CN116529937A - 包括形成有压花图案的密封部的电池单体和用于制造电池单体的密封块 - Google Patents

包括形成有压花图案的密封部的电池单体和用于制造电池单体的密封块 Download PDF

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Publication number
CN116529937A
CN116529937A CN202280007790.9A CN202280007790A CN116529937A CN 116529937 A CN116529937 A CN 116529937A CN 202280007790 A CN202280007790 A CN 202280007790A CN 116529937 A CN116529937 A CN 116529937A
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China
Prior art keywords
battery cell
sealing
sealing part
embossed pattern
pouch
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Pending
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CN202280007790.9A
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English (en)
Inventor
姜炅秀
李在浩
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Lg Energy Solution
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Lg Energy Solution
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Publication of CN116529937A publication Critical patent/CN116529937A/zh
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/022—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing characterised by the disposition or the configuration, e.g. dimensions, of the embossments or the shaping tools therefor
    • 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
    • B29C66/13—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
    • B29C66/40—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
    • 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
    • B29C66/7234—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 barrier layer
    • 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
    • B29C66/81427—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 ridge, e.g. for making a weakening line; comprising a single tooth
    • 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
    • B29C66/81427—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 ridge, e.g. for making a weakening line; comprising a single tooth
    • B29C66/81429—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 ridge, e.g. for making a weakening line; comprising a single tooth comprising a single tooth
    • 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
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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
    • B29C66/81433—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 being toothed, i.e. comprising several teeth or pins, or being patterned
    • 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
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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
    • B29C66/81433—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 being toothed, i.e. comprising several teeth or pins, or being patterned
    • B29C66/81435—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 being toothed, i.e. comprising several teeth or pins, or being patterned comprising several parallel ridges, e.g. for crimping
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C66/80—General aspects of machine operations or constructions and parts thereof
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    • H—ELECTRICITY
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    • H01M10/04—Construction or manufacture in general
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    • H—ELECTRICITY
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    • H—ELECTRICITY
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    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract

本发明涉及一种包括被配置为在内部收纳电极组件的软包型电池壳体的电池单体，其中，所述软包型电池壳体在围绕电极组件容纳部的其外周处设置有密封部，并且在所有方向的密封部上形成有压花图案，由此，可以在不增加单独的电池单体制造工艺的情况下增加软包型电池单体的密封力。

Description

包括形成有压花图案的密封部的电池单体和用于制造电池单 体的密封块
技术领域
本申请要求于2021年10月18日提交的韩国专利申请No.2021-0138266的优先权的权益，该专利申请的公开内容通过引用全部并入本说明书中。
本发明涉及一种包括形成有压花图案的密封部的电池单体和用于制造该电池单体的密封块。更具体地，本发明涉及一种包括形成有压花图案的密封部的电池单体和用于制造该电池单体的密封块，其中所述压花图案被配置为防止软包型电池单体的密封部容易排气。
背景技术
能够充电和放电的锂二次电池已经广泛用作无线移动设备或佩戴在身体上的可穿戴设备的能源，并且还用作作为引起空气污染的现有汽油和柴油车辆的替代物的电动车辆和混合动力车辆的能源。
根据电池壳体的材料和形状，锂二次电池可以分为具有安装在金属罐中的电极组件的圆柱形电池单体、具有安装在金属罐中的电池组件的棱柱形电池单体、或具有安装在由层叠片制成的电池壳体中的电极组件的软包型电池单体。软包型电池单体具有容易变形且能量密度高的优点。
为了密封软包型电池单体，使用利用高温密封块来挤压电池壳体的外周以形成密封部的方法。然而，如果使用这种密封方法，当软包型电池单体的内压增加时，容易发生软包型电池单体的排气。
因此，已经设计出改善软包型电池单体的密封性能的方法。
专利文献1公开了一种蓄电装置，其配置为使得在由包括依次堆叠的金属箔层、防腐处理层和密封剂层的蓄电装置包覆构件(sheathing member)形成的密封容器中，密封剂层彼此接触的边缘部分通过热密封被密封，并且在边缘部分处形成薄的凹部。
在专利文献1中，在通过热密封形成的密封部处形成薄的部分，由此，边缘部分容易弯曲。
专利文献2公开了一种包括包覆膜的膜涂覆电池，所述被配置为使得至少热熔性树脂层和金属薄膜层被堆叠，在热熔性树脂层面向内侧的状态下电池元件被包围，并且外周的接合部被热熔接以密封电池元件，其中，在接合部处形成至少一个弯曲部，并且弯曲部的厚度小于弯曲部周围的接合部的厚度。
在专利文献2中，在包覆膜的接合部处形成具有相对较小的厚度的弯曲部，由此，防止由于膜在接合部的内侧和外侧的延伸差异而在弯曲部处形成裂纹。
专利文献3公开了一种用于进行预密封的密封装置，按顺序地进行预密封和主密封以便密封软包型电池壳体，其中，所述密封装置包括被配置为加热和挤压用于电池壳体的片材构件的外周的一个表面和另一表面以形成预密封部和一对密封块的加压部(press)，每个密封块包括被配置为将片材构件固定的固定部，在加压部上向外突出地形成有密封突起，并且当在垂直截面中观察时，密封突起的外侧端部为圆形。
在专利文献3中，在主密封之前进行预密封，由此，在电池单体的外表面上褶皱的形成减少。
然而，上述专利文献没有提出能够容易地提供能够增加软包型电池单体的密封力的结构的技术，因此，需要开发这种技术。
(现有技术文献)
(专利文献1)日本专利申请公开No.2013-157286(2013.08.15)
(专利文献2)韩国专利申请公开No.2006-7007430(2006.04.18)
(专利文献3)韩国专利申请公开No.2018-0028714(2018.03.19)
发明内容
技术问题
鉴于上述问题而做出本发明，本发明的一个目的是提供一种包括形成有压花图案的密封部的电池单体，使得可以使用简单的方法应用其中软包型电池单体的密封部的密封力增加的结构。
技术方案
为了实现上述目的，根据本发明的电池单体包括被配置为在内部收纳电极组件的软包型电池壳体，其中，所述软包型电池壳体在围绕电极组件容纳部的其外周处设置有密封部，并且在所有方向的所述密封部上形成有压花图案。
所述压花图案可以形成为使得当从密封部上方观察时的浮雕在从密封部下方观察时为凹雕(intaglios)，并且使得当从密封部上方观察时的凹雕在从密封部下方观察时为浮雕(reliefs)。
所述压花图案可以形成为使得当从密封部的上方观察时浮雕和凹雕交替地重复。
所述压花图案可以以规定尺寸和规定间隔形成。
在电极引线突出的方向的密封部上形成的压花图案的间隔可以小于在电极引线不突出的方向上在密封部上形成的压花图案的间隔。
所述压花图案的垂直截面可以是多边形、半圆形或半椭圆形。
本发明提供一种用于制造电池单体的密封块。具体地，所述密封块包括设置在软包型电池单体的密封部上方的上部密封块和设置在软包型电池单体的密封部下方的下部密封块，其中，所述上部密封块和所述下部密封块设置有凹部和凸部，所述凹部和所述凸部被配置为在所述上部密封块和所述下部密封块彼此对应的位置处彼此接合。
所述凸部可以朝向所述软包型电池单体的密封部突出。
或者，所述凸部可以被配置为使得朝向软包型电池单体的密封部向上突出的形状和朝向软包型电池单体的密封部向下突出的形状交替地重复布置。
本发明提供一种包括电池单体作为单元电池的电池模块。
此外，本发明可以提供上述解决手段的各种组合。
有益效果
从上面描述显而易见的是，根据本发明的电池单体被配置为使得在整个密封部上形成压花图案，由此，密封部的总表面积增加。因此，可以增大上部壳体与下部壳体之间的接触面积，从而可以增加电池单体的密封力。
因此，即使当软包型电池单体变形时，也可以防止密封部开放，并且即使当电池单体的内压增加时，也可以抑制电池单体爆炸。
此外，在常规电池单体制造过程中，可以在密封部上形成压花图案，因此，不需要增设生产设施。
附图说明
图1是根据第一实施例的电池单体的透视图。
图2是根据第二实施例的电池单体的透视图。
图3是电池单体的密封部的垂直剖视图。
图4是根据第三实施例的密封块的垂直剖视图。
图5是根据第四实施例的密封块的垂直剖视图。
图6是示出当对实验例1施加0.01MPa的内压时最大变形量结构模拟的结果的图。
图7是示出当对实验例2施加0.01MPa的内压时最大变形量结构模拟的结果的图。
图8是示出当对实验例1施加0.01MPa的内压时最大应力结构模拟的结果的图。
图9是示出当对实验例2施加0.01MPa的内压时最大应力结构模拟的结果的图。
图10是示出当对实验例1施加0.1MPa的内压时最大变形量结构模拟的结果的图。
图11是示出当对实验例2施加0.1MPa的内压时最大变形量结构模拟的结果的图。
图12是示出当对实验例1施加0.1MPa的内压时最大应力结构模拟的结果的图。
图13是示出当对实验例2施加0.1MPa的内压时最大应力结构模拟的结果的图。
具体实施方式
现在，将参照附图详细描述本发明的优选实施例，使得本发明所属领域的普通技术人员可以容易地实施本发明的优选实施例。然而，在详细描述本发明的优选实施例的工作原理时，当本文中包含的已知功能和配置会模糊本发明的主题时，将省略其详细描述。
另外，在整个附图中，将使用相同的附图标记来指代执行相似功能或操作的部件。在整个说明书中，在一个部件被称为与另一部件连接的情况下，该一个部件不仅可以与其它部件直接连接，而且该一个部件可以通过又一部件与其它部件间接连接。此外，除非另外说明，否则包括特定要素不是指排除其它要素，而是指还可以包括这些要素。
另外，除非特别限制，否则通过限定或添加来体现要素的描述可以应用于所有发明，并且不限制具体发明。
另外，在本发明的说明书和本申请的权利要求书中，除非另外说明，否则单数形式旨在包括复数形式。
另外，在本发明的说明书和本申请的权利要求书中，除非另外说明，否则“或”包括“和”。因此，“包括A或B”是指三种情况，即，包括A的情况、包括B的情况以及包括A和B的情况。
将参照附图详细描述本发明的实施例。
图1是根据第一实施例的电池单体的透视图。
电池单体100是软包型电池单体，该软包型电池单体包括由层压片材制成的软包型电池壳体110。软包型电池壳体110包括上部壳体111和位于上部壳体111下方的下部壳体112，上部壳体111具有被配置为收纳在其中形成的电极组件的电极组件容纳部114。
电池壳体可以由层压片制成，该层压片被配置为被堆叠外部树脂层、空气水分阻挡金属层和热熔性内部树脂层。
要求外部树脂层对外部环境表现出优异的耐受性，因此，需要大于预定的拉伸强度和耐候性。例如，外部树脂层可以包括聚萘二甲酸乙二醇酯(PEN)、聚对苯二甲酸乙二醇酯酯(PET)或取向尼龙。
金属层可以由铝(A1)或铝合金制成，以便除了防止引入诸如气体和水分的异物或防止电解液泄漏的功能之外，还表现出改善电池壳体的强度的功能。
可以使用表现出热熔性、对电解液具有低吸湿性并且不会由于电解液而膨胀或侵蚀的聚合物树脂作为内部树脂层。例如，内部树脂层可以由流延聚丙烯(CPP)膜制成。
上部壳体111和下部壳体112在它们的围绕电极组件容纳部的外周处彼此接触。当外周被加热和加压时，上部壳体的内部树脂层和下部壳体的内部树脂层彼此熔化并结合以形成密封部115。
在电池单体100中，上部壳体111和下部壳体112彼此连接，并且密封部115形成在除了弯曲部之外的三个方向外周处。
即，形成在三个方向外周处的密封部包括位于电池单体的相对两端的总宽度方向(W)密封部、以及总长度方向(H)密封部，并且在所有密封部上形成有压花图案116。
压花图案116可以形成在所有密封部上，以规定尺寸和规定间隔设置，使得所有的密封部具有相同的密封力。
或者，由于内压在总长度方向(H)密封部的总长度方向中央部最大程度地增加，因此，可以在总长度方向中央部上以较小间隔形成压花图案。
或者，电极引线120在总宽度方向(W)密封部处从电池壳体向外延伸，并且电极引线120从其突出的部分处的密封力进一步减小。因此，为了防止电极引线120突出的部分处的密封力减小，在电极引线120突出的方向上的密封部上形成的压花图案可以以比在电极引线120不突出的方向上的密封部上形成的压花图案更小的间隔形成。这种构造也可以同样应用于单向电池单体，该单向电池单体被配置为使得电极引线从一个方向密封部突出。
当在平面中观察时，在电池单体100上形成的压花图案通常具有圆柱形和圆形。然而，对压花图案的形状没有特别限制，只要可以增加上部壳体与下部壳体之间的粘合面积即可。例如，压花图案的垂直截面可以是多边形、半圆形或半椭圆形。
在本发明中，形成压花图案以便增加密封部上的电池壳体的粘合面积。压花图案可以形成为使得当从密封部上方观察时的浮雕部在从密封部下方观察时为凹雕部，并且使得当从密封部上方观察时的凹雕部在从密封部下方观察时为浮雕部。
图2是根据第二实施例的电池单体的透视图。
参照图2，为了便于描述，将构成电池单体200的软包型电池壳体210的上部壳体211和下部壳体212示出为彼此间隔开；然而，上部壳体211和下部壳体212通过热熔合而彼此紧密接触。
电池单体200被配置为具有如下结构，其中在上部壳体211和下部壳体212的每一个中形成电极组件容纳部214，以便收纳具有向相反方向突出的电极引线220的双向电极组件，这可以更适合于制造高容量电池单体。
电池单体200在压花图案的形状上与电池单体100不同。具体地，当在平面中观察时，压花图案216通常具有四棱柱形状和四边形形状。此外，压花图案216形成直至密封部的端部。因此，在密封部215上的在上部壳体211与下部壳体212之间的粘合面积可以更宽，由此，可以进一步提高密封力。
同时，电池单体200被配置为使得在总宽度方向(W)密封部上形成的压花图案和在总长度方向(H)密封部上形成的压花图案在尺寸和间隔上彼此不同。因此，可以自由地设置压花图案的尺寸和间隔，以确保期望的密封力。
电池单体100的描述可以等同地应用于电池单体200的其它部分，因此，将省略其详细描述。
图3是电池单体的密封部的垂直剖视图。
参照图3，示出了三种类型的压花图案。为了便于理解，将上部壳体211和下部壳体212示出为彼此间隔开；然而，这些壳体没有彼此隔开而彼此紧密接触以形成密封部。
图3的(a)中所示的压花图案被配置为使得当在垂直截面中观察时的多边形形状以规定尺寸和规定间隔形成，使得当从密封部上方观察时的浮雕部在从密封部下方观察时为凹雕部，并且使得当从密封部上方观察时的凹雕部在从密封部下方观察时为浮雕部。
图3的(b)中所示的压花图案被配置为使得当在垂直截面中观察时的多边形形状以规定尺寸和规定间隔形成，使得当从密封部上方观察时浮雕和凹雕交替地重复，并且使得当从密封部下方观察时在对应于浮雕和凹雕的位置处凹雕和浮雕交替地重复。
图3的(c)中所示的压花图案被配置为使得在垂直截面中观察时的半圆形形状以规定尺寸和规定间隔形成，使得当从密封部上方观察时半圆形状为浮雕，并且使得当从密封部下方观察时半圆形状为凹雕。
根据本发明的压花图案不限于图3中所示的形状，并且压花图案可以在具有各种形状的同时以各种间隔形成。
图4是根据第三实施例的密封块的垂直剖视图。
参照图4，根据第三实施例的密封块适合于形成图3的(a)中所示的压花图案。根据第三实施例的密封块包括：设置在软包型电池单体的密封部上方的上部密封块310；以及设置在软包型电池单体的密封部下方的下部密封块320。
上部密封块310和下部密封块320被配置为在上部密封块和下部密封块彼此对应的位置处彼此接合。基于密封表面301形成凹陷的凹部340，并且基于密封表面302形成凸出的凸部330。
当软包型电池单体的密封部设置在上部密封块310与下部密封块320之间并且密封部被加压和加热时，形成图3的(a)中所示的压花图案。凸部330可以朝向软包型电池单体的密封部突出。
图5是根据第四实施例的密封块的垂直剖视图。
参照图5，根据第四实施例的密封块适合于形成图3的(b)中所示的压花图案。根据第四实施例的密封块包括：设置在软包型电池单体的密封部上方的上部密封块410；以及设置在软包型电池单体的密封部下方的下部密封块420。
上部密封块410和下部密封块420被配置为在上部密封块和下部密封块彼此对应的位置处彼此接合。基于密封表面401形成凹陷的凹部440，并且基于密封表面401形成凸出的凸部430。
凸部430被配置为使得朝向软包型电池单体的密封部向上突出的部分和朝向软包型电池单体的密封部向下突出的部分交替地重复布置，并且在彼此面对的密封块中形成凹部440以便与凸部430接合。
在根据本发明的电池单体中，密封部的密封力增加。因此，在包括所述电池单体作为单元电池的电池模块中，即使在较大的内压下，所述电池单体也不会排气。因此，可以提高电池模块的安全性。
下文中，将参照示例描述本发明。提供这些示例仅为了更容易理解本发明，并且不应理解为限制本发明的范围。
<实验例1>
制备软包型电池单体，并且密封该软包型电池单体的外周，使得在整个密封部上形成压花图案。
<实验例2>
制备软包型电池单体，并且密封该软包型电池单体的外周，使得密封部是平坦的。
<最大变形量和最大应力测量1>
根据实验例1和实验例2制造的各个电池单体在被施加0.01MPa的内压的同时测量最大变形量和最大应力。实验例1的最大变形量结构模拟的结果示于图6中，实验例2的最大变形量结构模拟的结果示于图7中。此外，实验例1的最大应力结构模拟的结果示于图8中，实验例2的最大应力结构模拟的结果示于图9中。
使用Meshfree执行结构模拟，Meshfree是由Midas IT Co.，Ltd.开发的CAE工具。使用作为CAD程序的SolidWorks实现三维形状，然后使用Meshfree对各个形状执行结构模拟。
参照图6和图7，实验例1的最大变形量约为0.03mm，实验例2的最大变形量约为0.04mm。
参照图8和图9，实验例1的最大应力约为8.8N/mm2，实验例2的最大应力约为11.3N/mm2。
其中在整个密封部上形成压花图案的实验例1表现出比其中密封部是平坦的实验例2的最大变形量更小的最大变形量，因此，可以看出，在其整个密封部上形成有压花图案的软包型电池单体具有对于内压的增加而变形量小的更坚硬的结构。
此外，当被施加相同的内压时，实验例1的最大应力被测量为小于实验例2的最大应力。因此，可以看出，在其整个密封部上形成有压花图案的软包型电池单体能够承受更大的内压。
从上述结果可以看出，当在软包型电池单体的整个密封部上形成压花图案时，密封力增加。
<最大变形量和最大应力测量2>
根据实验例1和实验例2制造的各个电池单体在被施加0.1MPa的内压的同时测量最大变形量和最大应力。实验例1的最大变形量结构模拟的结果示于图10中，实验例2的最大变形量结构模拟的结果示于图11中。此外，实验例1的最大应力结构模拟的结果示于图12中，实验例2的最大应力结构模拟的结果示于图13中。
使用与最大变形量和最大应力测量1中相同的方法执行结构模拟。
参照图10至图13，实验例1的最大变形量约为0.25mm，实验例2的最大变形量约为0.37mm。实验例1的最大应力约为84N/mm2，实验例2的最大应力约为111N/mm2。
其中在整个密封部上形成有压花图案的实验例1表现出比其中密封部是平坦的实验例2的最大变形量和最大应力更小的最大变形量和最大应力。
因此，当在软包型电池单体的整个密封部上形成压花图案时，软包型电池单体可以具有更硬的结构，并且即使当内压更大地增加时，也可以保持密封力。
本发明所属领域的技术人员将认识到，基于上述描述，在本发明的范畴内，可以进行各种应用和修改。
(附图标记的描述)
100、200：电池单体
110、210：软包型电池壳体
111、211：上部壳体
112、212：下部壳体
114、214：电极组件容纳部
115、215：密封部
116、216：压花图案
120、220：电极引线
301、401：密封表面
310、410：上部密封块
320、420：下部密封块
330、430：凸部
340、440：凹部
H：总长度方向
W：总宽度方向

Claims (10)

1.一种电池单体，包括被配置为在内部收纳电极组件的软包型电池壳体，其中，
所述软包型电池壳体在围绕电极组件容纳部的外周处设置有密封部，并且
在所有方向的所述密封部上形成有压花图案。
2.根据权利要求1所述的电池单体，其中，所述压花图案形成为使得当从所述密封部上方观察时的浮雕在从所述密封部下方观察时为凹雕，并且使得当从所述密封部上方观察时的凹雕在从所述密封部下方观察时为浮雕。
3.根据权利要求2所述的电池单体，其中，所述压花图案形成为使得当从所述密封部上方观察时所述浮雕和所述凹雕交替地重复。
4.根据权利要求1所述的电池单体，其中，所述压花图案以规定尺寸和规定间隔形成。
5.根据权利要求1所述的电池单体，其中，在电极引线突出的方向的密封部上形成的压花图案的间隔小于在电极引线不突出的方向的密封部上形成的压花图案的间隔。
6.根据权利要求1所述的电池单体，其中，所述压花图案的垂直截面是多边形、半圆形或半椭圆形。
7.一种用于制造根据权利要求1至6中任一项所述的电池单体的密封块，所述密封块包括：
设置在软包型电池单体的密封部上方的上部密封块；以及
设置在所述软包型电池单体的密封部下方的下部密封块，
其中，所述上部密封块和所述下部密封块设置有凹部和凸部，所述凹部和所述凸部被配置为在所述上部密封块和所述下部密封块彼此对应的位置处彼此接合。
8.根据权利要求7所述的密封块，其中，所述凸部朝向所述软包型电池单体的所述密封部突出。
9.根据权利要求7所述的密封块，其中，所述凸部被配置为使得朝向所述软包型电池单体的密封部向上突出的形状和朝向所述软包型电池单体的密封部向下突出的形状交替地重复布置。
10.一种电池模块，包括根据权利要求1至6中任一项所述的电池单体作为单元电池。
CN202280007790.9A 2021-10-18 2022-10-18 包括形成有压花图案的密封部的电池单体和用于制造电池单体的密封块 Pending CN116529937A (zh)

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