JPH0514461Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a long-life paste type lead-acid battery for cycle service use.

[Problems to be solved by conventional technology and ideas] Conventionally, in paste type lead-acid batteries, a glass mat was applied to the positive electrode plate and pressure was applied to the electrode plate group to prevent the positive electrode active material from falling off the lattice. We are trying to suppress this and achieve a long lifespan. but,
In reality, the electrode plates consisting of positive and negative electrode plates, separators, and glass mats are used in a resin battery case, so there is a limit to the pressure resistance of the battery case, and sufficient pressure cannot be applied. Even if the strength of the battery case was improved through metal reinforcement, etc., there were problems with workability when inserting the high compression electrode group into the battery case.

Conventionally, as a method to solve the above-mentioned problems, it has been proposed to place compression plates at both ends of the electrode plate group, tighten them with bands to achieve a predetermined degree of compression, and then insert the electrode plate group into the battery case. . However, with such a structure, when tightening the electrode plate group with the band, it was necessary to adjust the tension of the band to a force corresponding to the compression force of the electrode plate group, but the compression force of the electrode plate group is Compared to the wet state due to liquid injection, the amount is reduced by half. Therefore, as the electrode plate group gets wet, the tension of the band will overcome the compressive force of the electrode plate group, and the length of the electrode plate group will change in the direction of becoming shorter.
This will cause the electrode plates to wobble inside the battery case. This also caused problems such as vibrations causing the electrode plate group to move, resulting in damage to the welded portion between the pole pole and the strap or breakage of the pole pole.

[Means for solving the problems] The present invention provides a lead-acid battery having a structure that can solve the above-mentioned problems, and for this purpose, the present invention replaces paste-type positive and negative electrode plates, separators, and glass mats. A structure in which acid-resistant and rigid compression plates are arranged at both ends of an electrode plate group, and the electrode plate group is tightened with a band and held at a predetermined degree of compression and inserted into a battery case. A rod-shaped body is integrally provided to regulate the dimensions of the electrode plate group to prevent the length of the electrode plate group from becoming short even if the electrode plate group gets wet.

[Examples] Hereinafter, the lead-acid battery of the present invention will be specifically described with reference to the drawings.

Figure 1 shows an example of the structure of the electrode plate group used in the lead-acid battery of the present invention, in which 1 is a plate group consisting of a combination of paste type positive and negative electrode plates, separators and glass mats, 2 and 2' are electrode plates. These are acid-resistant and rigid compression plates arranged at both ends of the plate group 1, and have a shape as shown in FIG. 2. The compression plates 2 and 2' are made of resin plates such as hard vinyl chloride, polycarbonate, or ABS resin, or aluminum plates or iron plates coated with resin. Reference numeral 3 denotes a rod-shaped body provided integrally with one compression plate 2, and the tip of the rod-shaped body 3 is adapted to touch the compression degree 2' of the other. Further, the length of the rod-shaped body 3 is made slightly shorter than the length of the electrode plate group 1 when the electrode plate group 1 is held at a predetermined degree of compression. Reference numeral 4 denotes a resin band made of polypropylene or the like, which tightens the electrode plate group 1 to a predetermined degree of compression with compression plates 2, 2' applied to both ends thereof. Reference numeral 5 denotes a joint portion of the band 4, which is fixed by heat welding or the like. Note that the work of tightening the electrode plate group 1 with the band 4 may be performed either before or after the electrode plate group 1 is welded. In addition to the band 4 made of resin, a band made of acid-resistant metal such as stainless steel may be used. When a resin band is used, a packaging machine can be used as is, so there is an advantage that the band can be tightened with a simple operation using general-purpose equipment. Furthermore, the method of the present invention for banding the electrode plate group has the advantage that the electrode plate group can be easily carried even when a large-capacity battery is produced. 6 is a groove formed on the side surface of the compression plates 2, 2';
The band 4 is adapted to fit into the groove 6.
Furthermore, the depth of the groove 6 is set to correspond to the thickness of the band 4, so that when the band 4 is tightened on the electrode plate group 1, the band 4 does not protrude from the side surface of the compression plates 2, 2'. Never. Note that the groove 6 may be formed in all of the portions of the compression plates 2, 2' that come into contact with the band 4.

As mentioned above, in the embodiment of the present invention, since the compression plate 2 is formed with the rod-shaped body 3 that regulates the dimensions of the electrode plate group 1, the balance between the compression force of the electrode plate group 1 and the tension of the band 4 is considered. It is possible to increase the tension of the band 4 without causing any trouble, and therefore the tightening work using the band 4 becomes easy. Furthermore, even if the plate group 1 gets wet due to liquid injection and tries to change in the direction of shortening the length of the plate group 1, the rod-shaped body 3 restricts the change, and as a result, the plate group 1 becomes shorter and the battery case becomes shorter. There is no possibility of rattling of the electrode plate group 1 inside. Furthermore, since movement of the electrode plate group 1 due to vibration can be prevented, damage to the welded portion between the pole pole and the strap or breakage of the pole pole due to vibration can also be prevented.

Furthermore, in the embodiment of the present invention, since the compression plates 2, 2' are formed with the grooves 6 into which the band 4 is inserted, the width of the compression plates 2, 2' can be made as large as the inside dimensions of the battery case. Even in this manner, the work of inserting the electrode plate group 1 into the battery case can be easily performed. Furthermore, since a sufficient gap can be provided between the band 4 and the electrode plate group 1, side short circuits can be more reliably prevented, and the movement of the electrode plate group 1 due to vibration can be prevented by the pressure plates 2, 2'. This can be prevented to some extent, so
It is also possible to prevent damage to the welded part between the pole pole and strap or breakage of the pole pole due to vibration.

[Effects of the invention] As described above, according to the invention, there is no possibility that the length of the electrode plate group changes due to the column liquid and causes rattling of the electrode plate group in the battery case, thereby reducing vibration. This is a long-life lead-acid battery that maintains the electrode group at a predetermined degree of compression, and has excellent advantages such as preventing the movement of the electrode group due to can be provided.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the electrode plate group used in the lead-acid battery of the present invention, and FIG. 2 is an enlarged perspective view of the compression plate in the embodiment of the present invention shown in FIG. 1... Electrode plate group, 2, 2'... Compression plate, 3... Rod-shaped body, 4... Band.

Claims (1)

[Scope of utility model registration request] Acid-resistant and rigid compression plates are placed on both ends of the electrode plate group consisting of paste-type positive and negative electrode plates, separators, and glass mats, and the electrode plate group is tightened with a band to maintain the specified degree of compression and inserted into the battery case. What is claimed is: 1. A lead-acid battery having a structure comprising: a rod-shaped body for regulating the size of the electrode plate group;