JPH0753253Y2 - Multi-piece electrode plate assembly for lead-acid battery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a multi-piece electrode plate assembly manufactured in the process of manufacturing a lead storage battery electrode plate.

[Prior Art] In order to improve the manufacturing efficiency of a lead plate of a lead storage battery, a grid connection body having a structure in which current collector grids for a plurality of electrode plates are connected to each other by a connection portion is cast, and the grid connection body is formed. It has been practiced to fill a plurality of current collector grids with the active material at once. In the present specification, the one in which each current collector grid of the grid-connected body is filled with the active material is referred to as a multi-piece electrode plate assembly for a lead storage battery (hereinafter also simply referred to as an electrode plate assembly). .

FIG. 4 shows a conventional electrode plate assembly 1. The electrode plate assembly of this example has a rectangular outer skeleton (a portion forming an outer frame).
From the grid connection body 4 having a structure in which nine current collector grids G1 to G9 each having the above are arranged in 3 rows and 3 columns and connected by the connecting portions 2 and 3, and the active material 5 filled in each current collector grid. Therefore, the current collector grids G1 to G9 and the active material 5 filled in the grids form the lead acid battery electrode plates P1 to P9.

The grid connection body 4 has a substantially rectangular contour shape having outermost straight line portions 6 on the outermost edges of the four sides, and the end portions of the current collector grids G1 and G3 of the grid connection body 4 have poles in the manufacturing line. A pair of plate-shaped projections used for holding the plate assembly on a conveyor or the like, or for adsorbing the electrode plate assembly by vacuum suction means.
7,7 are provided.

The above electrode plate assembly 1 is set in the cutting device after the drying process of the active material. In the cutting device, the electrode plate assembly 1
The electrode plate assembly 1 is positioned by abutting the outermost linear portion 6 of (1) as a reference (positioning reference) and contacting the linear portion 6 with the positioning means. Then, the connecting parts 2 and 3 are cut along a cutting line 8-8 shown in the drawing with a cutter such as a tip saw or a slitter to separate the electrode plates P1 to P9. Further, the projections 7 are cut off from the current collector grids G1 and G3 of the electrode plates P1 and P3. Each divided connecting portion 3 becomes an ear portion of each electrode plate. In FIG. 4, reference numeral 9 indicates a positioning surface that abuts the outermost straight line portion 6 of the electrode plate assembly 1.

[Problems to be Solved by the Invention] Since it is unavoidable that a casting burr is generated on the outermost straight portion 6 of the cast grid connector 4, the grid connector 4 has the above-mentioned structure.
When the electrode plates were separated based on the outermost straight line portion 6 of No. 3, it was unavoidable that a relatively large dimensional error of about 1 mm occurred. In order to secure the mechanical strength of each current collector grid, it is sufficient if the width w of the outer skeleton forming the outer frame of each current collector grid is about 1 to 1.5 mm. Since a large dimensional error (about 1 mm) occurs when the electrode plate is separated, it was necessary to set the width w of the external bone part to a considerably large value (about 2 mm).

As described above, in the conventional electrode plate, since it was necessary to set the width dimension of the outer skeleton portion of the current collector grid to be large, when the outer frame dimensions of the current collector grid are the same, the active material that can be filled in the grid is There was a problem that the amount was limited.

An object of the present invention is to provide a multi-piece electrode plate assembly for a lead storage battery, which solves the above problems by improving the dimensional accuracy when separating the electrode plates.

[Means for Solving the Problems] The present invention includes a grid connection body that is cast in a state in which current collector grids for a plurality of electrode plates are connected to each other by a connection portion. The present invention relates to a multi-piece electrode plate assembly for a lead storage battery in which a plurality of current collector grids are filled with active materials to form a lead storage battery electrode plate.

In the present invention, through holes are formed at least at two places in the grid connecting body so as to penetrate the grid connecting body in the thickness direction, and the through holes are positioned with respect to the cutting device when the electrode plates are separated. The means for inserting is used as a hole for inserting.

The above through holes may be provided in the ears or the like of the grid-connected body, but if the through holes are provided in the ears and the like, the mechanical strength may be impaired. In order to prevent the mechanical strength of the current collector grid from being impaired, it is preferable to provide a plate-like portion in a part of the grid connection body and to penetrate the plate-like portion to provide the through hole.
In this case, each plate-like portion is provided so as to project into the gap between the current collector grids, or is provided inside the outer skeleton of the current collector grid (a portion embedded in the active material). Is preferred.

[Operation] When the grid connecting body is provided with the through holes as described above and the positioning means is inserted into the through holes so that the electrode plate assembly can be positioned, there is no burr in the through holes. Therefore, it is possible to improve the positioning accuracy of the electrode plate assembly and the dimensional accuracy when separating the electrode plates. Therefore, the width dimension of the outer bone of each current collector grid can be set smaller than the conventional one, and the amount of the active material can be increased to increase the capacity of the battery.

Further, as described above, when the plate-like portion is provided on the grid-connected body and the through-hole is provided by penetrating the plate-like portion, the mechanical strength of the electrode plate is not impaired.

Embodiments Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of the present invention, in which the same parts as those of FIG. 4 are designated by the same reference numerals. In the present embodiment, each of the current collector grids G1 to G9 has a portion between the outer bone portion (the rectangular bone portion forming the outer frame portion of each current collector lattice) and the base portion of the connecting portion 3. A plate-shaped portion 11 is provided so as to protrude into a gap between adjacent current collector grids, and a through hole 12 is formed by penetrating each plate-shaped portion 11 in the thickness direction.

Further, in this example, plate-like portions (not shown) similar to the plate-like portion 11 are provided inside the outer skeleton of the current collector lattice located at both ends in the width direction of the lattice connected body 4, and Through hole 13 in plate
Is provided. The through hole 13 is embedded in the active material 5 when the active material 5 is filled.

Other points are the same as those of the conventional electrode plate assembly shown in FIG.

FIG. 2 shows a cross section of a main part of a mold used for casting the above-mentioned electrode plate assembly 1, in which 15 is a first mold and 16 is a second mold. Reference numeral 17 denotes a casting part (a space in the mold) for molding the plate-shaped part 11 having a through hole, which is the first mold.
A through-hole forming pin 18 that projects into the casting portion is provided in the casting 15.

The through-hole forming pin 18 is fitted into the pin fitting hole 19 provided in the second mold 16 across the casting part 17 when the first and second molds 15 and 16 are combined. .

By providing the through-hole forming pin 18 as described above in the mold for casting the grid connected body to form each through-hole, it is possible to prevent burrs from being formed on the inner peripheral side of the through-hole 12 or 13. it can.

It is also possible to form each through hole by punching after casting the grid connection body, but in this case as well, burrs do not occur on the inner peripheral side of each through hole.

As described above, the through holes 12 and 13 in which there is no possibility of burrs on the inside are provided as a collision for positioning the electrode plate assembly, and positioning means such as pins are inserted into these through holes to install the electrode plate assembly. When the body 1 is positioned with respect to the cutter of the cutting device (a tip saw, a slitter, or the like), the positioning accuracy of the electrode plate assembly 1 can be increased, and the dimensional accuracy of the separated electrode plate can be increased to stabilize the quality. Can be realized.

Further, since the dimensional accuracy of the separated electrode plates can be improved, the width dimension of the outer skeleton portion of the grid of each electrode plate can be set to the necessary minimum, and the amount of the active material can be increased.

In the above-described embodiment, since the through hole 13 is embedded in the active material, when positioning the electrode plate assembly by using this through hole 13, the active material is penetrated into the through hole 13. Align the positioning means with.

FIG. 3 shows another embodiment of the present invention. In this example, a plurality of plate-shaped portions 20 are provided so as to project outward from the outer edge of the electrode plate assembly 1, and each plate-shaped portion 20 is provided. A through hole 21 is provided in. Further, in this example, each projection 7 is provided with a through hole 22.

Even when the through holes are provided in this manner, the positioning accuracy of the electrode plate assembly 1 can be improved.

In addition, in the above-described electrode plate assembly production line, when the cast grid connection body 4 is sent to the active material filling machine, the vicinity of the bases of the projections 7 and 7 are sucked by suction means to form the grid connection body. May be sent to the filling machine one by one, but in this case, the protrusion
It is better to avoid providing the through holes 22 in 7 and 7.

Further, when a series of grid-connected bodies are arranged on a conveyor and filled with an active material, the plate-shaped portion 20 protruding outward as shown in FIG.
Since the plate-shaped portion 20 cannot prevent the formation of a gap between a series of grid-connected bodies, the gap is filled with an extra active material, and the active material is wasted. Occurs. Further, when the plate-shaped portion 20 projects outward, the plate-shaped portion becomes an obstacle when forming a battery.
A step of cutting 20 along the cutting line 8-8 is required,
The man-hour of the cutting process increases.

For these reasons, it is preferable that the plate-like portion forming the through-hole is provided so as not to project outward as much as possible, as in the embodiment shown in FIG.

Experiments have revealed that if the through holes are provided to improve the positioning accuracy of the electrode plate assembly as in the present invention, the dimensional accuracy of the separated electrode plate can be kept within ± 0.2 mm.
As a result, the width dimension w of the outer bone of the collector grid can be set to the minimum required size (1 to 1.5 mm). As a result, the amount of the active material can be increased by 5 to 8% and the capacity can be increased by 5 to 8% as compared with the conventional one in which the size of the current collector grid is the same.
Could be increased.

In the above embodiment, the plate-like portions are provided on all the current collector grids and the through-holes are provided in each plate-like portion, but at least two through-holes may be provided as the whole electrode plate assembly.

Further, in the embodiment of FIG. 1, two types of through holes are provided: a through hole 12 provided in the plate-like portion 11 protruding from the outer bone and a through hole 13 embedded in the active material. Only one of the through holes may be provided.

In the above-mentioned embodiment, the nine electrode plate assembly is taken as an example, but the number of electrode plates included in the electrode plate assembly is arbitrary.

[Advantages of the Invention] As described above, according to the present invention, a through hole having no possibility of burrs being present inside is provided in the grid connecting body, and the positioning means is inserted into the through hole to thereby polar plate assembly. Since it is possible to position the electrodes, it is possible to improve the positioning accuracy of the electrode plate assembly and the dimensional accuracy when the electrode plates are separated.

Therefore, the width of the outer bone of each current collector grid can be set smaller than in the conventional case, and the amount of the active material can be increased to increase the capacity of the battery.

Further, according to the invention as set forth in claim 2 or 3, since the plate-like portion is provided in the grid connection body and the through-hole is provided through the plate-like portion, the mechanical strength of the electrode plate is not impaired at all. The dimensional accuracy of the electrode plate can be improved.

Further, according to the invention as claimed in claim 2 or 3, it is not necessary to provide a plate-shaped portion at a position which does not disturb the construction of the battery, and to eliminate the step of cutting the plate-shaped portion. It is possible to prevent the number of plate manufacturing steps from increasing.

[Brief description of drawings]

FIG. 1 is a front vertical sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view showing an essential part of a mold used for casting a grid connection body in the same embodiment, and FIG. 3 is a view of the present invention. FIG. 4 is a front view showing another embodiment, and FIG. 4 is a front vertical sectional view showing a conventional electrode plate assembly. 1 ... Multi-piece electrode plate assembly for lead-acid battery, 2,3 ... Connection part, 4 ... Lattice connection part, 5 ... Active material, 11,20 ... Plate part, 12, 13, 21, 22 …… Through hole, G1 to G9 …… Current collector grid, P
1 to P9 ... Pole plate for lead acid battery.

Claims (3)

[Scope of utility model registration request] 1. A grid connection body, which is cast in a state where current collector grids for a plurality of electrode plates are connected to each other by a connection portion, the grid connection body being active in each of the plurality of current collection grids. In a multi-piece lead-acid battery electrode assembly for a lead-acid battery, in which a lead-acid battery electrode plate is filled with a substance, through-holes penetrating the grid-connected body in the thickness direction are provided in at least two positions of the grid-connected body. The through-hole is provided and is used as a hole for inserting a means for positioning the assembly with respect to the cutting device when separating the respective electrode plates. . 2. The through hole is formed by penetrating a plate-shaped portion provided so as to project into a gap between the plurality of current collector grids. A multi-piece electrode plate assembly for lead acid batteries. 3. The grid connecting body has a plate-shaped portion located inside an outer skeleton portion of the current collector grid, and the through-hole is provided in the plate-shaped portion. A multi-piece electrode plate assembly for a lead storage battery according to claim 1.