CN104584259A - 用于密封二次电池的袋状壳体的设备和方法 - Google Patents

用于密封二次电池的袋状壳体的设备和方法 Download PDF

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CN104584259A
CN104584259A CN201380043446.6A CN201380043446A CN104584259A CN 104584259 A CN104584259 A CN 104584259A CN 201380043446 A CN201380043446 A CN 201380043446A CN 104584259 A CN104584259 A CN 104584259A
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bag
compression clamp
shaped housing
pressure
hermetic unit
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CN104584259B (zh
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赵承洙
崔丞惇
崔大植
金洪信
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LG Energy Solution Ltd
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LG Chemical Co Ltd
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
    • 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
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/326—Shaping the burr, e.g. by 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/328—Leaving the burrs unchanged for providing particular properties to the joint, e.g. as decorative effect
    • B29C66/3282—Leaving the burrs unchanged for providing particular properties to the joint, e.g. as decorative effect for reinforcing the joint
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • 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
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    • 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
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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
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    • 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
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    • 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
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    • B29C66/80—General aspects of machine operations or constructions and parts thereof
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    • 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
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • H—ELECTRICITY
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    • 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
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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)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Secondary Cells (AREA)

Abstract

公开了一种用于密封袋状壳体的设备和方法，其能够在获得二次电池的绝缘的同时优化袋状壳体的内密封部分的密封形式或者结构。根据本发明的袋状壳体密封设备是用于密封袋型二次电池的袋状壳体的设备，其包括：上压缩夹具，用于将压力从袋状壳体的密封部分的上部在向下方向上施加；和下压缩夹具，用于将压力从袋状壳体的密封部分的下部在向上方向上施加，其中上压缩夹具和/或下压缩夹具具有相对于袋状壳体的内端部和外端部彼此不同的压力深度。

Description

用于密封二次电池的袋状壳体的设备和方法
技术领域
本公开涉及一种用于密封袋型二次电池的袋状壳体的设备和方法，并且更加特别地，涉及一种如下用于密封袋型二次电池的袋状壳体的设备和方法，其可以在袋型二次电池的制造中通过增强在袋状壳体上执行的密封工艺来改进袋型二次电池的绝缘。
本申请要求于2012年12月28日提交的韩国专利申请No.10-2012-0156106和于2013年12月27日提交的韩国专利申请No.10-2013-0165525的优先权，其全部公开内容通过引用被合并在此。
背景技术
由于其可容易地应用于各种产品的特性和诸如高能量密度的电特性，二次电池不仅通常被应用于便携式设备，而且被普遍地应用于由电动马达驱使的电动车辆(EV)、混合动力车辆(HV)或者蓄能系统。
二次电池由于显著地减少化石燃料的使用和不产生来自能源使用的副产品的其主要优点而赢得越来越多的关注，使其成为新的环保和节能的能源。
图1是示意性地图示根据现有技术的袋型二次电池的构造的分解透视图。参考图1，传统的袋型二次电池1包括电极组件10和作为基础结构的袋状壳体20。
在此，电极组件10包括阴极板、阳极板以及分隔物，该分隔物被介于阴极板和阳极板之间以使阴极板与阳极板电隔离，并且电极组件10被装备有从阴极板延伸的阴极突片和从阳极板延伸的阳极突片。
通过电阻焊接方法、超声焊接方法或者激光焊接方法，可以将阴极突片和阳极突片联接到阴极引线11和阳极引线12，并且电极引线穿过袋状壳体被暴露以执行将二次电池电连接到外部应用装置而作为二次电池的电极的功能。
电极组件10与电解质溶液一起被引入到袋状壳体20中。
袋状壳体20可以被分成上壳体21和下壳体22，并且可以基于接纳电极组件10的部分的位置而被称为单帽或者双帽。
袋状壳体20具有铝薄膜，该铝薄膜被插入在袋状壳体20中以保护被布置在袋状壳体20中的电解质溶液和电极组件10并且弥补电池单元的电化学特性并且改善热阻。在本实例中，为了确保电池单元与外部环境绝缘，铝薄膜可以在外表面上具有被涂覆有绝缘材料的绝缘层，该绝缘材料例如聚对苯二甲酸乙二醇酯(PET)树脂或者尼龙树脂。
在密封工艺期间，通过热熔合可以使袋状壳体20沿着其外周被接合或者被粘附。为了这样做，将被浇铸的聚丙烯(CPP)或者聚丙烯(PP)的粘合层形成在上壳体21的下表面和下壳体22的上表面上以实现其间的粘附。除了袋状壳体20的粘附之外，粘合层也用作绝缘层以防止在铝层和被注入到袋状壳体20中的电解质之间的导电。
图2是图1的截面A和B的扩大的横截面图。参考图2，上壳体21具有按照次序的绝缘层25、铝层24以及粘合层23的预定分层结构，并且下壳体22具有粘合层23、铝层24以及绝缘层25的结构。
为了密封袋状壳体20，热和压力可以被提供给上壳体21的下粘合层23和下壳体22的上粘合层23。
图3是图示如下状态的放大横截面图，其中当根据现有技术密封袋状壳体时由于密封部分的不严密的密封导致铝层被暴露于电解质。参考图3，当在如由C表示的袋状壳体20的密封部分处出现错误的密封时，粘合层23可以在放置电极组件10的密封部分的内侧处具有减小的厚度。如果被形成在密封部分的内侧处的粘合层23不厚，如由D指示的，铝层24的一部分可以被暴露于电解质。
当在袋状壳体20的密封工艺期间由压力强制密封部分的粘合层23在侧方向上特别地在二次电池的外侧方向上移动时，这可能出现。而且，在这样的情况下，二次电池出现介电击穿，引起严重安全问题诸如由于内部短路导致的燃烧、爆炸或者火灾，以及对二次电池的损坏。
发明内容
技术问题
设计出本发明以解决上述问题，并且因此，本公开旨在提供用于密封袋状壳体的方法和设备，当密封袋型二次电池时该方法和设备可以稳定地确保密封部分的绝缘。
通过下面的描述能够理解本公开的这些和其它的目的和方面，并且从本公开的实施例中这些和其它的目的和方面将会变得显而易见。而且，应理解的是，通过在本公开及其组合的范围中的任何方式可以实现本公开的这些和其它目的和方面。
技术解决方案
为了实现以上目的，根据本公开的一个方面的用于密封袋型二次电池的袋状壳体的设备包括：上压缩夹具，该上压缩夹具在向下方向上将压力施加到袋状壳体的密封部分；和下压缩夹具，该下压缩夹具在向上方向上将压力施加到袋状壳体的密封部分，其中上压缩夹具和下压缩夹具中的至少一个在内侧端和外侧端处以不同的深度将压力施加到袋状壳体。
优选地，上压缩夹具和下压缩夹具中的至少一个倾斜且与袋状壳体接触。
更加优选地，以如下方式执行倾斜，即：在上压缩夹具和下压缩夹具中的至少一个的外侧端处向袋状壳体施加更高的压力。
而且，优选地，上压缩夹具和下压缩夹具中的至少一个具有台阶，该台阶被形成在作用到袋状壳体上的压力施加表面上。
更加优选地，台阶形成为在外侧端处比在内侧端处高。
而且，优选地，台阶的数目是至少两个。
而且，优选地，上压缩夹具和下压缩夹具中的至少一个具有在作用到袋状壳体上的压力施加表面上的斜坡。
更加优选地，斜坡形成为在上压缩夹具和下压缩夹具中的至少一个的外侧端处比在内侧端处更高。
而且，优选地，上压缩夹具和下压缩夹具中的至少一个将热与压力一起施加到袋状壳体的密封部分。
而且，优选地，在施加压力之前，上压缩夹具和下压缩夹具中的至少一个对袋状壳体的密封部分进行预热。
为了实现上述目的，根据本公开的另一方面的用于制造二次电池的设备包括用于密封袋状壳体的上述设备。
为了实现上述目的，根据本公开的又一方面的用于密封袋型二次电池的袋状壳体的方法包括：将电极组件接纳在袋状壳体的内部空间中；和在向上和向下方向上将压力施加到袋状壳体的密封部分，其中压力的施加包括以不同的深度将压力施加到袋状壳体。
优选地，压力的施加包括以在外侧处以比在内侧处更大的深度施加压力。
更加优选地，压力的施加包括：将压力施加到袋状壳体的上压缩夹具和下压缩夹具中的至少一个倾斜，且与袋状壳体接触。
更加优选地，以如下方式执行倾斜，即：在上压缩夹具和下压缩夹具中的至少一个的外侧端处向袋状壳体施加更高的压力。
而且，优选地，压力的施加包括将热与压力一起施加到袋状壳体的密封部分。
而且，优选地，用于密封袋型二次电池的袋状壳体的方法进一步包括在施加压力之前对袋状壳体的密封部分进行密封。
有利的效果
根据本公开，在袋型二次电池的袋状壳体的密封工艺中，在内侧处的密封部分的密封形状可以被优化以确保二次电池的绝缘。
特别地，根据本公开，在袋状壳体的密封部分的密封工艺中，通过在袋状壳体的内侧处强制粘合层在二次电池的内侧方向上而不是外侧方向上移动，可以在密封部分的内侧处形成厚的绝缘层。
因此，在密封部分的密封期间可以防止袋状壳体的铝层被暴露，使得在电解质和铝层之间的导电可以被防止，并且袋状壳体可以维持更加机械实体的形状。
因此，根据本公开的此方面，可以稳定地确保二次电池的袋状壳体的绝缘，并且可以有效地防止由内部短路引起的燃烧、爆炸或者火灾。
附图说明
附图图示了本公开的优选实施例并且连同前述的公开一起用于提供对本公开的技术精神的进一步理解，并且因此，本公开没有被解释为受到附图的限制。
图1是示意性地图示根据现有技术的袋型二次电池的构造的分解透视图。
图2是图1的截面A和B的放大的横截面图。
图3是图示如下状态的放大横截面图，其中当根据现有技术密封袋状壳体时由于密封部分的不严密的密封导致铝层被暴露于电解质。
图4是示意性地图示根据本公开的示例性实施例的用于密封袋状壳体的设备的构造的图。
图5是图示如下状态的放大横截面图，其中根据本公开密封袋状壳体。
图6是示意性地图示根据本公开的另一示例性实施例的用于密封袋状壳体的设备的构造的图。
图7是示意性地图示根据本公开的又一示例性实施例的用于密封袋状壳体的设备的构造的图。
图8是示意性地图示根据本公开的又一示例性实施例的用于密封袋状壳体的设备的构造的图。
图9是示意性地图示根据本公开的又一示例性实施例的用于密封袋状壳体的设备的构造的图。
图10是示意性地图示根据本公开的示例性实施例的密封袋状壳体的方法的流程图。
具体实施方式
在下文中，将会参考附图来详细描述本公开的优选实施例。在描述之前，应当理解的是，不应将说明书和所附权利要求中所使用的术语解释为限于一般和字典含义，而应基于为了进行最佳解释而允许本发明人适当限定术语的原理，基于与本发明的技术方面相对应的含义和构思来解释术语。
因此，在此提出的描述只是仅为了举例说明的优选示例，而非旨在限制本发明的范围，所以应理解的是，在不背离本发明的精神和范围的情况下，可对其作出其它等同物和修改。
而且，在本公开的描述中，当认为有关的公知的构造的特定解释可能晦涩本发明的本质时，其详细描述被省略。而是，可以提供示例性实施例使得本公开将会是彻底的和完全的，并且将会向本领域的技术人员完全地传达范围。在附图中，为了清楚、说明以及方便起见元件的相对尺寸和描述可以被夸大。
图4是示意性地图示根据本公开的示例性实施例的用于密封袋状壳体的设备的构造的图。参考图4，根据本公开的密封设备包括上压缩夹具100和下压缩夹具200。
上压缩夹具100被布置在袋状壳体300的密封部分的上方以在向下方向上将压力施加到密封部分。
下压缩夹具200被布置在袋状壳体300的密封部分的下方以在向上方向上将压力施加到密封部分。
上压缩夹具100在向下方向上将压力施加到袋状壳体300的密封部分，并且下压缩夹具200在向上方向上将压力施加到袋状壳体300的密封部分，使得可以在向上和向下方向上借助于压力来密封密封部分。
特别地，在本公开中，上压缩夹具100和下压缩夹具200中的至少一个在内侧端和外侧端处以不同深度施加压力。在此，外侧端表示如附图中的“o”所指示在上压缩夹具和下压缩夹具的压力施加表面110和210之中位于二次电池的外侧(图4中的左侧)处的部分，并且内侧端表示位于二次电池的内侧(图4中的右侧)处的部分，即，位于被接纳在袋状壳体的内部空间310中的电极组件400被布置的一侧处的部分，并且该内侧端由附图中的“i”指示。在此，压力施加表面110和210表示当借助于上压缩夹具100和下压缩夹具200施加压力时与袋状壳体300的密封部分接触的部分。
当在内侧端(i)和外侧端(o)处的压力施加深度不同时，密封部分的粘合层311的内侧厚度可以改变。特别地，当在外侧端(o)处的压力施加深度大于在内侧端(i)处的压力施加深度时，密封部分的粘合层311被强制在内侧方向上移动，使得粘合层311可以在密封部分的内侧处形成为比在外侧处厚。
优选地，为了对于袋状壳体300实现在内侧端和外侧端处的不同压力施加深度，上压缩夹具100和下压缩夹具200中的至少一个可以被构造成倾斜同时保持与袋状壳体300接触。
再次参考图4，在向上和向下方向上施加压力之后，上压缩夹具100和下压缩夹具200可以倾斜同时保持与袋状壳体300接触。当如在前述中所描述上压缩夹具100和下压缩夹具200倾斜时，对于袋状壳体300的在上压缩夹具100和下压缩夹具300的内侧端(i)和外侧端(o)处的压力施加深度可以不同。在本实例中，优选地，如在图4中所示，上压缩夹具100和下压缩夹具200的外侧部分可以倾斜相对于水平面比内侧部分大的角度。即，优选地，上压缩夹具100倾斜使得外侧部分比内侧部分低，并且下压缩夹具200倾斜使得外侧部分比内侧部分高。根据本实施例，借助于上压缩夹具100和下压缩夹具200的倾斜，可以在外侧端(o)处向袋状壳体300施加比在内侧端(i)处大的压力。因此，与在外侧处相比，粘合层311可以在密封部分的内侧处形成有更高的厚度。
同时，如在图4中的示例所示的倾斜描述，可以仅上压缩夹具100倾斜，并且显然地，相反，可以仅下压缩夹具200倾斜。
另一方面，为了倾斜，各种旋转装置可以被提供给上压缩夹具100和下压缩夹具200中的至少一个。例如，旋转装置可以被实现为旋转轴(a)和马达(未被示出)，并且可以给压缩夹具提供旋转力以使压缩夹具倾斜。即，马达可以旋转旋转轴(a)，并且压缩夹具可以在图4中指示的箭头方向上沿着旋转轴(a)旋转。然而，被装备有旋转轴(a)和马达的旋转装置仅是示例，并且本示例性的旋转装置没有限制根据本公开的用于密封袋状壳体的设备。
在图5中图示了借助于根据本公开的用于密封袋状壳体的设备来密封的示例性示例。
图5是图示根据本公开密封袋状壳体的状态的放大的横截面图。参考图5，当借助于根据本公开的用于密封袋状壳体的设备来密封袋状壳体300时，粘合层311可以在如由E指示的密封部分的内侧处形成有增大的厚度。因此，基于本公开的此方面，可以防止：由在密封部分的内侧处以减小的厚度形成的粘合层311导致铝层312的一部分暴露，并且防止在铝层312和电解质之间的后续导电。因此，根据本公开，可以稳定地确保袋状壳体300的绝缘。
而且，优选地，上压缩夹具100和下压缩夹具300中的至少一个可以具有在作用到袋状壳体300上的压力施加表面110和210上的台阶。
图6是示意性地图示根据本公开的另一示例性实施例的用于密封袋状壳体的设备的构造的图。
参考图6，台阶被形成在上压缩夹具100和下压缩夹具200中。如前所述，当台阶被形成在上压缩夹具100和下压缩夹具200中时，在上压缩夹具100和下压缩夹具200的内侧端(i)和外侧端(o)处的压力施加深度可以不同。即，当在向上和向下方向上台阶式上压缩夹具100和/或台阶式下压缩夹具200将压力施加到袋状壳体300的密封部分时，具有高台阶的部分具有比具有低台阶的部分更高的压力施加深度。在该实例中，台阶的高度(d)可以从几微米直到最大10毫米。
更加优选地，如在图6中所示，与内侧端(i)相比，台阶可以在外侧端(o)处被形成有更大的高度。根据本实施例，位于密封部分的外侧处的粘合层311被强制移向密封部分的内侧，使得可以在密封部分的内侧处形成厚的粘合层311。
虽然图6示出在上压缩夹具100和下压缩夹具200中分别形成台阶，但是这仅是示例，并且显然的是，台阶可以仅被形成在上压缩夹具100中，而可以不被形成在下压缩夹具200中，反之亦然。
同时，没有必要在上压缩夹具和/或下压缩夹具的压力施加表面110和210中的每一个处形成仅一个台阶，并且可以分别形成至少两个台阶。
图7是示意地图示根据本公开的又一示例性实施例的用于密封袋状壳体的设备的构造的图。
参考图7，对于上压缩夹具100和下压缩夹具200中的每一个形成两个台阶。根据此实施例，被顺次地形成在上压缩夹具和下压缩夹具的压力施加表面110和210上的台阶可以明确地将粘合层311被强制移动的方向引导至二次电池的内侧方向。
然而，本公开没有必要受到本示例性实施例的限制，并且可以在上压缩夹具100和下压缩夹具200之中的仅一个压缩夹具中形成至少两个台阶。而且，被形成在上压缩夹具100或者下压缩夹具200中的台阶的数目可以是至少三个。而且，用于每一个台阶的台阶之间的台阶高度和/或宽度可以是相等的，并且可以根据需要而不同。
同时，虽然图6和图7的实施例通过在上压缩夹具100和/或下压缩夹具200中形成台阶而对于袋状壳体300实现在内侧端和外侧端处的不同压力施加深度，但是在这一点上没有必要地限制本公开。
例如，为了对于袋状壳体300实现在内侧端和外侧端处的不同压力施加深度，上压缩夹具100和下压缩夹具200中的至少一个可以具有在作用到袋状壳体300上的压力施加表面110和210上的斜坡。将会参考图8描述本实施例。
图8是示意地图示根据本公开的又一示例性实施例的用于密封袋状壳体的设备的构造的图。
参考图8，上压缩夹具100的压力施加表面110具有斜坡。特别地，被形成在上压缩夹具100的压力施加表面110中的斜坡可以被优选地形成，使得上压缩夹具100的外侧端(o)比内侧端(i)高。根据本实施例，密封部分的粘合层311可以被强制在内侧方向上更加自然地移动，使得可以在密封部分的内侧处形成厚的粘合层311，并且因此更加稳定地确保袋状壳体300的绝缘可靠性。
然而，这仅是示例，并且显然的是，斜坡可以被形成在下压缩夹具200以及上压缩夹具100中，并且斜坡可以仅被形成在下压缩夹具200中。
图9是示意地图示根据本公开的又一示例性实施例的用于密封袋状壳体的设备的构造的图。
参考图9，压力施加表面210具有在下压缩夹具200的压力施加表面210中的台阶，并且斜坡被形成在台阶上。根据本实施例，在台阶上的高度差由台阶上的斜坡表面顺次地改变，使得密封部分的粘合层311可以被强制在内侧方向上顺利地移动。
而且，优选地，上压缩夹具100和/或下压缩夹具200可以将热与压力一起施加到密封部分。如前述中所描述，被施加到密封部分以密封袋状壳体300的热可以为密封部分的粘合层311带来移动性，并且当压力被施加时这可以强制密封部分的粘合层311容易地移动，使得粘合层311可以在密封部分的内侧处形成有较大的厚度。
而且，优选地，上压缩夹具100和/或下压缩夹具200可以在施加压力之前预热密封部分。如果在压力被施加之前预热密封部分，则当压力被施加时粘合层311变成被足够地熔化，并且因此当在向上和向下方向上将压力施加到密封部分时粘合层311被强制以适当的速率移向两侧。当粘合层311被强制以适当的速率移向两侧时，不超过必要地强制粘合层311移出密封部分，使得密封部分的粘合层311可以在内侧处形成有增大的厚度。因此，在这样的情况下，可以防止袋状壳体300的铝层312在密封部分的内侧处的暴露。
更加优选地，上压缩夹具100和/或下压缩夹具200可以通过预热密封部分并且一起施加热和压力来执行密封工艺。
根据本公开的另一方面，用于制造二次电池的设备可以包括用于密封袋状壳体的上述设备。除了用于密封袋状壳体的上述设备之外，用于制造二次电池的设备可以进一步包括用于注入电解质溶液的设备、用于切割袋状壳体的设备等等。
在下文中，将会参考图10描述根据本公开的用于密封袋状壳体的方法。
图10是示意性地图示根据本公开的示例性实施例的密封袋状壳体的方法的流程图。参考图10，用于密封袋状壳体的方法包括接纳电极组件的步骤(S110)和将压力施加到密封部分的步骤(S130)。
接纳电极组件的步骤(S110)是将电极组件接纳在袋状壳体的内部空间310中的步骤。在S110中，在电极组件被接纳在袋状壳体300的内部空间310中之后，可以进一步执行注入电解质溶液的步骤和对准袋状壳体300的密封部分以密封袋状壳体300的步骤。
将压力施加到密封部分的步骤(S130)是在向上和向下方向上将压力施加到被对准的袋状壳体300的密封部分的步骤。特别地，在本公开中，将压力施加到密封部分的步骤(S130)以不同的深度将压力施加到袋状壳体300的密封部分。即，将压力施加到密封部分的步骤(S130)在袋状壳体300的密封部分的内侧和外侧处以不同的深度将压力施加到袋状壳体300的密封部分，使得密封部分的粘合层311的内侧厚度和外侧厚度可以不同。
将压力施加到密封部分的步骤(S130)被优选地执行，使得在密封部分的外侧处的压力施加深度大于在密封部分的内侧处的压力施加深度。通过以比密封部分的内侧大的深度将压力施加到密封部分的外侧，可以在密封部分的内侧处形成厚的粘合层311，并且由此可以确保绝缘可靠性。
为了以比密封部分的内侧大的深度将压力施加到密封部分的外侧，在压力施加步骤(S130)中可以使用用于密封袋状壳体的上述设备。
例如，为了对于密封部分实现不同的压力施加深度，可以以倾斜方式执行压力施加步骤(S130)。可以通过以预定的角度使上压缩夹具100和下压缩夹具200倾斜来执行倾斜。根据本实施例，通过倾斜，对于密封部分的在外侧端和内侧端处的压力施加深度可以不同。
更加优选地，通过使上压缩夹具100倾斜执行倾斜使得外侧部分比内侧部分低并且通过使下压缩夹具200倾斜执行倾斜使得外侧部分比内侧部分高，以在密封部分的内侧处形成厚粘合层311。
作为另一示例，可以使用具有台阶(在该台阶中台阶在外侧端(o)处比在内侧端(i)处高)的上压缩夹具100和/或下压缩夹具200执行压力施加步骤(S130)。
优选地，将压力施加到密封部分的步骤(S130)可以将热与压力一起施加到袋状壳体300的密封部分。
而且，优选地，如在图10中所示，预热密封部分的步骤(S120)可以进一步被包括在接纳电极组件的步骤(S110)和将压力施加到密封部分的步骤(S130)之间。预热密封部分的步骤(S120)是在施加压力之前预热密封部分的步骤。预热密封部分的步骤(S120)，通过在施加压力之前预热密封部分来熔化粘合层311并且增加移动性。当在粘合层311被充分地熔化的状态下在向上和向下方向上将压力施加到密封部分时，粘合层311被强制以适当的速率移向两侧。因此，不超过必要地强制粘合层311移出密封部分，使得可以在密封部分的内侧处确保厚粘合层311。
更加优选地，在压力施加步骤(S130)之前可以进一步包括预热步骤(S120)，并且压力施加步骤(S130)可以将热与压力一起施加到密封部分。
在分开的实施例的背景下在本说明书中描述的确定的特征也能够在单个实施例中被组合实现。相反地，在单个实施例的背景下描述的各种特征也能够在多个实施例中单独地实现或者在任何适当的子组合中实现。
在本公开的以上详细描述或者附图中，诸如上、下、内以及外的术语被用于相对地区分一个元件与另一个元件，并且它们仅是用于提高描述效率的工具性概念并且不应被解释为被用于通过绝对标准来确定物理位置、背景等等的概念。
在上文中，已经详细地描述本公开。然而，应理解的是，在指示本公开的优选实施例时，仅通过举例说明给出详细描述和具体示例，这是因为对本领域的技术人员来说，在本公开的精神和范围内的各种变化和修改将会变得显而易见。

Claims (17)

1.一种用于密封袋型二次电池的袋状壳体的设备，所述设备包括：
上压缩夹具，所述上压缩夹具在向下方向上将压力施加到所述袋状壳体的密封部分；和
下压缩夹具，所述下压缩夹具在向上方向上将压力施加到所述袋状壳体的所述密封部分，
其中，所述上压缩夹具和所述下压缩夹具中的至少一个在内侧端和外侧端处以不同的深度将压力施加到所述袋状壳体。
2.根据权利要求1所述的设备，其中，所述上压缩夹具和所述下压缩夹具中的至少一个倾斜且与所述袋状壳体接触。
3.根据权利要求2所述的设备，其中，所述倾斜被以如下方式执行，即：在所述上压缩夹具和所述下压缩夹具中的至少一个的外侧端处向所述袋状壳体施加更高的压力。
4.根据权利要求1所述的设备，其中，所述上压缩夹具和所述下压缩夹具中的至少一个具有台阶，所述台阶被形成在作用到所述袋状壳体上的压力施加表面上。
5.根据权利要求4所述的设备，其中，所述台阶被形成为在外侧端处比在内侧端处高。
6.根据权利要求4所述的设备，其中，所述台阶的数目是至少两个。
7.根据权利要求1所述的设备，其中，所述上压缩夹具和所述下压缩夹具中的至少一个具有在作用到所述袋状壳体上的压力施加表面上的斜坡。
8.根据权利要求7所述的设备，其中，所述斜坡形成为在所述上压缩夹具和所述下压缩夹具中的至少一个的外侧端处比在内侧端处更高。
9.根据权利要求1所述的设备，其中，所述上压缩夹具和所述下压缩夹具中的至少一个将热与压力一起施加到所述袋状壳体的所述密封部分。
10.根据权利要求1所述的设备，其中，在施加所述压力之前，所述上压缩夹具和所述下压缩夹具中的至少一个对所述袋状壳体的所述密封部分进行预热。
11.一种用于制造二次电池的设备，包括根据权利要求1至10中的任一项所述的用于密封袋状壳体的设备。
12.一种用于密封袋型二次电池的袋状壳体的方法，所述方法包括：
将电极组件接纳在所述袋状壳体的内部空间中；和
在向上和向下方向上将压力施加到所述袋状壳体的密封部分，
其中，所述压力的施加包括以不同的深度将压力施加到所述袋状壳体。
13.根据权利要求12所述的方法，其中，所述压力的施加包括以在外侧处比在内侧处更大的深度施加所述压力。
14.根据权利要求13所述的方法，其中，所述压力的施加包括：将所述压力施加到所述袋状壳体的上压缩夹具和下压缩夹具中的至少一个倾斜，并且与所述袋状壳体接触。
15.根据权利要求14所述的方法，其中，所述倾斜被以如下方式执行，即：在所述上压缩夹具和所述下压缩夹具中的至少一个的外侧端处向所述袋状壳体施加更高的压力。
16.根据权利要求12所述的方法，其中，所述压力的施加包括将热与压力一起施加到所述袋状壳体的所述密封部分。
17.根据权利要求12所述的方法，进一步包括：
在施加所述压力之前对所述袋状壳体的所述密封部分进行预热。
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CN104584259B (zh) 2017-03-15
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