JPS604549B2 - Storage battery manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a storage battery of a type in which at least one inter-cell connection portion is provided at each of the upper and lower portions of the electrode plate group, and the cells are connected to adjacent cells at the upper and lower portions of the partition walls in a dew tank. This relates to a manufacturing method.

Storage batteries, especially lead-acid batteries, in which intercell twills are provided on both the upper and lower parts of the electrode plate group can improve the reaction efficiency of the electrode plate group and the utilization rate of the active material, resulting in higher performance and lighter weight as a battery. It is effective for However, on the other hand, it also had the following problems.

That is, firstly, it is necessary to provide straps on both the upper and lower parts of the electrode plate group, and to form a cell interlocking body that extends laterally while being connected to the straps of the brackets.
Because of this laterally protruding cell connecting body, when the electrode plate group is inserted into the battery case, the connecting body hits the upper end of the partition wall and obstructs the insertion, resulting in a deterioration of work efficiency.

Second, in order to weld the inter-cell wire body at the bottom of the electrode plate group to that of the adjacent cell, it is necessary to extend the connecting body as far downward as possible so that it is easy to incorporate the welding jig, etc. However, the actual depth of the lower bottom became deeper than necessary, and when the storage battery was completed, a considerably large amount of electrolyte had to be injected to reach the specified height above the electrode group. The amount of electrolyte becomes much larger than the required amount, making it unsuitable for reducing the weight of the battery.

The third method is to form the intercell twill at the bottom of the electrode plate group in the haze tank of the electrode plate group. The problem is that alignment with the through hole provided in the cell connector becomes difficult.

The present invention solves these conventional problems and provides a method for manufacturing a storage battery that is easy to work with, has high performance, and is lightweight. This problem was solved by liquid-tightly fixing the connection body for the intercell bowl at the bottom of the electrode plate group to the bottom of the dragon tank partition wall in advance in a storage battery of the type where cells are connected at the bottom.

Examples thereof will be explained below with reference to the drawings.

Figure 1 shows a rectangular cylindrical dew tank 1 with openings at both the top and bottom for use in the present invention, and a partition wall 2 that partitions the interior into a plurality of cell compartments has one cell spacer in each of the top and bottom parts. A through hole 3 is provided for connection.

Figure 2 shows a pair of connecting bodies 4a and 4b that are fixed to the through hole 3 at the bottom of the battery case, and each connecting body has a vertical flat part 41 that is in close contact with the partition wall 2, and a vertical flat part 41 that is integrally provided at the lower end of the vertical flat part 41. It is formed into an L-shaped cross section with a strap connection piece 42 projecting horizontally from each battery compartment, and the vertical flat part 41 of one connection body 4a has a connection piece 42 extending through a through hole in the partition wall 2 to connect the other side. A protrusion 44 is provided that fits into a through hole 43 provided in the body 4b. As shown in FIG. 3, the pair of connecting bodies 4a and 4b are pressurized toward the working wall 2 by a pair of pressurizing pieces 5a and 5b as shown by the arrow, and are connected to the protrusion 44 by the plasma arc welding means 6. The iron joint portion with the hole 43 is welded.

Note that 6a is a plasma generation power supply section. In this way, while fixing the connecting body to all the through holes at the bottom of the partition wall,
The electrode plate group 7 is prepared separately. As is well known, the electrode plate group 7 is made by stacking a predetermined number of positive and negative electrode plates with a separator interposed between them.
Connection ears 8a, 8b, 8c provided on both the upper and lower parts of each electrode plate
, 8d with connection straps 9a, 90, 9c, respectively.
9d, and cell indirect competitors 4a and 4b are integrally welded in advance to each of the intestinal and negative electrode straps at the upper part of the electrode plate group. or,
The straps 9c and 9d at the bottom of the electrode plate group are left as they are without any connecting bodies. Next, the electrode plate group 7 shown in FIG. 4 is inserted into each cell chamber of a haze tank in which the lower cell-interlinking body has been fixed in advance to the partition wall perforation as shown in FIGS. 5 and 6. At this time, the connecting bodies 4a and 4b fixed to the partition wall are connected to the pressure rib 10 which is integrally formed on the partition wall 2.
It is made thinner than the thickness of , so that the insertion of the electrode plate group will not be obstructed. As shown in FIG. 7, the electrode plate group 7 is inserted into each single tank chamber of the dew tank one after another or all at once, and its lower end strub hits the top of the strap connection piece 42 and its movement is stopped there.

At this point, the through hole or protrusion of the connecting body formed in the upper strap is facing the through hole in the upper part of the partition wall. Of course, when inserting this electrode plate group, since only a strap is formed at the bottom and there is no connecting body, insertion of the electrode plate group can be carried out extremely smoothly and easily without any hindrance.

Next, connect the intercell connectors at the top of the electrode plate group by welding,
After electrical resistance welding the straps 9c and 9d at the bottom of the electrode plate group and the connecting bodies 43 and 4b as shown in FIG.
and the bottom cover 14 are integrated with the upper and lower open □ ends of the battery case by thermal welding, thereby completing the storage battery.

This method of connecting cells at both the top and bottom of the plate group makes it extremely easy to connect cells at the bottom of the plate group, making it possible to shorten the depth of the bottom cover and the excess length at the bottom of the haze tank. 〈As a result, the battery itself can be made more compact, and the amount of electrolyte injected does not require a large amount of surplus liquid as in the past. The amount is sufficient to fill the unnecessary space of
Since the amount of electrolyte is small, it is extremely effective in reducing the weight of the battery.

[Brief explanation of the drawing]

Fig. 1 is a half-cut side view of the dew tank used in the embodiment of the present invention, Fig. 2 is a perspective view of a pair of connecting bodies fixed to the lower part of the partition wall of the haze tank, and Fig. 3 is a side view of a pair of connecting bodies fixed to the partition wall of the haze tank. 4 is a perspective view of the electrode plate group, 5 is a partially cutaway perspective view of the dew tank, 6 is a perspective view of the turtle tank viewed diagonally from below, and 7 is a cross-sectional view of the fixing process. The figure is a partially cutaway exploded side view showing the assembled state of the battery, and FIG. 8 is a diagram showing the connection between the lower part of the electrode plate group and the connecting body fixed to the haze tank partition wall. 1... Battery case, 2... Partition plate, 3... Through hole,
4a, 4b...pair of connecting bodies, 41...vertical flat portion, 42...horizontally extending strap connection piece, 7
...Pole group, 9a, 9b, 9c, 9d...
...Strap, 13...Lid, 14...Bottom lid. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Scope of Claims] 1. At least one through hole is provided in the upper and lower parts of each partition wall of a cylindrical battery case with both upper and lower parts open, and the through holes in the lower part of each partition wall are provided with holes that are in close contact with the partition wall. A pair of connecting bodies each having a vertical flat part and a strap connecting piece integrally provided at the lower end thereof and projecting horizontally into each cell chamber. A protrusion provided on one of the connecting bodies is connected to the through hole in the partition wall and the other side. After fitting it into the through hole or recess of the connecting body and fixing it liquid-tightly, the straps of the positive and negative poles and the connecting body were fixed to the upper part, and only the straps of the positive and negative poles were fixed to the lower part. 1. A method for manufacturing a storage battery, which comprises inserting a group of electrode plates, applying the strap at the lower part of the electrode plate group to the strap connecting piece at the lower part of the partition wall, and integrating the strap and the strap connecting body by electric resistance welding. 2. After the strap and the strap connection piece are integrated at the bottom of the plate group, the connection bodies for the positive and negative poles at the top of the plate group are connected to one of the connection bodies that passes through the through hole provided at the top of the partition wall. 2. The method of manufacturing a storage battery according to claim 1, wherein the protrusion is connected to a corresponding through hole of a different polarity connector of another electrode plate group via a partition wall.