JPH067565Y2 - Lead acid battery plates - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lead-acid battery electrode plate, and more particularly to a lead-acid battery electrode plate having excellent durability and dramatically extending the service life of the battery.

FIG. 1 schematically shows the structure of an automobile lead storage battery as an example of the lead storage battery. In FIG. 1, a storage battery 9 is composed of six small chambers 10a to 10f called cells, and the cells 10a to 10f are connected in series. Each cell is provided with a positive electrode plate 11, a negative electrode plate 12, and a separator 13 interposed between the positive electrode plate 11 and the negative electrode plate 12 to prevent contact between the both electrode plates 11 and 12, and an electrolytic solution (not shown). ) Is filled. Then, an electrochemical reaction proceeds between the electrolytic solution, the positive electrode active material, and the negative electrode active material to generate an electromotive force, which is collected in each positive electrode grid and negative electrode grid (not shown). Then, the generated electromotive force is taken out by the external terminal 15 'through the conductor 14' on the positive electrode side, and by the external terminal 15 "through the conductor 14" (not shown) on the negative side.

In a storage battery having such a structure, the storage battery often reaches the end of its life due to deterioration of the electrode plate, although it varies depending on the use condition, maintenance condition, use environment and the like. And as one of the causes of the deterioration of this electrode plate,
The reduction in the active material holding power of the lattice body due to use can be mentioned.
That is, when the storage battery is repeatedly charged and discharged, the bonding force between the particles of the active material in the positive electrode plate is weakened, and a corrosion layer is generated at the interface between the lattice body and the active material (lattice body surface), so that the active material holding power of the lattice body is increased. Is reduced.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a lead-acid battery electrode plate in which the lattice material has a high active material holding force and the durability is dramatically improved. To provide.

In order to achieve this object, a lead-acid battery electrode plate of the present invention is a lead-acid battery electrode plate in which an active material is held by a lattice body having vertical bones and horizontal bones, wherein the vertical bones are the horizontal bones. Is located at a substantially central portion in the thickness direction, the thickness thereof is smaller than the thickness of the active material, and the periphery thereof is covered with the active material, and the transverse bone is not less than the thickness of the active material. Is characterized by.

The present invention will be described in more detail with reference to the embodiments shown in the drawings.

2 is a partially cutaway view showing the construction of an electrode plate 20 according to an embodiment of the present invention, and FIGS. 3 and 4 are respectively shown in FIG. 2 III-I.
It is sectional drawing which follows the II line and the IV-IV line. This pole plate 20
Is the grid 21 and the active material 22 held by the grid 21.
It consists of

As shown in FIG. 5 to FIG. 7, the lattice body 21 is a frame body 23 formed in a rectangular shape by a hollow pipe, and vertical bones vertically and laterally arranged inside the frame body 23. 24 and transverse bone 2
5 is provided. The vertical bones 24 and the horizontal bones 25 are fixed to the frame body 23 one by one at regular intervals, and as shown in the drawing, the vertical bones 24 and the horizontal bones 25 are orthogonal to each other.

Therefore, the thickness d _Y of the transverse bone 25 (that is, the thickness of the bone 25 in the thickness direction of the electrode plate 20. The same applies to d _K and d _T described later) is the thickness of the active material 22. d _K , and the thickness d _T of the vertical bones 24 is smaller than the thickness d _K of the active material 22. As shown in the drawing, the vertical bones 24 are located substantially in the center of the horizontal bones 25 in the thickness direction. ing. Therefore, the periphery of the vertical bone 24 is covered with the active material 22. As is clear from the above description, according to the present invention, the active material 2
The weight of 2 is completely supported by the transverse bone 25. Therefore, even if the storage battery is repeatedly charged and discharged, the binding force between particles of the active material on the positive electrode plate is weakened, or a corrosion layer is formed at the interface between the lattice body 21 and the active material 22, the active material 22 is It is firmly held by the grid 21.

Further, since the vertical bone 24 has a thickness d _T thereof smaller than the thickness d _K of the active material 22 and is located at a substantially central portion in the thickness direction,
The longitudinal bone 24 is covered with the active material 22, and the active material 2
The two conductors are sufficiently connected to each other, and the active material 22 is sufficiently connected to the grid body 21.

In the above-mentioned embodiment, the thickness d _Y of the horizontal bones 25 is made equal to the thickness d _K of the active material 22, but the thickness d _Y of the horizontal bones 25 is smaller than the thickness d _K of the active material 22. Since the active material 22 can support the weight of the active material 22 even when it is large, the same active material holding effect as in the above-described embodiment can be obtained.

As described above, according to the electrode plate of the lead storage battery of the present invention, the horizontal bone completely supports the weight of the active material, so that the active material holding force of the lattice is high and the durability thereof is remarkably excellent. Therefore, by using this, the life of the storage battery is dramatically extended.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing the structure of a lead acid battery for an automobile, FIG. 2 is a front view of an electrode plate according to an embodiment of the present invention, and FIG.
Fig. 2 is a sectional view taken along the line III-III in Fig. 2, and Fig. 4 is IV in Fig. 2.
-IV is a sectional view taken along the line IV, FIG. 5 is a front view of the lattice body 21, FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5, and FIG. 7 is FIG.
It is sectional drawing which follows the I-VII line. 11 ... Positive electrode plate, 12 ... Negative electrode plate, 13 ... Separator, 14 '... Conductor, 15', 15 "... External terminal, 2
0 ... Pole plate, 21 ... Lattice body, 22 ... Active material, 23 ...
… Frame, 24 …… vertical bone, 25 …… horizontal bone.

Claims (1)

[Scope of utility model registration request] 1. A polar plate of a lead-acid battery, comprising an active material held in a grid body having vertical bones and horizontal bones, wherein the vertical bones are located at a substantially central portion in the thickness direction of the horizontal bones, The thickness of the lead-acid battery is smaller than the thickness of the active material, the periphery thereof is covered with the active material, and the lateral ribs are equal to or more than the thickness of the active material.