JPH047544B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a sealed storage battery at low cost and with good productivity.

Conventionally, the method of exhausting air from a sealed storage battery in a monoblock container without free electrolyte is to collect the gas generated in each cell in an exhaust chamber and then exhaust it to the outside of the storage battery through an exhaust hole. However, this method requires an inner lid to form the exhaust chamber in addition to the lid, which has the disadvantage of complicating the manufacturing process. In addition, in order to maintain the liquid tightness of the cell-to-cell connection polarity through the partition wall, there is a method in which a notch is provided in the partition wall, the cell-to-cell connection poles are connected by welding, etc., and then the cell-to-cell connection poles are kept liquid-tight by double injection. Alternatively, methods have been adopted in which holes are made in the partition wall and the inter-cell connection poles are connected liquid-tightly by electrical resistance welding, but all of these methods not only require expensive equipment, but also The drawback was that production costs were also high.

The present invention eliminates the above-mentioned drawbacks, and will be explained in detail below using an example.

In the drawings, FIG. 1 is a plan view of a sealed storage battery according to the present invention, FIG. 2 is a side sectional view of the same essential parts taken along line A-A' in FIG. 1, and FIGS. 3, 4, and 5. 1 is a perspective view of the external appearance of a battery case, a lid, and an exhaust gas collecting wall, respectively.
and a sealed storage battery comprising a battery case 5 having a notch 4 for fitting into an exhaust gas collecting wall, and a lid 8 having an exhaust gas collecting wall joint 6 and an intermediate exhaust hole 7 at the lower part,
The battery case 5 and the lid 8 are molded from polyolefin synthetic resin. Electrode plate groups 10, 10', 10'' are inserted into each cell chamber 9, 9', 9'', and the inter-cell connection pole posts 11, 11' of adjacent cells pass through the inter-cell connection pole post notch 3. They are connected at the upper part 12. An exhaust gas collecting wall 13 is fitted into the notch 4 of the partition wall 2 for fitting into the exhaust gas collecting wall and the upper part 12 of the inter-cell connection pole pole to form an exhaust gas collecting chamber 14. Inter-cell connection pole column upper covering part 15,
It is provided with an internal exhaust hole 16, a partition fitting insertion piece 17, and a partition fitting insertion notch 18. Also, the lid 8 is a rubber valve 1
9. A microporous filter cover plate 22 having a microporous filter 20 and an external exhaust hole 21 is provided. Note that 23 is a terminal.

Next, a method of manufacturing a sealed storage battery according to the present invention having the above-mentioned configuration will be explained.As shown in FIG.
10' and 10'' are inserted, and after welding and connecting the upper parts 12 of the intercell connection pole columns 11 and 11' of the electrode plate group of the adjacent cell chamber, the exhaust gas collecting wall 13 is connected to the exhaust gas collecting wall of the partition wall 2. After fitting into the fitting notch 4 and the inter-cell connection pole upper part 12, the battery case 5, the upper part of the exhaust gas collecting wall 13, the lower part of the lid 8, and the exhaust gas collecting wall joining part 6 are thermally welded. At the same time, the exhaust gas collection chamber 14 having the exhaust gas collection notch 24 is formed, and the manufacture of the sealed storage battery 1 by the method of the present invention is completed.

As mentioned above, the cell-to-cell connection of the present invention is a simple insertion method, but in the sealed storage battery of the present invention, the electrolyte is absorbed into the glass mat and separator to eliminate free electrolyte, so the cell-to-cell connection is simple. Even if there is some gap in the part, self-discharge due to leakage in the part can be prevented.

As described above, the present invention allows the exhaust gas collecting chamber to be formed at the same time as the battery case and the lid are thermally welded by a simple method of inserting the exhaust gas collecting wall into the partition wall, and furthermore, the exhaust gas collecting chamber can be formed by covering the inter-cell connection pole pole. Since it can be fixed, it is possible to have a structure with excellent vibration resistance, and it is possible to manufacture an industrially extremely streamlined and low-cost storage battery.

[Brief explanation of drawings]

Fig. 1 is a plan view of a sealed storage battery manufactured by the method of the present invention, Fig. 2 is a side sectional view of the same essential part taken along line A-A' in Fig. 1, and Fig. 3 is an external perspective view of the battery case.
Figure 4 is an external perspective view of the lid viewed diagonally from below, Figure 5 is an external perspective view of the exhaust gas collecting wall, and Figure 6 is an external perspective view of the battery case with the electrode plate group and exhaust gas collecting wall inserted. be. 1: Sealed storage battery, 2: Partition wall, 5: Battery case, 6:
Exhaust gas collecting wall joint, 7: Intermediate exhaust hole, 8:
Lid, 9, 9', 9'': Cell chamber, 10, 10', 1
0″: Plate group, 11, 11′: Inter-cell connection pole column, 1
2: Inter-cell connection pole column upper part, 13: Exhaust gas collecting wall, 14: Exhaust gas collecting chamber, 15: Inter-cell connection pole column upper covering part, 16: Internal exhaust hole, 17: Partition wall insertion hole, 18: Partition wall Fitting insertion notch.

Claims (1)

[Claims] 1. Battery case 5, lid 8, and electrode plate group 10, 10', 1
0'' and an exhaust gas collecting wall 13, the container 5 has a plurality of cell chambers 9, 9', 9'', and the lid 8 has an exhaust gas collecting wall joint 6 and an exhaust gas collecting wall 13 at the bottom. The exhaust gas collecting wall 13 has an intermediate exhaust hole 7 surrounded by the gas collecting wall joint part 6, and the exhaust gas collecting wall 13 has an intercell connection pole column upper covering part 15, an internal exhaust hole 16, a partition wall fitting piece 17, and a partition wall. Then, the electrode plate groups 10, 10',
10'', then connect the intercell connection pole posts 11, 11' of the adjacent electrode plate groups 10, 10'', and then connect the exhaust gas collecting wall 13 to the battery case 5.
The battery case 5 and the upper part of the exhaust gas collecting wall 13 and the lower part of the lid 8 are then welded together to form the exhaust gas collecting chamber. 14 and the inter-cell connection pole pillars 11,
11. A method for manufacturing a sealed storage battery, characterized by performing a coating of 11'. 2. The method of manufacturing a sealed storage battery according to claim 1, wherein the exhaust gas collection chamber 14 is formed at the same time as the battery case 5 and the lid 8 are welded together.