JPS5925165A - Manufacture of lead battery - Google Patents

Abstract

PURPOSE:To realize introduction of a cast-on strap method of good production efficiency by making resistance welding between the pole bar provided at the pole group strap and terminal provided separately from said pole bar within the hole of resin part surrounding the lower part of said terminal. CONSTITUTION:A pole group 3 where a pole bar 4 is integrated to a pole group strap 5 is obtained by the cast-on strap method where the melted lead is poured into the mold. Thereafter, a terminal 9 prepared separately is placed on the pole bar 4, the electrodes 15, 15' are respectively placed in contact with the upper surface of terminal 9 and the lower surface of pole bar 4 and are subjected to the resistance welding under pressure. Simultaneously, a hole 11 is filled with lead and hermetically sealed. After welding the terminal 9 and pole bar 4 together as described above, the pole group 3 is inserted into a battery jar 1, this battery jar 1 and the cover 2 are joined together using a thermal plate and simultaneously the resin part 10 and the lower part of cover 2 are thermally fused together. Thereby, tightness for liquid of terminal can be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a storage battery of the type in which a resin part surrounding the lower part of the terminal is thermally welded to the back of the lid to maintain the liquid tightness of the terminal part.

In the conventional manufacturing of this type of storage battery, as shown in FIG. 8, a resin portion C is integrally formed on a lead alloy member consisting of a terminal A and a pole pole B by injection molding to form a so-called resin-wound terminal pole pole. The pole group F as shown in FIG. 9 is obtained by welding it to the pole group strap E using a burner during assembly. However, with this method, the pole group strap E and the resin-wound terminal pole post must be welded using a burning method, and the highly productive cast-on strump method, which allows the pole group to be formed integrally with the pole group strap, cannot be adopted. There was a drawback.

The present invention eliminates the above-mentioned drawbacks and makes it possible to introduce a cast-on strump method with high production efficiency. The present invention will be explained below based on one embodiment.

First, in FIGS. 1 to 7, 1 is a battery case made of thermoplastic synthetic resin such as polypropylene.

2 is a lid made of the same material as container 1, and 3 is a group of poles.

4 is a body pillar formed integrally with the pole group strap 5.

6 is a welding protrusion provided at the tip of the pole post 4, and 7 is a tapered stepped portion provided at the base of the welding protrusion B.

Reference numeral 8 indicates four parts formed on the side surface of the welding protrusion 6, 9 indicates a terminal separate from the pole post 4, 10 indicates a resin part integrally injection molded with the terminal 9 so as to surround the lower part of the terminal 9, and 11 indicates a A hole formed in the lower part of the resin part 10.

12 is a protrusion formed on the lower end 16 of the terminal exposed in the hole 11; 14 is a protrusion formed on the inner wall of the hole 11 of the resin part 1D corresponding to the four parts 8 of the welding protrusion 6; 15 and 15' is the electrode of an electric resistance welding machine.

16 is a welded portion between the terminal 9 and the pole post 4.

Next, to explain the method of the present invention in the order of steps, first, by the cast-on strap method, in which molten lead is poured into a mold,
A pole group 6 is obtained in which a pole column 4 as shown in FIG. 6 is integrally formed with a pole group strap 5. Next, a separately prepared terminal 9 as shown in FIGS. 2 and 3 is placed on the pole post 4, and as shown in FIG. Resistance welding is applied to the bottom surface with pressure F, and hole 11 is
Fill it with lead and seal it. After welding the terminal 9 and the pole post 4 in this way, the pole group 6 is inserted into the battery case 1, and the battery case 1 and the lid 2 are joined using a hot plate, and at the same time, the resin part 1G and the bottom surface of the lid 2 are connected. By thermally welding the two, a storage battery with liquid-tight terminals ensured as shown in FIG. 1 can be obtained.

In addition, in the above embodiment, an example was shown in which the recess 8 and the projection 14 were provided as positioning means at the fitting portion of the pole post 4 and the resin part 10, respectively, but these may be provided at opposite positions.
Further, instead of the uneven portion, the cross-sectional shape may be triangular, and the rectangular shape may be any other polygonal shape.

Furthermore, there is also a stepped portion 7 provided at the base of the welding protrusion B.

In the embodiment, a tapered shape is shown, but it can also be a flat shape. However, if the contact area between the stepped portion 7 and the resin portion 10 is too large, the biting will be poor and airtightness will become uncertain. It is desirable to do so.

Further, in the embodiment, an example is shown in which the terminal 9 is integrally molded with the resin part 10, but depending on the case, it is also possible to make the two parts separate.

Furthermore, the shape of the terminal 9 is not limited to that of the embodiment.

You can also use tapered wipes that do not have directionality.

In this case, the means for positioning the pole pillar 4 and the resin portion 1D may not be provided.

The protrusion 12 provided at the lower end 16 of the terminal is fitted into a mold when integrally molding the resin part 10 to the terminal 9, so that it is not exposed and prevents resin from flowing into the lower end 16 of the terminal. However, it is also possible to use a depression instead of this protrusion.

As described above, the present invention includes a pole post 4 provided on the pole group strap 5 and a terminal 9 separate from the pole post.

Since resistance welding is performed within the hole 11 of the resin part 10 surrounding the lower part of the terminal,
It is now possible to introduce a cast-on strap method that can integrally form both parts at once, and therefore productivity is dramatically improved compared to the conventional method described in vIJ.

In particular, when a positioning means is provided at the fitting part of the pole post 4 and the resin part 10, the workability in the process of welding the pole post 4 and the terminal 9 is improved, and the base of the welding protrusion 6 of the pole post 4 is When the stepped portion 7 is provided in the step portion 7, airtightness between the bright resin portion 10 and the pole column 1D can be maintained even more reliably.

The present invention, which has the above advantages, can be applied to various types of storage batteries, but is particularly suitable for storage batteries for motorcycles and storage batteries for automobiles.

[Brief explanation of drawings]

Figure 1 is a longitudinal sectional front view of the main parts of the storage battery according to the method of the present invention, Figure 2
Figures 4 and 6 are a partially vertical front view and bottom view of the terminal.
Figures 5 and 5 are a front view and a plan view of the pole group before terminal welding,
Fig. 6 is an enlarged view of the pole post part, Fig. 7 is a front view showing the lower plate when welding the pole post and terminal, Fig. 8 is a partially vertical front view of a conventional resin-wrapped terminal pole post, and Fig. 9 The figure is a front view of a conventional electrode group formed by welding the same resin-wound terminal pole column to the electrode group strut. 4: Pole column 5: Pole group strap 6: Welding protrusion 7: Step part 8: Four parts 9: Terminal 10: Resin part 11: Hole 14: Convex part Applicant Yuasa Battery Co., Ltd. Figure 5 Figure 6

Claims (1)

[Claims] 1) Manufacture of a storage battery characterized by resistance welding a Jfi group strut lamp pole pole and a terminal separate from the pole pole within a hole in a resin part surrounding the lower part of the terminal. Law. 2) The method for manufacturing a storage battery according to claim 1, wherein a positioning means is provided at the fitting portion of the pole column and the resin part. 3) The method for manufacturing a storage battery according to claim 1 or 2, wherein a welding protrusion is provided at the tip of the pole column and a stepped portion is provided at the base of the protrusion.