JP2002008666A - Alkaline cell, and its manufacturing method and manufacturing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a reliable cell concerning an alkaline cell composed of a mercury additive-free negative electrode mixture, by securing liquid leakage-- resistant nature. SOLUTION: In the alkaline cell in which a negative electrode electricity collector pin 5 made of copper or a copper alloy is inserted in the mercury additive-free negative electrode mixture 4, the negative electrode electricity collector pin is composed of a wire component 26 of which a surface layer is scraped off with a thickness of 0.05 mm to 0.3 mm in at least either before or after the last wire stretching work of a wire stretching process by reducing work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alkaline battery, particularly to an alkaline battery having a negative electrode current collector pin inserted into a mercury-free negative electrode mixture, and a method and apparatus for producing the same. It is intended to improve.

[0002]

2. Description of the Related Art In recent years, electronic devices have become smaller and more portable, and devices driven by alkaline batteries have been increasing. As shown in a schematic cross-sectional view of FIG. 1, for example, this alkaline dry battery includes, in a bottomed cylindrical positive electrode can 1, a tube having an outer peripheral shape substantially matching the inner peripheral surface of the cylindrical portion of the positive electrode can 1. The positive electrode mixture 2 molded into a shape is inserted. This positive electrode 2
A cylindrical separator 3 with a bottom is inserted and arranged in the center hole of the above, and a negative electrode mixture 4 is loaded into the separator 3 while being physically separated from the positive electrode mixture 2 by the separator 3.

[0003] A negative electrode current collector pin 5 is inserted into the center of the negative electrode mixture 4, and its head is welded to a metal negative electrode terminal plate 6 provided at a sealing portion at the opening end of the positive electrode can 1, for example. Electrically connected by The sealing portion at the open end of the positive electrode can 1 has, for example, a negative electrode terminal plate 6 and a metal reinforcing plate 7 such as iron, which is disposed to face the inner surface thereof. In a state where the peripheral portion of the reinforcing plate 7 is brought into contact with the peripheral portion, the peripheral portion is sandwiched by a plastic seal, that is, a gasket 8, and in this state, the opening edge of the positive electrode can 1 is caulked and sealed in a liquid-tight manner. Gasket 8
A boss 9 is formed at the center of the battery, and the negative electrode current collecting pin 5 penetrates through the boss 9 to set the negative electrode current collecting pin 5 at the center of the battery.

The negative electrode current collecting pin of such a battery is usually
It is manufactured by a method similar to the method of manufacturing a copper wire. In the rough manufacturing process, the blended raw materials are melted and cast, and the resulting pellets are cut into required sizes, and the resulting pellets are heated, extruded hot, and subjected to a cold drawing process in which the diameter is reduced by a die. A wire rod having a required wire diameter is produced, and this is cut into a required length to produce a negative electrode current collector pin. In this case, for example, from a pellet having a diameter of 260 mm,
The wire rod having a required diameter is finally obtained by repeating the above-described cold drawing step of sequentially reducing the diameter by hot extrusion or drawing by passing through a plurality of dies. In this way, for example, a thick wire having a diameter of 25 cm to 30 cm is subjected to cold drawing by a plurality of dies having sequentially reduced inner diameters to obtain a wire having a desired diameter, for example, a thickness of about 1.45 mm. There is a method in which the wire thus obtained is cut to a required length to obtain a negative electrode current collector pin.

On the other hand, in the case of alkaline batteries, in order to attain liquid leakage resistance, a mercury-added negative electrode mixture capable of avoiding generation of hydrogen, which causes an increase in battery internal pressure, has been used. Since it is desired to avoid such a problem, there is a demand for the spread of an alkaline battery using a negative electrode mixture containing no mercury. In the case of a battery configuration using this mercury-free negative electrode mixture, the negative electrode current collector pins generate Cr, Fe, Co, Ni, and Mo that react with the negative electrode mixture to generate hydrogen.
It is necessary that mixing of heavy metals such as the like be avoided as much as possible.

However, in the case of the above-described method for manufacturing a negative electrode current collector pin, the liquid leakage resistance tends to be insufficient. This is considered to be due to the fact that heavy metal adheres due to direct or indirect contact with the dies and other metal parts during the above-described wire drawing, for example. Therefore, it has been proposed to eliminate such a heavy metal adhesion surface (Japanese Patent No. 2946894). In this method, during the wire drawing step, the surface of the wire is cut with a thickness of about 0.01 mm, that is, so-called peeling is performed. However, even in the case of this method, the leakage resistance is not always satisfactory, and further improvement in reliability is desired.

[0007]

SUMMARY OF THE INVENTION In the present invention, in an alkaline battery using a negative electrode mixture containing no mercury, it is possible to reliably secure liquid leakage resistance and to obtain a highly reliable battery of this type. . Things. Further, in the present invention, it is possible to improve the strength of the current collecting pin, to facilitate the handling thereof, and to facilitate the assembly and production of the battery, and to improve the yield.

That is, the present inventors have conducted various studies, experiments, and considerations, and have obtained a wire obtained by peeling the surface of the wire to a thickness of about 0.01 mm during the drawing process as described above. In the battery manufactured by producing the negative electrode current collecting pin, in particular, regarding the battery in which the liquid leakage occurred, these were disassembled, and the heavy metal adhering to the negative electrode current collecting pin was measured. 95.00% of generated batteries
Is a battery having a heavy metal having a diameter of less than 0.03 mm, 4.80% is a battery having a heavy metal having a diameter of 0.03 mm or more and less than 0.05 mm, and 0.19% is a battery having a diameter of 0.05 mm or more and less than 0.05 mm. It was determined that the battery had a heavy metal of less than 30 mm, and that 0.11% of the battery had a heavy metal having a diameter of 0.30 mm or more. In other words, even if such a peeling step is performed during the wire drawing step, or the thickness of the peeling is performed about 0.01 mm, the subsequent peeling step is performed directly with a metal part such as a wire drawing die or the like. Heavy metal deposition due to indirect contact;
It is considered that even if the skin is peeled to a thickness of about 1 mm, the heavy metal having a large particle diameter has an effect of pushing the heavy metal into the wire.

In the present invention, it is intended to eliminate such heavy metals without fail, and it is further investigated that the strength of the current collecting pin can be increased in such a case. And a highly reliable alkaline battery.

[0010]

That is, an alkaline battery according to the present invention is an alkaline battery comprising a negative electrode current collector made of copper or a copper alloy inserted into a negative electrode mixture containing no mercury. The electric pin is used immediately before the final wire drawing operation of the final wire drawing step of determining the wire diameter by drawing (the immediately preceding wire drawing operation is before the final wire drawing operation and before the final wire drawing operation). Or at least one of after the final drawing operation, and is configured by a wire rod having a surface layer cut to a thickness of 0.05 mm to 0.3 mm.

The method for producing an alkaline battery according to the present invention is a method for producing an alkaline battery comprising inserting a negative electrode current collector pin made of copper or a copper alloy into a negative electrode mixture containing no mercury. A wire made of copper or a copper alloy for producing an electrical pin is drawn into a wire drawing step by a plurality of stages of cold drawing, and immediately before a final wire drawing operation for determining a wire diameter in the wire drawing step (this immediately before is the final The cutting operation of the surface layer of the wire rod is performed before the drawing operation and after the drawing operation at the preceding stage of the final drawing operation.) Or at least after the final drawing operation. A cutting work process,
Cutting the wire thus cut to a required length to produce a negative electrode current collector pin.

Further, the apparatus for manufacturing an alkaline battery according to the present invention is an apparatus for manufacturing an alkaline battery, comprising a negative electrode current collector made of copper or a copper alloy inserted into a negative electrode mixture containing no mercury. A hot extruding means for hot-extruding a molten wire material for producing an electrical pin to obtain a wire element body, and a plurality of cold drawing dies for drawing the wire element body obtained by the hot extrusion means. Cold drawing means arranged and immediately before the final drawing die for cold drawing of the cold drawing means (immediately before means before this final drawing work die and at this final drawing). Cutting means for cutting the surface layer of the drawn wire material, which is arranged at least after the wire drawing die before the wire drawing die.) Or at least after the final wire drawing die. Have.

The above-described final drawing operation or final drawing die in the alkaline battery and the method and apparatus for manufacturing the alkaline battery according to the present invention is not limited to the final drawing operation when a plurality of drawing steps are repeated. It refers to the final drawing operation and the final drawing die in the drawing process.

In the above-described method and apparatus according to the present invention, the cut thickness of the surface layer of the drawn wire is 0.05 mm to 0.1 mm.
The thickness is 3 mm.

As described above, the alkaline battery using the mercury-free negative electrode mixture according to the present invention was able to drastically reduce the occurrence of liquid leakage. This is, in the manufacturing process of the wire to obtain the negative electrode current collector pin, in the final drawing operation of the drawing process by drawing, by forming the surface layer with a wire cut to a thickness of 0.05 mm or more, This is because not only impurities such as heavy metals adhering to the surface but also impurities that have penetrated by drawing or the like were surely removed from the wire. In this case, the reason why the thickness of the cutting is set to 0.3 mm or less is that even if the cutting is further performed, that is, peeling is performed, the effect on the leakage resistance is hardly improved, and the material is wasted. It depends only on you.

The alkaline battery obtained by the production method of the present invention and the apparatus of the present invention for carrying out the method have an improved leakage resistance and an increased strength for the reasons described above.

[0017]

FIG. 1 is a schematic sectional view of an example of an alkaline battery to which the present invention is applied. However, the present invention is not limited to this example, needless to say. In this example, as described above, in the bottomed cylindrical positive electrode can 1,
A cylindrical positive electrode mixture 2 having an outer peripheral shape substantially matching the inner peripheral surface of the cylindrical portion of the positive electrode can 1 is inserted. A cylindrical separator 3 having a bottom is inserted and disposed in the center hole of the positive electrode 2. In the separator 3, the separator 3 is physically separated from the positive electrode mixture by the negative electrode mixture 4. In, the negative electrode mixture 4 containing no mercury is loaded.

A negative electrode current collector pin 5 is inserted into the center of the negative electrode mixture 4, and its head is connected to a metal negative electrode terminal plate 6 provided at a sealing portion at the opening end of the positive electrode can 1. For example, they are electrically connected by welding. Further, the sealing portion at the opening end of the positive electrode can 1 has, for example, a negative electrode terminal plate 6 and a metal reinforcing plate 7 such as iron, which is disposed to face the inner surface thereof,
With the flange portion of the negative electrode terminal plate 6 abutted against the peripheral portion of the reinforcing plate 7, this peripheral portion is sandwiched by a plastic seal, that is, a gasket 8, and in this state, the opening edge of the positive electrode can 1 is swaged. And seal tightly. A boss 9 is formed in the center of the gasket 8, and the negative electrode current collecting pin 5 is penetrated therethrough so that the negative electrode current collecting pin 5 is set at the center of the battery. At the center of the bottom of the positive electrode can 1, a convex positive electrode terminal 10 extruded outward is formed. An outer label 11 on which a manufacturer name, a battery type, a precautionary statement, and the like are written is wound around the surface of the positive electrode can 1, and both ends are narrowed down to both ends of the positive electrode can 1.

The positive electrode mixture 2 can be made of, for example, manganese dioxide, graphite, an aqueous solution of potassium hydroxide, or the like.
It is formed in size.

The separator 3 disposed in the hollow of the positive electrode 2 is made of, for example, a polyolefin nonwoven fabric, and is inserted so as to contact the hollow inner peripheral surface of the positive electrode 2.

The negative electrode mixture 4 can be constituted by a gel negative electrode mixture containing, for example, granular zinc, an aqueous solution of potassium hydroxide, a thickener and the like.

In one embodiment according to the present invention, in the alkaline battery having this configuration, as described above, the negative electrode current collector pin 5 is used for the final drawing operation in the drawing step by drawing copper or a copper alloy such as brass. At least one of immediately before and after 0.05 mm to 0.3 mm
It is composed of a wire rod obtained by cutting a surface layer having a thickness of.

The method for producing an alkaline battery according to the present invention comprises:
For example, a mercury-free negative electrode mixture 4 having the above-described configuration is
This is a method for manufacturing an alkaline battery in which a negative electrode current collecting pin 5 made of copper or a copper alloy, for example, brass is inserted.

In the method of the present invention, in producing a wire for producing the negative electrode current collector pin 5, first, as usual, the raw materials are blended, and the raw materials are dissolved and cast.
The ingot is cut to obtain a pellet having a diameter of, for example, 260 mm. Then, the pellet is heated and hot-extruded to obtain a wire rod having a diameter of, for example, 12.5 mm. This is wound, for example, once, and is led through an intermediate inspection process to a cold drawing process by drawing. The cold drawing process is performed by a plurality of drawing operations to sequentially reduce the inner diameter. Further, the cold drawing process by the plurality of drawing operations is repeated a plurality of times. In between, a peeling step, an annealing step, a cleaning step, and the like can be interposed as necessary.

In the present invention, in particular, after the final drawing operation in the final drawing step, that is, in the next stage of the final drawing operation, the surface layer of the final drawn wire rod is placed before the final drawing operation. It is cut or peeled with a thickness of 0.05 to 0.3 mm over the circumference. In this way, a wire having a desired diameter, for example, 1.45 mm for obtaining a negative electrode current collector pin is obtained.

FIG. 2 is a schematic diagram showing an essential part of an embodiment of the apparatus of the present invention for carrying out the above-described method of the present invention. In this apparatus, not shown, but in the same manner as in a normal copper wire manufacturing apparatus, in this example, a compounding means for mixing the raw materials of the wire for manufacturing the above-described negative electrode current collector pin 5, , A casting means for casting, and cutting the ingot obtained by the casting, for example, to a diameter of 26
Cutting means for obtaining 0 mm pellets are provided. Further, for example, induction heating means (not shown) for heating the pellets thus obtained is provided. Then, a hot pressing means 22 is provided for hot extruding the melted raw material to obtain a wire element 21 having a required diameter, for example, the above-mentioned 12.5 mm diameter by extrusion.

Further, a cold drawing means 23 for drawing the wire rod 21 obtained by the hot extrusion means 22 is provided. The cold drawing means 23 has a configuration in which a plurality of dies D ₁ , D ₂ , D _3, ..., D _n for performing cold drawing in order to reduce the diameter of the wire rod sequentially introduced therein are arranged. be able to. Although not shown, a plurality of the cold drawing means 23 for performing the plurality of cold drawing processes can be provided so that the drawing process of the wire rod body 21 can be performed in a plurality of steps. When the plurality of cold wire drawing means 23 are provided, although not shown, for example, a winding means for temporarily winding a wire, an intermediate inspection means, an annealing means, a cleaning means, etc. Can be arranged. In the apparatus of the present invention shown in FIG.
Only three are shown.

In the apparatus of the present invention, cutting means 25 for cutting the surface layer of the final drawn wire rod 24, for example, at the next stage of the final drawing operation of the final drawing step of determining the wire diameter. Is arranged. This makes the thickness 0.05-
Cutting or peeling with 0.3 mm. In this way, a wire 26 for obtaining a negative electrode current collector pin having a desired diameter, for example, 1.45 mm is obtained.

In the example shown in FIG. 2, the cutting means 25 is arranged at the next stage of the final drawing operation.
The cutting means 25 may be located just before the die D _n for performing final drawing work. In this case, the die D _n for performing final drawing operation, be constituted by a die part for performing at least drawing is constituted by, for example, ceramic, diamond-like carbon or the like of the inorganic materials is desired for the purpose of cutting .

A negative electrode current collector pin 5 having a required length is obtained from the wire 26 thus obtained, and the alkaline battery described with reference to FIG. 1 is manufactured.

Next, examples and comparative examples of the alkaline battery according to the present invention will be described. Example 1 The alkaline manganese battery LR6 (AA battery) according to the present invention described with reference to FIG. 1 was manufactured by the method of the present invention using the above-described apparatus of the present invention. In this case, a positive electrode mixture obtained by mixing manganese dioxide and carbon was used as the positive electrode mixture 2, and a gelled negative electrode mixture obtained by mixing a gelling agent and potassium hydroxide with mercury-free zinc powder as the negative electrode mixture 4 Was used. Then, a negative electrode current collector pin 5 thereof, a cutting means 25 described in FIG. 2, a structure disposed just before the die D _n, the drawn wire by the cutting means 25, 0.05
It was constituted by a wire material 26 obtained by cutting, that is, peeling, with a thickness of mm.

[Embodiment 2] In this embodiment, a battery was manufactured by the same method and configuration as in Embodiment 1.
In this embodiment, the cutting means 25, as shown in FIG. 2, was placed in the next stage of the die D _n.

[Embodiment 3] In this embodiment, a battery was manufactured by the same method and configuration as in Embodiment 1,
In this embodiment, the thickness of the cut by the cutting means 25 was set to 0.1 mm.

[Embodiment 4] In this embodiment, a battery was manufactured by the same method and configuration as in Embodiment 2.
In this embodiment, the cut thickness was 0.1 mm.

[Embodiment 5] In this embodiment, a battery was manufactured by the same method and configuration as in Embodiment 1.
In this embodiment, the cutting thickness of the cutting means 25 was set to 0.3 mm.

[Embodiment 6] In this embodiment, a battery was manufactured by the same method and configuration as in Embodiment 2.
In this embodiment, the cut thickness was 0.3 mm.

[Comparative Example 1] In this comparative example, a battery was manufactured by the same method and configuration as in Example 1.
In this comparative example, the cutting means 25, in the configuration of FIG. 2, two front than the die D _n in the final stage the die D
_It was arranged immediately before _n-2 , and its cut thickness was 0.01 mm.

[0038] Comparative Example 2 In this comparative example, although the same method and structure as Comparative Example 1, in the configuration of FIG. 2 the cutting means 25, one front than the die D _n in the final stage the die D _It is placed just before _n-1 and its cutting thickness is 0.01m
m.

Comparative Example 3 In this comparative example, the same method and configuration as in Example 1 were used, but the cut thickness was 0.01 mm. Comparative Example 4 In this comparative example, the same method and configuration as in Example 2 were used, but the cut thickness was 0.01 mm.

Comparative Example 5 In this comparative example, the same method and configuration as in Comparative Example 1 were used, but the cut thickness was 0.3 mm. Comparative Example 6 In this comparative example, the same method and configuration as in Comparative Example 2 were used, but the cut thickness was 0.3 mm.

Table 1 shows the number of batteries in each of the 1,000,000 alkaline manganese batteries of Examples 1 to 6 and Comparative Examples 1 to 6 which leaked after storage at room temperature (20 ° C.) for 2 months.

[0042]

[Table 1]

From the results shown in Table 1, before or after the final drawing step in Examples 1 to 6, ie, the die D _n in FIG.
Before or after the cutting, a cutting means 25 for cutting the surface layer, that is, for peeling, is arranged, and the cut thickness is set to 0.0
When 5 mm to 0.3 mm, compared to Comparative Examples 1 to 6,
The occurrence of the leakage is reduced to about 1/5 to 1/20, and it can be seen that excellent leakage resistance is obtained. This is 0.
This is because impurities, that is, heavy metals, are effectively removed by peeling the skin of 05 mm or more, and impurities having a diameter of up to 0.1 mm are scraped off. And then,
Heavy metals that could not be removed by cutting with a thickness of 0.05 mm have a diameter of 0.1 mm or more, so that hydrogen gas is remarkably generated after battery production, so that a liquid leak occurs early. Therefore, defective products that cause this liquid leakage
By providing an observation period of about two weeks, this can be excluded from the product, so that reliability can be improved.

On the other hand, when the cutting amount is set to 0.01 mm in Comparative Examples 1 to 4, even if the surface layer is cut before and after the final drawing operation, the generation of liquid leakage is 5 to 6 times. Occur,
The leak resistance is inferior. This is because about 5% of heavy metals adhering to the wire have a particle diameter of 0.03 mm or more, and heavy metal adhering to the wire cannot be completely removed by such cutting. Further, it can be seen that the leakage resistance is improved by performing the cutting immediately before or immediately after the final drawing.

From these results, it was found that by setting the cutting thickness to 0.05 mm or more, heavy metals adhering or digging into the wire can be effectively removed.
However, when the cut thickness is increased, workability is reduced. That is, compared to the case where this cutting is not performed,
When cutting 0.3 mm, the speed of wire drawing is about 1
/ 10, and even if cutting with a thickness exceeding this value, there is almost no change in leak resistance, so the cut thickness is selected to be 0.05 mm to 0.3 mm.

Further, as described above, the cut thickness is set to 0.1.
The mechanical strength of the wire 26 having a length of not less than 05 mm, that is, the negative electrode current collecting pin 5 is, for example, about 1.2 times as large as that in the case of 0.01 mm.

As described above, according to the present invention, it is possible to obtain a highly reliable alkaline battery because the leakage resistance is improved, and it is also necessary to increase the strength of the negative electrode current collector pin. Therefore, the handling during the assembly and manufacture is facilitated, and the yield and reliability can be improved in manual and automated assembly.

The battery according to the present invention is not limited to the above-described configuration, but can be applied to an alkaline battery having a negative electrode current collector pin by using a mercury-free negative electrode mixture having various configurations.

[0049]

As described above, in the alkaline battery using the mercury-free negative electrode mixture according to the present invention, the occurrence of liquid leakage was drastically reduced. This is, in the manufacturing process of the wire to obtain the negative electrode current collector pin, in the final drawing operation of the drawing process by drawing, by forming the surface layer with a wire cut to a thickness of 0.05 mm or more, This is because not only impurities such as heavy metals adhering to the surface but also impurities that have penetrated by drawing or the like were surely removed from the wire.

The alkaline battery obtained by the production method of the present invention has improved leakage resistance and strength for the reasons described above. Therefore, in assembling and manufacturing a battery, this negative electrode current collector pin can be inserted into the negative electrode mixture, and in handling such as connection work to the negative electrode terminal plate, a breakage accident can be avoided, with a high yield and high reliability. The alkaline battery can be manufactured.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of an example of an alkaline battery according to the present invention.

FIG. 2 is a schematic configuration diagram of a main part of an example of the device of the present invention.

[Description of Signs] 1 ... Positive electrode can, 2 ... Positive electrode mixture, 3 ... Separator, 4 ... Negative electrode mixture, 5 ... Negative electrode current collector pin, 6 ...
・ Negative electrode terminal plate, 7 ・ ・ ・ Reinforcement plate, 8 ・ ・ ・ Gasket,
Reference numeral 9: bus portion, 10: positive electrode terminal, 11: exterior label, 21: wire body, 22: hot extrusion device, 23: cold wire drawing means, D ₁ , D ₂ , D ₃ , D
_n: die, 24: drawn wire, 25: cutting (peeling) means, 26: wire

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Noriyuki Yamaguchi 1-1, Shimosugishita, Takakura, Hiwada-machi, Koriyama-shi, Fukushima Prefecture Inside Sony Energy Tech Co., Ltd. (72) Hideaki Tokugawa Hiwa, Koriyama-shi, Fukushima Takamachi Tamachi 1-1 Shimosugishita F-term in Sony Energy Tech Co., Ltd. (Reference) 4E070 AA04 AB00 AC02 BF00 EA00 FA02 5H017 AA02 BB06 BB14 BB15 CC14 DD00 HH03

Claims (5)

[Claims] 1. An alkaline battery comprising a mercury-free negative electrode mixture and a negative electrode current collector pin made of copper or a copper alloy inserted therein, wherein the negative electrode current collector pin is a wire for a wire drawing step by drawing. An alkaline battery comprising a wire obtained by cutting a surface layer having a thickness of 0.05 mm to 0.3 mm at least immediately before or after a final wire drawing operation for determining a diameter. 2. A method for manufacturing an alkaline battery, comprising inserting a negative electrode current collector pin made of copper or a copper alloy into a mercury-free negative electrode mixture, wherein the copper or copper alloy for producing the negative electrode current collector pin is provided. In the wire drawing process consisting of a plurality of stages, a wire drawing process by cold drawing, and at least one of immediately before and after the final drawing work in the final drawing process for determining the wire diameter, the cutting work of the wire rod surface layer is performed. A method for manufacturing an alkaline battery, comprising: a cutting operation step to be performed; and a step of cutting the wire rod subjected to the cutting operation to a required length to produce the negative electrode current collector pin. 3. The cutting operation of the surface layer is performed by 0.05 mm
The method for producing an alkaline battery according to claim 2, wherein the process is performed to a thickness of 0.3 mm. 4. An apparatus for manufacturing an alkaline battery comprising a negative electrode current collector made of copper or a copper alloy inserted into a negative electrode mixture containing no mercury, wherein a molten wire material for manufacturing the negative electrode current collector pin is provided. Hot extruding means for hot-extruding a raw material to obtain a wire rod body, and cold drawing means for arranging a plurality of cold drawing dies for drawing the wire rod body obtained by the hot extrusion means And a cutting means of the cold drawing means, which is arranged at least immediately before or after the final drawing die of the cold drawing and performs a cutting operation of a surface layer of the drawn wire material. An apparatus for producing an alkaline battery. 5. The apparatus for manufacturing an alkaline battery according to claim 4, wherein the cutting means performs the surface layer of the drawn wire to a thickness of 0.05 mm to 0.3 mm.