JPH0636794A - Lead-acid battery - Google Patents

Abstract

PURPOSE:To reduce the part cost and simplify manufacture by arranging acid- resistant fastening plates on the outside faces in the stacking direction of electrode plate groups, fixing synthetic resin blocks on the outsides of the fastening plates fastened with tape-like bands, and fixing the electrode plate groups to a battery jar. CONSTITUTION:Fastening plates 4 having the proper thickness are arranged on both outsides of a positive electrode plate group 1 and a negative electrode plate group 2 separated by a separator 3, and they are fastened with bands 5. The band 5 is made of polyolefin resin having high acid resistance, crimp treatment is applied to the surface, and both ends are connected by thermal welding. Synthetic resin blocks 8 inserted from below between the fastening plates 4 and the bands 5 on both outsides of the fastening plates 4 in the stacking direction of the electrode plates fix the electrode plate groups when they are inserted into a battery jar 6. Problems such as the breakage of lug sections of the electrode plate groups and the defective airtightness of an electrode column caused by the shift of the electrode plate groups due to the gap between the electrode plate groups and the battery jar 6 can be resolved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in lead acid batteries.

[0002]

2. Description of the Related Art Conventionally, in lead acid batteries for electric vehicles, for example, among lead acid batteries, the pole group is designed to be slightly larger than the corresponding battery case and inserted while applying pressure from the outside,
Alternatively, in order to fill the gap between the battery case and the pole group with an acid-resistant synthetic resin or a valve fiber called a squeeze plate or a spacer made of polyethylene, something slightly larger than the gap is placed on both outsides of the pole group. By doing so, it has been designed to apply a predetermined compressive pressure to the pole group.

However, among these, the one in which the battery case is designed according to the pole group requires a battery case mold for each model,
On the other hand, with spacers placed on both outer sides of the pole group to apply tension, 2 to 3 sheets on one side depending on the model, and 6 in many cases.
Since some spacers have to be inserted, the work efficiency is lowered, and the component cost, that is, the battery manufacturing cost is increased. In an attempt to improve such drawbacks, a method has been proposed in which a band capable of being heat-welded is used to bind the pole group and maintain the tightness.

[0004]

The method described in the prior art has a drawback that a gap is created between the battery case and the pole group only by reducing the number of spacers, and the whole pole group becomes unstable.
The present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide a lead-acid battery that can reduce the cost of parts and can be easily manufactured.

[0005]

In order to achieve the above object, the present invention has an acid-resistant pressure plate on the outer surface of the pole group in the stacking direction and is bound by a tape-shaped band made of synthetic resin or the like. A block made of a synthetic resin is fixed to the outer surface of the pressure plate of the pole group, and the pole group is fixed to the battery case by interposing the block in the gap between the pole group and the battery case.

[0006]

[Operation] By interposing a block in the gap between the pole group and the battery case, the pole group will not be displaced laterally (the stacking direction of the electrode group) in the battery case.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing its embodiments. FIG. 1 is a partially cutaway perspective view of a lead storage battery showing an embodiment of the present invention. In the drawing, 1 is a positive electrode plate group in which positive electrode plates are connected by straps, 2 is a negative electrode plate group in which negative electrode plates are connected by straps, 3 is a separator interposed between the positive electrode plate and the negative electrode plate, 4 is a pressure plate made of synthetic resin, Reference numeral 5 is a heat-weldable band made of synthetic resin or the like, 6 is a battery case, 7 is a saddle placed on the bottom of the battery case, and 8 is a block made of synthetic resin arranged on both outer sides of the pressure plate.

The positive electrode plate and the negative electrode plate are separated by a separator 3, a pressure plate 4 having an appropriate thickness is provided on both outer sides of these pole groups, and a band 5 tightly binds these pole groups. There is. The band 5 is made of, for example, a polyolefin-based resin having high acid resistance, and has a textured surface, and both ends thereof are joined by heat welding. Further, the block 8 is fixed by inserting it from below between the pressure plate and the band on both outer sides of the pressure plate in the laminating direction of the electrode plates.
I try not to float up. Block 8
Is inserted between the pressure plate 4 and the band 5, and then inserted into the battery case 6 together with the pole group. In this way, the pole group is fixed in the battery case 6.

By the above work, problems such as breakage of the pole group ears caused by the movement of the pole group due to the gap between the pole group and the battery case and poor airtightness of the electrode columns can be solved. Although only one embodiment of the present invention has been described in detail above, various embodiments of the present invention are conceivable without departing from the spirit of the present invention. For example, the example in which the block is arranged between the band and the pressure plate has been described above, but in addition to this, the block may be directly welded and fixed to the pressure plate by using ultrasonic vibration, or an adhesive may be used. I can. Further, the pressure plate and the block do not necessarily have to be separate bodies, and may have a structure integrated in advance.

[0010]

As described above, according to the present invention, since the block made of synthetic resin is used, the cost of parts can be reduced, and furthermore, the pole group can be easily fixed in the battery case, so that the lead storage battery of low cost can be provided. .

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a lead storage battery showing an embodiment of the present invention.

[Explanation of symbols]

 1 positive electrode plate group 2 negative electrode plate group 4 pressure plate 5 band 6 battery case 8 block

Claims (1)

[Claims] 1. An acid-resistant pressure plate is arranged on the outer surface of the pole group in the stacking direction, and a synthetic resin block is fixed to the outer surface of the pressure plate of the pole group, which is tightly bound by a tape-shaped band. A lead acid battery characterized in that the group is fixed to a battery case.