WO2013151233A1 - Battery cell - Google Patents

Battery cell Download PDF

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Publication number
WO2013151233A1
WO2013151233A1 PCT/KR2013/001185 KR2013001185W WO2013151233A1 WO 2013151233 A1 WO2013151233 A1 WO 2013151233A1 KR 2013001185 W KR2013001185 W KR 2013001185W WO 2013151233 A1 WO2013151233 A1 WO 2013151233A1
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WO
WIPO (PCT)
Prior art keywords
electrode
separator
battery cell
separation film
electrode assembly
Prior art date
Application number
PCT/KR2013/001185
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French (fr)
Korean (ko)
Inventor
공명철
Original Assignee
에스케이이노베이션 주식회사
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Publication of WO2013151233A1 publication Critical patent/WO2013151233A1/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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0459—Cells or batteries with folded separator between plate-like electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
    • 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
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/463—Separators, membranes or diaphragms characterised by their shape
    • H01M50/466—U-shaped, bag-shaped or folded
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/24—Alkaline accumulators
    • H01M10/30—Nickel accumulators
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a battery cell, and relates to a battery cell having an improved shape of an electrode assembly constituted in the battery cell.
  • secondary batteries are rechargeable and have a large capacity, such as nickel cadmium, nickel hydrogen, and lithium ion batteries.
  • the lithium ion battery has attracted attention as a next generation power source due to its excellent characteristics such as long life and high capacity.
  • lithium secondary batteries are used as power sources for portable electronic devices with operating voltages of 3.6 V or higher, or in high-power hybrid vehicles by connecting several in series. Compared with the three times higher operating voltage and excellent energy density per unit weight, the use is increasing rapidly.
  • the lithium secondary battery may be manufactured in various forms, and typical shapes include cylindrical and prismatic types that are mainly used in lithium ion batteries.
  • Lithium polymer batteries which are in the spotlight in recent years, have been manufactured in a flexible pouched type, and their shapes are relatively free.
  • the lithium polymer battery is excellent in safety and light in weight, which is advantageous for slimmer and lighter portable electronic devices.
  • the electrode assembly is composed of a separator which separates the first electrode portion, the second electrode portion, and the first electrode portion and the second electrode portion, respectively.
  • the electrode assembly may be manufactured in the form of a winding or folded in a zigzag form.
  • the electrode assembly manufactured in the folding form has a problem in that a plurality of empty spaces are generated between the separator and the first electrode part or between the separator and the second electrode part.
  • the present invention has been made to solve the above problems, to provide a battery cell comprising an electrode assembly that can reduce the empty space between the separator and the first electrode portion or the separator and the second electrode portion.
  • the battery cell of the present invention comprises: an electrode assembly including a first electrode part, a second electrode part, and a separator separating the first electrode part and the second electrode part; First and second electrode tabs connected to the first and second electrode portions, respectively; And a case for exposing the first electrode tab and the second electrode tab to the outside and accommodating the first electrode part, the second electrode part, and the separator therein, wherein the separator includes the first electrode part and the second electrode.
  • the contact portion is the surface of the separator is bonded to each other.
  • the contact portion is bonded to the surface of the separator by heat fusion.
  • the first electrode portion is an anode
  • the second electrode portion is a cathode
  • the separator is formed in a zigzag shape to separate the alternately stacked first and second electrode parts, respectively.
  • the electrode assembly according to the second exemplary embodiment of the present invention is a full cell in which the first electrode part and the second electrode part are sequentially stacked with an anode, a separation film, and a cathode, or a cathode, a separation film, and an anode are sequentially stacked.
  • the separator is formed in a zigzag shape to separate the alternately stacked first and second electrode parts, respectively.
  • the first electrode portion and the second electrode portion are sequentially stacked anode, separation film, cathode, separation film, anode or cathode, separation film, anode, separation A bicell in which a film and a cathode are laminated.
  • the separator is formed in a zigzag shape to separate the alternately stacked first and second electrode parts, respectively.
  • the battery cell of the present invention has an advantage of reducing the empty space between the separator and the first and second electrode parts, thereby effectively using the space.
  • FIG. 1 is a cross-sectional view of an electrode assembly according to a first embodiment of the present invention
  • FIG. 2 is a cross-sectional view of an electrode assembly including a multilayer structure in which a first electrode part and a second electrode part are alternately stacked according to Embodiment 1 of the present invention.
  • FIG. 3 is a cross-sectional view of an electrode assembly according to Embodiment 2 of the present invention.
  • FIG. 4 is a cross-sectional view of an electrode assembly according to Embodiment 3 of the present invention.
  • 5 to 6 are various embodiments of a battery cell including an electrode assembly according to an embodiment of the present invention
  • the battery cell of the present invention includes an electrode assembly, a first electrode tab, a second electrode tab, and a case.
  • the electrode assembly is a configuration provided inside the case, the electrode assembly of the present invention may be formed in various forms, it will be described in detail.
  • FIG. 1 is a cross-sectional view of an electrode assembly according to Embodiment 1 of the present invention.
  • the electrode assembly 100a includes a first electrode part 110a, a second electrode part 120a, and a separator 130a.
  • the first electrode part 110a is a positive electrode 101, and includes a positive electrode 101 active material layer coated on both surfaces of a positive electrode 101 current collector made of a thin metal plate having excellent conductivity and an aluminum (Al) foil.
  • a chalcogenide compound is used as the active material.
  • complex metal oxides such as LiCoO 2 , LiMn 2 O 4 , LiNiO 2 , LiNi1-xCoxO 2 (0 ⁇ x ⁇ 1), and LiMnO 2 are used.
  • the material is not limited.
  • the second electrode part 120a is a cathode 102, and is a cathode 101 active material coated on both surfaces of an anode 102 current collector made of a conductive metal sheet, for example, copper (Cu) or nickel (Ni) foil. It contains a layer.
  • a carbon (C) -based material Si, Sn, tin oxide, composite tin alloys, transition metal oxide, lithium metal nitride, or lithium metal oxide is used. It does not limit the substance.
  • the separator 130a is configured to separate the first electrode part 110a and the second electrode part 120a, and is formed from a group consisting of polyethylene, polypropylene, and a copolymer of polyethylene and polypropylene. It is made of any one selected, but the material is not limited in this embodiment.
  • the separator 130a may be formed to include the first bending part 131a, the second bending part 132a, and the contact part 133a.
  • the first bending part 131a is a part formed by bending a predetermined region of the separator 130a at one end of the first electrode part 110a while covering at least a portion of the first electrode part 110a.
  • the second bending part 132a is a part formed by bending a predetermined region of the separator 130a at one end of the second electrode part 120a while covering at least a portion of the second electrode part 120a.
  • the contact portion 133a is formed to be in contact with each other while the predetermined regions of the separation membrane 130a corresponding to the first bending portion 131a and the second bending portion 132a are folded.
  • the electrode assembly 100a includes a contact portion 133a, and thus, an empty space between the separator 130a and the first electrode portion 110a or the separator 130a and the second electrode portion 120a. There is an advantage to reduce.
  • the contact portion 133a may be bonded by applying a sealing member.
  • contact portion 133a may be bonded by thermal fusion.
  • the electrode assembly 100a includes a contact portion 133a, so that the first bending portion 131a and the second bending portion 132a are formed of the first electrode portion 110a and the second electrode portion ( In close contact with the 120a side, there is an advantage in that the empty space between the separator 130a and the first and second electrode parts 110a and 120a can be further reduced.
  • FIG. 2 is a cross-sectional view of an electrode assembly including a multilayer structure in which a first electrode part and a second electrode part are alternately stacked according to Embodiment 1 of the present invention.
  • the electrode assembly 100a has a multilayer structure in which a plurality of first electrode portions 110a and a plurality of second electrode portions 120a are alternately stacked. Can be.
  • the separator 130a is formed in a zigzag form including the first bending part 131a, the second bending part 132a, and the contact part 133a to form the first electrode part 110a and the second electrode part 120a.
  • the plurality of first electrode portions 110a and the plurality of second electrode portions 120 that are alternately stacked and enclosed at least a portion of the plurality of second electrodes 120 are separated from each other.
  • FIG. 3 is a cross-sectional view of an electrode assembly 100 according to Embodiment 2 of the present invention.
  • the electrode assembly 100b includes a first electrode part 110b, a second electrode part 120b, and a separator 130b.
  • the first electrode part 110b and the second electrode part 120b are sequentially stacked with the anode 101, the separation film 103, and the cathode 102, or sequentially with the cathode 102, the separation film 103, and the anode.
  • Each of the 101 cells is formed of a stacked full cell.
  • the electrode assembly 100b includes a full cell in which the first electrode part 110b is sequentially stacked with the anode 101, the separation film 103, and the cathode 102.
  • the second electrode part 120b may be formed in a structure in which the cathode 102, the separation film 103, and the cathode 102 are sequentially stacked.
  • the electrode assembly 100b according to the second embodiment of the present invention is formed in a structure of a full cell in which the first electrode part 110b is sequentially stacked with a cathode 102, a separation film 103, and an anode 101.
  • the second electrode part 120b may be formed to have a structure in which the anode 101, the separation film 103, and the cathode 102 are sequentially stacked.
  • first electrode part 110b and the second electrode part 120b are composed of a plurality of alternating layers to increase the overall power capacity of the electrode assembly 100b.
  • the first electrode part 110b and the second electrode part 120b are formed of a full cell in which the anode 101, the separation film 103, and the cathode 102 are sequentially stacked, and the plurality of first electrode parts ( 110b) and the plurality of second electrode portions 120b are alternately stacked.
  • the separation film 103 is formed of the same material as the separator 130b.
  • the separator 130b is formed in a zigzag form including the first bending part 131b, the second bending part 132b, and the contact part 133b to form at least one of the first electrode part 110b and the second electrode part 120b.
  • the first electrode part 110b and the second electrode part 120b, which are alternately stacked and partially stacked, are separated from each other.
  • FIG. 4 is a cross-sectional view of an electrode assembly according to a third exemplary embodiment of the present invention.
  • the electrode assembly 100c includes a first electrode part 110c, a second electrode part 120c, and a separator 130c.
  • the first electrode part 110c and the second electrode part 120c are sequentially stacked with the anode 101, the separator film 103, the cathode 102, the separator film 103, and the anode 101 or the cathode sequentially.
  • the 102, the separation film 103, the positive electrode 101, the separation film 103, and the negative electrode 102 are each formed of a bi-cell (bi-cell) is laminated.
  • the first electrode part 110 may sequentially have a positive electrode 101, a separation film 103, a negative electrode 102, a separation film 103, and an anode 101.
  • first electrode part 110c and the second electrode part 110c are configured in plural and alternately stacked in order to increase the overall power capacity of the electrode assembly 100c.
  • the first electrode part 110c and the second electrode part 120c are sequentially stacked with the positive electrode 101, the separation film 103, the negative electrode 102, the separation film 103, and the positive electrode 101.
  • a structure in which a cell is formed and a plurality of first electrode portions 110c and a plurality of second electrode portions 120c are alternately stacked is illustrated.
  • the separator 130c is formed in a zigzag form including the first bending part 131c, the second bending part 132c, and the contact part 133c to form at least one of the first electrode part 110c and the second electrode part 120c.
  • the first electrode part 110c and the second electrode part 120c, which are alternately stacked and partially stacked, are separated from each other.
  • the electrode assembly according to Embodiments 2 and 3 of the present invention is formed in a stacked form of a full cell or bicell, while maximizing the content of the electrode active material, while the empty space between the separator and the first electrode part and the second electrode part. There is an advantage to reduce.
  • 5 to 6 are various embodiments of a battery cell including an electrode assembly according to an embodiment of the present invention.
  • one embodiment of a battery cell 1000a including an electrode assembly may include an electrode assembly, a first electrode junction 140a, a second electrode junction 150a, and a second electrode assembly 150a.
  • the first electrode tab 145a, the second electrode tab 155a, and the case 200a are formed.
  • Electrode assembly is preferably formed of an electrode assembly (100a) according to the first embodiment of the present invention.
  • the present invention is not limited to this, and may be applied to an electrode assembly of another embodiment including the technical idea of the present invention.
  • the first electrode junction 140a extends from one side of each of the first electrode portions 110a of the electrode assembly 100a, and each end of the first electrode junction 140a is joined.
  • the second electrode bonding part 150a is formed to extend from one side to the second electrode part 120 of the electrode assembly 100, and one end of each of the second electrode bonding part 150a is joined.
  • the first electrode tab 145a and the second electrode tab 155a are connected to the first electrode tab 140a and the second electrode tab 150a as a configuration for power connection.
  • an electrode assembly 100a, a first electrode junction 140a, and a second electrode junction 150a are accommodated therein, and the first electrode tab 145a and the second electrode tab 155a are disposed to the outside. Sealed so as to be exposed, the sealing member (A) is formed by applying a sealing member on the circumferential surface bonded to each other.
  • case 200 is made of a conductive metal material such as aluminum, aluminum alloy or nickel plated steel.
  • another embodiment of a battery cell 1000b including an electrode assembly includes an electrode assembly, a first electrode junction 140b, a second electrode junction 150b, The first electrode tab 145b, the second electrode tab 155b, and the case 200b are formed.
  • the electrode assembly is preferably formed of the electrode assembly 100a according to the first embodiment of the present invention, but the present invention is not limited thereto and may be applied to the electrode assembly of another embodiment including the technical idea of the present invention. Do.
  • the first electrode bonding part 140b is formed to extend in one direction from the first electrode part 110b of the electrode assembly 100b, and each end of the first electrode bonding part 140b is joined.
  • the second electrode bonding portion 150b is formed to extend in the other direction from the second electrode portion 120b of the electrode assembly 100b, and one end of the second electrode bonding portion 150b is joined.
  • the first electrode tab 145b and the second electrode tab 155b are connected to the first electrode junction 140b and the second electrode junction 150b as a configuration for connecting power.
  • the case 200b includes an electrode assembly 100b, a first electrode junction 140b, and a second electrode junction 150b disposed therein, and the first electrode tab 145b and the second electrode tab 155b are disposed outward. Sealed so as to be exposed, the sealing member (A) is formed by applying a sealing member on the circumferential surface bonded to each other.
  • the battery cell of the present invention constitutes a battery cell including an electrode assembly capable of reducing the empty space between the separator and the first electrode part or the separator and the second electrode part, thereby separating the separator and the first electrode part and the second electrode part.
  • an electrode assembly capable of reducing the empty space between the separator and the first electrode part or the separator and the second electrode part, thereby separating the separator and the first electrode part and the second electrode part.
  • the present invention can be applied to a rectangular battery, and is not limited to the above-described embodiments.
  • first electrode portion 120a, b, c second electrode portion

Abstract

The invention relates to a battery cell that comprises: an electrode assembly including a first electrode portion, a second electrode portion, and a separation membrane that separates the first electrode portion from the second electrode portion; a first electrode tab and a second electrode tab that are connected to the first electrode portion and the second electrode portion, respectively; and a case in which the first electrode tab and the second electrode tab are exposed to the outside, wherein the case accommodates the first electrode portion, the second electrode portion, and the separation membrane therein. The separation membrane includes a first bending portion surrounding at least part of the first electrode portion and the second electrode portion, wherein the first bending portion is bent at one end of the first electrode portion, and a second bending portion is bent at one end of the second electrode portion. The first bending portion and the second bending portion include contact portions which come into contact with each other when the separation membrane is folded.

Description

배터리셀Battery cell
본 발명은 배터리셀에 관한 것으로, 배터리셀에 구성되는 전극조립체의 형태가 개선된 배터리셀에 관한 것이다.The present invention relates to a battery cell, and relates to a battery cell having an improved shape of an electrode assembly constituted in the battery cell.
통상적으로 2차 전지는 재충전이 가능하고 대용량화가 가능한 것으로 대표적인 것으로 니켈카드뮴, 니켈수소 및 리튬이온전지 등이 있다. 이중에서 상기 리튬이온전지는 장 수명, 고용량 등 우수한 특성으로 인하여 차세대 동력원으로 주목받고 있다. 이 중에서, 리튬 2차 전지는 작동 전압이 3.6V 이상으로 휴대용 전자 기기의 전원으로 사용되거나, 또는 수개를 직렬 연결하여 고출력의 하이브리드 자동차에 사용되는데, 니켈-카드뮴 전지나, 니켈-메탈 하이드라이드 전지에 비하여 작동 전압이 3배가 높고, 단위 중량당 에너지 밀도의 특성도 우수하여 급속도로 사용이 증가되고 있는 추세이다.In general, secondary batteries are rechargeable and have a large capacity, such as nickel cadmium, nickel hydrogen, and lithium ion batteries. Among them, the lithium ion battery has attracted attention as a next generation power source due to its excellent characteristics such as long life and high capacity. Among these, lithium secondary batteries are used as power sources for portable electronic devices with operating voltages of 3.6 V or higher, or in high-power hybrid vehicles by connecting several in series. Compared with the three times higher operating voltage and excellent energy density per unit weight, the use is increasing rapidly.
상기 리튬 2차 전지는 다양한 형태로 제조가능한데, 대표적인 형상으로는 리튬 이온 전지에 주로 사용되는 원통형(cylinder type) 및 각형(prismatic type)을 들 수 있다. 최근 들어 각광받는 리튬 폴리머 전지는 유연성을 지닌 파우치형(pouched type)으로 제조되어서, 그 형상이 비교적 자유롭다. 또한 리튬 폴리머 전지는 안전성도 우수하고, 무게가 가벼워서 휴대용 전자 기기의 슬림화 및 경량화에 유리하다.The lithium secondary battery may be manufactured in various forms, and typical shapes include cylindrical and prismatic types that are mainly used in lithium ion batteries. Lithium polymer batteries, which are in the spotlight in recent years, have been manufactured in a flexible pouched type, and their shapes are relatively free. In addition, the lithium polymer battery is excellent in safety and light in weight, which is advantageous for slimmer and lighter portable electronic devices.
상기한 바와 같은 파우치형 이차 전지에 있어서, 전극조립체는 제1전극부 및 제2전극부와 제1전극부와 제2전극부를 각각 분리시키는 분리막으로 구성된다.In the pouch type secondary battery as described above, the electrode assembly is composed of a separator which separates the first electrode portion, the second electrode portion, and the first electrode portion and the second electrode portion, respectively.
또한, 전극조립체는 권취형태로 제작되거나 지그재그형태로 접힌 폴딩형태로 제조된다.In addition, the electrode assembly may be manufactured in the form of a winding or folded in a zigzag form.
그런데, 상기 폴딩형태로 제조된 전극조립체는 분리막과 제1전극부 또는 분리막과 제2전극부 사이에 다수개의 빈 공간이 발생하는 문제점이 있었다.However, the electrode assembly manufactured in the folding form has a problem in that a plurality of empty spaces are generated between the separator and the first electrode part or between the separator and the second electrode part.
따라서 상기한 바와 같은 문제점을 해결하기 위한 전극조립체를 포함하는 배터리셀의 개발이 필요한 실정이다.Therefore, there is a need for the development of a battery cell including an electrode assembly for solving the above problems.
(선행기술문헌)(Prior art document)
(특허문헌)(Patent literature)
US 2011-0104550 A1 (2011.05.05)US 2011-0104550 A1 (2011.05.05)
본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로, 분리막과 제1전극부 또는 분리막과 제2전극부 사이의 빈 공간을 줄일 수 있는 전극조립체를포함하는 배터리셀을 제공하려는 것이다.The present invention has been made to solve the above problems, to provide a battery cell comprising an electrode assembly that can reduce the empty space between the separator and the first electrode portion or the separator and the second electrode portion.
본 발명의 배터리셀은 제1전극부, 제2전극부, 및 상기 제1전극부와 상기 제2전극부를 분리하는 분리막을 포함하는 전극조립체; 상기 제1전극부 및 제2전극부에 각각 연결되는 제1전극탭 및 제2전극탭; 상기 제1전극탭 및 제2전극탭이 외부로 노출되며 상기 제1전극부, 제2전극부 및 분리막을 내부에 수납하는 케이스;를 포함하며, 상기 분리막은 상기 제1전극부와 제2전극부의 적어도 일부를 감싸며 상기 제1전극부의 일단에서 굽힘 형성되는 제1벤딩부와 상기 제2전극부의 일단에서 굽힘 형성되는 제2벤딩부를 포함하고, 상기 제1벤딩부 및 상기 제2벤딩부는 상기 분리막이 접혀져서 그 면이 서로 맞닿도록 형성되는 접촉부를 포함한다.The battery cell of the present invention comprises: an electrode assembly including a first electrode part, a second electrode part, and a separator separating the first electrode part and the second electrode part; First and second electrode tabs connected to the first and second electrode portions, respectively; And a case for exposing the first electrode tab and the second electrode tab to the outside and accommodating the first electrode part, the second electrode part, and the separator therein, wherein the separator includes the first electrode part and the second electrode. A first bending part formed at one end of the first electrode part and bent at one end of the first electrode part, and a second bending part formed at one end of the second electrode part, wherein the first bending part and the second bending part are separated from each other. It is folded to include a contact portion is formed so that the surfaces abut each other.
또한, 상기 접촉부는 상기 분리막의 면이 서로 접착된다.In addition, the contact portion is the surface of the separator is bonded to each other.
이 때, 상기 접촉부는 상기 분리막의 면이 열융착에 의해 접착된다.At this time, the contact portion is bonded to the surface of the separator by heat fusion.
한 편, 본 발명의 실시예 1에 따른 상기 전극조립체는 상기 제1전극부가 양극이고, 상기 제2전극부가 음극이다.On the other hand, in the electrode assembly according to the first embodiment of the present invention, the first electrode portion is an anode, and the second electrode portion is a cathode.
이 때, 상기 전극조립체는 복수의 상기 제1전극부와 복수의 상기 제2전극부가 교번 적층되고, 상기 분리막은 지그재그형태로 형성되어 교번 적층된 상기 제1전극부와 제2전극부를 각각 분리시킨다.In this case, in the electrode assembly, a plurality of first electrode parts and a plurality of second electrode parts are alternately stacked, and the separator is formed in a zigzag shape to separate the alternately stacked first and second electrode parts, respectively. .
또한, 본 발명의 실시예 2에 따른 상기 전극조립체는 상기 제1전극부 및 상기 제2전극부가 순차적으로 양극, 분리 필름, 음극이 적층되거나 순차적으로 음극, 분리 필름, 양극이 적층된 풀셀이다.In addition, the electrode assembly according to the second exemplary embodiment of the present invention is a full cell in which the first electrode part and the second electrode part are sequentially stacked with an anode, a separation film, and a cathode, or a cathode, a separation film, and an anode are sequentially stacked.
이 때, 상기 전극조립체는 복수의 상기 제1전극부와 복수의 상기 제2전극부가 교번 적층되고, 상기 분리막은 지그재그형태로 형성되어 교번 적층된 상기 제1전극부와 제2전극부를 각각 분리시킨다.In this case, in the electrode assembly, a plurality of first electrode parts and a plurality of second electrode parts are alternately stacked, and the separator is formed in a zigzag shape to separate the alternately stacked first and second electrode parts, respectively. .
또한, 본 발명의 실시예 3에 따른 상기 전극조립체는 상기 제1전극부 및 제2전극부가 순차적으로 양극, 분리 필름, 음극, 분리 필름, 양극이 적층되거나 순차적으로 음극, 분리 필름, 양극, 분리 필름, 음극이 적층된 바이셀이다.In addition, the electrode assembly according to the third embodiment of the present invention, the first electrode portion and the second electrode portion are sequentially stacked anode, separation film, cathode, separation film, anode or cathode, separation film, anode, separation A bicell in which a film and a cathode are laminated.
이 때, 상기 전극조립체는 복수의 상기 제1전극부와 복수의 상기 제2전극부가 교번 적층되고, 상기 분리막은 지그재그형태로 형성되어 교번 적층된 상기 제1전극부와 제2전극부를 각각 분리시킨다.In this case, in the electrode assembly, a plurality of first electrode parts and a plurality of second electrode parts are alternately stacked, and the separator is formed in a zigzag shape to separate the alternately stacked first and second electrode parts, respectively. .
본 발명의 배터리셀은 분리막과 제1, 2전극부 사이의 빈 공간을 줄일 수 있어서 공간을 효율적으로 사용할 수 있는 장점이 있다.The battery cell of the present invention has an advantage of reducing the empty space between the separator and the first and second electrode parts, thereby effectively using the space.
도 1은 본 발명의 실시예 1에 따른 전극조립체의 단면도1 is a cross-sectional view of an electrode assembly according to a first embodiment of the present invention
도 2는 본 발명의 실시예 1에 따른 제1전극부와 제2전극부가 교번 적층된 다층 구조를 포함하는 전극조립체의 단면도 2 is a cross-sectional view of an electrode assembly including a multilayer structure in which a first electrode part and a second electrode part are alternately stacked according to Embodiment 1 of the present invention.
도 3은 본 발명의 실시예 2에 따른 전극조립체의 단면도3 is a cross-sectional view of an electrode assembly according to Embodiment 2 of the present invention.
도 4는 본 발명의 실시에 3에 따른 전극조립체의 단면도4 is a cross-sectional view of an electrode assembly according to Embodiment 3 of the present invention.
도 5 내지 도 6은 본 발명의 실시예에 따른 전극조립체를 포함하는 배터리셀의 여러 실시예5 to 6 are various embodiments of a battery cell including an electrode assembly according to an embodiment of the present invention
이하, 본 발명의 기술적 사상을 첨부된 도면을 사용하여 더욱 구체적으로 설명한다.Hereinafter, the technical spirit of the present invention will be described in more detail with reference to the accompanying drawings.
첨부된 도면은 본 발명의 기술적 사상을 더욱 구체적으로 설명하기 위하여 도시한 일예에 불과하므로 본 발명의 기술적 사상이 첨부된 도면의 형태에 한정되는 것은 아니다.The accompanying drawings are only examples to illustrate the technical idea of the present invention in more detail, and thus the technical idea of the present invention is not limited to the forms of the accompanying drawings.
본 발명의 배터리셀은 전극조립체, 제1전극탭, 제2전극탭, 케이스를 포함하여 형성된다.The battery cell of the present invention includes an electrode assembly, a first electrode tab, a second electrode tab, and a case.
전극조립체는 케이스의 내부에 구비되는 구성으로서, 본 발명의 전극조립체는 다양한 형태로 형성될 수 있는데, 이에 대해 상세히 설명하기로 한다.The electrode assembly is a configuration provided inside the case, the electrode assembly of the present invention may be formed in various forms, it will be described in detail.
도 1은 본 발명의 실시예 1에 따른 전극조립체의 단면도이다.1 is a cross-sectional view of an electrode assembly according to Embodiment 1 of the present invention.
도 1에 도시된 바와 같이, 본 발명의 실시예 1에 따른 전극조립체(100a)는 제1전극부(110a), 제2전극부(120a), 분리막(130a)을 포함하여 형성된다.As shown in FIG. 1, the electrode assembly 100a according to Embodiment 1 of the present invention includes a first electrode part 110a, a second electrode part 120a, and a separator 130a.
제1전극부(110a)는 양극(101)으로서, 도전성이 우수한 금속 박판, 알루미늄(Al) 호일(foil)로 이루어진 양극(101) 집전체의 양면에 코팅된 양극(101) 활물질층을 포함하고 있다. 활물질로는 칼코게나이드(chalcogenide) 화합물이 사용되고 있으며, 그 예로 LiCoO2, LiMn2O4, LiNiO2, LiNi1-xCoxO2(0<x<1), LiMnO2 등의 복합 금속 산화물들이 사용되고 있으나, 본 실시예에서 그 물질을 한정하는 것은 아니다.The first electrode part 110a is a positive electrode 101, and includes a positive electrode 101 active material layer coated on both surfaces of a positive electrode 101 current collector made of a thin metal plate having excellent conductivity and an aluminum (Al) foil. have. As the active material, a chalcogenide compound is used. For example, complex metal oxides such as LiCoO 2 , LiMn 2 O 4 , LiNiO 2 , LiNi1-xCoxO 2 (0 <x <1), and LiMnO 2 are used. In this embodiment, the material is not limited.
제2전극부(120a)는 음극(102)으로서, 전도성 금속 박판, 예를 들면, 구리(Cu) 또는 니켈(Ni) 호일로 이루어진 음극(102) 집전체의 양면에 코팅된 양극(101) 활물질층을 포함하고 있다. 음극(102) 활물질은 탄소(C) 계열 물질, Si, Sn, 틴 옥사이드, 틴 합금 복합체(composite tin alloys), 전이 금속 산화물, 리튬 금속 나이트라이드 또는 리튬 금속 산화물 등 이 사용되고 있으나, 본 실시예에서 그 물질을 한정하는 것은 아니다.The second electrode part 120a is a cathode 102, and is a cathode 101 active material coated on both surfaces of an anode 102 current collector made of a conductive metal sheet, for example, copper (Cu) or nickel (Ni) foil. It contains a layer. As the anode 102 active material, a carbon (C) -based material, Si, Sn, tin oxide, composite tin alloys, transition metal oxide, lithium metal nitride, or lithium metal oxide is used. It does not limit the substance.
분리막(130a)은 제1전극부(110a)와 제2전극부(120a)를 분리시키는 구성으로서, 폴리에틸렌, 폴리프로필렌 및 폴리에틸렌과 폴리프로필렌의 공중합체(co-polymer)로 이루어지는 군(group)에서 선택되는 어느 하나로 이루어져 있으나, 본 실시예에서 그 재질을 한정하는 것은 아니다.The separator 130a is configured to separate the first electrode part 110a and the second electrode part 120a, and is formed from a group consisting of polyethylene, polypropylene, and a copolymer of polyethylene and polypropylene. It is made of any one selected, but the material is not limited in this embodiment.
또한, 분리막(130a)은 제1벤딩부(131a), 제2벤딩부(132a), 접촉부(133a)를 포함하여 형성된다.In addition, the separator 130a may be formed to include the first bending part 131a, the second bending part 132a, and the contact part 133a.
제1벤딩부(131a)는 분리막(130a)의 소정 영역이 제1전극부(110a)의 적어도 일부를 감싸면서 제1전극부(110a)의 일단에서 굽혀져서 형성되는 부분이다.The first bending part 131a is a part formed by bending a predetermined region of the separator 130a at one end of the first electrode part 110a while covering at least a portion of the first electrode part 110a.
제2벤딩부(132a)는 분리막(130a)의 소정 영역이 제2전극부(120a)의 적어도 일부를 감싸면서 제2전극부(120a)의 일단에서 굽혀져서 형성되는 부분이다.The second bending part 132a is a part formed by bending a predetermined region of the separator 130a at one end of the second electrode part 120a while covering at least a portion of the second electrode part 120a.
접촉부(133a)는 제1벤딩부(131a) 및 제2벤딩부(132a)에 해당되는 분리막(130a)의 소정 영역이 접혀지면서 서로 맞닿도록 형성되는 구성이다.The contact portion 133a is formed to be in contact with each other while the predetermined regions of the separation membrane 130a corresponding to the first bending portion 131a and the second bending portion 132a are folded.
이에 따라, 본 발명에 따른 전극조립체(100a)는 접촉부(133a)가 구성됨으로서, 분리막(130a)과 제1전극부(110a) 또는 분리막(130a)과 제2전극부(120a) 사이의 빈 공간을 줄일 수 있는 장점이 있다.Accordingly, the electrode assembly 100a according to the present invention includes a contact portion 133a, and thus, an empty space between the separator 130a and the first electrode portion 110a or the separator 130a and the second electrode portion 120a. There is an advantage to reduce.
또한, 접촉부(133a)는 실링부재를 도포하여 접착될 수 있다.In addition, the contact portion 133a may be bonded by applying a sealing member.
또한, 접촉부(133a)는 열융착에 의해 접착 할 수 있다.In addition, the contact portion 133a may be bonded by thermal fusion.
이에 따라, 본 발명에 따른 전극조립체(100a)는 접촉부(133a)가 구성됨으로서, 제1벤딩부(131a) 및 제2벤딩부(132a)를 제1전극부(110a) 및 제2전극부(120a) 측으로 더욱 밀착시켜 분리막(130a)과 제1, 2전극부(110a, 120a) 사이의 빈공간을 더욱 줄일 수 있는 장점이 있다.Accordingly, the electrode assembly 100a according to the present invention includes a contact portion 133a, so that the first bending portion 131a and the second bending portion 132a are formed of the first electrode portion 110a and the second electrode portion ( In close contact with the 120a side, there is an advantage in that the empty space between the separator 130a and the first and second electrode parts 110a and 120a can be further reduced.
도 2는 본 발명의 실시예 1에 따른 제1전극부와 제2전극부가 교번 적층된 다층 구조를 포함하는 전극조립체의 단면도이다.2 is a cross-sectional view of an electrode assembly including a multilayer structure in which a first electrode part and a second electrode part are alternately stacked according to Embodiment 1 of the present invention.
도 2에 도시된 바와 같이, 본 발명의 실시예 1에 따른 전극조립체(100a)는 복수의 제1전극부(110a)와 복수의 제2전극부(120a)가 교번 적층된 다층 구조로 구성될 수 있다.As shown in FIG. 2, the electrode assembly 100a according to the first exemplary embodiment of the present invention has a multilayer structure in which a plurality of first electrode portions 110a and a plurality of second electrode portions 120a are alternately stacked. Can be.
이 때, 분리막(130a)은 제1벤딩부(131a), 제2벤딩부(132a), 접촉부(133a)를 포함하는 지그재그형태로 형성되어 제1전극부(110a) 및 제2전극부(120a)의 적어도 일부를 둘러싸며 교번 적층된 복수의 제1전극부(110a)와 복수의 제2전극부(120)를 각각 분리시킨다.In this case, the separator 130a is formed in a zigzag form including the first bending part 131a, the second bending part 132a, and the contact part 133a to form the first electrode part 110a and the second electrode part 120a. The plurality of first electrode portions 110a and the plurality of second electrode portions 120 that are alternately stacked and enclosed at least a portion of the plurality of second electrodes 120 are separated from each other.
도 3는 본 발명의 실시예 2에 따른 전극조립체(100)의 단면도이다.3 is a cross-sectional view of an electrode assembly 100 according to Embodiment 2 of the present invention.
도 3에 도시된 바와 같이, 본 발명의 실시예 2에 따른 전극조립체(100b)는 제1전극부(110b), 제2전극부(120b), 분리막(130b)을 포함하여 형성된다.As shown in FIG. 3, the electrode assembly 100b according to Embodiment 2 of the present invention includes a first electrode part 110b, a second electrode part 120b, and a separator 130b.
제1전극부(110b)와 제2전극부(120b)는 순차적으로 양극(101), 분리 필름(103), 음극(102)이 적층되거나 순차적으로 음극(102), 분리 필름(103), 양극(101)이 적층되는 풀셀로 각각 형성된다.The first electrode part 110b and the second electrode part 120b are sequentially stacked with the anode 101, the separation film 103, and the cathode 102, or sequentially with the cathode 102, the separation film 103, and the anode. Each of the 101 cells is formed of a stacked full cell.
또한, 본 발명의 실시예 2에 따른 전극조립체(100b)는 제1전극부(110b)가 순차적으로 양극(101), 분리 필름(103), 음극(102)이 적층되는 풀셀(Full cell)의 구조로 형성되고, 제2전극부(120b)가 순차적으로 음극(102), 분리 필름(103), 음극(102)이 적층되는 구조로도 형성될 수 있다.In addition, the electrode assembly 100b according to the second exemplary embodiment of the present invention includes a full cell in which the first electrode part 110b is sequentially stacked with the anode 101, the separation film 103, and the cathode 102. The second electrode part 120b may be formed in a structure in which the cathode 102, the separation film 103, and the cathode 102 are sequentially stacked.
또한, 본 발명의 실시예 2에 따른 전극조립체(100b)는 제1전극부(110b)가 순차적으로 음극(102), 분리 필름(103), 양극(101)이 적층되는 풀셀의 구조로 형성되고, 제2전극부(120b)가 순차적으로 양극(101), 분리 필름(103), 음극(102)이 적층되는 구조로도 형성될 수 있다.In addition, the electrode assembly 100b according to the second embodiment of the present invention is formed in a structure of a full cell in which the first electrode part 110b is sequentially stacked with a cathode 102, a separation film 103, and an anode 101. In addition, the second electrode part 120b may be formed to have a structure in which the anode 101, the separation film 103, and the cathode 102 are sequentially stacked.
또한, 제1전극부(110b) 및 제2전극부(120b)는 각각 복수개로 구성되어 교번 적층되는 것이 전극조립체(100b)의 전체적인 전력 용량을 높이기 위하여 바람직하다.In addition, it is preferable that the first electrode part 110b and the second electrode part 120b are composed of a plurality of alternating layers to increase the overall power capacity of the electrode assembly 100b.
도 3에는 1전극부(110b) 및 제2전극부(120b)가 순차적으로 양극(101), 분리 필름(103), 음극(102)이 적층되는 풀셀로 형성되되, 복수의 제1전극부(110b)와 복수의 제2전극부(120b)가 교번 적층된 구조를 도시하였다.In FIG. 3, the first electrode part 110b and the second electrode part 120b are formed of a full cell in which the anode 101, the separation film 103, and the cathode 102 are sequentially stacked, and the plurality of first electrode parts ( 110b) and the plurality of second electrode portions 120b are alternately stacked.
양극(101)과 음극(102)은 위에서 설명하였으므로 추가설명은 생략하며, 분리 필름(103)은 분리막(130b)과 동일한 재질로 형성된다.Since the positive electrode 101 and the negative electrode 102 have been described above, further description is omitted, and the separation film 103 is formed of the same material as the separator 130b.
분리막(130b)은 제1벤딩부(131b), 제2벤딩부(132b), 접촉부(133b)를 포함하는 지그재그형태로 형성되어 제1전극부(110b) 및 제2전극부(120b)의 적어도 일부를 둘러싸며, 교번 적층된 제1전극부(110b)와 제2전극부(120b)를 각각 분리시킨다.The separator 130b is formed in a zigzag form including the first bending part 131b, the second bending part 132b, and the contact part 133b to form at least one of the first electrode part 110b and the second electrode part 120b. The first electrode part 110b and the second electrode part 120b, which are alternately stacked and partially stacked, are separated from each other.
도 4는 본 발명의 실시예 3에 따른 전극조립체의 단면도이다.4 is a cross-sectional view of an electrode assembly according to a third exemplary embodiment of the present invention.
도 4에 도시된 바와 같이, 본 발명의 실시예 3에 따른 전극조립체(100c)는 제1전극부(110c), 제2전극부(120c), 분리막(130c)을 포함하여 형성된다.As shown in FIG. 4, the electrode assembly 100c according to the third exemplary embodiment of the present invention includes a first electrode part 110c, a second electrode part 120c, and a separator 130c.
제1전극부(110c)와 제2전극부(120c)는 순차적으로 양극(101), 분리 필름(103), 음극(102), 분리 필름(103), 양극(101)이 적층되거나 순차적으로 음극(102), 분리 필름(103), 양극(101), 분리 필름(103), 음극(102)이 적층되는 바이셀(bi-cell)로 각각 형성된다.The first electrode part 110c and the second electrode part 120c are sequentially stacked with the anode 101, the separator film 103, the cathode 102, the separator film 103, and the anode 101 or the cathode sequentially. The 102, the separation film 103, the positive electrode 101, the separation film 103, and the negative electrode 102 are each formed of a bi-cell (bi-cell) is laminated.
그러나 본 발명의 실시예 3에 따른 전극조립체(100c)는 제1전극부(110)가 순차적으로 양극(101), 분리 필름(103), 음극(102), 분리 필름(103), 양극(101)이 적층되는 풀셀의 구조로 형성되고, 제2전극부(120)가 순차적으로 음극(102), 분리 필름(103), 양극(101), 분리 필름(103), 음극(102)이 적층되는 구조로도 형성될 수 있다.However, in the electrode assembly 100c according to the third exemplary embodiment of the present invention, the first electrode part 110 may sequentially have a positive electrode 101, a separation film 103, a negative electrode 102, a separation film 103, and an anode 101. ) Is formed in a full cell structure in which the second electrode part 120 is sequentially stacked with the cathode 102, the separation film 103, the anode 101, the separation film 103, and the cathode 102. It may also be formed into a structure.
또한, 제1전극부(110c) 및 제2전극부(110c)는 각각 복수개로 구성되어 교번 적층되는 것이 전극조립체(100c)의 전체적인 전력 용량을 높이기 위하여 바람직하다.In addition, it is preferable that the first electrode part 110c and the second electrode part 110c are configured in plural and alternately stacked in order to increase the overall power capacity of the electrode assembly 100c.
도 4에는 1전극부(110c) 및 제2전극부(120c)가 순차적으로 양극(101), 분리 필름(103), 음극(102), 분리 필림(103), 양극(101)이 적층되는 바이셀의 구조로 형성되되, 복수의 제1전극부(110c)와 복수의 제2전극부(120c)가 교번 적층된 구조를 도시하였다.In FIG. 4, the first electrode part 110c and the second electrode part 120c are sequentially stacked with the positive electrode 101, the separation film 103, the negative electrode 102, the separation film 103, and the positive electrode 101. A structure in which a cell is formed and a plurality of first electrode portions 110c and a plurality of second electrode portions 120c are alternately stacked is illustrated.
양극(101), 음극(102), 분리 필름(103)은 위에서 설명하였으므로 추가설명은 생략한다.Since the positive electrode 101, the negative electrode 102, and the separation film 103 have been described above, further description thereof will be omitted.
분리막(130c)은 제1벤딩부(131c), 제2벤딩부(132c), 접촉부(133c)를 포함하는 지그재그형태로 형성되어 제1전극부(110c) 및 제2전극부(120c)의 적어도 일부를 둘러싸며 교번 적층된 제1전극부(110c)와 제2전극부(120c)를 각각 분리시킨다.The separator 130c is formed in a zigzag form including the first bending part 131c, the second bending part 132c, and the contact part 133c to form at least one of the first electrode part 110c and the second electrode part 120c. The first electrode part 110c and the second electrode part 120c, which are alternately stacked and partially stacked, are separated from each other.
이에 따라, 본 발명의 실시예 2, 3에 따른 전극조립체는 풀셀 또는 바이셀이 적층된 형태로 형성되어 전극 활물질의 함량을 극대화 하면서도, 분리막과 제1전극부 및 제2전극부 사이의 빈 공간을 줄일 수 있는 장점이 있다.Accordingly, the electrode assembly according to Embodiments 2 and 3 of the present invention is formed in a stacked form of a full cell or bicell, while maximizing the content of the electrode active material, while the empty space between the separator and the first electrode part and the second electrode part. There is an advantage to reduce.
도 5 내지 도 6은 본 발명의 실시예에 따른 전극조립체를 포함하는 배터리셀의 여러 실시예이다.5 to 6 are various embodiments of a battery cell including an electrode assembly according to an embodiment of the present invention.
도 5에 도시된 바와 같이, 본 발명의 실시예에 따른 전극조립체를 포함하는 배터리셀(1000a)의 일실시예는 전극조립체, 제1전극접합부(140a), 제2전극접합부(150a), 제1전극탭(145a), 제2전극탭(155a), 케이스(200a)를 포함하여 형성된다.As shown in FIG. 5, one embodiment of a battery cell 1000a including an electrode assembly according to an exemplary embodiment of the present invention may include an electrode assembly, a first electrode junction 140a, a second electrode junction 150a, and a second electrode assembly 150a. The first electrode tab 145a, the second electrode tab 155a, and the case 200a are formed.
전극조립체는 본 발명의 실시예 1에 따른 전극조립체(100a)로 형성되는 것이 바람직하나. 본 발명은 이에 한정되지 않고, 본 발명의 기술적 사상을 포함하는 또 다른 실시예의 전극조립체로도 적용이 가능하다.Electrode assembly is preferably formed of an electrode assembly (100a) according to the first embodiment of the present invention. The present invention is not limited to this, and may be applied to an electrode assembly of another embodiment including the technical idea of the present invention.
제1전극접합부(140a)는 전극조립체(100a)에 구성된 제1전극부(110a)에서 각각 일측으로 연장 형성되며, 각각의 일단이 접합된다.The first electrode junction 140a extends from one side of each of the first electrode portions 110a of the electrode assembly 100a, and each end of the first electrode junction 140a is joined.
제2전극접합부(150a)는 전극조립체(100)에 구성된 제2전극부(120)에서 각각 일측으로 연장 형성되며, 각각의 일단이 접합된다.The second electrode bonding part 150a is formed to extend from one side to the second electrode part 120 of the electrode assembly 100, and one end of each of the second electrode bonding part 150a is joined.
제1전극탭(145a) 및 제2전극탭(155a)은 전원연결을 위한 구성으로서, 제1전극접합부(140a) 및 제2전극접합부(150a)에 각각 접합된다.The first electrode tab 145a and the second electrode tab 155a are connected to the first electrode tab 140a and the second electrode tab 150a as a configuration for power connection.
케이스(200a)는 내부에 전극조립체(100a), 제1전극접합부(140a) 및 제2전극접합부(150a)가 수용되며, 제1전극탭(145a) 및 제2전극탭(155a)이 외측으로 노출되도록 밀봉되되, 서로 접합되는 둘레면에 실링부재를 도포하여 실링된 밀봉부(A)가 형성된다.In the case 200a, an electrode assembly 100a, a first electrode junction 140a, and a second electrode junction 150a are accommodated therein, and the first electrode tab 145a and the second electrode tab 155a are disposed to the outside. Sealed so as to be exposed, the sealing member (A) is formed by applying a sealing member on the circumferential surface bonded to each other.
또한, 케이스(200)는 알루미늄이나 알루미늄 합금 또는 니켈이 도금된 스틸 등과 같은 도전성 금속재로 이루어진다.In addition, the case 200 is made of a conductive metal material such as aluminum, aluminum alloy or nickel plated steel.
도 6에 도시된 바와 같이, 본 발명의 실시예에 따른 전극조립체를 포함하는 배터리셀(1000b)의 또 다른 실시예는 전극조립체, 제1전극접합부(140b), 제2전극접합부(150b), 제1전극탭(145b), 제2전극탭(155b), 케이스(200b)를 포함하여 형성된다.As shown in FIG. 6, another embodiment of a battery cell 1000b including an electrode assembly according to an exemplary embodiment of the present invention includes an electrode assembly, a first electrode junction 140b, a second electrode junction 150b, The first electrode tab 145b, the second electrode tab 155b, and the case 200b are formed.
전극조립체는 본 발명의 실시예 1에 따른 전극조립체(100a)로 형성되는 것이 바람직하나, 본 발명은 이에 한정되지 않고, 본 발명의 기술적 사상을 포함하는 또 다른 실시예의 전극조립체로도 적용이 가능하다.The electrode assembly is preferably formed of the electrode assembly 100a according to the first embodiment of the present invention, but the present invention is not limited thereto and may be applied to the electrode assembly of another embodiment including the technical idea of the present invention. Do.
제1전극접합부(140b)는 전극조립체(100b)에 구성된 제1전극부(110b)에서 각각 일측방향으로 연장 형성되며, 각각의 일단이 접합된다.The first electrode bonding part 140b is formed to extend in one direction from the first electrode part 110b of the electrode assembly 100b, and each end of the first electrode bonding part 140b is joined.
제2전극접합부(150b)는 전극조립체(100b)에 구성된 제2전극부(120b)에서 각각 타측방향으로 연장 형성되며, 각각의 일단이 접합된다.The second electrode bonding portion 150b is formed to extend in the other direction from the second electrode portion 120b of the electrode assembly 100b, and one end of the second electrode bonding portion 150b is joined.
제1전극탭(145b) 및 제2전극탭(155b)은 전원연결을 위한 구성으로서, 제1전극접합부(140b) 및 제2전극접합부(150b)에 각각 접합된다.The first electrode tab 145b and the second electrode tab 155b are connected to the first electrode junction 140b and the second electrode junction 150b as a configuration for connecting power.
케이스(200b)는 내부에 전극조립체(100b), 제1전극접합부(140b) 및 제2전극접합부(150b)가 수용되며, 제1전극탭(145b) 및 제2전극탭(155b)이 외측으로 노출되도록 밀봉되되, 서로 접합되는 둘레면에 실링부재를 도포하여 실링된 밀봉부(A)가 형성된다.The case 200b includes an electrode assembly 100b, a first electrode junction 140b, and a second electrode junction 150b disposed therein, and the first electrode tab 145b and the second electrode tab 155b are disposed outward. Sealed so as to be exposed, the sealing member (A) is formed by applying a sealing member on the circumferential surface bonded to each other.
이에 따라, 본 발명의 배터리셀은 분리막과 제1전극부 또는 분리막과 제2전극부 사이의 빈공간을 줄일 수 있는 전극조립체를 포함하는 배터리셀을 구성함으로서, 분리막과 제1전극부 및 제2전극부가 서로 효율적으로 밀착됨에 따라, 전극조립체를 둘러싸는 케이스의 크기를 줄일 수 있는 장점이 있다.Accordingly, the battery cell of the present invention constitutes a battery cell including an electrode assembly capable of reducing the empty space between the separator and the first electrode part or the separator and the second electrode part, thereby separating the separator and the first electrode part and the second electrode part. As the electrode parts are in close contact with each other efficiently, there is an advantage of reducing the size of the case surrounding the electrode assembly.
또한, 본 발명은 각형 전지에도 적용될 수 있으며, 상기한 실시예들에 한정되지 아니한다.In addition, the present invention can be applied to a rectangular battery, and is not limited to the above-described embodiments.
본 발명은 상기한 실시예에 한정되지 아니하며, 적용범위가 다양함은 물론이고, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 다양한 변형 실시가 가능한 것은 물론이다.The present invention is not limited to the above-described embodiments, and the scope of application is not limited, and various modifications can be made without departing from the gist of the present invention as claimed in the claims.
(부호의 설명)(Explanation of the sign)
1000a, b : 본 발명의 배터리셀1000a, b: battery cell of the present invention
100a, b, c : 전극조립체100a, b, c: electrode assembly
101 : 양극 102 : 음극 101: anode 102: cathode
103 : 분리 필름103: separation film
110a, b, c : 제1전극부 120a, b, c : 제2전극부110a, b, c: first electrode portion 120a, b, c: second electrode portion
130a, b, c : 분리막130a, b, c: separator
131a, b, c : 제1벤딩부 132a, b, c : 제2벤딩부131a, b, c: first bending part 132a, b, c: second bending part
133a, b, c : 접촉부133a, b, c: contact
140a, b : 제1전극접합부 145a, b : 제1전극탭 140a, b: first electrode junction 145a, b: first electrode tab
150a, b : 제2전극접합부 155a, b : 제2전극탭150a, b: second electrode junction 155a, b: second electrode tab
200a, b : 케이스200a, b: case
A : 밀봉부   A: sealing part

Claims (9)

  1. 제1전극부, 제2전극부, 및 상기 제1전극부와 상기 제2전극부를 분리하는 분리막을 포함하는 전극조립체; An electrode assembly including a first electrode part, a second electrode part, and a separator separating the first electrode part and the second electrode part;
    상기 제1전극부 및 제2전극부에 각각 연결되는 제1전극탭 및 제2전극탭; 및First and second electrode tabs connected to the first and second electrode portions, respectively; And
    상기 제1전극탭 및 제2전극탭이 외부로 노출되며 상기 제1전극부, 제2전극부 및 분리막을 내부에 수납하는 케이스;를 포함하며,And a case in which the first electrode tab and the second electrode tab are exposed to the outside and accommodate the first electrode portion, the second electrode portion, and the separator therein.
    상기 분리막은 상기 제1전극부와 제2전극부의 적어도 일부를 감싸며 상기 제1전극부의 일단에서 굽힘 형성되는 제1벤딩부와 상기 제2전극부의 일단에서 굽힘 형성되는 제2벤딩부를 포함하고,The separator includes at least a portion of the first electrode part and the second electrode part, the first bending part bent at one end of the first electrode part and the second bending part bent at one end of the second electrode part.
    상기 제1벤딩부 및 상기 제2벤딩부는 상기 분리막이 접혀져서 그 면이 서로 맞닿도록 형성되는 접촉부를 포함하는 배터리셀.The first bent part and the second bent part include a battery cell including a contact part formed so that the separators are folded to be in contact with each other.
  2. 제1항에 있어서, 상기 접촉부는The method of claim 1, wherein the contact portion
    상기 분리막의 면이 서로 접착되는 배터리셀.Battery cells that the surfaces of the separator are bonded to each other.
  3. 제2항에 있어서, 상기 접촉부는The method of claim 2, wherein the contact portion
    상기 분리막의 면이 열융착에 의해 접착되는 배터리셀.A battery cell is bonded to the surface of the separator by thermal fusion.
  4. 제1항에 있어서, 상기 전극조립체는The method of claim 1, wherein the electrode assembly
    상기 제1전극부가 양극이고, 상기 제2전극부가 음극인 배터리셀.The battery cell of claim 1, wherein the first electrode portion is an anode and the second electrode portion is a cathode.
  5. 제4항에 있어서, 상기 전극조립체는The method of claim 4, wherein the electrode assembly
    복수의 상기 제1전극부와 복수의 상기 제2전극부가 교번 적층되고,A plurality of first electrode portions and a plurality of second electrode portions are alternately stacked;
    상기 분리막은 지그재그형태로 형성되어 교번 적층된 상기 제1전극부와 제2전극부를 각각 분리시키는 배터리셀.The separator is formed in a zigzag form battery cell for separating the first electrode portion and the second electrode portion alternately stacked.
  6. 제1항에 있어서, 상기 전극조립체는The method of claim 1, wherein the electrode assembly
    상기 제1전극부 및 상기 제1전극부가 순차적으로 양극, 분리 필름, 음극이 적층되거나 순차적으로 음극, 분리 필름, 양극이 적층된 풀셀인 배터리셀.The first electrode part and the first electrode part is a battery cell is a full cell in which the positive electrode, the separation film, the negative electrode is sequentially stacked or the negative electrode, the separation film, and the positive electrode are sequentially stacked.
  7. 제6항에 있어서, 상기 전극조립체는The method of claim 6, wherein the electrode assembly
    복수의 상기 제1전극부와 복수의 상기 제2전극부가 교번 적층되고,A plurality of first electrode portions and a plurality of second electrode portions are alternately stacked;
    상기 분리막은 지그재그형태로 형성되어 교번 적층된 상기 제1전극부와 제2전극부를 각각 분리시키는 배터리셀.The separator is formed in a zigzag form battery cell for separating the first electrode portion and the second electrode portion alternately stacked.
  8. 제1항에 있어서, 상기 전극조립체는The method of claim 1, wherein the electrode assembly
    상기 제1전극부 및 상기 제1전극부가 순차적으로 양극, 분리 필름, 음극, 분리 필름, 양극이 적층되거나 순차적으로 음극, 분리 필름, 양극, 분리 필름, 음극이 적층된 바이셀인 배터리셀.The first electrode part and the first electrode part is a bi-cell in which the positive electrode, the separation film, the negative electrode, the separation film, the positive electrode is sequentially laminated or the negative electrode, the separation film, the positive electrode, the separation film, the negative electrode is sequentially stacked.
  9. 제8항에 있어서, 상기 전극조립체는The method of claim 8, wherein the electrode assembly
    복수의 상기 제1전극부와 복수의 상기 제2전극부가 교번 적층되고,A plurality of first electrode portions and a plurality of second electrode portions are alternately stacked;
    상기 분리막은 지그재그형태로 형성되어 교번 적층된 상기 제1전극부와 제2전극부를 각각 분리시키는 배터리셀.The separator is formed in a zigzag form battery cell for separating the first electrode portion and the second electrode portion alternately stacked.
PCT/KR2013/001185 2012-04-02 2013-02-15 Battery cell WO2013151233A1 (en)

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