WO2021015589A1 - 이차전지 실링공정용 히터 - Google Patents

이차전지 실링공정용 히터 Download PDF

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Publication number
WO2021015589A1
WO2021015589A1 PCT/KR2020/009789 KR2020009789W WO2021015589A1 WO 2021015589 A1 WO2021015589 A1 WO 2021015589A1 KR 2020009789 W KR2020009789 W KR 2020009789W WO 2021015589 A1 WO2021015589 A1 WO 2021015589A1
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WO
WIPO (PCT)
Prior art keywords
sub
heater
secondary battery
heating
sealing bar
Prior art date
Application number
PCT/KR2020/009789
Other languages
English (en)
French (fr)
Inventor
정종홍
김상진
Original Assignee
정종홍
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
Application filed by 정종홍 filed Critical 정종홍
Priority to EP20843303.7A priority Critical patent/EP3904059A4/en
Priority to CN202080011849.2A priority patent/CN113396641A/zh
Priority to US17/426,738 priority patent/US11987009B2/en
Publication of WO2021015589A1 publication Critical patent/WO2021015589A1/ko

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • 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
    • B29C65/022—Particular heating or welding methods not otherwise provided for
    • 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
    • B29C65/02—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
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • 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
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • 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
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/305—Electrical means involving the use of cartridge heaters
    • 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
    • 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
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81461—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps being multi-lamellar or segmented, i.e. comprising a plurality of strips, plates or stacked elements
    • 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
    • B29C66/818—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8182—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects
    • B29C66/81821—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects of the welding jaws
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • 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
    • 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
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • 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
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
    • B29C66/91212—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods involving measurement means being part of the welding jaws, e.g. integrated in the welding jaws
    • 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
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91231—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the joining tool
    • 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
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • 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
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining 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
    • 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
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91651—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
    • B29C66/91655—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the current intensity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
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    • H—ELECTRICITY
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    • H—ELECTRICITY
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
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    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • 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
    • B29C66/818—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8185—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—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
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools
    • B29C66/91423—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools using joining tools having different temperature zones or using several joining tools with different temperatures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3468—Batteries, accumulators or fuel cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7146—Battery-cases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention (Disclosure) relates to a heater for a secondary battery sealing process, and more particularly, to a structure of a heater capable of preventing the occurrence of sealing defects due to heating unevenness in the sealing process of a secondary battery pouch foil.
  • a typical pouch-type secondary battery cell has a structure in which an electrode assembly including a positive electrode, a negative electrode plate, and a separator is stacked and accommodated in a pouch foil together with an electrolyte.
  • the pouch foil is a sealing structure in which a sealing part is formed at the end of which the end is sealed by heat fusion.
  • the pouch foil formed with a sealing part and sealed from the outside protects the electrode assembly accommodated therein from external physical impact. It also prevents the electrolyte contained inside from chemically reacting with the external environment or leaking to the outside. In addition, the pouch foil itself is prevented from being damaged by preventing chemical modification of the exposed end of the pouch foil.
  • the sealing portion of the pouch foil must have uniform sealing characteristics in the longitudinal direction.
  • 1 is a heater structure employed in a conventional pouch-type secondary battery sealing process.
  • a heater heat wire, p11
  • the heater block (p10) and the heater block (p10) that are sealed by pressing the pouch foil (1) are raised and lowered, and the force of pressing the pouch foil (1) is applied.
  • It includes a provided cylinder (p20), an insulating layer (isolator, p30) that is inserted between the cylinder (p20) and the heater block (p10) to prevent heat transfer from the heater block (p10) to the cylinder (p20).
  • the heater structure employed in the conventional pouch-type secondary battery sealing process according to FIG. 1 is a structure in which the cylinder p20 is positioned at the center of the heater block p10 to apply force to the heater block p10.
  • the force of the heater block p10 pressing the pouch foil 1 is not uniform. Therefore, the amount of heat transferred from the heater block p10 to the pouch foil 1 is not uniform.
  • the heater p11 is disposed to be inserted long in the longitudinal direction of the heater block p10 at one side of the heater block p10. In this case, as the distance from the side to which the current is supplied to the heater p11 increases, the resistance increases and the amount of heat generated increases.
  • temperature unevenness occurs due to a partial air contact loss of the heater block p10 in which the heater p11 is embedded.
  • heat dissipation occurs continuously on the surface of the heater block p10 in the area A.
  • the heat dissipation phenomenon in the region A is one of the factors difficult to ensure the uniformity of the temperature in the length direction of the heater block p10.
  • An object of the present invention is to provide a heater for a secondary battery sealing process having a structure capable of preventing the occurrence of sealing defects due to heating unevenness in the sealing process of a secondary battery pouch foil.
  • An object of the present invention is to provide a heater for a secondary battery sealing process capable of securing uniformity in heating temperature according to a tendency for a secondary battery to become larger (longer).
  • a heater for a secondary battery sealing process includes: a sealing bar for heating and pressing a pouch foil to be sealed; A plurality of sub-heating units built in the sealing bar in the longitudinal direction and provided to independently supply heat to a plurality of regions divided in the longitudinal direction of the sealing bar; A temperature sensing unit provided on the sealing bar and sensing a temperature according to a position of a surface in contact with the pouch foil; And a control unit for controlling heating temperatures of the plurality of sub heating units based on the temperature sensed by the temperature sensing unit.
  • a common is provided to supply heat to all areas covered by the plurality of sub-heating units, which are embedded in the longitudinal direction inside the sealing bar.
  • the sealing bar has a receiving groove in which the common heating unit is embedded, and the plurality of heat is supplied by the plurality of sub heating units.
  • the region of covers the entire length of the receiving groove.
  • the common heating unit and the plurality of sub-heating units each have a current controller that controls an input current amount, by the current controller. Controlled independently.
  • the common heating unit and the plurality of sub heating units are provided as hot wires.
  • the plurality of sub-heating units may include a central portion at both ends in the longitudinal direction of the sealing bar. It is arranged so that the gap increases while moving to.
  • the sealing bar moves from its center to both ends in the longitudinal direction, thereby reducing heat dissipation efficiency.
  • the sealing bar is divided into a plurality of areas and the temperature thereof is controlled by using a plurality of sub-heating units, uniform sealing quality can be achieved regardless of the sealing position of the pouch foil.
  • FIG. 1 is a view illustrating a heater for a conventional secondary battery sealing process.
  • FIG. 2 is a view for explaining a heater for a secondary battery sealing process according to the present invention.
  • FIG. 3 is a diagram illustrating a common heating unit.
  • FIG. 4 is a diagram for explaining an operation relationship between a common heating unit and a sub heating unit.
  • FIG. 5 is a diagram for explaining a control structure of a common heating unit and a sub heating unit.
  • Fig. 6 is a diagram explaining an arrangement structure of a sub heating unit.
  • FIG. 2 is a diagram illustrating a heater for a secondary battery sealing process according to the present invention.
  • a heater for a secondary battery sealing process includes a sealing bar 10, a plurality of sub-heating units 20, a temperature sensing unit 30, and a control unit 40.
  • the sealing bar 10 heats and presses the pouch foil to be sealed.
  • the plurality of sub-heating units 20 are installed in the longitudinal direction inside the sealing bar 10, and are provided to independently supply heat to the plurality of regions 11 divided in the longitudinal direction of the sealing bar 10. do.
  • the temperature sensing unit 30 is provided on the sealing bar 10 and senses a temperature according to a position of a surface in contact with the pouch foil.
  • the control unit 40 controls heating temperatures of the plurality of sub-heating units 20 based on the temperature sensed by the temperature sensing unit 30.
  • the heater for a secondary battery sealing process according to the present invention is divided into a plurality of regions 11 to control the temperature of the sealing bar 10, so that a uniform sealing quality can be achieved regardless of the sealing position of the pouch foil.
  • FIG. 3 is a diagram illustrating a common heating unit
  • FIG. 4 is a diagram illustrating an operation relationship between the common heating unit and the sub heating unit.
  • the heater for sealing a secondary battery according to the present embodiment is embedded in the sealing bar 10 in the longitudinal direction, and supplies heat to the entire area covered by the plurality of sub-heating units 20. It has a common heating unit 50 provided to be.
  • the sealing bar 10 has a receiving groove 51 in which a common heating unit 50 is embedded, and a plurality of sub heating units ( The plurality of regions 11 to which heat is supplied by 20) covers the entire length of the receiving groove 51.
  • the common heating unit 50 supplies heat to the plurality of regions 11 at the same time, so that temperature control by the plurality of sub heating units 20 becomes more precise.
  • the plurality of sub-heating units 20 can precisely control the temperature by the heat supplied by the common heating unit 50.
  • the horizontal axis represents the position in the horizontal direction of FIG. 3.
  • the heat supplied through the common heating unit 50 increases the temperature of the entire sealing bar 10 by supplying a specific amount of heat to each of the plurality of regions 11.
  • the temperature difference dT between the temperature line T2 and the sealing temperature line T1 heated by the common heating unit 50 is reduced.
  • the sealing temperature line T1 represents a temperature according to the position of the sealing bar 10 required to seal the pouch foil.
  • the common heating part 50 operates to heat the sealing bar 20 to the temperature line T2
  • the plurality of sub-heating parts 20 are divided into a plurality of regions ( 11) Just heat each.
  • the plurality of sub-heating units 20 can precisely control the temperatures of the plurality of regions 11.
  • the time required for temperature control is short, and temperature displacement over time can be minimized.
  • the plurality of sub-heating parts 20 must control the plurality of regions 11 to the sealing temperature value.
  • the plurality of sub heating units 20 can control the temperature of the plurality of regions 11 in a narrow temperature range.
  • the temperature difference dT may vary depending on the location. This means that the heat transferred by the common heating unit 50 is not constant in the longitudinal direction of the sealing bar 10.
  • FIG. 5 is a diagram illustrating a control structure of a common heating unit and a sub heating unit.
  • each of the common heating unit 50 and the plurality of sub heating units 20 has a current controller 21 for controlling the amount of input current, and the current controller 21 Independently controlled by
  • the plurality of sub heating units 20 may preferably further include each power supply 22.
  • a heating device using electric power is heated in proportion to the current applied to the heating device.
  • each temperature can be made independently.
  • the limit of the power consumption of the power supply is not shared.
  • the common heating unit 50 and the plurality of sub heating units 20 are provided with a hot wire.
  • FIG. 6 is a diagram illustrating an arrangement structure of a sub heating unit.
  • the plurality of sub-heating units 20 are arranged so that the distance dL increases while moving from both ends of the sealing bar 10 to the center. do.
  • the volume of each of the plurality of regions 11 may also gradually increase as it moves from both ends of the sealing bar 10 to the center.
  • the temperature of each region may be further increased by heat transferred to each other.
  • the plurality of sub-heating units 20 are sufficiently spaced apart from each other, the plurality of regions 11 corresponding only to temperatures obtained by heating of the plurality of sub-heating units 20 themselves are heated.
  • the cylinder and the heat insulating layer are disposed in the central portion of the sealing bar 10, so that the area in which the surface of the sealing bar 10 is exposed to air is narrow.
  • the heat loss per unit time at both ends of the sealing bar 10 is greater than the heat loss per unit time at the center of the sealing bar 10.
  • the sealing bar may be designed to decrease heat dissipation efficiency while moving from the central portion to both ends in the longitudinal direction.
  • the sealing bar may preferably be designed such that the perimeter of the cross section in the vertical direction in the longitudinal direction decreases while moving from the central portion to both ends in the longitudinal direction.
  • the heat dissipation efficiency may be lowered.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Automation & Control Theory (AREA)
  • Fluid Mechanics (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Package Closures (AREA)
  • Secondary Cells (AREA)

Abstract

개시되는 이차전지 실링공정용 히터는, 실링 대상이 되는 파우치 포일을 가열 가압하는 실링 바; 상기 실링 바의 내측에 길이방향으로 내장되며, 상기 실링 바의 길이방향으로 구분된 복수의 영역에 각각 독립적으로 열을 공급하도록 구비되는 복수의 서브 가열부; 상기 실링 바에 구비되며, 상기 파우치 포일과 접촉되는 면의 위치에 따른 온도를 감지하는 온도감지부; 및 상기 온도감지부에 의해 감지된 온도를 기준으로 상기 복수의 서브 가열부의 가열온도를 제어하는 제어부;를 포함한다.

Description

이차전지 실링공정용 히터
본 발명(Disclosure)은, 이차전지 실링공정용 히터에 관한 것으로서, 구체적으로 이차전지 파우치 포일의 실링공정에서 가열 불 균일로 인한 실링 불량 발생을 방지할 수 있는 히터의 구조에 관한 것이다.
여기서는, 본 발명에 관한 배경기술이 제공되며, 이들이 반드시 공지기술을 의미하는 것은 아니다(This section provides background information related to the present disclosure which is not necessarily prior art).
일반적인 파우치형 이차전지셀은, 양극과 음극판 및 분리막을 포함하는 전극 조립체가 적층되어, 전해액과 함께 파우치 포일(foil)에 수용된 구조이다. 파우치 포일은 끝단이 열융착으로 밀봉되는 실링부가 형성된 봉지구조이다.
실링부가 형성되어 외부로 부터 밀폐된 파우치 포일은, 내부에 수용되는 전극 조립체를 외부의 물리적 충격으로부터 보호한다. 또한 내부에 수용되는 전해액이 외부 환경과 화학적으로 반응하거나 외부로 누출되는 것을 방지한다. 뿐만 아니라, 노출된 파우치 포일 끝단면의 화학적 변성을 방지함으로써 파우치 포일 자체의 파손을 방지한다.
따라서 파우치형 이차전지에서 파우치 포일의 실링부는, 그 길이 방향으로 균일한 밀봉 특성을 가져야 한다.
도 1은 종래의 파우치형 이차전지 실링공정에 채용되는 히터 구조이다.
도 1을 참조하면, 히터(열선, p11)가 중앙에 내장되며, 파우치 포일(1)을 눌러 밀봉시키는 히터블럭(p10), 히터블럭(p10)을 승강시키며 파우치 포일(1)을 누르는 힘을 제공하는 실린더(p20), 실린더(p20)와 히터블럭(p10) 사이에 삽입되어 히터블럭(p10)으로부터 실린더(p20)로 열전달을 방지하는 단열층(isolator, p30)을 포함한다.
도 1에 따른 종래의 파우치형 이차전지 실링공정에 채용되는 히터 구조는, 실린더(p20)를 히터블럭(p10)의 중앙부에 위치시켜 히터블럭(p10)에 힘을 가하는 구조이다.
상술한 바와 같은 히터 구조에서는, 히터블럭(p10)이 파우치 포일(1)을 누르는 힘이 균일하지 않다. 따라서 히터블럭(p10)로 부터 파우치 포일(1)로 전달되는 열전달량이 균일하지 않다.
또한. 실링을 위해 히터블럭(P10)을 누르는 가압력이, 히터블럭의 길이 방향으로 위치에 따라 균일하지 않아 단열층과 히터블럭(P10)의 접촉에 따라 열전도 손실이 발생됨.
또한, 히터(p11)는 히터블럭(p10)의 일측에서 히터블럭(p10)의 길이방향으로 길게 삽입되어 배치된다. 이때, 전류가 공급되는 일측으로부터 히터(p11)까지의 거리가 멀어질수록 저항이 증가하여 발열량이 증가한다.
즉, 히터(p11)의 길이 방향으로 히터(p11) 자체의 온도 균일성도 확보하기 어려운 문제점이 있다.
또한 히터(p11)가 내장되는 히터블럭(p10)의 부분적인 공기 접촉손실로 인한 온도 불균일도 발생한다.
도 1에 도시된 A 영역은, 히터블럭(p10) 표면의 대부분이 공기중에 노출된 상태이다. 반면에, 히터블럭(p10)의 중앙부는 단열층(p30)과 실린더(p20)에 의해 공기와의 접촉이 차단된다.
따라서 A 영역의 히터블럭(p10)의 표면에서는 지속적으로 방열(heat dissipation) 현상이 나타난다. 이러한 A 영역에서의 방열 현상은, 히터블럭(p10)의 길이 방향 온도 균일성을 확보하기 어려운 요인중에 하나이다.
본 발명(Disclosure)은, 이차전지 파우치 포일의 실링공정에서 가열 불 균일로 인한 실링 불량 발생을 방지할 수 있는 구조를 가지는 이차전지 실링공정용 히터의 제공을 일 목적으로 한다.
본 발명(Disclosure)은, 이차전지의 길이가 대형화(길어짐) 경향에 따라 가열온도 균일성 확보가 가능한 이차전지 실링공정용 히터의 제공을 일 목적으로 한다.
여기서는, 본 발명의 전체적인 요약(Summary)이 제공되며, 이것이 본 발명의 외연을 제한하는 것으로 이해되어서는 아니 된다(This section provides a general summary of the disclosure and is not a comprehensive disclosure of its full scope or all of its features).
상기한 과제의 해결을 위해, 본 발명을 기술하는 여러 관점들 중 어느 일 관점(aspect)에 따른 이차전지 실링공정용 히터는, 실링 대상이 되는 파우치 포일을 가열 가압하는 실링 바; 상기 실링 바의 내측에 길이방향으로 내장되며, 상기 실링 바의 길이방향으로 구분된 복수의 영역에 각각 독립적으로 열을 공급하도록 구비되는 복수의 서브 가열부; 상기 실링 바에 구비되며, 상기 파우치 포일과 접촉되는 면의 위치에 따른 온도를 감지하는 온도감지부; 및 상기 온도감지부에 의해 감지된 온도를 기준으로 상기 복수의 서브 가열부의 가열온도를 제어하는 제어부;를 포함한다.
본 발명의 일 관점(aspect)에 따른 이차전지 실링공정용 히터에서, 상기 실링 바의 내측에 길이방향으로 내장되며, 상기 복수의 서브 가열부에 의해 커버되는 전 영역에 열을 공급하도록 구비되는 공통 가열부;를 가진다.
본 발명의 다른 일 관점(aspect)에 따른 이차전지 실링공정용 히터에서, 상기 실링 바는, 상기 공통 가열부가 내장되는 수용홈;을 가지며, 상기 복수의 서브 가열부에 의해 열이 공급되는 상기 복수의 영역은, 상기 수용홈의 전체 길이를 커버한다.
본 발명의 또 다른 일 관점(aspect)에 따른 이차전지 실링공정용 히터에서, 상기 공통 가열부와 상기 복수의 서브 가열부는, 각각은 입력되는 전류량을 제어하는 전류컨트롤러를 가지며, 상기 전류컨트롤러에 의해 독립적으로 제어된다.
본 발명의 또 일 관점(aspect)에 따른 이차전지 실링공정용 히터에서, 상기 공통 가열부와 상기 복수의 서브 가열부는, 열선으로 구비된다.
상기한 과제의 해결을 위해, 본 발명을 기술하는 여러 관점들 중 어느 일 관점(aspect)에 따른 이차전지 실링공정용 히터에서, 상기 복수의 서브 가열부는, 상기 실링 바의 길이 방향 양 끝단에서 중앙부로 이동하면서 간격이 넓어지도록 배치된다.
본 발명의 다른 일 관점(aspect)에 따른 이차전지 실링공정용 히터에서, 상기 실링 바는, 그 중앙부에서 길이 방향 양끝단으로 이동하면서 방열효율(heat dissipation efficiency)이 낮아진다.
본 발명에 따르면, 복수의 서브 가열부를 이용하여, 실링 바를 복수의 영역으로 나누어 그 온도를 제어하므로, 파우치 포일의 실링위치에 관계없이 균일한 실링 품질을 달성할 수 있다.
도 1은 종래 이차전지 실링공정용 히터를 설명하는 도면.
도 2는 본 발명에 따른 이차전지 실링공정용 히터를 설명하는 도면.
도 3은 공통 가열부를 설명하는 도면.
도 4는 공통 가열부와 서브 가열부의 작동 관계를 설명하는 도면.
도 5는 공통 가열부 및 서브 가열부의 제어 구조를 설명하는 도면.
도 6은 서브 가열부의 배치 구조를 설명하는 도면.
이하, 본 발명에 따른 이차전지 실링공정용 히터를 구현한 실시형태를 도면을 참조하여 자세히 설명한다.
다만, 본 발명의 본질적인(intrinsic) 기술적 사상은 이하에서 설명되는 실시형태에 의해 그 실시 가능 형태가 제한된다고 할 수는 없고, 본 발명의 본질적인(intrinsic) 기술적 사상에 기초하여 통상의 기술자에 의해 이하에서 설명되는 실시형태를 치환 또는 변경의 방법으로 용이하게 제안될 수 있는 범위를 포섭함을 밝힌다.
또한, 이하에서 사용되는 용어는 설명의 편의를 위하여 선택한 것이므로, 본 발명의 본질적인(intrinsic) 기술적 사상을 파악하는 데 있어서, 사전적 의미에 제한되지 않고 본 발명의 기술적 사상에 부합되는 의미로 적절히 해석되어야 할 것이다.
도 2는 본 발명에 따른 이차전지 실링공정용 히터를 설명하는 도면이다.
도 2를 참조하면, 본 실시형태에 따른 이차전지 실링공정용 히터는, 실링 바(10)와 복수의 서브 가열부(20)와 온도감지부(30) 및 제어부(40)를 포함한다.
실링 바(10)는, 실링 대상이 되는 파우치 포일을 가열 가압한다.
복수의 서브 가열부(20)는, 실링 바(10)의 내측에 길이방향으로 내장되며, 실링 바(10)의 길이방향으로 구분된 복수의 영역(11)에 각각 독립적으로 열을 공급하도록 구비된다.
온도감지부(30)는, 실링 바(10)에 구비되며, 파우치 포일과 접촉되는 면의 위치에 따른 온도를 감지한다.
제어부(40)는, 온도감지부(30)에 의해 감지된 온도를 기준으로 복수의 서브 가열부(20)의 가열온도를 제어한다.
본 발명에 따른 이차전지 실링공정용 히터는, 복수의 영역(11)으로 나누어 실링 바(10)의 온도를 제어하므로, 파우치 포일의 실링위치에 관계없이 균일한 실링 품질을 달성할 수 있게 된다.
도 3은 공통 가열부를 설명하는 도면이고, 도 4는 공통 가열부와 서브 가열부의 작동 관계를 설명하는 도면이다.
도 3을 참조하면, 본 실시형태에 따른 이차전지 실링용 히터는, 실링 바(10)의 내측에 길이방향으로 내장되며, 복수의 서브 가열부(20)에 의해 커버되는 전 영역에 열을 공급하도록 구비되는 공통 가열부(50)를 가진다.
또한 도 3을 참조하면, 본 실시형태에 따른 이차전지 실링공정용 히터에서, 실링 바(10)는, 공통 가열부(50)가 내장되는 수용홈(51)을 가지며, 복수의 서브 가열부(20)에 의해 열이 공급되는 복수의 영역(11)은, 수용홈(51)의 전체 길이를 커버한다.
공통 가열부(50)는 복수의 영역(11)에 동시에 열을 공급함으로써 복수의 서브 가열부(20)에 의한 온도 제어가 더 정밀해진다.
도 4를 참조하면, 공통 가열부(50)에 의해 공급되는 열에 의해 복수의 서브 가열부(20)가 정밀하게 온도를 제어할 수 있음을 확인할 수 있다.
도 4에서 가로축은 도 3의 가로 방향 위치를 나타낸다.
공통 가열부(50)를 통하여 공급되는 열은, 복수의 영역(11) 각각에 특정한 양의 열을 공급함으로써 실링 바(10) 전체의 온도를 상승시킨다.
공통 가열부(50)에 의해 가열된 온도선(T2)과 실링온도선(T1)의 온도차이(dT)가 감소한다.
여기서 실링온도선(T1)은, 파우치 포일을 실링하기 위해 요구되는 실링 바(10)의 위치에 따른 온도를 나타낸다.
도 4에 나타낸 바와 같이, 공통 가열부(50)가 작동하여 실링 바(20)를 온도선(T2)까지 가열하면, 복수의 서브 가열부(20)는 온도차이(dT) 만큼 복수의 영역(11) 각각을 가열하면된다.
온도차이(dT)는 실링온도선(T1)보다 좁은 온도 범위이므로, 복수의 서브 가열부(20)는 복수의 영역(11)의 온도를 정밀 제어할 수 있다.
또한, 좁은 온도 범위에서 복수의 영역(11)을 가열하므로, 온도 제어에 필요한 시간이 짧아, 시간에 따른 온도 변위를 최소화 할 수 있다.
만일, 공통 가열부(50)를 채용하지 않아 이에 의한 열 공급이 없으면, 복수의 서브 가열부(20)는, 복수의 영역(11)을 실링온도값까지 제어해야 한다.
즉, 넓은 온도 범위에서 정밀하게 제어해야 하므로, 장비가 커질 수 있으며 고가(高價)의 부품을 사용해야 하는 문제점이 있다.
그러나 도 3 내지 도 4에서 확인할 수 있듯이, 공통 가열부(50)를 채용하면, 복수의 서브 가열부(20)가, 좁은 온도 범위에서 복수의 영역(11)에 대한 온도 제어를 할 수 있다.
또한, 도 4를 참조하면 온도차이(dT)는 위치에 따라 달라질 수 있다. 이것은 공통 가열부(50)에 의해 전달되는 열이 실링 바(10)의 길이 방향으로 일정하지 않음을 의미한다.
본 발명에 따른 복수의 서브 가열부(20)를 이용함으로써, 서로 다른 위치의 서로 다른 온도차이(dT)를 각각 조절할 수 있다.
도 5는 공통 가열부 및 서브 가열부의 제어 구조를 설명하는 도면이다.
본 실시형태에 따른 이차전지 실링공정용 히터에서, 공통 가열부(50)와 복수의 서브 가열부(20) 각각은, 입력되는 전류량을 제어하는 전류컨트롤러(21)를 가지며, 전류컨트롤러(21)에 의해 독립적으로 제어된다.
이때, 복수의 서브 가열부(20)는, 바람직하게는 각각의 전원공급기(22)를 더 구비할 수 있다.
일반적으로 전력을 이용한 가열 장치는, 가열장치에 인가되는 전류에 비례하여 가열된다.
본 실시형태에서는 공통 가열부(50) 및 복수의 서브 가열부(20) 각각에 전류컨트롤러(21)를 배치함으로써, 각각의 온도를 독립적으로 할 수 있다.
또한 각각에 전원공급기(22)를 더 구비함으로써, 전원공급기의 소비 전력의 한계를 공유하지 않는다.
또한 본 실시형태에 따른 이차전지 실링공정용 히텅에서, 공통 가열부(50)와 복수의 서브 가열부(20)는, 열선으로 구비된다.
도 6은 서브 가열부의 배치 구조를 설명하는 도면이다.
도 6을 참조하면, 본 실시형태에 따른 이차전지 실링공정용 히터에서, 복수의 서브 가열부(20)는, 실링 바(10)의 양 끝단에서 중앙부로 이동하면서 간격(dL)이 넓어지도록 배치된다.
이때 복수의 영역(11) 각각의 부피도, 실링 바(10)의 양 끝단에서 중앙부로 이동하면서 점차 커질 수도 있다.
인접하는 복수의 영역(11) 사이에, 완벽한 단열수단이 형성되지 않으면, 상호간에 열 전달 현상이 발생할 수 있다.
즉, 복수의 서브 가열부(20) 각각에서 발생한 열이 해당하는 복수의 영역(11) 각각을 가열한 후, 인접한 또 다른 복수의 영역(11)으로 전달될 수 있다.
복수의 서브 가열부(20)가 서로 가까이 밀집한 경우에, 서로에게 전달된 열에 의해서 각 영역의 온도가 더욱 상승할 수 있다.
반면에 복수의 서브 가열부(20)가 충분히 이격되어 배치되면, 복수의 서브 가열부(20) 자체의 가열에 의한 온도만 해당하는 복수의 영역(11)을 가열한다.
따라서 인접한 서브 가열부(20)로 부터의 열전달에 의한 추가적인 가열 현상은 발생하지 않는다.
또한, 실링 바(10)의 표면에서는, 불가피하게 공기에의한 열 방출(heat dissipation) 현상이 발생한다.
상술한 바와 같이 실링 바(10)의 중앙부는 실린더 및 단열층이 배치됨으로써, 실링 바(10)의 표면이 공기중에 노출되는 영역이 좁다.
그러나 도 6에 도시된 실링 바(10)의 양 끝단 A 영역에서는, 넓은 표면적이 공기와의 접촉한다. 따라서 열 방출 현상이 실링 바(10)의 중앙부보다 활발하다.
즉, 실링 바(10) 양 끝단에서 단위 시간당 열손실은, 실링 바(10) 중앙부에서의 단위 시간당 열손실 보다 크다.
따라서, 도 6과 같이 복수의 서브 가열부(20)를 배치하면, 실링 부(10)의 양 끝단에서, 열 방출에 따른 손실을 보상할 수 잇다.
본 발명에 따른 이차전지 실링공정용 히터의 또 다른 실시형태에서 실링 바는, 그 중앙부에서 길이 방향 양끝단으로 이동하면서 방열효율(heat dissipation efficiency)이 낮아지도록 설계될 수 있다.
상술한 바와 같이 실링 바의 중앙부에는 단열층이 배치됨으로써 실린더를 통한 열의 방출이 차단된다.
그러나, 실링 바의 양 끝단부에서는 공기와의 접촉으로 인한 열 방출 현상이 발생한다. 특히 실링 바의 표면에서 가열된 공기는 대류를 통해 상승하고, 다시 가열되지 않은 공기가 유입된다.
따라서 실링 바 양 끝단에서의 열방출 현상은 끊임없이 지속된다.
일반적으로 실링 바는 1회 가열한 후, 많은 수의 이차전지 파우치 포일을 실링해야 한다. 즉, 이차전지 파우치 포일의 실링공정이 수행되는 동안, 실링온도를 일정하고 정밀하게 유지해야 한다.
상술한 바와 같은 특정한 영역 즉 실링 바의 양 끝단에서, 열 방출 현상이 지속되면, 지속적으로 복수의 서브 가열부가 가열작동을 계속해야 한다.
그러나 실링 바를 그 위치에 따라 다른 방열효율을 갖도록 함으로써, 열 방출을 최소화 할 수 있다.
방열효율을 낮아지도록 하기 위해서, 실링 바는 바람직하게는, 그 중앙부에서 길이 방향 양끝단으로 이동하면서, 길이 방향의 수직 방향의 단면의 둘레가 감소하도록 설계될 수 있다.
단면의 둘레가 감소하는 형상으로는, 원형이 있다. 즉 실링 바의 길이를 따라 단면 형상을 원형으로 형성하면, 중앙부에서 보다 표면적이 감소한다.
또한 돌출 형상이 형성되지 않기 때문에 열 방출 효율이 낮아질 수 있다.

Claims (7)

  1. 실링 대상이 되는 파우치 포일을 가열 가압하는 실링 바;
    상기 실링 바의 내측에 길이방향으로 내장되며, 상기 실링 바의 길이방향으로 구분된 복수의 영역에 각각 독립적으로 열을 공급하도록 구비되는 복수의 서브 가열부;
    상기 실링 바에 구비되며, 상기 파우치 포일과 접촉되는 면의 위치에 따른 온도를 감지하는 온도감지부; 및
    상기 온도감지부에 의해 감지된 온도를 기준으로 상기 복수의 서브 가열부의 가열온도를 제어하는 제어부;를 포함하는 이차전지 실링공정용 히터.
  2. 청구항 1에 있어서,
    상기 실링 바의 내측에 길이방향으로 내장되며, 상기 복수의 서브 가열부에 의해 커버되는 전 영역에 열을 공급하도록 구비되는 공통 가열부;를 가지는 이차전지 실링공정용 히터.
  3. 청구항 2에 있어서,
    상기 실링 바는, 상기 공통 가열부가 내장되는 수용홈;을 가지며,
    상기 복수의 서브 가열부에 의해 열이 공급되는 상기 복수의 영역은, 상기 수용홈의 전체 길이를 커버하는 이차전지 실링공정용 히터.
  4. 청구항 2에 있어서,
    상기 공통 가열부와 상기 복수의 서브 가열부는, 각각은 입력되는 전류량을 제어하는 전류컨트롤러를 가지며, 상기 전류컨트롤러에 의해 독립적으로 제어되는 이차전지 실링공정용 히터.
  5. 청구항 2에 있어서,
    상기 공통 가열부와 상기 복수의 서브 가열부는, 열선으로 구비되는 이차전지 실링공정용 히터.
  6. 청구항 1에 있어서,
    상기 복수의 서브 가열부는, 상기 실링 바의 길이 방향 양 끝단에서 중앙부로 이동하면서 간격이 넓어지도록 배치되는 이차전지 실링공정용 히터.
  7. 청구항 1에 있어서,
    상기 실링 바는, 그 중앙부에서 길이 방향 양끝단으로 이동하면서 방열효율(heat dissipation efficiency)이 낮아지는 이차전지 실링공정용 히터.
PCT/KR2020/009789 2019-07-24 2020-07-24 이차전지 실링공정용 히터 WO2021015589A1 (ko)

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CN202080011849.2A CN113396641A (zh) 2019-07-24 2020-07-24 用于二次电池的密封处理的加热器
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