WO2022005232A1 - 버튼형 이차전지 및 그의 제조방법 - Google Patents
버튼형 이차전지 및 그의 제조방법 Download PDFInfo
- Publication number
- WO2022005232A1 WO2022005232A1 PCT/KR2021/008376 KR2021008376W WO2022005232A1 WO 2022005232 A1 WO2022005232 A1 WO 2022005232A1 KR 2021008376 W KR2021008376 W KR 2021008376W WO 2022005232 A1 WO2022005232 A1 WO 2022005232A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- insertion groove
- gasket
- secondary battery
- button
- type secondary
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 24
- 238000004519 manufacturing process Methods 0.000 title claims description 20
- 238000003780 insertion Methods 0.000 claims abstract description 229
- 230000037431 insertion Effects 0.000 claims abstract description 229
- 238000003825 pressing Methods 0.000 claims description 19
- 238000002360 preparation method Methods 0.000 claims description 13
- 230000007423 decrease Effects 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910000474 mercury oxide Inorganic materials 0.000 description 1
- UKWHYYKOEPRTIC-UHFFFAOYSA-N mercury(ii) oxide Chemical compound [Hg]=O UKWHYYKOEPRTIC-UHFFFAOYSA-N 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
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- 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
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
- H01M10/0427—Button cells
-
- 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
- H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
-
- 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
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/153—Lids or covers characterised by their shape for button or coin cells
-
- 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
- H01M50/147—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
- 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
- H01M50/183—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
- H01M50/184—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
- 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
- H01M50/193—Organic material
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a button-type secondary battery and a method for manufacturing the same, and more particularly, to a button-type secondary battery in which bonding and adhesion between a lower can and an upper can are increased through a gasket, and a method for manufacturing the same.
- a secondary battery refers to a battery capable of charging and discharging unlike a primary battery that cannot be charged, and these secondary batteries are widely used in phones, notebook computers, camcorders, and electric vehicles.
- the secondary battery includes a button-type secondary battery having high energy density, high output, and long lifespan, wherein the button-type secondary battery includes an electrode assembly, a lower can accommodating the electrode assembly, an upper can coupled to the lower can, the It includes a gasket for sealing the lower can and the upper can.
- the present invention was invented to solve the above problems, and the present invention improves the structure of the lower can and the upper can, thereby increasing the bonding force and adhesion between the lower and upper cans through the gasket, and also prevents damage to the gaskets.
- An object of the present invention is to provide a button-type secondary battery capable of doing so and a method for manufacturing the same.
- a button-type secondary battery of the present invention for achieving the above object includes a lower can serving as a first electrode terminal; an upper can coupled to surround the lower can and also serving as a second electrode terminal; and a gasket provided between the lower can and the upper can, wherein a recessed lower insertion groove and a recessed upper insertion groove are respectively formed on a surface of the lower can to which the gasket is in close contact and a surface of the upper can. and the lower insertion groove and the upper insertion groove may be spaced apart from each other so as not to face each other.
- a portion of the gasket is introduced into the lower insertion groove and the upper insertion groove by clamping the lower can and the upper can, and a lower insertion protrusion and an upper insertion protrusion are formed on the surface of the gasket, and the lower insertion protrusion forms the
- the contact area between the lower can and the gasket may be increased, and the contact area between the upper can and the gasket may be increased by the upper insertion protrusion.
- the lower insertion groove or the upper insertion groove may have a triangular shape that gradually decreases in width toward the bottom.
- the lower insertion groove or the upper insertion groove may be provided in two or more, and the two or more lower insertion grooves or the two or more upper insertion grooves may be provided to be connected in a direction in which the lower can and the upper can are clamped. have.
- the two or more lower insertion grooves or the two or more upper insertion grooves may be provided to gradually increase in size in a direction in which the lower can and the upper can are clamped.
- the gasket may include an outer portion provided between the lower can and the upper can, an inner portion supported on an inner wall of the lower can, and a connection portion connecting an upper end of the outer portion and an upper end of the inner portion.
- a pressing protrusion for pressing the gasket provided between the lower can and the upper can may be formed on the lower can.
- the button-type secondary battery manufacturing method of the present invention includes a preparation step of preparing a lower can having a recessed lower insertion groove, an upper can having a recessed upper insertion groove, and a gasket disposed between the lower can and the upper can; a receiving step of accommodating an electrode assembly in which a first electrode, a separator, and a second electrode are alternately stacked in the lower can; an arrangement step of disposing a gasket on the upper part of the lower can, wherein the gasket is formed of an outer part supported on the outer peripheral surface of the lower can, an inner part supported on the inner peripheral surface of the lower can, and a connection part connecting the outer part and the inner part; and a clamping step of arranging the upper can on the upper part of the lower can and then clamping the lower can and the upper can to manufacture a button-type secondary battery, wherein in the preparation step, the lower insert formed in the lower can The groove and the upper insertion groove formed in the upper can may be formed to be spaced apart from each other without facing
- the clamping step when the lower can and the upper can are clamped, a portion of the gasket is introduced into the lower insertion groove and the upper insertion groove, and a lower insertion protrusion and an upper insertion protrusion are formed on the surface of the gasket, and the lower insertion protrusion
- the contact area between the lower can and the gasket may be increased
- the contact area between the upper can and the gasket may be increased by the upper insertion protrusion.
- the lower insertion groove or the insertion groove of the upper can may have a triangular shape that gradually decreases in width toward the bottom.
- two or more of the lower insertion grooves or the upper insertion grooves are provided, and the two or more lower insertion grooves or two or more of the upper insertion grooves are connected in a direction in which the lower can and the upper can are clamped. can be formed to be
- a pressure protrusion for pressing the gasket is formed on the lower can under the lower insertion groove, and in the clamping step, the lower part of the gasket is fixed by the pressure protrusion when the lower can and the upper can are clamped. Accordingly, the gasket may be introduced into the lower insertion groove and the upper insertion groove while extending in the direction of the upper can and the lower can.
- a recess-type lower insertion groove and a recess-type upper insertion groove are respectively formed in the lower can and the upper can to which the gasket is in close contact, and the lower insertion groove and the upper insertion groove are spaced apart so as not to face each other. It is characterized by being very positioned. Due to this characteristic, when a portion of the gasket is introduced into the lower insertion groove and the upper insertion groove when the lower can and the upper can are clamped, a lower insertion protrusion and an upper insertion protrusion are respectively formed on the surface of the gasket, thereby damaging the gasket. can be prevented, and as a result, adhesion and bonding force between the lower can and the upper can can can be increased.
- the lower insertion groove or the upper insertion groove is characterized in that it has a triangular shape that gradually decreases in width toward the bottom. Due to these characteristics, the gasket can be stably introduced into the entire lower insertion groove and the upper insertion groove, and as a result, the adhesion and bonding force between the lower can and the upper can can be increased.
- the lower insertion groove or the upper insertion groove is characterized in that two or more are provided to be connected. Due to these characteristics, two or more lower insertion protrusions and two or more upper insertion protrusions may be formed on the surface of the gasket.
- the button-type secondary battery of the present invention it is characterized in that a pressing protrusion for pressing the gasket is formed on the lower can under the lower insertion groove. Due to such a feature, the fixing force of the gasket can be increased, and accordingly, a part of the gasket is smoothly inserted into the lower insertion groove and the upper insertion groove, and as a result, the insertion protrusion can be effectively formed on the surface of the gasket.
- FIG. 1 is an exploded perspective view showing a button-type secondary battery according to a first embodiment of the present invention
- Figure 2 is an assembly cross-sectional view showing a button-type secondary battery according to the first embodiment of the present invention.
- FIG 3 is a cross-sectional view showing another example of the lower and upper insertion grooves in the button-type secondary battery according to the first embodiment of the present invention.
- FIG. 4 is a flowchart illustrating a method for manufacturing a button-type secondary battery according to a first embodiment of the present invention.
- FIG. 5 is a cross-sectional view illustrating a preparation step of a method for manufacturing a button-type secondary battery according to a first embodiment of the present invention.
- Figure 6 is a cross-sectional view showing the receiving step of the button-type secondary battery manufacturing method according to the first embodiment of the present invention.
- FIG. 7 is a cross-sectional view illustrating an arrangement step of a method for manufacturing a button-type secondary battery according to a first embodiment of the present invention.
- FIG. 8 is a cross-sectional view illustrating a clamping step of a method for manufacturing a button-type secondary battery according to a first embodiment of the present invention.
- FIG. 9 is a cross-sectional view illustrating a button-type secondary battery according to a second embodiment of the present invention.
- FIG. 10 is a cross-sectional view illustrating a button-type secondary battery according to a third embodiment of the present invention.
- the button-type secondary battery 100 is a secondary battery in which the length of the diameter is greater than the height, and the electrode assembly 110 and the electrode assembly ( and a can assembly 120 for receiving 110 .
- the button-type secondary battery is also called a coin cell, also called a Ruben battery, an RM battery, and a mercury battery. Since such a button-type secondary battery can be made small, it is widely used in hearing aids, portable lighters, wireless microphones, cameras, watches, and the like. And zinc is used for the negative electrode, and mercury oxide is used for the positive electrode. And zinc oxide and potassium hydroxide are used for the electrolyte.
- the electrode assembly 110 has a three-layer structure in which a first electrode, a separator, and a second electrode are sequentially stacked. Meanwhile, the electrode assembly is not limited to a three-layer structure, and may have a three-layer or more structure in which the first electrode and the second electrode are alternately stacked with a separator interposed therebetween.
- the separator is formed to be larger than the first electrode and the second electrode, and accordingly, the separator prevents the first electrode and the second electrode from being grounded, and as a result, an accident due to a short circuit is prevented.
- the first electrode is a cathode
- the second electrode is an anode.
- the can assembly 120 includes a lower can 121 connected to the first electrode of the electrode assembly 110 and serving as a first electrode terminal, a second electrode connected to the electrode assembly 110 and surrounding the lower can 121 .
- An upper can 122 coupled in the form of a second electrode terminal, and a gasket 123 provided between the lower can 121 and the upper can 122 to insulate the lower can and the upper can.
- the button-type secondary battery 100 has a structure that increases the adhesion and bonding force between the lower can 121 and the upper can 122 .
- a recessed lower insertion groove 121a is formed on the surface to which the gasket 123 is in close contact, and the upper can 122 is depressed in the surface to which the gasket 123 is in close contact.
- the upper insertion groove (122a) of the mold is formed.
- the lower insertion groove 121a and the upper insertion groove 122a are spaced apart from each other so as not to face each other when viewed in a state in which the lower can 121 and the upper can 122 are coupled.
- a portion of the gasket 123 is introduced into the lower insertion groove 121a and the upper insertion groove 122a by clamping the lower can 121 and the upper can 122 (that is, while being inserted).
- a lower insertion protrusion 123a-1 and an upper insertion protrusion 123a-2 are formed on the surface of the gasket 123, respectively.
- the adhesion area between the lower can 121 and the gasket 123 is increased by the lower insertion protrusion 123a-1, and the adhesion and bonding force can be increased.
- the adhesion area between the upper can 122 and the gasket 123 is increased by the upper insertion protrusion 123a-2, and the adhesion and bonding force can be increased.
- clamping refers to press-fitting or sitting two objects.
- the gasket 123 is disposed on the upper part of the lower can 121 , and then the upper can 122 is disposed on the upper part of the gasket 123 .
- the upper can 122 and the lower can 121 are combined by pressing the upper can 122 in the direction of the lower can 121 .
- a portion of the gasket 123 is introduced into the lower insertion groove 121a and the upper insertion groove 122a. Accordingly, a lower insertion protrusion 123a-1 and an upper insertion protrusion 123a-2 are formed on the surface of the gasket 123 .
- the lower insertion groove 121a and the upper insertion groove 122a are spaced apart from each other so as not to face each other in the lower can 121 and the upper can 122 . Accordingly, the lower insertion protrusion 123a-1 and the upper insertion protrusion 123a-2 formed on the surface of the gasket 123 are spaced apart from each other so as not to face each other. As a result, the amount of gasket 123 inserted into the lower insertion groove 121a and the upper insertion groove 122a can be sufficiently secured, and inserted into the lower insertion groove 121a and the upper insertion groove 122a.
- the lower insertion protrusion 123a-1 and the upper insertion protrusion 123a-2 can be stably formed while the insertion amount of the gasket is sufficiently secured, and as a result, the adhesion between the lower can 121 and the upper can 122 . and bonding strength can be increased.
- the lower insertion protrusion 123a-1 may be provided to be adhered to the lower insertion groove 121a
- the upper insertion protrusion 123a-2 may be provided to be adhered to the upper insertion groove 122a.
- the lower insertion protrusion 123a-1 may be adhered to the lower insertion groove 121a through an adhesive
- the upper insertion protrusion 123a-2 may be adhered to the upper insertion groove 122a through an adhesive. Accordingly, the coupling force between the lower insertion protrusion 123a-1 and the lower insertion groove 121a can be increased, and the coupling force between the upper insertion protrusion 123a-2 and the upper insertion groove 122a can be increased.
- the upper insertion groove 122a may have a larger area than the lower insertion groove 121a. That is, referring to FIG. 2 , the contact area between the upper can 122 and the gasket 123 is smaller than the contact area between the lower can 121 and the gasket 123, and accordingly, the upper insertion groove 122a is By forming a larger than the lower insertion groove 121a, the contact area between the upper can 122 and the gasket 123 can be increased, and as a result, electrolyte leakage can be prevented.
- the lower insertion groove 121a or the upper insertion groove 122a may have a triangular shape that gradually decreases in width toward the bottom. have. That is, the amount of the gasket 123 introduced gradually decreases toward the bottom of the lower insertion groove 121a or the upper insertion groove 122a. Accordingly, by forming the lower insertion groove 121a or the upper insertion groove 122a in a triangular shape, the amount of the gasket 123 is stably introduced to the bottom of the lower insertion groove 121a or the upper insertion groove 122a. As a result, the insertion protrusions 123a-1 and 123a-2 can be stably formed on the surface of the gasket.
- the lower insertion groove (121a) or the upper insertion groove (122a) may be formed in a semicircular shape that gradually decreases in width toward the bottom.
- the lower insertion groove 121a or the upper insertion groove 122a may be formed in the shape of a right-angled triangle in which the inner wall facing the lower can 121 is horizontal as seen in FIG. 3 . Accordingly, the insertion protrusions 123a-1 and 123a-2 formed on the gasket 123 may also be formed in a right-angled triangle shape.
- the gasket 123 includes an outer part 123a provided between the lower can 121 and the upper can 122, and the lower can ( It includes an inner portion 123b supported on the inner wall of 121 , and a connection portion 123c connecting an upper end of the outer portion 123a and an upper end of the inner portion 123b.
- the upper insertion protrusion 123a-2 and the lower insertion protrusion 123a-1 are respectively formed on both surfaces of the outer portion 123a. Accordingly, adhesion between the gasket 123 and the lower can 121 and the gasket 123 and the upper can 122 can be increased, and as a result, the electrolyte leakage can be largely prevented.
- the inner portion 123b is supported on the inner wall of the lower can 121 to prevent the electrode assembly 110 from coming into contact with the inner wall of the lower can 121 .
- the lower can 121 and the upper can 122 have a lower insertion groove 121a of a recessed type and an upper insertion groove 122a of a recessed type, respectively.
- the lower insertion groove 121a and the upper insertion groove 122a are spaced apart from each other so as not to face each other, so that when the lower can 121 and the upper can 122 are clamped, a portion of the gasket 123 is removed from the lower part.
- the insertion protrusion 123a can be formed while being introduced into the insertion groove 121a and the upper insertion groove 122a, and the adhesion between the lower can 121 and the upper can 122 through the insertion protrusion 123a and the The bonding strength can be increased.
- the method for manufacturing a button-type secondary battery according to the first embodiment of the present invention includes a preparation step (S10), an accommodation step (S20), an arrangement step (S30), and a clamping step (S40). includes
- a lower can 121 , an upper can 122 , and a gasket 123 disposed between the lower can 121 and the upper can 122 are prepared.
- the lower can 121 is formed with a receiving groove for accommodating the electrode assembly on the upper surface, and a recessed lower insertion groove 121a is formed on the outer circumferential surface.
- the lower insertion groove 121a is formed along the main surface of the lower can 121 and both ends are connected.
- the upper can 122 is formed with a coupling groove to which the lower can 121 is inserted into the bottom surface thereof, and an indented upper insertion groove 122a is formed on the inner circumferential surface of the upper can 122 , that is, on the wall surface of the coupling groove. do.
- the upper insertion groove 122a is formed along the main surface of the upper can 122 and both ends are connected.
- the gasket 123 includes an outer part 123a disposed between the lower can 121 and the upper can 122 , an inner part 123b disposed on the inner wall of the lower can 121 , and the outer part 123a . ) and a connecting portion 123c connecting the upper end of the inner portion 123b.
- the lower insertion groove 121a formed in the lower can 121 and the upper insertion groove 122a formed in the upper can 122 are spaced apart from each other so as not to face each other. That is, referring to FIG. 5 , the lower insertion groove 121a is located at the lower side, and the upper insertion groove 122a is formed to be located above the lower insertion groove 121a and spaced apart so as not to face each other.
- the lower insertion groove 121a and the upper insertion groove 122a are formed in a triangular shape. Accordingly, when the lower can 121 and the upper can 122 are clamped, the lower can 121 and the upper can 122 are formed. A portion of the gasket 123 disposed therebetween may be induced to smoothly flow into the bottom of the lower insertion groove 121a and the upper insertion groove 122a. That is, the insertion amount of the gasket inserted into the lower insertion groove 121a and the upper insertion groove 122a can be sufficiently secured.
- the inner surfaces of the lower insertion groove 121a and the upper insertion groove 122a facing the upper can 122 are formed in a horizontal plane perpendicular to the direction in which the upper can 122 is clamped, and the lower can 121 is formed.
- the facing inner surface may be formed as an inclined surface. That is, when clamping the lower can 121 and the upper can 122, a portion of the gasket 123 is guided along the inclined surface, and can be smoothly introduced to the bottom of the lower insertion groove 121a and the upper insertion groove 122a.
- the bondability between the lower can 121 and the upper can 122 can be increased through a portion of the gasket supported on the horizontal plane.
- the electrode assembly 110 in which the first electrode, the separator, and the second electrode are alternately stacked is accommodated in the receiving groove of the lower can 121 .
- a gasket 123 is disposed on the lower can 121 . Then, the outer part 123a of the gasket 123 is supported on the outer peripheral surface of the lower can 121 , the inner part 123b is supported on the inner peripheral surface of the lower can 121 , and the connection part 123c is the upper end of the lower can 121 . supported on the side.
- the upper can 122 is placed on the lower can 121 , and then the lower can 121 and the upper can 122 are clamped. That is, the button-type secondary battery 100 is manufactured by rolling the lower can 121 and the upper can 122 to be coupled to each other.
- the adhesion area between the lower can 121 and the gasket 123 is increased by the lower insertion protrusion 123a-1, and the adhesion and bonding force can be increased.
- the adhesion area between the upper can 122 and the gasket 123 is increased by the upper insertion protrusion 123a-2, and the adhesion and bonding force can be increased.
- the method for manufacturing a button-type secondary battery according to the first embodiment of the present invention can manufacture the button-type secondary battery 100 with increased bonding and adhesion.
- the button-type secondary battery 100 has a lower can 121 having the lower insertion groove 121a formed on the outer circumferential surface, and the upper insertion groove 122a on the inner circumferential surface. ) includes an upper can 122 formed thereon.
- the lower insertion groove (121a) or the upper insertion groove (122a) is provided in two or more, the two or more of the lower insertion groove (121a) or the upper insertion groove (122a) is the lower can (121) and
- the upper can 122 has a structure to be connected in a clamping direction. That is, two or more of the lower insertion grooves 121a or the upper insertion grooves 122a are provided to be connected in the vertical direction as seen in FIG. 9 .
- the button-type secondary battery 100 when the lower can 121 and the upper can 122 are clamped, a portion of the gasket 123 is formed in two or more of the lower insertion grooves 121a or the Two or more insertion protrusions 123a-1 are formed while being introduced into the upper insertion groove 122a, and accordingly, the coupling force and adhesion between the lower can 121 and the upper can 122 can be greatly increased.
- the two or more lower insertion grooves 121a or the two or more upper insertion grooves 122a are arranged in a direction in which the lower can 121 and the upper can 122 are clamped (a downward direction as viewed in FIG. 9 ). It is formed to gradually increase in size as it goes on.
- the two or more lower insertion grooves 121a and the two or more upper insertion grooves 122a are spaced apart from each other so as not to face each other. Accordingly, a portion of the gasket 123 may be induced to be smoothly introduced into the two or more lower insertion grooves 121a or the two or more upper insertion grooves 122a.
- the lower insertion groove 121a or the upper insertion groove 122a is provided in the lower can 121 and the upper can 122 in the preparation stage. ) in two or more.
- two or more of the lower insertion grooves 121a or two or more of the upper insertion grooves 122a are connected in a direction in which the lower can 121 and the upper can 121 are clamped, and are formed to gradually increase in size. do.
- a portion of the gasket 123 is introduced into the two or more lower insertion grooves 121a or the two or more upper insertion grooves 122a.
- Two or more insertion projections 123a are formed, and two or more insertion projections are formed, and the two or more insertion projections 123a greatly increase the bonding force and adhesion between the lower can 121 and the upper can 122 .
- the button-type secondary battery 100 includes a lower can 121 , an upper can 122 , and a gasket 123 , but the lower can 121 .
- the lower can 121 includes a lower insertion groove (121a) on the outer circumferential surface, and a pressing protrusion (121b) on the lower portion of the lower insertion groove (121a).
- the pressing protrusion 121b presses the surface of the gasket 123 provided between the lower can 121 and the upper can 122 to increase the fixing force of the gasket 123, and accordingly, When the can 121 and the upper can 122 are clamped, the gasket is prevented from being tensioned by the pressure protrusion to ensure a sufficient amount of the gasket 123 introduced into the lower insertion groove 121a and the upper insertion groove 122a.
- At least one, preferably, three or more pressing protrusions may be provided on the outer peripheral surface of the lower can.
- the outer peripheral surface of the pressing protrusion may be coated with a protective layer made of a synthetic resin material for preventing damage to the gasket.
- the pressing protrusion may be formed in a semicircular shape to prevent damage to the gasket.
- the button-type secondary battery 100 includes the pressing protrusion 121b on the lower can 121 so that the gasket 123 is closed when the lower can 121 and the upper can 122 are clamped.
- a portion of the gasket 123 can be more smoothly introduced into the lower insertion groove 121a and the upper insertion groove 122a while being partially compressed, and as a result, the bonding force and adhesion between the lower can 121 and the upper can 122 are improved. can be raised
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
Claims (12)
- 버튼형 이차전지로서,제1 전극단자를 겸하는 하부캔;상기 하부캔을 감싸는 형태로 결합되고, 제2 전극단자를 겸하는 상부캔; 및상기 하부캔과 상기 상부캔 사이에 구비되는 가스켓을 포함하며,상기 가스켓이 밀착되는 상기 하부캔의 표면과 상기 상부캔의 표면에는 만입형의 하부 삽입홈과 만입형의 상부 삽입홈이 각각 형성되고,상기 하부 삽입홈과 상기 상부 삽입홈은 서로 마주보지 않도록 이격되게 위치하는 버튼형 이차전지.
- 청구항 1에 있어서,상기 하부캔과 상기 상부캔의 클램핑에 의해 상기 가스켓의 일부가 상기 하부 삽입홈과 상기 상부 삽입홈에 도입되면서 상기 가스켓의 표면에 하부 삽입돌기와 상부 삽입돌기가 형성되고,상기 하부 삽입돌기에 의해 상기 하부캔과 상기 가스켓은 밀착 면적이 증대되고,상기 상부 삽입돌기에 의해 상기 상부캔과 상기 가스켓은 밀착 면적이 증대되는 버튼형 이차전지.
- 청구항 1에 있어서,상기 하부 삽입홈 또는 상기 상부 삽입홈은 바닥으로 갈수록 폭이 점차 작아지는 삼각형태를 가지는 버튼형 이차전지.
- 청구항 1에 있어서,상기 하부 삽입홈 또는 상기 상부 삽입홈은 2개 이상으로 마련되고,2개 이상의 상기 하부 삽입홈 또는 2개 이상의 상기 상부 삽입홈은 상기 하부캔과 상기 상부캔이 클램핑되는 방향으로 연결되게 마련되는 버튼형 이차전지.
- 청구항 4에 있어서,2개 이상의 상기 하부 삽입홈 또는 2개 이상의 상기 상부 삽입홈은 상기 하부캔과 상기 상부캔이 클램핑되는 방향으로 갈수록 크기가 점차 증대되게 마련되는 버튼형 이차전지.
- 청구항 1에 있어서,상기 가스켓은 상기 하부캔과 상기 상부캔 사이에 구비되는 외측부와, 상기 하부캔의 내벽에 지지되는 내측부와, 상기 외측부의 상단과 상기 내측부의 상단을 연결하는 연결부를 포함하는 버튼형 이차전지.
- 청구항 1에 있어서,상기 하부캔에는 상기 하부캔과 상기 상부캔 사이에 구비된 상기 가스켓을 가압하는 가압돌기가 형성되는 버튼형 이차전지.
- 만입형 하부 삽입홈이 형성된 하부캔, 만입형 상부 삽입홈이 형성된 상부캔, 및 상기 하부캔과 상기 상부캔 사이에 배치되는 가스켓을 준비하는 준비단계;제1 전극, 분리막 및 제2 전극이 교대로 적층된 전극조립체를 상기 하부캔에 수용하는 수용단계;상기 하부캔의 상부에 가스켓을 배치하되, 상기 가스켓은 하부캔의 외주면에 지지되는 외측부, 하부캔의 내주면에 지지되는 내측부 및 상기 외측부와 상기 내측부를 연결하는 연결부로 형성되는 배치단계; 및상기 하부캔의 상부에 상기 상부캔을 배치한 다음, 상기 하부캔과 상기 상부캔을 클램핑하여 버튼형 이차전지를 제조하는 클램핑단계를 포함하며,상기 준비단계에서, 상기 하부캔에 형성된 상기 하부 삽입홈과 상기 상부캔에 형성된 상기 상부 삽입홈은 상기 하부캔과 상기 상부캔이 결합되었을 때 서로 마주보지 않고 이격되게 위치하도록 형성하는 버튼형 이차전지 제조방법.
- 청구항 8에 있어서,상기 클램핑단계는 상기 하부캔과 상기 상부캔을 클램핑하면 상기 가스켓의 일부가 상기 하부 삽입홈과 상기 상부 삽입홈에 도입되면서 상기 가스켓의 표면에 하부 삽입돌기와 상부 삽입돌기가 형성되며,상기 하부 삽입돌기에 의해 상기 하부캔과 상기 가스켓은 밀착 면적이 증대되고,상기 상부 삽입돌기에 의해 상기 상부캔과 상기 가스켓은 밀착 면적이 증대되는 버튼형 이차전지 제조방법.
- 청구항 8에 있어서,상기 하부 삽입홈 또는 상기 상부캔의 삽입홈은 바닥으로 갈수록 폭이 점차 작아지는 삼각형태를 가지는 버튼형 이차전지 제조방법.
- 청구항 8에 있어서,상기 준비단계에서 상기 하부 삽입홈 또는 상기 상부 삽입홈은 2개 이상으로 마련되고,2개 이상의 상기 하부 삽입홈 또는 2개 이상의 상기 상부 삽입홈은 상기 하부캔과 상기 상부캔이 클램핑되는 방향으로 연결되게 형성되는 버튼형 이차전지 제조방법.
- 청구항 8에 있어서,상기 준비단계는 상기 하부 삽입홈 하부의 상기 하부캔에 상기 가스켓을 가압하는 가압돌기를 형성하고,상기 클램핑단계는 상기 하부캔과 상기 상부캔의 클램핑시 상기 가압돌기에 의해 상기 가스켓의 하부가 고정됨에 따라 상기 가스켓이 상기 상부캔 및 상기 하부캔 방향으로 확장되면서 상기 하부 삽입홈과 상기 상부 삽입홈에 도입되는 버튼형 이차전지 제조방법.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP21831925.9A EP4057430A4 (en) | 2020-07-01 | 2021-07-01 | BUTTON-TYPE SECONDARY BATTERY AND ITS MANUFACTURING METHOD |
JP2022541943A JP7463646B2 (ja) | 2020-07-01 | 2021-07-01 | ボタン型二次電池及びその製造方法 |
US17/782,565 US20240194989A1 (en) | 2020-07-01 | 2021-07-01 | Button-type secondary battery and method for manufacturing the same |
CN202180007437.6A CN114846678A (zh) | 2020-07-01 | 2021-07-01 | 纽扣式二次电池及其制造方法 |
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KR10-2020-0081088 | 2020-07-01 | ||
KR20200081088 | 2020-07-01 | ||
KR10-2021-0086300 | 2021-07-01 | ||
KR1020210086300A KR20220003473A (ko) | 2020-07-01 | 2021-07-01 | 버튼형 이차전지 및 그의 제조방법 |
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KR20190010566A (ko) * | 2017-06-20 | 2019-01-30 | 이브 에너지 씨오., 엘티디. | 단추형 리튬 셀 실링구조 및 실링방법 |
CN208819929U (zh) * | 2018-06-15 | 2019-05-03 | 宜昌力佳科技有限公司 | 一种扣式电池 |
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JPS59160953A (ja) * | 1983-03-04 | 1984-09-11 | Yuasa Battery Co Ltd | アルカリ電池の製造法 |
JPS59173946A (ja) * | 1983-03-23 | 1984-10-02 | Seiko Instr & Electronics Ltd | ボタン型アルカリマンガン電池 |
JPH0945297A (ja) * | 1995-07-31 | 1997-02-14 | Matsushita Electric Ind Co Ltd | ボタン形アルカリ電池 |
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2021
- 2021-07-01 JP JP2022541943A patent/JP7463646B2/ja active Active
- 2021-07-01 US US17/782,565 patent/US20240194989A1/en active Pending
- 2021-07-01 WO PCT/KR2021/008376 patent/WO2022005232A1/ko active Application Filing
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KR20050052218A (ko) * | 2003-11-29 | 2005-06-02 | 삼성에스디아이 주식회사 | 가스켓과 이를 이용한 이차전지 |
KR20160022137A (ko) * | 2014-08-19 | 2016-02-29 | 주식회사 엘지화학 | 안정성이 향상된 원통형 리튬 이차전지 |
KR20180036086A (ko) * | 2016-09-30 | 2018-04-09 | 주식회사 엘지화학 | 그루브가 형성되어 있는 금속 캔을 포함하는 원통형 전지셀 |
KR20190010566A (ko) * | 2017-06-20 | 2019-01-30 | 이브 에너지 씨오., 엘티디. | 단추형 리튬 셀 실링구조 및 실링방법 |
CN208819929U (zh) * | 2018-06-15 | 2019-05-03 | 宜昌力佳科技有限公司 | 一种扣式电池 |
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JP2023511261A (ja) | 2023-03-17 |
JP7463646B2 (ja) | 2024-04-09 |
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