JP2001110427A - Lattice board for lead accumulator and electrode board for the lead accumulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lattice board where a paste of active substance pressurized on an upper surface of the lattice board is prevented from bulging out of or peeling from the lattice board, when the paste of active substance is pressurized using a press roller after it has been filled in the lattice board. SOLUTION: A lattice board 1 is equipped with a projected strip 2 and a projected strip 3, respectively provided on a surface of an upper frame part 1b1 and on the surface of a lower frame part 1b2 of an outer frame 1b set at a circumferencial area of a middle lattice 1a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a grid substrate for a lead-acid battery and an electrode plate for a lead-acid battery.

[0002]

2. Description of the Related Art When a conventional lead-acid battery grid substrate is used to manufacture a lead-acid battery electrode plate, first, at least a grid is filled with an active material paste by a filling machine. In order to reduce the weight and weight by making the substrate thinner, or to obtain an electrode plate with an increased capacity,
Thick coating is performed so that a coating layer of an appropriate desired thickness of the active material paste is formed so as to rise on the surface beyond the thickness of the lattice substrate. Next, this is pressed through a pressure roller to compress the active material paste and tightly press it against the grid substrate, and then dry it to produce a lead storage battery electrode plate.

[0003]

However, when the active material paste filled in the conventional grid substrate is thickly filled as described above, the grid is pressed in the next step of being pressed by the pressing roller. When the coating layer on the surface of the substrate is compressed by the pressure roller, the active material paste on both sides thereof is
It protrudes from the lattice substrate and adheres to the end face of the lattice substrate, ears and feet cast integrally with the lattice substrate, or falls and adheres to a bearing portion of a rotating shaft of a pressure roller outside thereof. As the grid substrate having such an active material paste coating layer is successively applied to the pressure roller, the bearing portion of the pressure roller is clogged with the dropped active material paste, and the pressure roller becomes unrotatable. While the pressurizing operation by the pressure roller cannot be continued, if the active material paste adhered to the substrate is left as it is, it may fall off in the storage battery and cause a short circuit failure. This results in reduced production efficiency. Therefore, it is desired to develop a grid substrate that smoothly increases productivity and produces an electrode plate for a lead storage battery with good quality stability without causing such inconvenience.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and provides a grid substrate for a lead-acid battery which satisfies the above-mentioned demands. A ridge that can be crushed by pressurization is provided. Further, the present invention provides an electrode plate for a lead-acid battery that favorably retains an active material, and is in close contact with an edge of an active material-coated layer formed on the upper surface of the grid substrate for a lead-acid battery of the present invention. A ridge is provided.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view of a grid substrate for a lead-acid battery according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line II-II of FIG.
Also, an enlarged vertical cross-sectional view in which an intermediate portion is removed is shown. Sign 1
The grid substrate for a lead-acid battery according to the present invention, which is indicated by a circle, has a middle grid 1a, an outer frame 1b composed of four sides of its four circumferences, and an upper frame 1
An ear 1c extending upward on one side of b1, a lower frame 1b2, and legs 1d, 1 disposed on the left and right extending downward on the lower frame 1b2.
The point consisting of d is the same as that of the conventional grid substrate for a lead-acid battery, but is characterized in that ridges 2 and 3 are provided at positions facing the surface of the outer frame 1b. The illustrated example is characterized in that an upper ridge 2 and a lower ridge 3 are disposed over the entire surface of the upper frame 1b1 and the lower frame 1b2 of the outer frame 1b, respectively. In the drawing, reference numeral 1e denotes an active material filling hole formed by a large number of lattice bars 1a1 crossing vertically and horizontally constituting the middle lattice 1a, 1b3 denotes a left frame portion of the outer frame 1b, and 1b4 denotes a right frame portion thereof.

The positions of the upper ridge 2 and the lower ridge 3 are
As shown, the upper frame portion 1b1 and the lower frame portion 1b
It is generally and preferably provided along the outer edge of each of the two. Thereby, the coating layer of the active material paste can be provided on the lattice substrate as much as possible. When the active material paste-filled substrate is pressed by a pressing roller as described later, each of the ridges 2 and 3 is pressed from the upper surface and crushed to allow the thick active material paste to be compressed. As described above, the width, the cross-sectional shape, and the like are selected to protrude. In the illustrated example, each of the ridges 2 and 3 has a triangular cross section, the width of the base is 0.5 mm, the height to the top is 0.8 mm, and the height is increased to 0.4 to 0.5 mm by a pressure roller. It will be crushed. Generally, the width of each of the ridges 2 and 3 is 0.
When the width is 5 mm to 1.0 mm, the coated surface of the active material paste applied to the upper surface of the conventional lattice substrate does not substantially decrease. The crushed height is reduced, thereby allowing the thickness of the filled and coated active material paste to be tightly compressed by pressing with a pressing roller. In addition, each ridge 2, 3
Can be arbitrarily set according to the thickness of the active material paste layer applied and formed on the upper surface of the lattice substrate by the filling machine. Generally, the height is selected from the range of 0.5 mm to 2.0 mm.

[0007] The grid substrate for a lead-acid battery of the present invention can be cast by either a conventionally known continuous casting method or a batch type non-continuous manufacturing method. explain. FIG. 3 shows an example of a continuous casting apparatus 4 for a grid substrate for a lead-acid battery according to the present invention.
Consists of a rotary drum mold 5 and a molten metal supply unit 6 of lead or a lead alloy. The rotary drum mold 5 has a grid body forming unit 5a, 5a,
... are continuously carved. The rotating drum mold 5 is cooled by cooling water supplied to the inside. In the drawing, 5b is
3 shows a rotation axis of the rotary drum mold 5. The molten metal supply section 6 has an arc-shaped concave surface 6a whose inner surface matches the outer peripheral surface of the rotary drum mold 5, and a rectangular opening concave portion 6b is provided at the center thereof. The nozzle holes 6c, 6c,... Arranged in the width direction are opened in the opening concave portion 6b, and the nozzle holes 6c, 6c,. The configuration of the continuous casting apparatus 4 is the same as that of the conventional casting apparatus. However, in order to continuously cast the lattice substrate 1 of the present invention, as shown in FIG.
The upper ridge 2 and the lower ridge 3 engraved left and right on the arc-shaped concave surface 6a from the lower end of the rectangular opening concave portion 6b to the lower end of the arc-shaped concave surface 6a. The present invention is different in that it is provided with the ridge casting concave strips 2a and 3a.

The rotary drum mold 5 of the continuous casting apparatus 4 is rotated as shown by an arrow, and the molten metal is supplied from the rectangular opening recess 6b of the molten metal supply section 6 to each lattice member forming surface of the mold 5 surface. Are continuously supplied to the left and right ridge casting recesses 2a and 3a, as shown by parallel oblique lines on the downstream side of the rectangular opening recess 6b. The right frame in the drawing with the ears 1c of the cast basic lattice structure, ie, along the outer edge of the upper frame 1b1 and the left frame in the drawing with the legs 1d, ie, the outer edge of the lower frame 1b2, respectively. The lattice substrate 1 of the present invention having the upper ridges 2 and the lower ridges 3 on one surface is cast sequentially and continuously. Thus, a large number of continuous lattice substrates 1, 1,... Of the present invention are left and right frame portions 1b3, 1 of the outer frame of each adjacent lattice substrate 1, 1.
A long connecting strip-shaped body connected at the connecting portion indicated by the imaginary line of b4 is obtained, and is pulled forward through the guide roller 7,
Next, the grid substrates 1, 1,... Connected by the active material paste filling machine for the positive electrode or the negative electrode are connected to the grid substrates 1, 1,. The active material paste is filled so as to swell on the surface on which the ridges 2 and 3 are provided, and is then pressed by a pressure roller device,
Next, the cutting machine cuts the left of each of the adjacent lattice substrates 1 and 1,
It is cut at the joint of the right frame portions 1b3 and 1b4, and a large number of lead storage battery plates are obtained. It is then dried and aged to complete production.

Since the grid substrate of the present invention has ridges 2 and 3 on the surface of the upper frame 1b1 and the lower frame 1b2 in advance, the active material paste A is used as shown in FIG.
Is filled into the lower space of the middle lattice 1a and all the holes 1e surrounded by the outer frame 1b, and at the same time, a desired thickness is applied to the entire surface of one surface of each lattice substrate 1. Fill coating is performed so that a coating layer a having a constant thickness equal to the height of the projected and projected ridges 2 and 3 is formed. In the drawing, reference numeral 8 denotes a conveyor belt. Next, the active material paste A filled and coated on the grid substrate 1 is pressed and compressed through a pair of pressure rollers 9 and 9 having a diameter of 50 to 100 mm of a pressure device. In this case, FIG. As shown, the lattice substrate 1
The ridges 2 and 3 on both sides are pressurized, and the ridges 2 and 3 are slightly crushed to compress the active material paste A, thereby increasing the adhesion to the grid substrate 1 and the uniform packing density. I can do it. Thus, an electrode plate filled with the active material paste having a constant thickness corresponding to the height of the ridges 2 and 3 can be continuously manufactured. According to the present invention, the ridges 2 and 3 are provided on the surfaces of the upper frame 1b1 and the lower frame 1b2 of the lattice substrate 1.
Is provided, when the coating layer a of the active material paste A on the upper surface of the lattice substrate 1 is compressed in the pressing step by the pressure roller, it can be prevented from protruding from the lattice substrate 1 and falling off. The active material adheres to the end face of the lattice, the ears and the feet, or the active material paste that has fallen off adheres to the bearing (not shown) of the rotating shaft of the lower pressure roller 9 or clogs this to rotate. It is possible to eliminate the inconvenience of making it impossible and to interrupt the pressurizing work, and it is possible to smoothly and efficiently manufacture the electrode plates continuously.

The electrode plate of the present invention thus produced is
The upper and lower edges of the active material coating layer pressed and coated on the lattice substrate are protected from contact with the outside world by the ridges 2 and 3 which are firmly adhered to the active material coating layer. Therefore, a stable and stable lead-acid battery electrode plate is provided.

In the above embodiment, the case where the lattice substrate 1 of the present invention is cast by the continuous casting method has been described.
It is a matter of course that the lattice substrate of the present invention may be separately cast in a batch system using a discontinuous lattice substrate casting mold in which grooves for forming the ridges 2 and 3 are formed in advance. Also, ridges for ridge casting are formed on the outer corresponding portions of the lattice body forming portions 5a, 5a,... Of the rotary drum mold 5, and ridges are arranged on the outer frames on both surfaces of the lattice substrate. May be obtained. Further, in the above-described embodiment, an example in which the ridges are provided only on the outer frame orthogonal to the axial direction of the pressure rollers 9 and 9 is shown. A ridge may be provided on the frame. Furthermore, in the above embodiment,
The case where the ridge is provided on only one surface of both surfaces of the outer frame 1b of the grid substrate for a lead storage battery has been described.
The ridges may be provided only on the other surface or on both surfaces.

[0012]

According to the present invention, as the grid substrate, a ridge is provided on the surface of the outer frame surrounding the grid inside the grid substrate. When the press-filled active material paste is pressed, the active material paste layer on the surface of the grid substrate does not protrude outside the grid substrate and does not fall off. Bring the plate.

[Brief description of the drawings]

FIG. 1 is an enlarged front view of a lattice substrate according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a part of the cutting line II-II in FIG. 1;

FIG. 3 is a side view in which a part of the continuous casting apparatus for a lattice substrate of the present invention is cut away.

FIG. 4 is a perspective view of a molten metal supply device.

FIG. 5 is a front view showing an operation state of the continuous casting device.

FIG. 6 is an enlarged view in which a part of a step of filling and coating an active material paste on a lattice substrate of the present invention by a filling machine is omitted.
Sectional view.

FIG. 7 is an enlarged cross-sectional view showing a state in which a grid substrate filled and coated with an active material paste is pressed by a pressing roller.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Lattice board | substrate of this invention 1a Middle lattice 1b Outer frame 1b1 Upper frame part 1b2 Lower frame part 2 Upper ridge,
Ridge 3 lower ridge, ridge

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H016 AA05 CC06 EE01 HH15 5H017 AA01 AS01 BB06 BB11 CC05 CC11 HH05

Claims (2)

[Claims] 1. A grid substrate for a lead-acid battery, wherein a ridge that can be crushed by pressure is provided on the surface of an outer frame surrounding the middle grid. 2. An electrode plate for a lead-acid battery, wherein a ridge is provided in close contact with an edge of an active material coating layer formed on the surface of the grid substrate for a lead-acid battery according to claim 1.