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WO2013141431A1 - Battery cell - Google Patents

Battery cell Download PDF

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Publication number
WO2013141431A1
WO2013141431A1 PCT/KR2012/002262 KR2012002262W WO2013141431A1 WO 2013141431 A1 WO2013141431 A1 WO 2013141431A1 KR 2012002262 W KR2012002262 W KR 2012002262W WO 2013141431 A1 WO2013141431 A1 WO 2013141431A1
Authority
WO
WIPO (PCT)
Prior art keywords
positive electrode
negative electrode
rivet
electrode tab
plates
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2012/002262
Other languages
French (fr)
Korean (ko)
Inventor
고성태
김광현
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kokam Ltd Co
Original Assignee
Kokam Ltd Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020120029470A external-priority patent/KR101327767B1/en
Priority claimed from KR1020120029478A external-priority patent/KR101359382B1/en
Application filed by Kokam Ltd Co filed Critical Kokam Ltd Co
Publication of WO2013141431A1 publication Critical patent/WO2013141431A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a battery cell.
  • a battery pack for storing electricity is configured by connecting a plurality of battery cells in series / parallel, and battery packs are widely used in portable batteries such as laptops. It is also used as a main power source for driving.
  • the battery cell constituting the battery pack includes a positive electrode plate, a negative electrode plate and a separator interposed between the positive electrode plate and the negative electrode plate, and the positive electrode plate and the negative electrode plate are alternately disposed.
  • the positive terminal tabs and the negative terminal tabs are connected by electrical and physical coupling such as ultrasonic welding or riveting.
  • the alternating positive plate, negative plate and separator are packaged by an exterior material or the like.
  • Each terminal tab connected to the positive electrode plate and the negative electrode plate may protrude connection parts due to ultrasonic welding or riveting method, which may damage the packaging material such as aluminum pouch film, and the metal at the connection area is directly insulated from the packaging material and electrically insulated. It has a problem that can be vulnerable.
  • the present invention provides a battery cell having an insulating member, such as an insulating coating or an insulating shrink tube, which prevents or suppresses damage to an exterior member by a portion connecting the positive electrode tabs and the negative electrode tabs, and improves electrical insulation with the exterior member.
  • an insulating member such as an insulating coating or an insulating shrink tube
  • the battery cell may include a plurality of positive electrode plates in which a plurality of sheets are stacked and positive electrode tabs face each other; Negative plates interposed between the positive plates and disposed with the negative electrode tabs facing each other; A separator interposed between the positive electrode plate and the negative electrode plate; A rivet comprising a first rivet penetrating the positive electrode tabs and a second rivet penetrating the negative electrode tabs; And an insulating coating covering the ends of the first and second rivets passing through the positive electrode tab and the negative electrode tab.
  • the insulating coating of the battery cell covers side surfaces of the positive electrode tab and the negative electrode tab.
  • a portion covering the first and second rivets of the insulating film of the battery cell is formed to have a first thickness, and a portion covering the side surfaces of the positive electrode tab and the negative electrode tab is formed to have a second thickness that is thinner than the first thickness.
  • the insulating coating film of the battery cell includes any one synthetic resin selected from the group consisting of polyethylene, polypropylene, and polycarbonate.
  • the battery cell may include an external connection terminal including a first external connection terminal coupled to the positive electrode tab and a second external connection terminal coupled to the negative electrode tab; And an exterior material surrounding the positive electrode plates, the negative electrode plates, and the insulating coating layer.
  • the battery cell may include a plurality of positive electrode plates in which a plurality of sheets are stacked and positive electrode tabs face each other; Negative plates interposed between the positive plates and disposed with the negative electrode tabs facing each other; A separator interposed between the positive electrode plate and the negative electrode plate; A rivet comprising a first rivet penetrating the positive electrode tabs and a second rivet penetrating the negative electrode tabs; And a contraction cover surrounding the side surfaces of the positive electrode tabs, the first rivet and the negative electrode tabs, and the second rivet, respectively.
  • the shrink cover of the battery cell includes a heat shrink tube that is contracted by heat.
  • Portions of the shrinkage cover of the battery cell corresponding to the end portions of the first and second rivets are formed to a first thickness, and portions corresponding to each side of the positive electrode tab and the negative electrode tabs are the first thickness. It is formed to a thinner second thickness.
  • the battery cell further includes an external connection terminal including a first external connection terminal coupled to the positive electrode tab and a second external connection terminal coupled to the negative electrode tab.
  • the battery cell further includes an exterior material surrounding the positive electrode plates, the negative electrode plates, and the shrinkage cover.
  • the battery cell according to the present invention it is possible to prevent the damage to the packaging material by the rivet by wrapping a rivet combining the positive electrode plate and the negative electrode plate using an insulating coating film.
  • Insulation coating film that wraps the rivet to prevent damage to the exterior material is because the synthetic resin melted by the volatile solvent is used to facilitate the automation by the resin coating automation equipment has the effect of improving the productivity more.
  • FIG. 1 is an external perspective view of a battery cell according to a first exemplary embodiment of the present invention.
  • 2 to 4 are plan views illustrating the positive electrode plate, the negative electrode plate, and the separator of the battery cell according to the first embodiment of the present invention.
  • FIG. 5 is an exploded perspective view illustrating an exploded view of the positive electrode plate, the negative electrode plate, and the rivet of the battery cell according to the first embodiment of the present invention.
  • FIG. 6 is a cross-sectional view taken along the line II ′ of FIG. 5.
  • FIG. 7 is an enlarged view of a portion 'A' of FIG. 6.
  • FIG. 8 is a perspective view showing an insulating coating film surrounding the positive electrode tab.
  • FIG. 9 is a cross-sectional view taken along the line II-II 'of FIG. 8.
  • FIG. 10 is an exploded perspective view illustrating a positive electrode plate, a negative electrode plate, a rivet, and a shrink cover of a battery cell according to a second embodiment of the present invention.
  • FIG. 11 is a cross-sectional view of the positive electrode tab and the shrinkage cover of FIG.
  • FIG. 12 is a cross-sectional view of the positive electrode tab and the shrinkage cover according to another embodiment of the present invention.
  • FIG. 1 is an external perspective view of a battery cell according to a first exemplary embodiment of the present invention.
  • 2 to 4 are plan views illustrating the positive electrode plate, the negative electrode plate, and the separator of the battery cell according to the first embodiment of the present invention.
  • 5 is an exploded perspective view illustrating an exploded view of the positive electrode plate, the negative electrode plate, and the rivet of the battery cell according to the first embodiment of the present invention.
  • 6 is a cross-sectional view taken along the line II ′ of FIG. 5.
  • FIG. 7 is an enlarged view of a portion 'A' of FIG. 6.
  • 8 is a perspective view showing an insulating coating film surrounding the positive electrode tab.
  • FIG. 9 is a cross-sectional view taken along the line II-II 'of FIG. 8.
  • the battery cell 100 forming a battery pack includes a positive electrode plate 110, a negative electrode plate 120, a separator 130, an external connection terminal 140, a rivet 150, The insulating coating film 160 and the exterior material 170 are included.
  • the positive electrode plate 110 includes a metal plate having a thin thickness and a positive electrode active material formed on a surface thereof.
  • the positive electrode plate 110 may be formed in, for example, a rectangular parallelepiped plate shape.
  • a positive electrode tab 115 protrudes from one side edge of the positive electrode plate 110 to provide a positive power to the positive electrode plate 110.
  • the positive electrode tab 115 may have a through hole 117 through which the rivet 150 to be described later passes.
  • At least one through hole 117 may be formed in the positive electrode tab 115 of the positive electrode plate 110.
  • the negative electrode plate 120 includes a metal plate having a thin thickness and a negative electrode active material formed on a surface thereof.
  • the negative electrode plate 120 may be formed, for example, in a rectangular plate shape, and the negative electrode plate 120 may be formed in the same shape and the same size as the positive electrode plate 120.
  • a negative electrode tab 125 protrudes from one edge of the negative electrode plate 110 to provide a power having a second polarity to the negative electrode plate 120.
  • the negative electrode tab 125 may have a through hole 127 through which the rivet 150 to be described later passes.
  • the positive electrode plate 110 is disposed in a shape in which a plurality of sheets are stacked, and the positive electrode tabs 115 of the plurality of stacked positive electrode plates 110 are disposed to face each other.
  • the negative electrode plate 120 is interposed between the opposite positive electrode plates 110, and the negative electrode tabs 125 of the negative electrode plates 120 interposed between the positive electrode plates 110 are disposed to face each other. That is, the positive electrode plate 110 and the negative electrode plate 120 are alternately arranged.
  • the separator 130 is disposed between the anode plates 110 and the cathode plates 120 that are alternately disposed, and a solid electrolyte is coated on the surface of the separator 130.
  • the external connection terminal 140 includes a first external connection terminal 142 and a second external connection terminal 144.
  • the first external connection terminal 142 is connected to the outermost positive electrode tab 115 among the positive electrode tabs 115, and also corresponds to the through hole 117 of the positive electrode tab 115 in the first external connection terminal 142. Through holes (not shown) may be formed.
  • the second external connection terminal 144 is connected to the outermost negative electrode tab 125 among the negative electrode tabs 125, and the second external connection terminal 144 also corresponds to the through hole 127 of the negative electrode tab 125. Through holes (not shown) may be formed.
  • the external connection terminal 140 is electrically connected to the positive electrode tab 115 and the negative electrode tab 125, respectively, to electrically connect the plurality of battery cells 100 in parallel to form a battery pack.
  • the positive electrode plates 110 are spaced apart from each other, and thus the positive electrode tabs 115 of the positive electrode plates 110 are disposed. They are also spaced apart from each other.
  • the rivet 150 electrically connects the positive electrode tabs 115 of the positive electrode plates 110 spaced apart from each other.
  • a rivet 150 that electrically / mechanically connects the positive electrode tabs 115 is defined as a first rivet 152, and the first rivet 152 is a through hole of the positive electrode tabs 115 of the positive electrode plate 110.
  • the positive electrode tabs 115 are electrically / mechanically connected through the 117 sequentially.
  • the plurality of stacked positive electrode plates 110 are electrically connected to each other by the first rivets 152 while being in close contact with each other by the first rivets 152.
  • at least one, preferably at least two, first rivets 152 may be coupled to the positive electrode tabs 115 of the positive electrode plate 110.
  • the negative electrode plates 120 are spaced apart from each other, and thus the negative electrode tabs 125 of the negative electrode plates 120 are separated from each other. They are also spaced apart from each other.
  • the rivet 150 electrically connects the negative electrode tabs 125 of the negative electrode plates 120 spaced apart from each other.
  • a rivet 150 that electrically / mechanically connects the negative electrode tabs 125 is defined as a second rivet 154, and the second rivet 154 is a through hole of the negative electrode tabs 125 of the negative electrode plate 120.
  • the negative electrode tabs 125 are electrically / mechanically connected while sequentially passing through 127.
  • the stacked plurality of negative electrode plates 120 are in close contact with each other by the second rivet 154 and are electrically connected to each other by the second rivet 154.
  • at least one, preferably at least two, second rivets 154 may be coupled to the negative electrode tabs 125 of the negative electrode plate 120.
  • the length of the first rivet 152 connecting the positive electrode tab 115 of the positive electrode plate 110 is formed longer than the total thickness of all the positive electrode tabs 115 facing each other.
  • the length of the second rivets 154 connecting the negative electrode tabs 125 of the negative electrode plate 120 is longer than the total thickness of all the negative electrode tabs 125 facing each other.
  • first and second rivets 152, 154 are shorter than the overall thickness of the positive electrode tabs 115 and the negative electrode tabs 125, some of the positive electrode tabs 115 and the negative electrode tabs 125 may be formed of the first and second rivets 152, 154. This is because they are not electrically / mechanically connected to the second rivets 152 and 154.
  • the ends of the first and second rivets 152 and 154 may be formed in the positive electrode tab 115.
  • the end portions of the protruding first and second rivets 152 and 154 that protrude outwardly of the negative electrode tabs 125 may penetrate the exterior member 170 having a thin thickness or damage the exterior member 170.
  • the insulating coating 160 wraps around the end of the first rivet 152 penetrating the positive electrode tab 115 and the end of the second rivet 154 penetrating the negative electrode tab 125.
  • the end 170 of the first rivet 152 and / or the end of the second rivet 154 may be prevented from being damaged.
  • Synthetic resin constituting the insulating coating 160 may include any one of polyethylene, polypropylene, and polycarbonate. Alternatively, the insulating coating 160 may use various synthetic resins that are melted by the volatile solvent and then cured by volatilization of the volatile solvent.
  • the insulating coating 160 is the end of the first rivet 152 protruding through the positive electrode tab 115 and the second rivet 152 protruding through the negative electrode tab 125. The ends may optionally be covered.
  • the insulating coating 160 may be formed in the form of a thin film covering the outermost anode tab 115 penetrated by the first rivet 152 and the outermost cathode tab 125 penetrated by the second rivet 154. Can be. Alternatively, the insulating coating 160 may cover the outermost positive electrode tab 115 penetrated by the first rivet 152 and the outermost negative electrode tab 125 penetrated by the second rivet 152 in an island shape. It's okay.
  • a portion of the tab 125 covering the end portion of the second rivet 154 may be formed to have a thin first thickness T1.
  • the first thickness T1 of the insulating coating layer 160 may be a protruding length of the first rivet 152 protruding from the positive electrode tab 115 and a protruding length of the second rivet 154 protruding from the negative electrode tab 125. Rather than being formed thicker.
  • portion covering the side surface of the negative electrode tab 115 and the portion covering the side surface of the negative electrode tab 125 of the insulating coating layer 160 may be formed to have a second thickness thinner than the first thickness T1.
  • the insulating coating 160 is the side of the positive electrode tab 115 and the end of the first rivet 152 and the side of the negative electrode tab 125 and the second rivet (melted by volatile solvent) By covering the ends of the 154, damage to the exterior material 170 may be prevented by the ends of the first and second rivets 152 and 154.
  • FIG. 10 is an exploded perspective view illustrating a positive electrode plate, a negative electrode plate, a rivet, and a shrink cover of a battery cell according to a second embodiment of the present invention.
  • FIG. 11 is a cross-sectional view of the positive electrode tab and the shrinkage cover of FIG. 12 is a cross-sectional view of the positive electrode tab and the shrinkage cover according to another embodiment of the present invention.
  • the battery cell according to the second embodiment of the present invention is substantially the same as the battery cell according to the first embodiment except for the shrink cover.
  • the battery cell 100 constituting the battery pack includes a positive electrode plate 110, a negative electrode plate 120, a separator 130, an external connection terminal 140, a rivet 150, a shrink cover 160, and an exterior material 170. ).
  • Shrink cover 160 includes first rivet 152 protruding from positive side tab and positive side tab 115 and second rivet protruding side from negative side tab and negative side tab 125. Wrapping 154 prevents the exterior material 170 from being damaged by the first rivet 152 and / or the second rivet 154.
  • the shrinkage cover 160 not only prevents damage to the exterior material 170, but also enables assembly by an automated process rather than manual work.
  • the shrink cover 160 is formed in a tube shape in which both ends are opened and inserted into the positive electrode tab 115 and the negative electrode tab 125, and the shrink cover 160 is inserted into the positive electrode tab 115 and the negative electrode tab 125. And a heat shrink tube that is then contracted by the provided heat.
  • the shrink cover 160 may be formed to have a uniform thickness T1, and the shrink cover 160 may include the positive electrode tab 115 and the second rivet 154 to which the first rivet 152 is coupled. Heat is applied to the shrink cover 160 in a state in which the negative electrode tab 125 is coupled to each other so that the shrink cover 160 includes the positive electrode tab 115, the first rivet 152, the negative electrode tab 125, and the second. Wrap rivet 154.
  • the shrink cover 165 is formed to have a different thickness. Specifically, the shrink cover 165 corresponding to the end of the first rivet 152 penetrating the positive electrode tab 115 and the end of the second rivet 154 penetrating the negative electrode tab 125 of the shrink cover 165. Is formed to a first thickness T2. Meanwhile, a portion of the contraction cover 165 surrounding the side surface of the positive electrode tab 115 and the side surface of the negative electrode tab 125 may be formed to have a second thickness T3 thinner than the first thickness T2.
  • the contraction cover 165 corresponding to the end of the first rivet 152 penetrating the positive electrode tab 115 and the end of the second rivet 154 penetrating the negative electrode tab 125 is provided.
  • the bending of the contraction cover 165 corresponding to the ends of the first and second rivets 152 and 154 may be further reduced, thereby greatly suppressing or preventing damage to the exterior material 170.
  • Insulation coating film that wraps the rivet to prevent damage to the exterior material is because the synthetic resin melted by the volatile solvent is used to facilitate the automation by the resin coating automation equipment has the effect of improving the productivity more.
  • the present invention can be used for a battery cell of an electric vehicle battery pack or a battery cell of an industrial battery pack.

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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)

Description

배터리 셀Battery cell

본 발명은 배터리 셀에 관한 것이다.The present invention relates to a battery cell.

일반적으로, 전기를 저장하는 배터리 팩(battery pack)은 복수개의 배터리 셀(battery cell)을 직/병렬 연결하여 구성되며, 배터리 팩은 노트북 등과 같은 휴대용 배터리에 널리 사용되고 있으나, 최근 전기 자동차의 모터를 구동하기 위한 주전원으로도 사용되고 있다.In general, a battery pack for storing electricity is configured by connecting a plurality of battery cells in series / parallel, and battery packs are widely used in portable batteries such as laptops. It is also used as a main power source for driving.

배터리 팩을 이루는 배터리 셀은 양극판, 음극판 및 양극판과 음극판 사이에 개재된 분리막을 포함하며, 양극판 및 음극판은 상호 교대로 배치된다.The battery cell constituting the battery pack includes a positive electrode plate, a negative electrode plate and a separator interposed between the positive electrode plate and the negative electrode plate, and the positive electrode plate and the negative electrode plate are alternately disposed.

양극판과 음극판에서 각각 양극 단자 탭 및 각 음극 단자 탭들은 초음파 융착 또는 리벳팅과 같은 전기적, 물리적 결합에 의하여 연결된다.In the positive and negative plates, the positive terminal tabs and the negative terminal tabs, respectively, are connected by electrical and physical coupling such as ultrasonic welding or riveting.

또한, 교대로 배치된 양극판, 음극판 및 분리막은 외장재 등에 의하여 포장된다.In addition, the alternating positive plate, negative plate and separator are packaged by an exterior material or the like.

양극판 및 음극판에 연결되는 각각의 단자 탭은 초음파 융착 또는 리벳팅 방법으로 인해 연결부위가 돌출되어 알루미늄 파우치 필름 등 포장재를 손상시킬 우려가 있으며, 연결부위의 금속이 포장재와 직접적으로 접촉되어 전기적으로 절연이 취약할 수 있는 문제점을 갖는다.Each terminal tab connected to the positive electrode plate and the negative electrode plate may protrude connection parts due to ultrasonic welding or riveting method, which may damage the packaging material such as aluminum pouch film, and the metal at the connection area is directly insulated from the packaging material and electrically insulated. It has a problem that can be vulnerable.

본 발명은 양극 탭들 및 음극 탭들을 연결하는 부위에 의한 외장재의 손상을 방지 또는 억제하며, 외장재와의 전기적 절연성을 향상시킨 절연 도막 또는 절연성 수축 튜브와 같은 절연 부재를 갖는 배터리 셀을 제공한다.The present invention provides a battery cell having an insulating member, such as an insulating coating or an insulating shrink tube, which prevents or suppresses damage to an exterior member by a portion connecting the positive electrode tabs and the negative electrode tabs, and improves electrical insulation with the exterior member.

본 발명이 이루고자 하는 기술적 과제는 이상에서 언급한 기술적 과제로 제한되지 않으며 언급되지 않은 또 다른 기술적 과제들은 아래의 기재로부터 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 명확하게 이해될 수 있을 것이다.The technical problem to be achieved by the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

일실시예로서, 배터리 셀은 복수매가 적층 되며 양극 탭이 상호 마주하게 배치된 양극판들; 상기 양극판들 사이에 개재되며 음극 탭이 상호 마주하게 배치된 음극판들; 상기 양극판 및 음극판들 사이에 개재된 분리막; 상기 양극 탭들을 관통하는 제1 리벳, 상기 음극 탭들을 관통하는 제2 리벳을 포함하는 리벳; 및 상기 양극 탭 및 상기 음극 탭을 관통한 상기 제1 및 제2 리벳들의 단부를 덮는 절연 도막을 포함한다.In an embodiment, the battery cell may include a plurality of positive electrode plates in which a plurality of sheets are stacked and positive electrode tabs face each other; Negative plates interposed between the positive plates and disposed with the negative electrode tabs facing each other; A separator interposed between the positive electrode plate and the negative electrode plate; A rivet comprising a first rivet penetrating the positive electrode tabs and a second rivet penetrating the negative electrode tabs; And an insulating coating covering the ends of the first and second rivets passing through the positive electrode tab and the negative electrode tab.

배터리 셀의 상기 절연 도막은 상기 양극 탭 및 상기 음극 탭의 측면을 덮는다.The insulating coating of the battery cell covers side surfaces of the positive electrode tab and the negative electrode tab.

배터리 셀의 상기 절연 도막 중 상기 제1 및 제2 리벳들을 덮는 부분은 제1 두께로 형성되고, 상기 양극 탭 및 상기 음극 탭의 측면을 덮는 부분은 상기 제1 두께보다 얇은 제2 두께로 형성된다.A portion covering the first and second rivets of the insulating film of the battery cell is formed to have a first thickness, and a portion covering the side surfaces of the positive electrode tab and the negative electrode tab is formed to have a second thickness that is thinner than the first thickness. .

배터리 셀의 상기 절연 도막은 폴리에틸렌(Polyethylene), 폴리프로필렌(Polypropylene) 및 폴리카보네이트(polycarbonate)로 이루어진 군으로부터 선택된 어느 하나의 합성 수지를 포함한다.The insulating coating film of the battery cell includes any one synthetic resin selected from the group consisting of polyethylene, polypropylene, and polycarbonate.

배터리 셀은 상기 양극 탭에 결합 된 제1 외부 접속 단자 및 상기 음극 탭에 결합 된 제2 외부 접속 단자를 포함하는 외부 접속 단자; 및 상기 양극판들, 상기 음극판들 및 상기 절연 도막을 감싸는 외장재를 더 포함한다.The battery cell may include an external connection terminal including a first external connection terminal coupled to the positive electrode tab and a second external connection terminal coupled to the negative electrode tab; And an exterior material surrounding the positive electrode plates, the negative electrode plates, and the insulating coating layer.

일실시예로서, 배터리 셀은 복수매가 적층 되며 양극 탭이 상호 마주하게 배치된 양극판들; 상기 양극판들 사이에 개재되며 음극 탭이 상호 마주하게 배치된 음극판들; 상기 양극판 및 음극판들 사이에 개재된 분리막; 상기 양극 탭들을 관통하는 제1 리벳, 상기 음극 탭들을 관통하는 제2 리벳을 포함하는 리벳; 및 상기 양극 탭들의 측면과 상기 제1 리벳 및 상기 음극 탭들의 측면 및 상기 제2 리벳을 각각 감싸는 수축 커버를 포함한다.In an embodiment, the battery cell may include a plurality of positive electrode plates in which a plurality of sheets are stacked and positive electrode tabs face each other; Negative plates interposed between the positive plates and disposed with the negative electrode tabs facing each other; A separator interposed between the positive electrode plate and the negative electrode plate; A rivet comprising a first rivet penetrating the positive electrode tabs and a second rivet penetrating the negative electrode tabs; And a contraction cover surrounding the side surfaces of the positive electrode tabs, the first rivet and the negative electrode tabs, and the second rivet, respectively.

배터리 셀의 상기 수축 커버는 열에 의하여 수축되는 열 수축 튜브를 포함한다.The shrink cover of the battery cell includes a heat shrink tube that is contracted by heat.

배터리 셀의 상기 수축 커버 중 상기 제1 및 제2 리벳들의 상기 각 단부들과 대응하는 부분은 제1 두께로 형성되며, 상기 양극 탭 및 상기 음극 탭들의 각 측면과 대응하는 부분은 상기 제1 두께보다 얇은 제2 두께로 형성된다.Portions of the shrinkage cover of the battery cell corresponding to the end portions of the first and second rivets are formed to a first thickness, and portions corresponding to each side of the positive electrode tab and the negative electrode tabs are the first thickness. It is formed to a thinner second thickness.

배터리 셀은 상기 양극 탭에 결합 된 제1 외부 접속 단자 및 상기 음극 탭에 결합 된 제2 외부 접속 단자를 포함하는 외부 접속 단자를 더 포함한다.The battery cell further includes an external connection terminal including a first external connection terminal coupled to the positive electrode tab and a second external connection terminal coupled to the negative electrode tab.

배터리 셀은 상기 양극판들, 상기 음극판들 및 상기 수축 커버를 감싸는 외장재를 더 포함한다.The battery cell further includes an exterior material surrounding the positive electrode plates, the negative electrode plates, and the shrinkage cover.

본 발명에 따른 배터리 셀에 의하면, 양극판 및 음극판을 결합하는 리벳을 절연 도막을 이용하여 감싸 리벳에 의한 외장재의 손상을 방지할 수 있다. 리벳을 감싸 외장재의 손상을 방지하는 절연 도막은 휘발성 용제에 의하여 녹은 합성수지를 이용하기 때문에 수지 도포 자동화 설비에 의하여 자동화를 쉽게 할 수 있기 때문에 생산성을 보다 향상시킬 수 있는 효과를 갖는다.According to the battery cell according to the present invention, it is possible to prevent the damage to the packaging material by the rivet by wrapping a rivet combining the positive electrode plate and the negative electrode plate using an insulating coating film. Insulation coating film that wraps the rivet to prevent damage to the exterior material is because the synthetic resin melted by the volatile solvent is used to facilitate the automation by the resin coating automation equipment has the effect of improving the productivity more.

또한, 양극판 및 음극판을 결합하는 리벳을 열에 의하여 수축되는 열 수축 커버를 이용하여 감싸 리벳에 의한 외장재의 손상을 방지할 수 있다. 리벳을 감싸 외장재의 손상을 방지하는 수축 커버는 자동화 공정에 의하여 양극 탭 또는 음극 탭과 상호 결합할 수 있기 때문에 생산성을 보다 향상시킬 수 있는 효과를 갖는다.In addition, it is possible to prevent damage to the packaging material by the rivet by using a heat shrink cover that is shrunk by heat to the rivet bonding the positive plate and the negative plate. The shrinkage cover that covers the rivets and prevents damage to the exterior material has an effect of further improving productivity since the shrinkage cover can be mutually combined with the positive electrode tab or the negative electrode tab by an automated process.

도 1은 본 발명의 제1 실시예에 따른 배터리 셀의 외관 사시도이다.1 is an external perspective view of a battery cell according to a first exemplary embodiment of the present invention.

도 2 내지 도 4는 본 발명의 제1 실시예에 따른 배터리 셀의 양극판, 음극판 및 분리막을 도시한 평면도이다.2 to 4 are plan views illustrating the positive electrode plate, the negative electrode plate, and the separator of the battery cell according to the first embodiment of the present invention.

도 5은 본 발명의 제1 실시예에 따른 배터리 셀의 양극판, 음극판, 리벳을 분해 도시한 분해 사시도이다.5 is an exploded perspective view illustrating an exploded view of the positive electrode plate, the negative electrode plate, and the rivet of the battery cell according to the first embodiment of the present invention.

도 6은 도 5의 I-I' 선을 따라 절단한 단면도이다.6 is a cross-sectional view taken along the line II ′ of FIG. 5.

도 7은 도 6의 'A' 부분 확대도이다.FIG. 7 is an enlarged view of a portion 'A' of FIG. 6.

도 8은 양극 탭을 감싸는 절연 도막을 도시한 사시도이다.8 is a perspective view showing an insulating coating film surrounding the positive electrode tab.

도 9는 도 8의 II-II' 선을 따라 절단한 단면도이다.FIG. 9 is a cross-sectional view taken along the line II-II 'of FIG. 8.

도 10 본 발명의 제2 실시예에 따른 배터리 셀의 양극판, 음극판, 리벳 및 수축 커버를 도시한 분해 사시도이다.10 is an exploded perspective view illustrating a positive electrode plate, a negative electrode plate, a rivet, and a shrink cover of a battery cell according to a second embodiment of the present invention.

도 11은 도 10의 양극 탭 및 수축 커버를 횡 방향으로 절단한 단면도이다.FIG. 11 is a cross-sectional view of the positive electrode tab and the shrinkage cover of FIG.

도 12는 본 발명의 다른 실시예에 따른 양극 탭 및 수축 커버를 횡 방향으로 절단한 단면도이다.12 is a cross-sectional view of the positive electrode tab and the shrinkage cover according to another embodiment of the present invention.

이하, 첨부된 도면들을 참조하여 본 발명에 따른 다양한 실시예들을 상세히 설명한다. 이 과정에서 도면에 도시된 구성요소의 크기나 형상 등은 설명의 명료성과 편의상 과장되게 도시될 수 있다. 또한, 본 발명의 구성 및 작용을 고려하여 특별히 정의된 용어들은 사용자, 운용자의 의도 또는 관례에 따라 달라질 수 있다. 이러한 용어들에 대한 정의는 본 명세서 전반에 걸친 내용을 토대로 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야 한다.Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In this process, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms that are specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. Definitions of these terms should be interpreted as meanings and concepts corresponding to the technical spirit of the present invention based on the contents throughout the present specification.

실시예 1Example 1

도 1은 본 발명의 제1 실시예에 따른 배터리 셀의 외관 사시도이다. 도 2 내지 도 4는 본 발명의 제1 실시예에 따른 배터리 셀의 양극판, 음극판 및 분리막을 도시한 평면도이다. 도 5은 본 발명의 제1 실시예에 따른 배터리 셀의 양극판, 음극판, 리벳을 분해 도시한 분해 사시도이다. 도 6은 도 5의 I-I' 선을 따라 절단한 단면도이다. 도 7은 도 6의 'A' 부분 확대도이다. 도 8은 양극 탭을 감싸는 절연 도막을 도시한 사시도이다. 도 9는 도 8의 II-II' 선을 따라 절단한 단면도이다.1 is an external perspective view of a battery cell according to a first exemplary embodiment of the present invention. 2 to 4 are plan views illustrating the positive electrode plate, the negative electrode plate, and the separator of the battery cell according to the first embodiment of the present invention. 5 is an exploded perspective view illustrating an exploded view of the positive electrode plate, the negative electrode plate, and the rivet of the battery cell according to the first embodiment of the present invention. 6 is a cross-sectional view taken along the line II ′ of FIG. 5. FIG. 7 is an enlarged view of a portion 'A' of FIG. 6. 8 is a perspective view showing an insulating coating film surrounding the positive electrode tab. FIG. 9 is a cross-sectional view taken along the line II-II 'of FIG. 8.

도 1 내지 도 9들을 참조하면, 배터리 팩(battery pack)을 이루는 배터리 셀(100)은 양극판(110), 음극판(120), 분리막(130), 외부 접속 단자(140), 리벳(150), 절연 도막(160) 및 외장재(170)를 포함한다.1 to 9, the battery cell 100 forming a battery pack includes a positive electrode plate 110, a negative electrode plate 120, a separator 130, an external connection terminal 140, a rivet 150, The insulating coating film 160 and the exterior material 170 are included.

도 2 및 도 5를 참조하면, 본 발명의 일실시예에서, 양극판(110)은 얇은 두께를 갖고 양극 활물질이 표면에 형성된 금속판을 포함한다. 양극판(110)은, 예를 들어, 직육면체 플레이트 형상으로 형성될 수 있다.2 and 5, in one embodiment of the present invention, the positive electrode plate 110 includes a metal plate having a thin thickness and a positive electrode active material formed on a surface thereof. The positive electrode plate 110 may be formed in, for example, a rectangular parallelepiped plate shape.

양극판(110)의 일측 테두리로부터는 양극판(110)에 양극성을 갖는 전원을 제공하기 위한 양극 탭(115)이 돌출된다. 양극 탭(115)에는 후술 될 리벳(150)이 관통하기 위한 관통홀(117)이 형성될 수 있다.A positive electrode tab 115 protrudes from one side edge of the positive electrode plate 110 to provide a positive power to the positive electrode plate 110. The positive electrode tab 115 may have a through hole 117 through which the rivet 150 to be described later passes.

본 발명의 일실시예에서, 관통홀(117)은 적어도 하나가 양극판(110)의 양극 탭(115)에 형성될 수 있다.In one embodiment of the present invention, at least one through hole 117 may be formed in the positive electrode tab 115 of the positive electrode plate 110.

도 3 및 도 5를 참조하면, 음극판(120)은 얇은 두께를 갖고 음극 활물질이 표면에 형성된 금속판을 포함한다. 음극판(120)은, 예를 들어, 직육면체 플레이트 형상으로 형성될 수 있고, 음극판(120)은 양극판(120)과 동일한 형상 및 동일한 사이즈로 형성될 수 있다.3 and 5, the negative electrode plate 120 includes a metal plate having a thin thickness and a negative electrode active material formed on a surface thereof. The negative electrode plate 120 may be formed, for example, in a rectangular plate shape, and the negative electrode plate 120 may be formed in the same shape and the same size as the positive electrode plate 120.

음극판(110)의 일측 테두리로부터는 음극판(120)에 제2 극성을 갖는 전원을 제공하기 위한 음극 탭(125)가 돌출된다. 음극 탭(125)에는 후술 될 리벳(150)이 관통하기 위한 관통홀(127)이 형성될 수 있다.A negative electrode tab 125 protrudes from one edge of the negative electrode plate 110 to provide a power having a second polarity to the negative electrode plate 120. The negative electrode tab 125 may have a through hole 127 through which the rivet 150 to be described later passes.

도 5 내지 도 7을 참조하면, 양극판(110)은 복수매가 적층된 형상으로 배치되며, 복수매가 적층된 양극판(110)들의 각 양극 탭(115)들은 상호 마주하게 배치된다.5 to 7, the positive electrode plate 110 is disposed in a shape in which a plurality of sheets are stacked, and the positive electrode tabs 115 of the plurality of stacked positive electrode plates 110 are disposed to face each other.

음극판(120)은 마주하는 양극판(110)들의 사이에 개재되며, 양극판(110)들의 사이에 개재된 음극판(120)들의 음극 탭(125)들은 상호 마주하게 배치된다. 즉, 양극판(110) 및 음극판(120)은 교대로 배치된다.The negative electrode plate 120 is interposed between the opposite positive electrode plates 110, and the negative electrode tabs 125 of the negative electrode plates 120 interposed between the positive electrode plates 110 are disposed to face each other. That is, the positive electrode plate 110 and the negative electrode plate 120 are alternately arranged.

도 4를 참조하면, 분리막(130)은 교대로 배치된 양극판(110) 및 음극판(120)의 사이에 배치되며, 분리막(130)의 표면에는 고체 전해질이 코팅되어 있다.Referring to FIG. 4, the separator 130 is disposed between the anode plates 110 and the cathode plates 120 that are alternately disposed, and a solid electrolyte is coated on the surface of the separator 130.

도 1 및 도 5를 참조하면, 외부 접속 단자(140)는 제1 외부 접속 단자(142) 및 제2 외부 접속 단자(144)를 포함한다.1 and 5, the external connection terminal 140 includes a first external connection terminal 142 and a second external connection terminal 144.

제1 외부 접속 단자(142)는 양극 탭(115)들 중 가장 바깥쪽 양극 탭(115)에 접속되며 제1 외부 접속 단자(142)에도 양극 탭(115)의 관통홀(117)과 대응하는 관통홀(미도시)이 형성될 수 있다.The first external connection terminal 142 is connected to the outermost positive electrode tab 115 among the positive electrode tabs 115, and also corresponds to the through hole 117 of the positive electrode tab 115 in the first external connection terminal 142. Through holes (not shown) may be formed.

제2 외부 접속 단자(144)는 음극 탭(125)들 중 가장 바깥쪽 음극 탭(125)에 접속되며 제2 외부 접속 단자(144)에도 음극 탭(125)의 관통홀(127)과 대응하는 관통홀(미도시)이 형성될 수 있다.The second external connection terminal 144 is connected to the outermost negative electrode tab 125 among the negative electrode tabs 125, and the second external connection terminal 144 also corresponds to the through hole 127 of the negative electrode tab 125. Through holes (not shown) may be formed.

외부 접속 단자(140)는 복수개의 배터리 셀(100)들을 전기적으로 병렬 방식으로 연결하여 배터리 팩을 형성하기 위해 양극 탭(115) 및 음극 탭(125)에 각각 전기적으로 접속된다.The external connection terminal 140 is electrically connected to the positive electrode tab 115 and the negative electrode tab 125, respectively, to electrically connect the plurality of battery cells 100 in parallel to form a battery pack.

도 5 및 도 6을 참조하면, 양극판(110)들의 사이에는 분리막(130) 및 음극판(120)이 개재되어 있기 때문에 양극판(110)들은 상호 이격 되고 이로 인해 양극판(110)들의 양극 탭(115)들 역시 상호 이격 되어 있다.5 and 6, since the separator 130 and the negative electrode plate 120 are interposed between the positive electrode plates 110, the positive electrode plates 110 are spaced apart from each other, and thus the positive electrode tabs 115 of the positive electrode plates 110 are disposed. They are also spaced apart from each other.

리벳(150)은 상호 이격 된 양극판(110)들의 양극 탭(115)들을 상호 전기적/기계적으로 연결한다.The rivet 150 electrically connects the positive electrode tabs 115 of the positive electrode plates 110 spaced apart from each other.

아하, 양극 탭(115)들을 전기적/기계적으로 연결하는 리벳(150)은 제1 리벳(152)으로서 정의되며, 제1 리벳(152)은 양극판(110)의 양극 탭(115)들의 관통홀(117)을 순차적으로 관통하면서 양극 탭(115)들을 전기적/기계적으로 연결한다.A rivet 150 that electrically / mechanically connects the positive electrode tabs 115 is defined as a first rivet 152, and the first rivet 152 is a through hole of the positive electrode tabs 115 of the positive electrode plate 110. The positive electrode tabs 115 are electrically / mechanically connected through the 117 sequentially.

따라서, 적층된 복수개의 양극판(110)들은 제1 리벳(152)에 의하여 상호 밀착되면서 제1 리벳(152)에 의하여 모두 전기적으로 연결된다. 본 발명의 일실시예에서, 제1 리벳(152)은 적어도 하나, 바람직하게 적어도 2 개가 양극판(110)의 양극 탭(115)들에 결합 될 수 있다.Therefore, the plurality of stacked positive electrode plates 110 are electrically connected to each other by the first rivets 152 while being in close contact with each other by the first rivets 152. In one embodiment of the invention, at least one, preferably at least two, first rivets 152 may be coupled to the positive electrode tabs 115 of the positive electrode plate 110.

도 5 및 도 6을 참조하면, 음극판(110)들의 사이에는 분리막(130) 및 양극판(110)이 개재되어 있기 때문에 음극판(120)들은 상호 이격 되고 이로 인해 음극판(120)들의 음극 탭(125)들 역시 상호 이격 되어 있다.5 and 6, since the separator 130 and the positive electrode plate 110 are interposed between the negative electrode plates 110, the negative electrode plates 120 are spaced apart from each other, and thus the negative electrode tabs 125 of the negative electrode plates 120 are separated from each other. They are also spaced apart from each other.

리벳(150)은 상호 이격 된 음극판(120)들의 음극 탭(125)들을 상호 전기적/기계적으로 연결한다.The rivet 150 electrically connects the negative electrode tabs 125 of the negative electrode plates 120 spaced apart from each other.

아하, 음극 탭(125)들을 전기적/기계적으로 연결하는 리벳(150)은 제2 리벳(154)으로서 정의되며, 제2 리벳(154)은 음극판(120)의 음극 탭(125)들의 관통홀(127)을 순차적으로 관통하면서 음극 탭(125)들을 전기적/기계적으로 연결한다.A rivet 150 that electrically / mechanically connects the negative electrode tabs 125 is defined as a second rivet 154, and the second rivet 154 is a through hole of the negative electrode tabs 125 of the negative electrode plate 120. The negative electrode tabs 125 are electrically / mechanically connected while sequentially passing through 127.

따라서, 적층된 복수개의 음극판(120)들은 제2 리벳(154)에 의하여 상호 밀착되며 제2 리벳(154)에 의하여 모두 전기적으로 연결된다. 본 발명의 일실시예에서, 제2 리벳(154)은 적어도 하나, 바람직하게 적어도 2 개가 음극판(120)의 음극 탭(125)들에 결합 될 수 있다.Therefore, the stacked plurality of negative electrode plates 120 are in close contact with each other by the second rivet 154 and are electrically connected to each other by the second rivet 154. In one embodiment of the invention, at least one, preferably at least two, second rivets 154 may be coupled to the negative electrode tabs 125 of the negative electrode plate 120.

본 발명의 일실시예에서, 양극판(110)의 양극 탭(115)를 연결하는 제1 리벳(152)의 길이는 상호 마주하게 배치된 모든 양극 탭(115)들의 전체 두께보다 길게 형성된다.In one embodiment of the present invention, the length of the first rivet 152 connecting the positive electrode tab 115 of the positive electrode plate 110 is formed longer than the total thickness of all the positive electrode tabs 115 facing each other.

또한, 음극판(120)의 음극 탭(125)들을 연결하는 제2 리벳(154)의 길이는 상호 마주하게 배치된 모든 음극 탭(125)들의 전체 두께보다 길게 형성된다.In addition, the length of the second rivets 154 connecting the negative electrode tabs 125 of the negative electrode plate 120 is longer than the total thickness of all the negative electrode tabs 125 facing each other.

이는 제1 및 제2 리벳(152,154)들의 길이가 양극 탭(115)들 및 음극 탭(125)들의 전체 두께보다 짧을 경우, 양극 탭(115) 및 음극 탭(125)들 중 일부가 제1 및 제2 리벳(152,154)들과 전기적/기계적으로 연결되지 않기 때문이다.This is because when the length of the first and second rivets 152, 154 is shorter than the overall thickness of the positive electrode tabs 115 and the negative electrode tabs 125, some of the positive electrode tabs 115 and the negative electrode tabs 125 may be formed of the first and second rivets 152, 154. This is because they are not electrically / mechanically connected to the second rivets 152 and 154.

이와 같이 제1 및 제2 리벳(152,154)들의 길이가 양극 탭(115) 및 음극 탭(125)들의 전체 두께보다 길게 형성될 경우, 제1 및 제2 리벳(152,154)들의 단부는 양극 탭(115) 및 음극 탭(125)들의 바깥쪽으로 돌출되고, 돌출된 제1 및 제2 리벳(152,154)들의 단부는 얇은 두께를 갖는 외장재(170)를 관통하거나 외장재(170)를 손상시킬 수 있다.As such, when the lengths of the first and second rivets 152 and 154 are longer than the total thicknesses of the positive electrode tab 115 and the negative electrode tabs 125, the ends of the first and second rivets 152 and 154 may be formed in the positive electrode tab 115. ) And the end portions of the protruding first and second rivets 152 and 154 that protrude outwardly of the negative electrode tabs 125 may penetrate the exterior member 170 having a thin thickness or damage the exterior member 170.

도 8 및 도 9를 참조하면, 절연 도막(160)은 양극 탭(115)을 관통한 제1 리벳(152)의 단부 및 음극 탭(125)을 관통한 제2 리벳(154)의 단부를 감싸 제1 리벳(152)의 상기 단부 및/또는 제2 리벳(154)의 상기 단부에 의하여 외장재(170)가 손상되는 것을 방지한다.8 and 9, the insulating coating 160 wraps around the end of the first rivet 152 penetrating the positive electrode tab 115 and the end of the second rivet 154 penetrating the negative electrode tab 125. The end 170 of the first rivet 152 and / or the end of the second rivet 154 may be prevented from being damaged.

절연 도막(160)을 이루는 합성수지는 폴리에틸렌(Polyethylene), 폴리프로필렌(Polypropylene) 및 폴리카보네이트(polycarbonate) 중 어느 하나를 포함할 수 있다. 이와 다르게, 절연 도막(160)은 휘발성 용제에 의하여 녹은 후 휘발성 용제의 휘발에 의하여 경화되는 다양한 합성 수지를 사용하여도 무방하다.Synthetic resin constituting the insulating coating 160 may include any one of polyethylene, polypropylene, and polycarbonate. Alternatively, the insulating coating 160 may use various synthetic resins that are melted by the volatile solvent and then cured by volatilization of the volatile solvent.

본 발명의 일실시예에서, 절연 도막(160)은 양극 탭(115)을 관통하여 돌출된 제1 리벳(152)의 단부 및 음극 탭(125)을 관통하여 돌출된 제2 리벳(152)의 단부를 선택적으로 덮을 수 있다.In one embodiment of the invention, the insulating coating 160 is the end of the first rivet 152 protruding through the positive electrode tab 115 and the second rivet 152 protruding through the negative electrode tab 125. The ends may optionally be covered.

절연 도막(160)은 제1 리벳(152)이 관통한 가장 바깥쪽 양극 탭(115) 및 제2 리벳(154)이 관통한 가장 바깥쪽 음극 탭(125)을 덮는 후박한 막 형태로 형성될 수 있다. 이와 다르게, 절연 도막(160)은 제1 리벳(152)이 관통한 가장 바깥쪽 양극 탭(115) 및 제2 리벳(152)이 관통한 가장 바깥쪽 음극 탭(125)을 섬 형상으로 덮어도 무방하다.The insulating coating 160 may be formed in the form of a thin film covering the outermost anode tab 115 penetrated by the first rivet 152 and the outermost cathode tab 125 penetrated by the second rivet 154. Can be. Alternatively, the insulating coating 160 may cover the outermost positive electrode tab 115 penetrated by the first rivet 152 and the outermost negative electrode tab 125 penetrated by the second rivet 152 in an island shape. It's okay.

양극 탭(115)의 측면 및 양극 탭(115)을 관통한 제1 리벳(152)을 덮는 절연 절연 도막(160) 중 양극 탭(115)의 제1 리벳(152)의 단부를 덮는 부분 및 음극 탭(125)의 제2 리벳(154)의 단부를 덮는 부분은 후박한 제1 두께(T1)로 형성될 수 있다. 이때, 절연 도막(160)의 제1 두께(T1)는 양극 탭(115)으로부터 돌출된 제1 리벳(152)의 돌출 길이 및 음극 탭(125)으로부터 돌출된 제2 리벳(154)의 돌출 길이보다는 두꺼운 두께로 형성된다. A portion of the insulating insulating coating 160 covering the side of the positive electrode tab 115 and the first rivet 152 penetrating the positive electrode tab 115, and the portion of the negative electrode tab 115 covering the end of the first rivet 152 of the positive electrode tab 115 and the negative electrode thereof. A portion of the tab 125 covering the end portion of the second rivet 154 may be formed to have a thin first thickness T1. In this case, the first thickness T1 of the insulating coating layer 160 may be a protruding length of the first rivet 152 protruding from the positive electrode tab 115 and a protruding length of the second rivet 154 protruding from the negative electrode tab 125. Rather than being formed thicker.

또한, 절연 도막(160) 중 음극 탭(115)의 측면을 덮는 부분 및 음극 탭(125)의 측면을 덮는 부분은 제1 두께(T1) 보다 얇은 제2 두께로 형성될 수 있다.In addition, the portion covering the side surface of the negative electrode tab 115 and the portion covering the side surface of the negative electrode tab 125 of the insulating coating layer 160 may be formed to have a second thickness thinner than the first thickness T1.

본 발명의 일실시예에서, 절연 도막(160)은 휘발성 용제에 의하여 녹은 상태에서 양극 탭(115)의 측면 및 제1 리벳(152)의 단부 및 음극 탭(125)의 측면 및 제2 리벳(154)의 단부를 덮음으로써 제1 및 제2 리벳(152,154)들의 단부에 의하여 외장재(170)의 손상을 방지할 수 있다.In one embodiment of the present invention, the insulating coating 160 is the side of the positive electrode tab 115 and the end of the first rivet 152 and the side of the negative electrode tab 125 and the second rivet (melted by volatile solvent) By covering the ends of the 154, damage to the exterior material 170 may be prevented by the ends of the first and second rivets 152 and 154.

실시예 2Example 2

도 10 본 발명의 제2 실시예에 따른 배터리 셀의 양극판, 음극판, 리벳 및 수축 커버를 도시한 분해 사시도이다. 도 11은 도 10의 양극 탭 및 수축 커버를 횡 방향으로 절단한 단면도이다. 도 12는 본 발명의 다른 실시예에 따른 양극 탭 및 수축 커버를 횡 방향으로 절단한 단면도이다. 본 발명의 제2 실시예에 따른 배터리 셀은 수축 커버를 제외하면 앞서 제1 실시예에 따른 배터리 셀과 실질적으로 동일하다.10 is an exploded perspective view illustrating a positive electrode plate, a negative electrode plate, a rivet, and a shrink cover of a battery cell according to a second embodiment of the present invention. FIG. 11 is a cross-sectional view of the positive electrode tab and the shrinkage cover of FIG. 12 is a cross-sectional view of the positive electrode tab and the shrinkage cover according to another embodiment of the present invention. The battery cell according to the second embodiment of the present invention is substantially the same as the battery cell according to the first embodiment except for the shrink cover.

배터리 팩(battery pack)을 이루는 배터리 셀(100)은 양극판(110), 음극판(120), 분리막(130), 외부 접속 단자(140), 리벳(150), 수축 커버(160) 및 외장재(170)를 포함한다.The battery cell 100 constituting the battery pack includes a positive electrode plate 110, a negative electrode plate 120, a separator 130, an external connection terminal 140, a rivet 150, a shrink cover 160, and an exterior material 170. ).

수축 커버(160)는 양극 탭(115)의 측면들 및 양극 탭(115)으로부터 돌출된 제1 리벳(152) 및 음극 탭(125)의 측면들 및 음극 탭(125)으로부터 돌출된 제2 리벳(154)을 감싸 제1 리벳(152) 및/또는 제2 리벳(154)에 의하여 외장재(170)가 손상되는 것을 방지한다.Shrink cover 160 includes first rivet 152 protruding from positive side tab and positive side tab 115 and second rivet protruding side from negative side tab and negative side tab 125. Wrapping 154 prevents the exterior material 170 from being damaged by the first rivet 152 and / or the second rivet 154.

또한, 수축 커버(160)는 외장재(170)의 손상을 방지할 뿐만 아니라 수작업이 아닌 자동화 공정에 의하여 조립이 가능하도록 한다.In addition, the shrinkage cover 160 not only prevents damage to the exterior material 170, but also enables assembly by an automated process rather than manual work.

수축 커버(160)는, 양단이 개구 되어 양극 탭(115) 및 음극 탭(125)에 삽입되는 튜브 형상으로 형성되며, 수축 커버(160)는 양극 탭(115) 및 음극 탭(125)에 삽입된 후 제공된 열에 의하여 수축되는 열 수축 튜브(heat shrink tube)를 포함할 수 있다.The shrink cover 160 is formed in a tube shape in which both ends are opened and inserted into the positive electrode tab 115 and the negative electrode tab 125, and the shrink cover 160 is inserted into the positive electrode tab 115 and the negative electrode tab 125. And a heat shrink tube that is then contracted by the provided heat.

수축 커버(160)는, 예를 들어, 균일한 두께(T1)로 형성될 수 있고, 수축 커버(160)는 제1 리벳(152)이 결합 된 양극 탭(115) 및 제2 리벳(154)이 결합 된 음극 탭(125)에 각각 삽입된 상태로 수축 커버(160)에 열이 가해져 수축 커버(160)는 양극 탭(115) 및 제1 리벳(152), 음극 탭(125) 및 제2 리벳(154)을 감싼다.For example, the shrink cover 160 may be formed to have a uniform thickness T1, and the shrink cover 160 may include the positive electrode tab 115 and the second rivet 154 to which the first rivet 152 is coupled. Heat is applied to the shrink cover 160 in a state in which the negative electrode tab 125 is coupled to each other so that the shrink cover 160 includes the positive electrode tab 115, the first rivet 152, the negative electrode tab 125, and the second. Wrap rivet 154.

한편, 도 12를 참조하면, 수축 커버(165)는 서로 다른 두께로 형성된다. 구체적으로, 수축 커버(165) 중 양극 탭(115)을 관통한 제1 리벳(152)의 단부 및 음극 탭(125)을 관통한 제2 리벳(154)의 단부와 대응하는 수축 커버(165)는 제1 두께(T2)로 형성된다. 한편, 수축 커버(165) 중 양극 탭(115)의 측면 및 음극 탭(125)의 측면을 감싸는 부분은 제1 두께(T2)보다 얇은 제2 두께(T3)로 형성될 수 있다.Meanwhile, referring to FIG. 12, the shrink cover 165 is formed to have a different thickness. Specifically, the shrink cover 165 corresponding to the end of the first rivet 152 penetrating the positive electrode tab 115 and the end of the second rivet 154 penetrating the negative electrode tab 125 of the shrink cover 165. Is formed to a first thickness T2. Meanwhile, a portion of the contraction cover 165 surrounding the side surface of the positive electrode tab 115 and the side surface of the negative electrode tab 125 may be formed to have a second thickness T3 thinner than the first thickness T2.

본 발명의 일실시예에서, 양극 탭(115)을 관통한 제1 리벳(152)의 단부 및 음극 탭(125)을 관통한 제2 리벳(154)의 단부와 대응하는 수축 커버(165)를 보다 후박하게 형성함으로써 제1 및 제2 리벳(152,154)들의 단부와 대응하는 수축 커버(165)의 굴곡을 보다 감소시켜 외장재(170)의 손상을 크게 억제 또는 방지할 수 있다.In one embodiment of the invention, the contraction cover 165 corresponding to the end of the first rivet 152 penetrating the positive electrode tab 115 and the end of the second rivet 154 penetrating the negative electrode tab 125 is provided. By forming a thicker thickness, the bending of the contraction cover 165 corresponding to the ends of the first and second rivets 152 and 154 may be further reduced, thereby greatly suppressing or preventing damage to the exterior material 170.

이상에서 상세하게 설명한 바에 의하면, 양극판 및 음극판을 결합하는 리벳을 절연 도막을 이용하여 감싸 리벳에 의한 외장재의 손상을 방지할 수 있다. 리벳을 감싸 외장재의 손상을 방지하는 절연 도막은 휘발성 용제에 의하여 녹은 합성수지를 이용하기 때문에 수지 도포 자동화 설비에 의하여 자동화를 쉽게 할 수 있기 때문에 생산성을 보다 향상시킬 수 있는 효과를 갖는다.As described above in detail, it is possible to prevent the damage to the packaging material by the rivet by wrapping the rivet joining the positive electrode plate and the negative electrode plate using an insulating coating film. Insulation coating film that wraps the rivet to prevent damage to the exterior material is because the synthetic resin melted by the volatile solvent is used to facilitate the automation by the resin coating automation equipment has the effect of improving the productivity more.

또한, 양극판 및 음극판을 결합하는 리벳을 열에 의하여 수축되는 열 수축 커버를 이용하여 감싸 리벳에 의한 외장재의 손상을 방지할 수 있다. 리벳을 감싸 외장재의 손상을 방지하는 수축 커버는 자동화 공정에 의하여 양극 탭 또는 음극 탭과 상호 결합할 수 있기 때문에 생산성을 보다 향상시킬 수 있는 효과를 갖는다.In addition, it is possible to prevent damage to the packaging material by the rivet by using a heat shrink cover that is shrunk by heat to the rivet bonding the positive plate and the negative plate. The shrinkage cover that covers the rivets and prevents damage to the exterior material has an effect of further improving productivity since the shrinkage cover can be mutually combined with the positive electrode tab or the negative electrode tab by an automated process.

본 발명은 전기 자동차용 배터리 팩의 배터리 셀 또는 산업용 배터리 팩의 배터리 셀에 이용 가능하다.The present invention can be used for a battery cell of an electric vehicle battery pack or a battery cell of an industrial battery pack.

Claims (10)

복수매가 적층 되며 양극 탭이 상호 마주하게 배치된 양극판들;A plurality of positive electrode plates in which a plurality of sheets are stacked and positive electrode tabs face each other; 상기 양극판들 사이에 개재되며 음극 탭이 상호 마주하게 배치된 음극판들;Negative plates interposed between the positive plates and disposed with the negative electrode tabs facing each other; 상기 양극판 및 음극판들 사이에 개재된 분리막;A separator interposed between the positive electrode plate and the negative electrode plate; 상기 양극 탭들을 관통하는 제1 리벳, 상기 음극 탭들을 관통하는 제2 리벳을 포함하는 리벳; 및A rivet comprising a first rivet penetrating the positive electrode tabs and a second rivet penetrating the negative electrode tabs; And 상기 양극 탭 및 상기 음극 탭을 관통한 상기 제1 및 제2 리벳들의 단부를 덮는 절연 도막을 포함하는 배터리 셀.And an insulating coating covering the ends of the first and second rivets passing through the positive electrode tab and the negative electrode tab. 제1항에 있어서,The method of claim 1, 상기 절연 도막은 상기 양극 탭 및 상기 음극 탭의 측면을 덮는 배터리 셀.A battery cell covering side surfaces of the positive electrode tab and the negative electrode tab. 제1항에 있어서,The method of claim 1, 상기 절연 도막 중 상기 제1 및 제2 리벳들을 덮는 부분은 제1 두께로 형성되고, 상기 양극 탭 및 상기 음극 탭의 측면을 덮는 부분은 상기 제1 두께보다 얇은 제2 두께로 형성된 배터리 셀.A portion of the insulating coating layer covering the first and second rivets is formed to a first thickness, and a portion covering the side surfaces of the positive electrode tab and the negative electrode tab has a second thickness thinner than the first thickness. 제1항에 있어서,The method of claim 1, 상기 절연 도막은 폴리에틸렌(Polyethylene), 폴리프로필렌(Polypropylene) 및 폴리카보네이트(polycarbonate)로 이루어진 군으로부터 선택된 어느 하나의 합성 수지를 포함하는 배터리 셀.The insulating coating film is a battery cell comprising any one synthetic resin selected from the group consisting of polyethylene (polyethylene), polypropylene (polypropylene) and polycarbonate (polycarbonate). 제1항에 있어서,The method of claim 1, 상기 양극 탭에 결합 된 제1 외부 접속 단자 및 상기 음극 탭에 결합 된 제2 외부 접속 단자를 포함하는 외부 접속 단자; 및An external connection terminal including a first external connection terminal coupled to the positive electrode tab and a second external connection terminal coupled to the negative electrode tab; And 상기 양극판들, 상기 음극판들 및 상기 절연 도막을 감싸는 외장재를 더 포함하는 배터리 셀.The battery cell further comprises a packaging material surrounding the positive electrode plates, the negative electrode plates and the insulating coating. 복수매가 적층 되며 양극 탭이 상호 마주하게 배치된 양극판들;A plurality of positive electrode plates in which a plurality of sheets are stacked and positive electrode tabs face each other; 상기 양극판들 사이에 개재되며 음극 탭이 상호 마주하게 배치된 음극판들;Negative plates interposed between the positive plates and disposed with the negative electrode tabs facing each other; 상기 양극판 및 음극판들 사이에 개재된 분리막;A separator interposed between the positive electrode plate and the negative electrode plate; 상기 양극 탭들을 관통하는 제1 리벳, 상기 음극 탭들을 관통하는 제2 리벳을 포함하는 리벳; 및A rivet comprising a first rivet penetrating the positive electrode tabs and a second rivet penetrating the negative electrode tabs; And 상기 양극 탭들의 측면과 상기 제1 리벳 및 상기 음극 탭들의 측면 및 상기 제2 리벳을 각각 감싸는 수축 커버를 포함하는 배터리 셀.And a shrink cover covering side surfaces of the positive electrode tabs, side surfaces of the first and negative electrode tabs, and the second rivet, respectively. 제6항에 있어서,The method of claim 6, 상기 수축 커버는 열에 의하여 수축되는 열 수축 튜브를 포함하는 배터리 셀.The shrink cover includes a heat shrink tube that is contracted by heat. 제6항에 있어서,The method of claim 6, 상기 수축 커버 중 상기 제1 및 제2 리벳들의 상기 각 단부들과 대응하는 부분은 제1 두께로 형성되며, 상기 양극 탭 및 상기 음극 탭들의 각 측면과 대응하는 부분은 상기 제1 두께보다 얇은 제2 두께로 형성된 배터리 셀.Portions of the shrinkage cover corresponding to the respective ends of the first and second rivets are formed to have a first thickness, and portions corresponding to each side of the positive electrode tab and the negative electrode tab are thinner than the first thickness. Battery cells formed in two thicknesses. 제6항에 있어서,The method of claim 6, 상기 양극 탭에 결합 된 제1 외부 접속 단자 및 상기 음극 탭에 결합 된 제2 외부 접속 단자를 포함하는 외부 접속 단자를 더 포함하는 배터리 셀.The battery cell further comprises an external connection terminal including a first external connection terminal coupled to the positive electrode tab and a second external connection terminal coupled to the negative electrode tab. 제6항에 있어서,The method of claim 6, 상기 양극판들, 상기 음극판들 및 상기 수축 커버를 감싸는 외장재를 더 포함하는 배터리 셀.The battery cell further comprises an exterior material surrounding the positive electrode plates, the negative electrode plates and the shrinkage cover.
PCT/KR2012/002262 2012-03-22 2012-03-28 Battery cell Ceased WO2013141431A1 (en)

Applications Claiming Priority (4)

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KR10-2012-0029470 2012-03-22
KR1020120029470A KR101327767B1 (en) 2012-03-22 2012-03-22 Battery cell
KR1020120029478A KR101359382B1 (en) 2012-03-22 2012-03-22 Battery cell
KR10-2012-0029478 2012-03-22

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