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WO2018123123A1 - Pile sèche alcaline - Google Patents

Pile sèche alcaline Download PDF

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Publication number
WO2018123123A1
WO2018123123A1 PCT/JP2017/027826 JP2017027826W WO2018123123A1 WO 2018123123 A1 WO2018123123 A1 WO 2018123123A1 JP 2017027826 W JP2017027826 W JP 2017027826W WO 2018123123 A1 WO2018123123 A1 WO 2018123123A1
Authority
WO
WIPO (PCT)
Prior art keywords
negative electrode
boss
gasket
opening
current collector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2017/027826
Other languages
English (en)
Japanese (ja)
Inventor
嘉晃 工藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Publication of WO2018123123A1 publication Critical patent/WO2018123123A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/191—Inorganic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/198—Sealing members characterised by the material characterised by physical properties, e.g. adhesiveness or hardness
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to an alkaline battery, and more particularly to a gasket structure provided in a sealing unit that seals an opening of a battery case.
  • Alkaline batteries include a battery case having an opening, a power generation element housed in the battery case, and a sealing unit that seals the opening of the battery case.
  • the sealing unit includes a negative electrode terminal plate, a negative electrode current collector bonded to the negative electrode terminal plate, and a gasket.
  • the gasket includes a boss portion that allows the negative electrode current collector to pass therethrough, an outer peripheral portion that is in contact with the opening end portion of the battery case, and a connecting portion that connects the boss portion and the outer peripheral portion.
  • a thin wall portion having an explosion-proof function is formed in an inner peripheral region adjacent to the boss portion of the connecting portion.
  • the battery internal pressure may rise abnormally.
  • the connecting portion swells toward the negative terminal plate, tension is applied to the thin portion, and the thin portion is broken. Thereby, the gas generated in the battery is discharged out of the battery through a gas vent hole formed in the negative electrode terminal plate. Therefore, the safety of the battery is ensured.
  • the connecting portion In order for the thin-walled portion to break, a space is required for the connecting portion to bulge toward the negative electrode terminal plate.
  • the softened boss may be pushed up toward the negative terminal plate against the frictional force with the negative electrode current collector. As a result, the distance between the connecting portion and the negative electrode terminal plate becomes short, and comes into contact with the negative electrode terminal plate before the connecting portion sufficiently swells, making it difficult to break the thin portion.
  • Patent Document 1 prevents the boss portion from being embedded in the flange portion by setting the ratio of the outer diameter of the boss portion of the gasket and the outer diameter of the flange portion of the negative electrode current collector to 4.0 or less. Yes. Thereby, the distance between the negative electrode terminal plate and the connecting portion of the gasket is maintained, and the connecting portion can sufficiently swell.
  • the connecting portion In order to secure a sufficient space for the connecting portion to bulge toward the negative electrode terminal plate, it is desirable to limit the movement of the softened boss portion toward the negative electrode terminal plate. From the viewpoint of increasing the frictional force between the boss portion and the negative electrode current collector, it is considered that the larger the boss portion height of the gasket, the more advantageous.
  • the height of the boss part is set to 5 mm or more, for example.
  • One aspect of the present disclosure includes a battery case having an opening, a power generation element housed in the battery case, and a sealing unit that seals the opening.
  • the sealing unit includes a negative electrode terminal plate, a negative electrode current collector bonded to the negative electrode terminal plate, and a gasket.
  • the gasket includes a boss portion through which the negative electrode current collector passes, an outer peripheral portion in contact with an opening end portion of the battery case, and a connecting portion that connects the boss portion and the outer peripheral portion.
  • the inner peripheral region adjacent to the boss portion of the connecting portion has a thin wall portion having an explosion-proof function, and the height of the boss portion is 1.5 mm or more and 3.0 mm or less, and the center of the boss portion It is related with the alkaline dry battery whose difference of the internal diameter of a part and the minimum internal diameter of the upper-lower-end part of the said boss
  • hub part is 0.03 mm or less.
  • the height of the boss part of the gasket is set to 3.0 mm or less, and the difference between the inner diameter of the central part of the boss part and the minimum inner diameter of the upper and lower end parts is set to 0.03 mm or less.
  • the joint becomes stronger, the movement of the boss to the negative terminal plate side is restricted, and the explosion-proof function by the thin part of the gasket is stabilized. Further, since the volume of the entire gasket is reduced, more power generation elements can be accommodated in the battery case, and high capacity can be achieved.
  • FIG. 1A is a sectional view showing a general mold B for manufacturing a gasket.
  • FIG. 1B is a cross-sectional view showing a gasket manufactured with the mold of FIG. 1A.
  • FIG. 2A is a cross-sectional view showing an improved mold B for manufacturing a gasket.
  • FIG. 2B is a cross-sectional view showing a gasket manufactured with the mold of FIG. 2A.
  • FIG. 3A is a plan view of a gasket in which ribs are formed on the opening-side surface of the connecting portion.
  • 3B is a cross-sectional view of the gasket of FIG. 3A taken along line IIIB-IIIB.
  • FIG. 4 is a half sectional view showing an example of the internal structure of the alkaline dry battery according to the embodiment of the present invention.
  • FIG. 5 is a partial cross-sectional view showing an example of the structure of the sealing unit according to the embodiment of the present invention.
  • the alkaline dry battery includes a battery case having an opening, a power generation element housed in the battery case, and a sealing unit that seals the opening of the battery case.
  • the sealing unit includes a negative electrode terminal plate, a negative electrode current collector bonded to the negative electrode terminal plate, and a gasket.
  • the gasket includes a boss portion that penetrates the negative electrode current collector, an outer peripheral portion that is in contact with an end portion of the opening of the battery case, and a connecting portion that connects the boss portion and the outer peripheral portion.
  • a thin wall portion having an explosion-proof function is formed in an inner peripheral region adjacent to the boss portion of the connecting portion.
  • the height of the boss portion is 1.5 mm or more and 3.0 mm or less, and the difference between the inner diameter of the central portion of the boss portion and the minimum inner diameter of the upper and lower ends of the boss portion (hereinafter referred to as an inner diameter difference ⁇ D). ) Is limited to 0.03 mm or less.
  • the upper and lower end portions of the boss portion correspond to both end portions of the boss portion in the height direction of the alkaline dry battery. Whichever may be considered as the upper end or the lower end, in the following illustrated example, the side on which the negative electrode terminal plate is disposed is the upper end.
  • the inner diameter at the center of the boss is the inner diameter at the center in the height direction of the boss (that is, half height).
  • the inner diameter of the boss portion is usually minimized in the vicinity of the upper end portion or the lower end portion of the boss portion.
  • an annular protrusion due to the gate portion of the mold may be formed on the inner peripheral edge of the end surface of the boss portion. In this case, what is necessary is just to measure the height which excluded the annular protrusion at the intermediate point between the inner wall and the outer wall of the boss part.
  • the upper end portion of the boss portion is a region 30% of the height of the boss portion from the upper end surface of the boss portion, and the lower end portion of the boss portion is 30% of the height of the boss portion from the lower end surface of the boss portion. It is an area. That is, both end portions excluding the central region 40% of the boss portion are upper and lower end portions of the boss portion.
  • the height of the boss portion is set to 3.0 mm or less, resin sink is less likely to occur, so that the inner diameter difference ⁇ D can be easily limited to 0.03 mm or less.
  • the height of the boss part exceeds 3 mm, it is generally difficult to reduce the inner diameter difference ⁇ D to 0.03 mm or less. For example, if the height of the boss part is 5 mm or more, the inner diameter difference ⁇ D exceeds 0.05 mm.
  • the height of the boss may be 3.0 mm or less, but is preferably 2.5 mm or less from the viewpoint of reducing the entire gasket volume as much as possible and accommodating more power generation elements in the battery case. 0.0 mm or less is more preferable. However, if the height of the boss part is smaller than 1.5 mm, the frictional force between the boss part and the negative electrode current collector is drastically reduced, and the movement of the boss part toward the negative electrode terminal plate is limited when the gasket is softened. It becomes difficult.
  • the inner diameter difference ⁇ D can be more easily limited to 0.03 mm or less by slightly narrowing the central portion of the cylindrical core pin that molds the hollow of the boss portion. From the viewpoint of making the inner diameter difference ⁇ D as close to 0 as possible, it is preferable that the central portion of the core pin is made 0.3% to 2.0% smaller than the maximum diameter of the core pin. Even when the center portion of the core pin is thinned, the inner diameter D c of the center portion and the minimum inner diameter D t of the upper end portion and the lower end portion of the boss portion often satisfy the relationship of D c > D t , but D c ⁇ the relationship of D t may be satisfied. From the viewpoint of further strengthening the combination of the boss portion and the negative electrode current collector, the inner diameter difference ⁇ D is preferably 0.02 mm or less, and more preferably 0.01 mm or less.
  • a rib (hereinafter referred to as a reinforcing rib) extending from the boss portion side to the outer peripheral portion side may be formed on the opening-side surface of the gasket connecting portion.
  • a plurality of reinforcing ribs are preferably formed. At this time, the plurality of reinforcing ribs are preferably formed so as to divide the opening-side surface of the connecting portion into two or more regions, and the sizes of the two or more regions are preferably equal.
  • two reinforcing ribs may be formed so as to divide the opening-side surface of the connecting portion into two equal parts, and three or four such that the opening-side surface of the connecting portion is divided into three equal parts or four equal parts.
  • the reinforcing ribs may be formed radially.
  • the angle (hereinafter referred to as the skirt angle) ⁇ formed by the opening side surface of the inner peripheral region of the connecting portion and the height direction of the boss portion is preferably 45 degrees or more.
  • the greater the skirt angle ⁇ the greater the resistance when the boss moves to the negative terminal plate side when the gasket is softened.
  • the skirt angle ⁇ is more preferably 50 degrees or more, and may be 90 degrees or more.
  • the upper limit of the skirt angle ⁇ is about 130 degrees, preferably 120 degrees or less, from the viewpoint of stabilizing the explosion-proof function due to the thin-walled portion of the gasket. When the skirt angle ⁇ exceeds 130 degrees, it may be difficult to secure a space for the connecting portion to sufficiently swell.
  • the negative electrode current collector is pulled out from the boss portion of the gasket.
  • the tip of the negative electrode current collector is heated at 70 ° C. for 3 seconds to soften the sealant, and then the negative electrode current collector is removed. Just pull it out.
  • the gasket thus isolated is placed in a constant temperature bath at 35 ° C. and a relative humidity of 90% and left for 24 hours. Accordingly, the gasket is heated and humidified under mild conditions, the residual stress of the gasket is released, and the state of the gasket before the sealing unit is assembled is reproduced. Thereafter, a cross-sectional photograph of the boss part may be taken by CT scan, and the inner diameter of each part may be measured.
  • FIG. 1A is a cross-sectional view showing an example of a general mold structure.
  • the mold includes an upper mold 11 ⁇ / b> A, a lower mold 11 ⁇ / b> B, and a cylindrical core pin 13.
  • the diameter of the portion that molds the hollow of the boss portion of the core pin 13 is constant.
  • the core pin 13 is inserted from a through hole provided in the lower mold 11B, and is arranged so as to be planted in the center of the boss portion forming space portion 14.
  • the upper mold 11 ⁇ / b> A is formed with a gate portion 12 that opens toward the end of the core pin 13. The molten resin is injected from the gate portion 12 and filled in the order of the boss portion forming space portion 14, the connecting portion forming space portion 16, and the outer peripheral portion forming space portion 17.
  • FIG. 1B is a cross-sectional view showing an example of a gasket manufactured using a general mold as described above.
  • the gasket 7 includes a cylindrical boss portion 7a having a hollow 13h into which the negative electrode current collector 6 is inserted, an outer peripheral portion 7b in contact with the opening end of the battery case, and a connecting portion that connects the boss portion 7a and the outer peripheral portion 7b. 7c.
  • the mold as described above causes considerable resin sink because the diameter of the core pin 13 is constant in addition to the height of the boss forming space 14 being large. Therefore, the inner diameter of the central portion of the boss portion 7a becomes 0.05 mm or more larger than the minimum inner diameter of the upper and lower end portions due to resin sink.
  • the gasket 7 is formed with an annular protrusion 7e corresponding to the gate portion 12 on the inner peripheral edge of the end surface of the boss portion 7a.
  • the height H 0 of the boss portion 7a excluding the annular protrusion 7e corresponds to the height of the boss portion forming space portion 14 and is 5 mm or more. Therefore, it can also hinder further increase in capacity of the battery.
  • FIG. 2A is a cross-sectional view showing an example of an improved mold structure.
  • FIG. 2B shows a cross-sectional view of an example of a gasket manufactured with an improved mold. Components corresponding to those in FIGS. 1A and 1B are denoted by the same reference numerals.
  • the height H 1 of the improved boss forming space 14 of the mold is designed to be 1.5 mm or more and 3.0 mm or less.
  • the core pin 13 has a substantially cylindrical shape with a central portion slightly narrower than the upper and lower end portions.
  • the height H 1 excluding the annular projection 7e is, corresponding to the height of the boss portion forming the space portion 14, 1.5 mm or more, 3. 0 mm or less. Further, the difference ⁇ D between the inner diameter of the central portion of the boss portion 7a and the minimum inner diameter of the upper and lower end portions can be easily limited to 0.03 mm or less.
  • the skirt angle ⁇ is formed by the surface on the opening side of the thin portion 8 in the cross section of the gasket and the region on the lower side (power generation element side) side of the connecting portion 7c of the peripheral surface of the boss portion 7a. It is calculated as an angle.
  • FIG. 3A shows a plan view of another example of a gasket manufactured with an improved mold.
  • FIG. 3B is a sectional view of the gasket taken along line IIIB-IIIB.
  • four reinforcing ribs 7d are radially formed on the opening-side surface of the connecting portion.
  • the difference in the inner diameter of the boss portion 7a is emphasized. It is shown that the inner diameter of the central portion is the largest, and the upper end portion and the lower end portion each have a minimum diameter.
  • FIG. 4 is a half sectional view showing an example of the internal structure of the alkaline dry battery according to the embodiment of the present invention.
  • FIG. 5 is a partial cross-sectional view showing an example of the structure of the sealing unit according to the embodiment.
  • the battery case 1 is obtained, for example, by press-molding a nickel-plated steel sheet into a predetermined shape.
  • a conductive film may be formed on the inner surface of the battery case 1.
  • the opening of the battery case 1 is sealed with a sealing unit 9 in which a negative electrode terminal plate 5, a negative electrode current collector 6, and a gasket 7 are assembled together.
  • the negative electrode terminal plate 5 is obtained, for example, by press-molding a nickel-plated steel plate or a tin-plated steel plate into a predetermined shape.
  • the peripheral edge of the negative electrode terminal plate 5 is provided with a gas vent hole (not shown) for releasing gas to the outside when the explosion-proof function by the thin portion 8 of the gasket 7 is activated.
  • a flange 6 a is formed at the end of the negative electrode current collector 6, and the flange 6 a is joined to the negative terminal plate 5 by welding.
  • the negative electrode current collector 6 is obtained, for example, by pressing a brass wire into a nail shape having a predetermined dimension.
  • the outer peripheral surface of the battery case 1 is covered with an exterior label 10.
  • the negative electrode current collector 6 passes through the boss portion 7a of the gasket 7.
  • the outer peripheral portion 7 b of the gasket is in contact with the opening end portion of the battery case 1 and is caulked on the peripheral edge of the negative electrode terminal plate 5.
  • An annular connecting portion 7c that connects the boss portion 7a and the outer peripheral portion 7b has a thin-walled portion 8 having an explosion-proof function in the inner peripheral region near the boss portion 7a.
  • the minimum thickness in the thin portion 8 is set to, for example, 0.10 mm to 0.35 mm.
  • a polyamide resin such as 6,6-nylon is used as the material of the gasket 7, for example.
  • the inner diameter and outer diameter of the boss 7a can be tightened to such an extent that alkaline electrolyte does not leak when the negative electrode current collector 6 is fixed through the hollow 13h (FIG. 2B), and the boss 7a. Designed to prevent cracking. From the above viewpoint, the ratio (D i / D c ) between the body diameter (D i ) of the negative electrode current collector 6 and the inner diameter (D c ) of the central portion of the boss portion 7a is, for example, 1.02 ⁇ D i / D c ⁇ 1.20 is set.
  • the body diameter of the negative electrode current collector 6 is preferably 2.0 mm or less, and more preferably 1.8 mm or less, for example.
  • the trunk diameter of the negative electrode current collector 6 is preferably 1.1 mm or more, and more preferably 1.15 mm or more.
  • the outer diameter of the boss is preferably 3.0 mm to 4.5 mm, for example.
  • the outer diameter of the outer peripheral portion 7b of the gasket is determined by the battery size.
  • the surface roughness (R max ) of the negative electrode current collector 6 is For example, it may be 0.3 to 3.0 ⁇ m.
  • tin may be formed a plating layer such as indium, but since it is small surface roughness (R max) is, may not form a plating layer.
  • the negative electrode current collector 6 is made of brass, but the copper content of brass may be reduced. For example, when the copper content of brass is 50 to 60% by mass or less, the electrical conductivity of the negative electrode current collector 6 decreases, and the heat generation of the negative electrode current collector increases when the battery is misused. Even in such a case, since the coupling between the boss portion 7a and the negative electrode current collector 6 is strong, the movement of the boss portion toward the negative electrode terminal plate is sufficiently limited.
  • a sealant may be interposed between the negative electrode current collector and the boss portion.
  • the sealant makes it difficult for leakage of the alkaline electrolyte from between the negative electrode current collector and the boss portion.
  • a silicone resin, a fluororesin, an epoxy resin to which polyamidoamine is added, or the like can be used.
  • the type of the alkaline battery is not particularly limited.
  • the above-described sealing unit is used. The effect of stabilizing the explosion-proof function is increased.
  • the positive electrode 2 for example, a molded body of a mixture containing a positive electrode active material, a conductive agent, and an alkaline electrolyte is used.
  • a binder such as polyethylene powder and a lubricant such as stearate may be added to the mixture.
  • the positive electrode active material manganese dioxide powder, nickel oxyhydroxide powder, or the like is used.
  • the conductive agent graphite powder or the like is used.
  • the gelled negative electrode 3 for example, a mixture containing a negative electrode active material, an alkaline electrolyte, and a gelling agent is used.
  • Zinc alloy powder is used for the negative electrode active material.
  • the gelling agent sodium polyacrylate or the like is used.
  • a metal compound having high hydrogen overvoltage such as indium or bismuth or a surfactant may be added to the mixture.
  • a nonwoven fabric mainly composed of polyvinyl alcohol fiber and rayon fiber is used.
  • the positive electrode 2, the gelled negative electrode 3 and the separator 4 each contain an alkaline electrolyte.
  • an alkaline electrolyte for example, an aqueous solution containing 30 to 40% by mass of potassium hydroxide and 1 to 3% by mass of zinc oxide is used.
  • an AAA alkaline battery having a structure as shown in FIG. 4 was produced.
  • Example 1 Production of Sealing Unit Gasket 7 was produced by injection molding 6,6-nylon into a predetermined shape using a plurality of types of molds. The height H of the boss portion 7a of the gasket 7 and the difference ⁇ D between the inner diameter of the central portion of the boss portion 7a and the minimum inner diameter of the upper and lower end portions were changed as shown in Table 1.
  • the inner diameter D c at the center of the boss 7 a and the minimum inner diameter D t at the upper and lower ends of the boss 7 a satisfied the relationship of D c > D t .
  • the target of the inner diameter of the central portion of the boss portion 7a of the gasket 7 was set to 1.10 mm.
  • No reinforcing ribs were formed on the opening-side surface of the connecting portion 7c of the gasket 7.
  • the skirt angle ⁇ was 45 degrees.
  • a negative electrode current collector 6 was produced by processing brass having a copper content of 58 mass% into a nail shape having a total length of 30 mm and a body diameter of 1.20 mm. A plating layer was not formed on the surface of the negative electrode current collector 6, and the surface roughness (R max ) was 1.0 ⁇ m.
  • a negative electrode terminal plate 5 was produced by pressing a nickel-plated steel plate having a thickness of 0.4 mm into a predetermined shape, and the flange portion 6 a of the negative electrode current collector 6 was welded to the negative electrode terminal plate 5. Then, the negative electrode current collector 6 was press-fitted into the hollow 13 h of the boss 7 a of the gasket 7 to assemble the sealing unit 9.
  • Electrolytic manganese dioxide powder having an average particle diameter of 35 ⁇ m and graphite powder having an average particle diameter of 15 ⁇ m are mixed at a mass ratio of 94: 6, and 2 parts by mass of alkaline electrolyte is added to 100 parts by mass of the mixture. After sufficiently stirring, compression molding was performed to obtain a flaky positive electrode mixture. The flaky positive electrode mixture was pulverized into granules and then pressure-molded into hollow cylindrical pellets.
  • an aqueous solution containing 35% by mass of potassium hydroxide and 2% by mass of zinc oxide was used as the alkaline electrolyte.
  • the positive electrode 2 was inserted into the battery case 1, and the positive electrode 2 was brought into close contact with the inner wall of the battery case 1 with a pressing jig.
  • a bottomed cylindrical separator 4 is disposed in the hollow of the positive electrode 2.
  • the separator 4 a nonwoven fabric mainly composed of polyvinyl alcohol fiber and rayon fiber was used.
  • the gelled negative electrode 3 was filled into the separator 4.
  • the outer peripheral part of the gasket of the sealing unit was disposed in the vicinity of the opening of the battery case 1, and the opening end of the battery case 1 was folded inward to seal it, thereby completing the battery.
  • Example 2 The length of the boss portion 7a is the same as that of the first embodiment except that two or four reinforcing ribs 7d extending from the boss portion side to the outer peripheral portion side are formed on the opening side surface of the coupling portion 7c of the gasket 7.
  • Example 3 A battery comprising a gasket 7 having a boss 7a length of 1.5 mm and an inner diameter difference ⁇ D of 0.03 mm, as in Example 1, except that the skirt angle of the gasket 7 was changed as shown in Table 3. This was prepared and subjected to a severe short-circuit test at 60 ° C. as in Example 2. The results are shown in Table 3.
  • the explosion-proof function is stabilized by setting the height of the boss portion 7a to 1.5 mm or more and 3.0 mm or less and limiting the inner diameter difference ⁇ D to 0.03 mm or less. Further, it was shown that the explosion-proof function is stabilized even in a harsher environment by providing the gasket 7 with the reinforcing rib 7d or increasing the skirt angle.
  • the alkaline dry battery according to the embodiment of the present invention is useful as a power source for various electronic devices because it has an excellent explosion-proof function and can be increased in capacity.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

La présente invention concerne une pile sèche alcaline pourvue d'un boîtier de pile ayant une ouverture, d'un élément de production d'énergie logé à l'intérieur du boîtier de pile, et d'une unité d'étanchéité pour sceller l'ouverture. L'unité d'étanchéité est pourvue d'une carte de borne d'électrode négative, d'un collecteur de courant d'électrode négative lié à la carte de borne d'électrode négative, et d'un joint d'étanchéité. Le joint d'étanchéité est pourvu d'une partie de bossage qui perce le collecteur de courant d'électrode négative, d'une partie de périphérie externe qui vient en contact avec la partie d'extrémité de l'ouverture du boîtier de cellule, et d'une partie de couplage qui couple la partie de bossage et la partie de périphérie externe Sur une région circonférentielle interne adjacente à la partie bossage de la partie de couplage, se trouve une partie à paroi mince ayant une fonction antidéflagrante, la hauteur de la partie bossage est de 1,5 à 3,0 mm, et la différence entre le diamètre interne de la partie centrale de la partie de bossage et le diamètre interne minimal des parties d'extrémité supérieure et inférieure est de 0,03 mm ou moins.
PCT/JP2017/027826 2016-12-28 2017-08-01 Pile sèche alcaline Ceased WO2018123123A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-254834 2016-12-28
JP2016254834A JP2020030887A (ja) 2016-12-28 2016-12-28 アルカリ乾電池

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WO2018123123A1 true WO2018123123A1 (fr) 2018-07-05

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113169710A (zh) * 2018-12-13 2021-07-23 学校法人帝京大学 太阳能电池模块内的太阳能电池单元的工作电压的推测方法及太阳能电池单元工作电压推测系统
US11817591B2 (en) 2020-05-22 2023-11-14 Duracell U.S. Operations, Inc. Seal assembly for a battery cell

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000003698A (ja) * 1998-06-15 2000-01-07 Sony Corp ガスケットとガスケットの成形方法及びこのガスケットを用いた円筒形アルカリ電池
JP2002516025A (ja) * 1997-06-25 2002-05-28 エヴァレディー バッテリー カンパニー インコーポレイテッド ガリヴァーニ電池用ｖ型ガスケット
JP2005332613A (ja) * 2004-05-18 2005-12-02 Matsushita Electric Ind Co Ltd アルカリ一次電池
JP2009158449A (ja) * 2007-08-23 2009-07-16 Panasonic Corp アルカリ乾電池
JP2010080184A (ja) * 2008-09-25 2010-04-08 Panasonic Corp 乾電池
WO2011027502A1 (fr) * 2009-09-02 2011-03-10 パナソニック株式会社 Pile sèche alcaline
WO2014034017A1 (fr) * 2012-08-28 2014-03-06 パナソニック株式会社 Pile alcaline

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002516025A (ja) * 1997-06-25 2002-05-28 エヴァレディー バッテリー カンパニー インコーポレイテッド ガリヴァーニ電池用ｖ型ガスケット
JP2000003698A (ja) * 1998-06-15 2000-01-07 Sony Corp ガスケットとガスケットの成形方法及びこのガスケットを用いた円筒形アルカリ電池
JP2005332613A (ja) * 2004-05-18 2005-12-02 Matsushita Electric Ind Co Ltd アルカリ一次電池
JP2009158449A (ja) * 2007-08-23 2009-07-16 Panasonic Corp アルカリ乾電池
JP2010080184A (ja) * 2008-09-25 2010-04-08 Panasonic Corp 乾電池
WO2011027502A1 (fr) * 2009-09-02 2011-03-10 パナソニック株式会社 Pile sèche alcaline
WO2014034017A1 (fr) * 2012-08-28 2014-03-06 パナソニック株式会社 Pile alcaline

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113169710A (zh) * 2018-12-13 2021-07-23 学校法人帝京大学 太阳能电池模块内的太阳能电池单元的工作电压的推测方法及太阳能电池单元工作电压推测系统
CN113169710B (zh) * 2018-12-13 2024-03-08 学校法人帝京大学 太阳能电池模块内的太阳能电池单元的工作电压的推测方法及太阳能电池单元工作电压推测系统
US11936338B2 (en) 2018-12-13 2024-03-19 Teikyo University Method for estimating operation voltage of solar battery cell in solar battery module and solar battery cell operation voltage estimation system
US11817591B2 (en) 2020-05-22 2023-11-14 Duracell U.S. Operations, Inc. Seal assembly for a battery cell

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