CN107408720B - 袋型二次电池的密封装置 - Google Patents

袋型二次电池的密封装置 Download PDF

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CN107408720B
CN107408720B CN201680016695.XA CN201680016695A CN107408720B CN 107408720 B CN107408720 B CN 107408720B CN 201680016695 A CN201680016695 A CN 201680016695A CN 107408720 B CN107408720 B CN 107408720B
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lead
sealing device
block
sealing
guides part
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CN107408720A (zh
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林圣伦
金志贤
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LG Energy Solution Ltd
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LG Chem Ltd
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Priority claimed from PCT/KR2016/003121 external-priority patent/WO2016159607A1/ko
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • 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 of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/183—Sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • 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
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    • 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
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    • 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
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    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/02—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • H—ELECTRICITY
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    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
    • 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

Abstract

提供一种袋型二次电池的密封装置，能够通过在密封槽上持续地定位引线来防止电解质渗漏，从而完全地密封二次电池。根据本发明公开内容的密封装置是一种袋型二次电池的密封装置，其密封电极组件安装于其中的袋壳体。所述密封装置包括上密封块和下密封块，其中上密封块和下密封块中的至少一个密封块具有密封槽，密封槽具有形成在对应于袋型二次电池的引线的位置处的倾斜台阶部，以及用于将引线定位于密封槽的引线引导件安装在密封块的前方。

Description

袋型二次电池的密封装置
技术领域
本公开内容涉及一种用于制造袋型二次电池的密封装置，更具体地，涉及一种用于制造袋型二次电池的密封装置，所述袋型二次电池具有用于密封袋壳体和引线的改善的密封部。
本申请要求于2015年4月2日在韩国提交的韩国专利申请第10-2015-0046932号和于2016年3月15日在韩国提交的韩国专利申请第10-2016-0030974号的优先权，通过引用将上述专利申请的公开内容结合在此。
背景技术
针对诸如数码相机、手机、笔记本电脑、混合动力汽车等等的高科技领域中的可充电二次电池的发展正在积极地进行研究。二次电池包括镍镉电池、镍金属氢化物电池、镍氢电池和锂二次电池。其中，锂二次电池经串联用作便携式电子设备的电源或用在高输出混合动力汽车中。锂二次电池应用广泛，因为锂二次电池的工作电压比镍镉电池或镍金属氢化物电池高三倍，并且锂二次电池的每单位重量的能量密度也很优异。
锂二次电池可以制成包括圆柱形(cylinder type)或棱柱形(prismatic type)在内的各种形状。近来，柔性袋型(pouch type)二次电池正备受关注。
图1出示了一种一般的袋型二次电池10和用于密封该袋型二次电池10的密封装置20。
参考图1，袋型二次电池10包括由上袋15a、下袋15b和引线17构成的袋壳体。引线17从安装在袋15a、15b内的电极组件(未示出)延伸以突出于袋15a、15b之外。并且，沿着袋15a、15b的边缘形成密封部15以严密地封住袋15a、15b。
通过提供在袋密封部15之上或之下的上升/下降构件30，密封装置20安装为可上升的和可下降的。当密封装置20上升和下降时密封装置20压缩密封部15。此时，密封装置20经其内设的加热构件(未示出)所产生的热量加热密封部15。也就是说，随着密封装置20加热并压缩密封部15，袋15a、15b的聚合物熔融，密封得以实现。
为了防止袋15a、15b中的电解质渗透物经由引线17和袋15a、15b的接合处渗漏，如图2所示，在引线17上涂覆薄树脂层的膜18。在图2中，(a)是从上方看到的引线的视图，(b)是沿(a)的线B-B'的截面图。
然而，尽管涂覆有膜18，引线17通常具有50-1000μm厚度，其并不能通过热封来完全地密封，这是因为上袋15a和下袋15b如图3所示设置，在引线17对应于上袋15a和下袋15b的部分处电解质会渗漏。也就是说，因为引线17具有如上所述的预定厚度，所以在袋15a、15b连接之后，由于引线17的厚度而导致接合部变松。如果引线周围的上壳体和下壳体如上所述般的没有完全地接合，电解质会在引线周围渗漏，因此在重复的充电和放电之后，二次电池的电性能会降低。为了解决这一问题，如图4所示，公开一种改善的密封装置，该密封装置在将引线17设置于上加热块和下加热块间之后密封引线17。
参照图4，密封装置40装配了设有加热构件(未示出)的上加热块41和下加热块42，在密封期间引线位于其上的密封槽41a、42a形成在加热块41、42对应于上壳体15a和下壳体15b之间所设置的引线17的部分上。密封槽41a、42a构造为引线17位于其上，并使除了引线17以外的部分被充分地压缩以保证密封。利用密封槽41a、42a抵消引线的厚度来密封引线17。
然而，因为在实际密封工艺中，引线17并不总是位于密封槽41a、42a上，如图5所示，考虑到引线17的公差，密封槽41a、42a通常具有余量d。一般而言，密封槽41a、42a形成为具有比引线17的宽度宽出大约10％的宽度。
如图6中虚线箭头所示，即使当引线17所处位置不固定时，密封工艺也能够执行。然而，由于所述余量，通过密封槽41a、42a和引线17的宽度差而形成没有被密封装置40压缩的未密封部，即，所述余量。随着引线17的厚度变大以及随着密封槽41a、42a的深度和宽度增加，未密封部也变得更宽。此外，如果改变密封条件和引线条件，在密封槽42a和膜18之间的空隙空间或间隙不会被填满，如图6所示。在这种情况下，密封没有彻底地完成，电解质渗漏可能会发生。
发明内容
技术问题
本公开内容涉及提供一种袋型二次电池的密封装置，其能够通过在密封槽上持续地定位引线来防止电解质渗漏，从而完全地密封二次电池。
技术方案
在一个方面中，本公开内容提供一种袋型二次电池的密封装置，其密封电极组件安装于其中的袋壳体，其中密封装置包括上密封块和下密封块，所述上密封块和下密封块中的至少一个密封块具有密封槽，所述密封槽具有形成在对应于袋型二次电池的引线的位置处的倾斜台阶部，以及用于将引线定位于密封槽上的引线引导件安装在密封块的前方。
具体地，引线引导件可以是一对块体，所述块体形成有引线能够容纳其间的间隙空间。块体面向引线的边缘部可倒角成锥形。间隙空间可设置成距离引线的宽度为0.1-2.0mm。
当进行密封工艺时，引线引导件比密封块可更早地确定引线的位置。或者，当引线引导件与密封块同时应用时，引线引导件可确定引线的位置。
块体可具有大致六面体形状，并且锥形表面可以是平坦的、向上凸起的或者向下凹陷的。
引线引导件可以垂直地操作同时保持间隙空间以便确定引线的位置。
引线引导件可以侧向地操作以调整间隙空间以便确定引线的位置。
引线引导件也可以用枢转方式操作以调整间隙空间以便确定引线的位置。
有益效果
如果根据本公开内容安装引线引导件，在密封工艺期间将引线定位于密封槽上的精度显著地提高。据此，在密封槽和引线之间的间隙能够得以最小化，并且袋密封部能够均匀地形成并彻底地密封。因此，可以防止袋内的电解质向外部泄露，并且可以提高袋型二次电池的密封性和可靠性。
附图说明
附图举例说明本公开内容的具体的实施方式，且与前述公开内容一起用以提供对本公开内容的技术特征的进一步理解，因而，本公开内容不应被解释为局限于这些附图。
图1示出了一般的袋型二次电池和一般的密封装置。
图2示出了涂覆在引线上的薄树脂层的膜。
图3是示出了用现有的密封装置密封的引线的截面图。
图4示出了另一种现有的装有密封槽的密封装置。
图5和图6示出了在现有的密封装置中在密封槽和引线膜之间的间隙的产生。
图7是根据本公开内容的密封装置的示意性透视图。
图8是在引线位于密封装置上的状态下的图7的正视图，图9是截面图。
图10示出了在根据本公开内容的密封装置中能够包括的引线引导件的各种构造的截面图。
图11示出了在根据本公开内容的密封装置中所能够包括的引线引导件的各种操作。
具体实施方式
下文中，参照附图详细地描述本公开内容的具体的示例性实施方式。然而，本公开内容并不局限于如下所述的示例性实施方式，而是会以各种不同的形式得以实施。提供示例性实施方式以使得本公开内容是完整的，并使本领域普通技术人员彻底地理解本公开内容的范围。在附图中，为了清楚起见形状等要素会被放大，并且相同的数字符号代表相同的元件。
图7是根据本公开内容的密封装置的示意性透视图。图8是在引线位于密封装置上的状态下的图7的正视图，图9是截面图。
首先，如图7所示，根据本公开内容的密封装置140包括两个条形棒形式的上密封块141和下密封块142，以便自上和自下地热压袋的密封部。在上密封块141和下密封块142中，包括倾斜台阶部的密封槽141a、142a形成在对应于袋型二次电池的引线117的位置处。引线引导件160安装在密封块141、142的前方以使引线117能位于密封槽141a、142a上。
密封块141、142安装为可上升的和可下降的。可使用广泛使用的圆筒等作为用于上升和下降的构件。然而，并不局限于此，任何可让密封块141、142上升和下降的构件都可使用。
密封装置140可具有密封槽141a、142a，密封槽141a、142a形成在对应于引线在相同方向突出的单向锂二次电池的引线的位置处。或者，密封装置140可具有所述密封槽141a、142a，密封槽141a、142a形成在对应于引线在相反方向突出的双向锂二次电池的引线的位置处。
密封槽141a、142a可仅形成在密封块141、142的一侧上。密封槽141a、142a的深度可以从引线厚度的1/2到引线厚度。当密封槽141a、142a形成在密封块141、142的两侧上时，每个密封槽141a、142a的深度可以是引线厚度的1/2。
密封槽141a、142a具有如图所示的倾斜台阶部。倾斜台阶部可形成为具有两个以上的台阶。
在从容纳于袋壳体中的电极组件突出的引线位于密封槽141a、142a上的状态下，密封装置140执行密封。
电极组件可以是以下的一种：包卷型电极组件，通过顺序地堆叠一个或多个阳极、隔板和阴极并将其缠绕而制得；堆叠折叠型电极组件，通过将其中顺序地堆叠有阳极、隔板和阴极的单元电池布置在长膜形式的隔板上并且在一个方向将其缠绕而制得；以及堆叠折叠型电极组件，通过将其中顺序地堆叠有阳极、隔板和阴极的单元电池布置在长膜形式的隔板上并以之字形的方式将其缠绕而制得。
同时参照图7和图8，根据本公开内容的引线引导件160是一对块体160a、160b，其形成引线117能够容纳于其间的间隙空间D。
块体160a、160b可具有大致六面体形状，块体160a、160b朝向引线117的边缘部可被倒角成锥形。因为相较于下部，倒角部之间的间隙增加，所以在引线117的定位期间可以改善工艺灵活性。
参考放大的截面图图9，当定位引线时，引线引导件160的高度可设置为高于引线117。一般来说，块体160a、160b的末端之间的宽度设置为大于密封槽141a、142a的宽度以确保稳定性。通过驱动构件，引线引导件160可以垂直地和侧向地移动。块体160a、160b可以相对于彼此侧向地移动，以便对应于引线的尺寸调整块体160a、160b之间的间隙空间D。一旦根据引线条件确定间隙空间D，则在整个工艺过程中所述间隙空间D不会改变。然而，如果输入另一条件的引线，则重置间隙空间D以用于对应的工艺。
具体地，块体160a、160b可以由弹性材料制成，使得即使在引线117定位期间当它们与引线117接触时，也不会对引线117施加冲击。另外，具体地，为了避免电气故障，块体160a、160b可以由绝缘材料制成。间隙空间D可设置成距离引线的宽度为0.1-2.0mm。也就是说，块体160a、160b间的距离d'与引线117的边缘之间的距离可以是0.1-2.0mm。
构成袋壳的上袋和下袋均由内树脂层和外金属箔(主要是铝箔)制成(覆盖金属箔层的附加树脂层可形成为最外层)，并且通过将由热塑性树脂(例如，聚丙烯)形成的内树脂层进行热压来执行密封。为此，在恒定的温度和压力下将袋的密封部加热和压缩。
引线117是与位于上方和下方的作为密封剂的聚合物膜118一起制备。通过沿着袋边缘上下形成密封槽141a、142a以及在恒定压力和温度下从上到下地压缩密封部来执行密封。具体地，施加到密封部的压力可以是0.1-5MPa。在密封期间，施加到密封部的压力可通过在密封块141、142处装配压力计来保持恒定。具体地，施加到密封部的热可保持在25-500℃。当温度低于25℃时，密封可能无法充分地完成，并且可能无法传递足够的用于蒸发电解质的能量。并且，当温度高于500℃时，袋本身可能会被该热量损坏。
因为引线引导件160改善了引线117的定位精度，所以在密封工艺期间引线的位置保持恒定，如图9所示。从放大的截面图图9，可以看出，密封槽141a、142a与膜118之间的间隙几乎消失，这是因为由于引线引导件160的缘故，在进行密封期间的定位误差可以减少。
当进行密封工艺时，引线引导件160可以比密封块141、142更早地确定引线117的位置。或者，当引线引导件160与密封块141、142同时应用时，引线引导件160可确定引线117的位置。
在参照图7-图9描述的密封装置140中，引线引导件160由一对块体160a、160b组成，并且块体160a、160b的边缘部倒角成锥形。
图10示出了在根据本公开内容的密封装置中能够包括的引线引导件的各种构造的截面图。
参考图10，块体160a、160b的锥形表面可以是如(a)所示平坦的、如(b)所示向上凸起的或者如(c)所示向下凹陷的。(a)的优点在于容易加工。(b)的优点在于在引线定位期间能够减少对引线的物理冲击。(c)的优点在于在引线定位期间改善工艺灵活性。
上文已描述，引线引导件160的块体160a、160b能够垂直地和侧向地移动，并且块体160a、160b能够相对于彼此侧向地移动。图11示出了根据本公开内容的密封装置中能够包括的引线引导件的各种操作。
在图11中，(a)示出引线引导件160的块体160a、160b的向上和向下操作，(b)示出引线引导件160的块体160a、160b的侧向操作。(a)和(b)的组合操作也是可能的。
在根据引线条件设置间隙空间D之后执行工艺的情形下，块体160a、160b可安装有间隙空间D，然后块体160a、160b可以在保持所述间隙空间D的同时，从密封装置的底部向上移动到引线位置，如(a)中所示。
或者，如(b)所示，在定位引线之前，块体160a、160b可以相对于彼此远于间隙空间D来安置，然后在定位引线期间，可以侧向地操作块体160a、160b以匹配所述间隙空间D。
图11(c)示出了不同于垂直或侧向操作的枢转方式操作。如(c)所示，块体160a、160b可预先水平地安置，然后当需要定位引线时，围绕块体160a、160b的轴进行旋转，使得块体160a、160b之间的间隔变成间隙空间D。
如上所述，通过装配引线引导件160，本公开内容能够极大地改善具有各种厚度的引线的二次电池的引线周围的袋壳体的密封性。通过确保证引线与袋壳体的紧密连接，电池的密封性可以得到改善，并因此，未密封部可以显著地减少。
此外，引线能够恒定地定位于密封槽上，所以当设计密封槽时，无需考虑引线的横截面的公差。也就是说，可以使密封槽具有与引线几乎相同的宽度而无需余量，并且容易将引线精确地置于密封槽上。因为引线被密封为稳定地位于密封槽上，所以能够精确地且均匀地执行密封，并且不存在电解质渗漏的风险。
目前，对于高容量、高输出、中到大型二次电池的需求正在快速增长，引线的厚度也随着其中所使用的单元电池的容量而增加。随着引线的尺寸增大，没有被现有密封装置压缩的未密封部扩大并且无法按照所期望地完成密封，因此降低了密封的可靠性。然而，根据本公开内容，因为无论引线的厚度如何都可以进行精确的定位，所以密封的可靠性得以确保。
已经详细地描述本公开内容。然而，应该理解的是，因为对本领域技术人员来说，通过这一详细的描述，在本公开内容范围内的各种改变和修改将变得显而易见的，所以在表明本公开内容的优选的实施方式时，仅通过举例说明的方式给出所述详细的说明和具体实施例。

Claims (16)

1.一种袋型二次电池的密封装置，所述密封装置密封电极组件安装于其中的袋壳体，其中
所述密封装置包括上密封块和下密封块，且所述上密封块和下密封块中的至少一个密封块具有密封槽，所述密封槽具有形成在对应于所述袋型二次电池的引线的位置处的倾斜台阶部，
用于将所述引线定位于所述密封槽上的引线引导件安装在所述密封块的前方，
所述引线引导件是一对块体，所述块体形成有所述引线能够容纳其间的间隙空间，以及
所述块体面向所述引线的边缘部倒角成锥形。
2.根据权利要求1所述的密封装置，其中所述间隙空间设置成距离所述引线的宽度为0.1-2.0mm。
3.根据权利要求1所述的密封装置，其中所述引线引导件能够垂直地和侧向地移动。
4.根据权利要求1所述的密封装置，其中所述块体的末端之间的宽度大于所述密封槽的宽度。
5.根据权利要求1所述的密封装置，其中所述块体能够相对于彼此侧向地移动。
6.根据权利要求1所述的密封装置，其中所述引线引导件由弹性材料制成。
7.根据权利要求1所述的密封装置，其中所述引线引导件由绝缘材料制成。
8.根据权利要求1所述的密封装置，其中所述引线引导件比所述密封块更早地确认所述引线的位置。
9.根据权利要求1所述的密封装置，其中当所述引线引导件与所述密封块同时应用时，所述引线引导件确定所述引线的位置。
10.根据权利要求1所述的密封装置，其中，当确定所述引线的位置时，所述引线引导件的高度高于所述引线。
11.根据权利要求1所述的密封装置，其中所述锥形表面是平坦的。
12.根据权利要求1所述的密封装置，其中所述锥形表面是向上凸起的。
13.根据权利要求1所述的密封装置，其中所述锥形表面是向下凹陷的。
14.根据权利要求1所述的密封装置，其中所述引线引导件垂直地操作同时保持所述间隙空间以便确定所述引线的位置。
15.根据权利要求1所述的密封装置，其中所述引线引导件侧向地操作以调整所述间隙空间以便确定所述引线的位置。
16.根据权利要求1所述的密封装置，其中所述引线引导件用枢转方式操作以调整所述间隙空间以便确定所述引线的位置。
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