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WO2013151233A1 - Cellule de batterie - Google Patents

Cellule de batterie 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
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
separator
battery cell
separation film
electrode assembly
Prior art date
Application number
PCT/KR2013/001185
Other languages
English (en)
Korean (ko)
Inventor
공명철
Original Assignee
에스케이이노베이션 주식회사
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
Application filed by 에스케이이노베이션 주식회사 filed Critical 에스케이이노베이션 주식회사
Publication of WO2013151233A1 publication Critical patent/WO2013151233A1/fr

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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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

L'invention concerne une cellule de batterie qui comprend un ensemble d'électrodes comprenant une première partie d'électrode, une seconde partie d'électrode, et une membrane de séparation qui sépare la première partie d'électrode de la seconde partie d'électrode, une première languette d'électrode et une seconde languette d'électrode qui sont connectées à la première partie d'électrode et la seconde partie d'électrode, respectivement et un boîtier dans lequel la première languette d'électrode et la seconde languette d'électrode sont exposées à l'extérieur, où le boîtier loge la première partie d'électrode, la seconde partie d'électrode, et la membrane de séparation à l'intérieur de celui-ci. La membrane de séparation comprend une première partie de courbure entourant au moins une partie de la première partie d'électrode et de la seconde partie d'électrode, où la première partie de courbure est courbée au niveau d'une extrémité de la première partie d'électrode et la seconde partie de courbure est courbée au niveau d'une extrémité de la seconde partie d'électrode. La première partie de courbure et la seconde partie de courbure comprennent des parties de contact qui viennent en contact l'une avec l'autre lorsque la membrane de séparation est pliée.
PCT/KR2013/001185 2012-04-02 2013-02-15 Cellule de batterie WO2013151233A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020120033754A KR101901370B1 (ko) 2012-04-02 2012-04-02 배터리셀
KR10-2012-0033754 2012-04-02

Publications (1)

Publication Number Publication Date
WO2013151233A1 true WO2013151233A1 (fr) 2013-10-10

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KR (1) KR101901370B1 (fr)
WO (1) WO2013151233A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2554860A (en) * 2016-10-04 2018-04-18 Saralon Gmbh Thin printed battery
CN109860490A (zh) * 2017-11-30 2019-06-07 宁德新能源科技有限公司 电芯、电池以及电芯的隔离膜的封装方法
US11437651B2 (en) * 2016-09-06 2022-09-06 Samsung Sdi Co., Ltd. Stacked electrode assembly and flexible rechargeable battery comprising the same

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101646313B1 (ko) * 2013-12-11 2016-08-05 현대자동차주식회사 바이폴라 셀 및 그 제조방법
US10985364B2 (en) 2017-02-28 2021-04-20 Korea Advanced Institute Of Science And Technology Pliable carbonaceous pocket composite structure, method for preparing the same, electrode, including the same, and energy storage device including the electrode
WO2018159938A1 (fr) 2017-02-28 2018-09-07 한국과학기술원 Structure composite de poche de carbone flexible, procédé permettant de fabriquer cette dernière, électrode comprenant cette dernière et dispositif de stockage d'énergie comprenant ladite électrode
KR102666729B1 (ko) * 2021-03-22 2024-05-16 주식회사 엘지에너지솔루션 전극 조립체 및 이를 포함하는 이차전지
KR20230110024A (ko) * 2022-01-14 2023-07-21 주식회사 엘지에너지솔루션 이차전지 및 이의 제조방법
US20250079528A1 (en) * 2022-01-14 2025-03-06 Lg Energy Solution, Ltd. Secondary Battery and Preparation Method Thereof

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US20030170533A1 (en) * 2000-06-30 2003-09-11 Airey Matthew Martin Method of assembling a cell
KR20050010611A (ko) * 2003-07-21 2005-01-28 한국 파워셀 주식회사 리튬이온 이차전지 및 그 제조방법
KR20100051353A (ko) * 2008-11-07 2010-05-17 주식회사 엘지화학 중첩 전기화학소자
JP2011113843A (ja) * 2009-11-27 2011-06-09 Hitachi Maxell Ltd 扁平形非水二次電池
KR20110122378A (ko) * 2010-05-04 2011-11-10 삼성에스디아이 주식회사 전극 조립체 및 이를 이용한 이차 전지

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030170533A1 (en) * 2000-06-30 2003-09-11 Airey Matthew Martin Method of assembling a cell
KR20050010611A (ko) * 2003-07-21 2005-01-28 한국 파워셀 주식회사 리튬이온 이차전지 및 그 제조방법
KR20100051353A (ko) * 2008-11-07 2010-05-17 주식회사 엘지화학 중첩 전기화학소자
JP2011113843A (ja) * 2009-11-27 2011-06-09 Hitachi Maxell Ltd 扁平形非水二次電池
KR20110122378A (ko) * 2010-05-04 2011-11-10 삼성에스디아이 주식회사 전극 조립체 및 이를 이용한 이차 전지

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11437651B2 (en) * 2016-09-06 2022-09-06 Samsung Sdi Co., Ltd. Stacked electrode assembly and flexible rechargeable battery comprising the same
GB2554860A (en) * 2016-10-04 2018-04-18 Saralon Gmbh Thin printed battery
CN109860490A (zh) * 2017-11-30 2019-06-07 宁德新能源科技有限公司 电芯、电池以及电芯的隔离膜的封装方法
CN109860490B (zh) * 2017-11-30 2022-08-12 宁德新能源科技有限公司 电芯、电池以及电芯的隔离膜的封装方法

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KR101901370B1 (ko) 2018-09-21
KR20130111697A (ko) 2013-10-11

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