JPH0422544Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to improvement of lead-acid batteries.
In lead-acid batteries, the positive electrode plate undergoes elongation and deformation during use, but the present invention relates to absorbing this elongation deformation in the positive electrode plate itself.

In the internal structure of a lead-acid battery, the positive electrode plate is generally held by a hanging method in which the hanging ears provided on the top or side of the positive electrode plate are supported by the lid or the side of the battery case, and a hanging method in which the positive electrode plate foot is There are two types of support methods: one is placed on a rack installed at the bottom of the tank.

In the former method, the distance between the bottom of the battery case and the bottom of the positive electrode plate is set appropriately according to the amount of elongation and deformation of the positive electrode plate, so that even if the positive electrode plate stretches and deforms, it does not affect the sealing part of the storage battery. . However, for this purpose, a suspension part must be provided on the side wall of the battery case, and a similar one must be provided for the lid. Furthermore, the positive electrode plate also requires a hanging ear, which results in a complicated structure, resulting in an increase in production man-hours and waste of materials. In addition, insulation treatment with the negative electrode plate may be necessary, which increases the complexity of the structure and also reduces reliability.

On the other hand, the latter method is structurally simple, and the shape of the container, lid, and positive electrode plate is simple because the foot of the positive electrode plate is supported by the collar of the container. However, the disadvantage of this method is that if there is no countermeasure against the positive electrode plate being stretched and deformed while the battery is in use, the force of the positive electrode plate stretching will act on the sealing part of the battery case and lid, causing damage to the sealing part, or in extreme cases. may cause damage to the lid.

The present invention adopts the latter method, but also takes measures to absorb elongation deformation. In other words, a recess is provided in the foot of the positive electrode plate for burying the shell of the battery case, and the positive electrode plate is placed above the shell. An electrode plate support made of a pole or the like is provided in the recess to support the electrode plate, and the mechanical stress required to bury the electrode plate in the recess is reduced by the force that extends during use of the positive electrode plate and the sealing part of the storage battery case and lid. To provide a lead-acid battery having a structure in which the bonding force is weaker than that of the battery case, and the collar part of the battery case is buried in the recessed part of the foot part of the positive electrode plate in proportion to the elongation dimension of the positive electrode plate.

Hereinafter, the present invention will be specifically explained using embodiments shown in the drawings.

FIG. 1 shows an example of the shape of the positive electrode plate used in the storage battery of the present invention and the state of support to the bottom of the battery case, in which a is a front view, b is a side view, and c is a bottom view. In the figure, 1 is a positive electrode plate, 2 is a foot part, 3 is a crosspiece forming the foot part 2, 4 is a recess provided in the foot part 2, and 5 is a collar at the bottom of the battery case. The crosspiece 3 is provided at the entrance of the recess 4 and serves as an electrode plate support for placing and supporting the positive electrode plate on the rack. The foot portion 2 has a lattice shape whose mechanical strength is weaker than the elongation force of the positive electrode plate 1 and the bonding force of the storage battery sealing portion, and the crosspiece 3 of the foot portion 2 is caused to crack 5 by the vertical elongation deformation force of the positive electrode plate 1. The structure is such that the positive electrode plate 1 absorbs the elongation of the positive electrode plate 1 by bending the positive electrode plate 1 and embedding it in the recess 4. In addition, the mechanical stress required to bury the cradle 5 in the recess 4 of the foot part 2 can be easily reduced by changing the thickness of the pier 3 or by making a cut in the pier 3 as shown in the figure. It can be made weaker than the elongation deformation force of the plate 1, etc. Figures 2 and 3 show an embodiment of the lead-acid battery of the present invention using a positive plate as shown in Figure 1. Figure 2 shows the initial stage of use of the lead-acid battery; It is placed and supported on the crane by the crosspieces at the top. Figure 3 shows how the positive electrode plate expands during long-term use and absorbs the elongation at the crack part.
The crosspiece supports the positive electrode plate in a divided and deformed state. In the drawings, the same reference numerals as in FIG. 1 indicate the same operating members. As can be seen from FIGS. 2 and 3, when the positive electrode plate 1 is stretched and deformed during long-term use, the crosspiece 3 of the foot 2 is bent or folded by the clamp 5 due to the stretching and deforming force. , Kula 5
is buried in the recess 4 of the foot portion 2 in proportion to the amount of elongation deformation of the positive electrode plate 1, absorbing the elongation of the positive electrode plate 1.

In this way, in the embodiment of the present invention, the elongation of the positive electrode plate can be absorbed by the positive electrode plate foot, and the structure is simple, and the positive electrode plate foot is integrated with the lattice during casting of the positive electrode lattice, as in the conventional case. Since it can be cast into
It has the advantages of not affecting productivity, not destroying the sealing part of the storage battery or damaging the lid, and having high reliability during long-term use.

Figure 4 shows another embodiment of the positive electrode plate used in the lead-acid battery of the present invention, in which a is a front view, b is a side view, and c is a side view.
is a bottom view. In the figure, the same reference numerals as in FIG. By making the positive electrode plate 1 thin, the thin film part 6 of the foot part 2 is deformed or damaged by the crack of the battery case, and the battery case is buried in the recess and the positive electrode is damaged. The structure is such that it can absorb the elongation of the board.

As mentioned above, the lead-acid battery of the present invention can absorb the elongation of the positive electrode plate during battery use at the foot of the positive electrode plate, thereby preventing damage to the sealing part of the battery and damage to the lid, etc. It has excellent advantages such as simple structure, no effect on productivity, and high reliability during long-term use.

[Brief explanation of the drawing]

Figure 1 shows an embodiment of the positive electrode plate used in the lead-acid battery of the present invention, in which a is a front view, b is a side view,
c is a bottom view, FIGS. 2 and 3 are longitudinal sectional views showing one embodiment of the lead-acid battery of the present invention, and FIG. 4 is a diagram showing another embodiment of the positive electrode plate used in the lead-acid battery of the present invention.
A is a front view, b is a side view, and c is a bottom view. 1... Positive electrode plate, 2... Foot section, 3... Crosspiece, 5...
Part 6 of the battery case...thin film-like part.

Claims (1)

[Scope of utility model registration request] A recess is provided in the foot of the positive electrode plate to bury the collar of the battery case, and the positive electrode plate is supported on the collar and deformed by an external force, so that the collar of the battery case is inserted into the recess in proportion to the elongation dimension of the positive plate. A lead-acid battery comprising a plate support having a structure in which the electrode plate supports are buried in the recess.