WO2014107093A1 - Heat dissipation supporting member, having self-supporting capacity, for pouch-type secondary battery and pouch-type secondary battery comprising same - Google Patents

Heat dissipation supporting member, having self-supporting capacity, for pouch-type secondary battery and pouch-type secondary battery comprising same Download PDF

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Publication number
WO2014107093A1
WO2014107093A1 PCT/KR2014/000149 KR2014000149W WO2014107093A1 WO 2014107093 A1 WO2014107093 A1 WO 2014107093A1 KR 2014000149 W KR2014000149 W KR 2014000149W WO 2014107093 A1 WO2014107093 A1 WO 2014107093A1
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WIPO (PCT)
Prior art keywords
pouch
heat dissipation
electrode assembly
secondary battery
support member
Prior art date
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PCT/KR2014/000149
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French (fr)
Korean (ko)
Inventor
진예진
Original Assignee
에스케이이노베이션 주식회사
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Publication of WO2014107093A1 publication Critical patent/WO2014107093A1/en

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/64Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647Prismatic or flat cells, e.g. pouch cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/543Terminals
    • H01M50/552Terminals characterised by their shape
    • H01M50/553Terminals adapted for prismatic, pouch or rectangular cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/61Types of temperature control
    • H01M10/613Cooling or keeping cold
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/654Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/655Solid structures for heat exchange or heat conduction
    • H01M10/6554Rods or plates
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/543Terminals
    • H01M50/547Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Definitions

  • the present invention relates to a heat dissipation support member for a pouch type secondary battery having a self-supporting ability and a pouch type secondary battery having the same.
  • a secondary battery is a battery capable of repeatedly charging and discharging.
  • a secondary battery is widely used in a lightweight portable device such as a mobile phone, a notebook computer, a camera, or an electric vehicle or a hybrid vehicle.
  • a secondary battery of a type using a non-aqueous electrolyte having a high energy density has a good output and is used to drive a motor of an electric vehicle by connecting a plurality of them in series.
  • the secondary battery may be manufactured in various forms, such as a pouch type, a cylindrical shape, or a square shape.
  • a pouch type in the case of the pouch type, its shape is relatively free, light in weight, slim and lightweight, and is widely used for portable devices.
  • the pouch serving as a case in the pouch-type secondary battery has a laminated structure in which a thin film of a metal film and an insulating film are attached to both sides thereof, and is freely bent, unlike a cylindrical or rectangular shape formed of a thick metal material.
  • the case itself forming the outer shape is made of a flexible material, it is difficult to apply a separate structure for improving heat dissipation characteristics because it does not take a standardized form. That is, it is difficult to effectively dissipate heat generated from the electrode assembly inside the pouch.
  • Korean Patent Laid-Open No. 2011-0082745 discloses a pouch type secondary battery having a heat dissipation member.
  • the heat dissipation member is integrally formed with the positive electrode plate of the electrode assembly accommodated inside the pouch, and extends to the outside of the pouch, and serves to extract heat generated in the pouch to be discharged to the outside in a state of being fixed to the outer surface of the pouch.
  • the secondary battery of the above-mentioned type should not only anodize the heat dissipation member exposed to the outside of the pouch but also apply an expensive thermal grease to fix the heat dissipation member to the pouch. There was a downside.
  • cooling plate when the cooling plate is located outside the pouch as described above, it is very easy to generate an air gap between the pouch and the cooling plate is not good heat radiation efficiency. Accordingly, in order to increase the heat dissipation efficiency, a larger size cooling plate must be applied, which causes an increase in cost and increases the volume of the device.
  • the most important thing in the pouch is to provide a stable sealing force so that the electrolyte solution inside the pouch does not leak, the conventional secondary battery, the heat dissipation member extended to the outside of the pouch to the fusion portion of the pouch
  • Another problem is that microscopic crevices can occur. If a gap occurs, the electrolyte may leak and a short circuit may occur or ignite due to the leaked electrolyte.
  • the present invention is to solve the above problems, since the heat dissipation support member responsible for heat dissipation is completely accommodated in the pouch in a state in close contact with the inward surface of the pouch, there is no fear that the fusion portion of the pouch will be opened so that the sealing is stable and the electrode assembly Heat dissipation efficiency is good, in particular, the heat dissipation support member has a structure that can be placed vertically on the horizontal target surface, the heat dissipation support member for pouch-type secondary battery having a self-supporting ability that can be easily installed in the external cooling unit and the pouch having the same It is an object to provide a type secondary battery.
  • a self-supporting heat dissipation support member having a support member is provided.
  • the heat dissipation support member It takes the form of a plate of constant thickness and at least two surfaces are bent to face the electrode assembly.
  • the heat dissipation support member Covering the electrode assembly and interviewing the inward surface of the pouch, absorbing heat generated from the electrode assembly and dissipating it to the outside of the pouch; It has a support located opposite the portion where the positive electrode tab and the negative electrode tab are located.
  • the support part is further provided with an insulating sheet for insulation between the support part and the electrode assembly.
  • the heat dissipation support member A heat dissipation unit covering the electrode assembly and in close contact with an inward surface of the pouch, absorbing heat generated from the electrode assembly and dissipating it to the outside of the pouch, and integrally formed at both ends of the heat dissipating unit and bent with respect to the heat dissipating unit; It consists of supports which are located on opposite sides of the assembly.
  • the heat dissipation supporting member is made of copper or aluminum or HOPG (highly ordered pyrolytic graphite).
  • the heat dissipation support member for a pouch type secondary battery having the self-supporting capability of the present invention for achieving the above object is built with the electrode assembly in the inside of the pouch providing a sealed receiving space, in close contact with the inward surface of the pouch In one state, the heat generated from the electrode assembly is absorbed and released to the outside of the pouch, and the support is provided so that the pouch can be placed on a horizontal plane.
  • the heat dissipation support member It takes the form of a plate having a predetermined thickness, the heat dissipation portion in close contact with the inward surface of the pouch and absorbs heat generated from the electrode assembly, the heat dissipation unit is integral with the heat dissipation unit and bent to the heat dissipation unit, It is provided on the opposite side of the electrode tab and the cathode tab of the electrode assembly is provided with a support that is parallel to the horizontal plane with the electrode assembly upright.
  • the heat dissipation portion and the support portion form a right angle
  • the support portion is provided with an insulating sheet for insulation between the support portion and the electrode assembly.
  • the heat dissipation support member A heat dissipation unit covering the electrode assembly and interviewing the inward side of the pouch, absorbing heat generated from the electrode assembly, and integrally formed at both ends of the heat dissipation unit, and bent to the heat dissipation unit, and being both sides of the electrode assembly. And a support part positioned parallel to the horizontal plane with the electrode assembly standing up.
  • the heat dissipation supporting member is made of copper or aluminum or HOPG (highly ordered pyrolytic graphite).
  • FIG. 1 is an exploded perspective view of a pouch type secondary battery provided with a heat dissipation supporting member having self-supporting ability according to an embodiment of the present invention.
  • FIG. 2 is a partially enlarged perspective view illustrating the heat dissipation supporting member illustrated in FIG. 1 separately.
  • FIG. 3 is a side cross-sectional view of the pouch type secondary battery illustrated in FIG. 2.
  • Figure 4 is a perspective view showing another example of a pouch-type secondary battery provided with a heat dissipation support member having a self-supporting ability according to an embodiment of the present invention.
  • FIG. 5 is an exploded perspective view showing another example of a pouch type secondary battery provided with a heat dissipation supporting member having self-standing ability according to an embodiment of the present invention.
  • FIG. 1 is an exploded perspective view of a pouch type secondary battery 11 provided with a heat dissipation supporting member 19 having a self-supporting ability according to an embodiment of the present invention.
  • the pouch type secondary battery 11 As shown, the pouch type secondary battery 11 according to the present embodiment, the pouch 12 and the inner space corresponding to each other and the heat-sealed in the state that the edge portion is interviewed to provide the inner space (13b), and the inner space ( 13b), the electrode assembly 17 having the positive electrode tab 17a and the negative electrode tab 17b on one side thereof, and the heat dissipation supporting member 19 embedded in the pouch 12 together with the electrode assembly 17. It consists of.
  • the pouch 12 is composed of a lower pouch piece 13 and an upper pouch piece 15 to accommodate the electrolyte solution therein.
  • the fusion heat is applied to the three fusion surfaces 13a provided at the edge portions of the lower pouch pieces 13 in a state where the edge portions of the upper pouch pieces 15 are interviewed, the upper and lower pouch pieces 15 and 17 are melted and integrated. do.
  • the electrode assembly 17 is made to be flat so that it can be accommodated in the inner space 13b by pressing the laminated body composed of the positive electrode plate 17c, the separator 17d, and the negative electrode plate 17e in a wound state.
  • the electrode assembly 17 is applied in a jelly roll type, but any type of electrode assembly may be applied to the secondary battery of this embodiment.
  • the positive electrode plate 17c is coated with an active material on both sides of a metal thin plate having excellent conductivity, for example, aluminum foil.
  • the active material is a chalcogenide (chalcogenide) compound, for example, a composite metal oxide such as LiCo 2 , LiMn 2 O 4 , LiNiO 2 , LiNiMnO 2, and the like.
  • the negative electrode plate 17e is coated with a negative electrode active material on both surfaces of a current collector made of copper or nickel foil.
  • a current collector made of copper or nickel foil.
  • Carbon-based materials, Si, Sn, tin oxide, tin alloy composites, transition metal oxides and the like are used as the negative electrode active material.
  • the heat dissipation support member 19 is a plate-shaped member having a predetermined thickness, the heat dissipation portion 19a covering one side of the electrode assembly 17 and the heat dissipation portion 19a integrally with the electrode It consists of a support 19b which is located at the lower end of the assembly 17, that is, opposite the portion where the positive electrode tab 17a and the negative electrode tab 17b are located.
  • the support 19b is in contact with the lower end of the electrode assembly 17. At this time, in order to insulate the electrode assembly 17 and the heat dissipation support member 19, an insulating sheet 19c is stacked on the support 19b.
  • the insulating sheet 19c will be described later with reference to FIG. 2.
  • the heat dissipation support member 19 is bent at a right angle to the heat dissipation portion 19a at a right angle to have a substantially lateral shape.
  • the heat dissipation support member 19 shown in FIG. 1 is a basic type, and of course, the shape of the heat dissipation support member can be changed as needed.
  • the heat dissipation support member 19 has a certain elastic force and maintains the angle of the right angle. For example, if the force is removed while the heat dissipation unit 19a and the support unit 19b are opened by applying an external force, the initial state is returned.
  • the heat dissipating portion 19a collects heat generated from the electrode assembly 17 in contact with one side surface of the electrode assembly 17 in a state of being in close contact with the inwardly facing surface of the upper pouch piece 15 to collect the upper pouch piece 15. Release through the outside.
  • the heat dissipation unit 19a may be brought into close contact with the electrode assembly 17, or an electrolyte may be filled between the heat dissipation unit 19a and the electrode assembly 17 with a gap therebetween.
  • the support 19b is applied to put the heat radiating portion 19a upright. For example, as shown in FIG. 3, when the support 19b is placed on a horizontal plane, the heat radiating portion 19a is erected vertically.
  • the support portion 19b is fitted between the lower end portion of the electrode assembly 17 and the inner wall surface 13c of the lower pouch piece 13 and is in close contact with the inner wall surface 13c.
  • the heat dissipation support member 19 having the above-described configuration may be made of a conductive metal such as copper or aluminum, or a highly ordered pyrolytic graphite (HOPG).
  • a conductive metal such as copper or aluminum
  • HOPG highly ordered pyrolytic graphite
  • FIG. 2 is a partially enlarged perspective view of the heat dissipation support member 19 illustrated in FIG. 1 separately.
  • the heat radiating portion 19a and the supporting portion 19b are bent to have a right angle.
  • the angle between the heat dissipation unit 19a with respect to the support unit 19b may vary depending on the width w of the support unit 19b. For example, it may be formed in an angle range of 85 ° to 90 °.
  • an insulating sheet 19c is laminated on the upper surface of the support part 19b.
  • the insulating sheet 19c is to insulate the support 19b from the electrode assembly 17 and may have the same material as the separator 17d.
  • a synthetic resin such as rubber or silicone, which is resistant to the electrolyte, may be applied.
  • FIG. 3 is a side cross-sectional view of the pouch type secondary battery 11 illustrated in FIG. 2.
  • the pouch-type secondary battery 11 has a feature in that the heat dissipation support member 19 is built into the pouch 12 so that the secondary battery 11 can be placed on an external object.
  • To stand up also means that the external object and the side or the bottom of the secondary battery (the opposite side where the electrode is located) interview.
  • the secondary battery 11 When the secondary battery 11 is laid down on the water cooling unit 27, heat dissipation may be faster. However, in order to package a plurality of secondary batteries 11, the secondary battery 11 may not be laid down.
  • the heat generated from the electrode assembly 17 is absorbed by the heat dissipation support member 19, and a part of the heat is transferred to the water-cooled cooling part 27 through the pouch after reaching the support 19b, The rest is discharged into the air through the lower pouch piece 13 from the heat radiating portion 19a.
  • Figure 4 is a perspective view showing another example of a pouch-type secondary battery provided with a heat dissipation support member having a self-supporting ability according to an embodiment of the present invention.
  • the secondary battery 11 has a heat dissipation supporting member 25 having a shape of approximately c.
  • the heat dissipation support member 25 has a shape having a predetermined thickness, and includes a heat dissipation portion 25a contacting one side surface of the electrode assembly 17 and support portions formed at both ends of the heat dissipation portion 25a. 25b).
  • the support part 25b is flat and has a certain area so that the secondary battery 11 can be placed sideways on a horizontal plane.
  • the angle between each support portion 25b with respect to the heat radiation portion 25a is the same as the heat radiation support member described with reference to FIG. 2.
  • the support portion 25b is bitten by the fusion between the lower pouch piece 13 and the upper pouch piece 15.
  • the bent portion is not disturbed when the secondary battery 11 is set to the side by surrounding the bent support portion 25b with the fusion portion.
  • the heat dissipation unit 25a covers the electrode assembly 17 in close contact with the lower pouch piece 13 to release heat absorbed from the electrode assembly 17 to the outside through the lower pouch piece 13, or both ends thereof. To the support 25b.
  • the secondary battery 11 of the type shown in FIG. 4 may be disposed side by side since the supporting portion 25b is located at both sides of the electrode assembly 17. That is, when setting the plurality of secondary batteries 11 on the water cooling part 27 (to construct a package), the water cooling part with one support part 25b of the two support parts 25b sandwiched between the pouches. Indirect contact with (27).
  • the material of the heat dissipation support member 25 is the same as that of the heat dissipation support member 19 of FIG. 1.
  • FIG. 5 is an exploded perspective view showing another example of a pouch type secondary battery provided with a heat dissipation supporting member having self-standing ability according to an embodiment of the present invention.
  • the electrode assembly 17 shown in FIG. 5 is an assembly of the type in which the positive electrode tab 17a and the negative electrode tab 17b are located on opposite sides. As described above, the type of the electrode assembly which can be applied to the secondary battery according to the present embodiment is not determined.
  • the electrode assembly 17 and the heat dissipation supporting member 19 are embedded in the inner space 13b provided by the pouch 12.
  • the heat dissipation support member 19 is the same as the type shown in FIG. 2 and is bent by a letter B to have a heat dissipation portion 19a and a support portion 19b.
  • the support 19b is a flat rectangular portion that contacts one inner wall surface of the lower pouch piece 13 so that the secondary battery can stand when the secondary battery 11 is placed on the water cooling unit 27.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The present invention relates to a heat dissipation supporting member, having self-supporting capacity, for a pouch-type secondary battery and a pouch-type secondary battery comprising same. The secondary battery comprises: a pouch for providing an enclosed accommodating space in the inner area of welded parts formed by welding/bonding the surface contact parts of mutually corresponding pouch pieces with the edges of the pouch pieces in surface contact with each other; an electrode assembly which is accommodated, with an electrolyte, in the accommodating space of the pouch and has a positive electrode tab and a negative electrode tab which are extended to the outside of the pouch; and a heat dissipation supporting member which is embedded in the pouch, absorbs heat generated from the electrode assembly and emits the heat to the outside of the pouch while in close contact with the inward surfaces of the pouch pieces, and, at the same time, provides a support force so as to stand the pouch, which has the electrode assembly embedded therein, on a horizontal plane. Since the heat dissipation supporting member for heat dissipation is accommodated completely inside the pouch while in close contact with the inward surfaces of the pouch, there is no risk of the welded parts of the pouch being separated from each other. Accordingly, sealing is secure, and the electrode assembly has excellent heat dissipation efficiency. In particular, the heat dissipation supporting member has a structure which allows standing vertically on a horizontal target surface, and thus can easily be applied to an external cooling unit.

Description

자립능력을 갖는 파우치형 이차전지용 방열지지부재 및 이를 갖는 파우치형 이차전지Heat dissipation support member for pouch type secondary battery having self-supporting ability and pouch type secondary battery having same
[관련출원의 상호참조][Cross References of Related Applications]
본 출원은 2013년 1월 7일 출원된 한국특허 출원번호 제10-2013-0001602호를 우선권 주장하고 있으며, 상기 특허 문헌의 내용은 참조를 위해 본 발명에 모두 포함된다.This application claims priority to Korean Patent Application No. 10-2013-0001602, filed January 7, 2013, the contents of which are incorporated by reference in their entirety for reference.
본 발명은 자립능력을 갖는 파우치형 이차전지용 방열지지부재 및 이를 갖는 파우치형 이차전지에 관한 것이다.The present invention relates to a heat dissipation support member for a pouch type secondary battery having a self-supporting ability and a pouch type secondary battery having the same.
이차전지(Secondary battery)는 일차전지와 달리 반복적 충방전이 가능한 전지로서, 가령 휴대폰이나 노트북컴퓨터 또는 카메라와 같은 경량 휴대 기기에서부터 전기자동차나 하이브리드자동차에 이르기까지 널리 사용되고 있다.Unlike a primary battery, a secondary battery is a battery capable of repeatedly charging and discharging. For example, a secondary battery is widely used in a lightweight portable device such as a mobile phone, a notebook computer, a camera, or an electric vehicle or a hybrid vehicle.
최근, 기술의 급속한 발전에 따라, 보다 작고 가벼운 대용량 고출력 이차전지가 속속 개발되고 있다. 예컨대 고에너지 밀도의 비수전해액을 이용한 타입의 이차전지는 출력이 좋아, 복수개를 직렬로 연결하여 전기자동차의 모터 구동에 사용된다.Recently, with the rapid development of technology, smaller and lighter high-capacity high-power secondary batteries are being developed one after another. For example, a secondary battery of a type using a non-aqueous electrolyte having a high energy density has a good output and is used to drive a motor of an electric vehicle by connecting a plurality of them in series.
상기한 이차전지는 다양한 형태로 제조가 가능하며, 이를테면 파우치형이나 원통형이나 각형으로 제작 할 수 있다. 특히 상기 파우치형의 경우 그 형상이 비교적 자유롭고 무게가 가벼우며 슬림화 및 경량화가 가능하여 휴대기기용으로 많이 사용되고 있다.The secondary battery may be manufactured in various forms, such as a pouch type, a cylindrical shape, or a square shape. In particular, in the case of the pouch type, its shape is relatively free, light in weight, slim and lightweight, and is widely used for portable devices.
상기 파우치형 이차전지에 있어서 케이스 역할을 하는 파우치는, 박막의 금속필름과 그 양면에 절연성 필름이 부착된 적층구조를 가지며, 두꺼운 금속재로 성형한 원통형이나 각형과 달리, 자유롭게 구부러짐이 가능하다.The pouch serving as a case in the pouch-type secondary battery has a laminated structure in which a thin film of a metal film and an insulating film are attached to both sides thereof, and is freely bent, unlike a cylindrical or rectangular shape formed of a thick metal material.
그런데, 상기한 파우치형의 경우, 외형을 이루는 케이스 자체가 유연성 소재로 이루어져 강성이 없으므로 정형화된 형태를 취하지 않아, 방열특성 개선을 위한 별도의 구조를 적용하기가 어려웠다. 즉, 파우치 내부의 전극조립체에서 발생하는 열을 효과적으로 방열하기가 힘들었다.However, in the case of the pouch type, since the case itself forming the outer shape is made of a flexible material, it is difficult to apply a separate structure for improving heat dissipation characteristics because it does not take a standardized form. That is, it is difficult to effectively dissipate heat generated from the electrode assembly inside the pouch.
공지의 사실과 같이, 이차전지는 충전과 방전을 수행하는 동안 내부에서 많은 열을 발생하므로 내부의 열을 신속히 방출하는 것이 매우 중요한데, 파우치형은 이런 방열문제가 취약한 것이다. 각형이나 원통형 이차전지는 상대적으로 방열이 용이한 편이다.As is known, secondary batteries generate a lot of heat during charging and discharging, so it is very important to release the heat quickly, and the pouch type is vulnerable to this heat dissipation problem. Rectangular or cylindrical secondary batteries are relatively easy to heat dissipation.
이러한 파우치형 이차전지에서의 방열을 위한 수단으로서, 국내공개특허 제2011-0082745호(이차전지)에, 방열부재가 구비되어 있는 파우치형 이차전지가 개시되어 있다. 상기 방열부재는 파우치 내부에 수납되는 전극조립체의 양극판에 일체를 이룬 것으로서 파우치의 외부로 연장된 후 파우치 외측면에 접착 고정된 상태로 파우치 내에서 발생하는 열을 외부로 빼내어 방출하는 역할을 한다.As a means for heat dissipation in such a pouch type secondary battery, Korean Patent Laid-Open No. 2011-0082745 (secondary battery) discloses a pouch type secondary battery having a heat dissipation member. The heat dissipation member is integrally formed with the positive electrode plate of the electrode assembly accommodated inside the pouch, and extends to the outside of the pouch, and serves to extract heat generated in the pouch to be discharged to the outside in a state of being fixed to the outer surface of the pouch.
그런데 상기한 타입의 이차전지는, 파우치의 외부로 노출되어 있는 방열부재를 아노다이징(anodizing) 처리해야 함은 물론, 방열부재를 파우치에 대해 고정시키기 위해 고가의 서멀그리스(Thermal grease)를 도포해야 한다는 단점이 있었다.By the way, the secondary battery of the above-mentioned type should not only anodize the heat dissipation member exposed to the outside of the pouch but also apply an expensive thermal grease to fix the heat dissipation member to the pouch. There was a downside.
또한 상기한 바와같이 파우치의 외부에 냉각용 플레이트를 위치시킬 경우, 파우치와 냉각플레이트와의 사이에 에어갭이 발생하기가 매우 쉬워 그만큼 방열효율이 좋지 못하다. 이에 따라 방열효율을 높이고자 더 큰 사이즈의 냉각용 플레이트를 적용해야 하는데 이것은 코스트의 상승을 유발하고 장치의 부피를 크게 하는 요인이된다.In addition, when the cooling plate is located outside the pouch as described above, it is very easy to generate an air gap between the pouch and the cooling plate is not good heat radiation efficiency. Accordingly, in order to increase the heat dissipation efficiency, a larger size cooling plate must be applied, which causes an increase in cost and increases the volume of the device.
또한 상기 파우치에 있어서 가장 중요하다고 할 수 있는 것은, 파우치 내부의 전해액이 누출되지 않도록 안정적 밀폐력을 제공하는 것인데, 상기한 종래의 이차전지는, 파우치 외부로 연장된 방열부재에 의해 파우치의 융착부위에 미세한 틈새가 발생할 수 있다는 또 다른 문제를 갖는다. 틈새가 발생하면 전해액이 누액되고 누출된 전해액으로 인하여 단락이 발생하거나 발화할 수 있다.In addition, the most important thing in the pouch is to provide a stable sealing force so that the electrolyte solution inside the pouch does not leak, the conventional secondary battery, the heat dissipation member extended to the outside of the pouch to the fusion portion of the pouch Another problem is that microscopic crevices can occur. If a gap occurs, the electrolyte may leak and a short circuit may occur or ignite due to the leaked electrolyte.
본 발명은 상기 문제점을 해결하기 위한 것으로서, 방열을 담당하는 방열지지부재가 파우치의 내향면에 밀착한 상태로 파우치 내에 완전히 수용되므로 파우치의 융착부가 벌어질 염려가 없어 그만큼 실링이 안정적이고 전극조립체의 방열효율이 좋으며, 특히 방열지지부재가 수평의 대상면 상에 수직으로 세워 놓을 수 있는 구조를 가져, 외부의 냉각부에 쉽게 설치할 수 있는 자립능력을 갖는 파우치형 이차전지용 방열지지부재 및 이를 갖는 파우치형 이차전지를 제공함에 목적이 있다.The present invention is to solve the above problems, since the heat dissipation support member responsible for heat dissipation is completely accommodated in the pouch in a state in close contact with the inward surface of the pouch, there is no fear that the fusion portion of the pouch will be opened so that the sealing is stable and the electrode assembly Heat dissipation efficiency is good, in particular, the heat dissipation support member has a structure that can be placed vertically on the horizontal target surface, the heat dissipation support member for pouch-type secondary battery having a self-supporting ability that can be easily installed in the external cooling unit and the pouch having the same It is an object to provide a type secondary battery.
상기 목적을 달성하기 위한 본 발명의 파우치형 이차전지는, 상호 대응하는 파우치편의 테두리부를 면접시킨 상태로 면접부위를 융착 결합하여 융착부의 내측 영역에 밀폐된 수용공간을 제공하는 파우치와; 상기 파우치의 수용공간 내에 전해액과 함께 수용되며 파우치 외부로 연장된 양극탭 및 음극탭을 갖는 전극조립체와; 상기 파우치에 내장되되, 파우치편의 내향면에 밀착한 상태로 전극조립체로부터 발생하는 열을 흡열하여 파우치 외부로 배출함과 동시에 전극조립체가 내장된 파우치를 수평면상에 세워 놓을 수 있도록 지지력을 제공하는 방열지지부재를 구비한 자립형 방열지지부재를 구비한다. Pouch-type secondary battery of the present invention for achieving the above object, a pouch for fusion-bonding the interview site in the state in which the rim portion of the corresponding pouch piece is interviewed to provide a receiving space sealed in the inner region of the fusion portion; An electrode assembly accommodated together with an electrolyte in the accommodating space of the pouch and having a positive electrode tab and a negative electrode tab extending out of the pouch; Heat dissipation that is built in the pouch, heat absorbing heat generated from the electrode assembly in a state in close contact with the inward surface of the pouch piece to discharge to the outside of the pouch and at the same time to provide a support force to stand up the pouch containing the electrode assembly on a horizontal plane A self-supporting heat dissipation support member having a support member is provided.
또한, 상기 방열지지부재는; 일정두께의 플레이트의 형태를 취하며 적어도 두 면 이상이 전극조립체에 대향하도록 절곡되어 있다.In addition, the heat dissipation support member; It takes the form of a plate of constant thickness and at least two surfaces are bent to face the electrode assembly.
또한, 상기 방열지지부재는; 상기 전극조립체를 커버하며 파우치의 내향면에 면접하고, 전극조립체에서 발생하는 열을 흡열하여 파우치 외부로 방출하는 방열부와, 상기 방열부에 일체를 이루며 직각으로 절곡된 상태를 취하고, 전극조립체의 양극탭 및 음극탭이 위치한 부분의 반대편에 위치하는 지지부를 갖는다.In addition, the heat dissipation support member; Covering the electrode assembly and interviewing the inward surface of the pouch, absorbing heat generated from the electrode assembly and dissipating it to the outside of the pouch; It has a support located opposite the portion where the positive electrode tab and the negative electrode tab are located.
또한, 상기 지지부에는, 지지부와 전극조립체간의 절연을 위한 절연시트가 더 구비된다.In addition, the support part is further provided with an insulating sheet for insulation between the support part and the electrode assembly.
아울러, 상기 방열지지부재는; 상기 전극조립체를 커버하며 파우치의 내향면에 밀착하고, 전극조립체에서 발생하는 열을 흡열하여 파우치 외부로 방출하는 방열부와, 상기 방열부의 양단부에 일체로 형성되며 방열부에 대해 절곡된 상태로 전극조립체의 양측부에 대응 위치하는 지지부로 이루어진다.In addition, the heat dissipation support member; A heat dissipation unit covering the electrode assembly and in close contact with an inward surface of the pouch, absorbing heat generated from the electrode assembly and dissipating it to the outside of the pouch, and integrally formed at both ends of the heat dissipating unit and bent with respect to the heat dissipating unit; It consists of supports which are located on opposite sides of the assembly.
또한, 상기 방열지지부재는, 구리 또는 알루미늄 또는 HOPG(highly ordered pyrolytic graphite)로 이루어진다.In addition, the heat dissipation supporting member is made of copper or aluminum or HOPG (highly ordered pyrolytic graphite).
또한, 상기 목적을 달성하기 위한 본 발명의 자립능력을 갖는 파우치형 이차전지용 방열지지부재는, 밀폐된 수용공간을 제공하는 파우치의 내부에 전극조립체와 함께 내장되는 것으로서, 상기 파우치의 내향면에 밀착한 상태로, 전극조립체로부터 발생하는 열을 흡열하여 파우치 외부로 방출함과 아울러 파우치를 수평면에 대해 세워 놓을 수 있도록 지지력을 제공한다.In addition, the heat dissipation support member for a pouch type secondary battery having the self-supporting capability of the present invention for achieving the above object, is built with the electrode assembly in the inside of the pouch providing a sealed receiving space, in close contact with the inward surface of the pouch In one state, the heat generated from the electrode assembly is absorbed and released to the outside of the pouch, and the support is provided so that the pouch can be placed on a horizontal plane.
아울러, 상기 방열지지부재는; 일정두께를 갖는 플레이트의 형태를 취하며, 상기 파우치의 내향면에 밀착하고 전극조립체에서 발생하는 열을 흡열하는 방열부와, 상기 방열부에 일체를 이루되 방열부에 대해 절곡된 상태를 취하고, 전극조립체의 상기 양극탭 및 음극탭이 위치한 부분의 반대편에 위치하고 전극조립체를 세운 상태로 수평면에 평행을 이루는 지지부를 구비한다.In addition, the heat dissipation support member; It takes the form of a plate having a predetermined thickness, the heat dissipation portion in close contact with the inward surface of the pouch and absorbs heat generated from the electrode assembly, the heat dissipation unit is integral with the heat dissipation unit and bent to the heat dissipation unit, It is provided on the opposite side of the electrode tab and the cathode tab of the electrode assembly is provided with a support that is parallel to the horizontal plane with the electrode assembly upright.
또한, 방열부와 지지부는 직각을 이루고, 상기 지지부에는 지지부와 전극조립체간의 절연을 위한 절연시트가 구비된다.In addition, the heat dissipation portion and the support portion form a right angle, the support portion is provided with an insulating sheet for insulation between the support portion and the electrode assembly.
또한, 상기 방열지지부재는; 상기 전극조립체를 커버하며 파우치의 내향면에 면접하고, 전극조립체에서 발생하는 열을 흡열하는 방열부와, 상기 방열부의 양단부에 일체로 형성되며, 방열부에 대해 절곡된 상태로 전극조립체의 양측부에 대응 위치하고, 전극조립체를 세운 상태로 상기 수평면에 평행을 이루는 지지부로 이루어진다.In addition, the heat dissipation support member; A heat dissipation unit covering the electrode assembly and interviewing the inward side of the pouch, absorbing heat generated from the electrode assembly, and integrally formed at both ends of the heat dissipation unit, and bent to the heat dissipation unit, and being both sides of the electrode assembly. And a support part positioned parallel to the horizontal plane with the electrode assembly standing up.
또한, 상기 방열지지부재는, 구리 또는 알루미늄 또는 HOPG(highly ordered pyrolytic graphite)로 이루어진다.In addition, the heat dissipation supporting member is made of copper or aluminum or HOPG (highly ordered pyrolytic graphite).
도 1은 본 발명의 일 실시예에 따른 자립능력을 갖는 방열지지부재가 구비된 파우치형 이차전지의 분해 사시도이다.1 is an exploded perspective view of a pouch type secondary battery provided with a heat dissipation supporting member having self-supporting ability according to an embodiment of the present invention.
도 2는 상기 도 1에 도시한 방열지지부재를 별도로 도시한 일부 확대 사시도이다.FIG. 2 is a partially enlarged perspective view illustrating the heat dissipation supporting member illustrated in FIG. 1 separately.
도 3은 상기 도 2에 도시한 파우치형 이차전지의 측단면도이다.3 is a side cross-sectional view of the pouch type secondary battery illustrated in FIG. 2.
도 4는 본 발명의 일 실시예에 따른 자립능력을 갖는 방열지지부재가 구비된 파우치형 이차전지의 다른 예를 도시한 절제 사시도이다.Figure 4 is a perspective view showing another example of a pouch-type secondary battery provided with a heat dissipation support member having a self-supporting ability according to an embodiment of the present invention.
도 5는 본 발명의 일 실시예에 따른 자립능력을 갖는 방열지지부재가 구비된 파우치형 이차전지의 또 다른 예를 도시한 분해 사시도이다.5 is an exploded perspective view showing another example of a pouch type secondary battery provided with a heat dissipation supporting member having self-standing ability according to an embodiment of the present invention.
본 발명의 목적, 특정한 장점들 및 신규한 특징들은 첨부된 도면들과 연관되어지는 이하의 상세한 설명과 바람직한 실시예들로부터 더욱 명백해질 것이다.The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.
본 명세서에서 각 도면의 구성요소들에 참조번호를 부가함에 있어서, 동일한 구성요소 들에 한해서는 비록 다른 도면상에 표시되더라도 가능한 한 동일한 번호를 가지도록 하고 있음에 유의하여야 한다.In the present specification, in adding reference numerals to the elements of each drawing, it should be noted that the same elements as possible, even if displayed on different drawings have the same number as possible.
또한, “제 1”, “제 2”, “일측 면”, “타측 면” 등의 용어는, 하나의 구성요소를 다른 구성요소로부터 구별하기 위해 사용되는 것으로, 구성요소가 상기 용어들에 의해 제한되는 것은 아니다. In addition, terms such as “first”, “second”, “one side”, and “other side” are used to distinguish one component from another component, and the component is defined by the terms. It is not limited.
본 발명을 설명함에 있어서, 본 발명의 요지를 불필요하게 흐릴 수 있는 관련된 공지기술에 대한 상세한 설명은 생략한다.In describing the present invention, detailed descriptions of related well-known techniques that may unnecessarily obscure the subject matter of the present invention will be omitted.
이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시형태를 상세히 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명의 일 실시예에 따른 자립능력을 갖는 방열지지부재(19)가 구비된 파우치형 이차전지(11)의 분해 사시도이다.1 is an exploded perspective view of a pouch type secondary battery 11 provided with a heat dissipation supporting member 19 having a self-supporting ability according to an embodiment of the present invention.
도시한 바와같이, 본 실시예에 따른 파우치형 이차전지(11)는, 상호 대응하며 그 테두리부가 면접한 상태로 열융착되어 내부공간(13b)을 제공하는 파우치(12)와, 상기 내부공간(13b)에 밀폐 수납되며 그 일측에 양극탭(17a) 및 음극탭(17b)을 갖는 전극조립체(17)와, 상기 전극조립체(17)와 함께 파우치(12)에 내장되는 방열지지부재(19)로 구성된다.As shown, the pouch type secondary battery 11 according to the present embodiment, the pouch 12 and the inner space corresponding to each other and the heat-sealed in the state that the edge portion is interviewed to provide the inner space (13b), and the inner space ( 13b), the electrode assembly 17 having the positive electrode tab 17a and the negative electrode tab 17b on one side thereof, and the heat dissipation supporting member 19 embedded in the pouch 12 together with the electrode assembly 17. It consists of.
상기 파우치(12)는, 하부파우치편(13)과 상부파우치편(15)으로 이루어지며 내부에 전해액을 함께 수용한다. 상기 하부파우치편(13)의 테두리부에 마련되어 있는 세 개의 융착면(13a)에 상부파우치편(15)의 테두리부를 면접시킨 상태로 융착열을 가하면 상하파우치편(15,17)이 녹아 붙어 일체화 된다.The pouch 12 is composed of a lower pouch piece 13 and an upper pouch piece 15 to accommodate the electrolyte solution therein. When the fusion heat is applied to the three fusion surfaces 13a provided at the edge portions of the lower pouch pieces 13 in a state where the edge portions of the upper pouch pieces 15 are interviewed, the upper and lower pouch pieces 15 and 17 are melted and integrated. do.
상기 전극조립체(17)는, 양극판(17c)과 세퍼레이터(17d)와 음극판(17e)으로 이루어진 적층체를, 권취한 상태로 눌러 내부공간(13b)에 수납될 수 있도록 평평하게 만든 것이다. 본 실시예에서 전극조립체(17)를 젤리롤 타입으로 적용하였지만, 본 실시예의 이차전지에는, 모든 종류의 전극조립체를 얼마든지 적용할 수 있다.The electrode assembly 17 is made to be flat so that it can be accommodated in the inner space 13b by pressing the laminated body composed of the positive electrode plate 17c, the separator 17d, and the negative electrode plate 17e in a wound state. In this embodiment, the electrode assembly 17 is applied in a jelly roll type, but any type of electrode assembly may be applied to the secondary battery of this embodiment.
참고로, 상기 양극판(17c)은 도전성이 우수한 금속박판, 예를 들면 알루미늄 호일의 양면에 활물질을 코팅한 것이다. 상기 활물질은 칼코게나이드(chalcogenide;칼코겐의 이원 화합물) 화합물, 가령 LiCo2, LiMn2O4, LiNiO2, LiNiMnO2 등의 복합 금속산화물이다.For reference, the positive electrode plate 17c is coated with an active material on both sides of a metal thin plate having excellent conductivity, for example, aluminum foil. The active material is a chalcogenide (chalcogenide) compound, for example, a composite metal oxide such as LiCo 2 , LiMn 2 O 4 , LiNiO 2 , LiNiMnO 2, and the like.
상기 음극판(17e)은 구리나 니켈 호일로 이루어진 집전체의 양면에 음극활물질을 코팅한 것이다. 상기 음극활물질로서 탄소계열물질, Si, Sn, 주석옥사이드, 주석합금복합체, 전이금속 산화물 등이 사용된다.The negative electrode plate 17e is coated with a negative electrode active material on both surfaces of a current collector made of copper or nickel foil. Carbon-based materials, Si, Sn, tin oxide, tin alloy composites, transition metal oxides and the like are used as the negative electrode active material.
한편, 상기 방열지지부재(19)는, 일정두께를 갖는 플레이트형 부재로서, 상기 전극조립체(17)의 한쪽 면을 커버하는 방열부(19a)와, 상기 방열부(19a)에 일체를 이루며 전극조립체(17)의 하단부 즉, 상기 양극탭(17a)과 음극탭(17b)이 위치한 부분의 반대편에 위치하는 지지부(19b)로 이루어진다.On the other hand, the heat dissipation support member 19 is a plate-shaped member having a predetermined thickness, the heat dissipation portion 19a covering one side of the electrode assembly 17 and the heat dissipation portion 19a integrally with the electrode It consists of a support 19b which is located at the lower end of the assembly 17, that is, opposite the portion where the positive electrode tab 17a and the negative electrode tab 17b are located.
상기 지지부(19b)는 전극조립체(17)의 하단부에 접한다. 이때 전극조립체(17)와 방열지지부재(19)의 절연을 위해, 지지부(19b)에는 절연시트(19c)가 적층되어 있다. 상기 절연시트(19c)에 대해서는 도 2를 통해 후술하기로 한다.The support 19b is in contact with the lower end of the electrode assembly 17. At this time, in order to insulate the electrode assembly 17 and the heat dissipation support member 19, an insulating sheet 19c is stacked on the support 19b. The insulating sheet 19c will be described later with reference to FIG. 2.
상기 방열지지부재(19)는, 방열부(19a)에 대해 지지부(19b)가 직각으로 절곡되어 대략 ㄱ 자의 측면 형태를 취한다. 특히 도 1에 도시한 방열지지부재(19)는 기본형으로서, 필요에 따라 방열지지부재의 형상을 얼마든지 변경 할 수 있음은 물론이다.The heat dissipation support member 19 is bent at a right angle to the heat dissipation portion 19a at a right angle to have a substantially lateral shape. In particular, the heat dissipation support member 19 shown in FIG. 1 is a basic type, and of course, the shape of the heat dissipation support member can be changed as needed.
아울러 상기 방열지지부재(19)는 어느 정도의 탄성력을 가지며 직각의 각도를 유지한다. 가령 외력을 가하여 방열부(19a)와 지지부(19b)를 벌린 상태에서 힘을 제거하면 처음의 상태로 돌아오는 것이다.In addition, the heat dissipation support member 19 has a certain elastic force and maintains the angle of the right angle. For example, if the force is removed while the heat dissipation unit 19a and the support unit 19b are opened by applying an external force, the initial state is returned.
상기 방열부(19a)는, 상부파우치편(15)의 내향면에 밀착한 상태로 전극조립체(17)의 일측면에 접하여 전극조립체(17)에서 발생하는 열을 모아들여 상부파우치편(15)을 통해 외부로 방출한다. The heat dissipating portion 19a collects heat generated from the electrode assembly 17 in contact with one side surface of the electrode assembly 17 in a state of being in close contact with the inwardly facing surface of the upper pouch piece 15 to collect the upper pouch piece 15. Release through the outside.
상기 방열부(19a)를 전극조립체(17)에 완전히 밀착시킬 수 도 있고, 어느 정도 간극을 두어 방열부(19a)와 전극조립체(17) 사이에 전해액이 들어차 있게 할 수 도 있다.The heat dissipation unit 19a may be brought into close contact with the electrode assembly 17, or an electrolyte may be filled between the heat dissipation unit 19a and the electrode assembly 17 with a gap therebetween.
상기 지지부(19b)는 방열부(19a)를 세워 놓을 수 있도록 적용된 것이다. 이를테면 도 3에 도시한 바와같이, 상기 지지부(19b)를 수평면상에 올리면 방열부(19a)가 수직으로 세워지는 것이다. 상기 지지부(19b)는 전극조립체(17)의 하단부와 하부파우치편(13)의 내벽면(13c) 사이에 끼워지며, 내벽면(13c)에 대해서는 밀착한다.The support 19b is applied to put the heat radiating portion 19a upright. For example, as shown in FIG. 3, when the support 19b is placed on a horizontal plane, the heat radiating portion 19a is erected vertically. The support portion 19b is fitted between the lower end portion of the electrode assembly 17 and the inner wall surface 13c of the lower pouch piece 13 and is in close contact with the inner wall surface 13c.
상기 구성을 갖는 방열지지부재(19)는 일체형으로서, 구리 또는 알루미늄을 포함한 전도성금속류 또는 HOPG(highly ordered pyrolytic graphite)등으로 제작할 수 있다.The heat dissipation support member 19 having the above-described configuration may be made of a conductive metal such as copper or aluminum, or a highly ordered pyrolytic graphite (HOPG).
도 2는 상기 도 1에 도시한 방열지지부재(19)를 별도로 도시한 일부 확대 사시도이다.FIG. 2 is a partially enlarged perspective view of the heat dissipation support member 19 illustrated in FIG. 1 separately.
도시한 바와같이, 상기 방열부(19a)와 지지부(19b)가 직각의 사이각을 가지도록 절곡되어 있다. 상기 지지부(19b)에 대한 방열부(19a)의 사이각은 지지부(19b)의 폭(w)에 따라 달라질 수 있다. 가령 85° 내지 90°의 각도 범위로 형성될 수 있다.As shown in the figure, the heat radiating portion 19a and the supporting portion 19b are bent to have a right angle. The angle between the heat dissipation unit 19a with respect to the support unit 19b may vary depending on the width w of the support unit 19b. For example, it may be formed in an angle range of 85 ° to 90 °.
아울러 상기 지지부(19b)의 도면상 상면에는 절연시트(19c)가 적층되어 있다. 상기 절연시트(19c)는 전극조립체(17)에 대한 지지부(19b)의 절연을 위한 것으로서, 세퍼레이터(17d)와 같은 재질을 가질 수 있다. 경우에 따라 전해액에 내성을 갖는 고무나 실리콘 등의 합성수지를 적용할 수 도 있다.In addition, an insulating sheet 19c is laminated on the upper surface of the support part 19b. The insulating sheet 19c is to insulate the support 19b from the electrode assembly 17 and may have the same material as the separator 17d. In some cases, a synthetic resin such as rubber or silicone, which is resistant to the electrolyte, may be applied.
도 3은 상기 도 2에 도시한 파우치형 이차전지(11)의 측단면도이다.3 is a side cross-sectional view of the pouch type secondary battery 11 illustrated in FIG. 2.
무엇보다 본 실시예에 따른 파우치형 이차전지(11)는, 파우치(12)의 내부에 방열지지부재(19)가 내장되어, 이차전지(11)를 외부의 대상물 위에 세워 놓을 수 있다는 특징을 갖는다. 세워 놓는다는 의미는 외부의 대상물과 이차전지의 양측부 또는 하단부(전극이 위치한 부분의 반대편) 가 면접한다는 의미이기도 한다. Above all, the pouch-type secondary battery 11 according to the present embodiment has a feature in that the heat dissipation support member 19 is built into the pouch 12 so that the secondary battery 11 can be placed on an external object. . To stand up also means that the external object and the side or the bottom of the secondary battery (the opposite side where the electrode is located) interview.
상기와 같이 대상물과 이차전지가 면접하므로, 상기 대상물로서 수냉식냉각부(27)를 적용할 경우, 전극조립체(17)에서 발생한 열은 수냉식냉각부(27)로 빠르게 전달되어 소멸된다.Since the object and the secondary battery are interviewed as described above, when the water-cooled cooling unit 27 is applied as the object, heat generated in the electrode assembly 17 is quickly transferred to the water-cooled cooling unit 27 and disappeared.
수냉식냉각부(27)에 이차전지(11)를 눕힐 경우 더욱 빠르게 방열할 수 있겠으나, 다수의 이차전지(11)를 패키지화하기 위해서는, 이차전지(11)를 눕힐 수 없다.When the secondary battery 11 is laid down on the water cooling unit 27, heat dissipation may be faster. However, in order to package a plurality of secondary batteries 11, the secondary battery 11 may not be laid down.
여하튼, 상기 전극조립체(17)에서 발생한 열은 방열지지부재(19)로 흡수되어, 일부는 하부로 이동하여 지지부(19b)에 도달한 후 파우치를 통해 수냉식냉각부(27)로 흘러 제거되고, 나머지는 방열부(19a)에서 하부파우치편(13)을 통해 공기중으로 방출된다. In any case, the heat generated from the electrode assembly 17 is absorbed by the heat dissipation support member 19, and a part of the heat is transferred to the water-cooled cooling part 27 through the pouch after reaching the support 19b, The rest is discharged into the air through the lower pouch piece 13 from the heat radiating portion 19a.
도 4는 본 발명의 일 실시예에 따른 자립능력을 갖는 방열지지부재가구비된 구비된 파우치형 이차전지의 다른 예를 도시한 절제 사시도이다.Figure 4 is a perspective view showing another example of a pouch-type secondary battery provided with a heat dissipation support member having a self-supporting ability according to an embodiment of the present invention.
상기한 도면부호와 동일한 도면부호는 동일한 기능의 동일한 부재를 가리킨다.The same reference numerals as the above reference numerals denote the same members having the same function.
도시한 바와같이, 본 실시예에 따른 이차전지(11)에는, 대략 ㄷ 자의 형태를 취하는 방열지지부재(25)가 적용되어 있다. As shown in the drawing, the secondary battery 11 according to the present embodiment has a heat dissipation supporting member 25 having a shape of approximately c.
상기 방열지지부재(25)는, 일정두께를 갖는 플레이트의 형태를 취하며, 전극조립체(17)의 일측면에 접하는 방열부(25a)와, 상기 방열부(25a)의 양단에 절곡 형성된 지지부(25b)로 이루어진다. 상기 지지부(25b)는 이차전지(11)를 수평면상에 옆으로 세워 놓을 수 있도록 어느 정도의 면적을 가지며 평평한 상태이다. 또한 상기 방열부(25a)에 대한 각 지지부(25b)의 사이각은 도 2에 설명한 방열지지부재와 같다.The heat dissipation support member 25 has a shape having a predetermined thickness, and includes a heat dissipation portion 25a contacting one side surface of the electrode assembly 17 and support portions formed at both ends of the heat dissipation portion 25a. 25b). The support part 25b is flat and has a certain area so that the secondary battery 11 can be placed sideways on a horizontal plane. In addition, the angle between each support portion 25b with respect to the heat radiation portion 25a is the same as the heat radiation support member described with reference to FIG. 2.
특히 상기 지지부(25b)는, 하부파우치편(13)과 상부파우치편(15)의 융착부에 물려 있다. 이와같이 절곡된 지지부(25b)를 융착부로 감싸 구성함으로서 이차전지(11)를 옆으로 세울 때 융착부가 방해되지 않는다.In particular, the support portion 25b is bitten by the fusion between the lower pouch piece 13 and the upper pouch piece 15. The bent portion is not disturbed when the secondary battery 11 is set to the side by surrounding the bent support portion 25b with the fusion portion.
상기 방열부(25a)는, 하부파우치편(13)에 밀착한 상태로 전극조립체(17)를 커버하여 전극조립체(17)로부터 흡열한 열을 하부파우치편(13)을 통해 외부로 방출하거나 양단의 지지부(25b)로 보낸다. The heat dissipation unit 25a covers the electrode assembly 17 in close contact with the lower pouch piece 13 to release heat absorbed from the electrode assembly 17 to the outside through the lower pouch piece 13, or both ends thereof. To the support 25b.
상기한 바와같이 도 4에 도시한 타입의 이차전지(11)는, 지지부(25b)가 전극조립체(17)의 양측부에 위치하므로 옆으로 세워 배치할 수 있다. 즉 (패키지를 구성하기 위하여) 수냉식냉각부(27)상에 다수의 이차전지(11)를 세팅할 때, 양측 지지부(25b) 중 어느 하나의 지지부(25b)가 파우치를 사이에 두고 수냉식냉각부(27)에 간접적으로 접하도록 하는 것이다.As described above, the secondary battery 11 of the type shown in FIG. 4 may be disposed side by side since the supporting portion 25b is located at both sides of the electrode assembly 17. That is, when setting the plurality of secondary batteries 11 on the water cooling part 27 (to construct a package), the water cooling part with one support part 25b of the two support parts 25b sandwiched between the pouches. Indirect contact with (27).
상기 방열지지부재(25)의 재질은 도 1의 방열지지부재(19)와 동일하다.The material of the heat dissipation support member 25 is the same as that of the heat dissipation support member 19 of FIG. 1.
도 5는 본 발명의 일 실시예에 따른 자립능력을 갖는 방열지지부재가 구비된 파우치형 이차전지의 또 다른 예를 도시한 분해 사시도이다.5 is an exploded perspective view showing another example of a pouch type secondary battery provided with a heat dissipation supporting member having self-standing ability according to an embodiment of the present invention.
도 5에 도시한 전극조립체(17)는 양극탭(17a)과 음극탭(17b)이 반대편에 위치한 타입의 조립체이다. 상기한 바와같이, 본 실시예에 따른 이차전지에 적용될 수 있는 전극조립체의 형식은 정해지지 않는다. The electrode assembly 17 shown in FIG. 5 is an assembly of the type in which the positive electrode tab 17a and the negative electrode tab 17b are located on opposite sides. As described above, the type of the electrode assembly which can be applied to the secondary battery according to the present embodiment is not determined.
여하튼, 상기 파우치(12)가 제공하는 내부공간(13b)에 전극조립체(17)와 방열지지부재(19)가 내장된다. 상기 방열지지부재(19)는 도 2에 도시한 타입과 같은 것으로서 ㄴ 자로 절곡되어 방열부(19a)와 지지부(19b)를 갖는다. 상기 지지부(19b)는 평활한 직사각형 부분으로서 하부파우치편(13)의 일측 내벽면에 접하며 이차전지(11)를 수냉식냉각부(27) 위에 세웠을 때 이차전지가 서 있을 수 있도록 한다.In any case, the electrode assembly 17 and the heat dissipation supporting member 19 are embedded in the inner space 13b provided by the pouch 12. The heat dissipation support member 19 is the same as the type shown in FIG. 2 and is bent by a letter B to have a heat dissipation portion 19a and a support portion 19b. The support 19b is a flat rectangular portion that contacts one inner wall surface of the lower pouch piece 13 so that the secondary battery can stand when the secondary battery 11 is placed on the water cooling unit 27.
이상, 본 발명을 구체적인 실시예를 통하여 상세하게 설명하였으나, 이는 본 발명의 구체적으로 설명하기 위한 것으로, 본 발명은 이에 한정되지 않으며, 본 발명의 기술적 사상 내에서 당 분야의 통상의 지식을 가진 자에 의해 그 변형이나 개량이 가능함이 명백하다.As mentioned above, the present invention has been described in detail through specific embodiments, which are intended to specifically describe the present invention, but the present invention is not limited thereto, and one having ordinary skill in the art within the technical idea of the present invention. It is apparent that the deformation and improvement can be made by.
본 발명의 단순한 변형 내지 변경은 모두 본 발명의 영역에 속하는 것으로, 본 발명의 구체적인 보호 범위는 첨부된 특허청구범위에 의하여 명확해질 것이다.All modifications and variations of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be apparent from the appended claims.
[부호의 설명][Description of the code]
11:이차전지 11: rechargeable battery
12:파우치12: porch
13:하부파우치편 13: Bottom pouch
13a:융착면13a: fusion surface
13b:내부공간 13b: inner space
13c:내벽면13c: inner wall
15:상부파우치편 15: upper porch
17:전극조립체17: electrode assembly
17a:양극탭 17a: anode tap
17b:음극탭17b: negative electrode tap
17c:양극판 17c: anode plate
17d:세퍼레이터17d: separator
17e:음극판 17e: cathode plate
19:방열지지부재19: heat dissipation support member
19a:방열부 19a: radiator
19b:지지부19b: support
19c:절연시트 19c: Insulation sheet
25:방열지지부재25: heat dissipation support member
25a:방열부 25a: radiator
25b:지지부25b: support
27:수냉식냉각부27: water cooling cooling unit

Claims (13)

  1. 상호 대응하는 파우치편의 테두리부를 면접시킨 상태로 면접부위를 융착 결합하여 융착부의 내측 영역에 밀폐된 수용공간을 제공하는 파우치와;A pouch for fusion-bonding the interview portions in a state where the edge portions of the corresponding pouch pieces are interviewed to provide a sealed space in the inner region of the fusion portion;
    상기 파우치의 수용공간 내에 전해액과 함께 수용되며 파우치 외부로 연장된 양극탭 및 음극탭을 갖는 전극조립체와;An electrode assembly accommodated together with an electrolyte in the accommodating space of the pouch and having a positive electrode tab and a negative electrode tab extending out of the pouch;
    상기 파우치에 내장되되, 파우치편의 내향면에 밀착한 상태로 전극조립체로부터 발생하는 열을 흡열하여 파우치 외부로 배출함과 동시에 전극조립체가 내장된 파우치를 수평면상에 세워 놓을 수 있도록 지지력을 제공하는 방열지지부재를 구비한 자립형 방열지지부재를 구비한 파우치형 이차전지.Heat dissipation, which is built into the pouch, absorbs heat generated from the electrode assembly in close contact with the inward surface of the pouch piece and discharges it to the outside of the pouch, and provides support to allow the pouch containing the electrode assembly to stand on a horizontal plane. Pouch type secondary battery having a self-supporting heat dissipation support member having a support member.
  2. 제 1항에 있어서,The method of claim 1,
    상기 방열지지부재는;The heat dissipation support member;
    일정두께의 플레이트의 형태를 취하며 적어도 두 면 이상이 전극조립체에 대향하도록 절곡되어 있는 방열지지부재인 파우치형 이차전지.A pouch type secondary battery that is a heat dissipation supporting member that takes the form of a plate having a predetermined thickness and is bent so that at least two surfaces thereof face the electrode assembly.
  3. 제 2항에 있어서,The method of claim 2,
    상기 방열지지부재는;The heat dissipation support member;
    상기 전극조립체를 커버하며 파우치의 내향면에 면접하고, 전극조립체에서 발생하는 열을 흡열하여 파우치 외부로 방출하는 방열부와,A heat dissipation unit covering the electrode assembly and interviewing the inner surface of the pouch, absorbing heat generated from the electrode assembly, and dissipating the heat to the outside of the pouch;
    상기 방열부에 일체를 이루며 직각으로 절곡된 상태를 취하고, 전극조립체의 양극탭 및 음극탭이 위치한 부분의 반대편에 위치하는 지지부를 갖는 파우치형 이차전지.Pouch type secondary battery having a support unit which is formed integrally with the heat dissipating portion and bent at a right angle, and positioned opposite to a portion where the positive electrode tab and the negative electrode tab are located.
  4. 제 3항에 있어서,The method of claim 3, wherein
    상기 지지부에는, 지지부와 전극조립체간의 절연을 위한 절연시트가 더 구비된 파우치형 이차전지.The support portion, pouch type secondary battery further provided with an insulating sheet for insulating between the support and the electrode assembly.
  5. 제 2항에 있어서,The method of claim 2,
    상기 방열지지부재는;The heat dissipation support member;
    상기 전극조립체를 커버하며 파우치의 내향면에 밀착하고, 전극조립체에서 발생하는 열을 흡열하여 파우치 외부로 방출하는 방열부와,A heat dissipation unit covering the electrode assembly and in close contact with an inner surface of the pouch, absorbing heat generated from the electrode assembly, and dissipating the heat to the outside of the pouch;
    상기 방열부의 양단부에 일체로 형성되며 방열부에 대해 절곡된 상태로 전극조립체의 양측부에 대응 위치하는 지지부로 이루어진 파우치형 이차전지.A pouch type secondary battery, which is integrally formed at both ends of the heat dissipation unit, and includes a support unit corresponding to both sides of the electrode assembly in a bent state with respect to the heat dissipation unit.
  6. 제 2항에 있어서,The method of claim 2,
    상기 방열지지부재는,The heat dissipation support member,
    구리 또는 알루미늄으로 이루어진 파우치형 이차전지.Pouch type secondary battery made of copper or aluminum.
  7. 제 2항에 있어서,The method of claim 2,
    상기 방열지지부재는;The heat dissipation support member;
    HOPG(highly ordered pyrolytic graphite)로 이루어진 파우치형 이차전지.Pouch type secondary battery made of HOPG (highly ordered pyrolytic graphite).
  8. 밀폐된 수용공간을 제공하는 파우치의 내부에 전극조립체와 함께 내장되는 것으로서, 상기 파우치의 내향면에 밀착한 상태로, 전극조립체로부터 발생하는 열을 흡열하여 파우치 외부로 방출함과 아울러 파우치를 수평면에 대해 세워 놓을 수 있도록 지지력을 제공하는 자립능력을 갖는 파우치형 이차전지용 방열지지부재.It is embedded together with the electrode assembly inside the pouch providing a sealed accommodation space, in close contact with the inward surface of the pouch, absorbs heat generated from the electrode assembly to the outside of the pouch and releases the pouch on a horizontal plane. A heat dissipation support member for pouch type secondary batteries having a self-supporting ability to provide support to stand up against.
  9. 제 8항에 있어서,The method of claim 8,
    상기 방열지지부재는; The heat dissipation support member;
    일정두께를 갖는 플레이트의 형태를 취하며,Take the form of a plate with a certain thickness,
    상기 파우치의 내향면에 밀착하고 전극조립체에서 발생하는 열을 흡열하는 방열부와,A heat dissipation unit in close contact with an inner surface of the pouch and absorbing heat generated from the electrode assembly;
    상기 방열부에 일체를 이루되 방열부에 대해 절곡된 상태를 취하고, 전극조립체의 상기 양극탭 및 음극탭이 위치한 부분의 반대편에 위치하고 전극조립체를 세운 상태로 수평면에 평행을 이루는 지지부를 구비한 자립능력을 갖는 파우치형 이차전지용 방열지지부재.Self-supporting unit which is integral with the heat dissipation unit and takes a bent state with respect to the heat dissipation unit, and is positioned opposite to the portion where the positive electrode tab and the negative electrode tab are located, and has a support unit parallel to the horizontal plane with the electrode assembly upright. Heat dissipation support member for pouch type secondary battery having capability.
  10. 제 9항에 있어서,The method of claim 9,
    방열부와 지지부는 직각을 이루고,The heat dissipation part and the support part make a right angle,
    상기 지지부에는 지지부와 전극조립체간의 절연을 위한 절연시트가 구비된 자립능력을 갖는 파우치형 이차전지용 방열지지부재.The support part has a heat dissipation support member for a pouch type secondary battery having a self-supporting ability is provided with an insulating sheet for insulation between the support and the electrode assembly.
  11. 제 8항에 있어서,The method of claim 8,
    상기 방열지지부재는;The heat dissipation support member;
    상기 전극조립체를 커버하며 파우치의 내향면에 면접하고, 전극조립체에서 발생하는 열을 흡열하는 방열부와,A heat dissipation unit covering the electrode assembly and interviewing the inward surface of the pouch and absorbing heat generated from the electrode assembly;
    상기 방열부의 양단부에 일체로 형성되며, 방열부에 대해 절곡된 상태로 전극조립체의 양측부에 대응 위치하고, 전극조립체를 세운 상태로 상기 수평면에 평행을 이루는 지지부로 이루어진 자립능력을 갖는 파우치형 이차전지용 방열지지부재.It is formed integrally at both ends of the heat dissipation unit, and corresponding to both sides of the electrode assembly in a bent state with respect to the heat dissipation unit, the pouch type secondary battery having a self-supporting ability consisting of a support portion parallel to the horizontal plane with the electrode assembly upright Heat dissipation support member.
  12. 제 8항에 있어서,The method of claim 8,
    상기 방열지지부재는,The heat dissipation support member,
    구리 또는 알루미늄으로 이루어진 자립능력을 갖는 파우치형 이차전지용 방열지지부재.A heat dissipation support member for a pouch type secondary battery having self-supporting ability made of copper or aluminum.
  13. 제 8항에 있어서,The method of claim 8,
    상기 방열지지부재는;The heat dissipation support member;
    HOPG(highly ordered pyrolytic graphite)로 이루어진 자립능력을 갖는 파우치형 이차전지용 방열지지부재.A heat dissipation support member for a pouch type secondary battery having a self-supporting ability consisting of HOPG (highly ordered pyrolytic graphite).
PCT/KR2014/000149 2013-01-07 2014-01-07 Heat dissipation supporting member, having self-supporting capacity, for pouch-type secondary battery and pouch-type secondary battery comprising same WO2014107093A1 (en)

Applications Claiming Priority (2)

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KR1020130001602A KR20140090335A (en) 2013-01-07 2013-01-07 Pouch-type secondary battery with self-standing and heat dissipating capability and Supporting means for the same
KR10-2013-0001602 2013-01-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017041575A (en) * 2015-08-21 2017-02-23 太陽誘電株式会社 Electrochemical device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101999758B1 (en) * 2015-06-02 2019-07-12 주식회사 엘지화학 Secondary Battery
WO2017086593A1 (en) * 2015-11-18 2017-05-26 주식회사 엘지화학 Sealing device for secondary battery
KR101925090B1 (en) 2015-11-18 2018-12-04 주식회사 엘지화학 Sealing apparatus of secondary battery
KR20220015252A (en) 2020-07-30 2022-02-08 주식회사 엘지에너지솔루션 Pouch-type Battery Cell Comprising Elastic Member and Battery Pack Comprising the Same
KR20230019358A (en) * 2021-07-30 2023-02-08 삼성전자주식회사 Electronic device including battery

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060102207A (en) * 2005-03-23 2006-09-27 에스케이 주식회사 Case for high power rechargeable lithium battery
KR100870355B1 (en) * 2007-07-19 2008-11-25 삼성에스디아이 주식회사 Pouch type battery pack
KR20110082745A (en) * 2010-01-12 2011-07-20 삼성에스디아이 주식회사 Secondary battery
KR20110126764A (en) * 2010-05-18 2011-11-24 주식회사 엘지화학 Cooling member of compact structure and excellent stability and battery module employed with the same
US20120301777A1 (en) * 2011-05-25 2012-11-29 Chang-Bum Ahn Secondary battery

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060102207A (en) * 2005-03-23 2006-09-27 에스케이 주식회사 Case for high power rechargeable lithium battery
KR100870355B1 (en) * 2007-07-19 2008-11-25 삼성에스디아이 주식회사 Pouch type battery pack
KR20110082745A (en) * 2010-01-12 2011-07-20 삼성에스디아이 주식회사 Secondary battery
KR20110126764A (en) * 2010-05-18 2011-11-24 주식회사 엘지화학 Cooling member of compact structure and excellent stability and battery module employed with the same
US20120301777A1 (en) * 2011-05-25 2012-11-29 Chang-Bum Ahn Secondary battery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017041575A (en) * 2015-08-21 2017-02-23 太陽誘電株式会社 Electrochemical device

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