF THE INVENTION The present invention is intended to solve these problems, and aims to provide a highly reliable pole pillar sealing method that can seal a pole part with good workability.

Means for Solving the Problem In order to solve this problem, the present invention provides an opening at the bottom of the recess formed in the lid made of thermoplastic synthetic resin, and extends downward from the inner periphery of the opening. After providing an annular rib and heating and melting this annular rib at the same time as the welded part of the lid and battery case, the pole pillar is passed through, and the gap between the pole pillar and the opening is filled with molten resin at the same time as the lid and battery case are welded. After that, the recess was filled with adhesive to seal the pole.

Function With this configuration, the gap between the pole column and the opening of the lid is closed by the molten resin inside the lid.
When filling the recess with adhesive, constant conditions can always be maintained, and the gap between the pole pole and the opening of the lid can be closed at the same time as the battery case and lid are welded together.

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

1 to 4 are sectional views of essential parts showing the process of sealing the pole pole in an embodiment of the present invention, in which 1 is a lid made of thermoplastic synthetic resin, which is heat-welded to a battery case 5 made of the same material. Ru. 6 is a group of electrode plates housed in the battery case.

In order to seal the pole column 3 connected to the electrode plate group with the lid 1, it is first necessary to thermally weld the battery case 5 and the lid 1. Figure 1 shows a hot plate main body 9, an upper hot plate 10, and a lower hot plate 1 in order to seal the battery case 5 and the lid 1 by heat welding.
1 is a diagram showing a preparation state in which the welded parts of the lid 1 and the battery case 5 are arranged so as to face each other with the lid 1 sandwiched therebetween. At this time, the upper heating plate 10 has a protrusion 12 that penetrates the opening 2 of the lid 1 and prevents the opening from being filled with molten resin.
is provided. In addition, the lower heating plate 11 has pole pillars 3.
A recess 13 is provided to prevent the objects from colliding. An annular rib 14 extending downward is provided on the inner periphery of the opening 2 of the lid 1 to ensure a sufficient amount of resin to close the gap between the pole and the opening.

FIG. 2 shows a state in which the heated hot plate from the state shown in FIG. 1 is sandwiched between the battery case 5 and the lid 1 from below and above to melt the resin. At this time, the inside of the lid in the opening 2 is melted in the same manner as in the melted state for thermally welding the battery case and the lid.

Remove the hot plate from the state shown in Figure 2 and open the lid 1.
By butting the welded parts of the battery case 5 and the battery case 5 against each other, the battery case and the lid are thermally welded together as shown in FIG. However, the gap between the pole column and the opening before melting is closed with the melted annular rib resin on the inside of the lid, which does not affect the recess 4 at all.

After the closed state shown in FIG. 3, the external lead-out terminal 8 is soldered to the upper end of the pole post 3, and then the recess 4 is filled with adhesive 7 to cover the recess 4.
The pole can be sealed without leaking into the battery through the gap between the pole pole 3 and the opening 2. This state is shown in FIG.

FIG. 5 is a perspective view of the completed battery.

Effects of the Invention As described above, according to the present invention, the gap between the pole pole and the lid opening is closed with molten resin at the same time as the synthetic resin battery case and the lid are welded together, without using any sealing material such as rubber packing. This results in the effect that the pole pillars can be sealed well.

[Brief explanation of the drawing]

1 to 4 are sectional views of essential parts according to an embodiment of the present invention, and FIG. 5 is a perspective view of a completed storage battery according to an embodiment of the present invention. 1... Lid, 2... Opening, 3... Pole, 4...
... hollow, 5 ... battery case, 6 ... electrode plate group, 7 ... adhesive, 8 ... external lead-out terminal, 9 ... hot plate body, 1
0...Top hot plate, 11...Bottom hot plate, 12...Protrusion,
13... recess, 14... annular rib.

Claims (1)

[Claims] 1 An opening is provided at the bottom of the recess formed in the lid made of thermoplastic synthetic resin, and an annular rib extending downward is provided on the inner periphery of this opening, and this annular rib is connected to the welded part of the lid and the battery case. After heating and melting at the same time, the pole pole is passed through the opening, and at the same time as the lid and battery case are welded, the gap between the pole pole and the opening is closed with molten resin, and then the recess of the lid is filled with adhesive. A method for sealing a pole of a storage battery, comprising: sealing a pole by sealing the pole.