JPS5981865A - Formation method of strap for lead storage battery - Google Patents

Abstract

PURPOSE:To improve the workability of the connection between plates and accurately connect the plate without generating any distortion from the plate by fitting an insulating plate and a thin plate made of lead alloy with the insertion holes of the lug of each assembled element to the lug and making a heater device contact and fusing it. CONSTITUTION:An assembled element 5 is formed by alternately overlapping a number of anode plates 1 with slightly longer lugs 3 and cathode plates 2 with slightly longer lugs 4. A polyethylene insulating plate 6 with the insertion holes 7 of the lugs is fit in the lugs 4 and 3 and the same insertion holes 9 are provided on the upper part and then a lead or lead alloy thin plate 8 with an inter- cell connecting riser 10 is fit on one end. Then a heater device is made to contact from the upper surface of the thin plate 8 and is fused and then at the same time a strap is obtained by fusing it to the lug.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the method of forming a strap for a lead-acid battery, which improves workability in connection operations between electrode plates and ensures reliable connection without causing distortion of the electrode plates. The purpose is to form a wet strap.

In order to form a strap for connecting between the electrode plates in a conventional lead-acid battery, after combining the electrode plates and the seven-layer plate to form a plate group and fixing it to a welding table, a strap is attached to the top of the electrode plate group. A two-split welding mold with comb-shaped holes is placed, a part for connecting cells is placed in one end of the core mold, molten lead or lead alloy is poured into the mold, and the upper surface is set in flames. After welding to the ear part while heating, the mold is removed after cooling and the electrode plates are group welded. However, this process is extremely time-consuming and inefficient, and is extremely slow. Heat causes distortion between the plates, making it difficult to connect them reliably. Furthermore, in order to reliably connect the electrode plates, a large amount of lead or lead alloy is required, making the group weld heavy. Furthermore, there is a risk that molten lead or lead alloy may hang down on the side surfaces of the electrode plate group, which may contaminate the electrode plate group and require effort to remove.

The present invention has been made as a result of intensive research aimed at improving these drawbacks, and as a result has discovered a method for forming a strap that is easy to operate, does not cause distortion, is lightweight, and can reliably connect the electrode plates. That is, after fitting an insulating plate with an ear insertion hole and a lead alloy thin plate to the anode plate lug or cathode plate lug of an electrode plate group formed of a plurality of anode plates and cathode plates, L2 is inserted. An electric heating device is brought into contact with it from above, and the thin part ↑5 and the ear part are welded together.

The reason why the insulating plate is interposed in the method of the present invention is that when the heating device is brought into contact with the lead or lead alloy thin plate, heat is not directly applied to the electrode plate, so that there is no adverse effect on the electrode plate or the cell.

In addition, it is desirable that the ear part has a stepped part where the tip becomes thinner, and by making this shape, when fitting a lead or lead alloy thin plate to the ear part, it is easy to insert the ear part into the thin plate. The holes may be small. Therefore, the strength of the thin plate can be improved. Note that if the ears are rectangular, the holes for inserting the ears must be made larger, and the strength of the thin plate will decrease, so in order to achieve the required strength, the amount of lead will increase, which inevitably increases the weight. becomes.

An embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, a plurality of anode plates 17 having slightly elongated ears 3 and cathode plates 2 having slightly elongated ears 4 are stacked alternately to form an electrode plate group 5.

In this case, the ears 3 and 4 have a convex cross section.

After that, polyethylene insulating plates 6 having ear insertion holes 7 are fitted to the ears 3, J, 3, . . . and the ears 4゜4.4, respectively. Furthermore, a lead or lead alloy thin plate 8 having a similar insertion hole 9 in its upper part and a rising part 10 for connection between cell/b at one end is fitted therein.

Next, a heater is attached to the copper cylindrical body shown in FIG. 3 from above the thin plate, and a special heating device 10 is brought into contact with the thin plate, and the heat melts the thin plate and at the same time welds it to the edge, thereby forming a book as shown in FIG. 4. A strug for an invented lead-acid battery can be obtained.

In the method of the present invention, the ears of the electrode plates are not connected with molten lead, but 15! i: 'fJ8 I, it is sufficient to fill the small gap between the ear insertion hole provided in the lead alloy thin plate and the ear with lead alloy, and there is an insulating plate between this thin plate and the electrode plate. Because of this, heat is often applied to the electrode plates and cells at all, and this does not cause distortion, and since it is only necessary to attach the plates carefully, the number of crew members is kept to a minimum, and it is also possible to securely connect the plates between the plates. can be connected. Furthermore, since there is no chance of lead dripping from the side of the electrode plate, there is no possibility of contaminating the electrode plate.

[Brief explanation of the drawing]

1 to 3 are schematic illustrations showing the steps for forming a strap according to the method of the present invention, and FIG. 4 is a perspective view of the strap formed according to the method of the present invention. 1... Anode plate, 2... Cathode plate, 3... Anode plate lug,
4...1 (three electrode plate ears, 5...electrode plate group, 6...insulating plate, ?...ear insertion hole, 8...lead alloy thin plate, 9...
- Ear insertion hole, 10... rising part. Applicant's agent Patent attorney Takehiko Suzue Figure 1
@2 Whistle Figure 3 Figure 4

Claims (1)

[Claims] After fitting an insulating plate with an ear insertion hole and a lead alloy thin plate into the anode plate ear or cathode plate ear of an electrode plate group formed by a plurality of anode plates and cathode plates, 1. A method for forming a strap for a lead-acid battery, characterized in that the thin plate and the ear portion are welded by contacting the thin plate with a heating device.