WO2018052186A1 - Secondary battery - Google Patents

Secondary battery Download PDF

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Publication number
WO2018052186A1
WO2018052186A1 PCT/KR2017/007702 KR2017007702W WO2018052186A1 WO 2018052186 A1 WO2018052186 A1 WO 2018052186A1 KR 2017007702 W KR2017007702 W KR 2017007702W WO 2018052186 A1 WO2018052186 A1 WO 2018052186A1
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WO
WIPO (PCT)
Prior art keywords
insulating member
secondary battery
hole
electrode assembly
plate
Prior art date
Application number
PCT/KR2017/007702
Other languages
French (fr)
Korean (ko)
Inventor
이현수
Original Assignee
삼성에스디아이(주)
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Filing date
Publication date
Application filed by 삼성에스디아이(주) filed Critical 삼성에스디아이(주)
Publication of WO2018052186A1 publication Critical patent/WO2018052186A1/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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/383—Flame arresting or ignition-preventing means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/154—Lid or cover comprising an axial bore for receiving a central current collector
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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

  • An embodiment of the present invention relates to a secondary battery.
  • the secondary battery Unlike the primary battery, the secondary battery repeatedly performs charging and discharging.
  • small-capacity secondary batteries are used in small electronic devices that can be carried, such as mobile phones, laptops, camcorders, etc.
  • large-capacity secondary batteries can be used in electric vehicles.
  • Such secondary batteries include, for example, an electrode assembly having a charge / discharge function, a case accommodating the electrode assembly, and a cap assembly coupled to the case to prevent detachment of the electrode assembly.
  • gas may be generated by the reaction of the active material, the electrolyte, and the like in the secondary battery.
  • the internal pressure thereof may increase and an explosion may occur.
  • the flame may be emitted to the outside according to the explosion.
  • An embodiment of the present invention provides a secondary battery capable of suppressing a flame generated therein.
  • a secondary battery is composed of an electrode assembly, a case accommodating the electrode assembly, a cap plate coupled to the case and sealed, an insulating material, and installed between the electrode assembly and the cap plate.
  • the insulating member may be coupled to cover at least a portion of one surface close to the electrode assembly of the flame suppression member.
  • the insulating member may be coupled to cover at least a portion of one surface close to the cap plate of the flame suppression member.
  • the insulating member may be coupled to cover at least a portion of one surface close to the electrode assembly and at least a portion of the other surface close to the cap plate among the flame suppression members.
  • insulation member and the flame suppression member may be manufactured together by insert injection molding.
  • a plurality of holes of the insulating member may be arranged to be spaced apart from each other.
  • the insulating member may be formed in a substantially rectangular or oval shape, and each hole of the insulating member may be formed to extend along a short axis direction thereof, and may be arranged to be spaced apart from each other along the long axis direction.
  • the insulating member may be formed in a substantially rectangular or elliptical shape, and each hole of the insulating member may be formed to extend along the major axis direction thereof, and may be arranged to be spaced apart from each other along the minor axis direction.
  • the insulating member may be formed in a substantially rectangular or oval shape, and each of the holes of the insulating member may be arranged to be spaced apart from each other along its short axis direction and long axis direction.
  • the insulating member may be formed in a substantially rectangular or oval shape, and each of the holes of the insulating member may be arranged to be spaced apart from each other with respect to at least one of the short axis direction and the long axis direction.
  • the hole of the insulating member may be formed so as to penetrate in a direction substantially parallel to a direction from one side where the electrode assembly is disposed to the other side where the cap plate is disposed.
  • the flame suppression member may be made of a heat resistant material.
  • the flame suppression member may be made of a material including at least one of stainless steel or polyphenylene sulfide.
  • the flame suppression member may be manufactured in the form of a mesh.
  • a flame suppression member is provided between the electrode assembly and the cap assembly, thereby suppressing the flame from being blown out of the secondary battery or suppressing the size of the flame and preventing the flame from being further amplified.
  • a secondary battery Provided is a secondary battery.
  • the insulating member is formed to cover at least a portion of the flame suppression member, thereby providing a secondary battery capable of preventing a short circuit caused by the flame suppression member.
  • FIG. 1 is a perspective view illustrating a rechargeable battery according to an exemplary embodiment of the present invention.
  • FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1.
  • FIG. 3 is a plan view illustrating a top insulator of a rechargeable battery according to an exemplary embodiment of the present invention.
  • FIG. 4 is a cross-sectional view illustrating a rechargeable battery according to another exemplary embodiment of the present invention.
  • FIG. 5 is a cross-sectional view of a rechargeable battery according to still another exemplary embodiment of the present invention.
  • FIG. 6 to 8 are plan views illustrating top insulators of a rechargeable battery according to another exemplary embodiment of the present invention, respectively.
  • first, second, etc. are used herein to describe various members, parts, regions, layers, and / or parts, these members, parts, regions, layers, and / or parts are defined by these terms. It is obvious that not. These terms are only used to distinguish one member, part, region, layer or portion from another region, layer or portion. Thus, the first member, part, region, layer or portion described below may refer to the second member, component, region, layer or portion without departing from the teachings of the present invention.
  • FIG. 1 is a perspective view illustrating a rechargeable battery 100 according to an exemplary embodiment of the present invention
  • FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1.
  • the secondary battery 100 includes an electrode assembly 110, a first current collecting plate 121, a second current collecting plate 122, a case 130, a cap assembly 140, and a top insulator 150. ).
  • the electrode assembly 110 is formed by winding or overlapping a laminate formed of a first electrode plate 111, a separator 113, and a second electrode plate 112 formed in a thin plate shape or a rod shape in the form of a jelly roll. Can be.
  • the first electrode plate 111 may be a positive electrode plate, and the second electrode plate 112 may be a negative electrode plate.
  • the first electrode plate 111 may be a negative electrode plate, and the second electrode plate 112 may be a positive electrode plate.
  • the first electrode plate 111 may be formed by applying a first electrode active material to a first electrode current collector such as a metal foil. If the first electrode plate is a positive electrode plate, the first electrode current collector may be made of aluminum, and the first electrode active material may be made of lithium oxide. However, the material is only a mere example, and the first electrode plate 111 of the present invention is not limited to the material. On the other hand, the first electrode plate 111a, which is a region where the first electrode active material is not coated, is formed on the first electrode plate 111 together. The first electrode supporting portion 111a serves as a passage for the current to flow between the first electrode plate 111 and the outside thereof.
  • the second electrode plate 112 may also be formed by applying a second electrode active material to a second electrode current collector such as a metal foil. If the second electrode plate 112 is a negative electrode plate, the second electrode current collector may be made of nickel or copper, and the second electrode active material may be made of graphite or carbon. However, the material is merely a mere example, and the second electrode plate 112 of the present invention is not limited to the material. On the other hand, in the second electrode plate 112, the second electrode uncoated portion 112a, which is a region where the second electrode active material is not coated, is formed. The second electrode supporting portion 112a serves as a passage for the current to flow between the second electrode plate 112 and the outside thereof.
  • the separator 113 is disposed between the first electrode plate 111 and the second electrode plate 112 to prevent the first electrode plate 111 and the second electrode plate 112 from being in contact with each other. prevent.
  • the separator 113 serves as a passage for moving lithium ions, for example.
  • Such a separator may be made of polyethylene (PE), polypropylene (PP), or a composite film of polyethylene and polypropylene.
  • the material is merely an example, and the separator 113 of the present invention is not limited to being made of only the material.
  • the first collector plate 121 and the second collector plate 122 which are electrically connected to the first electrode plate 111 and the second electrode plate 112, are respectively coupled to both ends of the electrode assembly 110. .
  • the first current collecting plate 121 is made of a conductive material such as aluminum, and is electrically connected to the first electrode plate 111 by contacting the first electrode supporting portion 111a protruding to one end of the electrode assembly 110. .
  • the second current collecting plate 122 is made of a conductive material such as nickel or copper, and is in contact with the second electrode plate 112 by contacting the second electrode uncoated portion 112a protruding to the other end of the electrode assembly 110. Connected.
  • the material is just a simple example, and the first collector plate 121 and the second collector plate 122 of the present invention are not limited to the material.
  • the case 130 is formed of a substantially hexahedron, and an opening for inserting the electrode assembly 110, the first collector plate 121, and the second collector plate 122 may be formed on one surface thereof.
  • the case 130 may be formed of a cylinder or other polyhedron.
  • the case 130 will be described with an example of forming a rectangular parallelepiped as shown in FIG. 1.
  • the opening is not shown because the case 130 and the cap assembly 140 are shown coupled, but the opening may correspond to a portion corresponding to the circumference of the cap assembly 140. will be.
  • the inner surface of the case 130 may be insulated to be insulated from the electrode assembly 110, the first current collecting plate 121, and the second current collecting plate 122.
  • the cap assembly 140 is coupled to the case 130.
  • the cap assembly 140 includes a cap plate 141, a first electrode terminal 142, a first terminal plate 143, a second electrode terminal 144, a second terminal plate 145, and a first gasket 146. , A second gasket 147, an injection stopper 148, and a vent plate 149.
  • the cap plate 141 seals the opening of the case 130, so that the electrode assembly 110, the first current collecting plate 121, and the second current collecting plate 122 accommodated in the case 130 are separated out of the case 130. Prevent it.
  • the cap plate 141 may have a first terminal hole 141a, a second terminal hole 141b, an electrolyte injection hole 141c, and a vent hole 141c.
  • the first terminal hole 141a and the second terminal hole 141b are portions through which the first electrode terminal 142 and the second electrode terminal 144 to be described later are respectively installed.
  • the first terminal hole 141a and the second terminal hole 141b may be formed to correspond to the diameters of the first electrode terminal 142 and the second electrode terminal 144, respectively.
  • the first gasket 146 and the second gasket 147 which will be described later, may be formed to be slightly larger than the diameters of the first electrode terminal 142 and the second electrode terminal 144, respectively, in order to provide a space to be installed. have.
  • the electrolyte injection hole 141c is a portion for injecting electrolyte into the case 130 and the cap assembly 140 in a state in which they are coupled to each other.
  • the electrolyte serves as a medium for moving lithium ions, for example, during charging / discharging of the secondary electrode 100.
  • Such electrolytes include, for example, organic solvents such as ethylene carbonate (EC), propylene carbonate (Propylene Carbonate (PC)), diethyl carbonate (Diethyl Carbonate (DEC)), dimethyl carbonate (Dimethyl Carbonate, DMC) and lithium hexafluorophosphate ( LiPF 6 ), lithium tetrafluoroborate (LiBF 4 ) and the like may be formed in a liquid, solid or gel form.
  • organic solvents such as ethylene carbonate (EC), propylene carbonate (Propylene Carbonate (PC)), diethyl carbonate (Diethyl Carbonate (DEC)), dimethyl carbonate (Dimethyl Carbonate, DMC) and lithium hexafluorophosphate ( LiPF 6 ), lithium tetrafluoroborate (LiBF 4 ) and the like may be formed in a liquid, solid or gel form.
  • the vent hole 141c is a portion for discharging gas generated inside the secondary battery 100 to the outside thereof.
  • the first electrode terminal 142 may be formed in a bar shape and installed to penetrate the cap plate 141. At this time, one end of the first electrode terminal 142 facing the inside of the case 130, that is, one end disposed under the cap plate 141 is electrically connected to the first current collecting plate 121. In addition, a flange 142a may be formed at one end of the first electrode terminal 142 in a direction crossing the longitudinal direction so that the first electrode terminal 142 does not separate upward from the cap plate 141. Meanwhile, the other end of the first electrode terminal 142 exposed to the upper portion of the cap plate 141 may be coupled to the first terminal plate 143 in a riveted form.
  • the second electrode terminal 144 may also be formed in a bar shape and installed to penetrate the cap plate 141. At this time, one end of the second electrode terminal 144 disposed under the cap plate 141 is electrically connected to the second current collecting plate 122. In addition, a flange 144a may be formed at one end of the second electrode terminal 144 in a direction crossing the longitudinal direction so that the second electrode terminal 144 does not escape upward from the cap plate 141. Meanwhile, the other end of the second electrode terminal 144 exposed to the upper portion of the cap plate 141 may also be coupled to the second terminal plate 145 in a riveted form.
  • the first gasket 146 is made of an insulating material, and is installed between the cap plate 141 and the first electrode terminal 142 and between the cap plate 141 and the first terminal plate 143 to form the cap plate 141. And insulate the first electrode terminal 142, the cap plate 141, and the first terminal plate 143.
  • the second gasket 147 is also made of an insulating material, and is installed between the cap plate 141 and the second electrode terminal 144 and between the cap plate 141 and the second terminal plate 145, and thus the cap plate 141. And insulate the second electrode terminal 144, the cap plate 141, and the second terminal plate 145.
  • first gasket 146 and the second gasket 147 tightly seal the first terminal hole 141a and the second terminal hole 141b, and moisture or various foreign matters may be removed from the outside of the secondary battery 100. It may also prevent the penetration into the interior, or may prevent the electrolyte or the like from flowing out of the secondary battery 100 to the outside.
  • the injection plug 148 is inserted into the electrolyte injection hole 141c in order to prevent the electrolyte from flowing out after injecting the electrolyte into the case 130 through the electrolyte injection hole 141c of the cap plate 141. This serves to seal it tightly.
  • the vent plate 149 is installed at a point corresponding to the vent hole 141c of the cap plate 141.
  • the secondary battery 100 may generate heat and gas therein due to overcharging or various abnormal operations. Accordingly, when the internal pressure of the secondary battery 100 is higher than a predetermined pressure, the vent plate 149 may have a case 130. B by cutting and opening earlier than the other parts of the cap plate 141, it serves to prevent the unintentional explosion and to discharge the gas to the outside. At this time, the vent plate 149 may be formed with a notch 149a having a specific shape in order to more secure the cutting.
  • the vent plate 149 may efficiently discharge simple gas, but there is a limit that the vent plate 149 may not actively cope with the flame generated due to the temperature rise inside the secondary battery 100. Rather, the flame may be blown out through a gap cut along the notch 149a. This problem is particularly aggravated because a plurality of secondary batteries may be configured as a single module, since a flame ejected from one secondary battery may propagate to another secondary battery adjacent thereto and a chain explosion may occur.
  • the top insulator 150 is installed between the electrode assembly 110 and the cap assembly 140.
  • FIG 3 is a plan view illustrating a top insulator 150 of a secondary battery 100 according to an embodiment of the present invention.
  • the top insulator 150 is formed to correspond to the inner shape of the case 130, and is inserted between the electrode assembly 110 and the cap assembly 140 to be in contact with the inner wall of the case 130. Can be. If the case 130 is formed of a rectangular parallelepiped as described above, the top insulator 150 may be formed into a substantially rectangular shape. Of course, the top insulator 150 may be formed in a different shape while having a different area. For example, the top insulator 150 may be rectangular or elliptical in the form of rounded corners according to the individual shape of the case 130. However, hereinafter, the top insulator 150 is formed as a rectangle as illustrated in FIG. 3.
  • top insulator 150 may be coupled by, for example, adhesive or welding, or may be coupled using a separate hook-like fastening unit.
  • the top insulator 150 includes a flame suppression member 151 and an insulation member 152.
  • the flame suppression member 151 may be formed in a substantially plate shape. At this time, the flame suppression member 151 is formed with a plurality of fine pores.
  • the passage of the flame to be ejected to the outside may be narrowed to suppress the flame itself from being ejected to the outside.
  • the size of the flame may be suppressed by lowering its temperature and reducing the amount of oxygen that may be supplied to the flame.
  • the flame suppression member 151 narrows a passage for ejecting these materials to the outside. It is also possible to prevent the flame from further amplifying.
  • the effect of the flame suppression member 151 may be improved as the air gap is densely formed, but at the same time, the air gap may be formed to have an appropriate porosity in order to secure a passage for gas discharge to the outside.
  • the porosity may vary depending on the individual design conditions of the secondary battery 100, it is not specifically defined herein.
  • the flame suppression member 151 is made of a heat resistant material.
  • it may be made of a material containing at least one of stainless steel (SUS) or poly phenylene sulfide (PPS).
  • SUS stainless steel
  • PPS poly phenylene sulfide
  • the voids of the flame suppression member 151 may be blocked or the size thereof may not be too large. It may be used as a material of the suppression member 151.
  • the flame suppression member 151 may be formed in the form of a plate having a plurality of simple holes, for example, may be formed of a porous structure such as mesh or steel wool.
  • the insulating member 152 is made of an insulating material, so that the flame suppression member 151 may be shorted in contact with the electrode assembly 110 and the cap assembly 140 to further prevent at least part of the flame suppression member 151. Can be combined to cover.
  • the insulating member 152 may be coupled to cover the bottom surface close to the electrode assembly 110 and the top surface close to the cap plate 130 of the flame suppression member 151. have.
  • the overall top insulator 150 inserts the flame suppression member 151 previously formed into the mold for molding the insulation member 152 and then injects the insulation member 152 through so-called insert injection molding. Can be made.
  • this is only a simple example for manufacturing the top insulator 150, and may be manufactured in other ways.
  • the top insulator 150 may be formed by stacking an upper insulation member, a flame suppression member, and a lower insulation member in order, or may be formed by inserting a flame suppression member into a previously completed insulation member.
  • FIG. 4 it may be coupled to cover the bottom surface of the flame suppression member 151.
  • FIG. 5 it may be combined to cover the top surface of the flame suppression member 151.
  • the shape in which the flame suppressing member 151 and the insulating member 152 are coupled to each other, an area in contact with each other, and the like may vary according to individual internal structures of the secondary battery 100.
  • a gas hole 152a through which gas passes through is formed in the insulating member 152.
  • the gas hole 152a is at least partially in communication with the gap of the flame suppression member 151. Therefore, the gas generated in the secondary battery 100 may pass through the top insulator 150 through the gap of the flame suppression member 151 and the gas hole 152a of the insulating member 152.
  • the gas hole 152a is formed at least of the flame suppression member 151 so that the gas is not blocked by the insulating member 152 after passing through the air gap of the flame suppression member 151, that is, the gas can be smoothly discharged. It will form larger than the voids.
  • the gas hole 152a may be formed in a direction parallel to the direction from the side where the electrode assembly 110 is disposed to the side where the cap plate 130 is disposed so that the gas may be discharged more efficiently. If the normal use state of the secondary battery 100 is as shown in FIG. 2, the hole may be formed to penetrate the insulating member 152 in the vertical direction.
  • each gas hole 152a may be formed to extend along a short axis of the rectangle as shown in FIG. 3, and may be arranged to be spaced apart from each other along the long axis of the rectangle.
  • they may be formed to extend along a long axis of the rectangle, and may be arranged to be spaced apart from each other along the short axis of the rectangle.
  • the gas holes 152a may be arranged to be spaced apart from each other along the short axis and the long axis of the rectangle as shown in FIG. 7, and spaced apart from each other with respect to the short axis or the long axis of the rectangle, as shown in FIG. 8. It may be arranged to be.
  • the width, length, number, and spacing of the gas holes 152a may vary depending on individual design conditions of the secondary battery 100, and thus, the specific description is not provided herein.
  • the insulating member 152 may further include a first through hole 152b and a second through hole 152c through which the first and second current collector plates 121 and 122 pass. .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

An embodiment of the present invention relates to a secondary battery, and in order to resolve a technical problem, provided is a secondary battery capable of preventing a fire from occurring therein. The secondary battery according to the embodiment of the present invention can comprise: an electrode assembly; a case for accommodating the electrode assembly; a cap plate connected to the case and sealing the case; an insulating member made of an insulating material, provided between the electrode assembly and the cap plate, and having a hole formed such that a fluid passes therethrough; and a fire suppression member coupled to the insulating member and having a plurality of pores smaller than the hole of the insulating member, wherein the hole of the insulating member at least partially communicates with the pore.

Description

이차 전지Secondary battery
본 발명의 실시예는 이차 전지에 관한 것이다.An embodiment of the present invention relates to a secondary battery.
이차 전지는 일차 전지와 달리 충전과 방전을 반복적으로 수행한다. 일반적으로 소용량의 이차 전지는 휴대폰, 노트북, 캠코더 등과 같이 휴대할 수 있는 소형 전자 기기에 이용되고, 대용량의 이차 전지는 전기 자동차 등에 이용될 수 있다. 이러한 이차 전지는 예컨대 충/방전 작용을 하는 전극 조립체, 전극 조립체를 수용하는 케이스 및 케이스에 결합되어 전극 조립체 등의 이탈을 방지하기 위한 캡 조립체를 포함한다.Unlike the primary battery, the secondary battery repeatedly performs charging and discharging. In general, small-capacity secondary batteries are used in small electronic devices that can be carried, such as mobile phones, laptops, camcorders, etc., and large-capacity secondary batteries can be used in electric vehicles. Such secondary batteries include, for example, an electrode assembly having a charge / discharge function, a case accommodating the electrode assembly, and a cap assembly coupled to the case to prevent detachment of the electrode assembly.
한편 전극 조립체가 충/방전 작용을 반복할 때, 이차 전지의 내부에는 활물질, 전해질 등의 반응에 의해 가스가 생성될 수 있다. 이러한 가스가 이차 전지 내부에 축적되면 그 내압이 상승하여 폭발이 일어날 수 있다. 또한 그 폭발에 따라 화염이 외부로 분출될 수도 있는 문제가 있다.Meanwhile, when the electrode assembly repeats the charging / discharging action, gas may be generated by the reaction of the active material, the electrolyte, and the like in the secondary battery. When such gas accumulates inside the secondary battery, the internal pressure thereof may increase and an explosion may occur. In addition, there is a problem that the flame may be emitted to the outside according to the explosion.
이러한 발명의 배경이 되는 기술에 개시된 상술한 정보는 본 발명의 배경에 대한 이해도를 향상시키기 위한 것일 뿐이며, 따라서 종래기술을 구성하지 않는 정보를 포함할 수도 있다.The above-described information disclosed in the background technology of the present invention is only for improving the understanding of the background of the present invention, and thus may include information that does not constitute the prior art.
본 발명의 실시예는 그 내부에서 발생한 화염을 억제할 수 있는 이차 전지를 제공한다.An embodiment of the present invention provides a secondary battery capable of suppressing a flame generated therein.
본 발명의 실시예에 따른 이차 전지는 전극 조립체, 상기 전극 조립체를 수용하는 케이스, 상기 케이스에 결합되어 밀봉하는 캡 플레이트, 절연성 소재로 이루어져, 상기 전극 조립체와 상기 캡 플레이트 사이에 설치되며, 유체가 관통하여 지나가기 위한 홀이 형성되는 절연 부재 및 상기 절연 부재에 결합되며, 상기 절연 부재의 홀보다 작은 공극이 복수 개로 형성되되, 상기 절연 부재의 홀과 상기 공극이 적어도 부분적으로 연통하도록 형성되는 화염 억제 부재를 포함할 수 있다.A secondary battery according to an embodiment of the present invention is composed of an electrode assembly, a case accommodating the electrode assembly, a cap plate coupled to the case and sealed, an insulating material, and installed between the electrode assembly and the cap plate. A flame coupled to the insulating member and the insulating member having a hole for passing therethrough, and having a plurality of pores smaller than the hole of the insulating member, the flame being formed to at least partially communicate with the hole of the insulating member It may include a suppression member.
또한 상기 절연 부재는 상기 화염 억제 부재 중 상기 전극 조립체에 가까운 일면의 적어도 일부를 덮도록 결합될 수 있다.In addition, the insulating member may be coupled to cover at least a portion of one surface close to the electrode assembly of the flame suppression member.
또한 상기 절연 부재는 상기 화염 억제 부재 중 상기 캡 플레이트에 가까운 일면의 적어도 일부를 덮도록 결합될 수 있다.In addition, the insulating member may be coupled to cover at least a portion of one surface close to the cap plate of the flame suppression member.
또한 상기 절연 부재는 상기 화염 억제 부재 중 상기 전극 조립체에 가까운 일면의 적어도 일부 및 상기 캡 플레이트에 가까운 타면의 적어도 일부를 덮도록 결합될 수 있다.In addition, the insulating member may be coupled to cover at least a portion of one surface close to the electrode assembly and at least a portion of the other surface close to the cap plate among the flame suppression members.
또한 상기 절연 부재와 상기 화염 억제 부재는 인서트 사출 성형으로 함께 제작될 수 있다.In addition, the insulation member and the flame suppression member may be manufactured together by insert injection molding.
또한 상기 절연 부재의 홀은 복수 개로 형성되어 서로 이격되도록 배열될 수 있다.In addition, a plurality of holes of the insulating member may be arranged to be spaced apart from each other.
또한 상기 절연 부재는 실질적인 직사각형 또는 타원형으로 형성되고, 상기 절연 부재의 각 홀은 그 단축 방향을 따라 연장되도록 형성되어, 그 장축 방향을 따라 서로 이격되도록 배열될 수 있다.In addition, the insulating member may be formed in a substantially rectangular or oval shape, and each hole of the insulating member may be formed to extend along a short axis direction thereof, and may be arranged to be spaced apart from each other along the long axis direction.
또한 상기 절연 부재는 실질적인 직사각형 또는 타원형으로 형성되고, 상기 절연 부재의 각 홀은 그 장축 방향을 따라 연장되도록 형성되어, 그 단축 방향을 따라 서로 이격되도록 배열될 수 있다.In addition, the insulating member may be formed in a substantially rectangular or elliptical shape, and each hole of the insulating member may be formed to extend along the major axis direction thereof, and may be arranged to be spaced apart from each other along the minor axis direction.
또한 상기 절연 부재는 실질적인 직사각형 또는 타원형으로 형성되고, 상기 절연 부재의 각 홀은 그 단축 방향 및 장축 방향을 따라 서로 이격되도록 배열될 수 있다.In addition, the insulating member may be formed in a substantially rectangular or oval shape, and each of the holes of the insulating member may be arranged to be spaced apart from each other along its short axis direction and long axis direction.
또한 상기 절연 부재는 실질적인 직사각형 또는 타원형으로 형성되고, 상기 절연 부재의 각 홀은 그 단축 방향 또는 장축 방향 중 적어도 어느 하나의 방향에 대해 어긋나게 서로 이격되도록 배열될 수 있다.In addition, the insulating member may be formed in a substantially rectangular or oval shape, and each of the holes of the insulating member may be arranged to be spaced apart from each other with respect to at least one of the short axis direction and the long axis direction.
또한 상기 절연 부재의 홀은 상기 전극 조립체가 배치된 일측으로부터 상기 캡 플레이트가 배치된 타측으로 향하는 방향과 실질적으로 나란한 방향으로 관통하도록 형성될 수 있다.In addition, the hole of the insulating member may be formed so as to penetrate in a direction substantially parallel to a direction from one side where the electrode assembly is disposed to the other side where the cap plate is disposed.
또한 상기 화염 억제 부재는 내열성 소재로 이루어질 수 있다.In addition, the flame suppression member may be made of a heat resistant material.
또한 상기 화염 억제 부재는 스테인레스강 또는 폴리페닐렌설파이드 중 적어도 어느 하나를 포함하는 소재로 이루어질 수 있다.In addition, the flame suppression member may be made of a material including at least one of stainless steel or polyphenylene sulfide.
또한 상기 화염 억제 부재는 메쉬 형태로 제작될 수 있다.In addition, the flame suppression member may be manufactured in the form of a mesh.
본 발명의 실시예는 전극 조립체와 캡 조립체 사이에 화염 억제 부재가 설치됨으로써, 화염이 이차 전지의 외부로 분출되는 것을 억제하거나, 그 화염의 크기를 억제할 수 있으며, 화염이 추가적으로 증폭되는 것을 방지할 수도 있는 이차 전지를 제공한다.According to the embodiment of the present invention, a flame suppression member is provided between the electrode assembly and the cap assembly, thereby suppressing the flame from being blown out of the secondary battery or suppressing the size of the flame and preventing the flame from being further amplified. Provided is a secondary battery.
또한 절연 부재가 화염 억제 부재의 적어도 일부를 덮도록 형성됨으로써, 화염 억제 부재에 의한 단락을 방지할 수 있는 이차 전지를 제공한다.In addition, the insulating member is formed to cover at least a portion of the flame suppression member, thereby providing a secondary battery capable of preventing a short circuit caused by the flame suppression member.
도 1은 본 발명의 일 실시예에 따른 이차 전지를 도시한 사시도이다.1 is a perspective view illustrating a rechargeable battery according to an exemplary embodiment of the present invention.
도 2는 도 1의 A-A 선에 의한 단면도이다.FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1.
도 3은 본 발명의 일 실시예에 따른 이차 전지의 탑 인슐레이터를 도시한 평면도이다.3 is a plan view illustrating a top insulator of a rechargeable battery according to an exemplary embodiment of the present invention.
도 4는 본 발명의 다른 실시예에 따른 이차 전지를 도시한 단면도이다.4 is a cross-sectional view illustrating a rechargeable battery according to another exemplary embodiment of the present invention.
도 5는 본 발명의 또 다른 실시예에 따른 이차 전지를 도시한 단면도이다.5 is a cross-sectional view of a rechargeable battery according to still another exemplary embodiment of the present invention.
도 6 내지 8은 본 발명의 또 다른 실시예에 따른 이차 전지의 탑 인슐레이터들을 각각 도시한 평면도이다.6 to 8 are plan views illustrating top insulators of a rechargeable battery according to another exemplary embodiment of the present invention, respectively.
이하 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세하게 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
본 발명의 실시예들은 당해 기술분야에서 통상의 지식을 가진 자에게 본 발명을 더욱 완전하게 설명하기 위하여 제공되는 것으로, 하기 실시예는 여러 가지 다른 형태로 변형될 수 있으며, 본 발명의 범위가 하기 실시예에 한정되는 것은 아니다. 오히려 이들 실시예는 본 개시를 더욱 충실하고 완전하게 하며, 당업자에게 본 발명의 사상을 완전하게 전달하기 위하여 제공되는 것이다.Embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, the following examples may be modified in many different forms, the scope of the present invention is It is not limited to an Example. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.
또한 이하의 도면에서 각 층의 두께나 크기는 설명의 편의 및 명확성을 위하여 과장된 것이며, 도면상에서 동일한 부호는 동일한 요소를 지칭한다. 본 명세서에서 사용된 바와 같은 용어 "및/또는"은 해당 열거된 항목 중 어느 하나 및 하나 이상의 모든 조합을 포함한다. 또한 본 명세서에서 "연결된다"라는 의미는 A 부재와 B 부재가 직접적으로 연결되는 경우뿐만 아니라, A 부재와 B 부재의 사이에 C 부재가 개재되어 A 부재와 B 부재가 간접적으로 연결되는 경우도 의미한다.In addition, the thickness or size of each layer in the following drawings are exaggerated for convenience and clarity of description, the same reference numerals in the drawings refer to the same elements. The term "and / or" as used herein includes any and all combinations of one or more of the listed items. In addition, the meaning of “connected” in the present specification is not only when the A member and the B member are directly connected, but also when the A member and the B member are indirectly connected by interposing the C member between the A member and the B member. it means.
본 명세서에서 사용된 용어는 특정 실시예를 설명하기 위해 사용되며, 본 발명을 제한하기 위한 것이 아니다. 본 명세서에서 사용된 바와 같은 단수의 형태는 문맥상 다른 경우를 분명히 지적하는 것이 아니라면, 복수의 형태를 포함할 수 있다. 또한 본 명세서에서 사용되는 경우 "포함한다(comprise, include)" 및/또는 "포함하는(comprising, including)"은 언급한 형상들, 숫자, 단계, 동작, 부재, 요소 및/또는 이들 그룹의 존재를 특정하는 것이며, 하나 이상의 다른 형상, 숫자, 동작, 부재, 요소 및 /또는 그룹들의 존재 또는 부가를 배제하는 것이 아니다.The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Also, as used herein, "comprise, include" and / or "comprising, including" means the presence of the mentioned shapes, numbers, steps, actions, members, elements and / or groups thereof. Is not intended to exclude the presence or addition of one or more other shapes, numbers, operations, members, elements and / or groups.
본 명세서에서 제1, 제2 등의 용어가 다양한 부재, 부품, 영역, 층들 및/또는 부분들을 설명하기 위해 사용되지만, 이들 부재, 부품, 영역, 층들 및/또는 부분들은 이들 용어에 의해 한정되어서는 안 됨이 자명하다. 이들 용어는 하나의 부재, 부품, 영역, 층 또는 부분을 다른 영역, 층 또는 부분과 구별하기 위해서만 사용된다. 따라서 이하 상술할 제1 부재, 부품, 영역, 층 또는 부분은 본 발명의 가르침으로부터 벗어나지 않고서도 제2 부재, 부품, 영역, 층 또는 부분을 지칭할 수 있다.Although the terms first, second, etc. are used herein to describe various members, parts, regions, layers, and / or parts, these members, parts, regions, layers, and / or parts are defined by these terms. It is obvious that not. These terms are only used to distinguish one member, part, region, layer or portion from another region, layer or portion. Thus, the first member, part, region, layer or portion described below may refer to the second member, component, region, layer or portion without departing from the teachings of the present invention.
"하부(beneath)", "아래(below)", "낮은(lower)", "상부(above)", "위(upper)"와 같이 공간에 관련된 용어가 도면에 도시된 한 요소 또는 특징과 다른 요소 또는 특징의 용이한 이해를 위해 이용될 수 있다. 이러한 공간에 관련된 용어는 본 발명의 다양한 공정상태 또는 사용상태에 따라 본 발명의 용이한 이해를 위한 것이며, 본 발명을 한정하기 위한 것은 아니다. 예를 들어 도면의 요소 또는 특징이 뒤집어지면, "하부" 또는 "아래"로 설명된 요소 또는 특징은 "상부" 또는 "위"로 된다. 따라서 "아래"는 "상부" 또는 "아래"를 포괄하는 개념이다.Terms relating to space, such as "beneath", "below", "lower", "above", and "upper", are referred to as one element or feature shown in the figures. It can be used for easy understanding of other elements or features. Terms related to this space are for easy understanding of the present invention according to various process conditions or use conditions of the present invention, and are not intended to limit the present invention. For example, if an element or feature in the figures is inverted, the element or feature described as "bottom" or "bottom" is "top" or "top". Thus, "below" is a concept encompassing "top" or "bottom".
도 1은 본 발명의 일 실시예에 따른 이차 전지(100)를 도시한 사시도이고, 도 2는 도 1의 A-A 선에 의한 단면도이다.1 is a perspective view illustrating a rechargeable battery 100 according to an exemplary embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1.
도 1과 2를 참조하면 이차 전지(100)는 전극 조립체(110), 제1 집전 판(121), 제2 집전 판(122), 케이스(130), 캡 조립체(140) 및 탑 인슐레이터(150)를 포함한다.1 and 2, the secondary battery 100 includes an electrode assembly 110, a first current collecting plate 121, a second current collecting plate 122, a case 130, a cap assembly 140, and a top insulator 150. ).
전극 조립체(110)는 얇은 판형이나 막대형으로 형성된 제1 전극 판(111), 세퍼레이터(113) 및 제2 전극 판(112)으로 구성된 적층체가 젤리 롤(jelly roll)의 형태로 권취되거나 겹쳐져 형성될 수 있다.The electrode assembly 110 is formed by winding or overlapping a laminate formed of a first electrode plate 111, a separator 113, and a second electrode plate 112 formed in a thin plate shape or a rod shape in the form of a jelly roll. Can be.
여기서 예컨대 제1 전극 판(111)은 양극 판이고, 제2 전극 판(112)은 음극 판일 수 있다. 또는 이와 반대로 제1 전극 판(111)이 음극 판이고, 제2 전극 판(112)이 양극 판일 수도 있다.For example, the first electrode plate 111 may be a positive electrode plate, and the second electrode plate 112 may be a negative electrode plate. Alternatively, the first electrode plate 111 may be a negative electrode plate, and the second electrode plate 112 may be a positive electrode plate.
제1 전극 판(111)은 금속 포일과 같은 제1 전극 집전체에 제1 전극 활물질을 도포하여 형성될 수 있다. 만약 제1 전극 판이 양극 판이라면 제1 전극 집전체는 알루미늄으로 이루어질 수 있고, 제1 전극 활물질은 리튬계 산화물로 이루어질 수 있다. 단 상기 재질은 단순한 예시에 불과하며, 본 발명의 제1 전극 판(111)이 상기 재질로만 이루어지도록 한정되는 것은 아니다. 한편 제1 전극 판(111)에는 제1 전극 활물질이 도포되지 않는 영역인 제1 전극 무지부(111a)가 함께 형성된다. 이러한 제1 전극 무지부(111a)는 제1 전극 판(111)과 그 외부 간에 전류가 흐르기 위한 통로의 역할을 하게 된다.The first electrode plate 111 may be formed by applying a first electrode active material to a first electrode current collector such as a metal foil. If the first electrode plate is a positive electrode plate, the first electrode current collector may be made of aluminum, and the first electrode active material may be made of lithium oxide. However, the material is only a mere example, and the first electrode plate 111 of the present invention is not limited to the material. On the other hand, the first electrode plate 111a, which is a region where the first electrode active material is not coated, is formed on the first electrode plate 111 together. The first electrode supporting portion 111a serves as a passage for the current to flow between the first electrode plate 111 and the outside thereof.
제2 전극 판(112) 역시 금속 포일과 같은 제2 전극 집전체에 제2 전극 활물질을 도포하여 형성될 수 있다. 만약 제2 전극 판(112)이 음극 판이라면 제2 전극 집전체는 니켈이나 구리로 이루어질 수 있고, 제2 전극 활물질은 흑연이나 탄소로 이루어질 수 있다. 단 상기 재질은 단순한 예시에 불과하며, 본 발명의 제2 전극 판(112)이 상기 재질로만 이루어지도록 한정되는 것은 아니다. 한편 제2 전극 판(112)에도 제2 전극 활물질이 도포되지 않는 영역인 제2 전극 무지부(112a)가 형성된다. 이러한 제2 전극 무지부(112a)는 제2 전극 판(112)과 그 외부 간에 전류가 흐르기 위한 통로의 역할을 하게 된다.The second electrode plate 112 may also be formed by applying a second electrode active material to a second electrode current collector such as a metal foil. If the second electrode plate 112 is a negative electrode plate, the second electrode current collector may be made of nickel or copper, and the second electrode active material may be made of graphite or carbon. However, the material is merely a mere example, and the second electrode plate 112 of the present invention is not limited to the material. On the other hand, in the second electrode plate 112, the second electrode uncoated portion 112a, which is a region where the second electrode active material is not coated, is formed. The second electrode supporting portion 112a serves as a passage for the current to flow between the second electrode plate 112 and the outside thereof.
세퍼레이터(113)는 제1 전극 판(111)과 제2 전극 판(112) 사이에 배치되어, 제1 전극 판(111)과 제2 전극 판(112)이 서로 접하여 단락(short)되는 현상을 방지한다. 이와 함께 세퍼레이터(113)는 예컨대 리튬 이온이 이동하기 위한 통로의 역할을 한다. 이러한 세퍼레이터는 폴리에틸렌(Polyethylene, PE), 폴리프로필렌(Polypropylene, PP) 또는 폴리에틸렌과 폴리프로필렌의 복합 필름으로 이루어질 수 있다. 단 상기 재질은 단순한 예시에 불과하며, 본 발명의 세퍼레이터(113)가 상기 재질로만 이루어지도록 한정되는 것은 아니다.The separator 113 is disposed between the first electrode plate 111 and the second electrode plate 112 to prevent the first electrode plate 111 and the second electrode plate 112 from being in contact with each other. prevent. In addition, the separator 113 serves as a passage for moving lithium ions, for example. Such a separator may be made of polyethylene (PE), polypropylene (PP), or a composite film of polyethylene and polypropylene. However, the material is merely an example, and the separator 113 of the present invention is not limited to being made of only the material.
이와 같은 전극 조립체(110)의 양측 단부에는 제1 전극 판(111) 및 제2 전극 판(112)과 각각 전기적으로 연결되는 제1 집전 판(121)과 제2 집전 판(122)이 결합된다.The first collector plate 121 and the second collector plate 122, which are electrically connected to the first electrode plate 111 and the second electrode plate 112, are respectively coupled to both ends of the electrode assembly 110. .
제1 집전 판(121)은 알루미늄과 같은 도전성 재질로 이루어져, 전극 조립체(110)의 일측 단부로 돌출된 제1 전극 무지부(111a)와 접함으로써 제1 전극 판(111)과 전기적으로 연결된다.The first current collecting plate 121 is made of a conductive material such as aluminum, and is electrically connected to the first electrode plate 111 by contacting the first electrode supporting portion 111a protruding to one end of the electrode assembly 110. .
제2 집전 판(122)은 니켈이나 구리와 같은 도전성 재질로 이루어져, 전극 조립체(110)의 타측 단부로 돌출된 제2 전극 무지부(112a)와 접함으로써 제2 전극 판(112)과 전기적으로 연결된다.The second current collecting plate 122 is made of a conductive material such as nickel or copper, and is in contact with the second electrode plate 112 by contacting the second electrode uncoated portion 112a protruding to the other end of the electrode assembly 110. Connected.
단 상기 재질은 마찬가지로 단순한 예시에 불과하며, 본 발명의 제1 집전 판(121)과 제2 집전 판(122)이 상기 재질로만 이루어지도록 한정되는 것은 아니다.However, the material is just a simple example, and the first collector plate 121 and the second collector plate 122 of the present invention are not limited to the material.
케이스(130)는 실질적인 육면체로 형성되며, 그 일면에 전극 조립체(110), 제1 집전 판(121) 및 제2 집전 판(122)이 삽입되기 위한 개구가 형성될 수 있다. 물론 케이스(130)는 원기둥이나 그밖에 다른 다면체로 형성될 수도 있다. 다만 이하에서는 케이스(130)가 도 1에 도시된 바와 같이 직육면체로 형성되는 것을 예로 들어 설명하기로 한다. 한편 도 2에서는 케이스(130)와 캡 조립체(140)가 결합된 상태로 도시되어 있기 때문에 상기 개구가 나타나 있지 않으나, 여기서 상기 개구는 실질적으로 캡 조립체(140)의 둘레에 상응하는 부분에 해당할 것이다. 케이스(130)의 내면은 절연 처리되어 전극 조립체(110), 제1 집전 판(121) 및 제2 집전 판(122)과 절연될 수 있다.The case 130 is formed of a substantially hexahedron, and an opening for inserting the electrode assembly 110, the first collector plate 121, and the second collector plate 122 may be formed on one surface thereof. Of course, the case 130 may be formed of a cylinder or other polyhedron. However, hereinafter, the case 130 will be described with an example of forming a rectangular parallelepiped as shown in FIG. 1. Meanwhile, in FIG. 2, the opening is not shown because the case 130 and the cap assembly 140 are shown coupled, but the opening may correspond to a portion corresponding to the circumference of the cap assembly 140. will be. The inner surface of the case 130 may be insulated to be insulated from the electrode assembly 110, the first current collecting plate 121, and the second current collecting plate 122.
*이러한 케이스(130)에는 캡 조립체(140)가 결합된다.* The cap assembly 140 is coupled to the case 130.
캡 조립체(140)는 캡 플레이트(141), 제1 전극 단자(142), 제1 단자 플레이트(143), 제2 전극 단자(144), 제2 단자 플레이트(145), 제1 가스켓(146), 제2 가스켓(147), 주입 마개(148) 및 벤트 플레이트(149)를 포함한다.The cap assembly 140 includes a cap plate 141, a first electrode terminal 142, a first terminal plate 143, a second electrode terminal 144, a second terminal plate 145, and a first gasket 146. , A second gasket 147, an injection stopper 148, and a vent plate 149.
캡 플레이트(141)는 케이스(130)의 개구를 밀봉하여, 케이스(130)의 내부에 수용된 전극 조립체(110), 제1 집전 판(121) 및 제2 집전 판(122)이 그 외부로 이탈하는 것을 방지한다. 이러한 캡 플레이트(141)에는 제1 단자 홀(141a), 제2 단자 홀(141b), 전해액 주입구(141c) 및 벤트 홀(141c)이 형성될 수 있다.The cap plate 141 seals the opening of the case 130, so that the electrode assembly 110, the first current collecting plate 121, and the second current collecting plate 122 accommodated in the case 130 are separated out of the case 130. Prevent it. The cap plate 141 may have a first terminal hole 141a, a second terminal hole 141b, an electrolyte injection hole 141c, and a vent hole 141c.
제1 단자 홀(141a)과 제2 단자 홀(141b)은 후술할 제1 전극 단자(142)와 제2 전극 단자(144)가 각각 관통하여 설치되기 위한 부분이다. 이때 제1 단자 홀(141a)과 제2 단자 홀(141b)은 제1 전극 단자(142)와 제2 전극 단자(144)의 직경에 각각 상응하도록 형성될 수 있다. 또는 후술할 제1 가스켓(146)과 제2 가스켓(147)이 각각 설치될 공간을 마련하기 위해 제1 전극 단자(142)와 제2 전극 단자(144)의 직경보다 약간 더 크도록 형성될 수도 있다.The first terminal hole 141a and the second terminal hole 141b are portions through which the first electrode terminal 142 and the second electrode terminal 144 to be described later are respectively installed. In this case, the first terminal hole 141a and the second terminal hole 141b may be formed to correspond to the diameters of the first electrode terminal 142 and the second electrode terminal 144, respectively. Alternatively, the first gasket 146 and the second gasket 147, which will be described later, may be formed to be slightly larger than the diameters of the first electrode terminal 142 and the second electrode terminal 144, respectively, in order to provide a space to be installed. have.
전해액 주입구(141c)는 케이스(130)와 캡 조립체(140)가 서로 결합된 상태에서 그 내부로 전해액을 주입하기 위한 부분이다. 여기서 전해액은 이차 전치(100)의 충/방전 시 예컨대 리튬 이온이 이동하기 위한 매체의 역할을 한다. 이러한 전해액은 예컨대 에틸렌카보네이트(Ethylene Carbonate, EC), 프로필렌카보네이트(Propylene Carbonate, PC), 디에틸카보네이트(Diethyl Carbonate, DEC), 디메틸카보네이트(Dimethyl Carbonate, DMC) 등과 같은 유기 용매와 육뷸화인산리튬(LiPF6), 사불화붕산리튬(LiBF4) 등과 같은 리튬염으로 이루어져 액체, 고체 또는 겔상으로 이루어질 수 있다.The electrolyte injection hole 141c is a portion for injecting electrolyte into the case 130 and the cap assembly 140 in a state in which they are coupled to each other. In this case, the electrolyte serves as a medium for moving lithium ions, for example, during charging / discharging of the secondary electrode 100. Such electrolytes include, for example, organic solvents such as ethylene carbonate (EC), propylene carbonate (Propylene Carbonate (PC)), diethyl carbonate (Diethyl Carbonate (DEC)), dimethyl carbonate (Dimethyl Carbonate, DMC) and lithium hexafluorophosphate ( LiPF 6 ), lithium tetrafluoroborate (LiBF 4 ) and the like may be formed in a liquid, solid or gel form.
벤트 홀(141c)은 이차 전지(100)의 내부에서 발생한 가스가 그 외부로 배출되기 위한 부분이다.The vent hole 141c is a portion for discharging gas generated inside the secondary battery 100 to the outside thereof.
제1 전극 단자(142)는 막대형으로 형성되어, 캡 플레이트(141)를 관통하도록 설치될 수 있다. 이때 제1 전극 단자(142) 중 케이스(130)의 내부를 향하는 일단, 즉 캡 플레이트(141)의 하부에 배치된 일단은 제1 집전 판(121)과 전기적으로 연결된다. 또한 제1 전극 단자(142)의 일단에는 제1 전극 단자(142)가 캡 플레이트(141)로부터 그 상방으로 이탈하지 않도록 그 길이 방향을 가로지르는 방향으로 플랜지(142a)가 형성될 수 있다. 한편 제1 전극 단자(142) 중 캡 플레이트(141)의 상부로 노출된 타단은 제1 단자 플레이트(143)와 리벳 형태로 결합될 수 있다.The first electrode terminal 142 may be formed in a bar shape and installed to penetrate the cap plate 141. At this time, one end of the first electrode terminal 142 facing the inside of the case 130, that is, one end disposed under the cap plate 141 is electrically connected to the first current collecting plate 121. In addition, a flange 142a may be formed at one end of the first electrode terminal 142 in a direction crossing the longitudinal direction so that the first electrode terminal 142 does not separate upward from the cap plate 141. Meanwhile, the other end of the first electrode terminal 142 exposed to the upper portion of the cap plate 141 may be coupled to the first terminal plate 143 in a riveted form.
제2 전극 단자(144) 역시 막대형으로 형성되어, 캡 플레이트(141)를 관통하도록 설치될 수 있다. 이때 제2 전극 단자(144) 중 캡 플레이트(141)의 하부에 배치된 일단은 제2 집전 판(122)과 전기적으로 연결된다. 또한 제2 전극 단자(144)의 일단에는 제2 전극 단자(144)가 캡 플레이트(141)로부터 그 상방으로 이탈하지 않도록 그 길이 방향을 가로지르는 방향으로 플랜지(144a)가 형성될 수 있다. 한편 제2 전극 단자(144) 중 캡 플레이트(141)의 상부로 노출된 타단도 제2 단자 플레이트(145)와 리벳 형태로 결합될 수 있다.The second electrode terminal 144 may also be formed in a bar shape and installed to penetrate the cap plate 141. At this time, one end of the second electrode terminal 144 disposed under the cap plate 141 is electrically connected to the second current collecting plate 122. In addition, a flange 144a may be formed at one end of the second electrode terminal 144 in a direction crossing the longitudinal direction so that the second electrode terminal 144 does not escape upward from the cap plate 141. Meanwhile, the other end of the second electrode terminal 144 exposed to the upper portion of the cap plate 141 may also be coupled to the second terminal plate 145 in a riveted form.
제1 가스켓(146)은 절연성 소재로 이루어져, 캡 플레이트(141)와 제1 전극 단자(142) 사이 및 캡 플레이트(141)와 제1 단자 플레이트(143) 사이에 설치되어, 캡 플레이트(141)와 제1 전극 단자(142) 및 캡 플레이트(141)와 제1 단자 플레이트(143)를 절연한다.The first gasket 146 is made of an insulating material, and is installed between the cap plate 141 and the first electrode terminal 142 and between the cap plate 141 and the first terminal plate 143 to form the cap plate 141. And insulate the first electrode terminal 142, the cap plate 141, and the first terminal plate 143.
제2 가스켓(147) 역시 절연성 소재로 이루어져, 캡 플레이트(141)와 제2 전극 단자(144) 사이 및 캡 플레이트(141)와 제2 단자 플레이트(145) 사이에 설치되어, 캡 플레이트(141)와 제2 전극 단자(144) 및 캡 플레이트(141)와 제2 단자 플레이트(145)를 절연한다.The second gasket 147 is also made of an insulating material, and is installed between the cap plate 141 and the second electrode terminal 144 and between the cap plate 141 and the second terminal plate 145, and thus the cap plate 141. And insulate the second electrode terminal 144, the cap plate 141, and the second terminal plate 145.
이와 함께 제1 가스켓(146)과 제2 가스켓(147)은 제1 단자 홀(141a)과 제2 단자 홀(141b)을 긴밀하게 밀봉하여, 이차 전지(100)의 외부로부터 수분이나 각종 이물질이 그 내부로 침투하는 것을 방지하거나, 이차 전지(100)의 내부로부터 전해액 등이 그 외부로 유출되는 것을 방지하는 역할도 할 수 있다.In addition, the first gasket 146 and the second gasket 147 tightly seal the first terminal hole 141a and the second terminal hole 141b, and moisture or various foreign matters may be removed from the outside of the secondary battery 100. It may also prevent the penetration into the interior, or may prevent the electrolyte or the like from flowing out of the secondary battery 100 to the outside.
주입 마개(148)는 캡 플레이트(141)의 전해액 주입구(141c)를 통해 케이스(130)의 내부로 전해액을 주입한 후 그 전해액이 외부로 유출되는 것을 방지하기 위해, 전해액 주입구(141c)에 삽입됨으로써 이를 긴밀하게 밀봉하는 역할을 한다.The injection plug 148 is inserted into the electrolyte injection hole 141c in order to prevent the electrolyte from flowing out after injecting the electrolyte into the case 130 through the electrolyte injection hole 141c of the cap plate 141. This serves to seal it tightly.
벤트 플레이트(149)는 캡 플레이트(141)의 벤트 홀(141c)에 대응되는 지점에 설치된다.The vent plate 149 is installed at a point corresponding to the vent hole 141c of the cap plate 141.
이차 전지(100)는 과충전이나 각종 이상 작동에 의해 그 내부에서 열과 가스가 발생할 수 있는데, 이에 따라 이차 전지(100)의 내부 압력이 미리 정해진 압력보다 높아지면 벤트 플레이트(149)는 케이스(130)나 캡 플레이트(141)의 다른 부분보다 먼저 절개되어 개방됨으로써, 의도치 않은 폭발을 방지하고 그 가스를 외부로 배출하는 역할을 한다. 이때 벤트 플레이트(149)에는 그 절개를 보다 확실하게 보장하기 위해 특정한 형상의 노치(149a)가 형성될 수 있다.The secondary battery 100 may generate heat and gas therein due to overcharging or various abnormal operations. Accordingly, when the internal pressure of the secondary battery 100 is higher than a predetermined pressure, the vent plate 149 may have a case 130. B by cutting and opening earlier than the other parts of the cap plate 141, it serves to prevent the unintentional explosion and to discharge the gas to the outside. At this time, the vent plate 149 may be formed with a notch 149a having a specific shape in order to more secure the cutting.
한편 이와 같은 벤트 플레이트(149)는 단순한 가스는 효율적으로 배출할 수 있으나, 이차 전지(100)의 내부에서 그 온도 상승으로 인해 발생한 화염에 대해서는 적극적으로 대처할 수 없는 한계가 있다. 오히려 노치(149a)를 따라 절개된 틈 사이를 통해 그 화염이 외부로 분출될 수 있다. 이는 특히 다수의 이차 전지가 하나의 모듈로 구성될 경우, 어느 하나의 이차 전지로부터 분출된 화염이 그와 이웃한 다른 이차 전지로 전파되어 연쇄적인 폭발이 일어날 수도 있기 때문에 그 문제가 더욱 심각해진다.Meanwhile, the vent plate 149 may efficiently discharge simple gas, but there is a limit that the vent plate 149 may not actively cope with the flame generated due to the temperature rise inside the secondary battery 100. Rather, the flame may be blown out through a gap cut along the notch 149a. This problem is particularly aggravated because a plurality of secondary batteries may be configured as a single module, since a flame ejected from one secondary battery may propagate to another secondary battery adjacent thereto and a chain explosion may occur.
따라서 이러한 문제를 해결하기 위해 전극 조립체(110)와 캡 조립체(140) 사이에는 탑 인슐레이터(150)가 설치된다.Therefore, in order to solve this problem, the top insulator 150 is installed between the electrode assembly 110 and the cap assembly 140.
도 3은 본 발명의 일 실시예에 따른 이차 전지(100)의 탑 인슐레이터(150)를 도시한 평면도이다.3 is a plan view illustrating a top insulator 150 of a secondary battery 100 according to an embodiment of the present invention.
도 1 내지 3을 참조하면 탑 인슐레이터(150)는 케이스(130)의 내부 형상에 상응하게 형성되어, 전극 조립체(110)와 캡 조립체(140) 사이에서 케이스(130)의 내벽에 접하도록 삽입될 수 있다. 만약 앞서 예로 든 바와 같이 케이스(130)가 직육면체로 형성된다면, 탑 인슐레이터(150)는 실질적인 직사각형으로 형성될 것이다. 물론 탑 인슐레이터(150)는 그밖에 다른 면적을 가지면서 다른 형상으로 형성될 수도 있다. 예컨대 탑 인슐레이터(150)는 케이스(130)의 개별적인 형상에 따라 각 꼭짓점이 둥근 형태의 직사각형이나 타원형 등일 수도 있다. 다만 이하에서는 탑 인슐레이터(150)가 도 3에 도시된 바와 같이 직사각형으로 형성되는 것을 예로 들어 설명하기로 한다.1 to 3, the top insulator 150 is formed to correspond to the inner shape of the case 130, and is inserted between the electrode assembly 110 and the cap assembly 140 to be in contact with the inner wall of the case 130. Can be. If the case 130 is formed of a rectangular parallelepiped as described above, the top insulator 150 may be formed into a substantially rectangular shape. Of course, the top insulator 150 may be formed in a different shape while having a different area. For example, the top insulator 150 may be rectangular or elliptical in the form of rounded corners according to the individual shape of the case 130. However, hereinafter, the top insulator 150 is formed as a rectangle as illustrated in FIG. 3.
또한 탑 인슐레이터(150)는 예컨대 접착제나 용접에 의해 결합될 수도 있고, 별도의 후크 형상의 체결부 등을 이용하여 결합될 수도 있다.In addition, the top insulator 150 may be coupled by, for example, adhesive or welding, or may be coupled using a separate hook-like fastening unit.
이러한 탑 인슐레이터(150)는 화염 억제 부재(151)와 절연 부재(152)를 포함한다.The top insulator 150 includes a flame suppression member 151 and an insulation member 152.
화염 억제 부재(151)는 실질적인 판 형상으로 형성될 수 있다. 이때 화염 억제 부재(151)에는 다수의 미세한 공극이 형성된다.The flame suppression member 151 may be formed in a substantially plate shape. At this time, the flame suppression member 151 is formed with a plurality of fine pores.
이에 의하면 앞서 언급한 바와 같이 이차 전지(100)의 내부에서 화염이 발생할 경우, 그 화염이 외부로 분출되기 위한 통로를 좁혀 화염이 외부로 분출되는 것 자체를 억제할 수 있다. 또한 화염이 화염 억제 부재(151)를 통과할 때, 그 온도를 낮추고 화염으로 공급될 수 있는 산소의 양을 줄여 화염의 크기를 억제할 수도 있다. 더욱이 이차 전지(100)의 내부에 있던 각종 물질들이 화염과 함께 분출되면서 산소와 접촉하게 되면 급격한 연소 반응이 일어날 수 있는데, 이때 화염 억제 부재(151)는 이러한 물질들이 외부로 분출되기 위한 통로를 좁혀 화염이 추가적으로 증폭되는 것을 방지할 수도 있다.As described above, when a flame occurs in the inside of the secondary battery 100, the passage of the flame to be ejected to the outside may be narrowed to suppress the flame itself from being ejected to the outside. In addition, when the flame passes through the flame suppression member 151, the size of the flame may be suppressed by lowering its temperature and reducing the amount of oxygen that may be supplied to the flame. Furthermore, when various materials in the secondary battery 100 come into contact with oxygen while being ejected together with a flame, a rapid combustion reaction may occur. In this case, the flame suppression member 151 narrows a passage for ejecting these materials to the outside. It is also possible to prevent the flame from further amplifying.
이와 같은 효과는 일반적으로 화염 억제 부재(151)의 공극이 조밀하게 형성될수록 더 향상될 수 있겠으나, 이와 동시에 가스가 외부로 배출되기 위한 통로도 함께 확보하기 위하여 적절한 공극률을 갖도록 형성될 수 있다. 다만 그 공극률은 이차 전지(100)의 개별적인 설계 조건에 따라 얼마든지 달라질 수 있으므로, 여기서 구체적으로 특정하지는 않기로 한다.In general, the effect of the flame suppression member 151 may be improved as the air gap is densely formed, but at the same time, the air gap may be formed to have an appropriate porosity in order to secure a passage for gas discharge to the outside. However, since the porosity may vary depending on the individual design conditions of the secondary battery 100, it is not specifically defined herein.
또한 화염 억제 부재(151)는 내열성 소재로 이루어진다. 예컨대 스테인레스강(Steel Use Stainless, SUS)이나 폴리페닐렌설파이드(Poly Phenylene Sulfide, PPS) 중 적어도 어느 하나를 포함하는 소재로 이루어질 수 있다. 다만 그밖에도 이차 전지(100)의 내부에서 발생한 화염을 견딜 수만 있다면, 즉 화염에 의해 녹거나 변형되어, 화염 억제 부재(151)의 공극이 막히거나 그 크기가 지나치게 커지지만 않을 수 있다면, 모두 화염 억제 부재(151)의 재질로서 이용될 수 있을 것이다.In addition, the flame suppression member 151 is made of a heat resistant material. For example, it may be made of a material containing at least one of stainless steel (SUS) or poly phenylene sulfide (PPS). However, if only the flame generated inside the secondary battery 100 can withstand, i.e., melted or deformed by the flame, the voids of the flame suppression member 151 may be blocked or the size thereof may not be too large. It may be used as a material of the suppression member 151.
이러한 화염 억제 부재(151)는 단순한 홀이 복수 개로 형성된 판의 형태로 형성될 수도 있고, 예컨대 메쉬(mesh)나 강철솜 등과 같은 다공성 구조로 형성될 수도 있다.The flame suppression member 151 may be formed in the form of a plate having a plurality of simple holes, for example, may be formed of a porous structure such as mesh or steel wool.
절연 부재(152)는 절연성 소재로 이루어져, 화염 억제 부재(151)가 전극 조립체(110) 및 캡 조립체(140)와 접하여 단락되는 현상을 더욱 방지하기 위해, 화염 억제 부재(151)의 적어도 일부를 덮도록 결합될 수 있다.The insulating member 152 is made of an insulating material, so that the flame suppression member 151 may be shorted in contact with the electrode assembly 110 and the cap assembly 140 to further prevent at least part of the flame suppression member 151. Can be combined to cover.
예컨대 절연 부재(152)는 도 2에 도시된 바와 같이 절연 부재(152)는 화염 억제 부재(151) 중 전극 조립체(110)와 가까운 하면 및 캡 플레이트(130)와 가까운 상면을 덮도록 결합될 수 있다. 이 경우 전체적인 탑 인슐레이터(150)는 절연 부재(152)를 성형하기 위한 금형의 내부에 미리 형성된 화염 억제 부재(151)를 삽입한 후 절연 부재(152)를 사출하는 방식, 이른바 인서트 사출 성형을 통해 제작될 수 있다. 다만 이는 탑 인슐레이터(150)를 제작하기 위한 단순한 예시에 불과하며, 그밖에 다른 방식으로 제작될 수도 있다. 예컨대 탑 인슐레이터(150)는 상부 절연 부재, 화염 억제 부재 및 하부 절연 부재를 순서대로 적층하여 형성될 수도 있고, 미리 완성된 절연 부재의 내부에 화염 억제 부재를 삽입함으로써 형성될 수도 있다.For example, as shown in FIG. 2, the insulating member 152 may be coupled to cover the bottom surface close to the electrode assembly 110 and the top surface close to the cap plate 130 of the flame suppression member 151. have. In this case, the overall top insulator 150 inserts the flame suppression member 151 previously formed into the mold for molding the insulation member 152 and then injects the insulation member 152 through so-called insert injection molding. Can be made. However, this is only a simple example for manufacturing the top insulator 150, and may be manufactured in other ways. For example, the top insulator 150 may be formed by stacking an upper insulation member, a flame suppression member, and a lower insulation member in order, or may be formed by inserting a flame suppression member into a previously completed insulation member.
또는 다른 예로서 도 4에 도시된 바와 같이 화염 억제 부재(151)의 하면을 덮도록 결합될 수도 있다. 또 다른 예로서 도 5에 도시된 바와 같이 화염 억제 부재(151)의 상면을 덮도록 결합될 수도 있다. 이러한 화염 억제 부재(151)와 절연 부재(152)가 서로 결합되는 형태, 접촉되는 면적 등은 이차 전지(100)의 개별적인 내부 구조에 따라 달라질 수 있다.As another example, as shown in FIG. 4, it may be coupled to cover the bottom surface of the flame suppression member 151. As another example, as shown in FIG. 5, it may be combined to cover the top surface of the flame suppression member 151. The shape in which the flame suppressing member 151 and the insulating member 152 are coupled to each other, an area in contact with each other, and the like may vary according to individual internal structures of the secondary battery 100.
한편 절연 부재(152)에는 가스가 통과하기 위한 가스 홀(152a)이 관통하여 형성된다. 이때 가스 홀(152a)은 화염 억제 부재(151)의 공극과 적어도 부분적으로 연통한다. 따라서 이차 전지(100)의 내부에서 발생한 가스가 화염 억제 부재(151)의 공극 및 절연 부재(152)의 가스 홀(152a)을 통해, 탑 인슐레이터(150)를 관통하여 지나갈 수 있다. 이러한 가스 홀(152a)은 가스가 화염 억제 부재(151)의 공극을 통과한 후 절연 부재(152)에 의해 차단되지 않도록, 즉 가스가 원활하게 배출될 수 있도록, 적어도 화염 억제 부재(151)의 공극보다는 크게 형성될 것이다.Meanwhile, a gas hole 152a through which gas passes through is formed in the insulating member 152. At this time, the gas hole 152a is at least partially in communication with the gap of the flame suppression member 151. Therefore, the gas generated in the secondary battery 100 may pass through the top insulator 150 through the gap of the flame suppression member 151 and the gas hole 152a of the insulating member 152. The gas hole 152a is formed at least of the flame suppression member 151 so that the gas is not blocked by the insulating member 152 after passing through the air gap of the flame suppression member 151, that is, the gas can be smoothly discharged. It will form larger than the voids.
또한 가스 홀(152a)은 가스가 더 효율적으로 배출될 수 있도록, 전극 조립체(110)가 배치된 측으로부터 캡 플레이트(130)가 배치된 측으로 향하는 방향과 나란한 방향으로 형성될 수 있다. 만약 이차 전지(100)의 통상적인 사용 상태가 도 2에 도시된 바와 같다면 상기 홀은 절연 부재(152)를 연직 방향으로 관통하도록 형성될 수 있다.In addition, the gas hole 152a may be formed in a direction parallel to the direction from the side where the electrode assembly 110 is disposed to the side where the cap plate 130 is disposed so that the gas may be discharged more efficiently. If the normal use state of the secondary battery 100 is as shown in FIG. 2, the hole may be formed to penetrate the insulating member 152 in the vertical direction.
또한 가스 홀(152a)은 복수 개로 형성되어 서로 이격되도록 배열될 수 있다. 예컨대 각 가스 홀(152a)은 도 3에 도시된 바와 같이 직사각형의 단축을 따라 연장되도록 형성되어, 그 직사각형의 장축을 따라 서로 이격되도록 배열될 수 있다.In addition, a plurality of gas holes 152a may be formed to be spaced apart from each other. For example, each gas hole 152a may be formed to extend along a short axis of the rectangle as shown in FIG. 3, and may be arranged to be spaced apart from each other along the long axis of the rectangle.
또는 다른 예로서 도 6에 도시된 바와 같이 직사각형의 장축을 따라 연장되도록 형성되어, 그 직사각형의 단축을 따라 서로 이격되도록 배열될 수 있다.As another example, as shown in FIG. 6, they may be formed to extend along a long axis of the rectangle, and may be arranged to be spaced apart from each other along the short axis of the rectangle.
물론 또 다른 예로서 가스 홀(152a)은 도 7에 도시된 바와 같이 직사각형의 단축과 장축을 따라 서로 이격되도록 배열될 수도 있고, 도 8에 도시된 바와 같이 직사각형의 단축이나 장축에 대해 어긋나게 서로 이격되도록 배열될 수도 있다.Of course, as another example, the gas holes 152a may be arranged to be spaced apart from each other along the short axis and the long axis of the rectangle as shown in FIG. 7, and spaced apart from each other with respect to the short axis or the long axis of the rectangle, as shown in FIG. 8. It may be arranged to be.
이처럼 가스 홀(152a)의 폭, 길이, 개수 및 간격은 이차 전지(100)의 개별적인 설계 조건에 따라 얼마든지 달라질 수 있으므로, 여기서 더 구체적으로 특정하지는 않기로 한다.As such, the width, length, number, and spacing of the gas holes 152a may vary depending on individual design conditions of the secondary battery 100, and thus, the specific description is not provided herein.
한편 절연 부재(152)에는 제1 집전 판(121)과 제2 집전 판(122)이 각각 관통하여 지나가기 위한 제1 관통 홀(152b)과 제2 관통 홀(152c)이 더 형성될 수 있다.The insulating member 152 may further include a first through hole 152b and a second through hole 152c through which the first and second current collector plates 121 and 122 pass. .
이상에서 설명한 것은 본 발명에 따른 이차전지를 실시하기 위한 하나의 실시예에 불과한 것으로서, 본 발명은 상기한 실시예에 한정되지 않고, 이하의 특허청구범위에서 청구하는 바와 같이 본 발명의 요지를 벗어남 없이 당해 발명이 속하는 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변경실시가 가능한 범위까지 본 발명의 기술적 정신이 있다고 할 것이다.What has been described above is just one embodiment for carrying out the secondary battery according to the present invention, and the present invention is not limited to the above-described embodiment, and the present invention deviates from the gist of the present invention as claimed in the following claims. Without departing from the scope of the present invention, those skilled in the art will have the technical spirit of the present invention to the extent that various changes can be made.

Claims (14)

  1. 전극 조립체,Electrode assembly,
    상기 전극 조립체를 수용하는 케이스,A case accommodating the electrode assembly,
    상기 케이스에 결합되어 밀봉하는 캡 플레이트,A cap plate coupled to the case for sealing;
    절연성 소재로 이루어져, 상기 전극 조립체와 상기 캡 플레이트 사이에 설치되며, 유체가 관통하여 지나가기 위한 홀이 형성되는 절연 부재 및An insulating member made of an insulating material and installed between the electrode assembly and the cap plate and having a hole through which a fluid passes;
    상기 절연 부재와 결합되며, 상기 절연 부재의 홀보다 작은 공극이 복수 개로 형성되되, 상기 절연 부재의 홀과 상기 공극이 적어도 부분적으로 연통하도록 형성되는 화염 억제 부재를 포함하는 이차 전지.And a flame suppression member coupled to the insulating member and having a plurality of pores smaller than the holes of the insulating member, the flame suppressing member being formed to at least partially communicate with the holes of the insulating member.
  2. 제1항에 있어서,The method of claim 1,
    상기 절연 부재는 상기 화염 억제 부재 중 상기 전극 조립체에 가까운 일면의 적어도 일부를 덮도록 결합되는 이차 전지.The insulating member is coupled to cover at least a portion of one surface close to the electrode assembly of the flame suppression member.
  3. 제1항에 있어서,The method of claim 1,
    상기 절연 부재는 상기 화염 억제 부재 중 상기 캡 플레이트에 가까운 일면의 적어도 일부를 덮도록 결합되는 이차 전지.The insulating member is coupled to cover at least a portion of one surface close to the cap plate of the flame suppression member.
  4. 제1항에 있어서,The method of claim 1,
    상기 절연 부재는 상기 화염 억제 부재 중 상기 전극 조립체에 가까운 일면의 적어도 일부 및 상기 캡 플레이트에 가까운 타면의 적어도 일부를 덮도록 결합되는 이차 전지.The insulating member is coupled to cover at least a portion of one surface close to the electrode assembly and at least a portion of the other surface close to the cap plate among the flame suppression members.
  5. 제4항에 있어서,The method of claim 4, wherein
    상기 절연 부재와 상기 화염 억제 부재는 인서트 사출 성형으로 함께 제작되는 이차 전지.The insulating member and the flame suppression member are secondary batteries manufactured together by insert injection molding.
  6. 제1항에 있어서,The method of claim 1,
    상기 절연 부재의 홀은 복수 개로 형성되어 서로 이격되도록 배열되는 이차 전지.Secondary batteries are formed of a plurality of holes of the insulating member are arranged to be spaced apart from each other.
  7. 제6항에 있어서,The method of claim 6,
    상기 절연 부재는 실질적인 직사각형 또는 타원형으로 형성되고,The insulating member is formed in a substantially rectangular or oval,
    상기 절연 부재의 각 홀은 그 단축 방향을 따라 연장되도록 형성되어, 그 장축 방향을 따라 서로 이격되도록 배열되는 이차 전지.Each hole of the insulating member is formed to extend in the short axis direction, the secondary battery is arranged to be spaced apart from each other along the long axis direction.
  8. 제6항에 있어서,The method of claim 6,
    상기 절연 부재는 실질적인 직사각형 또는 타원형으로 형성되고,The insulating member is formed in a substantially rectangular or oval,
    상기 절연 부재의 각 홀은 그 장축 방향을 따라 연장되도록 형성되어, 그 단축 방향을 따라 서로 이격되도록 배열되는 이차 전지.Each hole of the insulating member is formed to extend along the major axis direction, the secondary battery is arranged to be spaced apart from each other along the minor axis direction.
  9. 제6항에 있어서,The method of claim 6,
    상기 절연 부재는 실질적인 직사각형 또는 타원형으로 형성되고,The insulating member is formed in a substantially rectangular or oval,
    상기 절연 부재의 각 홀은 그 단축 방향 및 장축 방향을 따라 서로 이격되도록 배열되는 이차 전지.Each hole of the insulating member is arranged to be spaced apart from each other along its short axis direction and long axis direction.
  10. 제6항에 있어서,The method of claim 6,
    상기 절연 부재는 실질적인 직사각형 또는 타원형으로 형성되고,The insulating member is formed in a substantially rectangular or oval,
    상기 절연 부재의 각 홀은 그 단축 방향 또는 장축 방향 중 적어도 어느 하나의 방향에 대해 어긋나게 서로 이격되도록 배열되는 이차 전지.Each hole of the insulating member is arranged so as to be spaced apart from each other with respect to at least one of the short axis direction and the long axis direction.
  11. 제1항에 있어서,The method of claim 1,
    상기 절연 부재의 홀은 상기 전극 조립체가 배치된 일측으로부터 상기 캡 플레이트가 배치된 타측으로 향하는 방향과 실질적으로 나란한 방향으로 관통하도록 형성되는 이차 전지.The hole of the insulating member is formed so as to penetrate in a direction substantially parallel to the direction from the one side in which the electrode assembly is disposed to the other side in which the cap plate is disposed.
  12. 제1항에 있어서,The method of claim 1,
    상기 화염 억제 부재는 내열성 소재로 이루어지는 이차 전지.The flame suppression member is a secondary battery made of a heat resistant material.
  13. 제1항에 있어서,The method of claim 1,
    상기 화염 억제 부재는 스테인레스강 또는 폴리페닐렌설파이드 중 적어도 어느 하나를 포함하는 소재로 이루어지는 이차 전지.The flame suppression member is a secondary battery comprising a material including at least one of stainless steel and polyphenylene sulfide.
  14. 제1항에 있어서,The method of claim 1,
    상기 화염 억제 부재는 메쉬 형태로 제작되는 이차 전지.The flame suppression member is a secondary battery produced in the form of a mesh.
PCT/KR2017/007702 2016-09-19 2017-07-18 Secondary battery WO2018052186A1 (en)

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