JPS5831704B2 - Grid for lead-acid batteries - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a grid body for lead-acid batteries, and provides a grid body characterized by a novel structure formed by processing a sheet made of lead or a lead alloy.

In general, a grid body for lead-acid batteries consists of a net-like body made of lead or shipboard metal, a frame body, and current collector ears formed on a part of the frame body, and is filled with a paste made of a lead compound to form an electrode plate. That is.

Most conventional gratings of this type have been manufactured by casting lead alloys containing 3 to 7 antimony.

Here, antimony is added to improve the castability of the lead alloy and to improve the mechanical strength and corrosion resistance of the grid, but on the other hand, it increases the self-discharge of the battery and
This has the harmful effect of accelerating the decrease of electrolyte.

However, in recent years, there has been a growing demand for so-called maintenance-free lead-acid batteries that do not require supplementary charging or water replenishment. Such grid bodies are no longer extremely difficult to manufacture by casting.

In contrast, lattice bodies manufactured by punching or expanding lead or lead alloy sheets have been proposed, but in the former case, punching produces the fine mesh required for lattice bodies. Since this is technically difficult, there is a problem that the mesh of the mesh is coarse.

In addition, in the case of the latter, since a frame cannot be formed around the net-like body with expanded band processing, the mesh on the outer periphery is open, and if used as is, there is a risk that the paste may fall off, so it must be formed separately. I had to remove the frame,
Therefore, there is a drawback that processing costs increase.

In addition, in the latter case, which was manufactured by the method and apparatus described in U.S. Pat. There are disadvantages such as the possibility of corrosion when used in batteries because the material may become damaged or undergo large deformation even if it is not cut.

As described above, all of the conventionally proposed lattice bodies manufactured by punching or expanding have problems in practical use.

The present invention provides a lattice body made of a mesh body made by expanding a strip of lead or lead alloy sheet,
The object of the present invention is to provide a lead-acid battery lattice body having a novel configuration that eliminates the above-mentioned difficulties.

That is, the present invention provides a lead-acid battery lattice body made of a mesh body made by expanding a strip of lead or lead alloy sheet (hereinafter referred to as a lead sheet), in which the mesh body has bones extending laterally. A lattice body for a lead-acid battery, characterized in that the lattice body is made up of bones that branch from the bones that extend in the horizontal direction and extend in the vertical direction and are substantially upright, and further provided integrally with the mesh body and formed from the strut IJ tubes. The present invention provides a lead-acid battery lattice body characterized by having a frame body and current collecting ears.

Next, the present invention will be specifically described with reference to embodiments illustrated in the drawings.

FIG. 1a is a front view of a lattice body showing an embodiment of the present invention;
b is a schematic side view seen from the A-A line side, and the grid body 1 is composed of a net-like body 2 and frame bodies 5 and 6 integrated therewith, and a part of the frame body 5 has current collecting ears. 7 is formed.

The reticular body is a bone 3 extending in the longitudinal direction of the lattice body (hereinafter referred to as longitudinal bone 3).

) and a bone 4 extending laterally (hereinafter referred to as the transverse bone 4).

), the vertical bones 3 are branched from the horizontal bones 4, are inverted and stand almost upright, and fit into the frame 5 or 6.

The vertical ribs on both sides serve as the vertical frame of the lattice.

Next, the manufacturing method of the embodiment of the present invention shown in FIG. 1 will be explained using FIG. 2.

FIG. 2 is a partial view of the lead sheet strip forming the lattice body of FIG. 1 before being developed, and the strip 8 has slits 9 in a V-shape in the longitudinal direction thereof. They are arranged continuously at narrow intervals,
On both sides of the row of slits 9, portions 10 and 11 where no slits 9 are provided are provided.

If this strip 8 is expanded in its width direction until the slit 9 is approximately perpendicular to the longitudinal direction of the strip 8,
The slits 9 are deformed so as to be almost perpendicular to the longitudinal direction of the strip 8, opening a gap, and the portion between the slits 9 is deformed to be almost perpendicular to the longitudinal direction of the strip and at the same time deformed as if twisted, as shown in FIG. Transverse bone 4 and vertical bone 3 as shown
A network consisting of

Then, by punching or cutting the outer shape of the lattice body from this net-like body, the lattice body shown in FIG. 1 is formed.

Incidentally, the frames 5, 6 and the current collecting lug 7 are formed by the unslit portion of the strip 8, as is clear from FIG.

FIG. 3a is a front view of a grid body showing another embodiment of the present invention, and b
is a schematic side view taken from the B-B line side. The apparent thickness and bending strength are set at a certain level.

In this case, the vertical bones 3 are branched from the horizontal bones 4 and fit into the frame in a substantially upright manner without being inverted.

Incidentally, the lattice body in FIG. 3 also has a second
It can be manufactured more easily than a strip with slits arranged as shown in the figure.

Further, in FIG. 3, the same reference numerals as in FIG. 1 indicate the same operating parts.

FIG. 4a is a front view of a lattice body showing still another embodiment of the present invention, and FIG. 4b is a schematic side view thereof as seen from the c-c line side.
The structure of the mesh body 2 in the grid body shown in FIG. 1 is changed to make the mesh finer and the thickness of the grid body is reduced.

Such an embodiment of the present invention has a slit 9 as shown in FIG.
This can be easily manufactured by using a strip 8 in which the strip 8 is divided leaving a portion in the center that is not slitted.

Note that in FIGS. 4 and 5, the same reference numerals as in FIGS. 1 and 2 indicate the same operating parts.

As described above, the lattice body of the present invention is composed of a lattice body composed of transverse bones and vertical bones that branch from the lateral bones and are approximately upright, and the vertical bones on both sides of the lattice body extend in the longitudinal direction of the lattice body. Since it plays the role of a frame, there is no need to attach a separately prepared frame like the grid of the conventional expand processing method, and the entire surface of the grid can be filled with the active material. It has the advantage of being highly effective in preventing the active material filled in the lattice from falling off.

Furthermore, since the grid body of the present invention can be manufactured by expanding a strip of lead sheet, various shapes are possible by arranging the slits provided in the lead sheet strip and deforming the frame body. Since the body and current collecting ears are formed in one piece, it has the advantage of being able to be manufactured rationally using simple processing steps.Furthermore, the bones that make up the net-like body are simply curved, so it is difficult to stretch, etc. Since it is not subjected to forced deformation, it does not have the disadvantage of being easily corroded, and has the advantage that it does not have to be stretched and cut, resulting in scrap products, as is the case with conventional products.

Needless to say, the lattice of the present invention can be used for both an anode plate and a cathode plate, and can be used not only for lead alloys with a low antimony content or lead alloys containing no antimony, but also for general lead-antimony. It can also be manufactured from alloys.

[Brief explanation of drawings]

Figures 1a and b are front and schematic side views of a lead-acid battery lattice according to an embodiment of the present invention, and Figure 2 shows a lead sheet strip with slits forming the lattice of Figure 1. 3A and 3B are a front view and a schematic side view of a lattice body showing another embodiment of the present invention, and FIGS. 4A and 4B are a front view and a schematic side view of a lattice body showing still another embodiment of the present invention. The schematic side view, FIG. 5, is a partial view of a strip of lead sheet with slits forming the grid of FIG. 2... Reticular body, 5, 6... Frame body, 7.
... Current collector, 8 ... Strip of lead or lead alloy sheet, 9 ... Slit.

Claims (1)

[Scope of Claims] 1. A lattice body for a lead-acid battery made of a mesh body made by expanding a strip of lead or lead alloy sheet, wherein the mesh body has bones extending in the horizontal direction and bones extending in the horizontal direction. A lattice body for a lead-acid battery, characterized in that the lattice body is composed of bones that branch from the ridge and extend in a substantially vertical direction. 2. In a lattice body for a lead-acid battery made of a mesh body made by expanding a strip of lead or lead alloy sheet, the mesh body has bones extending in the horizontal direction and branches from the bones extending in the horizontal direction and is substantially erect. 1. A lattice body for a lead-acid battery, characterized in that the lattice body is made up of longitudinally extending bones, and further has a frame body and current collecting ears that are integrally provided with the mesh body and formed from the strips.