JPH0935740A - Lead-acid battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a ridge arranged in a battery container bottom in order to ensure a space for accumulating a fallen off active material in a battery container bottom unnecessary, and prevent partial accumulation of the fallen off active material in a specific position in a clad type lead-acid battery. SOLUTION: A foot part 11 protruded downward and a projection 12 projecting from the electrode plate surface are discontinuously formed in a lower insulating continuous seating 10 for insulating the lower part of a clad type cathode plate 4. An electrode group is constituted by placing the lower part of a paste type anode plate 3 on the projection 12 for supporting, and housed in a battery container 2 to assemble a lead-acid battery. A space is ensured between the lower part of the electrode plate group and the bottom of the battery container. For example, the foot 11 and the projection 12 are separately arranged in two portions in the lower insulating continuous seating 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead-acid battery (clad-type lead-acid battery) in which an electrode group formed by stacking a paste-type cathode plate and a clad-type anode plate via a separator is housed in a battery case. Is.

[0002]

2. Description of the Related Art A clad lead-acid battery is detached from an electrode plate in order to prevent a short circuit between the cathode plate and the anode plate due to an active material that is detached from the cathode plate or the anode plate during use of the battery. A structure is adopted in which the active material is deposited on the bottom of the battery case. For example, as shown in FIG. 4, a separately prepared synthetic resin lattice-shaped saddle 1 is arranged at the bottom of the battery case 2, and the saddle 1
The structure is such that the paste type cathode plate 3 and the clad type anode plate 4 are supported on the above, and a space under which the dropped active material is deposited is secured. In addition, as shown in FIG.
The paste type cathode plate 3 and the clad type anode plate 4 are supported on an integrally formed saddle 5 integrally formed on the bottom of the above, and a space under which the dropped active material is deposited is secured.

[0003]

In the structure shown in FIG. 4, it is necessary to prepare a grid-shaped saddle having a size suitable for each size of various battery cases. On the other hand, in the structure shown in FIG. 5, since the integrally molded saddle directly projects from the bottom of the battery case and is continuous for a certain length, there is a space at the bottom of the battery case for depositing the fallen active material. It is divided into several blocks. Therefore, the active material deposited on one block does not easily move to another block, and if the active material is deviated on a specific block, a short circuit occurs earlier in that block. The problem to be solved by the present invention is to eliminate the need for a saddle arranged at the bottom of the battery case in order to secure a space for depositing the dropped active material on the bottom of the battery case, and It is not to be biased to a specific place.

[0004]

In order to solve the above problems, in a lead acid battery according to the present invention, an electrode group formed by stacking a paste type cathode plate and a clad type anode plate via a separator is used as a battery case. In the case where the clad-type anode plate is housed, the lower insulating coupling of the clad-type anode plate is discontinuously provided with a foot protruding downward and a protrusion protruding in a direction protruding from the plate surface. The lower portion of the paste type cathode plate is supported on the protrusion. In the above-mentioned structure, the leg portion projecting downward from the lower insulating bearing secures a space between the lower portion of the clad anode plate and the bottom of the battery case. Also, a space is secured between the lower portion of the paste type cathode plate supported on the protrusion and the bottom of the battery case. That is, the space for accumulating the fallen active material is secured between the lower part of the electrode plate group and the bottom of the battery case. Since the legs and the protrusions are discontinuously provided, the space formed in the bottom of the battery case is not divided into blocks, and the active material deposited here freely moves in the space at the bottom of the battery case. Since it can be moved, the accumulation of the active material does not deviate to a specific place.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1, in order to insulate the lower part of a clad type anode plate 4, a lower part bearing 1 made of synthetic resin is used.
0 is provided by injection molding. At this time, the foot portion 11 that protrudes downward from the lower insulating bearing 10 and the protrusion portion 12 that projects from the electrode plate surface are discontinuously provided together.
The paste type cathode plate 3 and the clad type anode plate 4 are overlapped with the separator 6 interposed therebetween to form an electrode plate group. The lower part of the paste type cathode plate 3 is placed on and supported by the protrusion 12.
The electrode group is housed in the battery case 2 to assemble a lead storage battery. The above-mentioned "discontinuously provided" includes a case where one foot portion 11 and a protrusion portion 12 are provided in the lower insulating communication seat 10 and a case where a plurality of them are provided, respectively. , Means that there is a space between adjacent protrusions.

[0006]

EXAMPLE As shown in FIGS. 2 and 3, a lower insulating bearing 10 is used.
Two foot portions 11 projecting downward from are provided. Also,
Since the paste type cathode plates 3 are arranged on both sides of the clad type anode plate 4, two protrusions 12 are provided on both sides of the lower insulating spacer 10. As shown in FIG. 3, the protrusion 1
Since the position where 2 is provided is shifted to the opposite side in the width direction of the electrode plate on both sides of the lower insulating spacer 10, when the paste type cathode plate 3 is placed and supported on the protrusion 12, the lower insulating spacer 10 is provided.
Bears the load of the paste type cathode plate uniformly as a whole.

[0007]

As described above, in the lead acid battery according to the present invention, the saddle is arranged at the bottom of the battery case due to the presence of the foot portion and the projection portion which are discontinuously provided on the lower insulating bearing of the clad type anode plate. Instead, it is possible to secure a space between the lower part of the electrode plate group and the bottom of the battery case, where the fall-off active material is deposited. Since the active material deposited in this space can move freely in the space, it does not accumulate at a specific location in a biased manner, and short-circuiting occurs early due to the biased deposition in a specific location. Nor.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of a lead storage battery according to the present invention.

FIG. 2 is a perspective view showing an example of a clad type anode plate in a lead storage battery according to the present invention.

FIG. 3 is a bottom view of a clad type anode plate in the lead storage battery according to the present invention.

FIG. 4 is a sectional view of a main part of a conventional lead storage battery, and FIG. 4B is a sectional view taken along the line AA ′ of FIG.

FIG. 5 is a sectional view of a main part of a conventional lead storage battery, and FIG. 5B is a sectional view taken along line BB ′ of FIG.

[Explanation of symbols] 2 is a battery case 3 is a paste type cathode plate 4 is a clad type anode plate 6 is a separator 10 is a lower insulating bearing 11 is a foot 12 is a protrusion

Claims (1)

[Claims] 1. A lead storage battery in which an electrode group constituted by stacking a paste type cathode plate and a clad type anode plate with a separator in between is housed in a battery case. A lead-acid battery, characterized in that a foot portion protruding inwardly and a protrusion in a direction projecting from the electrode plate surface are discontinuously provided, and a lower portion of the paste type cathode plate is supported on the protrusion.