[go: up one dir, main page]

WO2016159607A1 - Sealing apparatus of pouch-type rechargeable battery - Google Patents

Sealing apparatus of pouch-type rechargeable battery Download PDF

Info

Publication number
WO2016159607A1
WO2016159607A1 PCT/KR2016/003121 KR2016003121W WO2016159607A1 WO 2016159607 A1 WO2016159607 A1 WO 2016159607A1 KR 2016003121 W KR2016003121 W KR 2016003121W WO 2016159607 A1 WO2016159607 A1 WO 2016159607A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing
lead
pouch
blocks
guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2016/003121
Other languages
French (fr)
Korean (ko)
Inventor
임성윤
김지현
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Chem Ltd
Original Assignee
LG Chem Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020160030974A external-priority patent/KR101852250B1/en
Application filed by LG Chem Ltd filed Critical LG Chem Ltd
Priority to EP16773388.0A priority Critical patent/EP3249732B1/en
Priority to JP2017547524A priority patent/JP6549243B2/en
Priority to US15/556,170 priority patent/US10547034B2/en
Priority to CN201680016695.XA priority patent/CN107408720B/en
Publication of WO2016159607A1 publication Critical patent/WO2016159607A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • 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
    • B29C66/40—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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/81431—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 comprising a single cavity, e.g. a groove
    • 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
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool 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
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29C66/81415—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 being bevelled
    • B29C66/81419—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 being bevelled and flat
    • 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
    • B29C66/81425—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 being stepped, e.g. comprising a shoulder
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/02—Aluminium
    • 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
    • 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 sealing apparatus for manufacturing a pouch type secondary battery, and more particularly to a sealing apparatus for manufacturing a pouch type secondary battery with improved sealing portion of the pouch case and the lid.
  • Secondary batteries that can be charged and discharged are being actively researched due to the development of high-tech fields such as digital cameras, cell phones, laptops and hybrid cars.
  • Examples of secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-hydrogen batteries, and lithium secondary batteries.
  • lithium secondary batteries are used as a power source for portable electronic devices, or are used in high-power hybrid vehicles by connecting a plurality of them in series, and the operating voltage is three times higher than that of nickel-cadmium batteries or nickel-metal hydride batteries.
  • the energy density per unit weight is also excellent and is being used rapidly.
  • Such a lithium secondary battery can be manufactured in various forms such as cylindrical type and prismatic type. Recently, a pouch type secondary battery manufactured in a pouch type having flexibility has been spotlighted.
  • FIG. 1 illustrates a general pouch type secondary battery 10 and a sealing device 20 for sealing the pouch type secondary battery 10.
  • the pouch type secondary battery 10 includes a pouch case and a lead 17 formed of an upper pouch 15a and a lower pouch 15b.
  • the lid 17 extends from an electrode assembly (not shown) embedded in the pouches 15a and 15b so as to protrude outward from the pouches 15a and 15b.
  • a sealing portion 15 is formed along the edges of the pouches 15a and 15b to seal the pouches 15a and 15b.
  • the sealing device 20 is installed on the upper and lower portions of the pouch sealing portion 15 so as to be elevated by the elevating means 30 to press the sealing portion 15 by elevating. At this time, the sealing device 20 generates heat by the built-in heating means (not shown) to heat the sealing unit 15. That is, the sealing device 20 is sealed while the polymers of the pouches 15a and 15b are fused by heat-pressurizing the sealing unit 15.
  • a thin resin layer is formed on the lid 17 as shown in FIG. 2.
  • Film 18 is coated and applied to the sealing process.
  • (A) is a top view of a lead
  • (b) is B-B 'sectional drawing of (a).
  • the lead 17 having a thickness of 50 ⁇ m to 1000 ⁇ m is usually interposed in the pouches 15a and 15b of the upper and lower sides as shown in FIG. 3 even though the film 18 is coated as described above. Since the pouches at the portions corresponding to both sides of 17) are not completely bonded by the heat-sealing sealing apparatus, the electrolyte leaks. That is, since the lid 17 has the predetermined thickness mentioned above, even if the pouches 15a and 15b are joined, the joined portion is lifted by the thickness of the lid 17. As described above, when the upper and lower cases around the lead 17 are incompletely bonded, electrolyte is leaked around the lead, thereby causing a problem of lowering electrical characteristics due to charge and discharge of the secondary battery. In order to solve this problem, an improved sealing apparatus for sealing with the lid 17 in between is known and shown in FIG.
  • the sealing device 40 includes upper and lower heating blocks 41 and 42 provided with heating means (not shown), and corresponds to the lid 17 interposed in the upper and lower cases 15a and 15b.
  • the heating blocks 41 and 42 are formed with sealing grooves 41a and 42a in which the lid 17 is seated upon sealing.
  • the sealing grooves 41a and 42a are configured such that the lid 17 is seated so that portions other than the lid 17 are sufficiently pressurized and sealed. And the lid 17 is sealed in the state compensated by the sealing grooves 41a and 42a by the thickness thereof.
  • the sealing grooves 41a and 42a have a margin considering the tolerance in the cross-sectional shape of the lead 17 as shown in FIG. (d)
  • the sealing grooves 41a and 42a have a width length of about 10% wider than the width length of the lid 17.
  • the sealing process may proceed even if the position where the lid 17 is not fixed is constant. However, due to such a clearance, there is a non-sealing portion that is not pressurized by the sealing device 40 by the difference in the width lengths of the sealing grooves 41a and 42a and the lid 17, that is, the clearance. As the thickness of the lid 17 increases, the unsealed portion also increases as the depth and width of the sealing grooves 41a and 42a increase. In addition, when the sealing condition or the lead condition is changed, as shown in FIG. 6, the voids and gaps of the sealing groove 42a and the film 18 may not be filled, so that the electrolyte may be leaked without causing a complete sealing to act as a factor that causes defects. do.
  • the problem to be solved by the present invention is to provide a sealing device of a pouch-type secondary battery that can prevent the leakage of the electrolyte solution by allowing the lead to always be constantly positioned in the sealing groove and completely sealed.
  • the sealing device in the sealing device of the pouch-type secondary battery for sealing the pouch case in which the electrode assembly is embedded, the sealing device comprises a top and bottom sealing block, the top and bottom sealing block At least one of the sealing blocks is formed with a sealing groove including a diagonal stepped portion at a position corresponding to the lead of the pouch-type secondary battery, the lead guide for mounting the lead in the sealing groove is installed in front of the sealing block It is characterized by.
  • the lead guide is preferably a pair of blocks that form a separation space into which the lead can enter.
  • the edge portion toward the lead in the block may be chamfered and tapered.
  • the separation space may be designed to be spaced apart from the width of the lead by 0.1mm to 2.0mm range.
  • the lead guide may determine the position of the lead before the sealing block. Instead, the lead guide may be applied simultaneously with the sealing block to determine the position of the lead.
  • the block is approximately hexahedral in shape, and the tapered slope may be flat, convex up or concave down.
  • the lead guide may be operated in the vertical direction while maintaining the separation space to determine the position of the lead.
  • the lead guide may operate in the horizontal direction to determine the position of the lead so as to fit the separation space.
  • the lead guide may be operated by pivoting to determine the position of the lead to fit the spacing space.
  • the accuracy in which the lead is positioned in the sealing groove during the sealing process is significantly increased. Due to this, the gap between the sealing groove and the film can be minimized, so that the pouch sealing portion is formed evenly and can be completely sealed. Therefore, the electrolyte inside the pouch can be prevented from leaking to the outside, and the sealing property and reliability of the pouch type secondary battery can be improved.
  • FIG. 1 illustrates a general pouch type secondary battery and a sealing device.
  • FIG. 2 shows a state in which a film of a thin resin layer is coated on a lead.
  • FIG 3 is a cross-sectional view showing a lead portion when sealing with a conventional sealing device.
  • FIG. 4 shows another conventional sealing device provided with a sealing groove.
  • 5 and 6 are views for explaining a problem that a gap occurs between the sealing groove and the lead film in the conventional sealing device.
  • FIG. 7 is a schematic perspective view of a sealing apparatus according to the present invention.
  • FIG. 8 is a front view of a state in which a lead is seated on the sealing apparatus of FIG. 7, and FIG. 9 is a cross-sectional view.
  • FIG. 10 is a cross-sectional view for showing various configurations of the lead guide that can be included in the sealing apparatus according to the present invention.
  • FIG. 11 is a view for explaining various operating methods of the lead guide that can be included in the sealing apparatus according to the present invention.
  • FIG. 7 is a schematic perspective view of a sealing apparatus according to the present invention.
  • 8 is a front view of a state in which a lead is seated on the sealing apparatus of FIG. 7, and
  • FIG. 9 is a cross-sectional view.
  • the sealing device 140 is the upper and lower sealing blocks (141, 142) so that two bars of the bar (bar-type) can be thermally compressed by the sealing portion up and down the pouch It includes.
  • the upper and lower sealing blocks 141 and 142 are formed with sealing grooves 141a and 142a including diagonal stepped portions at positions corresponding to the leads 117 of the pouch type secondary battery.
  • the lead guide 160 is installed in front of the sealing blocks 141 and 142 to allow the lid 117 to be seated in the sealing grooves 141a and 142a.
  • the sealing blocks 141 and 142 are installed to be able to move up and down.
  • the elevating means may be provided by a cylinder or the like that is widely used, and is not necessarily limited thereto, and includes all means for raising and lowering the sealing blocks 141 and 142.
  • the sealing device 140 may be one in which the sealing grooves 141a and 142a are formed at positions corresponding to the leads of the lithium secondary battery, that is, the unidirectional battery, in which the leads protrude in the same direction. Instead, the sealing device 140 may be one in which the sealing grooves 141a and 142a are formed at positions corresponding to the leads of the lithium secondary battery, that is, the bidirectional battery, in which the leads protrude in different directions.
  • the sealing grooves 141a and 142a may be formed only on either of the sealing blocks 141 and 142.
  • the depths of the sealing grooves 141a and 142a may be formed to have a depth equal to 1/2 to a thickness of the lead.
  • each depth of the sealing grooves 141a and 142a may be formed to a depth that is 1/2 of the lead thickness. have.
  • the sealing grooves 141a and 142a have diagonal stepped portions as shown.
  • the diagonal stepped portion may be formed in two or more steps.
  • the sealing device 140 allows the sealing to be made in a state in which a lead extending from the electrode assembly embedded in the pouch case is seated on the sealing grooves 141a and 142a.
  • the electrode assembly comprises a jelly roll-type electrode assembly wound by sequentially stacking one or more cathode, separator, anode;
  • a stack & folding electrode assembly in which a unit cell in which a cathode, a separator, and an anode are sequentially stacked is disposed on a separator having a long film form and then wound in a single direction;
  • the negative electrode, the separator, and the positive electrode may be any one of a stack & folding electrode assembly in which a unit cell in which a cathode is sequentially stacked is disposed in a long film type separator and wound in a zigzag direction.
  • the unique lead guide 160 of the present invention is a pair of blocks 160a and 160b forming a spaced space D into which the lead 117 can enter.
  • the blocks 160a and 160b may have a substantially hexahedral shape, and as shown in more detail in FIG. 8, the edge portions of the blocks 160a and 160b facing the lid 117 may be chamfered and tapered. Since the spacing between the chamfered portions increases compared to the lower portions, the process margin may increase when positioning the lid 117.
  • the height of the upper surface of the lead guide 160 during lead positioning may be higher than that of the lead 117.
  • the width from the end to the end of the blocks 160a and 160b is larger than the width of the sealing grooves 141a and 142a.
  • the lead guide 160 may be moved up, down, left and right by separate driving means.
  • the blocks 160a and 160b may also move left and right with respect to each other so that the spaces D between the blocks 160a and 160b may be changed according to the lead size. After setting the separation space D according to the input lead condition, do not change the size of the separation space D while continuing the process, and reset the separation space D when the lead with different conditions is inserted. Allow this to proceed.
  • the blocks 160a and 160b may be made of a material having elasticity so that an impact is not applied to the lead 117 even when the lead 117 contacts the lead 117.
  • the blocks 160a and 160b are preferably insulating materials.
  • the separation space D may be designed to be spaced apart from the width of the lead 117 by 0.1 mm to 2.0 mm. That is, the distance d 'between the blocks 160a and 160b and the edge of the lead 117 may be 0.1 mm to 2.0 mm.
  • the upper and lower pouches constituting the pouch case are composed of the resin part of the inner layer and the metal foil of the outer layer (mostly aluminum foil) (the outermost layer covering the metal foil layer may include an additional resin part), and the sealing is a thermoplastic resin of the inner layer For example, it consists of heat-compressing polypropylene) resin part. To this end, it is necessary to heat and pressurize the pouch sealing part at a constant temperature and pressure.
  • the lead 117 is manufactured and provided with the sealant polymer film 118 positioned above and below. Sealing is achieved by placing sealing grooves 141a and 142a above and below the pouch edge and pressing the sealing portion up and down to apply a constant pressure and temperature.
  • the pressure applied to the sealing portion is preferably in the range of 0.1 to 5 MPa.
  • the pressure applied to the sealing portion may be provided with a pressure gauge on the sealing blocks 141 and 142 so that the same pressure is continuously applied while the sealing is performed. It is preferable to apply heat of 25-500 degreeC temperature range to a sealing part. If the temperature is less than 25 ° C, sealing may not occur properly, and heat energy sufficient to vaporize the electrolyte may not be transferred. If the temperature exceeds 500 ° C, the pouch itself may be damaged by heat, which is not preferable.
  • the lead guide 160 improves the accuracy of positioning the lead 117, the position of the lead 117 is always constant during the sealing process as shown in FIG. 9. Accordingly, in the enlarged cross-sectional view of FIG. 9, it is possible to confirm that the gap between the grooves 141a and 142a and the film 118 is almost eliminated because the position error during sealing can be reduced due to the installation of the lead guide 160. .
  • the lead guide 160 may determine the position of the lead 117 before the sealing blocks 141 and 142. Instead, the lead guide 160 may be applied simultaneously with the sealing blocks 141 and 142 to determine the position of the lid 117.
  • the lead guide 160 is formed of a pair of blocks 160a and 160b, and corner portions of the blocks 160a and 160b are chamfered and tapered. It is referred to as a true shape.
  • FIG. 10 is a cross-sectional view for showing various configurations of the lead guide that can be included in the sealing apparatus according to the present invention.
  • the tapered slopes in blocks 160a and 160b may be flat surfaces as shown in (a), convex up as in (b), or concave down as in (c).
  • Forms such as (a) are easy to process. As shown in (b), even if the lead comes into contact with the lead, it may give less physical impact to the lead. Forms such as (c) further increase the process margin during lead positioning.
  • FIG. 11 is a view for explaining various operation methods of the lead guide that may be included in the sealing apparatus according to the present invention.
  • FIG. 11A illustrates a case in which the blocks 160a and 160b of the lead guide 160 operate in the vertical direction, and (b) shows the blocks 160a and 160b of the lead guide 160 in the left and right directions.
  • the case of operation is shown.
  • the mode of operation is also possible with a combination of (a) and (b).
  • blocks 160a and 160b having the same distance as the separation space D are installed as shown in (a), and the separation space ( While maintaining D), the blocks 160a and 160b can be raised to the lead positioning position from the bottom of the sealing apparatus upward.
  • the blocks 160a and 160b are spaced farther apart from the spaced space D before the lead positioning, and the blocks 160a and 160b are spaced by a predetermined spaced space D during lead positioning. You can also adjust) to the left or right to match the separation space (D).
  • (C) of FIG. 11 is based on a pivoting method unlike the above-mentioned up, down, left, and right operating methods.
  • the blocks 160a and 160b are placed in a horizontal position, and when lead positioning is required, the blocks 160a and 160b are rotated about the axes provided in the respective blocks 160a and 160b, so that the blocks 160a and 160b are separated.
  • the interval may be as much as the space D.
  • the sealing guide of the pouch case around the lid may be greatly improved with respect to the secondary battery having a lead having a different thickness.
  • the lid and the pouch case can be more closely adhered to each other so that the sealing property of the battery can be improved, and at this time, the unsealed portion can be surely reduced.
  • the lead can always be constantly positioned in the sealing groove, the tolerance in the cross-sectional shape of the lead when designing the sealing groove does not have to be considered. That is, it is possible to form the width of the sealing groove almost equal to the width of the lead without leaving a clearance, and it is easy in the process for the lead to be correctly seated on the sealing groove. Since the lead is stably seated in the sealing groove and sealed, the sealing is always accurate and uniform and there is no fear of leakage of the electrolyte.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

Provided is a sealing apparatus of a pouch-type rechargeable battery, capable of preventing an electrolyte leakage phenomenon by continuously positioning a lid in a sealing groove so as to completely seal the pouch-type rechargeable battery. In a sealing apparatus of a pouch-type rechargeable battery for sealing a pouch case in which an electrode assembly is installed, the sealing apparatus according to the present invention comprises upper and lower portion sealing blocks, wherein at least one sealing block of the upper and lower portion sealing blocks has a sealing groove comprising a slant stepped portion which is formed in a position corresponding to a lid of the pouch-type rechargeable battery, and wherein a lid guide for mounting the lid on the sealing groove is installed in front of the sealing block.

Description

파우치형 이차전지의 실링 장치Sealing device for pouch type secondary battery

본 발명은 파우치형 이차전지의 제조를 위한 실링 장치에 관한 것으로, 보다 상세하게는 파우치 케이스와 리드와의 실링부가 개선된 파우치형 이차전지의 제조를 위한 실링 장치에 관한 것이다.The present invention relates to a sealing apparatus for manufacturing a pouch type secondary battery, and more particularly to a sealing apparatus for manufacturing a pouch type secondary battery with improved sealing portion of the pouch case and the lid.

본 출원은 2015년 4월 2일자 출원된 한국 특허출원 번호 제10-2015-0046932호 및 2016년 3월 15일자 출원된 한국 특허출원 번호제10-2016-0030974호에 대한 우선권주장출원으로서, 해당 출원의 명세서 및 도면에 개시된 모든 내용은 인용에 의해 본 출원에 원용된다.This application is a priority application for Korean Patent Application No. 10-2015-0046932, filed April 2, 2015 and Korean Patent Application No. 10-2016-0030974, filed March 15, 2016. All contents disclosed in the specification and drawings of the application are incorporated herein by reference.

충전 및 방전이 가능한 이차전지는 디지털 카메라, 셀룰라 폰, 노트북, 하이브리드 자동차 등 첨단 분야의 개발로 활발한 연구가 진행 중이다. 이차전지로는 니켈-카드뮴 전지, 니켈-메탈 하이드라이드 전지, 니켈-수소 전지, 리튬 이차전지를 들 수 있다. 이 중에서, 리튬 이차전지는 휴대용 전자기기의 전원으로 사용되거나, 또는 다수 개를 직렬 연결하여 고출력의 하이브리드 자동차에 사용되는데, 니켈-카드뮴 전지나, 니켈-메탈 하이드라이드 전지에 비하여 작동 전압이 3배가 높고, 단위 중량당 에너지 밀도의 특성도 우수하여 급속도로 사용되고 있는 추세이다.Secondary batteries that can be charged and discharged are being actively researched due to the development of high-tech fields such as digital cameras, cell phones, laptops and hybrid cars. Examples of secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-hydrogen batteries, and lithium secondary batteries. Among these, lithium secondary batteries are used as a power source for portable electronic devices, or are used in high-power hybrid vehicles by connecting a plurality of them in series, and the operating voltage is three times higher than that of nickel-cadmium batteries or nickel-metal hydride batteries. In addition, the energy density per unit weight is also excellent and is being used rapidly.

이와 같은 리튬 이차전지는 원통형(cylinder type), 각형(prismatic type) 등 다양한 형태로 제조 가능한데, 최근 들어 유연성을 지닌 파우치형(pouch type)으로 제조된 파우치형 이차전지가 각광받고 있다.Such a lithium secondary battery can be manufactured in various forms such as cylindrical type and prismatic type. Recently, a pouch type secondary battery manufactured in a pouch type having flexibility has been spotlighted.

도 1에는 일반적인 파우치형 이차전지(10) 및 파우치형 이차전지(10)를 실링하는 실링 장치(20)가 도시되어 있다.1 illustrates a general pouch type secondary battery 10 and a sealing device 20 for sealing the pouch type secondary battery 10.

도 1을 참조하면, 파우치형 이차전지(10)는 상부 파우치(15a)와 하부 파우치(15b)로 이루어진 파우치 케이스 및 리드(17)를 포함한다. 리드(17)는 파우치(15a, 15b)의 외측으로 돌출되도록 파우치(15a, 15b)에 내장되는 전극조립체(미도시)로부터 연장 형성된다. 그리고 파우치(15a, 15b)의 가장자리를 따라 파우치(15a, 15b)가 밀폐되도록 실링되는 실링부(15)가 형성된다.Referring to FIG. 1, the pouch type secondary battery 10 includes a pouch case and a lead 17 formed of an upper pouch 15a and a lower pouch 15b. The lid 17 extends from an electrode assembly (not shown) embedded in the pouches 15a and 15b so as to protrude outward from the pouches 15a and 15b. A sealing portion 15 is formed along the edges of the pouches 15a and 15b to seal the pouches 15a and 15b.

실링 장치(20)는 파우치 실링부(15)의 상부 및 하부에 승강 수단(30)에 의해 승강 가능하도록 설치되어 승강에 의해 실링부(15)를 가압한다. 이 때, 실링 장치(20)는 내장된 가열 수단(미도시)에 의해 열을 발생시켜 실링부(15)를 가열하게 된다. 즉, 실링 장치(20)가 실링부(15)를 가열 가압함에 의해 파우치(15a, 15b)의 고분자가 융착되면서 실링되는 것이다. The sealing device 20 is installed on the upper and lower portions of the pouch sealing portion 15 so as to be elevated by the elevating means 30 to press the sealing portion 15 by elevating. At this time, the sealing device 20 generates heat by the built-in heating means (not shown) to heat the sealing unit 15. That is, the sealing device 20 is sealed while the polymers of the pouches 15a and 15b are fused by heat-pressurizing the sealing unit 15.

여기에서 파우치(15a, 15b) 내부의 전해액이 리드(17)와 파우치(15a, 15b)의 접합 부위를 타고 누액(leakage)되는 것을 방지하기 위하여, 도 2와 같이 리드(17)에 얇은 수지층의 필름(18)을 코팅하여 실링 공정에 적용하고 있다. 도 2의 (a)는 리드의 상면도이고 (b)는 (a)의 B-B' 단면도이다. Here, in order to prevent the electrolyte solution inside the pouches 15a and 15b from leaking through the junction portions of the leads 17 and the pouches 15a and 15b, a thin resin layer is formed on the lid 17 as shown in FIG. 2. Film 18 is coated and applied to the sealing process. (A) is a top view of a lead, (b) is B-B 'sectional drawing of (a).

그러나 통상 50㎛ 내지 1000㎛의 두께를 갖는 리드(17)는 상기와 같이 필름(18)이 코팅되더라도 도 3에 도시된 바와 같이 상하부측의 파우치(15a, 15b)에 개재된 상태가 되므로 리드(17)의 양측면과 대응되는 부위의 파우치가 열 융착 실링 장치로는 완전히 접합되지 않게 되므로 전해액이 누설된다. 즉, 리드(17)는 상기한 소정의 두께를 가지고 있으므로 파우치(15a, 15b)가 접합된다 하여도 리드(17)의 두께에 의해 접합부위가 들뜨게 되는 것이다. 상기와 같이 리드(17) 주위의 상하부 케이스가 불완전하게 접합되면 리드 주위로 전해액이 누액되어 이차전지의 충방전에 따른 전기적 특성을 떨어뜨리는 문제가 야기된다. 이와 같은 문제점을 해결하기 위하여, 리드(17)를 사이에 두고 실링하는 개선된 실링 장치가 공지되었으며 이를 도 4에 도시하였다. However, the lead 17 having a thickness of 50 μm to 1000 μm is usually interposed in the pouches 15a and 15b of the upper and lower sides as shown in FIG. 3 even though the film 18 is coated as described above. Since the pouches at the portions corresponding to both sides of 17) are not completely bonded by the heat-sealing sealing apparatus, the electrolyte leaks. That is, since the lid 17 has the predetermined thickness mentioned above, even if the pouches 15a and 15b are joined, the joined portion is lifted by the thickness of the lid 17. As described above, when the upper and lower cases around the lead 17 are incompletely bonded, electrolyte is leaked around the lead, thereby causing a problem of lowering electrical characteristics due to charge and discharge of the secondary battery. In order to solve this problem, an improved sealing apparatus for sealing with the lid 17 in between is known and shown in FIG.

도 4를 참조하면, 실링 장치(40)는 가열 수단(도시되지 않음)이 마련된 상하부 가열 블록(41, 42)을 구비하고, 상하부 케이스(15a, 15b)에 개재되는 리드(17)와 대응되는 가열 블록(41, 42) 부분에는 실링시 리드(17)가 안착되는 실링 그루브(41a, 42a)를 형성한 것이다. 실링 그루브(41a, 42a)는 리드(17)가 안착되어 리드(17) 이외의 부분이 충분히 가압되어 실링되도록 구성된 것이다. 그리고 리드(17)는 그 두께만큼 실링 그루브(41a, 42a)에 의해 보상된 상태에서 실링된다. Referring to FIG. 4, the sealing device 40 includes upper and lower heating blocks 41 and 42 provided with heating means (not shown), and corresponds to the lid 17 interposed in the upper and lower cases 15a and 15b. The heating blocks 41 and 42 are formed with sealing grooves 41a and 42a in which the lid 17 is seated upon sealing. The sealing grooves 41a and 42a are configured such that the lid 17 is seated so that portions other than the lid 17 are sufficiently pressurized and sealed. And the lid 17 is sealed in the state compensated by the sealing grooves 41a and 42a by the thickness thereof.

그런데 현재 실링 공정상 리드(17)가 항상 일정하게 실링 그루브(41a, 42a)에 위치하는 것이 아니기 때문에 실링 그루브(41a, 42a)는 도 5와 같이 보통 리드(17) 단면 형상에서 공차를 고려한 여유(d)를 가지게 된다. 보통 실링 그루브(41a, 42a)는 폭 길이가 리드(17)의 폭 길이보다 10% 정도 더 넓게 형성된다. However, in the current sealing process, since the lead 17 is not always constantly positioned in the sealing grooves 41a and 42a, the sealing grooves 41a and 42a have a margin considering the tolerance in the cross-sectional shape of the lead 17 as shown in FIG. (d) Usually, the sealing grooves 41a and 42a have a width length of about 10% wider than the width length of the lid 17.

도 6의 점선 화살표로 표시한 바와 같이 리드(17)가 안착되는 위치가 일정하지 않아도 실링 공정은 진행될 수 있다. 그런데, 이러한 여유 공간 때문에 실링 그루브(41a, 42a)와 리드(17)의 폭 길이 차이 즉, 여유 공간만큼 실링 장치(40)에 의해 가압되지 않는 비실링 부위가 생기게 된다. 그리고, 리드(17)의 두께가 두꺼워짐에 따라 실링 그루브(41a, 42a)의 깊이와 폭 길이가 증가할수록 비실링 부위 또한 커지게 된다. 또한 실링 조건이나 리드 조건이 변할 때 도 6과 같이 실링 그루브(42a)와 필름(18)의 빈 공간, 갭(gap)을 메우지 못하여 완전 밀봉되지 않고 전해액이 누액되어 불량을 일으키는 요소로 작용하게 된다.As indicated by the dotted arrows in FIG. 6, the sealing process may proceed even if the position where the lid 17 is not fixed is constant. However, due to such a clearance, there is a non-sealing portion that is not pressurized by the sealing device 40 by the difference in the width lengths of the sealing grooves 41a and 42a and the lid 17, that is, the clearance. As the thickness of the lid 17 increases, the unsealed portion also increases as the depth and width of the sealing grooves 41a and 42a increase. In addition, when the sealing condition or the lead condition is changed, as shown in FIG. 6, the voids and gaps of the sealing groove 42a and the film 18 may not be filled, so that the electrolyte may be leaked without causing a complete sealing to act as a factor that causes defects. do.

본 발명이 해결하고자 하는 과제는, 리드가 항상 일정하게 실링 그루브에 위치할 수 있도록 해 완전 밀봉시킴으로써 전해액 누액 현상을 방지할 수 있는 파우치형 이차전지의 실링 장치를 제공하는 것이다.The problem to be solved by the present invention is to provide a sealing device of a pouch-type secondary battery that can prevent the leakage of the electrolyte solution by allowing the lead to always be constantly positioned in the sealing groove and completely sealed.

상기 과제를 해결하기 위하여, 본 발명에 따른 실링 장치는, 전극조립체가 내장된 파우치 케이스를 실링하는 파우치형 이차전지의 실링 장치에 있어서, 상기 실링 장치는 상하부 실링 블록을 포함하고, 상기 상하부 실링 블록 중 적어도 어느 한쪽 실링 블록은 파우치형 이차전지의 리드와 상응하는 위치에 사선형의 단차부를 포함하는 실링 그루브가 형성되어 있으며, 상기 실링 그루브에 상기 리드가 안착되도록 하는 리드 가이드가 상기 실링 블록 앞에 설치된 것을 특징으로 한다.In order to solve the above problems, the sealing device according to the present invention, in the sealing device of the pouch-type secondary battery for sealing the pouch case in which the electrode assembly is embedded, the sealing device comprises a top and bottom sealing block, the top and bottom sealing block At least one of the sealing blocks is formed with a sealing groove including a diagonal stepped portion at a position corresponding to the lead of the pouch-type secondary battery, the lead guide for mounting the lead in the sealing groove is installed in front of the sealing block It is characterized by.

상기 리드 가이드는 상기 리드가 들어갈 수 있는 이격 공간을 형성하는 한 쌍의 블록인 것이 바람직하다. 이 때, 상기 블록에서 상기 리드를 향한 모서리 부분이 모따기되어 테이퍼진 형상일 수 있다. 상기 이격 공간은 상기 리드의 폭에서 0.1mm 내지 2.0mm 범위만큼 떨어지도록 설계할 수 있다.The lead guide is preferably a pair of blocks that form a separation space into which the lead can enter. At this time, the edge portion toward the lead in the block may be chamfered and tapered. The separation space may be designed to be spaced apart from the width of the lead by 0.1mm to 2.0mm range.

실링 공정 진행시 상기 리드 가이드는 상기 실링 블록보다 먼저 상기 리드의 위치를 결정할 수 있다. 대신에 상기 리드 가이드는 상기 실링 블록과 동시에 적용되어 상기 리드의 위치를 결정할 수도 있다. During the sealing process, the lead guide may determine the position of the lead before the sealing block. Instead, the lead guide may be applied simultaneously with the sealing block to determine the position of the lead.

상기 블록은 대략 육면체 형상이며, 테이퍼진 사면은 평평한 면이거나 위로 볼록한 것이거나 아래로 오목한 것일 수 있다.The block is approximately hexahedral in shape, and the tapered slope may be flat, convex up or concave down.

상기 리드 가이드는 상기 리드의 위치를 결정하기 위해 상기 이격 공간을 유지한 채 상하 방향으로 작동되는 것일 수 있다.The lead guide may be operated in the vertical direction while maintaining the separation space to determine the position of the lead.

상기 리드 가이드는 상기 리드의 위치를 결정하기 위해 좌우 방향으로 작동해 상기 이격 공간을 맞추는 것일 수 있다.The lead guide may operate in the horizontal direction to determine the position of the lead so as to fit the separation space.

상기 리드 가이드는 상기 리드의 위치를 결정하기 위해 피봇 방식에 의해 작동해 상기 이격 공간을 맞추는 것일 수도 있다.The lead guide may be operated by pivoting to determine the position of the lead to fit the spacing space.

본 발명에 따르면, 리드 가이드를 설치함에 따라 실링 공정시 리드가 실링 그루브에 포지셔닝되는 정밀도가 현저히 높아진다. 이로 인하여, 실링 그루브와 필름 사이의 갭을 최소화할 수 있어, 파우치 실링부가 고르게 형성되며 완전 밀봉이 가능해진다. 따라서, 파우치 내부의 전해액이 외부로 누설되는 것을 방지할 수 있으며, 파우치형 이차전지의 실링성 및 신뢰성을 향상시킬 수 있다. According to the present invention, as the lead guide is installed, the accuracy in which the lead is positioned in the sealing groove during the sealing process is significantly increased. Due to this, the gap between the sealing groove and the film can be minimized, so that the pouch sealing portion is formed evenly and can be completely sealed. Therefore, the electrolyte inside the pouch can be prevented from leaking to the outside, and the sealing property and reliability of the pouch type secondary battery can be improved.

본 명세서에 첨부되는 다음의 도면들은 본 발명의 바람직한 실시예를 예시하는 것이며, 전술한 발명의 내용과 함께 본 발명의 기술사상을 더욱 이해시키는 역할을 하는 것이므로, 본 발명은 그러한 도면에 기재된 사항에만 한정되어 해석되어서는 아니된다.The following drawings, which are attached to this specification, illustrate preferred embodiments of the present invention, and together with the contents of the present invention serve to further understand the technical spirit of the present invention, the present invention is limited to the matters described in such drawings. It should not be construed as limited.

도 1은 일반적인 파우치형 이차전지 및 실링 장치를 도시한다.1 illustrates a general pouch type secondary battery and a sealing device.

도 2는 리드에 얇은 수지층의 필름이 코팅된 상태를 도시한다.2 shows a state in which a film of a thin resin layer is coated on a lead.

도 3은 종래 실링 장치로 실링한 경우의 리드 부분을 도시하는 단면도이다.3 is a cross-sectional view showing a lead portion when sealing with a conventional sealing device.

도 4는 실링 그루브가 마련된 종래의 다른 실링 장치를 도시한다. 4 shows another conventional sealing device provided with a sealing groove.

도 5 및 도 6은 종래 실링 장치에서 실링 그루브와 리드 필름 사이의 갭이 발생하는 문제를 설명하기 위한 도면들이다. 5 and 6 are views for explaining a problem that a gap occurs between the sealing groove and the lead film in the conventional sealing device.

도 7은 본 발명에 따른 실링 장치의 개략적인 사시도이다. 7 is a schematic perspective view of a sealing apparatus according to the present invention.

도 8은 도 7의 실링 장치에 리드가 안착되는 상태의 정면도이고, 도 9는 단면도이다.8 is a front view of a state in which a lead is seated on the sealing apparatus of FIG. 7, and FIG. 9 is a cross-sectional view.

도 10은 본 발명에 따른 실링 장치에 포함될 수 있는 리드 가이드의 다양한 구성을 보이기 위한 단면도이다.10 is a cross-sectional view for showing various configurations of the lead guide that can be included in the sealing apparatus according to the present invention.

도 11은 본 발명에 따른 실링 장치에 포함될 수 있는 리드 가이드의 다양한 작동 방식을 설명하기 위한 도면이다.11 is a view for explaining various operating methods of the lead guide that can be included in the sealing apparatus according to the present invention.

이하에서는 첨부된 도면들을 참조하여 본 발명의 바람직한 실시예에 대해 상세하게 설명한다. 그러나 본 발명은 이하에서 개시되는 실시예에 한정되는 것이 아니라 서로 다른 다양한 형태로 구현될 것이며, 단지 본 실시예는 본 발명의 개시가 완전하도록 하며, 통상의 지식을 가진 자에게 발명의 범주를 완전하게 알려주기 위해 제공되는 것이다. 도면에서의 요소의 형상 등은 보다 명확한 설명을 강조하기 위해서 과장되어진 것이고 동일한 참조번호는 동일한 구성요소를 가리킨다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you. Shapes of elements in the drawings and the like have been exaggerated for clarity and the same reference numbers refer to the same components.

도 7은 본 발명에 따른 실링 장치의 개략적인 사시도이다. 도 8은 도 7의 실링 장치에 리드가 안착되는 상태의 정면도이고, 도 9는 단면도이다.7 is a schematic perspective view of a sealing apparatus according to the present invention. 8 is a front view of a state in which a lead is seated on the sealing apparatus of FIG. 7, and FIG. 9 is a cross-sectional view.

먼저 도 7에 도시한 바와 같이, 본 발명에 따른 실링 장치(140)는 바형(bar-type)의 2개의 막대가 파우치의 상·하로 실링부를 열압착할 수 있도록 상하부 실링 블록(141, 142)을 포함한다. 상하부 실링 블록(141, 142)에는 파우치형 이차전지의 리드(117)와 상응하는 위치에 사선형의 단차부를 포함하는 실링 그루브(141a, 142a)가 형성되어 있다. 실링 그루브(141a, 142a)에 리드(117)가 안착되도록 하는 리드 가이드(160)가 실링 블록(141, 142) 앞에 설치되어 있다. First, as shown in FIG. 7, the sealing device 140 according to the present invention is the upper and lower sealing blocks (141, 142) so that two bars of the bar (bar-type) can be thermally compressed by the sealing portion up and down the pouch It includes. The upper and lower sealing blocks 141 and 142 are formed with sealing grooves 141a and 142a including diagonal stepped portions at positions corresponding to the leads 117 of the pouch type secondary battery. The lead guide 160 is installed in front of the sealing blocks 141 and 142 to allow the lid 117 to be seated in the sealing grooves 141a and 142a.

실링 블록(141, 142)은 승하강이 가능하도록 설치된다. 여기서, 승하강 수단은 일반적으로 널리 사용되는 실린더 등으로 마련될 수 있으며, 반드시 이에 한정되지는 않고, 실링 블록(141, 142)을 승하강 가능하도록 하는 모든 수단을 포함한다.The sealing blocks 141 and 142 are installed to be able to move up and down. Here, the elevating means may be provided by a cylinder or the like that is widely used, and is not necessarily limited thereto, and includes all means for raising and lowering the sealing blocks 141 and 142.

실링 장치(140)는 리드가 동일 방향으로 돌출된 리튬 이차전지, 즉 단방향 전지의 리드와 상응하는 위치에 실링 그루브(141a, 142a)가 형성되어 있는 것일 수 있다. 대신에, 실링 장치(140)는 리드가 서로 다른 방향으로 돌출된 리튬 이차전지, 즉 양방향 전지의 리드와 상응하는 위치에 실링 그루브(141a, 142a)가 형성되어 있는 것일 수도 있다. The sealing device 140 may be one in which the sealing grooves 141a and 142a are formed at positions corresponding to the leads of the lithium secondary battery, that is, the unidirectional battery, in which the leads protrude in the same direction. Instead, the sealing device 140 may be one in which the sealing grooves 141a and 142a are formed at positions corresponding to the leads of the lithium secondary battery, that is, the bidirectional battery, in which the leads protrude in different directions.

실링 그루브(141a, 142a)는 실링 블록(141, 142) 어느 한쪽에만 형성되어 있을 수도 있다. 이 때에 실링 그루브(141a, 142a)의 깊이는 리드 두께의 1/2 내지 리드의 두께와 동일한 깊이로 형성될 수 있다. 본 실시예에서와 같이 실링 그루브(141a, 142a)가 실링 블록(141, 142) 양쪽 모두에 형성된 경우에는 실링 그루브(141a, 142a) 각 깊이는 리드 두께의 1/2이 되는 깊이로 형성될 수 있다. The sealing grooves 141a and 142a may be formed only on either of the sealing blocks 141 and 142. In this case, the depths of the sealing grooves 141a and 142a may be formed to have a depth equal to 1/2 to a thickness of the lead. When the sealing grooves 141a and 142a are formed in both the sealing blocks 141 and 142 as in the present embodiment, each depth of the sealing grooves 141a and 142a may be formed to a depth that is 1/2 of the lead thickness. have.

실링 그루브(141a, 142a)는 도시한 바와 같이 사선형의 단차부를 갖는다. 사선형의 단차부는 2단 이상의 단차로 형성될 수 있다.The sealing grooves 141a and 142a have diagonal stepped portions as shown. The diagonal stepped portion may be formed in two or more steps.

이러한 실링 장치(140)는 파우치 케이스 안에 내장된 전극조립체로부터 연장 돌출되는 리드가 실링 그루브(141a, 142a)에 안착된 상태에서 실링이 이루어지도록 한다. The sealing device 140 allows the sealing to be made in a state in which a lead extending from the electrode assembly embedded in the pouch case is seated on the sealing grooves 141a and 142a.

이 때, 전극조립체는 하나 이상의 음극, 분리막, 양극을 차례로 적층하여 권취한 젤리 롤형 전극조립체; 음극, 분리막, 양극이 차례로 적층된 단위셀을 긴 필름형태의 분리막에 배치한 후 단일 방향으로 권취한 스택(stack) & 폴딩(folding)형 전극조립체; 음극, 분리막, 양극이 차례로 적층된 단위셀을 긴 필름형태의 분리막에 배치한 후 지그재그 방향으로 권취한 스택 & 폴딩형 전극조립체 중 어느 하나일 수 있다. At this time, the electrode assembly comprises a jelly roll-type electrode assembly wound by sequentially stacking one or more cathode, separator, anode; A stack & folding electrode assembly in which a unit cell in which a cathode, a separator, and an anode are sequentially stacked is disposed on a separator having a long film form and then wound in a single direction; The negative electrode, the separator, and the positive electrode may be any one of a stack & folding electrode assembly in which a unit cell in which a cathode is sequentially stacked is disposed in a long film type separator and wound in a zigzag direction.

도 7 및 도 8을 함께 참조하면, 본 발명의 특유한 리드 가이드(160)는 리드(117)가 들어갈 수 있는 이격 공간(D)을 형성하는 한 쌍의 블록(160a, 160b)이다. Referring to FIGS. 7 and 8 together, the unique lead guide 160 of the present invention is a pair of blocks 160a and 160b forming a spaced space D into which the lead 117 can enter.

이 때, 블록(160a, 160b)은 대략 육면체 형상이면서, 도 8에 더 자세히 나타낸 바와 같이, 블록(160a, 160b)에서 리드(117)를 향한 모서리 부분이 모따기되어 테이퍼진 형상일 수 있다. 모따기된 부분 사이의 간격은 아래부분에 비하여 늘어나므로 리드(117)를 포지셔닝할 때에 공정 여유도가 증가될 수 있다. In this case, the blocks 160a and 160b may have a substantially hexahedral shape, and as shown in more detail in FIG. 8, the edge portions of the blocks 160a and 160b facing the lid 117 may be chamfered and tapered. Since the spacing between the chamfered portions increases compared to the lower portions, the process margin may increase when positioning the lid 117.

도 9의 단면 확대도를 참조하면, 리드 포지셔닝시에 리드 가이드(160)의 상면 높이는 리드(117)보다 높게 구성할 수 있다. 블록(160a, 160b) 끝에서 끝까지의 폭은 실링 그루브(141a, 142a) 폭 길이보다 크게 하는 것이 안정적인 형상이다. 리드 가이드(160)는 별도의 구동 수단에 의하여 상하좌우로 이동할 수 있다. 블록(160a, 160b) 사이의 이격 공간(D)을 리드 크기에 맞춰 변경할 수 있도록 블록(160a, 160b)도 서로에 대해 좌우로 이동할 수 있다. 투입되는 리드 조건에 맞추어 이격 공간(D)을 설정한 후 계속 공정을 진행하는 동안에는 이격 공간(D)의 크기를 변경시키지 않고, 다른 조건의 리드가 투입될 때에는 이격 공간(D)을 재설정하여 공정이 진행될 수 있도록 한다. Referring to the enlarged cross-sectional view of FIG. 9, the height of the upper surface of the lead guide 160 during lead positioning may be higher than that of the lead 117. The width from the end to the end of the blocks 160a and 160b is larger than the width of the sealing grooves 141a and 142a. The lead guide 160 may be moved up, down, left and right by separate driving means. The blocks 160a and 160b may also move left and right with respect to each other so that the spaces D between the blocks 160a and 160b may be changed according to the lead size. After setting the separation space D according to the input lead condition, do not change the size of the separation space D while continuing the process, and reset the separation space D when the lead with different conditions is inserted. Allow this to proceed.

블록(160a, 160b)은 리드(117) 포지셔닝시 리드(117)와 닿아도 리드(117)에 충격이 가해지지 않도록 탄성을 가진 재질로 구성함이 바람직하다. 그리고 전기적인 문제가 생기지 않도록 블록(160a, 160b)은 절연성의 물질임이 바람직하다. 이격 공간(D)은 리드(117)의 폭에서 0.1mm 내지 2.0mm 범위만큼 떨어지도록 설계할 수 있다. 즉, 블록(160a, 160b)과 리드(117) 가장자리 사이의 거리(d')가 0.1mm 내지 2.0mm가 될 수 있다. The blocks 160a and 160b may be made of a material having elasticity so that an impact is not applied to the lead 117 even when the lead 117 contacts the lead 117. In order to prevent electrical problems, the blocks 160a and 160b are preferably insulating materials. The separation space D may be designed to be spaced apart from the width of the lead 117 by 0.1 mm to 2.0 mm. That is, the distance d 'between the blocks 160a and 160b and the edge of the lead 117 may be 0.1 mm to 2.0 mm.

파우치 케이스를 구성하는 상하부 파우치의 경우 내층의 레진부와 외층의 금속박(대부분 알루미늄 박)으로 구성되며(금속박층을 덮는 최외층에 추가적인 레진부를 포함할 수도 있음), 실링은 내층의 열가소성수지(예를 들면, 폴리프로필렌) 레진부를 가열 압착시키는 것으로 이루어진다. 이를 위해 파우치 실링부를 일정한 온도 및 압력으로 가온, 가압하는 것이 필요하다.The upper and lower pouches constituting the pouch case are composed of the resin part of the inner layer and the metal foil of the outer layer (mostly aluminum foil) (the outermost layer covering the metal foil layer may include an additional resin part), and the sealing is a thermoplastic resin of the inner layer For example, it consists of heat-compressing polypropylene) resin part. To this end, it is necessary to heat and pressurize the pouch sealing part at a constant temperature and pressure.

리드(117)는 위아래에 실런트인 고분자 필름(118)이 위치하는 상태로 제조되어 제공된다. 파우치 가장자리를 따라 위, 아래에 실링 그루브(141a, 142a)를 장치시키고 실링부를 위, 아래에서 눌러 일정 압력 및 온도를 가하는 것으로 실링이 이루어지게 된다. 실링부에 가해지는 압력은 0.1 ~ 5㎫의 범위가 적당하다. 또한, 실링부에 가해지는 압력은 실링 블록(141, 142)에 압력 게이지를 달아 실링이 이루어지는 동안 계속하여 동일한 압력이 걸리도록 할 수 있다. 실링부에는 25 ~ 500℃ 온도 범위의 열이 가해지는 것이 바람직하다. 25℃ 미만에서는 실링이 제대로 일어나지 않을 우려가 있을 뿐만 아니라, 전해액을 기화시키기에 충분한 열에너지를 전달하지 못할 수 있고, 500℃를 초과하면, 파우치 자체가 열에 의해 손상될 우려가 있어 바람직하지 않다. The lead 117 is manufactured and provided with the sealant polymer film 118 positioned above and below. Sealing is achieved by placing sealing grooves 141a and 142a above and below the pouch edge and pressing the sealing portion up and down to apply a constant pressure and temperature. The pressure applied to the sealing portion is preferably in the range of 0.1 to 5 MPa. In addition, the pressure applied to the sealing portion may be provided with a pressure gauge on the sealing blocks 141 and 142 so that the same pressure is continuously applied while the sealing is performed. It is preferable to apply heat of 25-500 degreeC temperature range to a sealing part. If the temperature is less than 25 ° C, sealing may not occur properly, and heat energy sufficient to vaporize the electrolyte may not be transferred. If the temperature exceeds 500 ° C, the pouch itself may be damaged by heat, which is not preferable.

리드 가이드(160)가 리드(117) 포지셔닝의 정밀도를 향상시키므로, 실링 공정시 도 9와 같이 리드(117)의 위치는 항상 일정해지게 된다. 이에 따라 도 9의 단면 확대도를 보면, 리드 가이드(160)의 설치로 인해 실링시 위치 오차를 줄일 수 있어 실링 그루브(141a, 142a)와 필름(118) 사이의 갭이 거의 없어짐을 확인할 수 있다.Since the lead guide 160 improves the accuracy of positioning the lead 117, the position of the lead 117 is always constant during the sealing process as shown in FIG. 9. Accordingly, in the enlarged cross-sectional view of FIG. 9, it is possible to confirm that the gap between the grooves 141a and 142a and the film 118 is almost eliminated because the position error during sealing can be reduced due to the installation of the lead guide 160. .

실링 공정 진행시 리드 가이드(160)는 실링 블록(141, 142)보다 먼저 리드(117)의 위치를 결정할 수 있다. 대신에 리드 가이드(160)는 실링 블록(141, 142)과 동시에 적용되어 리드(117)의 위치를 결정할 수도 있다. During the sealing process, the lead guide 160 may determine the position of the lead 117 before the sealing blocks 141 and 142. Instead, the lead guide 160 may be applied simultaneously with the sealing blocks 141 and 142 to determine the position of the lid 117.

한편, 도 7 내지 도 9를 참조하여 설명한 실링 장치(140)에서 리드 가이드(160)는 한 쌍의 블록(160a, 160b)으로 이루어지고, 이러한 블록(160a, 160b)의 모서리 부분이 모따기되어 테이퍼진 형상임을 언급하였다. Meanwhile, in the sealing apparatus 140 described with reference to FIGS. 7 to 9, the lead guide 160 is formed of a pair of blocks 160a and 160b, and corner portions of the blocks 160a and 160b are chamfered and tapered. It is referred to as a true shape.

도 10은 본 발명에 따른 실링 장치에 포함될 수 있는 리드 가이드의 다양한 구성을 보이기 위한 단면도이다.10 is a cross-sectional view for showing various configurations of the lead guide that can be included in the sealing apparatus according to the present invention.

도 10을 참조하면, 블록(160a, 160b)에서 테이퍼진 사면은 (a)와 같이 평평한 면이거나 (b)와 같이 위로 볼록하거나 (c)와 같이 아래로 오목할 수 있다. (a)와 같은 형태는 가공이 용이하다. (b)와 같은 형태는 리드 포지셔닝시 리드와 닿아도 리드에 물리적 충격을 덜 가할 수 있다. (c)와 같은 형태는 리드 포지셔닝시 공정 여유도가 더 증가된다. Referring to FIG. 10, the tapered slopes in blocks 160a and 160b may be flat surfaces as shown in (a), convex up as in (b), or concave down as in (c). Forms such as (a) are easy to process. As shown in (b), even if the lead comes into contact with the lead, it may give less physical impact to the lead. Forms such as (c) further increase the process margin during lead positioning.

앞의 설명에서 리드 가이드(160)의 블록(160a, 160b)은 상하좌우로 이동할 수 있고, 블록(160a, 160b) 서로에 대해 좌우로 이동할 수 있음을 언급하였다. 다음 도 11은 본 발명에 따른 실링 장치에 포함될 수 있는 리드 가이드의 다양한 작동 방식을 설명하기 위한 도면이다. In the foregoing description, it is mentioned that the blocks 160a and 160b of the lead guide 160 may move up, down, left, and right, and the blocks 160a, 160b may move left and right with respect to each other. Next, FIG. 11 is a view for explaining various operation methods of the lead guide that may be included in the sealing apparatus according to the present invention.

도 11의 (a)는 리드 가이드(160)의 블록(160a, 160b)이 상하 방향으로 작동되는 경우를 도시하고, (b)는 리드 가이드(160)의 블록(160a, 160b)이 좌우 방향으로 작동되는 경우를 도시한다. 작동 방식은 (a)와 (b)의 조합으로도 가능하다. FIG. 11A illustrates a case in which the blocks 160a and 160b of the lead guide 160 operate in the vertical direction, and (b) shows the blocks 160a and 160b of the lead guide 160 in the left and right directions. The case of operation is shown. The mode of operation is also possible with a combination of (a) and (b).

투입되는 리드 조건에 맞추어 이격 공간(D)을 설정한 후 계속 공정을 진행하는 경우라면, (a)와 같이 이격 공간(D) 만큼의 간격을 가지는 블록(160a, 160b)을 설치해 두고 이격 공간(D)을 유지한 채 실링 장치의 아래에서부터 상부 방향으로 블록(160a, 160b)이 리드 포지셔닝 위치로 올라오도록 할 수 있다.In the case where the process is continued after setting the separation space D according to the input lead condition, blocks 160a and 160b having the same distance as the separation space D are installed as shown in (a), and the separation space ( While maintaining D), the blocks 160a and 160b can be raised to the lead positioning position from the bottom of the sealing apparatus upward.

아니면, (b)와 같이 리드 포지셔닝 전에는 블록(160a, 160b)끼리 이격 공간(D)보다 멀리 이격되어 있도록 하다가 리드 포지셔닝시에 미리 설정된 이격 공간(D)만큼의 간격을 가지도록 블록(160a, 160b)을 좌우 방향으로 작동해 이격 공간(D)을 맞추게 할 수도 있다.Alternatively, as shown in (b), the blocks 160a and 160b are spaced farther apart from the spaced space D before the lead positioning, and the blocks 160a and 160b are spaced by a predetermined spaced space D during lead positioning. You can also adjust) to the left or right to match the separation space (D).

도 11의 (c)는 이러한 상하좌우 작동방식과는 달리 피봇 방식에 의한 것이다. (c)에서 보는 바와 같이, 평소에 블록(160a, 160b)은 수평 위치로 두었다가 리드 포지셔닝이 필요할 때 각 블록(160a, 160b)에 구비된 축을 중심으로 회전하게 해 블록(160a, 160b) 사이의 간격이 이격 공간(D)만큼 되도록 할 수도 있다.(C) of FIG. 11 is based on a pivoting method unlike the above-mentioned up, down, left, and right operating methods. As shown in (c), normally, the blocks 160a and 160b are placed in a horizontal position, and when lead positioning is required, the blocks 160a and 160b are rotated about the axes provided in the respective blocks 160a and 160b, so that the blocks 160a and 160b are separated. The interval may be as much as the space D.

이와 같이 본 발명은 리드 가이드(160)를 설치함으로써, 보다 다양한 두께의 리드를 갖는 이차전지에 대해 리드 주변의 파우치 케이스의 실링성을 크게 개선할 수 있다. 리드와 파우치 케이스가 보다 확실히 밀착되도록 하여 전지의 실링성을 높일 수 있고, 이 때, 비실링 부위를 확실히 줄일 수 있다. As described above, according to the present invention, the sealing guide of the pouch case around the lid may be greatly improved with respect to the secondary battery having a lead having a different thickness. The lid and the pouch case can be more closely adhered to each other so that the sealing property of the battery can be improved, and at this time, the unsealed portion can be surely reduced.

그리고, 리드가 항상 일정하게 실링 그루브에 위치할 수 있게 되므로, 실링 그루브 설계시 리드 단면 형상에서 공차를 고려하지 않아도 된다. 즉, 여유공간을 두지 않고 실링 그루브의 폭을 리드의 폭과 거의 동일하게 형성하는 것이 가능하며, 리드가 실링 그루브에 정확하게 안착시키는 것이 공정상 수월하다. 리드가 실링 그루브에 안정하게 안착되어 실링되므로 실링이 항상 정확하고 균일하게 이루어지게 되고 전해액이 누액될 염려가 없다. In addition, since the lead can always be constantly positioned in the sealing groove, the tolerance in the cross-sectional shape of the lead when designing the sealing groove does not have to be considered. That is, it is possible to form the width of the sealing groove almost equal to the width of the lead without leaving a clearance, and it is easy in the process for the lead to be correctly seated on the sealing groove. Since the lead is stably seated in the sealing groove and sealed, the sealing is always accurate and uniform and there is no fear of leakage of the electrolyte.

근래 수요가 급격히 증가하고 있는 고용량 고출력의 중대형용 이차전지의 경우, 포함되는 단위셀 및 용량의 크기에 따라 리드의 두께가 증가하고 있는 바, 이와 같이 리드의 크기가 증가할수록 종래 실링 장치에 의해 가압되지 않는 비실링 부위가 커지게 되어 실링이 원활하게 이루어지지 않은 문제점이 있으며 따라서 실링에 따른 신뢰성이 저하되는 문제점이 있으나, 본 발명에 따르면 리드 두께에 상관없이 포지셔닝이 정확하므로 실링 신뢰성이 담보된다. In the case of high capacity, high output, medium and large sized secondary batteries in which demand is rapidly increasing in recent years, the thickness of leads increases according to the size of unit cells and capacities included therein. Thus, as the size of leads increases, the pressure is applied by conventional sealing devices. There is a problem in that the non-sealing portion is not large, so that the sealing is not made smoothly, and thus there is a problem that the reliability is lowered according to the sealing, but according to the present invention, since the positioning is accurate, the sealing reliability is secured.

이상, 본 발명의 바람직한 실시예에 대해 도시하고 설명하였으나, 본 발명은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형 실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위 내에 있게 된다.As mentioned above, although the preferred embodiment of the present invention has been illustrated and described, the present invention is not limited to the specific preferred embodiment described above, and the present invention belongs to the present invention without departing from the gist of the present invention as claimed in the claims. Various modifications can be made by those skilled in the art, and such changes are within the scope of the claims.

Claims (18)

전극조립체가 내장된 파우치 케이스를 실링하는 파우치형 이차전지의 실링 장치에 있어서,In the sealing device of the pouch type secondary battery for sealing the pouch case in which the electrode assembly is embedded, 상기 실링 장치는 상하부 실링 블록을 포함하고, 상기 상하부 실링 블록 중 적어도 어느 한쪽 실링 블록은 파우치형 이차전지의 리드와 상응하는 위치에 사선형의 단차부를 포함하는 실링 그루브가 형성되어 있으며,The sealing apparatus includes a top and bottom sealing block, at least one of the top and bottom sealing block is formed with a sealing groove including a diagonal stepped portion at a position corresponding to the lead of the pouch-type secondary battery, 상기 실링 그루브에 상기 리드가 안착되도록 하는 리드 가이드가 상기 실링 블록 앞에 설치된 것을 특징으로 하는 실링 장치.And a lead guide installed in front of the sealing block to allow the lead to be seated in the sealing groove. 제1항에 있어서, 상기 리드 가이드는 상기 리드가 들어갈 수 있는 이격 공간을 형성하는 한 쌍의 블록인 것을 특징으로 하는 실링 장치.The sealing apparatus according to claim 1, wherein the lead guide is a pair of blocks forming a separation space into which the lead can enter. 제2항에 있어서, 상기 블록에서 상기 리드를 향한 모서리 부분이 모따기되어 테이퍼진 형상인 것을 특징으로 하는 실링 장치.The sealing device according to claim 2, wherein the edge portion of the block facing the lead is chamfered and tapered. 제2항에 있어서, 상기 이격 공간은 상기 리드의 폭에서 0.1mm 내지 2.0mm 범위만큼 떨어진 것을 특징으로 하는 실링 장치.The sealing apparatus of claim 2, wherein the separation space is separated by 0.1 mm to 2.0 mm from the width of the lead. 제2항에 있어서, 상기 리드 가이드는 상하좌우로 이동할 수 있는 것을 특징으로 하는 실링 장치. The sealing apparatus according to claim 2, wherein the lead guide is movable up, down, left and right. 제2항에 있어서, 상기 블록 끝에서 끝까지의 폭은 상기 실링 그루브 폭 길이보다 큰 것을 특징으로 하는 실링 장치. 3. The sealing device according to claim 2, wherein the width from the end of the block to the end is larger than the sealing groove width. 제2항에 있어서, 상기 블록은 서로에 대해 좌우로 이동할 수 있는 것을 특징으로 하는 실링 장치. The sealing device according to claim 2, wherein the blocks can move left and right with respect to each other. 제1항에 있어서, 상기 리드 가이드는 탄성을 가진 재질로 구성되어 있는 것을 특징으로 하는 실링 장치. The sealing device according to claim 1, wherein the lead guide is made of an elastic material. 제1항에 있어서, 상기 리드 가이드는 절연성의 물질인 것을 특징으로 하는 실링 장치. The sealing apparatus according to claim 1, wherein the lead guide is an insulating material. 제1항에 있어서, 상기 리드 가이드는 상기 실링 블록보다 먼저 상기 리드의 위치를 결정하는 것을 특징으로 하는 실링 장치.The sealing apparatus according to claim 1, wherein the lead guide determines the position of the lead before the sealing block. 제1항에 있어서, 상기 리드 가이드는 상기 실링 블록과 동시에 적용되어 상기 리드의 위치를 결정하는 것을 특징으로 하는 실링 장치.The sealing apparatus according to claim 1, wherein the lead guide is applied simultaneously with the sealing block to determine the position of the lead. 제1항에 있어서, 상기 리드의 위치를 결정할 때에 상기 리드 가이드의 상면 높이는 상기 리드보다 높게 위치하는 것을 특징으로 하는 실링 장치.The sealing device according to claim 1, wherein the height of the upper surface of the lead guide is higher than the lead when determining the position of the lead. 제3항에 있어서, 상기 테이퍼진 사면은 평평한 면인 것을 특징으로 하는 실링 장치.4. The sealing device according to claim 3, wherein the tapered slope is a flat surface. 제3항에 있어서, 상기 테이퍼진 사면은 위로 볼록한 것을 특징으로 하는 실링 장치.4. The sealing device according to claim 3, wherein the tapered slope is convex upward. 제3항에 있어서, 상기 테이퍼진 사면은 아래로 오목한 것을 특징으로 하는 실링 장치.4. The sealing device according to claim 3, wherein the tapered slope is concave down. 제2항에 있어서, 상기 리드 가이드는 상기 리드의 위치를 결정하기 위해 상기 이격 공간을 유지한 채 상하 방향으로 작동되는 것을 특징으로 하는 실링 장치.The sealing apparatus according to claim 2, wherein the lead guide is operated in an up and down direction while maintaining the separation space to determine the position of the lead. 제2항에 있어서, 상기 리드 가이드는 상기 리드의 위치를 결정하기 위해 좌우 방향으로 작동해 상기 이격 공간을 맞추는 것을 특징으로 하는 실링 장치.3. The sealing apparatus according to claim 2, wherein the lead guide operates in the horizontal direction to determine the position of the lead so as to fit the separation space. 제2항에 있어서, 상기 리드 가이드는 상기 리드의 위치를 결정하기 위해 피봇 방식에 의해 작동해 상기 이격 공간을 맞추는 것을 특징으로 하는 실링 장치.3. The sealing apparatus according to claim 2, wherein the lead guide is operated by a pivoting method to determine the position of the lead so as to fit the separation space.
PCT/KR2016/003121 2015-04-02 2016-03-28 Sealing apparatus of pouch-type rechargeable battery Ceased WO2016159607A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP16773388.0A EP3249732B1 (en) 2015-04-02 2016-03-28 Sealing apparatus of pouch-type rechargeable battery
JP2017547524A JP6549243B2 (en) 2015-04-02 2016-03-28 Sealing device for pouch type secondary battery
US15/556,170 US10547034B2 (en) 2015-04-02 2016-03-28 Sealing apparatus of pouch-type secondary battery
CN201680016695.XA CN107408720B (en) 2015-04-02 2016-03-28 Sealing device for pouch type secondary battery

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2015-0046932 2015-04-02
KR20150046932 2015-04-02
KR10-2016-0030974 2016-03-15
KR1020160030974A KR101852250B1 (en) 2015-04-02 2016-03-15 Sealing tool for a pouch type secondary battery

Publications (1)

Publication Number Publication Date
WO2016159607A1 true WO2016159607A1 (en) 2016-10-06

Family

ID=57006118

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2016/003121 Ceased WO2016159607A1 (en) 2015-04-02 2016-03-28 Sealing apparatus of pouch-type rechargeable battery

Country Status (1)

Country Link
WO (1) WO2016159607A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024545549A (en) * 2022-11-07 2024-12-10 エルジー エナジー ソリューション リミテッド Secondary battery sealing device
EP4539218A4 (en) * 2023-02-21 2025-09-03 Lg Energy Solution Ltd SEALANT BATTERY SEALING DEVICE

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100217393B1 (en) * 1996-11-30 1999-09-01 전주범 Lead correction apparatus of cathod for lithium battery
JP2005216623A (en) * 2004-01-28 2005-08-11 Sanyo Electric Co Ltd Laminated battery and manufacturing method thereof
KR20140044444A (en) * 2012-10-05 2014-04-15 에스케이이노베이션 주식회사 Guide zig for electrode tab and electrode tab assembling method thereof
KR20140086907A (en) * 2012-12-28 2014-07-08 주식회사 엘지화학 Apparatus and method for sealing pouch case of secondary battery
KR101452021B1 (en) * 2010-10-14 2014-10-23 주식회사 엘지화학 Sealing apparatus of pouched secondary battery

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100217393B1 (en) * 1996-11-30 1999-09-01 전주범 Lead correction apparatus of cathod for lithium battery
JP2005216623A (en) * 2004-01-28 2005-08-11 Sanyo Electric Co Ltd Laminated battery and manufacturing method thereof
KR101452021B1 (en) * 2010-10-14 2014-10-23 주식회사 엘지화학 Sealing apparatus of pouched secondary battery
KR20140044444A (en) * 2012-10-05 2014-04-15 에스케이이노베이션 주식회사 Guide zig for electrode tab and electrode tab assembling method thereof
KR20140086907A (en) * 2012-12-28 2014-07-08 주식회사 엘지화학 Apparatus and method for sealing pouch case of secondary battery

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024545549A (en) * 2022-11-07 2024-12-10 エルジー エナジー ソリューション リミテッド Secondary battery sealing device
EP4397469A4 (en) * 2022-11-07 2025-01-29 Lg Energy Solution, Ltd. SEALANT DEVICE FOR SECONDARY BATTERY
JP7782775B2 (en) 2022-11-07 2025-12-09 エルジー エナジー ソリューション リミテッド Secondary battery sealing device
EP4539218A4 (en) * 2023-02-21 2025-09-03 Lg Energy Solution Ltd SEALANT BATTERY SEALING DEVICE

Similar Documents

Publication Publication Date Title
EP3249732B1 (en) Sealing apparatus of pouch-type rechargeable battery
WO2015030373A1 (en) Sealing tool for pouch-type secondary battery
WO2019107814A1 (en) Pouch forming method and apparatus
WO2020159071A1 (en) Secondary battery
WO2019098522A1 (en) Pouch-type secondary battery having unsealed portion
WO2018131788A2 (en) Pouch-type secondary battery and pouch film forming apparatus
WO2019078447A1 (en) Pouch-type secondary battery sealing block for preventing cracks, pouch-type battery case manufactured by using same, and sealing method for pouch-type battery case
WO2019045329A1 (en) Pouch-type battery side part sealing method including two-step sealing process
WO2019132290A1 (en) Battery module having improved cooling structure
WO2014168397A1 (en) Battery cell having rounded corner
WO2014133275A1 (en) Secondary battery and manufacturing method therefor
WO2019054642A1 (en) Pouch-type secondary battery, and pouch film forming device
KR20180128573A (en) Method for manufacturing all solid state battery
WO2019017637A1 (en) Secondary battery pouch sheath material, pouch-type secondary battery employing same, and method for manufacturing same
WO2012177083A2 (en) Pouch and pouch type secondary battery
WO2014133303A1 (en) Stability-improved bi-cell for secondary battery and method for manufacturing same
WO2015034172A1 (en) Rectangular battery cell including battery case comprising two or more members
WO2017039181A1 (en) Cartridge for secondary battery
WO2018048133A1 (en) Secondary battery pouch exterior material, pouch type secondary battery using same, and manufacturing method therefor
WO2018056630A1 (en) Secondary battery
WO2023211220A1 (en) Pressurization device for secondary battery
WO2015037813A2 (en) Pouch type case, battery cell, and method for manufacturing battery cell
WO2021256804A1 (en) Secondary battery and method for manufacturing same
WO2016159607A1 (en) Sealing apparatus of pouch-type rechargeable battery
WO2016204467A1 (en) Lithium ion secondary battery

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16773388

Country of ref document: EP

Kind code of ref document: A1

REEP Request for entry into the european phase

Ref document number: 2016773388

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 15556170

Country of ref document: US

ENP Entry into the national phase

Ref document number: 2017547524

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE