JPS58209066A - Expanded grid for lead-acid battery and its manufacture - Google Patents

Abstract

PURPOSE:To reduce weight of a grid by forming an expanded grid for lead- acid battery which width and thickness of small bone are gradually reduced toward lower main bone from upper main bone. CONSTITUTION:The thickness of a roll sheet 7 comprising lead-calcium alloy is gradually reduced from position A forming an upper main bone 2 and a lug 3 to position B forming a lower main bone 4. Zigzag rifts having reduced spaces corresponding to thickness are formed, then expanded to make an expanded grid 1 for a lead-acid battery. Width W1 and W2, and thickness T1 and T2 of small bones 5 and 6 are gradually reduced toward lower main bones 4 from upper main bones 2, the ratio of cross section S1 of 5 and cross section S2 of 6, S2/S1, is specified to 0.25-0.5. Therefore, weight of the grid 1 is reduced, current density of small bones 5 and 6 is uniformed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to an expanded grid for lead-acid batteries and a method for manufacturing the same.

Is there one that is thinner than this kind of lattice body 4j,,vJ? II, it is now being put into practical use, especially in automotive and marine storage batteries, where there is a strong demand for weight reduction.

The present invention aims to provide a one-band lattice body that is one step further in pumice formation than conventional products without making the mesh of the lattice body particularly coarse, and a method for manufacturing the same.

The present invention will now be described based on one embodiment.

In the figure, 1 is an expanded lattice body of the present invention.

2 is -nibugumi'i? , 3. Part of the ear is formed integrally with the outer rib 2, and 4 is! 5 is a 2-part ossicle, 6 is a lower ossicle, 7 is a rolled sheet made of lead-ironium alloy or lead-antimony alloy, from part A forming the upper rib 2 and ears 6 to the lower rib 4. The thickness gradually decreases toward the part B where it forms.

8 is 1, K2, K at each interval depending on the thickness of Sea 1 which gradually decreases.
Staggered cuts made by gradually decreasing 1.

T] and T2 are respectively the thickness of the second ossicle 2 and the lower ossicle 4, Wl and W2 are the upper ossicle 2 and the lower ossicle 4, respectively, and S and S2 are the 11th, respectively. Part 1 is the cross-sectional area of the ossicle 2 and part F is the ossicle 4.

To obtain the lattice body 1 of the present invention, rolled sheets 7 as shown in FIGS. 6 and 4 are sequentially fed out.

+771 in a staggered manner as shown in FIG.
After inserting 18 and unfolding the fidget as shown in Figure 6, -
1. Leave a part of the rib 2 and the ears 6 at the locations shown by the chain lines in the same figure, and cut the bales as appropriate. Of course, it is free to fill the active material before the cutting process.

4. In the Oniki example, one roll of roll sheet 7 has 17 rolls.
The case where two rows of lattice bodies 1 are formed has been explained, but
It is also possible to form one row of lattice bodies depending on the shape of the roll sheet 7 and the shape of the integrated 1.
The cross-sectional shape of the roll sheet 7 is not limited to one in which only one side is sloped as shown in FIG. 4, but may be sloped on both sides as shown in FIG.

By the way, for each interval of the small bone width, in other words, the cut []8, -2・K3...... is the limit of extract band processing and 1/-11' 70% of the discharge. A numerical example is shown below when set to .

That is, if the thickness T1 of the second ossicle 5 and the thickness T2 of the lower ossicle 2 are 1 degree and 0.5 degrees, respectively.

Both A's 111W, W2 Kesonezore 0.7 and 0.6
The ratio (1) of the cross-sectional area of 5 and lr is I. There is a limit to making the thickness thinner due to productivity reasons, so the +tfil ratio is 0.25 to 0. 5
That's 9! Delicious.

In any case, set the cross section of -1 part ossicle 5 and F part ossicle B (ratio ('L) of A1 to 0.25 to 0.51 and B. Knee 1 - Span 1゛ reduction. Within the possible range of
This means a savings of 50%.

A. The invention provides a roll sheet 7 whose thickness is reduced by 111i from the region A where the upper ribs 2 and ears 6 are formed to the region B where the upper ribs 4 are formed. 1, K2, K3, etc. at each interval depending on the thickness of the note that gradually decreases.
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ． Since it forms an expanded type lattice body, the difficulty of creating a thin lattice body is further reduced compared to conventional products.

It has the advantage that the current density in the ossicles is averaged and loss due to resistance during charging and discharging is also reduced.

[Brief explanation of the drawing]

Fig. 1 is a front view of the lattice body of the present invention, Fig. 2 is a side view of the same, Fig. 6 is a perspective view of the rolled sheet, Fig. 4 is a sectional view taken along line XX in Fig. 6, and Fig. 5 is a cutaway view. Fig. 7 is a partial plan view of the rolled sheet containing the rolled sheet 1.
The figure is a sectional view corresponding to FIG. 4 showing the other side of the rolled notebook. 1. Lattice body 2: Upper rib: Ear 4: F section rib 5: J bipartite ossicle 6: [ζ section ossicle 7, roll seal I/8: Cut II 5- Wl: Ill of the G section ossicle W,, : 'F
Thickness of the lower ossicles [11T] Thickness of the lower ossicles T2: Thickness of the lower ossicles 1, K2, K3......: Cut interval

Claims (1)

[Scope of Claims] 1) An expanded lattice body for a lead-acid battery, characterized in that the width and thickness of the small ribs are gradually decreased from the two-part rib to the lower rib. 2) The expanded lattice body for a lead-acid battery according to item 1, which is the range of the cross-sectional area S of the upper ossicle and the cross-sectional area S2 of the lower ossicle. 6) "A roll sheet whose thickness gradually decreases from the part where the ribs and ears are formed to the part where the lower ribs are formed,
A method for manufacturing an expanded lattice for a lead-acid battery, which comprises first making staggered cuts at intervals corresponding to the gradually decreasing thickness of the sheet and then rolling out the sheet.