WO2023059068A1 - 파우치형 이차전지의 파우치 실링방법 및 이 방법에 사용되는 메인 실링 도구 - Google Patents
파우치형 이차전지의 파우치 실링방법 및 이 방법에 사용되는 메인 실링 도구 Download PDFInfo
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- WO2023059068A1 WO2023059068A1 PCT/KR2022/015004 KR2022015004W WO2023059068A1 WO 2023059068 A1 WO2023059068 A1 WO 2023059068A1 KR 2022015004 W KR2022015004 W KR 2022015004W WO 2023059068 A1 WO2023059068 A1 WO 2023059068A1
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- Prior art keywords
- sealing
- pouch
- secondary battery
- type secondary
- main
- Prior art date
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 195
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000003825 pressing Methods 0.000 claims description 37
- 238000007872 degassing Methods 0.000 claims description 30
- 230000008569 process Effects 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 230000005684 electric field Effects 0.000 claims 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 6
- 229910052744 lithium Inorganic materials 0.000 description 6
- 239000005022 packaging material Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000001994 activation Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000006182 cathode active material Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000003860 storage Methods 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
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/345—Progressively making the joint, e.g. starting from the middle
- B29C66/3452—Making complete joints by combining partial joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
-
- 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
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/049—Processes for forming or storing electrodes in the battery container
-
- 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
- H01M50/105—Pouches or flexible bags
-
- 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
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
-
- 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
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
- H01M50/557—Plate-shaped terminals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3468—Batteries, accumulators or fuel cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7146—Battery-cases
-
- 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 method for sealing a pouch of a pouch-type secondary battery and a main sealing tool used in the method.
- Lithium secondary batteries which are attracting attention as a next-generation power source among rechargeable secondary batteries, have high energy density, no memory effect, and are very light and have a small degree of spontaneous discharge even when not in use, making them suitable for portable electronic devices such as laptops, cameras, and mobile phones. It is used a lot.
- the frequency of use is gradually increasing in the defense industry, automation system, automobile, and aviation industries, and in particular, it is widely used as a motor driving source for electric vehicles and hybrid vehicles.
- lithium secondary batteries can generally be classified into a lithium ion battery using a liquid electrolyte and a lithium polymer battery using a polymer electrolyte, depending on the type of electrolyte solution.
- these secondary batteries are manufactured in various shapes, and can be largely classified into cylindrical, prismatic, and pouch types.
- the pouch-type lithium secondary battery case is composed of a pouch packaging material that is noticeably lighter and more flexible than an aluminum case, and may have a higher energy density than a prismatic lithium secondary battery.
- a sealing portion is formed at the edge of the packaging material in order to seal the pouch exterior material. This edge increases the dead space of the secondary battery and lowers the energy density per volume, so that the edge sealing portion is bent.
- a technology for increasing the energy density of a secondary battery by folding or folding is being used.
- a method of maximally reducing the ratio of dead space due to the sealing portion formed at the edge compared to the packaging material having the same size by forming a sealing portion having a predetermined width at the edge of the packaging material as close to the electrode assembly as possible is also applied.
- Korean Patent Registration No. 10-0883919 discloses a technique of folding the sealing parts of the left and right edges and folding the sealing parts of the upper edges, cutting the corner where the left and right sealing parts and the upper sealing parts intersect. .
- the corner where both sealing parts and the upper sealing part intersect is cut, there is a problem in that the sealing reliability of the exterior material deteriorates, and the upper sealing part is bent along a bending line that is too close to the electrode assembly accommodated in the exterior material.
- problems such as damage to the connection of the tab-lead coupling part inside the exterior material or a short circuit between the electrode assembly and the electrode tab may be caused.
- the present invention was made to solve the above problems of the prior art,
- An object of the present invention is to provide a method for sealing a pouch of a pouch-type secondary battery capable of ensuring excellent sealing and insulating properties while maximally reducing the dead space ratio by the sealing portion of the pouch-type secondary battery, and a sealing tool used in the method. .
- the degassing sealing includes a full-width sealing portion including an electrode terminal sealing portion, and a horizontal sealing portion formed in a horizontal direction from the electrode terminal to the end of the dead space, and in the opposite direction of the horizontal sealing portion, a light is applied between the electrode terminal and the end portion toward the battery compartment. It is performed to include an inclined sealing portion including a photo inclined portion,
- the main sealing performs parallel sealing in parallel with the electrode assembly accommodating portion in the entire length direction, and at the same time, performs a function of correcting the horizontal sealing portion of the full width sealing portion to be symmetrical with the inclined sealing portion in the opposite direction.
- a pouch sealing method is provided.
- a process of forming the inclined portion by symmetrically removing the inclined sealing portion and the outer horizontal portion of the correcting portion may be further performed.
- the pouch-type secondary battery may have electrode terminals formed in only one direction or present in both directions symmetrical to each other.
- the degassing sealing may include sealing an end portion of the dead space in the longitudinal direction in a straight line in the longitudinal direction.
- the degassing sealing includes sealing the distal end of the battery compartment in the longitudinal direction in a straight line in the longitudinal direction, or the distal end of the battery compartment in the longitudinal direction is sealed by the structure of the pouch case. In some cases, the sealing may not be included.
- the present invention is a sealing tool used for the main sealing
- a linear pressing unit that performs parallel sealing in parallel with the electrode assembly accommodating unit in the entire length direction; and an inclined pressing unit coupled to one end of the linear pressing unit so that an internal angle is greater than 90 degrees to 150 degrees,
- the inclined pressing part provides a main sealing tool, characterized in that it performs a function of correcting the horizontal sealing part of the full width sealing part to be symmetrical with the inclined sealing part in the opposite direction.
- the other end of the linear pressing portion may be further coupled with an inclined pressing portion coupled in the same direction and at the same internal angle.
- the inclined pressing portion may have a shape similar to a triangular prism or a quadrangular prism.
- the main sealing tool may further include an extension portion in which the straight pressing portion extends further to the outside of the inclined pressing portion.
- the pouch sealing method of the pouch-type secondary battery of the present invention provides excellent sealing performance and insulation while maximally reducing the dead space ratio by the sealing portion.
- the pouch sealing tool used in the method effectively reduces the dead space ratio and provides excellent sealing and insulating properties to the pouch case.
- 1 is a photograph of the shape of a pouch-type secondary battery with reduced dead space
- FIG. 2 is a view schematically showing the form of degassing sealing performed in the process of manufacturing a pouch-type secondary battery of the form shown in FIG. 1;
- FIG. 3 is a diagram showing the cause of deterioration in sealing and insulating properties caused by degassing sealing in the form of FIG. 2;
- FIG. 4 is a view showing an embodiment of degassing sealing among pouch sealing of a pouch-type secondary battery of the present invention
- FIG. 5 is a view showing an embodiment of the main sealing of the pouch sealing of the pouch-type secondary battery of the present invention
- FIG. 6 is an enlarged view of one embodiment of the main sealing of the pouch sealing of the pouch-type secondary battery of the present invention.
- FIG. 7 is a view showing an effect according to an embodiment of degassing sealing among pouch sealing of a pouch-type secondary battery of the present invention.
- FIG. 8 is a perspective view showing a seal form of a main sealing tool used for main sealing among pouch sealing of a pouch-type secondary battery of the present invention
- FIG. 9 is a view showing a photo taken of the actual form of the main sealing tool used for main sealing of the pouch sealing of the pouch type secondary battery of the present invention and its material.
- a pouch-type secondary battery having a structure as shown in FIG. 1 is being manufactured.
- the sealing in the form shown in FIG. 2 is performed during degassing and sealing.
- portion (2) the space between the corner portion of the electrode assembly on the side where the electrode terminal is located and the sealing portion is formed narrow (portion (2)). Therefore, after the formation process, when the gas present in the electrode assembly accommodating part escapes into the narrow space during the cell press process, a large pressure is formed, and due to this pressure, damage to the inclined sealing part on the dead space side occurs. Insulation of the sealing portion is also reduced.
- FIG. 4 is a view showing an embodiment of degassing sealing among pouch sealing of a pouch-type secondary battery of the present invention
- FIG. 5 shows an embodiment of main sealing among pouch sealing of a pouch-type secondary battery of the present invention. It is a drawing
- the degassing sealing is a horizontal sealing part 10 including an electrode terminal sealing part 11 formed in a horizontal direction from the electrode terminal 2 to the end of the dead space 1
- An inclined sealing part 13 including a sealing part 12 and including an inclined part inclined toward the battery accommodating part 3 between the electrode terminal 1 and the distal end in the opposite direction of the horizontal sealing part 12 is performed to include
- the main sealing performs parallel sealing 21 in parallel with the electrode assembly accommodating part 3 in the full length direction, and at the same time, the horizontal sealing part 12 of the full width sealing part is moved in the opposite direction. It is characterized in that it includes correcting (22) to be symmetrical with the inclined sealing portion (13).
- the outer horizontal portion 15 of the inclined sealing portion 13 and the correcting portion 22 may be symmetrically removed to form an inclined portion (chamfering process) may be further included.
- the dead space 1 may be removed by cutting before or after main sealing.
- the main sealing may be performed using the main sealing tool 100 shown in FIGS. 8 and 9 .
- the main sealing tool 100 is a straight pressing part that performs parallel sealing 21 parallel to the electrode assembly accommodating part 3 in the entire length direction (formation of parallel sealing part 20). (110); and an inclined pressing portion 120 coupled to one end of the linear pressing portion such that an interior angle is greater than 90 degrees to 150 degrees, more preferably 100 degrees to 130 degrees.
- the inclined pressing portion 120 is used to correct the horizontal sealing portion 12 of the full width sealing portion 10 to be symmetrical with the inclined sealing portion 13 in the opposite direction.
- An inclined pressing part 120' coupled in the same direction and at the same inner angle may be further coupled to the other end of the straight pressing part 110.
- the main sealing is to correct the horizontal sealing portion 12 of the full width sealing portion 10 to be symmetrical with the inclined sealing portion 13 in the opposite direction (22)
- the inclined part pressing part 120 of the main sealing tool 100 is applied only to the remaining inclined part except for the horizontal sealing part 12 of the degassing sealing, or the horizontal It can be applied to the sealing part 12 and the inclined part at the same time.
- the pouch-type secondary battery may have electrode terminals 2 formed in only one direction or present in both directions symmetrical to each other.
- the full-width sealing portion 10 on both sides may be performed in the same form and in the same method.
- the degassing sealing may include forming a degassing sealing portion (FIGS. 4 and 30) in the longitudinal direction by sealing the distal end of the dead space 1 in the longitudinal direction in a straight line in the longitudinal direction.
- the degassing sealing includes sealing the battery compartment distal end (opposite to the dead space) in a straight line in the battlefield direction, or the battery compartment distal end is attached to the structure of the pouch case. In the case of being sealed by (see FIG. 4), the sealing may not be included.
- the pouch sealing method of the pouch type secondary battery of the present invention as shown in FIG. 7 , a flow path through which gas can escape from the battery compartment 3 to the dead space 1 is sufficiently formed in the degassing process. do.
- the cross-sectional area of the space where the battery compartment 3 is located is increased by 9.43%, , The effect of increasing the cross-sectional area of the dead space 1 by 3.99% is also provided.
- the degassing sealing of step (a) is a step of performing sealing including a dead space in order to perform a degassing process for removing gas generated after performing the formation process, Except for forming the horizontal sealing portion 12 described in may be carried out in a method known in the art.
- the formation process of step (b) and the degassing process of step (c) may be performed by methods known in the art.
- the formation process means a process that is also called an activation process in this field.
- the activation process for the activation of the cathode active material and the formation of a stable SEI (Solid Electrolyte Interface) film at the first cycle must be preceded.
- This activation process generates a large amount of gas, exist within This gas must be removed through openings or incisions formed in the gas pocket (dad space) of the packaging material, and the packaging material is heat-sealed and sealed to form the final product (main sealing).
- the process of discharging the gas inside the secondary battery as described above is called a degassing process.
- FIG. 8 is a perspective view showing a seal form of a main sealing tool 100 used for main sealing among pouch sealing of a pouch-type secondary battery of the present invention
- FIG. 9 is a photograph of the actual form of the main sealing tool and its It is a drawing showing the resources.
- the main sealing tool of the present invention includes a linear pressing part 110 that performs parallel sealing (Figs. 5 and 20) in parallel with the electrode assembly accommodating part in the entire length direction; degree, more preferably includes an inclined pressing portion 120 coupled to be 100 to 130 degrees, and the inclined pressing portion 120 seals the horizontal sealing portion 12 of the full width sealing portion 10 in the opposite direction. It is characterized in that it performs a function of correcting to be symmetrical with the unit 13.
- the shape of the linear pressing portion 110 is not particularly limited as long as it is possible to perform the parallel sealing 21 (forming the parallel sealing portion 20), but, for example, a square pillar can have a shape.
- an inclined pressing part 120' coupled in the same direction and at the same internal angle may be further coupled to the other end of the linear pressing part 110.
- the inclined pressing part 120 is not particularly limited as long as it can form the correcting inclined sealing part 14 as shown in FIG. 5, but shown in FIGS. 8 and 9 As shown, it may have a shape similar to a triangular prism, and may specifically have a right-angled triangular prism shape. However, since the correction inclined sealing portion 14 can be formed even in the case of a rectangular pillar shape, the shape is not particularly limited.
- the straight pressing part 110 extends further to the outside of the inclined pressing part 120.
- a portion 130 may be further included.
- the extension part 130 may perform a function of coupling the main sealing tool 100 to the pressing device.
- Battery storage unit 10 Full width sealing unit
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
Claims (9)
- (a) 대드 스페이스를 포함하여 디개싱 실링을 수행하는 단계;(b) 포메이션 공정을 수행하는 단계;(c) 디개싱 공정을 수행하는 단계; 및(d) 메인 실링을 수행하는 단계를 포함하며,상기 디개싱 실링은 전극 단자 실링부를 포함하는 전폭 실링부가, 전극 단자로부터 대드 스페이스 말단부까지 수평방향으로 형성된 수평 실링부를 포함하고, 상기 수평 실링부의 반대 방향에는 전극 단자로부터 말단부 사이에 전지 수납부를 향하여 경사진 경사부를 포함하는 경사 실링부를 포함하도록 수행되며,상기 메인 실링은 전극 조립체 수납부와 전장 방향으로 평행한 평행 실링을 수행하고, 이와 함께 상기 전폭 실링부의 수평 실링부를 반대 방향 경사 실링부와 대칭되도록 보정하는 실링을 수행하는 것을 포함하는 파우치형 이차전지의 파우치 실링방법.
- 제1항에 있어서,상기 메인 실링 후, 상기 경사 실링부와 보정부의 바깥부분 수평부를 대칭되게 제거하여 경사부를 형성하는 것을 특징으로 하는 파우치형 이차전지의 파우치 실링방법.
- 제1항에 있어서,상기 파우치형 이차 전지는 전극 단자가 한 방향에만 형성되거나 서로 대칭되는 양방향에 존재하는 것을 특징으로 하는 파우치형 이차전지의 파우치 실링방법.
- 제1항에 있어서,상기 디개싱 실링은 전장 방향 대드 스페이스 말단부를 전장 방향으로 일직선으로 실링하는 것을 포함하는 것을 특징으로 하는 파우치형 이차전지의 파우치 실링방법.
- 제1항에 있어서,상기 디개싱 실링은 전장 방향 전지 수납부 말단부를 전장 방향으로 일직선으로 실링하는 것을 포함하거나, 상기 전장 방향 전지 수납부 말단부가 파우치 케이스의 구조에 의해 밀봉된 상태인 경우에는 상기 실링을 포함하지 않는 것을 특징으로 하는 파우치형 이차전지의 파우치 실링방법.
- 제1항의 메인 실링에 사용되는 실링 도구로서,전극 조립체 수납부와 전장 방향으로 평행한 평행 실링을 수행하는 직선 가압부;와 상기 직선 가압부의 일단부에 내각이 90도 초과 내지 150도가 되도록 결합된 경사 가압부를 포함하며,상기 경사 가압부는 전폭 실링부의 수평 실링부를 반대 방향 경사 실링부와 대칭되도록 보정하는 기능을 수행하는 것을 특징으로 하는 메인 실링 도구.
- 제6항에 있어서,상기 직선 가압부의 타단부에는 동일한 방향 및 동일한 내각으로 결합된 경사 가압부가 더 결합된 것을 특징으로 하는 메인 실링 도구.
- 제6항 또는 제7항에 있어서,상기 경사 가압부는 삼각 기둥 또는 사각 기둥 유사 형태인 것을 특징으로 하는 메인 실링 도구.
- 제6항 또는 제7항에 있어서,상기 메인 실링 도구는 직선 가압부가 상기 경사 가압부의 외부로 더 연장된 연장부를 더 포함하는 메인 실링 도구.
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JP2023574769A JP2024520726A (ja) | 2021-10-06 | 2022-10-05 | ポーチ型二次電池のポーチシーリング方法及びこの方法に利用されるメインシーリング道具 |
EP22878889.9A EP4336635A1 (en) | 2021-10-06 | 2022-10-05 | Method for sealing pouch of pouch-type secondary battery and main sealing tool used in same method |
CN202280039541.8A CN117413414A (zh) | 2021-10-06 | 2022-10-05 | 用于袋型二次电池的袋密封方法及在该方法中使用的主密封工具 |
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KR1020210132371A KR20230049348A (ko) | 2021-10-06 | 2021-10-06 | 파우치형 이차전지의 파우치 실링방법 및 이 방법에 사용되는 메인 실링 도구 |
KR10-2021-0132371 | 2021-10-06 |
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JP (1) | JP2024520726A (ko) |
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WO (1) | WO2023059068A1 (ko) |
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KR100883919B1 (ko) | 2006-04-03 | 2009-02-18 | 주식회사 엘지화학 | 우수한 용적율의 전지팩 |
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KR20190023649A (ko) * | 2017-08-29 | 2019-03-08 | 주식회사 엘지화학 | 2단계의 실링 과정을 포함하는 파우치형 전지의 사이드부 실링 방법 |
CN209785987U (zh) * | 2019-06-26 | 2019-12-13 | 宁德时代新能源科技股份有限公司 | 二次电池 |
US20210013538A1 (en) * | 2019-07-08 | 2021-01-14 | Jiangsu Contemporary Amperex Technology Limited | Secondary battery |
KR20210132371A (ko) | 2020-04-27 | 2021-11-04 | 주식회사 엘엑스세미콘 | 방습 칩 온 필름 패키지 및 그의 제조 방법 |
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2021
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2022
- 2022-10-05 JP JP2023574769A patent/JP2024520726A/ja active Pending
- 2022-10-05 CN CN202280039541.8A patent/CN117413414A/zh active Pending
- 2022-10-05 WO PCT/KR2022/015004 patent/WO2023059068A1/ko active Application Filing
- 2022-10-05 EP EP22878889.9A patent/EP4336635A1/en active Pending
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KR100883919B1 (ko) | 2006-04-03 | 2009-02-18 | 주식회사 엘지화학 | 우수한 용적율의 전지팩 |
KR20150037077A (ko) * | 2013-09-30 | 2015-04-08 | 주식회사 엘지화학 | 이차전지의 제조 방법 |
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KR20210132371A (ko) | 2020-04-27 | 2021-11-04 | 주식회사 엘엑스세미콘 | 방습 칩 온 필름 패키지 및 그의 제조 방법 |
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EP4336635A1 (en) | 2024-03-13 |
CN117413414A (zh) | 2024-01-16 |
JP2024520726A (ja) | 2024-05-24 |
KR20230049348A (ko) | 2023-04-13 |
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