WO2017034380A1 - Secondary battery sealing device - Google Patents

Secondary battery sealing device Download PDF

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Publication number
WO2017034380A1
WO2017034380A1 PCT/KR2016/009550 KR2016009550W WO2017034380A1 WO 2017034380 A1 WO2017034380 A1 WO 2017034380A1 KR 2016009550 W KR2016009550 W KR 2016009550W WO 2017034380 A1 WO2017034380 A1 WO 2017034380A1
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WO
WIPO (PCT)
Prior art keywords
sealing
cooling
sealing surface
secondary battery
sealing device
Prior art date
Application number
PCT/KR2016/009550
Other languages
French (fr)
Korean (ko)
Inventor
김상훈
최용수
정상석
황원필
김초롱
김용
Original Assignee
주식회사 엘지화학
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from KR1020160108595A external-priority patent/KR20170026230A/en
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to CN201680022215.0A priority Critical patent/CN108012570B/en
Priority to US15/563,396 priority patent/US10777840B2/en
Priority to PL16839668T priority patent/PL3264488T3/en
Priority to EP16839668.7A priority patent/EP3264488B8/en
Priority to JP2017556154A priority patent/JP6535388B2/en
Publication of WO2017034380A1 publication Critical patent/WO2017034380A1/en

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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 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
    • 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 relates to a sealing device for a secondary battery, and more particularly, to a sealing device for a secondary battery, which prevents the resin layer provided inside the sealing surface from flowing out to the outside of the sealing surface during thermal sealing of the pouch. will be.
  • a secondary battery refers to a battery that can be charged and discharged, unlike a primary battery that cannot be charged.
  • Such a secondary battery is widely used in advanced electronic devices such as phones, notebook computers, and camcorders.
  • the secondary battery according to the prior art includes an electrode assembly, a pouch in which the electrode assembly is accommodated, and the electrode assembly is provided with a positive electrode, a separator, and a negative electrode, and the pouch seals an accommodating part in which the electrode assembly is accommodated and a main surface of the accommodating part. It is provided with the sealing surface.
  • the pouch is formed of an inner resin layer, a metal layer, and an outer resin layer.
  • the inner and outer resin layers protect the metal layer from the outside, and the metal layer increases insulation.
  • the secondary battery according to the related art is heat-sealed to seal the sealing surface of the pouch in a state in which the electrode assembly is accommodated in the accommodating portion of the pouch, wherein the inner resin layer of the sealing surface melts together to form the sealing surface.
  • the inner resin layer of the sealing surface melts together to form the sealing surface.
  • the present invention provides a sealing device for a secondary battery that prevents the inner resin layer provided on the sealing surface to flow out to the outside of the pouch when heat sealing the sealing surface of the pouch.
  • Sealing device for a secondary battery for achieving the above object is a sealing member for sealing by sealing the heat sealing surface of the pouch containing the electrode assembly; And it may include a cooling member for cooling the sealing surface.
  • the sealing member may seal the upper and lower surfaces of the sealing surface by heat-sealing at the same time.
  • the cooling member may simultaneously cool the upper and lower surfaces of the sealing surface.
  • the cooling member may be provided as an inner cooling unit and an outer cooling unit for cooling the inner end and the outer end of the sealing surface with the sealing member interposed therebetween.
  • the inner cooling unit and the outer cooling unit may have different cooling temperatures.
  • the inner cooling unit provided at the inner end of the sealing surface may have a higher cooling temperature than the outer cooling unit.
  • the inner cooling unit and the outer cooling unit may have different cooling areas.
  • the inner cooling unit provided at the inner end of the sealing surface may have a larger cooling area than the outer cooling unit.
  • the cooling member and the sealing member may be disposed in close contact with each other to secure an insulation and deformation space between the cooling member and the sealing member.
  • An insulation may be included between the cooling member and the sealing member.
  • the present invention has the following effects.
  • the sealing surface of the pouch is heat-sealed and sealed, and at the same time, the inner resin layer of the sealing surface is prevented from being drawn out into the pouch. It is possible to prevent the electrode assembly from contacting.
  • the sealing member may be provided in pairs to increase the sealing force by heat-sealing both surfaces of the sealing surface at the same time.
  • the cooling member may be provided in pairs to simultaneously cool both sides of the sealing surface to significantly prevent melting of the inner resin layer.
  • FIG. 1 is a view showing a sealing device of a secondary battery according to the present invention.
  • FIG. 2 is an enlarged view of a portion A shown in FIG. 1; FIG.
  • Figure 3 is an enlarged cross-sectional view showing a sealing device of a secondary battery according to the present invention.
  • FIG. 4 is a cross-sectional view showing another embodiment of a sealing apparatus according to the present invention.
  • FIG. 5 is a cross-sectional view showing yet another embodiment of a sealing apparatus according to the present invention.
  • the secondary battery includes an electrode assembly 10 and a pouch 20 formed of an upper case and a lower case that are coupled to each other while receiving the electrode assembly 10.
  • the pouch 20 is coupled to the upper case and the lower case, the receiving portion 21 is accommodated in the electrode assembly 10, the sealing surface 22 is provided on the rim surface of the receiving portion 21 and heat-sealed seal 22 Is prepared.
  • the pouch 20 has a laminated structure of an inner resin layer 20a, a metal layer 20b, and an outer resin layer 20c for insulation and safety.
  • the secondary battery seals the sealing surface 22 by heat-sealing the electrode assembly 10 in the accommodating portion 21 of the pouch 20. At this time, the secondary battery sealing apparatus 100 according to the present invention is used.
  • the secondary battery sealing apparatus 100 as shown in Figure 2, the sealing member 110 for sealing by heat sealing the sealing surface 22 of the pouch 20, the electrode assembly 10 is accommodated Include.
  • the secondary battery sealing apparatus 100 uses the sealing member 110 heated at a high temperature to pressurize the sealing surface 22 of the pouch 20 and to heat seal the same.
  • the sealing member 110 is composed of a pair, heat-sealed while pressing the upper and lower surfaces of the sealing surface 22 at the same time, thereby increasing the sealing force of the sealing surface 22.
  • the secondary battery sealing apparatus 100 when the heat sealing the sealing surface 22 using the sealing member 110 by the heat source of the sealing member 110 internal water inside the sealing surface 22 The ground layer 20a is melted, and the molten inner resin layer 20a flows out of the sealing surface 22 to draw out.
  • the electrode assembly 10 when the inner resin layer 20a is drawn out to the accommodating portion 21, the electrode assembly 10 is damaged as the inner resin layer 20a and the electrode assembly 10 come into contact with each other.
  • the sealing device 100 of the secondary battery according to the present invention is cooled to cool the inner resin layer 20a melted by the sealing member 110 so as not to flow out of the sealing surface 22.
  • the member 120 is provided. That is, the cooling member 120 cools the inner end (right end of the sealing surface as seen in FIG. 3) and the outer end (left end of the sealing surface as seen in FIG. 3) of the sealing surface 22, respectively.
  • the cooling member 120 includes an inner cooling part 121 and an outer cooling part 122 cooling the inner and outer ends of the sealing surface 22 with the sealing member 110 interposed therebetween. do. That is, the sealing member 110 melts and seals the inner resin layer 20a inside the sealing surface 22, while the inner cooling part 121 and the outer cooling part 122 are formed at the inner end of the sealing surface 22. The outer end is cooled to prevent the molten inner resin layer 20a from being drawn out to the inner and outer ends of the sealing surface 22. In particular, the cooling member 120 can prevent both the outer side and the receiving portion of the sealing surface 22 to be drawn out.
  • the cooling member 120 is formed in a pair to cool the upper and lower surfaces of the sealing surface 22 at the same time, thereby cooling the sealing surface 22 more effectively.
  • the inner cooling unit 121 and the outer cooling unit 122 in the cooling member 120 has a different cooling temperature. That is, the inner end and the outer end of the sealing surface 22 may have different thicknesses, and differently control the cooling temperatures of the inner cooling unit 121 and the outer cooling unit 122 according to the thickness difference between the inner end and the outer end. Thus, the inner resin layer 20a inside the sealing surface 22 can be cooled more effectively.
  • the inner cooling part 121 provided at the inner end of the sealing surface 22 has a higher cooling temperature than the outer cooling part 122 provided at the outer end of the sealing surface 22, thereby By cooling the inner resin layer 20a positioned at the inner end portion more effectively, it is possible to prevent the inner resin layer 20a from being drawn out toward the receiving portion.
  • the sealing surface 22 has a form in which the thickness gradually decreases from the inner end to the outer end, whereby the cooling temperature of the inner cooling unit 121 cooling the inner end of the sealing surface 22 is a sealing surface ( It is possible to increase the cooling efficiency by setting higher than the cooling temperature of the outer cooling unit 122 for cooling the outer end of 22).
  • the inner cooling unit 121 provided at the inner end of the sealing surface 22 has a larger cooling area than the outer cooling unit 122. That is, since the electrode assembly is damaged when the inner resin layer 20a is drawn out to the inner end of the sealing surface 22, the cooling area of the inner cooling unit 121 is changed to the cooling area of the outer cooling unit 122.
  • the inner resin layer 20a positioned at the inner end of the sealing surface 22 can be cooled more effectively, thereby preventing the inner resin layer 20a from being pulled out in the direction of the receiving portion.
  • the member 120 and the sealing member 110 are disposed not to be in close contact with each other, thereby securing an insulation and deformation space between the cooling member 120 and the sealing member 110.
  • heat or cold air exchange between the cooling member 120 and the sealing member 110 may be prevented by the heat insulation and deformation space.
  • the cooling temperature may be increased, but the heat transfer is prevented through the heat insulation and deformation space to prevent the cooling temperature of the cooling member 120 from lowering. Can be.
  • the sealing surface 22 including the inner resin layer 20a melted into the heat insulation and deformation space between the sealing member 110 and the cooling member 120 is pushed out, thereby causing the external drawing of the inner resin layer 20a to be withdrawn. Significantly can be prevented.
  • the heat insulating and deformation space between the cooling member 120 and the sealing member 110 may include a heat insulating material 130, the heat insulating material 130 is a cooling member 120 and the sealing It is possible to effectively block heat or cold air exchange of the member 110. Even if the sealing device 100 of the secondary battery according to the present invention having the above configuration is heat-sealed with the sealing surface of the pouch, the inner resin layer 20a inside the sealing surface ) Can be prevented from melting and flowing out, it is possible to prevent the inner resin layer (20a) and the electrode assembly 10 in contact with each other, and to prevent damage to the electrode assembly (20a).
  • the sealing member 110 seals the pouch during the sealing process and simultaneously includes the cooling member 120 including the inner cooling part 121 and the outer cooling part 122. ) Cools both ends of the sealing surface, and the resin at both ends of the sealing member 110 is cooled and solidified by the cooling member 120, so that the resin at the center may be prevented from flowing out even if the resin is melted at the center.

Abstract

The present invention relates to a secondary battery sealing device comprising: a sealing member for thermally bonding and sealing a sealing surface of a pouch in which an electrode assembly is accommodated; and a cooling member for cooling the sealing surface.

Description

이차전지의 실링장치Secondary battery sealing device
관련출원과의 상호인용Citation with Related Applications
본 출원은 2015년 08월 27일자 한국특허출원 제10-2015-0121184호 및 2016년 08월 25일자 한국특허출원 제10-2016-0108595호에 기초한 우선권의 이익을 주장하며, 해당 한국특허출원의 문헌에 개시된 모든 내용은 본 명세서의 일부로서 포함된다.This application claims the benefit of priority based on Korean Patent Application No. 10-2015-0121184 dated August 27, 2015 and Korean Patent Application No. 10-2016-0108595 dated August 25, 2016. All content disclosed in the literature is included as part of this specification.
기술분야Technical Field
본 발명은 이차전지의 실링장치에 관한 것으로서, 특히 파우치의 실링면 열융착시 상기 실링면의 내측에 구비된 수지층이 상기 실링면의 외부로 흘러서 인출되는 것을 방지한 이차전지의 실링장치에 관한 것이다.The present invention relates to a sealing device for a secondary battery, and more particularly, to a sealing device for a secondary battery, which prevents the resin layer provided inside the sealing surface from flowing out to the outside of the sealing surface during thermal sealing of the pouch. will be.
일반적으로 이차 전지(secondary battery)는 충전이 불가능한 일차 전지와는 달리 충전 및 방전이 가능한 전지를 말하며, 이러한 이차 전지는 폰, 노트북 컴퓨터 및 캠코더 등의 첨단 전자 기기 분야에서 널리 사용되고 있다.Generally, a secondary battery refers to a battery that can be charged and discharged, unlike a primary battery that cannot be charged. Such a secondary battery is widely used in advanced electronic devices such as phones, notebook computers, and camcorders.
종래기술에 따른 이차전지는 전극조립체, 전극조립체가 수용되는 파우치를 포함하며, 상기 전극조립체는 양극, 분리막 및 음극으로 마련되고, 상기 파우치는 전극조립체가 수용되는 수용부와 상기 수용부의 주면을 실링하는 실링면으로 마련된다. The secondary battery according to the prior art includes an electrode assembly, a pouch in which the electrode assembly is accommodated, and the electrode assembly is provided with a positive electrode, a separator, and a negative electrode, and the pouch seals an accommodating part in which the electrode assembly is accommodated and a main surface of the accommodating part. It is provided with the sealing surface.
그리고 상기 파우치는 내부수지층, 금속층, 외부수지층으로 마련되며, 상기 내부 및 외부 수지층은 외부로부터 금속층을 보호하고, 금속층은 절연성을 높인다.The pouch is formed of an inner resin layer, a metal layer, and an outer resin layer. The inner and outer resin layers protect the metal layer from the outside, and the metal layer increases insulation.
그러나 종래기술에 따른 이차전지는 상기 전극조립체를 상기 파우치의 수용부에 수용한 상태로 상기 파우치의 실링면을 열융착하여 실링하는데, 이때 상기 실링면의 내부수지층이 함께 용융되면서 상기 실링면의 외부로 흘러서 인출되는 문제가 있었다. 특히 용융된 내부수지층이 상기 수용부로 인출될 경우 전극조립체와 접촉되면서 전극조립체의 훼손이 발생하는 문제가 있었다.However, the secondary battery according to the related art is heat-sealed to seal the sealing surface of the pouch in a state in which the electrode assembly is accommodated in the accommodating portion of the pouch, wherein the inner resin layer of the sealing surface melts together to form the sealing surface. There was a problem flowing out to the outside. In particular, when the molten inner resin layer is drawn out to the receiving portion, there is a problem in that the electrode assembly is damaged while being in contact with the electrode assembly.
이와 같은 문제를 해결하기 위해 안출된 것으로, 본 발명은 파우치의 실링면을 열융착시 상기 실링면에 구비된 내측 수지층을 냉각하여 상기 파우치의 외부로 흘러서 인출되는 것을 방지한 이차전지의 실링장치를 제공하는데 있다.In order to solve the above problems, the present invention provides a sealing device for a secondary battery that prevents the inner resin layer provided on the sealing surface to flow out to the outside of the pouch when heat sealing the sealing surface of the pouch. To provide.
상기와 같은 목적을 달성하기 위한 본 발명에 따른 이차전지의 실링장치는 전극조립체가 수용된 파우치의 실링면을 열융착하여 실링하는 실링부재; 및 상기 실링면을 냉각하는 냉각부재를 포함할 수 있다.Sealing device for a secondary battery according to the present invention for achieving the above object is a sealing member for sealing by sealing the heat sealing surface of the pouch containing the electrode assembly; And it may include a cooling member for cooling the sealing surface.
상기 실링부재는 상기 실링면의 상면과 하면을 동시에 열융착하여 실링할 수 하는 있다.The sealing member may seal the upper and lower surfaces of the sealing surface by heat-sealing at the same time.
상기 냉각부재는 상기 실링면의 상면과 하면을 동시에 냉각할 수 있다.The cooling member may simultaneously cool the upper and lower surfaces of the sealing surface.
상기 냉각부재는 상기 실링부재를 사이에 두고 상기 실링면의 내측 단부와 외측 단부를 각각 냉각하는 내측 냉각부와 외측 냉각부로 마련될 수 있다.The cooling member may be provided as an inner cooling unit and an outer cooling unit for cooling the inner end and the outer end of the sealing surface with the sealing member interposed therebetween.
상기 내측 냉각부와 상기 외측 냉각부는 서로 다른 냉각 온도를 가질 수 있다.The inner cooling unit and the outer cooling unit may have different cooling temperatures.
상기 실링면의 내측 단부에 마련된 상기 내측 냉각부는 상기 외측 냉각부 보다 높은 냉각 온도를 가질 수 있다.The inner cooling unit provided at the inner end of the sealing surface may have a higher cooling temperature than the outer cooling unit.
상기 내측 냉각부와 외측 냉각부는 서로 다른 냉각 면적을 가질 수 있다.The inner cooling unit and the outer cooling unit may have different cooling areas.
상기 실링면의 내측 단부에 마련된 상기 내측 냉각부는 상기 외측 냉각부 보다 큰 냉각 면적을 가질 수 있다.The inner cooling unit provided at the inner end of the sealing surface may have a larger cooling area than the outer cooling unit.
상기 냉각부재와 상기 실링부재는 밀착되지 않게 배치되면서 상기 냉각부재와 상기 실링부재 사이에 단열 및 변형공간을 확보할 수 있다.The cooling member and the sealing member may be disposed in close contact with each other to secure an insulation and deformation space between the cooling member and the sealing member.
상기 냉각부재와 상기 실링부재 사이에는 단열재가 포함될 수 있다.An insulation may be included between the cooling member and the sealing member.
본 발명은 하기와 같은 효과가 있다.The present invention has the following effects.
첫째: 실링부재와 냉각부재를 포함하는 실링장치를 마련함으로써 파우치의 실링면을 열융착하여 실링함과 동시에 실링면의 내측 수지층을 냉각하여 파우치 내부로 인출되는 것을 방지하며, 이에 내측 수지층과 전극조립체가 접촉되는 것을 방지할 수 있다.Firstly, by providing a sealing device including a sealing member and a cooling member, the sealing surface of the pouch is heat-sealed and sealed, and at the same time, the inner resin layer of the sealing surface is prevented from being drawn out into the pouch. It is possible to prevent the electrode assembly from contacting.
둘째: 실링부재는 한 쌍으로 마련하여 실링면의 양면을 동시에 열융착하여 실링함으로써 실링력을 높일 수 있다.Secondly, the sealing member may be provided in pairs to increase the sealing force by heat-sealing both surfaces of the sealing surface at the same time.
셋째: 냉각부재는 한 쌍으로 마련하여 실링면의 양면을 동시에 냉각함으로써 내측 수지층의 용융을 현저히 방지할 수 있다.Third: The cooling member may be provided in pairs to simultaneously cool both sides of the sealing surface to significantly prevent melting of the inner resin layer.
도 1은 본 발명에 따른 이차전지의 실링장치를 도시한 도면.1 is a view showing a sealing device of a secondary battery according to the present invention.
도 2는 도 1에 표시된 A부분 확대도.FIG. 2 is an enlarged view of a portion A shown in FIG. 1; FIG.
도 3은 본 발명에 따른 이차전지의 실링장치를 도시한 확대단면도.Figure 3 is an enlarged cross-sectional view showing a sealing device of a secondary battery according to the present invention.
도 4는 본 발명에 따른 실링장치의 다른 실시예를 도시한 단면도.4 is a cross-sectional view showing another embodiment of a sealing apparatus according to the present invention.
도 5는 본 발명에 따른 실링장치의 또 다른 실시예를 도시한 단면도.5 is a cross-sectional view showing yet another embodiment of a sealing apparatus according to the present invention.
이하, 첨부한 도면을 참조하여 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 본 발명의 실시예를 상세히 설명한다. 그러나 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며 여기에서 설명하는 실시예에 한정되지 않는다. 그리고 도면에서 본 발명을 명확하게 설명하기 위해서 설명과 관계없는 부분은 생략하였으며, 명세서 전체를 통하여 유사한 부분에 대해서는 유사한 도면 부호를 붙였다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.
이차전지는 도 1에 도시되어 있는 것과 같이, 전극조립체(10), 전극조립체(10)를 수용한 상태로 상호 결합되는 상부 케이스와 하부 케이스로 마련된 파우치(20)를 포함한다. As shown in FIG. 1, the secondary battery includes an electrode assembly 10 and a pouch 20 formed of an upper case and a lower case that are coupled to each other while receiving the electrode assembly 10.
그리고 파우치(20)는 상부 케이스와 하부 케이스가 결합되면서 전극조립체(10)가 수용되는 수용부(21)와, 상기 수용부(21)의 테두리면에 구비되고 열융착하여 실링되는 실링면(22)으로 마련된다. And the pouch 20 is coupled to the upper case and the lower case, the receiving portion 21 is accommodated in the electrode assembly 10, the sealing surface 22 is provided on the rim surface of the receiving portion 21 and heat-sealed seal 22 Is prepared.
또한, 파우치(20)는 절연성과 안전성을 위해 내부수지층(20a), 금속층(20b), 외부수지층(20c)의 적층 구조를 가진다.In addition, the pouch 20 has a laminated structure of an inner resin layer 20a, a metal layer 20b, and an outer resin layer 20c for insulation and safety.
이와 같은 이차전지는 도 2에 도시되어 있는 것과 같이, 전극조립체(10)를 파우치(20)의 수용부(21)에 수용한 상태로 실링면(22)을 열융착하여 실링한다. 이때 본 발명에 따른 이차전지용 실링장치(100)를 이용한다.As shown in FIG. 2, the secondary battery seals the sealing surface 22 by heat-sealing the electrode assembly 10 in the accommodating portion 21 of the pouch 20. At this time, the secondary battery sealing apparatus 100 according to the present invention is used.
본 발명에 따른 이차전지용 실링장치(100)는 도 2에 도시되어 있는 것과 같이, 전극조립체(10)가 수용된 파우치(20)의 실링면(22)을 열융착하여 실링하는 실링부재(110)를 포함한다. The secondary battery sealing apparatus 100 according to the present invention, as shown in Figure 2, the sealing member 110 for sealing by heat sealing the sealing surface 22 of the pouch 20, the electrode assembly 10 is accommodated Include.
즉, 본 발명에 따른 이차전지용 실링장치(100)는 고온으로 가열된 실링부재(110)를 이용하여 파우치(20)의 실링면(22)을 가압함과 동시에 열융착시켜서 실링한다.That is, the secondary battery sealing apparatus 100 according to the present invention uses the sealing member 110 heated at a high temperature to pressurize the sealing surface 22 of the pouch 20 and to heat seal the same.
여기서 실링부재(110)는 한 쌍으로 이루어져, 실링면(22)의 상면과 하면을 동시에 가압하면서 열융착하며, 이에 실링면(22)의 실링력을 높일 수 있다.Here, the sealing member 110 is composed of a pair, heat-sealed while pressing the upper and lower surfaces of the sealing surface 22 at the same time, thereby increasing the sealing force of the sealing surface 22.
한편, 본 발명에 따른 이차전지용 실링장치(100)는 실링부재(110)를 이용하여 실링면(22)을 열융착할 시 실링부재(110)의 열원에 의해 실링면(22) 내측의 내부수지층(20a)이 용융되고, 용융된 내부수지층(20a)은 실링면(22) 외부로 흘러서 인출되는 문제점이 있었다. 특히 내부수지층(20a)이 수용부(21)로 인출될 경우 내부수지층(20a)과 전극조립체(10)가 접촉되면서 전극조립체(10)가 훼손되는 문제점이 있었다.On the other hand, the secondary battery sealing apparatus 100 according to the present invention when the heat sealing the sealing surface 22 using the sealing member 110 by the heat source of the sealing member 110 internal water inside the sealing surface 22 The ground layer 20a is melted, and the molten inner resin layer 20a flows out of the sealing surface 22 to draw out. In particular, when the inner resin layer 20a is drawn out to the accommodating portion 21, the electrode assembly 10 is damaged as the inner resin layer 20a and the electrode assembly 10 come into contact with each other.
이와 같은 문제를 해결하기 위해 본 발명에 따른 이차전지의 실링장치(100)는 실링부재(110)에 의해 용융된 내부수지층(20a)이 실링면(22) 외부로 흘러서 인출되지 않도록 냉각하는 냉각부재(120)를 구비한다. 즉, 냉각부재(120)는 실링면(22)의 내측 단부(도 3에서 보았을 때 실링면의 우측 단부)와 외측 단부(도 3에서 보았을 때 실링면의 좌측 단부)를 각각 냉각한다.In order to solve such a problem, the sealing device 100 of the secondary battery according to the present invention is cooled to cool the inner resin layer 20a melted by the sealing member 110 so as not to flow out of the sealing surface 22. The member 120 is provided. That is, the cooling member 120 cools the inner end (right end of the sealing surface as seen in FIG. 3) and the outer end (left end of the sealing surface as seen in FIG. 3) of the sealing surface 22, respectively.
보다 상세히 설명하면, 냉각부재(120)는 실링부재(110)를 사이에 두고 실링면(22)의 내측 단부와 외측 단부를 각각 냉각하는 내측 냉각부(121)와 외측 냉각부(122)로 마련된다. 즉 실링부재(110)는 실링면(22) 내측의 내부수지층(20a)을 용융하여 실링하는 한편, 내측 냉각부(121)와 외측 냉각부(122)는 실링면(22)의 내측 단부와 외측 단부를 냉각하여 용융된 내부수지층(20a)이 실링면(22)의 내측 단부와 외측 단부로 인출되는 것을 방지한다. 특히 냉각부재(120)는 실링면(22)의 외측방향과 수용부 방향으로 인출되는 것을 모두 방지할 수 있다.In more detail, the cooling member 120 includes an inner cooling part 121 and an outer cooling part 122 cooling the inner and outer ends of the sealing surface 22 with the sealing member 110 interposed therebetween. do. That is, the sealing member 110 melts and seals the inner resin layer 20a inside the sealing surface 22, while the inner cooling part 121 and the outer cooling part 122 are formed at the inner end of the sealing surface 22. The outer end is cooled to prevent the molten inner resin layer 20a from being drawn out to the inner and outer ends of the sealing surface 22. In particular, the cooling member 120 can prevent both the outer side and the receiving portion of the sealing surface 22 to be drawn out.
여기서 냉각부재(120)는 한 쌍으로 이루어져, 실링면(22)의 상면과 하면을 동시에 냉각하며, 이에 실링면(22)을 보다 효과적으로 냉각할 수 있다.Here, the cooling member 120 is formed in a pair to cool the upper and lower surfaces of the sealing surface 22 at the same time, thereby cooling the sealing surface 22 more effectively.
한편, 냉각부재(120)에서 내측 냉각부(121)와 외측 냉각부(122)는 서로 다른 냉각 온도를 가진다. 즉, 실링면(22)의 내측 단부와 외측 단부는 서로 다른 두께를 가질 있으며, 내측 단부와 외측 단부의 두께 차이에 따라 내측 냉각부(121)와 외측 냉각부(122)의 냉각 온도를 다르게 조절하여 실링면(22) 내측의 내부수지층(20a)을 보다 효과적으로 냉각할 수 있다. On the other hand, the inner cooling unit 121 and the outer cooling unit 122 in the cooling member 120 has a different cooling temperature. That is, the inner end and the outer end of the sealing surface 22 may have different thicknesses, and differently control the cooling temperatures of the inner cooling unit 121 and the outer cooling unit 122 according to the thickness difference between the inner end and the outer end. Thus, the inner resin layer 20a inside the sealing surface 22 can be cooled more effectively.
첫번째 예로, 실링면(22)의 내측 단부에 마련된 내측 냉각부(121)는 실링면(22)의 외측 단부에 마련된 외측 냉각부(122) 보다 높은 냉각 온도를 가지며, 이에 실링면(22)의 내측 단부에 위치한 내부수지층(20a)를 보다 효과적으로 냉각하여 수용부방향으로 내부수지층(20a)이 인출되는 것을 방지할 수 있다.As a first example, the inner cooling part 121 provided at the inner end of the sealing surface 22 has a higher cooling temperature than the outer cooling part 122 provided at the outer end of the sealing surface 22, thereby By cooling the inner resin layer 20a positioned at the inner end portion more effectively, it is possible to prevent the inner resin layer 20a from being drawn out toward the receiving portion.
두번째 예로, 실링면(22)은 내측 단부에서 외측 단부로 갈수록 점차 두께가 작아지는 형태를 가지며, 이에 실링면(22)의 내측 단부를 냉각하는 내측 냉각부(121)의 냉각 온도는 실링면(22)의 외측 단부를 냉각하는 외측 냉각부(122)의 냉각 온도 보다 높게 설정하여 냉각 효율성을 높일 수 있다. As a second example, the sealing surface 22 has a form in which the thickness gradually decreases from the inner end to the outer end, whereby the cooling temperature of the inner cooling unit 121 cooling the inner end of the sealing surface 22 is a sealing surface ( It is possible to increase the cooling efficiency by setting higher than the cooling temperature of the outer cooling unit 122 for cooling the outer end of 22).
한편, 실링면(22)의 내측 단부에 마련된 내측 냉각부(121)는 외측 냉각부(122) 보다 큰 냉각 면적을 가진다. 즉, 실링면(22)의 내측 단부로 내측 수지층(20a)이 인출될 경우 전극조립체가 훼손되는 문제점이 있기 때문에, 내측 냉각부(121)의 냉각 면적을 외측 냉각부(122)의 냉각 면적 보다 크게 형성하여 실링면(22)의 내측 단부에 위치한 내측 수지층(20a)을 효과적으로 냉각할 수 있고, 이에 수용부 방향으로 내부수지층(20a)이 인출되는 것을 방지할 수 있다.한편, 냉각부재(120)와 실링부재(110)는 도 4에 도시되어 있는 것과 같이, 밀착되지 않게 배치되며, 이에 냉각부재(120)와 실링부재(110) 사이에 단열 및 변형공간을 확보한다. 즉, 상기 단열 및 변형공간에 의해 냉각부재(120)와 실링부재(110)의 열 또는 냉기 교환을 방지할 수 있다. 예로 실링부재(110)의 고온이 냉각부재(120)에 전달되면서 냉각 온도가 상승할 수 있지만, 단열 및 변형공간을 통해 열 전달을 차단하여 냉각부재(120)의 냉각 온도가 낮아지는 것을 방지할 수 있다.On the other hand, the inner cooling unit 121 provided at the inner end of the sealing surface 22 has a larger cooling area than the outer cooling unit 122. That is, since the electrode assembly is damaged when the inner resin layer 20a is drawn out to the inner end of the sealing surface 22, the cooling area of the inner cooling unit 121 is changed to the cooling area of the outer cooling unit 122. The inner resin layer 20a positioned at the inner end of the sealing surface 22 can be cooled more effectively, thereby preventing the inner resin layer 20a from being pulled out in the direction of the receiving portion. As shown in FIG. 4, the member 120 and the sealing member 110 are disposed not to be in close contact with each other, thereby securing an insulation and deformation space between the cooling member 120 and the sealing member 110. That is, heat or cold air exchange between the cooling member 120 and the sealing member 110 may be prevented by the heat insulation and deformation space. For example, while the high temperature of the sealing member 110 is transmitted to the cooling member 120, the cooling temperature may be increased, but the heat transfer is prevented through the heat insulation and deformation space to prevent the cooling temperature of the cooling member 120 from lowering. Can be.
특히 실링부재(110)와 냉각부재(120) 사이의 상기 단열 및 변형공간으로 용융된 내측 수지층(20a)을 포함하는 실링면(22)이 밀려나옴으로써 내측 수지층(20a)의 외부 인출을 현저히 방지할 수 있다. In particular, the sealing surface 22 including the inner resin layer 20a melted into the heat insulation and deformation space between the sealing member 110 and the cooling member 120 is pushed out, thereby causing the external drawing of the inner resin layer 20a to be withdrawn. Significantly can be prevented.
한편, 냉각부재(120)와 실링부재(110) 사이의 단열 및 변형공간에는 도 5에 도시되어 있는 것과 같이, 단열재(130)가 포함될 수 있으며, 단열재(130)는 냉각부재(120)와 실링부재(110)의 열 또는 냉기 교환을 효과적으로 차단할 수 있다.이와 같은 구성을 가진 본 발명에 따른 이차전지의 실링장치(100)는 파우치의 실링면을 열융착하더라도 실링면 내측의 내부수지층(20a)이 용융하여 흘러나오는 것을 방지할 수 있으며, 이에 내부수지층(20a)과 전극조립체(10)가 접촉되는 것을 방지하고, 전극조립체(20a)의 훼손을 방지할 수 있다.On the other hand, the heat insulating and deformation space between the cooling member 120 and the sealing member 110, as shown in Figure 5, may include a heat insulating material 130, the heat insulating material 130 is a cooling member 120 and the sealing It is possible to effectively block heat or cold air exchange of the member 110. Even if the sealing device 100 of the secondary battery according to the present invention having the above configuration is heat-sealed with the sealing surface of the pouch, the inner resin layer 20a inside the sealing surface ) Can be prevented from melting and flowing out, it is possible to prevent the inner resin layer (20a) and the electrode assembly 10 in contact with each other, and to prevent damage to the electrode assembly (20a).
즉, 본 발명에 따른 이차전지의 실링장치(100)는 실링공정 시 실링부재(110)가 파우치를 실링함과 동시에 내측 냉각부(121)와 외측 냉각부(122)를 포함하는 냉각부재(120)가 실링면의 양단부를 냉각하며, 이에 실링부재(110)의 양단부의 수지는 냉각부재(120)에 의해 냉각되어 고화되므로 중앙부의 수지가 용융되더라도 외부로 흘러나가는 것을 방지할 수 있다.That is, in the sealing apparatus 100 of the secondary battery according to the present invention, the sealing member 110 seals the pouch during the sealing process and simultaneously includes the cooling member 120 including the inner cooling part 121 and the outer cooling part 122. ) Cools both ends of the sealing surface, and the resin at both ends of the sealing member 110 is cooled and solidified by the cooling member 120, so that the resin at the center may be prevented from flowing out even if the resin is melted at the center.
이상에서 본 발명은 비록 한정된 실시예와 도면에 의해 설명되었으나, 본 발명은 이것에 의해 한정되지 않으며 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술사상과 아래에 기재될 특허청구범위의 균등범위 내에서 다양한 수정 및 변형이 가능함은 물론이다.Although the present invention has been described above by means of limited embodiments and drawings, the present invention is not limited thereto and will be described below by the person skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the claims.

Claims (10)

  1. 전극조립체가 수용된 파우치의 실링면을 열융착하여 실링하는 실링부재; 및A sealing member for sealing by sealing the sealing surface of the pouch in which the electrode assembly is accommodated; And
    상기 실링면을 냉각하는 냉각부재를 포함하는 것을 특징으로 하는 이차전지의 실링장치.Sealing device for a secondary battery comprising a cooling member for cooling the sealing surface.
  2. 청구항 1에 있어서,The method according to claim 1,
    상기 실링부재는 상기 실링면의 상면과 하면을 동시에 열융착하여 실링하는 것을 특징으로 하는 이차전지의 실링장치.The sealing member is a sealing device of a secondary battery, characterized in that the sealing by heat-sealing the upper and lower surfaces of the sealing surface at the same time.
  3. 청구항 1에 있어서,The method according to claim 1,
    상기 냉각부재는 상기 실링면의 상면과 하면을 동시에 냉각하는 것을 특징으로 하는 이차전지의 실링장치.The cooling member sealing device of the secondary battery, characterized in that for cooling the upper and lower surfaces of the sealing surface at the same time.
  4. 청구항 1에 있어서,The method according to claim 1,
    상기 냉각부재는 상기 실링부재를 사이에 두고 상기 실링면의 내측 단부와 외측 단부를 각각 냉각하는 내측 냉각부와 외측 냉각부로 마련되는 것을 특징으로 하는 이차전지의 실링장치.The cooling member is a sealing device of a secondary battery, characterized in that the inner cooling portion and the outer cooling portion for cooling the inner end and the outer end of the sealing surface with the sealing member therebetween.
  5. 청구항 4에 있어서,The method according to claim 4,
    상기 내측 냉각부와 상기 외측 냉각부는 서로 다른 냉각 온도를 가지는 것을 특징으로 하는 이차전지의 실링장치.Sealing device of a secondary battery, characterized in that the inner cooling unit and the outer cooling unit has a different cooling temperature.
  6. 청구항 5에 있어서,The method according to claim 5,
    상기 실링면의 내측 단부에 마련된 상기 내측 냉각부는 상기 외측 냉각부 보다 높은 냉각 온도를 가지는 것을 특징으로 하는 이차전지의 실링장치.And the inner cooling part provided at the inner end of the sealing surface has a higher cooling temperature than the outer cooling part.
  7. 청구항 4에 있어서,The method according to claim 4,
    상기 내측 냉각부와 외측 냉각부는 서로 다른 냉각 면적을 가지는 것을 특징으로 하는 이차전지의 실링장치. The inner cooling unit and the outer cooling unit sealing device of the secondary battery characterized in that it has a different cooling area.
  8. 청구항 7에 있어서,The method according to claim 7,
    상기 실링면의 내측 단부에 마련된 상기 내측 냉각부는 상기 외측 냉각부 보다 큰 냉각 면적을 가지는 것을 특징으로 하는 이차전지의 실링장치.And the inner cooling unit provided at the inner end of the sealing surface has a larger cooling area than the outer cooling unit.
  9. 청구항 4에 있어서,The method according to claim 4,
    상기 냉각부재와 상기 실링부재는 밀착되지 않게 배치되면서 상기 냉각부재와 상기 실링부재 사이에 단열 및 변형공간을 확보하는 것을 특징으로 하는 이차전지의 실링장치. The cooling member and the sealing member is disposed so as not to be in contact with the sealing device of the secondary battery, characterized in that to ensure a heat insulating and deformation space between the cooling member and the sealing member.
  10. 청구항 4에 있어서,The method according to claim 4,
    상기 냉각부재와 상기 실링부재 사이에는 단열재가 포함되는 것을 특징으로 하는 이차전지의 실링장치. Sealing device of a secondary battery, characterized in that a heat insulating material is included between the cooling member and the sealing member.
PCT/KR2016/009550 2015-08-27 2016-08-26 Secondary battery sealing device WO2017034380A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201680022215.0A CN108012570B (en) 2015-08-27 2016-08-26 Apparatus for sealing secondary battery
US15/563,396 US10777840B2 (en) 2015-08-27 2016-08-26 Apparatus for sealing secondary battery
PL16839668T PL3264488T3 (en) 2015-08-27 2016-08-26 Secondary battery sealing device
EP16839668.7A EP3264488B8 (en) 2015-08-27 2016-08-26 Secondary battery sealing device
JP2017556154A JP6535388B2 (en) 2015-08-27 2016-08-26 Sealing device for secondary battery

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KR10-2015-0121184 2015-08-27
KR20150121184 2015-08-27
KR1020160108595A KR20170026230A (en) 2015-08-27 2016-08-25 apparatus for sealing secondary battery
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KR101471765B1 (en) * 2012-06-14 2014-12-10 주식회사 엘지화학 Sealing method of pouch-type secondary battery, pouch-type secondary battery, and method for manufacturing the same
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KR101471765B1 (en) * 2012-06-14 2014-12-10 주식회사 엘지화학 Sealing method of pouch-type secondary battery, pouch-type secondary battery, and method for manufacturing the same
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