WO2004077592A1 - アルカリ電池用封口ガスケットおよび密閉型アルカリ電池 - Google Patents
アルカリ電池用封口ガスケットおよび密閉型アルカリ電池 Download PDFInfo
- Publication number
- WO2004077592A1 WO2004077592A1 PCT/JP2004/002103 JP2004002103W WO2004077592A1 WO 2004077592 A1 WO2004077592 A1 WO 2004077592A1 JP 2004002103 W JP2004002103 W JP 2004002103W WO 2004077592 A1 WO2004077592 A1 WO 2004077592A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin
- battery
- sealing gasket
- gasket
- electrode terminal
- Prior art date
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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
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/04—Cells with aqueous electrolyte
- H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
- H01M6/08—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with cup-shaped electrodes
-
- 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 of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/167—Lids or covers characterised by the methods of assembling casings with lids by crimping
-
- 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 of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
-
- 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 of a single cell or a single battery
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
-
- 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 of a single cell or a single battery
- 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 of a single cell or a single battery
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/193—Organic 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 of a single cell or a single battery
- 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
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/15—Sheet, web, or layer weakened to permit separation through thickness
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/21—Circular sheet or circular blank
- Y10T428/215—Seal, gasket, or packing
Definitions
- the present invention relates to a sealing gasket for an alkaline battery and a sealed alkaline battery, and more particularly to a technique effective when applied to an alkaline dry battery having an explosion-proof function.
- Alkaline dry batteries commonly referred to by model names such as AM, contain a power generation element in a metal battery can that also serves as the positive electrode terminal, and the battery can opening is sealed with a negative electrode terminal and a resin sealing gasket. Is done.
- the sealing gasket has a peripheral packing part and a partition part.
- the peripheral packing portion hermetically seals the opening of the battery can by being interposed between the opening of the battery can and the negative electrode terminal under pressure.
- the partition separates the space behind the negative electrode terminal from the space where the power generating element is housed.
- a safety valve function for preventing the battery from being ruptured due to the rise in the gas pressure is provided. Can be formed. Thereby, an explosion-proof sealed alkaline battery can be configured (for example, Japanese Patent Application Laid-Open Nos. Hei 7-10959-2005 and Japanese Patent Laid-Open No. 2000-251-1987).
- the sealing gasket preferably has excellent flexibility and impact resistance in addition to alkali resistance in order to ensure high sealing performance of the alkaline dry battery over a long period of time.
- resin is used as the material for the gasket.
- polypropylene (PP) resin is regarded as a useful material with excellent moldability.
- PP resin with increased crystallinity or a PP resin added with a rubber-based resin has been used.
- the impact resistance of the resin used for the sealing gasket is evaluated by the Izod impact value (Izod impact test value) according to the measurement method of JIS-K 7110-1984.
- Izod impact test value In general Hard materials are brittle, soft materials are good. As an index for evaluating the toughness of such materials, the Izod impact value is often used in the case of resin (plastic).
- the Izod impact value is the magnitude of the impact energy absorbed by the material under test (resin), which is small for brittle materials and large for tough materials.
- the sealing gasket provided with the safety valve function of the thin portion operates when the thin portion breaks due to a rise in gas pressure inside the battery.
- a conventional sealing gasket with a safety valve function made of resin with high shock resistance (Izod impact value of 80 or more) has good operability of the safety valve function against sudden pressure rise inside the battery, If the pressure gradually increases, the safety valve function may not operate reliably due to the resin creep phenomenon. In other words, it has been found that the operability of the safety valve function is poor and the risk of battery rupture increases. Creep in this case is a property peculiar to resin (plastic), and is a phenomenon in which the amount of deformation gradually increases when a constant force is applied for a long time.
- the resin molded in a mold is molecularly oriented in the flow direction of the resin injected into the mold at the time of molding, but the creep phenomenon of the thin portion appears largely in the orientation direction. Therefore, the thin portion is preferably formed so as to be broken along the orientation direction, and for this purpose, the thin portion is preferably formed by a groove in the same direction as the orientation direction. However, even in this case, it is necessary to make the resin brittle in order to surely break the thin portion at a predetermined gas pressure. That is, it is necessary to lower the Izod impact value.
- the original function of the sealing gasket, especially the sealing function at the peripheral packing is reduced, and the high hermeticity of the battery is maintained for a long time. Is not possible to maintain over time.
- the sealing gasket hermetically seals the inside of the battery can with the peripheral packing part interposed between the opening of the battery can and the negative electrode terminal in a pressed state. Flexibility is important. For this reason, if a good sealing function is required for the sealing gasket, the resin used as the material must have flexibility, and a high impact resistance of at least an Izod impact value of 80 to 100 is required. It had to be resin (PP).
- the safety valve function can be tested by forcing a charging current through the battery to generate a reaction gas inside the battery.However, in order to perform the test efficiently, a large charging current may be passed to increase the gas generation rate. By rapidly increasing the gas pressure in this way, the test can be performed efficiently in a short time. However, in this case, the operability when the gas pressure gradually increases cannot be checked.
- the present inventor believes that the operation state of the safety valve function is greatly different depending on the gas pressure increase state.If the gas pressure rises sharply, even if the operability is good, if the gas pressure gradually increases, I learned that the operability would be worse.
- the conventional sealing gasket for alkaline batteries described above has a sealing function to maintain high hermeticity of the battery for a long period of time and a safety valve function to operate when the gas pressure inside the battery gradually increases. It was found that there was a problem that sex was incompatible. ⁇
- the means according to the present invention comprises: a peripheral packing portion which is interposed between the opening of the metal battery can housing the power generating element and also serving as the positive electrode terminal and the negative electrode terminal in a pressed state and hermetically seals the opening; A partition wall separating the back space of the negative electrode terminal and the storage space of the power generating element, wherein the partition breaks in advance due to an increase in gas pressure in the storage space and is a safety valve.
- the groove direction of the thin portion is the same direction as the resin orientation of the gasket, and the Izod impact of the resin forming the gasket. ⁇ It is characterized in that the value is in the range of 20 to 60 J / m (temperature 23 ⁇ 2 ° C, relative humidity 50 ⁇ 5%).
- the safety valve function to prevent the rupture of the sealed alkaline battery is reliably operated even when the gas pressure inside the battery is gradually increased, and the high airtightness of the battery is maintained for a long time. It is possible to provide a sealing gasket for an alkaline battery which can be operated. In addition, by using the sealing gasket, a sealed alkaline battery having both an explosion-proof function and leakage resistance can be provided.
- At least one or more stress buffer portions having a concave cross section are provided in the partition portion, and the thin portion is provided on the stress buffer portions.
- the wall thickness of the partition is from 0.3 to 0.8 mm, and the thickness of the thin portion is from 0.1 to 0.4 mm.
- a distance between re-approaching positions from the center of the partition wall to the negative electrode terminal is set to 1.0 to 3.0 mm.
- FIG. 1 is an enlarged cross-sectional view showing a main part of a sealed alkaline battery using a sealing gasket for an alkaline battery according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view showing one embodiment of a sealed type alkaline battery using the sealing gasket of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- the battery 10 shown in Fig. 2 is an alkaline dry battery called by the model name of AM, and a power generating element 20 is housed in a metal battery can 11 having a bottomed cylindrical shape.
- the opening of the battery can 11 is hermetically sealed with a sealing body 30.
- the battery can 11 is formed by pressing a thin metal plate such as a nickel-plated thin steel plate or a nickel-iron alloy, and also serves as a positive electrode terminal.
- the power generation element 20 is composed of a positive electrode mixture 21 formed by solidifying a positive electrode active material containing manganese dioxide and the like into a predetermined shape (tubular shape) 21, a separator 22 impregnated with an alkaline electrolyte, and a negative electrode gel 23 It is composed of A rod-shaped negative electrode current collector 31 is inserted into the negative electrode gel 23.
- the sealing body 30 is a collective component in which a current collector 31, a dish-shaped metal negative electrode terminal 32, and a resin-made electrically insulating sealing gasket 33 are integrated in advance, and the battery can 11 is opened.
- the battery can 11 After the battery can 11 is inserted into the battery case, the battery can 11 is hermetically sealed by caulking the opening.
- the gasket 33 is interposed between the opening of the battery can 11 and the peripheral edge of the negative electrode terminal 32 in a pressure-pressed state, and the space behind the negative electrode terminal 32 and the power generation element 20
- the interior of the battery can 11 is hermetically sealed by isolating between the storage spaces.
- the gasket 33 has a function of a safety valve for preventing a rupture of the battery 10 due to a premature rupture due to a rise in pressure in the battery can 11 in which the power generation element 20 is stored.
- the gas generated abnormally in the battery 10 is allowed to escape to the outside through a gas vent passage (small hole) formed near the periphery of the negative electrode terminal 32 due to the premature rupture of the gasket 33.
- FIG. 1 shows a cross-sectional view of the sealing gasket 33 used in the battery 10.
- the sealing gasket 33 shown in the figure is a molded product integrally having a central boss 34, a peripheral packing 36, and an intermediate partition 37, and is mainly made of polypropylene (PP). It is formed of a resin.
- the central boss 3 4 has the above current collector 31 has a hole 35 penetrating in a compacted state.
- the peripheral packing portion 36 hermetically seals the opening of the battery can 11 by being interposed between the opening of the battery can 11 and the negative electrode terminal 32 in a pressed state.
- the middle partition 37 separates the space behind the negative electrode terminal 32 from the space where the power generating element 20 is stored.
- the partition wall 37 has an outer peripheral side and a central side to reduce the stress applied in the inner peripheral direction of the sealing gasket when the opening of the battery can 11 is swaged against the negative electrode terminal 32 and the sealing gasket 33.
- Stress buffering sections A and B are provided at two locations.
- the angle 01 of the stress buffer A on the outer peripheral side that is, the angle 01 between the vertical part connected to the peripheral packing part 36 and the inclined partition part connected to the stress buffer B in the center, is the type of battery. It is preferably formed in the range of 30 ° to 70 °, though it varies depending on the type.
- the stress buffering section B at the center is provided for absorbing stress accumulated in the buffering section A, and its angle ⁇ 2 is preferably set to 120 ° to 170 °.
- the partition 37 has a thin portion 38 formed therein.
- the thin portion 38 is formed in a groove shape. That is, the bottom of the groove formed in the partition wall 37 forms the thin wall 38.
- the wall thickness of the partition wall is 0.3 to 0.8 mm
- the thin wall 38 has a wall thickness of 0.1 to 0.4 mm so as to break at an internal pressure of the battery of 3 to 6 MPa. It is to be.
- the groove direction of the thin wall portion 38 is formed in the same direction as the resin orientation of the gasket 33 (indicated by a broken arrow).
- the gasket 33 has a resin injection port, that is, a gate at the lower end (the lower end in the drawing) of the central boss 34 at the time of molding.
- the resin injected from the gate flows in the mold in the direction of the broken line in the figure, and the gasket 33 is formed.
- the resin is oriented in the direction of flow of the resin during molding.
- the thin portion 38 functions as a safety valve that breaks prematurely when the internal pressure due to gas generation in the battery 10, that is, the gas pressure in the storage space increases, and releases the gas pressure. That is, when gas is generated inside the battery, the gas pressure generated thereby acts to expand the partition wall portion 37 toward the negative electrode terminal.
- the buffer section B is located at the center of the partition wall section 37, the displacement amount becomes maximum.
- the thin portion 38 of the buffer portion B breaks in response to this rapidly, and the thin portion 38 does not contact the corner portion 40 of the negative electrode terminal.
- the buffer portion B also gradually expands, and if the distance d between the buffer portion B and the corner portion 40 of the negative electrode terminal is small, the buffer portion B becomes the corner portion of the negative electrode terminal before the thin portion 38 is broken. Contact with 40 can also occur. If such contact occurs over the entire periphery of the corner portion 40, it becomes difficult to break the thin portion 38 as a safety valve, and in the worst case, the battery will burst.
- One way to avoid this phenomenon is to increase the distance d between the buffer section B and the corner 40 of the negative electrode terminal.However, increasing this distance leads to a decrease in the volume inside the battery. However, the discharge capacity is reduced. This has a significant effect especially on small volumes such as LR3.
- the distance d between the buffer portion B and the corner portion 40 of the negative electrode terminal is set to 1.3 to 3, O mm. , Preferably in the range of 1.0 to 2.5 mm.
- the resin used for the gasket 33 should preferably have a high impact resistance of Izod impact value of 80 to 100 j / m.
- Izod impact value 80 to 100 j / m.
- the sealing gasket 33 of this embodiment has an Izod impact value of 20 to 60 J / m (temperature 23 ⁇ 2 ° C, relative humidity 50 ⁇ 5 %) Is used.
- the present inventor uses the resin having an Izod impact value of 20 to 60 j / m as the resin of the sealing gasket 33, thereby ensuring the safety valve function even when the gas pressure gradually increases. It has been found that an optimum condition can be obtained that can be operated and reliably maintain the airtightness over a long period of time. This ensures the operation of the safety valve function to prevent the rupture of the sealed alkaline battery without being affected by the rise in gas pressure, and allows the battery to maintain high airtightness over a long period of time. Became. By using this sealing gasket 33, a sealed alkaline battery 10 having both an explosion-proof function and leakage resistance was able to be obtained.
- Izod impact value is 10 to 18 J / m (Temperature 23 ⁇ 2 ° C, relative humidity 50 ⁇ 5%, The same applies to the following) polypropylene resin, 20 to 30 j / m resin, 40 to 60 jZm resin, 63 to 80 J / m resin, 85 to: L 20 J / m resin, for each resin
- the sealing gaskets having the same shape were manufactured by the number of tests (10 pieces). Then, a test battery (LR 6 type alkaline dry battery) was prepared for each gasket and an evaluation test was performed.
- the wall thickness of the partition was 0.4 mm, and the thickness of the thin wall was 0.2 mm.
- the sealing gasket made of resin with an Izod impact value of 10 to 18 J / m (specimen group No. 1) has the safety valve function due to the breakage of the thin part in all test specimens. It worked and there was no inactivity. Although not shown in Table 1 above, no swelling of the battery was observed. However, this was due to the operating pressure of the safety valve being too low. In other words, the thin portion is brittle and easily breaks, and the safety valve has been activated excessively even within the allowable range where the gas pressure in the battery has not yet risen sufficiently. If this is the case, there is a concern that leakage may occur due to malfunction of the safety valve even under normal use. In addition, the gasket is not flexible, and is not suitable for a sealed alkaline battery that is required to maintain high hermeticity over a long period of time.
- a sealing gasket made of resin with an Izod impact value of 20 to 60 JZm has a safety valve function to prevent the burst of a sealed alkaline battery, and the gas pressure inside the battery gradually increases. It was found that the battery can be operated reliably even in the case of the above, and that the high airtightness of the battery can be maintained for a long period of time.
- a sealing gasket in which the groove direction of the thin portion 38 was formed at right angles to the orientation direction of the resin (the flow direction of the dashed arrow) was prototyped, and the same evaluation test as in Example 1 was performed.
- the rigidity of the resin was high in the breaking direction of the thin portion 38 and the resin was elongated, so that the safety valve function could not be reliably operated. It was necessary to make the resin brittle to ensure its operation. However, it was found that if the resin was brittle, the sealing function of the sealing gasket was reduced, and it was not possible to obtain high hermeticity over a long period of time. This indicates that the present invention is effective when the groove direction of the thin portion is the same as the resin orientation of the gasket.
- the same evaluation test was performed with a charging current of 80111 Pm 15 O mA.
- the charging current is large, the reactant gas in the battery is generated at a relatively high speed, but the thin-walled portion may break at substantially the same gas pressure as in the first embodiment and perform a predetermined safety valve function. confirmed.
- the safety valve function was able to operate at an appropriate operating pressure regardless of whether the gas pressure inside the battery gradually increased or rapidly increased.
- the safety valve function for preventing the rupture of the sealed alkaline battery can be reliably operated even when the gas pressure inside the battery gradually increases, and the high airtightness of the battery can be achieved.
- the sealing gasket for an alkaline battery can be provided.
- the sealing gasket it is necessary to provide a sealed type alkaline battery having both an explosion proof function and a liquid leakage resistance.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005502876A JPWO2004077592A1 (ja) | 2003-02-25 | 2004-02-24 | アルカリ電池用封口ガスケットおよび密閉型アルカリ電池 |
US11/211,364 US7144656B2 (en) | 2003-02-25 | 2005-08-25 | Alkaline battery sealing gasket and sealed alkaline battery |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003047161 | 2003-02-25 | ||
JP2003-047161 | 2003-02-25 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/211,364 Continuation US7144656B2 (en) | 2003-02-25 | 2005-08-25 | Alkaline battery sealing gasket and sealed alkaline battery |
Publications (1)
Publication Number | Publication Date |
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WO2004077592A1 true WO2004077592A1 (ja) | 2004-09-10 |
Family
ID=32923259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/002103 WO2004077592A1 (ja) | 2003-02-25 | 2004-02-24 | アルカリ電池用封口ガスケットおよび密閉型アルカリ電池 |
Country Status (3)
Country | Link |
---|---|
US (1) | US7144656B2 (ja) |
JP (1) | JPWO2004077592A1 (ja) |
WO (1) | WO2004077592A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006326762A (ja) * | 2005-05-26 | 2006-12-07 | Fuji Xerox Co Ltd | 円筒状基体表面処理方法および円筒状基体表面処理装置 |
WO2007010669A1 (ja) * | 2005-07-15 | 2007-01-25 | Matsushita Electric Industrial Co., Ltd. | アルカリ乾電池 |
WO2024053213A1 (ja) * | 2022-09-07 | 2024-03-14 | パナソニックIpマネジメント株式会社 | アルカリ乾電池 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0714477D0 (en) * | 2007-07-25 | 2007-09-05 | Seetru Ltd | A static rig for the determination of safety valve parameters |
KR102275779B1 (ko) * | 2017-11-17 | 2021-07-13 | 주식회사 엘지에너지솔루션 | 이차전지 |
EP4097786A1 (en) | 2020-05-22 | 2022-12-07 | Duracell U.S. Operations, Inc. | Seal assembly for a battery cell |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56132765A (en) * | 1980-03-19 | 1981-10-17 | Matsushita Electric Ind Co Ltd | Manufacture of sealing body for battery |
JPS61133552A (ja) * | 1984-12-03 | 1986-06-20 | Fuji Elelctrochem Co Ltd | 防爆形電池用封口ガスケツト |
JPH02201865A (ja) * | 1989-01-31 | 1990-08-10 | Fuji Elelctrochem Co Ltd | 防爆型電池用封口ガスケット |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57107558A (en) * | 1980-12-24 | 1982-07-05 | Fuji Elelctrochem Co Ltd | Seal gasket for explosion-proof battery |
JPS63166140A (ja) | 1986-12-26 | 1988-07-09 | Sanyo Electric Co Ltd | 密閉型電池 |
JPH07105925A (ja) | 1993-10-07 | 1995-04-21 | Matsushita Electric Ind Co Ltd | 筒型アルカリ電池 |
JP2981418B2 (ja) * | 1995-10-25 | 1999-11-22 | 富士電気化学株式会社 | アルカリ電池 |
JP2002251987A (ja) | 2000-12-22 | 2002-09-06 | Fdk Corp | 密閉型電池の安全弁 |
-
2004
- 2004-02-24 JP JP2005502876A patent/JPWO2004077592A1/ja active Pending
- 2004-02-24 WO PCT/JP2004/002103 patent/WO2004077592A1/ja active Application Filing
-
2005
- 2005-08-25 US US11/211,364 patent/US7144656B2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56132765A (en) * | 1980-03-19 | 1981-10-17 | Matsushita Electric Ind Co Ltd | Manufacture of sealing body for battery |
JPS61133552A (ja) * | 1984-12-03 | 1986-06-20 | Fuji Elelctrochem Co Ltd | 防爆形電池用封口ガスケツト |
JPH02201865A (ja) * | 1989-01-31 | 1990-08-10 | Fuji Elelctrochem Co Ltd | 防爆型電池用封口ガスケット |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006326762A (ja) * | 2005-05-26 | 2006-12-07 | Fuji Xerox Co Ltd | 円筒状基体表面処理方法および円筒状基体表面処理装置 |
WO2007010669A1 (ja) * | 2005-07-15 | 2007-01-25 | Matsushita Electric Industrial Co., Ltd. | アルカリ乾電池 |
WO2024053213A1 (ja) * | 2022-09-07 | 2024-03-14 | パナソニックIpマネジメント株式会社 | アルカリ乾電池 |
Also Published As
Publication number | Publication date |
---|---|
US20060024576A1 (en) | 2006-02-02 |
JPWO2004077592A1 (ja) | 2006-06-08 |
US7144656B2 (en) | 2006-12-05 |
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