JP4357191B2 - Sealed nickel zinc primary battery and manufacturing method thereof - Google Patents

Description

【００３９】
表１の結果から、正極活物質に二酸化マンガンを０．５質量％添加した正極成形合剤の欠損発生率が、低下し、実用的であることが明かとなった。
【００４０】
（試験例２）
上記試験例１の電池の組み立て方法において、正極成形体を金属缶に収容する際に加圧せずに行ったこと以外試験例１と同様にして、電池を作成した。試験例１及び試験例２によって得られた電池について、１２００ｍＡの電流を３秒間放電させた後７秒間開放する過程を開路電圧が０．９Ｖに低下するまでのパルス放電持続時間を調べた。その結果を表２に示す。
【００４１】
【表２】

【００４２】
表２に見られるように、二酸化マンガン粒子を５０．０質量％添加した正極合剤を用いた電池においては、高負荷パルス放電特性が悪化していることが判明した。
【００４３】
【発明の効果】
以上に説明した本発明の密閉形ニッケル亜鉛一次電池によれば、電池組み立て時の正極成形体の破損に基づく電池性能の低下を防止することができる。
また、本発明の密閉形ニッケル亜鉛一次電池の製造方法によれば、電池性能に優れ、かつ、製造効率の改善された方法を実現することができる。
【図面の簡単な説明】
【図１】 本発明により製造された密閉形アルカリ亜鉛一次電池をＪＩＳ規格ＬＲ６形（単３形）に応用した電池の断面図。
【図２】 本発明の正極成形体の製造工程を示すプロセスフロー図。
【図３】 本発明の製造方法の効果を示すグラフ。
【符号の説明】
１・・・正極缶
２・・・正極合剤
３・・・セパレータ
４・・・ゲル状亜鉛負極
５・・・負極集電棒
６・・・絶縁ガスケット
７・・・リング状金属板
８・・・金属封口板[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sealed nickel zinc primary battery using a nickel high-order oxide as a positive electrode active material and a method for manufacturing the same.
[0002]
[Prior art]
Recently, with the widespread use of portable electronic devices, there is a strong demand for higher battery capacity and improved high-rate discharge characteristics. For positive electrode active materials for alkaline zinc primary batteries, the positive electrode It has been studied to increase the content of the positive electrode active material by reducing the content of carbon-based conductive material that does not serve as a power generation element, such as graphite in the agent. In addition, in order to improve the high rate discharge characteristics, it is considered to use a nickel high-order oxide such as a nickel hydroxide compound as the positive electrode active material instead of manganese dioxide which has been widely used as a positive electrode active material. (See Patent Document 1).
However, in this battery, the high load characteristics required for use in recent portable electronic devices are not sufficient, and improvement of this point is desired. In recent years, as a battery with improved characteristics, a sealed nickel zinc battery using a nickel higher-order oxide as a positive electrode active material has been developed.
[0003]
This sealed alkaline zinc primary battery using a nickel high-order oxide as a positive electrode active material contains a positive electrode material molded in a hollow cylindrical shape in a container serving as a positive electrode, and gels the positive electrode mixture through a separator. A negative electrode material is arranged to constitute a battery.
[0004]
This battery will be described in detail with reference to FIG. FIG. 1 is a sectional view of a JIS standard LR6 type (AA) battery called a so-called inside-out structure (a structure in which the battery can body is on the positive electrode side and the battery lid side is on the negative electrode side).
In FIG. 1, reference numeral 1 denotes a bottomed cylindrical metal can also serving as a positive electrode terminal. A positive electrode mixture containing a positive electrode active material is hollowed inside the metal can 1 using a positive electrode molding die. A positive electrode molded body 2 formed into a cylindrical shape is accommodated so as to contact the inner surface of the metal can 1. A generally known gel-like zinc negative electrode material 4 is already filled in the hollow inside of the positive electrode molded body 2 via a bottomed cylindrical separator 3 made of a nonwoven fabric or the like. A negative electrode current collector rod 5 made of a metal rod is inserted into the negative electrode material 4, and one end of the negative electrode current collector rod 5 protrudes from the surface of the negative electrode material 4 to serve as a ring-shaped metal plate 7 and a cathode terminal. 8 is electrically connected. An insulating gasket 6 made of a double annular polyamide resin is disposed on the inner surface of the metal can 1 serving as the positive electrode and the outer peripheral surface of the protruding portion of the negative electrode current collecting rod 5, and these are insulated. The opening of the metal can 1 is caulked and sealed in a liquid-tight manner.
The positive electrode molded body 2 is usually accommodated in a battery container in a stack of three.
[0005]
By the way, when a mixture containing nickel high-order oxide as a positive electrode active material is formed into a hollow cylindrical positive electrode molded body and inserted into a metal can serving as a cylindrical positive electrode, nickel high-order oxide is used as the positive electrode active material. The positive electrode mixture has a large amount of mixture adhering to the mold when the positive electrode molded body is molded, and the dimensional variation of the molded body is large. Therefore, in a sealed nickel zinc primary battery, the molded body is inserted into the cylindrical metal can in order to increase the adhesion between the metal can and the molded body in order to store the molded body in a predetermined position in the cylindrical metal can. Later, a re-pressurization step is required. In the re-pressurization step after insertion, the core is inserted into the hollow portion of the molded body, and then the molded body is compressed in the height direction with an upper collar. As a result, since the molded body expands in the radial direction, it is in close contact with the inner wall of the positive electrode can and the core rod. Thereafter, the upper collar and the core bar are pulled out to have predetermined dimensions.
[0006]
In this process, in such a sealed nickel-zinc primary battery, when the height dimension before re-pressurization increases due to variation in the molding height, that is, the amount of compression in the height direction during re-pressurization increases, The difference in density in the height direction increases, and the bite to the mold when the core bar is pulled out increases. Thereby, the mixture after re-pressurization is easily cracked, and in the worst case, the mixture is lost. When the defect of the mixture occurs, the weight of the mixture becomes smaller than the target value, and the balance between the amount of the electrolyte and the negative electrode capacity is lost, which causes a decrease in battery performance.
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-048827
[Problems to be solved by the invention]
The present invention provides a sealed nickel-zinc primary battery using the nickel high-order oxide as a positive electrode active material, and can prevent deterioration in battery performance due to damage to the molded positive electrode during battery assembly. A battery and a manufacturing method excellent in battery performance and manufacturing efficiency are realized.
[0009]
[Means for Solving the Problems]
The first aspect of the present invention is a sealed nickel zinc primary battery in which a mixture containing a nickel high-order oxide as a positive electrode active material is formed into a hollow cylindrical positive electrode molded body and inserted into a cylindrical metal can.
It is a sealed nickel-zinc primary battery characterized by adding manganese dioxide having a particle size range of 3 to 7% by mass to 10 to 80 μm with respect to the positive electrode active material.
[0010]
According to a second aspect of the present invention, there is provided a method for producing a sealed nickel zinc primary battery in which a mixture containing a nickel high-order oxide as a positive electrode active material is formed into a hollow cylindrical positive electrode molded body and inserted into a cylindrical metal can.
A positive electrode molding die is filled with a nickel high-order oxide and a mixture containing manganese dioxide having a particle size range of 10 to 80 μm with respect to the nickel high-order oxide and a particle size range of 3 to 7% by mass. A process for producing a hollow cylindrical positive electrode molded body,
Inserting the positive electrode molded body into the metal can and placing the positive electrode molded body in the container without applying pressure;
And a sealed nickel-zinc primary comprising at least a step of assembling a battery by filling a separator and a gel-like negative electrode into a hollow interior of the positive electrode compact, and inserting a negative electrode current collector rod into the gel-like negative electrode It is a manufacturing method of a battery.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
In the sealed nickel zinc primary battery of the present invention, the positive electrode mixture used as the positive electrode is a nickel oxyhydroxide compound or nickel oxyhydroxide compound particles having a cobalt compound deposited on the surface, manganese dioxide particles and necessary In accordance with the above, additive components such as a conductive agent such as carbon particles, a binder, and a lubricant are blended, and this is pressed using a mold and formed into a hollow cylindrical positive electrode molded body.
At this time, by adding manganese dioxide particles to the positive electrode active material made of a nickel higher-order oxide, it is possible to suppress variation in the molding dimensions during the production of the positive electrode molded body. In this case, when the positive electrode mixture is filled in a mold and press-molded, the positive electrode mixture containing a nickel higher-order oxide adheres to the inner surface of the mold by pressurization, and the positive-electrode molded body is taken out from the mold. Later, a phenomenon that remains inside the mold occurs, but when manganese dioxide particles are added, the positive electrode mixture adhering to the mold is scraped off by the manganese dioxide particles, and as a result, the positive electrode mixture adheres to the inside of the mold This is probably because the remaining phenomenon is prevented.
[0012]
Thus, a positive electrode molded body molded using a positive electrode mixture containing manganese dioxide particles has little material loss during molding and little variation in molding dimensions. Therefore, the positive electrode molded body is accommodated in a metal can and reused. When the pressure is applied, the change in the compression ratio is also reduced, and the difference in density in the height direction of the mixture after re-pressurization is reduced. As a result, the failure rate of the positive electrode compact is reduced. In order to prevent depletion of the positive electrode mixture, it is necessary to blend at least 0.5 mass% of manganese dioxide particles with respect to the nickel high-order oxide, and it is more preferable to add 3 mass% or more.
On the other hand, it has also been confirmed that the addition of manganese dioxide reduces the high rate pulse characteristics that are characteristic of a sealed nickel zinc primary battery using a nickel high-order oxide as a positive electrode active material. Specifically, when the current of 1200 mA was discharged for 3 seconds and then opened for 7 seconds, the pulse discharge duration until the open circuit voltage dropped to 0.9 V was compared. Performance down is recognized. Accordingly, the amount of manganese dioxide particles added to the positive electrode mixture is 20% by mass or less, more preferably 7% by mass or less.
[0013]
As described above, in the present invention, the positive electrode active material containing a nickel higher-order oxide is blended with 0.5 to 20% by mass of manganese dioxide particles to effectively damage the positive electrode compact. It is something to prevent.
[0014]
In addition, in the present invention, by adding manganese dioxide particles to the positive electrode active material, the variation in the molding dimension is reduced and the dimensional control in the molding process is facilitated. By simply forming and inserting it into a cylindrical metal can, the metal can and the positive electrode molded body can be sufficiently brought into contact with each other to obtain the targeted battery characteristics. This eliminates the need for a re-pressing process of the positive electrode molded body housed in the metal can, thereby reducing the installation space of the manufacturing facility, reducing power consumption, and reducing the number of management steps. Furthermore, there is virtually no loss of the mixture after re-molding, and it is possible to reduce defective battery performance of the manufactured battery.
[0015]
Hereinafter, embodiments of a battery to which the present invention is applied will be described in detail with reference to the drawings.
(Positive electrode mixture and positive electrode molded body)
The positive electrode molded body of the present invention includes a positive electrode active material composed of a nickel higher-order oxide, manganese dioxide particles, and optionally a carbon-based conductive material as a conductivity-imparting agent, a binder such as polyolefin, and other additive components A positive electrode mixture material made of is formed into granules, and the surface thereof is coated with a lubricant as necessary, and formed into a required shape.
[0016]
As the manganese dioxide particles used in the present embodiment, for example, manganese dioxide particles obtained by crushing electrolytic manganese dioxide produced by electrolysis can be used. As this manganese dioxide, those having a particle size range of 10 to 80 μm are suitable. When this particle size range is less than the above range, it becomes difficult to prevent the raw material from remaining in the mold during the molding of the positive electrode molded body, and the possibility of the molded body being damaged increases. On the other hand, when the particle size range exceeds the above range, the amount of addition necessary for preventing the raw material from remaining in the mold is increased, which is not preferable due to the problem of performance degradation.
[0017]
Examples of the nickel high-order oxide that is the positive electrode active material used in the present invention include nickel hydroxide compounds, that is, nickel hydroxide and nickel oxyhydroxide. Of these, the higher the concentration of nickel oxyhydroxide, the higher the battery voltage and the higher the discharge capacity.
[0018]
Furthermore, it is preferable that the nickel hydroxide-based compound itself as the positive electrode active material is eutectic with zinc or cobalt alone or both because stable discharge can be performed even at a low electrolyte ratio. The amount of zinc or cobalt to be eutectic in the nickel hydroxide compound is preferably in the range of 4.0 to 12.0%. This is because if the amount of zinc is below this range, there will be a problem of lowering the utilization factor, and if it exceeds this range, there will be a problem that the capacity density will decrease due to a decrease in specific gravity.
[0019]
The surface of the nickel hydroxide compound particles is coated with at least one substance selected from cobalt oxyhydroxide, dicobalt trioxide, cobalt monoxide, cobalt hydroxide, metallic nickel, and metallic cobalt. Is desirable. Covering the surface of nickel oxyhydroxide with a substance having high electrical conductivity is preferable because the electrical conductivity of the entire positive electrode is increased, and the discharge capacity and high-rate discharge characteristics are improved. Among these substances, it is preferable to use cobalt oxyhydroxide, metallic nickel, and metallic cobalt because of higher conductivity.
[0020]
The amount of the coating layer is desirably in the range of 2.0 to 6.0 mass% with respect to the positive electrode active material. If the amount of the coating layer exceeds this range, a problem of high cost arises, and if it falls below this range, a problem of reduced current collection arises, which is not preferable.
[0021]
Moreover, the capacity maintenance rate at the time of storage can be improved by adding the compound of Y, Er, Yb, Ca to the positive electrode active material which consists of the said nickel hydroxide type compound. Examples of the compound used in the present invention include metal oxides such as Y ₂ O ₃ , Er ₂ O ₃ , Yb ₂ O ₃ , and metal fluorides such as CaF ₂ . These metal oxides and metal fluorides can be used in the range of 0.1 to 2% by mass with respect to nickel hydroxide as the positive electrode active material. When the compounding amount of the metal oxide or metal fluoride is below the above range, the effect of improving the storage characteristics is not obtained. On the other hand, when the compounding amount exceeds the above range, the amount of the positive electrode active material is relatively reduced. This is not preferable because it is not suitable for high capacity.
[0022]
The method for producing a nickel hydroxide-based compound used in the present invention is described in detail in Japanese Patent Application No. 2001-310323, which is an application of the present applicant, and also in the present invention, the hydroxylation described in this application. It is preferable to use a nickel-based compound.
[0023]
In addition, as the carbon-based conductive material used in the present invention, known carbon-based conductive materials for batteries such as graphite and carbon black can be used, and graphite is particularly preferable.
Furthermore, as the binder used in the present invention, known materials can be used as the binder for the positive electrode mixture of the battery, and among them, polyolefin is preferable. In the present invention, the reason for adding polyolefin is to prevent the binding property of the positive electrode mixture from decreasing and the shape retention of the positive electrode mixture from decreasing when the graphite is reduced in the positive electrode mixture. The positive electrode mixture component can be bound in a smaller amount than graphite. In the present invention, examples of the polyolefin include polyethylene and polypropylene. These polyolefins are added to the positive electrode mixture in the form of particles. The average particle size is preferably in the range of about 5 to 500 μm.
Moreover, a moldability and electroconductivity can be improved by mixing electrolyte solution with a positive electrode mixture at the time of positive electrode mixture shaping | molding.
[0024]
The compounding ratio of the components of the positive electrode mixture material used in the positive electrode mixture is such that the positive electrode mixture: carbon-based conductive material: binder has a mass ratio of 100: 3 to 12: 0.05 to 0.5. preferable.
When the amount of the carbon-based conductive material falls below this range, the discharge capacity is improved, but the conductivity of the positive electrode active material is lowered, the electromotive force is lowered, and the heavy load discharge characteristics are lowered. On the other hand, when it exceeds the above range, the moldability and the molding workability are good, but the discharge capacity is reduced because the amount of the positive electrode active material is limited.
Moreover, when the amount of the binder is below this range, the strength of the molded body is low and the yield is reduced during battery production. On the other hand, when the amount of the binder exceeds this range, the amount of the positive electrode active material is limited, so that the discharge capacity decreases.
[0025]
(Manufacture of cathode mix)
Hereinafter, the production of the positive electrode mixture of the present invention will be described in more detail with reference to FIG. 2 showing the process.
In FIG. 1, 21 to 24 are raw materials used in the present invention, S21 to S27 are steps in the production process, and 25 is a positive electrode mixture obtained. Hereinafter, these steps will be described sequentially.
[0026]
(S21: Dry stirring)
Manganese dioxide particles and carbon-based conductive material powder are added to the nickel high-order oxide, which is the positive electrode active material, and dry-stirred with a universal stirring mixer.
[0027]
(S22: Wet stirring)
An electrolyte solution is added to 100 parts by mass of the mixed powder obtained by the dry agitation, and wet agitation is performed with a universal agitation mixer. By this step, the positive electrode mixture component powders mixed by the dry stirring are adhered to each other and can be molded. The amount of the electrolyte used in this step is about 2 to 7 parts by mass with respect to 100 parts by mass of the positive electrode mixture component.
[0028]
(S23: Compression)
The positive electrode mixture blended in the above process is then compressed and pressed by a roll press called a roller compactor to increase the packing density for granulation. This roller compactor supplies a positive electrode mixture between twin rolls and pressurizes it to increase the packing density. The compressive stress is 0.5 × 10 4 to 5 × 10 4 N / cm obtained by dividing the applied force by the roller width. In the range of 1.5 × 10 4 to 3.5 × 10 4 N / cm is more preferable. Thereby, a plate-like object to be compressed having a thickness of 1 mm or less is obtained.
[0029]
(S24: Crushing)
The positive electrode mixture treated by the above process is in the form of a compressed mass. In order to produce a molded body using this, it is necessary to granulate once into a granule. Therefore, the crushing process by the granulator using the twin roll which has the processus | protrusion mutually fitted on the roll surface is performed. The positive electrode mixture formed into a compacted mass is crushed into granules by passing through this granulator.
[0030]
(S25: sieving)
Next, it classifies with a 14-60 mesh automatic sieving machine, and selects and classifies the granular positive electrode mixture having a particle size of about 250-1180 μm.
[0031]
(S26: mixing and stirring)
A predetermined amount of a lubricant such as ethylene bis-saturated aliphatic amide powder is added to the granular mixture obtained by the above process, if desired, and mixed and stirred. Through the steps so far, a granular mixture in which ethylenebis saturated fatty acid amide powder is adhered to the surface of the granular positive electrode mixture is produced.
[0032]
(S27: Molding)
The granular positive electrode mixture particles granulated in the above process are then formed into a positive electrode mixture using a mold.
The positive electrode mixture of the inside-out type battery has a hollow cylindrical shape, has a central mandrel, fills the positive electrode mixture particles in a cylindrical mold having a required volume, and forms a male mold. Molding is performed by press-fitting. The molding pressure at this time is preferably a pressure of 0.5 × 10 8 to 9.8 × 10 8 Pa. When the molding pressure falls below the above range, the required filling density of the positive electrode mixture cannot be obtained, and it becomes difficult to ensure the contact between the particles. Therefore, when the battery is used, a predetermined discharge capacity cannot be obtained. On the other hand, when the molding pressure exceeds the above range, the electrolytic solution hardly penetrates into the positive electrode mixture, and the utilization rate is lowered.
[0033]
(S28: Battery assembly process)
Next, a sealed battery is manufactured using the positive electrode molded body obtained through the above steps. First, the positive electrode molded body is stored in a metal can. At this time, pressure may be applied to the positive electrode molded body to improve the adhesion between the positive electrode can and the positive electrode molded body. However, the positive electrode molded body manufactured in the above process has improved dimensional accuracy, so Even if it is inserted into a metal can without applying pressure, the metal can and the positive electrode molded body are sufficiently adhered, and the necessary electrical connection can be obtained. Furthermore, the possibility that the positive electrode molded body is damaged by this pressurization increases, and it is considered that the battery performance is lowered by the pressurization. Therefore, it is not necessary to pressurize when the positive electrode molded body is accommodated in the metal can. .
Next, as seen in FIG. 1, a bottomed cylindrical separator paper is placed in the central space of the positive electrode molded body, and a gelled negative electrode is filled therein. Then, a negative electrode current collector rod is inserted into the gel negative electrode, and thereafter, a ring-shaped metal plate, a metal sealing plate, an insulating gasket, etc. are arranged at predetermined positions, and the opening end of the metal can is caulked and sealed to provide a battery. Can be assembled.
[0034]
【Example】
(Test Example 1)
First, manganese dioxide particles in an amount shown in Table 1 and 7% by mass of graphite were blended with nickel oxyhydroxide, which is a nickel higher-order oxide, to granulate a granular mixture. This was filled into a cylindrical mold having a size for JIS standard LR6 type (AA size) and pressure molded to obtain a positive electrode molded body. This process was repeated a plurality of times, the height of the positive electrode molded body obtained was measured, and the relationship between the number of times the molding process was performed and the height of the positive electrode molded body was examined. The result is shown in FIG.
[0035]
From the results of FIG. 3, it was revealed that the rate of change in the height of the molded body was significantly reduced in the positive electrode molded body using the positive electrode mixture to which 0.5% by mass or more of manganese dioxide particles were added.
[0036]
Moreover, the positive electrode molded body described above is accommodated in the bottomed cylindrical metal can 1 for JIS standard LR6 type (AA) that also serves as the positive electrode terminal, and the core rod is inserted into the hollow portion of the positive electrode molded body, The positive electrode molded body was pressed against the can wall of the metal can 1 by pressurizing with an upper arm to obtain a positive electrode molding mixture 2. Furthermore, a bottomed cylindrical separator 3 made of a non-woven fabric of acetalized polyvinyl alcohol fibers was inserted into the hollow part of the positive electrode molding mixture 2. The separator 3 was filled with a gelled negative electrode, and a JIS standard LR6 type (AA) alkaline battery shown in FIG. 1 was assembled.
[0037]
About the battery obtained by the said process, the incidence rate of the defect | deletion of a positive electrode molded object was investigated. The results are also shown in Table 1.
[0038]
[Table 1]

[0039]
From the results shown in Table 1, it was revealed that the defect generation rate of the positive electrode molding mixture in which 0.5% by mass of manganese dioxide was added to the positive electrode active material was lowered and practical.
[0040]
(Test Example 2)
A battery was produced in the same manner as in Test Example 1 except that in the battery assembly method of Test Example 1 described above, the positive electrode compact was not pressurized when housed in a metal can. The batteries obtained in Test Example 1 and Test Example 2 were examined for pulse discharge duration until the open circuit voltage dropped to 0.9 V in the process of discharging a current of 1200 mA for 3 seconds and then opening for 7 seconds. The results are shown in Table 2.
[0041]
[Table 2]

[0042]
As can be seen from Table 2, in the battery using the positive electrode mixture to which 50.0% by mass of manganese dioxide particles were added, it was found that the high-load pulse discharge characteristics were deteriorated.
[0043]
【The invention's effect】
According to the sealed nickel zinc primary battery of the present invention described above, it is possible to prevent the battery performance from being deteriorated due to the damage of the positive electrode molded body during battery assembly.
Moreover, according to the manufacturing method of the sealed nickel zinc primary battery of this invention, the method which was excellent in battery performance and improved manufacturing efficiency is realizable.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a battery in which a sealed alkaline zinc primary battery manufactured according to the present invention is applied to JIS standard LR6 type (AA).
FIG. 2 is a process flow diagram showing manufacturing steps of the positive electrode molded body of the present invention.
FIG. 3 is a graph showing the effect of the production method of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Positive electrode can 2 ... Positive electrode mixture 3 ... Separator 4 ... Gel-like zinc negative electrode 5 ... Negative electrode collector rod 6 ... Insulating gasket 7 ... Ring-shaped metal plate 8 ...・ Metal sealing plate

Claims (2)

In a sealed nickel zinc primary battery in which a mixture containing a nickel high-order oxide as a positive electrode active material is formed into a hollow cylindrical positive electrode molded body and inserted into a cylindrical metal can,
A sealed nickel-zinc primary battery, wherein manganese dioxide having a particle size range of 3 to 7% by mass of 10 to 80 μm is added to the positive electrode active material. In a method for producing a sealed nickel-zinc primary battery in which a mixture containing a nickel high-order oxide as a positive electrode active material is formed into a hollow cylindrical positive electrode molded body and inserted into a cylindrical metal can,
A positive electrode molding die is filled with a nickel high-order oxide and a mixture containing manganese dioxide having a particle size range of 10 to 80 μm with respect to the nickel high-order oxide and a particle size range of 3 to 7% by mass. A process for producing a hollow cylindrical positive electrode molded body,
Inserting the positive electrode molded body into the metal can and placing the positive electrode molded body in the container without applying pressure;
And a sealed nickel-zinc primary comprising at least a step of assembling a battery by filling a separator and a gel-like negative electrode into a hollow interior of the positive electrode compact, and inserting a negative electrode current collector rod into the gel-like negative electrode Battery manufacturing method.

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