JPH0353447A - Manufacture of lead storage battery - Google Patents

Abstract

PURPOSE:To improve the productivity of the title battery by pressing straps in a heated condition respectively into their corresponding strap insertion boles in a cover to be compulsorily inserted while heating and welding a battery jar and the cover together. CONSTITUTION:Pole-plate groups 14, 14' are received respectively in a monobloc type battery jar 1, then straps 4,4 ' are respectively heated before the battery jar 1 and a cover 2 are heated and welded respectively, and the straps 4, 4 ' are respectively pressed into their corresponding strap insertion holes in the cover 2 to be compulsorily inserted. Also at the same time, the battery jar 1 and the cover 2 are welded together and then the straps 4, 4' of the two adjacent pole-plate groups 14, 14' are joined together in a mutual strap joining space portion. Thus, two adjacent cells are mutually connected in the shortest distance from each other while the number of assembly processes can be considerably lessened to improve the productivity of the title battery.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an 8-ton lead battery, and more particularly to a method for connecting adjacent cells of a monoblock lead-acid battery.

Prior art and its problems Figures 8 and 9 show conventional embodiments.
In FIG. 8, 23 is a lid, a recessed part 24 is provided on the bottom wall surface of the lid 26, and a lead alloy stringer (hereinafter referred to as a strap) 25 is accommodated, which connects the recessed part 24K and the adjacent 7P. Next, the upper part of the partition wall 27 of the electrical pad 26 is also filled with a thermosetting resin (adhesive) 28. That is, the electric board 26 and the board 23 are bonded together with a thermosetting synthetic resin 28, and the adjacent set tvs 29, 29' are also connected.

This is an advantage in that it improves high-rate discharge characteristics by connecting adjacent cells at the shortest possible distance, and also aims to make lead-acid batteries lighter, cheaper, and more compact by omitting structural parts. Although this is a manufacturing method, it is basically a structure that can only be realized by using a thermosetting resin as a filling adhesive.

However, when filling the adhesive-filled groove of the crab with the adhesive, the groove was narrow and had a long distance, so it required an extremely large number of man-hours to fill the adhesive. Furthermore, thermosetting synthetic resins such as epoxy resins take a long time to harden (if it is too short, they will harden by the time the wood and lid are bonded together), so even if they are passed through a high-temperature curing oven, this curing time will not be enough. This was a major obstacle in implementing this. For example, in order to improve productivity, a long curing furnace is required, resulting in an enormous equipment area. The most fatal problem is that the material is cheap and has excellent chemical resistance, impact resistance, weather resistance, heat resistance, etc., and boridelopyrene resin, which is most suitable for lead-acid battery T tanks and lids, cannot be used. was there. This is because the resin basically cannot be bonded with an adhesive.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a method for connecting cells with excellent productivity, which eliminates the above-mentioned drawbacks.

Structure of the Invention The present invention has the structure as described in the patent claims.

Example An embodiment of the present invention will be described below.

In Figure 1, 1 is Monoblock 2! The turret and 2 are lids, each made of thermoplastic resin such as polyglopylene resin. 3 is a cover plate which is fixed to the top surface of M2 by ultrasonic welding or the like. Numerals 4a to 4e are straps connected across adjacent sections, and are accommodated in a nut trap accommodating portion (to be described in detail later) formed on the shaft 2.

5a and 5b are straps formed within the range of 1 cell ρ, and are accommodated in a strap accommodating portion shaped like the lid 2lc as described above. Reference numerals 6 and 6' denote positive and negative pole poles, which are respectively erected from straps 5a and 5b. Reference numeral 7 denotes a gas discharge port opened to the outside of the cell, through which the gas discharged from each cell is discharged. In Fig. 2, 8 is the heat welded part between the container 1 and the lid 2, 9 is the gas discharge port inside the cell, which communicates with the gas guide path 10, and finally the above-mentioned 7 ρ
The gas reaches the gas outlet 7 which is open to the outside. 11, 11' are a plurality of positive and negative electrode plates combined, and 'r! It is accommodated in each section of the L rod 1.

12, 12' are ears of the positive and negative electrode plates 11, 11',
The upper ends of the lugs 12, 12' of the positive and negative electrode plates are connected to the stopper 4. 15 is a separator 〇 The above positive and negative electrode plates 11, 11', separator 13 and strap 4 form an electrode plate group 14 〇 In Fig. 3 1,
The electrode plate groups 14 and 14' are housed in each section ivlfl of the rlf 51, and the heat welded portion 8 between the electrode 44i1 and the lid 2 is
are located below the lower ends 15, 15' of the straps 4, 4'. In FIG. 4, the peripheral wall shapes 16, 16' on the side surfaces of the struts 4, 4' are upwardly inclined inwardly, that is, trapezoidal, and the upper surfaces 17, 17' of the struds 4, 4' are It is flat.

In FIG. 5, reference numeral 18 denotes a stowage receiving section, which has nuthook insertion holes 18a and 18b penetrating through the shoe 2 and a strap joining space 18c.
The peripheral wall shapes f8L-1 and 18b-1 on the side surfaces of a and 18b are formed along the peripheral wall shapes 16 and 16' on the side surfaces of the stwogs 4 and 4';
It is shaped slightly smaller than the . In other words, in the normal state, the Nutwogg insertion hole 18a11 is inserted into the Nutwog 4, 4'.
It is shaped in such a dimensional relationship that even if an attempt is made to insert it into the normal position within 8b (positional relationship as shown in FIG. 3), it can only be inserted halfway. Reference numeral 19 denotes a bottom wall of the nutrap joint space 18c, and a lower surface 19a of the bottom wall 19.
and the lower ends 15, 15' of the straps 4, 4' (Fig. 3) mean that the straps 4, 4' are inserted into the stop insertion holes 18a.
118b (position threshold as shown in FIG. 3).

Next, I will explain the manufacturing method of 'Fl! tQ
After accommodating a predetermined number of positive and negative electrode plates 11, 11'td and separator 15 into each cell of 1, for example, the cast-on-trap method (in which molten lead alloy is poured into a strap-shaped mold, The nutrap 4 is formed by dipping the tips of the ears 12, 12' of the positive and negative electrode plates from above, melting the tips and welding them to a lead alloy to form the nuttrap 4. That is, the positive and negative electrode plate groups 14
, 14' are formed. Next, the strap 4 is heated using a heating means (for example, a heater 20 as shown in FIG.
A heating device with a built-in f! 21 to the top of Nuthoode 17, 1
7'.

At this time, if the heating device 21 is set to about 600°C, the stwodders 4 and 4' will be heated to about 250°C in about 8 seconds).
At the same time as heating and welding the LnI1 and the lid 2, attach the straps 4 and 4' to the strap insertion holes 18a and 18 of the gt2.
Press down on b and forcefully insert it. At this time, since the traps 4 and 4' are in a heated state, the peripheral wall surfaces 18a-1 and 18b-1 of the side walls of the stwogg insertion holes 18a and 18b
It is housed in a predetermined position (Fig. 3) while being melted.

Next, when a molten lead alloy, for example, is poured into the joint space 180, the molten lead alloy partially melts the side surfaces 22, 22' (FIG. 5) of the strap joint space 18c. Since the lil contact cells are filled in, the joining between the lil contact cells is performed within the strap accommodating portion 18.

Effects of the Invention As described above, the present invention presses and forcibly inserts the heated strap into the stopper insertion hole of the lid, and at the same time heat-welds the TPM and the lid. Not needed at all. Therefore, adjacent cells can be connected with each other through the shortest distance, the number of assembly steps can be extremely reduced, productivity can be improved with a small equipment area, and it is possible to use a polypropylene resin.

Further, since the circumferential wall surface of the side wall of the strap melts the circumferential wall surface of the side wall of the strap insertion opening of the lid, the two come into close contact with each other.

[Brief explanation of drawings]

Fig. 1 is an external perspective view of a lead-acid battery manufactured by the lead-acid battery #ing method of the present invention, Fig. 2 is a cross-sectional view of the main part at 1-1' in Fig. 1, and Fig. 3 is a main part between adjacent cells. Figure 4 is a cross-sectional view of the main part of the battery case with the electrode plate group attached to it, Figure 5 is a cross-sectional view of the strap accommodating part of the lid, and Figure 6 is a cross-sectional view of part 1 of Figure 5. Figure 7 is a cross-sectional view of the main part during heating of Nutfudde, Figure 8 is a vertical cross-sectional view of the main part between the adjacent 7~, showing a conventional example, and Figure 9 is a cross-sectional view of the main part during heating of the adhesive. FIG. 3 is a plan view when viewed from behind. 1... Monoblock type Dendan 2... Dong 14, 1
4'...Pole group

Claims (1)

[Claims] A monoblock battery case (1), a lid (2), and a group of electrode plates (1).
4) and (14'), and place the electrode plate group (14) and (14') in the monoblock battery case (1).
), then the straps (4) and (4') are heated, the battery case (1) and the lid (2) are heated and melted, and then the strap insertion hole (18a), ( 18b)
At the same time, the battery case (1) and the lid (2) are welded by pressing and forcibly inserting the straps (4) and (4'), and then the straps (4) of the adjacent electrode plate groups (14) and (14') are ), (4'
) are joined to each other in a strap joining space (18c).