JPH0642365B2 - Method for manufacturing electrode plate for lead acid battery - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing a lead storage battery electrode plate.

[Prior Art] Conventionally, in a process of manufacturing an electrode plate for a lead storage battery, if the active material paste is filled in a grid body having a wide gap between horizontal ribs, the filling paste may be partially sagged or dropped. To prevent this, as shown in FIG. 1, the paper 3 is attached to one side (or both sides) of the active material paste layer 2 formed by filling the lattice space of the lattice body 1, and then the active material paste layer 2 The plate was completed by aging and drying.

[Problems to be Solved by the Invention] In the above-mentioned paper-coated electrode plate, the adhesion between the paper 3 and the paste layer 2 at the time when the paper 3 is pasted is good, but the paper 3 after aging is Since the adhesive force with the active material layer is weakened, the paper 3 is easily peeled off and the active material strength is weak. For this reason, an accident such as peeling of the active material may occur in the storage battery assembling process.

The adhesive strength between the paper 3 and the active material layer is weakened after aging because the lead oxide of the active material paste layer 2 and the lead oxide of the paste that has penetrated into the paper 3 have a granular composition, respectively. It is considered to be weak.

An object of the present invention is to provide a method for manufacturing a lead storage battery electrode plate capable of improving the adhesive strength between the paper and the active material layer and the strength of the active material.

[Means for Solving Problems] A configuration of the present invention for solving the above problems will be described below with reference to FIG.

In the first invention of the present application, the paper 3 is formed on at least one surface of the active material paste layer 2 formed by filling the grid space portion of the grid body 1 with the active material paste containing lead oxide and water as main components. The electrode plate for a lead storage battery is manufactured by aging the paper-attached electrode plate to which is attached in an atmosphere containing carbon dioxide gas.

Further, in the second invention of the present application, a paper is formed on one surface of an active material paste layer 2 formed by filling the lattice space of the lattice body 1 with an active material paste containing lead oxide and water as main components. After applying dilute sulfuric acid having a sulfuric acid concentration to the other surface of the active material paste layer 2 of the paper-attached electrode plate to which 3 is attached, the lead-acid battery electrode plate is obtained by aging in an atmosphere containing carbon dioxide gas. To manufacture.

[Operation of the Invention] In the production method of the first invention of the present application, basic lead carbonate is contained in the paste that has penetrated into the surface side of the active material paste layer 2 and the paper 3 by the action of carbon dioxide gas during aging of the electrode plate. Since the generated basic lead carbonate causes a binding force between the active material paste layer 2 and the paper 3, the adhesive force between the active material layer and the paper is strengthened.

In the manufacturing method of the second invention of the present application, the electrode plate having the active material paste layer 2 on one side of which the paper 3 is adhered is coated with dilute sulfuric acid on the other side and aged in a carbon dioxide atmosphere. As a result, the strength of sticking the paper to the electrode plate is sufficiently improved and the strength of the active material is also improved.

Embodiments Embodiments of the present invention will be described in detail below with reference to the drawings. Also in the electrode plate manufacturing method according to the present invention, the above-mentioned first
Forming a paper-coated electrode plate as shown is the same as the conventional manufacturing method. Then, in the embodiment of the first invention of the present application, in order to strengthen the adhesive force between the paper 3 and the active material paste layer 2, the above-mentioned paper-attached electrode plate is adjusted to have a volume ratio (Vo
%) In an atmosphere of 0.05% or more. Due to the action of carbon dioxide gas during this aging, between the lead oxide on the surface side of the active material paste layer 2 and the lead oxide in the paste that has penetrated into the paper 3,
Changes occur as shown in the chemical formula below.

Due to the formation of the basic lead carbonate, a binding force is generated between the lead oxide on the active material paste layer 2 side and the lead oxide in the paste that has penetrated into the paper 3, and the paper 3 is attached to the active material paste layer 2. The adhesion strength is improved.

FIG. 2 shows the relationship between the carbon dioxide concentration and the paper sticking strength in the above treatment. Carbon dioxide is approximately 0.03% in the air, and the paper sticking strength when aged in air is about 20g / 50mm.

On the other hand, when it is aged in an atmosphere with a carbon dioxide gas concentration of 0.05%, the paper sticking strength starts to increase to about 30 g / 50 mm. Therefore, in the present invention, the carbon dioxide concentration was set to 0.05% or more by improving the paper sticking strength as compared with the conventional one, but it is desirable to set this concentration as shown in FIG.
By setting it to about 0.5% or more, sufficient paper sticking strength that does not interfere with the storage battery assembly process can be obtained.

Next, in the embodiment of the second invention of the present application, a sulfuric acid concentration is applied to the other surface of the active material paste layer 2 with respect to the electrode plate in which the paper 3 is attached to one surface of the active material paste layer 2. 5-
After applying 40% dilute sulfuric acid, it is aged in a carbon dioxide gas atmosphere as described above. This improves both the paper sticking strength and the active material strength.

Fig. 3 shows the relationship between the concentration of sulfuric acid and the strength of the active material. In order to make the strength of the active material 0.075 [1 / fall amount (g)] or more necessary for the assembly process, Dilute sulfuric acid may be used.

When the dilute sulfuric acid is applied to the paper-adhering side of the paper-adhering electrode plate, the improvement in the paper-adhesion strength when aged in a carbon dioxide atmosphere is slightly hindered. This is because the lead oxide in the active material paste layer 2 becomes lead sulfate by the application of the dilute sulfuric acid, and the lead oxide that has penetrated into the paper 3 also becomes lead sulfate. This is because the basic lead carbonate that generates force is less likely to be generated.

FIG. 4 shows the relationship between the sulfuric acid concentration and the paper sticking strength, and when dilute sulfuric acid is applied to the paper sticking side,
It can be seen that the paper sticking strength deteriorates as the sulfuric acid concentration of dilute sulfuric acid increases.

From the above, the sticking of the paper 3 is carried out by the active material paste layer 2
By applying the dilute sulfuric acid to only one surface and applying the dilute sulfuric acid only to the surface to which the other paper 3 is not adhered, the paper adhesion strength can be sufficiently improved and the active material strength can also be improved. .

The following table shows the paper sticking strength and the active material strength of four kinds of single-sided paper-coated electrode plates having different manufacturing conditions. In the following table, electrode plate A is an electrode plate manufactured by a conventional method of aging in air, electrode plate B is coated with dilute sulfuric acid having a sulfuric acid concentration of 15/20%, and electrode plate C is the same dilute sulfuric acid. Coated on one side opposite to the paper-pasted side and aged in a carbon dioxide atmosphere with a concentration of 1%, and electrode plate D aged in a carbon dioxide atmosphere with a concentration of 1% without coating dilute sulfuric acid. Is.

As can be seen from the above table, the electrode plates B, C, and D manufactured by the manufacturing method according to the embodiment of the present invention are significantly improved in the paper sticking strength and the active material strength as compared with the electrode plate A manufactured by the conventional manufacturing method. is doing. In particular, the electrode plate C aged in a carbon dioxide atmosphere by applying dilute sulfuric acid on one surface of the active material paste layer opposite to the paper-adhering surface is excellent in both strengths.

As described above, according to the manufacturing method of the first invention of the present application,
The active material layer is formed by aging a paper-attached electrode plate in which a paper is attached to at least one surface of the active material paste layer formed by filling the lattice body with the active material paste, in an atmosphere containing carbon dioxide gas. It is possible to manufacture a lead-acid battery electrode plate having a high paper sticking strength with respect to. The second aspect of the present application
According to the manufacturing method of the invention, the paper is pasted on one surface of the active material paste layer, the other surface is coated with dilute sulfuric acid having a sulfuric acid concentration, and then aged in an atmosphere containing carbon dioxide gas. It is possible to manufacture an electrode plate for a lead storage battery, which has sufficiently high sticking strength and active material strength.

[Brief description of drawings]

FIG. 1 is a sectional view showing the outline of a paper-coated electrode plate, FIG. 2 is a curve diagram showing the relationship between carbon dioxide concentration and paper-sticking strength, and FIG.
The figure is a curve diagram showing the relationship between sulfuric acid concentration and active material strength.
The figure is a curve diagram showing the relationship between sulfuric acid concentration and paper sticking strength. 1 ... Lattice body, 2 ... Active material paste layer, 3 ... Paper.

Claims (5)

[Claims] 1. A paper in which paper is attached to at least one surface of an active material paste layer formed by filling an active material paste containing lead oxide and water as main components in a lattice space of a lattice. A method for producing an electrode plate for a lead storage battery, which comprises aging the attached electrode plate in an atmosphere containing carbon dioxide gas. 2. The concentration of carbon dioxide in the atmosphere is 0.
The method for producing a lead-acid battery electrode plate according to claim 1, wherein the amount is 05% or more. 3. A paper pasting in which a paper is pasted on one surface of an active material paste layer formed by filling the lattice space of the lattice body with an active material paste containing lead oxide and water as main components. A method for producing an electrode plate for a lead storage battery, which comprises applying dilute sulfuric acid to the other surface of the active material paste layer of the electrode plate and then aging in an atmosphere containing carbon dioxide gas. 4. The concentration of carbon dioxide in the atmosphere is 0.
The method for producing a lead-acid battery electrode plate according to claim 3, wherein the amount is 05% or more. 5. The method for producing an electrode plate for a lead storage battery according to claim 3, wherein the sulfuric acid concentration of the dilute sulfuric acid is 5 to 40% by weight.