WO2016159607A1 - Appareil d'étanchéité de batterie rechargeable de type pochette - Google Patents

Appareil d'étanchéité de batterie rechargeable de type pochette Download PDF

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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
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WO
WIPO (PCT)
Prior art keywords
sealing
lead
pouch
blocks
guide
Prior art date
Application number
PCT/KR2016/003121
Other languages
English (en)
Korean (ko)
Inventor
임성윤
김지현
Original Assignee
주식회사 엘지화학
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/ko
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to JP2017547524A priority Critical patent/JP6549243B2/ja
Priority to EP16773388.0A priority patent/EP3249732B1/fr
Priority to US15/556,170 priority patent/US10547034B2/en
Priority to CN201680016695.XA priority patent/CN107408720B/zh
Publication of WO2016159607A1 publication Critical patent/WO2016159607A1/fr

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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
    • H01M50/102—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.

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  • 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

L'invention concerne un appareil d'étanchéité d'une batterie rechargeable de type pochette, permettant d'empêcher un phénomène de fuite d'électrolyte par positionnement en continu d'un couvercle dans une rainure d'étanchéité de sorte à rendre complètement étanche la batterie rechargeable de type pochette. Dans un appareil d'étanchéité d'une batterie rechargeable de type pochette permettant de rendre étanche un boîtier en pochette dans lequel est installé un ensemble électrode, l'appareil d'étanchéité selon la présente invention comprend des blocs d'étanchéité de parties supérieure et inférieure, au moins un bloc d'étanchéité parmi les blocs d'étanchéité de parties supérieure et inférieure comportant une rainure d'étanchéité comprenant une partie étagée inclinée qui est formée dans une position correspondant à un couvercle de la batterie rechargeable de type pochette, et un guide de couvercle permettant le montage du couvercle sur la rainure d'étanchéité étant installé à l'avant du bloc d'étanchéité.
PCT/KR2016/003121 2015-04-02 2016-03-28 Appareil d'étanchéité de batterie rechargeable de type pochette WO2016159607A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2017547524A JP6549243B2 (ja) 2015-04-02 2016-03-28 パウチ型二次電池の封止装置
EP16773388.0A EP3249732B1 (fr) 2015-04-02 2016-03-28 Appareil d'étanchéité de batterie rechargeable de type pochette
US15/556,170 US10547034B2 (en) 2015-04-02 2016-03-28 Sealing apparatus of pouch-type secondary battery
CN201680016695.XA CN107408720B (zh) 2015-04-02 2016-03-28 袋型二次电池的密封装置

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 (ko) 2015-04-02 2016-03-15 파우치형 이차전지의 실링 장치

Publications (1)

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

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100217393B1 (ko) * 1996-11-30 1999-09-01 전주범 리튬전지용 캐소트의 리드교정장치
JP2005216623A (ja) * 2004-01-28 2005-08-11 Sanyo Electric Co Ltd ラミネート電池及びその製造方法
KR20140044444A (ko) * 2012-10-05 2014-04-15 에스케이이노베이션 주식회사 전극 탭용 가이드 지그 및 이의 전극 탭 결합 방법
KR20140086907A (ko) * 2012-12-28 2014-07-08 주식회사 엘지화학 이차 전지의 파우치 케이스 실링 장치 및 실링 방법
KR101452021B1 (ko) * 2010-10-14 2014-10-23 주식회사 엘지화학 파우치형 이차 전지의 실링장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100217393B1 (ko) * 1996-11-30 1999-09-01 전주범 리튬전지용 캐소트의 리드교정장치
JP2005216623A (ja) * 2004-01-28 2005-08-11 Sanyo Electric Co Ltd ラミネート電池及びその製造方法
KR101452021B1 (ko) * 2010-10-14 2014-10-23 주식회사 엘지화학 파우치형 이차 전지의 실링장치
KR20140044444A (ko) * 2012-10-05 2014-04-15 에스케이이노베이션 주식회사 전극 탭용 가이드 지그 및 이의 전극 탭 결합 방법
KR20140086907A (ko) * 2012-12-28 2014-07-08 주식회사 엘지화학 이차 전지의 파우치 케이스 실링 장치 및 실링 방법

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