WO2008081671A1 - 電池缶の製造方法及び密閉型電池の製造方法 - Google Patents
電池缶の製造方法及び密閉型電池の製造方法 Download PDFInfo
- Publication number
- WO2008081671A1 WO2008081671A1 PCT/JP2007/073264 JP2007073264W WO2008081671A1 WO 2008081671 A1 WO2008081671 A1 WO 2008081671A1 JP 2007073264 W JP2007073264 W JP 2007073264W WO 2008081671 A1 WO2008081671 A1 WO 2008081671A1
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- WO
- WIPO (PCT)
- Prior art keywords
- battery
- molded body
- blade
- manufacturing
- cutting
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 60
- 238000005520 cutting process Methods 0.000 claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 claims description 36
- 238000012545 processing Methods 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000010248 power generation Methods 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims description 3
- 238000010409 ironing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 11
- 239000000203 mixture Substances 0.000 description 7
- 238000007789 sealing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000011109 contamination Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000007429 general method Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- -1 nickel metal hydride Chemical class 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D21/00—Machines or devices for shearing or cutting tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/18—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like
-
- 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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/117—Inorganic material
- H01M50/119—Metals
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/545—Terminals formed by the casing of the cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D21/00—Machines or devices for shearing or cutting tubes
- B23D21/006—Machines or devices for shearing or cutting tubes and sealing, crushing or chamfering the tubes
-
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- 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
-
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
Definitions
- the present invention relates to a method for manufacturing a battery can used for a sealed battery such as a primary battery or a secondary battery, and a method for manufacturing a sealed battery using the battery can manufactured by this method.
- a sealed battery such as a primary battery or a secondary battery generally includes a battery can formed in a bottomed cylindrical shape, and a power generation element composed of a positive electrode, a negative electrode, and an electrolyte solution. It is assembled by sealing the open end with a lid and gasket.
- the battery can is manufactured by drawing a metal plate to form a thin-walled cylindrical molded body, and then cutting the vicinity of the open end of the molded body along its outer periphery. It is done.
- the formed body is usually cut by press working with a punch and a die.
- a certain gap (talarance) is provided between the punch and the die, and this clearance inevitably generates burrs on the cut surface. Therefore, by optimizing the clearance, the generation of burrs can be suppressed, but it cannot be completely eliminated.
- burrs are generated on the cut surface of the molded body, that is, the end face of the battery can, when the power generation element is housed in the battery can, for example, a composite containing an active material formed on the surface of the positive electrode or the negative electrode is included.
- the agent layer comes into contact with the paste, a part of the mixture layer is peeled off, and if it mixes into the battery can, it may cause an internal short circuit.
- the burr generated on the end face of the battery can may be peeled off and the battery can and the lid (sealing plate) may be short-circuited (external short circuit), causing a voltage drop.
- the gasket when inserting the gasket into the open end of the battery can, When the gasket contacts the gasket, a part of the gasket may be damaged, which may reduce the sealing degree of the battery can.
- Patent Document 1 describes a method in which the open end of a battery can molded into a bottomed cylindrical shape is tapered wider than the inner diameter of the main part of the battery can. RU By tapering the opening end of the battery can, it is possible to avoid the burr generated at the opening end of the battery can from contacting the gasket in the step of sealing the opening end of the battery can. Similarly, when the power generation element is housed in the battery can, the mixture layer can be prevented from coming into contact with the burr, and foreign matter can be prevented from entering the battery can.
- Patent Documents 2 and 3 describe a method of forming a rounded end face of the open end in addition to making the open end of the battery can tapered. As a result, the gasket can be prevented from being damaged by the open end portion of the battery can, and the mixture layer can be damaged and foreign matter can be prevented from being mixed into the battery can.
- the method of rounding the end face of the opening end is performed by the following method. That is, as shown in FIG. 7 (b), the molded body 100 molded into a bottomed cylindrical shape has an inner diameter d2 larger than the inner diameter dl of the main part of the molded body 100 at the opening end. A taper portion 101 that widens to have a taper portion 102 that widens to have a larger inner diameter d3 is formed. Then, by cutting the tapered portion 102 in a direction parallel to the side surface of the molded body 100 (in the direction of arrow A in the figure), as shown in FIG. 7 (a), the inner end surface of the opening end is rounded. Can be formed.
- Patent Document 1 Japanese Patent Laid-Open No. 2001-52656
- Patent Document 2 Japanese Patent Laid-Open No. 9161736
- Patent Document 3 JP-A-10-321198
- the above-mentioned conventional countermeasure is a process in which Paris generated on the end face of the battery can and a mixture layer formed on the surface of the positive electrode or the negative electrode, a gasket, or the like are in contact in the battery assembly process. It was made paying attention to.
- FIG. 8 is a flowchart showing a general assembly process of the battery.
- a metal plate is prepared, and this is drawn (S1) to form a bottomed cylindrical molded body 100 having a reduced thickness.
- the battery can 200 is formed by cutting the vicinity of the open end of the molded body 100 (S2)).
- beat processing S4 is performed near the open end of the battery can 200.
- a sealing member stopper (lid and gasket) is attached to the open end of the battery can 200 (S5), and the battery can 200 is sealed by caulking (S6) to complete the assembly of the battery. .
- the conventional measures described above include a step (S3) in which a burr generated on the end face of the battery can 200 and a mixture layer formed on the surface of the positive electrode or the negative electrode come into contact in the battery assembly process. Is considered to have been made by paying attention to the step (S5) in contact with the gasket or the like.
- the inventor of the present application performs a process executed by pressing a predetermined part of the battery can 200 with a pressing member or the like after fixing the battery can 200 with a fixing jig or the like in the assembly process, that is, We focused on beat processing (S4) and force processing (S6).
- FIG. 9 is a diagram for explaining a general method of beat processing (S4).
- the battery can 200 is fixed with the fixing jig 300.
- the end of the battery can 200 was brought into contact with the holding jig 302.
- the pressing member (die) 301 is pressed along the outer periphery of the battery can 200 toward the axis side of the battery can 200 (in the direction of arrow A in the figure), and the bottom of the battery can 200 is electrically connected to the fixing jig 300.
- a constriction (beat portion) 201 along the outer periphery of the battery can 200 is formed.
- FIGS. 10 (a) and 10 (b) are diagrams for explaining a general method of caulking (S6). Note that the gasket and the lid fitted into the open end of the battery can 200 are omitted. As shown in FIG. 10 (a), with the beat portion of the battery can 200 fixed by the fixing jig 400, the end of the battery can 200 is pressed in the direction of arrow A by the pressing member (caulking jig) 401. By pressing, the end of the battery can 200 is sealed by caulking the end of the battery can 200 as shown in FIG. 10 (b).
- the end of the battery can 200 has a holding jig 302, a force fitting jig 301, and the like. Therefore, the burrs generated on the end face of the battery can 200 may be scraped off by these jigs and mixed into the battery can 200. Also, the scraped burrs may be directly applied to the battery can 200. If the beat processing (S4) or caulking processing (S6) is repeated with burrs still attached to the jigs 301 and 302 even if they are not mixed in, the Paris attached to the jigs 301 and 302 will be removed.
- the battery peels off and enters into the battery can 200.
- the battery can 200 is introduced into the battery can 200 due to burrs generated on the end face of the battery can 200. Almost no consideration was given to contamination.
- the present invention has been made on the basis of such knowledge, and the main purpose thereof is that burrs generated on the end face of the battery can are contained in the battery can in the battery assembly process (beat processing, caulking processing, etc.). It is an object of the present invention to provide a method for manufacturing a battery can that can effectively prevent contamination.
- FIG. 11 (a) shows a method of cutting the vicinity of the open end 110 of the molded body 100
- FIG. 11 (b) shows the state of the burr 130a generated on the cut surface 120a of the molded body 100 after cutting.
- the cutting method shown in FIG. 11 (a) is based on the method shown in FIG. 7 (b), and the punch disposed outside the molded body 100 (for example, the inner diameter is larger than the outer diameter of the molded body 100).
- a large cylindrical one) 500 is punched out on the die 501 arranged inside the molded body 100 (for example, a cylindrical one whose outer diameter is smaller than the inner diameter of the molded body 100).
- the cut surface 120a of the molded body 100 cut by this method has a burr (hereinafter referred to as “upper burr”! /) In a direction parallel to the side surface of the molded body 100.
- B) 130a is generated.
- an upper burr 130a is generated on the end face of the molded body (battery can) 100 in such a state, beat processing or caulking processing as shown in Fig. 9 or Fig. 10 (a), (b) is performed. In this case, the upper burr 130a is likely to be crushed by hitting the jigs 22 and 32 first.
- the vicinity of the open end 110 of the molded body 100 is cut in a direction parallel to the side surface of the molded body 100, but in addition to that, it is cut in a direction perpendicular to the side surface of the molded body 100. It is also possible.
- a punch for example, a cylindrical one having an outer diameter smaller than the inner diameter of the molded body 100
- a die for example, having an inner diameter of less than the inner diameter of the molded body 100
- the cut surface 120b of the molded body 100 cut by such a method is directed toward the outer side in the direction perpendicular to the side surface of the molded body 100 (hereinafter referred to as “outer burr”). ”) 130b occurs.
- the outer burr 130b is generated on the end face of the molded body (battery can) 100 in such a state, the outer burr 130b is moved to the beat calorie caulking as in the case of the upper burr 130a. There is a high risk of being crushed by hitting the force S and jigs 22 and 32 first.
- the battery can manufacturing method includes a step of drawing a metal plate to form a bottomed cylindrical molded body, and the vicinity of the opening end of the molded body with respect to the axis of the molded body.
- a step of cutting in a vertical direction, and the step of cutting the molded body includes arranging a first blade on the inside of the molded body, and placing the second blade on the outer side of the molded body and closer to the opening end than the first blade. In the state where the first blade is in contact with the inner periphery of the molded body, the second blade is moved relative to the molded body toward the shaft side of the molded body. It is characterized by cutting.
- the first blade is composed of a round blade having an outer diameter smaller than the inner diameter of the molded body
- the second blade is a part force that contacts the molded body and is larger than the outer diameter of the molded body.
- it has a substantially arc shape with an inner diameter.
- the molded body is rotated about its axis, and further, the molded body is moved along a track along a portion of the second blade that has a substantially arc shape. Power to be done while S is preferable.
- burrs generated on the end face of the battery can be mixed in the battery can in the battery assembly process, and the positive electrode and the negative electrode are internally short-circuited. Therefore, it is possible to effectively suppress the battery, and it is possible to stably manufacture a highly reliable battery. In addition, it is possible to effectively prevent the burr generated on the end face of the battery can from peeling off and externally short-circuiting the battery can and the casing, thereby producing a battery having stable performance. it can.
- FIG. 1 is a diagram showing a method for manufacturing a battery can according to an embodiment of the present invention, where (a) is a cross-sectional view of a molded body, and (b) is a partially enlarged view showing a method for cutting the molded body.
- FIG. 3 (c) is a diagram showing a state of a cut surface of a molded body.
- FIG. 2 is a diagram showing a specific method for cutting a molded body in the present embodiment.
- FIG. 3 is a view showing another specific cutting method of the molded body in the present embodiment.
- FIG. 4 is a partial photograph showing an end face of a battery can in the present embodiment.
- FIG. 5 is a cross-sectional view showing a configuration of a cylindrical sealed battery according to the present invention.
- FIG. 6 is a graph showing the voltage drop occurrence rate of the battery according to the present invention.
- FIG. 7] (a) and (b) are diagrams illustrating a conventional method of cutting a molded body.
- FIG. 8 is a flowchart illustrating a conventional battery assembly process.
- FIG. 9 is a cross-sectional view illustrating a conventional method for forming a beat portion.
- FIG. 10 (a) and (b) are cross-sectional views illustrating a conventional caulking process.
- FIG. 11 (a) and (b) are diagrams illustrating the state of occurrence of burrs generated by cutting a conventional molded body.
- FIG. 12 (a) and (b) are diagrams illustrating the state of occurrence of burrs generated by cutting a conventional molded body.
- FIGS. 1 (a;) to (c) are diagrams schematically showing a method for manufacturing a battery can in the present embodiment.
- Fig. 1 (a) is a cross-sectional view of a molded body 10 formed by drawing a metal plate into a thin-walled bottomed cylindrical shape, and shows the vicinity of the opening end 11 of the molded body 10 relative to the axis of the molded body 10.
- a battery can is manufactured by cutting in the vertical direction (along the dotted line in the figure).
- the step of cutting the molded body 10 is performed in a state where the first blade 31 is in contact with the inner periphery of the molded body 10 as shown in the partially enlarged view of FIG.
- the second blade 30 disposed along the outer periphery of the workpiece is moved relative to the molded body 10 toward the axis side of the molded body 10 (in the direction of arrow A in the figure) to cut the molded body 10.
- an inner burr 13 is generated on the cut surface 12 of the molded body 10 in a direction perpendicular to the side surface of the molded body 10 and inward.
- FIG. 2 is a diagram schematically showing a specific cutting method of the molded body 10 in the present embodiment.
- a cylindrical punch (first blade) 31 having an outer diameter smaller than the inner diameter of the molded body 10 is arranged inside the molded body 10, and the molded body 10 is placed outside the molded body 10.
- a die (second blade) 30 having a substantially arc shape in which the portion abutting on the surface has an inner diameter larger than the outer diameter of the molded body 10 is disposed. Then, with the punch 31 in contact with the inner periphery of the molded body 10, the molded body 10 is rotated around the axis in the direction of arrow A in the figure, and at the same time, the punch 31 is moved to the arrow in the figure. The molded body 10 is cut by moving in the direction B.
- the die 30 is moved only in the axial direction of the molded body 10 without arranging the die 30 over the entire circumference of the molded body 10. Molded body 1 0 can be cut in a predetermined direction.
- the die 30 may be a circular shape (round blade) instead of the shape shown in FIG.
- FIG. 3 is a diagram schematically showing another cutting method for the molded body 10 in the present embodiment.
- a cylindrical punch (first blade) 41 having an outer diameter smaller than the inner diameter of the molded body 10 is arranged inside the molded body 10, and the molded body 10 is placed outside the molded body 10.
- a die (second blade) 40 having a substantially circular arc shape having an inner diameter larger than the outer diameter of the molded body 10 is disposed at the contacted portion. Then, with the punch 41 in contact with the inner periphery of the molded body 10, the molded body 10 is rotated about its axis, and at the same time, the molded body 10 has a substantially arc shape of the die 40. The molded body 10 is cut by moving the track along the portion 40a.
- the plurality of molded bodies 10 are continuously cut by moving the plurality of molded bodies 10 continuously along the orbit along the portion 40a having a substantially arc shape of the die 40. can do. Thereby, a battery can be manufactured efficiently in a mass production process.
- the method for cutting the molded body 10 according to the present invention is not limited to the method described in the above embodiment, and the cutting surface 12 of the molded body 10 is perpendicular to the side surface of the molded body 10. As long as the burr 13 is generated toward the inner side of the force, any method may be used. For example, in FIG. 10>), with the second blade 30 fixed, the molded body 10 is moved in the direction of the second blade 30 with the first blade 31 in contact with the molded body 10. Thus, the molded body 10 may be cut.
- FIG. 4 shows a partial photograph of the end face of the battery can formed according to the present invention. Since the cutting of the molded body 10 in the present invention is performed by moving the second blade 30 arranged outside the molded body 10 to the inside of the molded body 10, as shown in FIG.
- the end face of ft is characterized by having a cut surface 20a on the outer peripheral side of the end face and a fracture surface 20b on the inner peripheral side. Further, the outer peripheral side of the end face of the battery can has a curved shape.
- FIG. 5 is a cross-sectional view showing the configuration of a cylindrical sealed battery manufactured using the battery can manufactured by the battery can manufacturing method of the present invention.
- the sealed battery according to the present invention can be manufactured by the normal manufacturing process shown in FIG. That is, after inserting the positive and negative power generating elements through the separator into the battery can, a bead portion having a constriction along the outer periphery of the battery can is formed in the vicinity of the opening end of the battery can. Open end of In addition, a lid and a gasket are arranged and the end of the battery can is forced to seal the battery can to complete a sealed battery.
- the sealed battery shown in FIG. 5 is an example of an alkaline battery. Inside the battery can (also serving as a positive electrode terminal) 20, a pellet-like positive electrode mixture 21 and a gel-like negative electrode 22 are accommodated via a separator 23. A beat portion 27 is formed in the vicinity of the opening end of the battery can 20, and the lid is formed by aligning with the beat portion 27 and integrating the gasket 24 and the negative electrode current collector 25 at the opening end of the battery can 20. (Also serves as the negative terminal) 26 is arranged. Then, the end portion 28 of the battery can 20 is caulked to the lid body 26 via the gasket 24, and the open end of the battery can 20 is sealed.
- FIG. 6 is a graph showing, as an example showing the effect of the present invention, the result of comparing the voltage drop occurrence rate of a nickel metal hydride storage battery manufactured in a mass production process between lots. This voltage drop is due to the fact that the Paris generated on the end face of the battery can 20 is peeled off and the battery can 20 and the lid 26 are short-circuited.
- Lots:! To 7 are batteries manufactured using battery cans manufactured by the method of the present invention (internal burrs are generated on the end faces).
- lot 8 is a battery manufactured using a battery can manufactured by the method shown in FIG. 12 (a) (external burr is generated on the end face).
- FIG. 6 the voltage drop occurrence rate of the battery manufactured using the method of the present invention is reduced by an order of magnitude compared to the battery manufactured using the method of the present invention. I understand that.
- the method according to the present invention is remarkably effective when applied to the mass production process of the battery, and can thereby improve the reliability of the battery manufactured in the mass production process. .
- the characteristics of the battery are likely to be affected even by the entry of minute foreign matter. Therefore, by applying the present invention, the yield in the mass production process can be improved.
- the sealed battery to which the present invention is applied It can be applied to primary batteries such as manganese dry batteries and lithium batteries, and secondary batteries such as lithium ion batteries and Nikkenore hydrogen storage batteries with no particular restrictions on the type.
- the present invention is useful for sealed batteries that require reliability, and can be applied to primary batteries, secondary batteries, and the like.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Primary Cells (AREA)
- Secondary Cells (AREA)
- Punching Or Piercing (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007800017693A CN101361207B (zh) | 2006-12-28 | 2007-11-26 | 电池罐的制造方法及密封式电池的制造方法 |
EP07849969A EP2045850B1 (en) | 2006-12-28 | 2007-11-26 | Process for producing battery can and process for producing hermetically sealed battery |
US12/095,077 US8268020B2 (en) | 2006-12-28 | 2007-11-26 | Method for manufacturing battery case and method for manufacturing hermetic battery |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006-356296 | 2006-12-28 | ||
JP2006356296A JP4989962B2 (ja) | 2006-12-28 | 2006-12-28 | 電池缶の製造方法及び密閉型電池の製造方法 |
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WO2008081671A1 true WO2008081671A1 (ja) | 2008-07-10 |
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PCT/JP2007/073264 WO2008081671A1 (ja) | 2006-12-28 | 2007-11-26 | 電池缶の製造方法及び密閉型電池の製造方法 |
Country Status (6)
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US (1) | US8268020B2 (ja) |
EP (1) | EP2045850B1 (ja) |
JP (1) | JP4989962B2 (ja) |
KR (1) | KR20090095547A (ja) |
CN (1) | CN101361207B (ja) |
WO (1) | WO2008081671A1 (ja) |
Cited By (2)
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US8202646B2 (en) | 2008-02-25 | 2012-06-19 | Panasonic Corporation | Battery can with cutting-edge portion higher than cutting start portion, manufacturing method and manufacturing device therefore, and battery using the same |
WO2019163179A1 (ja) * | 2018-02-20 | 2019-08-29 | パナソニックIpマネジメント株式会社 | 円筒形電池 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101258154B1 (ko) | 2009-04-22 | 2013-04-25 | 주식회사 엘지화학 | 원통형 전지용 캔의 제조 방법 및 그에 따른 원통형 전지용 캔 |
JP5461267B2 (ja) * | 2010-03-26 | 2014-04-02 | 三菱重工業株式会社 | 電極板製造装置、及び電極板製造方法 |
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- 2007-11-26 WO PCT/JP2007/073264 patent/WO2008081671A1/ja active Application Filing
- 2007-11-26 KR KR1020097008721A patent/KR20090095547A/ko active IP Right Grant
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US8202646B2 (en) | 2008-02-25 | 2012-06-19 | Panasonic Corporation | Battery can with cutting-edge portion higher than cutting start portion, manufacturing method and manufacturing device therefore, and battery using the same |
WO2019163179A1 (ja) * | 2018-02-20 | 2019-08-29 | パナソニックIpマネジメント株式会社 | 円筒形電池 |
Also Published As
Publication number | Publication date |
---|---|
US8268020B2 (en) | 2012-09-18 |
EP2045850B1 (en) | 2012-02-01 |
JP2008166190A (ja) | 2008-07-17 |
EP2045850A4 (en) | 2011-02-16 |
EP2045850A1 (en) | 2009-04-08 |
CN101361207B (zh) | 2011-09-21 |
KR20090095547A (ko) | 2009-09-09 |
US20100167119A1 (en) | 2010-07-01 |
CN101361207A (zh) | 2009-02-04 |
JP4989962B2 (ja) | 2012-08-01 |
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