JPS63266763A - Manufacture of plate group for lead-acid battery - Google Patents

Abstract

PURPOSE:To surely connect lugs and a strap by gradually thickening the lug of a plate toward the welding part with a strap. CONSTITUTION:The comb's teeth 5 of a welding tool 4 are fitted to the lugs 1 of plate, and a post is placed on a desired position of the welding tool 4. The lugs 1 and the post are melted together with additional lead with a burner to form a strap 3. The lugs, the post, and the strap 3 are thereby bonded together. Since the comb's teeth 5 are formed so as to gradually widen toward the welding surface from the lower part, the additional lead flows into the space between the lug 1 and the teeth 5, and the flame of the burner can reach the lower part of the welding surface. Therefore, the lugs and the strap are surly connected and decrease in strength of the welded part can be prevented.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement in a method for manufacturing a group of electrode plates for lead-acid batteries, which integrates the ears of the electrode plate, the strap, and the pole column (lead parts) by burner welding. be.

Prior Art Conventionally, the formation of a strap as a group of electrode plates was carried out in the following order.

First, the lug l of the electrode plate is cut to a predetermined length, and the tip of the lug L is polished with a brush.The rear corner electrode plate, cathode plate, and separator are assembled into a cell (stacked alternately). .Then, the ears 1 of the plurality of electrode plates constituting the unit cell are pressed against the welding comb 2, and the pole pillars (lead parts) are placed in a predetermined position on the welding comb 2, added by burner welding, and melted together with lead to form the battery. It is integrated with the strap 3 as shown in FIG.

Problems to be Solved by the Invention However, in the strap 3 made by the burner method, defects due to welding tend to concentrate at the welded part between the pole plate and the ear part 1, and the mechanical strength of this part is low. . This is because the part below the welded part does not reach the burner flame and is fixed as a group of electrode plates without being melted, whereas the part above the welded part that is integrated with the strap 3 is fixed.

Once melted, it solidifies and shrinks, so stress is thought to be concentrated at the boundary (welded part).

means to solve the problem The present invention eliminates the above-mentioned drawbacks.

By using the mallet part of the molten tin tool into which the ears are inserted, or by using a welding tool that gradually becomes wider toward the welding surface, additional lead is poured in during welding to thicken the welded part.

Additional lead flows into the space between the hammer and ear of the working welding tool, making it easier for the burner flame to reach below the welding surface.

Example: Insert the ear part 1 of the electrode plate into the mallet part 5 of the welding tool 4 so as to make contact with it, place the pole post at a predetermined position on the welding tool 4, and connect the ear part 1 and the electrode together with additional lead by burner welding. By melting the pillar to form the strap 3, the ear part l, the pole pillar, and the strap 3 are integrated. At this time, since the mallet part 5 is formed so that it becomes wider from the bottom toward the upper welding surface, the lead added by 1 flows into the space between the ear part 1 and the mallet part 5, and the burner flame or welding It reaches below the surface.

Therefore, in the past, flames tended to concentrate at the weld between the ear l and the strap 3, and the mechanical strength was low, but according to the present invention, the shrinkage stress during solidification is reduced.

Compared to conventional welding, it is difficult to concentrate in one place, and the thickness itself increases, resulting in even greater mechanical strength.

Effects of the Invention As described above, the present invention increases the thickness of the ear part of the electrode plate after burner welding toward the welded part with the strap, thereby preventing a decrease in the strength of the strap welded part and improving the strength between the ear part and the strap. It has enormous industrial value, such as being able to ensure a reliable connection.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of the main parts showing the state in which the ears of the electrode plate are inserted into the hammer part of the welding tool in the present invention, added with a burner, and made into a molten strap with lead, and Figure 2 is the conventional manufacturing method of the electrode plate group. It is a sectional view of the main part of the law. 1 is the ear part, 3 is the strap, 4 is the welding tool, 5 is the comb part

Claims (1)

[Claims] In the method in which the ears of the electrode plate are inserted into the comb part of the welding tool and melted together with lead to integrate the ears, strap, and pole post, the comb part that inserts the ears is attached to the upper welding surface from the lower part. 1. A method of manufacturing a group of electrode plates for a lead-acid battery, characterized by using a welding tool having a wider shape as the electrodes move toward each other.