JPH0122707B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing a lead-acid battery using an expanded grid.

Conventional configurations and their problems Conventionally, electrode plates using expanded grids can be operated continuously and have better properties than electrode plates using cast grids. As shown in FIG. 1, the conventional continuous cutting and forming method for such an expanded lattice involves cutting a central band-shaped unprocessed part 1, bridge pieces 3 connecting mesh lattice parts 2 on both sides, and poles. The pole piece 4 was punched and cut into a predetermined shape, leaving the pole piece 4 connected to the piece 3.

Therefore, when manufacturing the electrode plate pair, the remaining parts 5a, 5b, 5 except the bridge piece 3 corresponding to the ear part connecting the mesh-processed parts and the pole piece 4 which is integrally connected to the bridge piece 3 are removed.
c had become a scrap.

Further, the conventional electrode plate group was composed of one positive electrode plate 7 manufactured using a cast grid, one negative electrode plate pair 6, and a separator 8, as shown in FIG. Here, the negative electrode plate pair 6 is the first
After applying a paste active material to the continuous band-shaped expanded lattice shown in the figure, the bridge pieces 3 connecting the mesh lattice parts 2 on both sides of the unprocessed part 1 and the 4 parts of the pole pieces 3 connected to the pole pieces 3 are left unprocessed. Part 1 is punched and cut into a predetermined shape, and the bridge piece 3 is cut out as shown in Fig. 2.
The pole piece 4 was bent so that the mesh lattice parts faced each other, and the pole piece 4 was oriented so as to protrude above the pair of pole plates 6 by bending.

However, in a conventional lead-acid battery in which a group of electrode plates having the above structure is housed in a battery case, it is necessary to provide slits at the top and bottom of the pole piece 4 as shown in FIG. Because the surface area is smaller, the strength is weaker and the battery may fall,
When a storage battery is subjected to vibrations, the electrode plates may move within the battery case, causing battery terminals to short-circuit, and when a large current is discharged, the pole pieces may melt.

Further, since the slits are provided at the top and bottom of the pole piece 4, there is a drawback that the number of scratches increases.

Purpose of the Invention The present invention solves the above-mentioned drawbacks in a method for manufacturing lead-acid batteries using such an expanded grid, improves the material yield, and prevents the movement of the electrode plate group within the battery case and the problem of the pole pieces. The purpose of this is to prevent melting and to improve economic efficiency and reliability.

Structure of the Invention In order to achieve the above object, the method for manufacturing a lead-acid battery of the present invention is to provide a strip-shaped thin plate made of lead or a lead alloy with a strip-shaped unprocessed portion 1 in the center and mesh lattice portions 2 on both sides thereof. Next, the mesh lattice part 2 is formed with an electrode plate part, the non-processed part 1 is formed with a bridge piece 3 and a pole piece 4 connected to the bridge piece 3, and then the The bridge piece 3 connects the pole plate parts on both sides of the non-processed part 1, and the pole piece 4
The intermediate part of the base 4d is connected to the bridge piece 3, and the base 4d is connected to the bridge piece 3.
d First cuts 4e, 4 between both ends and the bridge piece 3
f is formed, and a second notch 4b is formed in the longitudinal direction of the center.Next, the bridge piece 3 is bent and the electrode plate parts are made to correspond in parallel to form the electrode plate pair 6. Next, the pole piece 4 is bent upward along the first notches 4e and 4f of the base 4d to protrude, and then bent at the second notch 4b in the center to form two pieces, with the lower part shaped into a triangular shape. It is characterized by its shape.

As shown in FIG. 3, the scratches generated during the manufacture of the electrode pairs in the lead-acid battery manufacturing method of the present invention are integrated with the bridge piece 3 and the pole piece 3, which correspond to the ears connecting the mesh parts 2. There is only the remaining part 5 after removing the continuous pole piece 4, and the number can be reduced by the amount of slits provided above and below the conventional pole piece.

DESCRIPTION OF EMBODIMENTS Hereinafter, a specific example of forming a plate group using a plate pair obtained by the manufacturing method of the present invention will be described with reference to the drawings. The electrode plate group in FIG. 6 includes one positive electrode plate 7 made of a cast grid and the aforementioned negative electrode plate pair 6.
and a separator 8. The negative electrode plate pair 6 is formed by applying a paste active material to the continuous band-shaped expanded lattice shown in FIG. A portion of the pole piece 4 parallel to the processed part 1 is punched and cut, and long cuts 4a and 4c are made in the upper and lower sides of the pole piece 4, and a cut 4b shorter than the cuts 4a and 4c is formed in the center part.
Furthermore, short cuts 4e and 4f are made at the top and bottom of the base 4d that connects to the bridge piece 3, respectively.

The negative electrode pair 6 is bent so that the mesh lattice portions 2 face each other at the bridge piece 3 portion, and then the pole piece 4 is bent from its base 4d to project above the electrode plate pair 6.

Furthermore, the 2 parts are divided by the notch 4b in the center.
By bending the pole piece 4 in the direction of the arrow in FIG. 4 using the notch 4b as a fulcrum, the two symmetrical pole pieces overlap and the lower part of the pole piece 4 forms the notch 4e, as shown in FIG. The 4f portion moves to form a triangular shape.

Comparing the electrode plate group of this embodiment and the conventional electrode plate group, it is found that the lead-acid battery equipped with the conventional electrode plate group has a single pole piece and is therefore weak in strength. There were problems such as the group moving in the battery case due to vibrations, etc., and the pole pieces melting down when discharging at a large current, but in the present invention, the pole pieces are stacked in two layers, and
By forming the lower part of the pole piece into a triangular shape, the strength is improved and it is possible to prevent the pole plate group from moving within the battery case due to vibration or the like. In addition, since the surface area of the pole piece is large, it is possible to prevent the pole piece from fusing out during large current discharge, and furthermore, the scratch loss due to cutting can be reduced compared to the conventional case.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) By stacking two pole pieces and making the lower part of the pole piece triangular, the strength is improved and movement of the pole plate group within the battery case due to vibration etc. can be prevented.

(2) Since the surface area of the pole piece is large, it is possible to prevent the pole piece from fusing when a large current is discharged due to a short circuit or the like.

(3) Scrap loss during the manufacture of expanded lattices can be reduced.

By improving the material yield and providing an advantageous structure in terms of strength and current capacity, it is possible to improve the economic efficiency and reliability of the storage battery.

[Brief explanation of drawings]

Figure 1 is a top view of a conventional expanded lattice formed by punching, and Figure 2 is a perspective view before assembling an electrode plate group using a pair of electrode plates made by folding the same punched lattice so that the lattice portions face each other in parallel. Figures 3 and 3 are top views of the punched and formed expanded lattice according to the embodiment of the present invention, Figures 4 and 5 are perspective views showing the process of bending the homopolar column pieces, and Figure 6 is a group of homopolar plates. FIG. 2 is a perspective view before assembly. 1... Unprocessed part, 2... Mesh lattice part, 3... Bridge piece, 4... Pole column piece, 4a, 4b, 4c... Notch, 4d... Base, 4e, 4f... Notch, 6...
...Negative electrode plate pair.

Claims (1)

[Scope of Claims] 1. A strip-shaped thin plate made of lead or lead alloy is formed with a strip-shaped unprocessed portion 1 in the center and mesh lattice portions 2 on both sides thereof by expanding processing, and then the mesh lattice portions are expanded. 2, a pole plate part is punched out, and the non-processed part 1 is punched with a bridge piece 3 and a pole piece 4 connected to the bridge piece 3, and the bridge piece 3 is formed by punching the poles on both sides of the non-processed part 1. It connects the plate parts,
The pole piece 4 has a base 4d whose middle part is connected to the bridge piece 3, first cuts 4e and 4f are formed between both ends of the base 4d and the bridge piece 3, and a second cut 4.
b is formed in the longitudinal direction of the center, and then the bridge piece 3 is bent and the pole plate parts are made to correspond in parallel to form a pair of pole plates 6, and then the pole piece 4 is bent upward along the first cuts 4e, 4f of the base 4d to protrude,
A method for manufacturing a lead-acid battery in which the lower part is made into a triangular shape by bending the two sheets at the second notch 4b in the center.