JPH0917413A - Manufacture of lead-acid battery - Google Patents

Abstract

PURPOSE: To conduct welding of an electrode plate group shelf portion stably by moving the lug portions of electrode plates, which are positioned at right and left ends in a loading direction among the electrode plates constituting an electrode plate group of a lead-acid battery welding, inward in the loading direction so as to weld the same. CONSTITUTION: In a lead-acid battery in which a shelf portion 1 is burner-welded to the lug portions of electrode plates 2 having the same polarity so as to assemble an electrode plate group, the lug portions of electrode plates 3, 3, which are positioned at right and left ends in a loading direction of the electrode plates 2, are moved inward in the loading direction so as to weld the same. It is desirable that the bias measurement of the lug portion is 1.5mm or more and the moved lug portions are covered by the lead of the shelf portion 1 by 1.5mm or more. Thereby, the welding performance of end plates 3, 3' is improved, and the break of the end plates 3, 3' resulting from corrosion, vibration, and the like is avoided so as to prevent the burst of the battery.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing method for forming a shelf portion for connecting the ears of the same polarity electrode plate by burner welding with a gas burner.

[0002]

2. Description of the Related Art In recent years, a high load battery has been required for a lead acid battery for an automobile due to a trend of development specifications of the automobile. Even if the battery size is the same, the number of electrode plates is increased to increase the capacity. It is in.

A conventional method of manufacturing a plate group shelf will be described below. FIG. 3 shows a conventional electrode plate group. In FIG. 3, 1 is a shelf portion, 2 is an electrode plate, 3 and 3'are electrode plates positioned on the left and right, 4 is an inter-cell connection body, and 6 is Indicates the width of the shelf. For a certain shelf width 6, the number of electrode plates 2 is increased to support high capacity, but the space of the shelf 1 is limited due to the width of the cell chamber, and as the number of electrode plates increases, the end plate In particular, the edge of the left end plate 3 is not covered with lead, and the weldability tends to deteriorate. Therefore, it suffices if the ears of the end plate 3 can be covered with lead, but the end plate 3 cannot be covered with the conventional configuration in which the electrode plate ears are straightened. If the shelf width 6 has a dimensional allowance with respect to the battery cell chamber width,
It is possible to adjust the thickness of the electrode plate group appropriately by forming ribs on the inner wall of the battery cell and cover the ears of the end plates with the lead of the shelf 1. However, the high capacity type battery is Since the electrode plate configuration is increased to the cell chamber width dimension to maximize battery performance, the conventional configuration has no allowance between the shelf width 6 dimension and the battery cell cell chamber width dimension. A defect occurs. When the weldability deteriorates and the battery is assembled into a battery as described above, the connecting portion between the electrode plate and the shelf portion may break during use of the battery due to crevice corrosion, and the battery may burst due to sparks at this time.

[0004]

However, in the above construction, the number of electrode plates increases for a certain shelf width and the shelf space becomes insufficient. Therefore, the edge of the electrode plate at the end is covered with lead in the shelf. Was no longer possible and welding failure had occurred. In addition, there was a problem that the battery bursts due to the spark at the time of breaking.

The present invention solves the above-mentioned conventional problems, and provides a manufacturing method capable of stably welding the electrode plate group shelf even in the case of a high capacity battery having a large number of electrode plates. .

[0006]

In order to solve the above-mentioned problems, according to the manufacturing method of the present invention, of the electrode plates constituting the electrode plate group, the ear portions of the electrode plates located at the left and right ends in the loading direction are loaded. It is made to weld inward in the direction, and preferably, the ears have a biased dimension of 1.5 mm or more. Furthermore, the ears that are moved inward are covered with lead for 1.5 mm or more.

[0007]

With this structure, the ears of the left and right end plates of the electrode plate group are brought inward in the stacking direction, so that the ears of the end plates are covered with the lead of the shelf. It is possible to solve the problem that the weldability of the end plates in the electrode plate group is increased, the electrode plates are not broken due to corrosion, vibration, etc., and the battery is ruptured due to sparks when the electrode plate ears are broken. Like

Particularly, such as a high capacity battery, the shelf width of the electrode plate group is close to the width of the cell chamber of the battery case, and it is particularly effective for a battery having no dimensional allowance.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a plate group according to the method of the present invention,
In the figure, 1 is a shelf portion, 2 is an electrode plate, 3 and 3'are electrode plates (end plates) located at left and right ends, and 4 is an inter-cell connection body. Reference numeral 5 indicates a dimension of the end plate ears covered with lead in the shelf portion, and reference numeral 6 indicates a width dimension of the shelf portion. FIG. 2 is a schematic view of a battery case in which this electrode plate group is housed in a cell chamber. 7 is the pitch dimension between the cell chambers, 8 is the cell chamber dimension between the ribs 10 provided in the normal battery case, and 9 is the height. The dimensions of the capacity type cell chamber are shown below. The dimension between the cell chambers is determined by the battery size, and the width of the shelf portion in the battery cell chambers 8 and 6 is 6
Are designed by battery capacity.

If the width dimension 6 of the shelf is larger than that of the battery case cell chamber 9, it is possible to raise the rib 10 on the inner wall of the battery case cell to appropriately adjust the thickness of the electrode plate group. In the case where the electrode plate configuration is increased to the battery cell size to maximize the battery performance, like the capacity type battery,
There is no room for the width 6 of the shelf and the size 9 of the battery case.

As described above, when the width dimension 6 of the shelf portion approaches the battery cell cell chamber dimension 9 and there is no dimensional allowance, the lead cover dimension 5 of the end plate decreases, and the shelf portion and the end plate ear portion. The weldability with In order to solve this problem, like the pole plate group of the present invention, only the ears of the end plates 3, 3'positioned on the left and right of the pole plate in the stacking direction are moved to the inner side in the stacking direction and the shelf lead is used. A shelf 1 was formed by welding so that the ears of the end plates were covered by 1.5 mm or more.

The occurrence of defects during shelf welding of the electrode group shelf shape test product according to the present embodiment and the conventional electrode group shelf shape is shown in comparison with (Table 1).

[0014]

[Table 1]

As is clear from this (Table 1), the electrode plate group shelf shape according to the method of the present embodiment has good weldability between the edge of the end plate and the shelf, and the end plate is welded to the shelf. It can be seen that the property is excellent in terms of the number of defectives and the defective rate. In addition, the size that the end plate is moved inside the electrode plate group to cover the end plate is 1.5 mm.
It has been found that the above effects are exhibited.

As described above, according to this embodiment, the end plate ears of the electrode plate group are moved inward by 1.5 mm or more, and the ears are covered by the lead of the shelf by 1.5 mm or more so that the electrode plate (end plate) is The weldability of 1) is improved, the electrode plate is not broken due to corrosion or vibration, and the problem of battery rupture can be solved.

This is particularly effective for a battery, such as a high capacity battery, in which the width of the shelf portion is close to the width of the battery cell chamber and there is no margin in design.

[0018]

As described above, according to the present invention, in the manufacturing method for assembling the lead-acid battery electrode plate group by welding the shelves to the ears of a plurality of laminated electrode plates, the electrode plates are positioned on the left and right of the loading direction. Move only the edge of the end plate to the inside of the stacking direction by 1.5 mm or more,
Welding to the left and right end plates of the electrode plate group by welding with the lead of the shelf so as to cover the end plate ears of 1.5 mm or more, the electrode plate disconnection due to corrosion, vibration, etc. is eliminated, The problem of the battery exploding can be solved.

In particular, such as a high-capacity battery, it is effective in a battery in which the width of the shelves of the electrode plate group has no margin with respect to the width of the battery cell chamber, which leads to an improvement in quality.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an electrode plate group according to a manufacturing method of the present invention.

FIG. 2 Schematic diagram of battery case

FIG. 3 is a schematic diagram of a conventional electrode plate group configuration.

[Explanation of symbols]

 1 Shelf 2 Electrode plate 3 End plate 3'End plate 4 Inter-cell connection body 5 End plate lead cover dimension 6 Shelf width dimension 7 Battery cell cell dimension 8 Rib dimension 9 Cell chamber dimension 10 Rib

Front page continued (72) Inventor Masao Kitamura 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] 1. A method of manufacturing a lead storage battery in which a shelf is burner-welded to the ears of the same polarity electrode plate to assemble a plate group, and the ears of the electrode plates located at both left and right ends in the loading direction of the electrode plate are loaded. A method of manufacturing a lead storage battery, which is characterized in that welding is performed by pulling inward. 2. When the ears of the electrode plates located at the ends in the electrode plate stacking direction are brought closer to the inside, the eccentric dimension of the ears is 1.5.
The lead storage battery manufacturing method according to claim 1, wherein the lead storage battery has a thickness of at least mm. 3. An edge portion of an electrode plate located at an end portion in the electrode plate stacking direction is moved inward so that the edge portion of the electrode plate is covered with lead of the shelf for 1.5 mm or more. 1. The method for manufacturing a lead storage battery according to 1.