JP2626254B2 - Manufacturing method of clad lead storage battery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for manufacturing a clad lead-acid battery.

[0002]

2. Description of the Related Art Conventionally, a clad type lead-acid battery has a cladding-type anode plate and a paste-type cathode plate after a filling step of filling lead powder around a core in a cladding tube to form a clad-type anode plate. The battery is assembled by assembling the battery and the separator in a battery case, and an electrolytic solution is injected into the battery to form a battery case.

In an ordinary clad type anode plate, when an electrolytic solution is injected during chemical formation, the electrolytic solution gradually permeates from the outer periphery of the clad tube. At this time, sulfuric acid H ₂ SO ₄
Reacts with lead oxide PbO in the active material to form lead sulfate PbO.
bSO ₄ , water H ₂ O and hydrogen gas are generated.

[0004] These reactions are suppressed by reaction products near the center of the clad tube, and the permeation of sulfuric acid is slowed. In addition, the PbS
O ₄ is converted to PbO ₂ at the anode. Thus, the slower the sulfuric acid permeates the reactants, the slower the reaction from the production of PbSO ₄ to the conversion to PbO ₂ .

[0005] In this battery case formation, the step of forming an unconverted plate and the step of initially charging a converted plate are combined into a single charging step. In this way, the lead powder is converted into the active substance (Pb
Conventionally, 4 to 5 days were required as the formation time because it had to be converted to O ₂ ). In the continuous charging as a power supply condition in the battery case formation, the efficiency during power supply is reduced, so that the power supply pattern as shown in FIG.

[0006]

However, in such a conventional manufacturing method, it takes a long time to form a battery case, and lead sulphate PbSO ₄ and lead oxide PbO ₂ are used as unformed substances.
However, there is a problem that a large amount of phenol remains.

[0007] If PbSO ₄ remains too much, it is difficult to obtain an initial capacity, and PbSO ₄ is reduced (charged) during use to generate sulfuric acid H ₂ SO ₄ , resulting in an increase in specific gravity.

Further, when PbO is large, H ₂ SO _{2 is} stored during storage.
Reacts with ₄ to produce PbSO ₄ and H ₂ O, causing a decrease in specific gravity.

In addition, in such a conventional production method, since a pause must be made during chemical formation, the number of chemical formation days is four.
There is a problem that it takes a long time of up to 5 days.

An object of the present invention is to produce a clad type lead-acid battery capable of increasing the amount of PbO ₂ after chemical formation and increasing the initial capacity, shortening the chemical formation time and shortening the production time. It is to provide a method.

[0011]

Means for Solving the Problems To explain the constitution of the present invention for achieving the above object, a method of manufacturing a clad lead storage battery according to the present invention comprises the steps of: providing lead powder around a core in a clad tube; filled forms form a clad-type anode plate, the clad type anode plate was immersed in water, dried Te pulling, batteries incorporate and said clad type anode plate and the cathode plate and the separator plate to the container Is assembled, and an electrolytic solution is injected into the battery to form a battery case.

[0012]

[Action] Thus, by filling the Namariko around the core metal of the cladding tube forms form a clad-type anode plate and immersing the clad type anode plate in water and dried Te pulling, when dry The lead powder shrinks, the adhesion between the core metal and the lead powder is improved, and current easily flows during chemical formation. In particular,
Immerse the ladder anode plate in water, pull it up and dry it
To prevent the formation of 4-basic lead sulfate which is difficult to form
And the formation can be performed promptly.

[0013] Further, voids are formed as escape paths for vapor formed during drying, the porosity of the lead powder layer is improved, and the chemical reaction during chemical formation proceeds quickly to the inside.

[0014] Therefore, it is possible to increase the PbO ₂ amount after the chemical conversion, it was possible to increase the initial capacity than conventional. In addition, the formation time could be shortened.

In particular, the clad anode plate is immersed in water
In the process of drying from
The problem of corrosion of processing means that occurs when taking a drying step
Environment and environmental pollution are eliminated, and when dilute sulfuric acid is used,
It can be implemented safely at lower cost than in the case.

[0016]

Embodiments of the present invention will be described below in detail.

[0017] In this embodiment, by filling the Namariko around the core metal of the cladding tube forms form a clad-type anode plate, predetermined the clad type anode plate density 1.000, in water at a temperature 30 to 40 ° C. Let it soak for a while, let it soak in the water , then pull it up
And dry .

Thereafter, the clad type anode plate, cathode plate and separator are assembled in a battery case to assemble a battery, and an electrolytic solution is injected into the battery to form a battery case.

[0019] Thus, the clad type anode plate obtained by filling the Namariko around the core metal of the cladding tube was immersed in water, and dried Te pulling, Namariko shrinks during drying,
The adhesion between the core metal and the lead powder is improved, so that current easily flows during chemical formation. In particular, the clad anode plate is
According to the method of immersing in water, pulling and drying, it is difficult to form
4 basic lead sulfate can be prevented from being produced,
Chemical formation can be performed promptly.

In addition, voids are formed as escape paths for vapor formed during drying, the porosity of the lead powder layer is improved, and the chemical reaction during chemical formation proceeds quickly to the inside.

As a result, the amount of PbO ₂ after chemical formation can be increased, and the initial capacity can be increased as compared with the conventional case. Conventionally, the number of formation days was 4 to 5, but according to the present invention, formation could be completed in 3 days.

When the pretreatment according to the present invention is performed on the clad anode plate, as is clear from FIG. 1, the Pb at any point during the formation is higher than that of the conventional product without pretreatment.
It was confirmed to show an O ₂ value.

Also, the initial capacity of the storage battery could be increased by about 5%.

[0024]

As described in the foregoing, in the manufacturing method of the type lead-acid battery according to the present invention, the shape formed clad type anode plate by filling Namariko around the core metal of the cladding tube
And, said cladding formula anode plate immersed in water, because drying <br/> is to Te pulling, Namariko shrinks during drying, better adhesion between the metal core and該鉛powder, the current at the time of chemical conversion flow There is an advantage that it becomes easy. Especially, immersing the clad anode plate in water like this
, Then pull up and dry, it is difficult to convert to 4 basic lead sulfate
Can be prevented, and
I can make it.

Further, there is an advantage that voids are formed as escape paths for vapor formed at the time of drying, the porosity of the lead powder layer is improved, and the chemical reaction during chemical formation proceeds quickly to the inside.

Therefore, according to the present invention, PbO after chemical formation
It is possible to achieve an increase in ₂ volume can be increased <br/> pressurizing the initial capacity than conventional. Further, the formation time can be significantly reduced as compared with the conventional case.

Further, as in the present invention, a clad anode plate is used.
If you take the process of immersion in water and then drying,
A processing step that occurs when taking the step of immersion and drying
The problem of corroded stages and the problem of environmental pollution have been eliminated.
Safer implementation at lower cost than using sulfuric acid
it can.

[Brief description of the drawings]

FIG. 1 shows Pb of an anode plate during chemical formation by the method of the present invention.
FIG. 5 is a comparison diagram showing the analysis results of the O ₂ value and the analysis results of the PbO ₂ value of the anode plate during chemical formation by a conventional method.

FIG. 2 is an energization pattern diagram at the time of formation by a conventional method.

Claims (1)

(57) [Claims] 1. A filled with Namariko around the core metal of the cladding tube forms form a clad-type anode plate, the clad type anode plate immersed in water, dried Te pulling, the cladding formula A method for manufacturing a clad lead storage battery, comprising: assembling a battery by incorporating an anode plate, a cathode plate, and a separator into a battery case, and pouring an electrolytic solution into the battery to form a battery case.