WO2015046744A1 - Élément de batterie de type poche comprenant un élément film destiné à protéger la jonction entre le fil d'électrode et une patte d'électrode - Google Patents

Élément de batterie de type poche comprenant un élément film destiné à protéger la jonction entre le fil d'électrode et une patte d'électrode Download PDF

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Publication number
WO2015046744A1
WO2015046744A1 PCT/KR2014/007260 KR2014007260W WO2015046744A1 WO 2015046744 A1 WO2015046744 A1 WO 2015046744A1 KR 2014007260 W KR2014007260 W KR 2014007260W WO 2015046744 A1 WO2015046744 A1 WO 2015046744A1
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WO
WIPO (PCT)
Prior art keywords
battery cell
electrode
film member
type battery
electrode lead
Prior art date
Application number
PCT/KR2014/007260
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English (en)
Korean (ko)
Inventor
유재훈
정태윤
한창민
조지훈
남상봉
Original Assignee
주식회사 엘지화학
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Publication date
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to CN201480050254.2A priority Critical patent/CN105684183B/zh
Priority to JP2016540791A priority patent/JP6204598B2/ja
Publication of WO2015046744A1 publication Critical patent/WO2015046744A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/121—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
    • H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/193—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/197—Sealing members characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/198—Sealing members characterised by the material characterised by physical properties, e.g. adhesiveness or hardness
    • 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
    • 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
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H01M50/557—Plate-shaped terminals
    • 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
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the present invention relates to a pouch-type battery cell comprising a film member for protecting the electrode lead-electrode tab coupling portion.
  • lithium secondary batteries with high energy density, high operating voltage, and excellent storage and life characteristics are used for various mobile devices as well as various electronic products. It is widely used as an energy source.
  • Lithium secondary batteries are largely classified into cylindrical batteries, square batteries, pouch-type batteries, and the like according to their appearance, and may be classified into lithium ion batteries, lithium ion polymer batteries, lithium polymer batteries, and the like depending on the type of electrolyte.
  • a pouch type battery refers to a battery in which an electrode assembly and an electrolyte are sealed inside a pouch type case of a laminate sheet including a resin layer and a metal layer.
  • the electrode assembly accommodated in the battery case may have a structure of jelly-roll type (wound type), stacked type (stacked type), or complex type (stack / folding type).
  • FIG. 1 schematically illustrates a structure of a pouch-type battery cell including a stacked electrode assembly.
  • an electrode assembly 30 including an anode, a cathode, and a separator disposed therebetween is formed inside the pouch-type battery case 20.
  • the two electrode leads 40 and 41 electrically connected to the 31 and 32 may be sealed to be exposed to the outside.
  • the battery case 20 includes a case body 21 including a recess 23 having a concave shape in which the electrode assembly 30 may be seated, and a cover 22 integrally connected to the body 21. Can be.
  • the battery case may include a lower case including a concave shape receiving portion in which the electrode assembly may be seated, and an upper case sealing the electrode assembly as a cover of the lower case.
  • the battery case 20 may be formed of a laminate sheet, and may include a barrier metal layer 20a for preventing the penetration of a material, and an inner resin layer 20b for sealing.
  • a plurality of positive electrode tabs 31 and a plurality of negative electrode tabs 32 may be fused to each other and coupled to the electrode leads 40 and 41.
  • a heat sealer (not shown)
  • the insulating film 50 may be attached to upper and lower surfaces of the electrode leads 40 and 41 in order to prevent it and to secure the sealing property between the electrode leads 40 and 41 and the battery case 20.
  • such a pouch-type battery cell is less susceptible to external impact than a can-type battery, and has an insulation resistance when an external force is applied to a portion where the electrode tab and the electrode lead are coupled, or when the inner resin layer of the laminate sheet constituting the battery case is small. There is a problem that this becomes small or short occurs. In addition, even if an insulating film is attached to the electrode lead, there is a disadvantage that the leakage occurs in this area.
  • some prior art discloses a battery cell having a structure in which a protective tape is attached to protect a portion where the electrode lead and the electrode tab are coupled, but such a structure has a portion where the protective tape is attached to the battery case.
  • the sealing tape is sealed by heat fusion, the protective tape has a problem in that insulation failure occurs due to deformation or breakage due to interference caused by heat.
  • the present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.
  • An object of the present invention by using a structure that wraps the electrode lead-electrode tab connection portion of the battery cell with a film member, a pouch of the structure to improve the safety by solving problems such as reduced insulation resistance, leakage, swelling due to high temperature It is to provide a type battery cell.
  • the electrode assembly is embedded in a battery cell case of a laminate sheet including a material barrier metal layer and a heat sealable first resin layer,
  • the electrode lead protrudes out of the battery cell case while the electrode tabs of the electrode assembly are connected to an electrode lead as an electrode terminal.
  • the outer peripheral surface of the battery cell case is sealed by thermal fusion of the first resin layer
  • the film member of the same material as the first resin layer may include a structure surrounding the connection portion between the electrode tab and the electrode lead.
  • the pouch-type battery cell according to the present invention has a structure of surrounding the film member in a connection portion between the electrode tab and the electrode lead and includes a structure for protecting the connection portion.
  • the film member is formed of the same material as that of the heat-sealable first resin layer of the laminate sheet, so that problems such as insulation, leakage, and swelling due to high temperature may occur even if interference occurs during the heat-sealing of the battery cell case. It consists of a structure to prevent the occurrence of.
  • the laminate sheet may be formed in a structure including a second resin layer as an outer coating layer, in addition to the metal layer and the first resin layer.
  • the second resin layer insulates the metal layer from the outside, and may be configured to protect the battery case from the outside by using a material having excellent durability or rigidity.
  • the material of the first resin layer is not electrically limited as a material capable of thermal fusion without affecting the operation of the battery as an electrically insulating material, for example, stiffness, repeated fatigue resistance, and It may be a polypropylene resin layer excellent in chemical resistance.
  • the first resin layer may be configured to include a non-stretched polypropylene (CPP) excellent in heat sealability among the polypropylene resin.
  • the film member may also be formed in a structure including lead-free polypropylene.
  • the film member is a structure surrounding the connection portion of the electrode tab and the electrode lead is not limited in shape, for example, consisting of two adhesive films for each of the connection portion of the electrode tab and the electrode lead,
  • the adhesive films may have a structure in which they are attached to each other while surrounding the connection site.
  • the film member may be formed of one adhesive film for each of the connection portions of the electrode tab and the electrode lead, and may have a structure in which the one adhesive film is attached to surround the connection portion.
  • the film member may have a size surrounding the coupling portion of the electrode tab and the electrode lead, and the width of the film member may be formed to be at least the width of the coupling portion of the electrode tab and the electrode lead.
  • the width of the film member may have a size of 100% to 200% of the width of the coupling portion of the electrode tab and the electrode lead. That is, the width of the film member may be formed in a range of 100% to 200% with respect to the width of the coupling portion of the electrode tab and the electrode lead, it may be formed of a structure that completely surrounds the coupling portion of the electrode tab and the electrode lead. have.
  • Such a film member may be attached to the coupling portion in a structure in which its lower end in the longitudinal direction (height direction) coincides with the lower end of the coupling portion of the electrode tab and the electrode lead or extends downward from the lower end of the coupling portion.
  • the film member surrounds the coupling portion of the electrode tab and the electrode lead, the upper end in the longitudinal direction (height direction) of the film member is formed to have a structure located above the upper end of the coupling portion of the electrode tab and electrode lead.
  • a structure are as follows.
  • an insulating film is interposed between the electrode lead and the sealing portion of the battery cell case, and the film member has a structure in which an upper end of the length direction (height direction) is attached to surround a portion of the insulating film.
  • an insulating film is interposed between the electrode lead and the sealing portion of the battery cell case, and the film member is formed to have a structure in which an upper end in a longitudinal direction (height direction) is attached to cover the entirety of the insulating film.
  • an insulating film is interposed between the electrode lead and the sealing portion of the battery cell case, and the film member is formed in a structure in which an upper end in a length direction (height direction) is attached to contact the lower end of the insulating film.
  • the film member may have a thickness of 40 to 60 micrometers. If the thickness of the film member is too thick, the tension during the heat shrinkage can greatly reduce the adhesive strength, on the contrary, if the thickness is too thin, it is not preferable because the physical properties are smaller.
  • the film member may be added to the adhesive layer on the base material of the same material as the first resin layer in order to improve the adhesion.
  • the adhesive layer is not particularly limited as a material providing adhesiveness without reacting with the electrolyte solution inside the battery cell, and may be formed of, for example, an acrylic resin.
  • the substrate and the adhesive layer may be formed to an appropriate thickness to effectively exhibit the physical properties of the substrate and the adhesive performance by the adhesive layer.
  • the thickness of the film member may be formed to 40 to 60 micrometers, wherein the thickness of the substrate may be formed to 35 to 45 micrometers, the thickness of the adhesive layer It may be formed from 5 to 15 micrometers.
  • the battery cell may be a lithium ion battery or a lithium ion polymer battery cell, but is not limited thereto.
  • the present invention also provides a battery pack comprising at least one of the battery cells.
  • the battery pack may be formed of a structure in which one battery cell is mounted, or a structure of high output or large capacity in which a plurality of battery cells are connected in series and / or in parallel.
  • the present invention also provides a device including the battery pack.
  • the device is selected from a mobile phone, a portable computer, a smartphone, a tablet PC, a smart pad, a netbook, a LEV (Light Electronic Vehicle), an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, and a power storage device.
  • LEV Light Electronic Vehicle
  • FIG. 1 is an exploded perspective view of a conventional pouch-type battery cell
  • FIG. 2 is a schematic diagram showing a structure in which a film member is added to an electrode tab-electrode lead coupling portion according to an embodiment of the present invention
  • FIG. 3 is an enlarged view of a portion A of FIG. 2;
  • FIG. 4 is a cross-sectional view of the battery cell case of Figure 2 and a cross-sectional view of the film member;
  • 5 to 7 are schematic views showing a structure in which a film member is added to an electrode tab-electrode lead coupling portion according to another embodiment of the present invention.
  • FIG. 2 is a schematic view of a structure in which a film member is added to an electrode tab-electrode lead coupling portion according to an embodiment of the present invention
  • FIG. 3 is an enlarged view of a portion A of FIG. 4 is a cross-sectional view of the battery cell case of Figure 2 and a cross-sectional view of the film member.
  • the pouch-type battery cell 100 has a structure in which the electrode assembly 110 is built in the battery cell case 120.
  • the battery cell case 120 of the laminate sheet includes a metal layer 127 and a first resin layer 128, and the outer circumferential surface of the battery cell case 110 is sealed by thermal fusion of the first resin layer 128. It consists of a structure.
  • connection portion 130 is attached to the structure wrapped around the film member 140, the connection portion of the electrode tab 112 and the electrode lead 130 is made of a structure that is protected by the film member 140.
  • the laminate sheet is composed of a structure including a metal barrier material 127, a heat sealable first resin layer 128, and a second resin layer 129 as an outer coating layer.
  • the second resin layer 129 insulates the metal layer 127 from the outside and is formed of a material having excellent durability or rigidity to protect the battery cell case 120 from the outside.
  • the first resin layer 128 is a polypropylene-based resin layer having excellent repeated fatigue resistance and chemical resistance, and is composed of a structure including unstretched polypropylene (CPP).
  • CPP unstretched polypropylene
  • the film member 140 includes an unstretched polypropylene layer, and is formed to have a size surrounding the connection portion S of the electrode tab 112 and the electrode lead 130, and the electrode tab 112 and the electrode lead ( It is attached to the connection site S of 130, respectively.
  • the film member 140 is composed of two adhesive films for each of the connection portion S of the electrode tab 112 and the electrode lead 130, the two adhesive films are mutually enclosing the connection portion (S) Attached.
  • the film member 140 is formed with an adhesive layer 144 made of an acrylic resin on the unstretched polypropylene layer 142 to improve adhesion.
  • the thickness (W) of the film member 140 has a size of 50 micrometers, the thickness of the unstretched polypropylene layer 142 is 40 micrometers, the thickness of the acrylic adhesive layer 144 is formed to a size of 10 micrometers It is.
  • FIG. 5 and 7 are schematic views showing a structure in which a film member is added to an electrode tab-electrode lead coupling portion according to another embodiment of the present invention.
  • the film member is attached so that the lower end in its longitudinal direction (height direction) surrounds the lower end of the coupling portion of the electrode tab and the electrode lead, and the upper end of the film member in the longitudinal direction (height direction) of the electrode It is formed in a structure located above the upper end of the coupling portion of the tab and the electrode lead.
  • an insulating film 150 disposed between the electrode lead 130 and the sealing portion of the battery cell case is interposed therebetween, and the film member 240 has an insulating film having an upper end in a length direction (height direction). It is formed in the structure attached so that a part of 150 may be enclosed.
  • an insulating film 150 is disposed between the electrode lead 130 and the sealing portion of the battery cell case, and the film member 340 has an insulating film at an upper end in a length direction (height direction). It is formed in a structure attached to contact with the lower end of the (150).
  • an insulating film 150 is disposed between the sealing portions of the battery cell case, and the film member 440 has an upper end in the longitudinal direction (height direction) of the insulating film 150. It is formed in a structure that is attached to surround.
  • a non-stretched polypropylene (CPP) was used as the material of the film member, and the structure of the film member attached to the electrode tab-electrode lead connecting portion S as shown in FIG. 3 (attachment position a), as shown in FIG. Attached structure of the film member to surround the tab-electrode lead connection part S (attachment position b), Attached structure of the film member to surround the electrode tab-electrode lead connection site S as shown in FIG. c) and the structure (attachment position d) of the film member is manufactured to surround the electrode tab-electrode lead connecting portion S, respectively, as shown in FIG. 7, and swelling in insulation resistance, leakage, and high temperature and high humidity environment, respectively. The test was performed.
  • Polyimide (PI) was used as the material of the film member, and the structure of the film member attached to the electrode tab-electrode lead connecting portion S as shown in FIG. 3 (attachment position a), and the electrode tab- as shown in FIG. Attached structure of the film member to surround the electrode lead connection site (S) (attachment position b), Attached structure of the film member to surround the electrode tab-electrode lead connection site (S) as shown in FIG. , And as shown in FIG. 7, the fabricated structure (attachment position d) of the film member was formed to surround the electrode tab-electrode lead connection portion S, respectively, and the insulation resistance, the leakage, and the swelling test in the high temperature and high humidity environment, respectively. Was performed.
  • Biaxially stretched polypropylene was used as the material of the film member, and the structure of the film member attached to surround the electrode tab-electrode lead connection portion S as shown in FIG. 3 (attachment position a), as shown in FIG.
  • the structure of attaching the film member to surround the electrode tab-electrode lead connection site S (attachment position b), the structure of the film member to enclose the electrode tab-electrode lead connection site S as shown in FIG. Position c) and the attached structure (attachment position d) of the film member so as to surround the electrode tab-electrode lead connecting portion S as shown in FIG. 7, respectively, and swell in insulation resistance, leakage, and high temperature and high humidity environment, respectively. Ring test was performed.
  • the structure using the polyimide and biaxially stretched polypropylene as the film member was confirmed to be a risk or a defect as a result of insulation resistance, leakage, and swelling test when the insulation film was partially or completely enclosed.
  • the pouch-type battery cell according to the present invention includes a structure surrounding the film member at the connection portion between the electrode tab and the electrode lead, thereby providing an effect of protecting the connection portion by the film member.
  • the pouch-type battery cell according to the present invention forms the film member with the same material as the material of the heat-sealable first resin layer of the laminate sheet, so that even if interference occurs during thermal fusion of the battery cell case, insulation, leakage, It provides an effect of improving safety by preventing problems such as swelling caused by high temperature.

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

Abstract

La présente invention concerne un élément de batterie de type poche qui est caractérisé en ce que : un ensemble électrode est intégré dans un boîtier d'élément de batterie d'une feuille stratifiée comprenant une couche métallique barrière de matériaux et une première couche de résine thermofusible ; le fil d'électrode est projeté vers l'extérieur du boîtier d'élément de batterie dans un état dans lequel des pattes d'électrode de l'ensemble électrode sont raccordées au fil d'électrode sous la forme d'une borne d'électrode ; la surface circonférentielle externe du boîtier d'élément de batterie est scellée par la fusion thermique de la première couche de résine ; et un élément film du même matériau que celui de la première couche de résine entoure la partie de jonction de la patte d'électrode et du fil d'électrode.
PCT/KR2014/007260 2013-09-24 2014-08-06 Élément de batterie de type poche comprenant un élément film destiné à protéger la jonction entre le fil d'électrode et une patte d'électrode WO2015046744A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201480050254.2A CN105684183B (zh) 2013-09-24 2014-08-06 包括用于保护电极突片-引线接合部的膜件的袋状电池单元
JP2016540791A JP6204598B2 (ja) 2013-09-24 2014-08-06 電極リード−電極タブ結合部保護用フィルム部材を含むパウチ型電池セル

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2013-0113080 2013-09-24
KR1020130113080A KR101666418B1 (ko) 2013-09-24 2013-09-24 전극리드-전극 탭 결합부 보호용 필름부재를 포함하는 파우치형 전지셀

Publications (1)

Publication Number Publication Date
WO2015046744A1 true WO2015046744A1 (fr) 2015-04-02

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PCT/KR2014/007260 WO2015046744A1 (fr) 2013-09-24 2014-08-06 Élément de batterie de type poche comprenant un élément film destiné à protéger la jonction entre le fil d'électrode et une patte d'électrode

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JP (1) JP6204598B2 (fr)
KR (1) KR101666418B1 (fr)
CN (1) CN105684183B (fr)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018526802A (ja) * 2016-04-25 2018-09-13 エルジー・ケム・リミテッド 規格化された構造に基づいて、製造工程性に優れかつ電極リードの絶縁性能が向上した電池セルおよびこれを含む電池パック

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102288097B1 (ko) * 2016-11-07 2021-08-10 주식회사 엘지에너지솔루션 전류 차단 기능의 전극 탭 및 리드를 포함하는 파우치형 전지셀
KR102252335B1 (ko) * 2017-03-10 2021-05-14 주식회사 엘지화학 연장된 보호 필름을 포함하는 파우치형 전지셀
KR102349741B1 (ko) * 2017-05-30 2022-01-11 에스케이온 주식회사 리튬 이차 전지
KR102164254B1 (ko) * 2017-11-15 2020-10-12 주식회사 엘지화학 이차 전지 및 그의 제조 방법, 이차 전지용 파우치 및 그의 제조 방법
KR20190084765A (ko) * 2018-01-09 2019-07-17 주식회사 엘지화학 전극 탭-리드 결합부에 적용된 플라스틱 부재를 포함하는 전극조립체 및 이를 포함하는 이차전지
KR20210101520A (ko) * 2020-02-10 2021-08-19 주식회사 엘지에너지솔루션 접착부 및 스팟 용접으로 결합된 전극리드 결합부를 포함하는 전극조립체 및 이를 포함하는 파우치형 전지셀
JP2023519377A (ja) * 2020-11-06 2023-05-10 エルジー エナジー ソリューション リミテッド 電池セル及びそれを含む電池モジュール
EP4178015A1 (fr) * 2021-01-11 2023-05-10 LG Energy Solution, Ltd. Élément de batterie et module de batterie le comprenant
KR20230038952A (ko) * 2021-09-13 2023-03-21 주식회사 엘지에너지솔루션 전극 리드와 리드필름 사이에 안전 소자를 구비한 파우치형 전지 셀

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080040822A (ko) * 2006-11-06 2008-05-09 주식회사 엘지화학 전극탭-리드 결합부를 강화시킨 이차전지
KR20090017706A (ko) * 2007-08-15 2009-02-19 주식회사 엘지화학 높은 절연성의 리드 필름을 포함하고 있는 전극리드와 이를사용하는 이차전지
KR20110137905A (ko) * 2010-06-18 2011-12-26 주식회사 엘지화학 변형된 구조의 보호테이프를 포함하는 전지셀 및 이를 포함하고 있는 전지모듈
KR20120124613A (ko) * 2011-05-04 2012-11-14 주식회사 엘지화학 안전성이 향상된 이차전지
JP2013164903A (ja) * 2012-02-09 2013-08-22 Hitachi Vehicle Energy Ltd 角形二次電池及びモジュール

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4491843B2 (ja) * 1998-02-24 2010-06-30 ソニー株式会社 リチウムイオン二次電池、およびリチウムイオン二次電池の容器の封じ方法
KR100483994B1 (ko) * 2002-06-12 2005-04-18 주식회사 이글피쳐코캄 리튬 2차 전지용 크루드 셀의 전극탭 처리 방법 및 그에따른 크루드 셀 및 이를 채용한 리튬 2차 전지
JP3931983B2 (ja) * 2003-06-26 2007-06-20 日本電気株式会社 電気リード部の構造、該リード部構造を有する電気デバイス、電池および組電池
JP4434781B2 (ja) * 2004-02-27 2010-03-17 三洋電機株式会社 密閉電池およびその製造方法
JP4711653B2 (ja) * 2004-08-31 2011-06-29 三洋電機株式会社 電池
JP2007115678A (ja) * 2005-09-22 2007-05-10 Sony Corp 非水電解質電池およびその製造方法
JP5280938B2 (ja) * 2009-05-21 2013-09-04 昭和電工パッケージング株式会社 電池端子用被覆材及び被覆した電池用端子

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080040822A (ko) * 2006-11-06 2008-05-09 주식회사 엘지화학 전극탭-리드 결합부를 강화시킨 이차전지
KR20090017706A (ko) * 2007-08-15 2009-02-19 주식회사 엘지화학 높은 절연성의 리드 필름을 포함하고 있는 전극리드와 이를사용하는 이차전지
KR20110137905A (ko) * 2010-06-18 2011-12-26 주식회사 엘지화학 변형된 구조의 보호테이프를 포함하는 전지셀 및 이를 포함하고 있는 전지모듈
KR20120124613A (ko) * 2011-05-04 2012-11-14 주식회사 엘지화학 안전성이 향상된 이차전지
JP2013164903A (ja) * 2012-02-09 2013-08-22 Hitachi Vehicle Energy Ltd 角形二次電池及びモジュール

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018526802A (ja) * 2016-04-25 2018-09-13 エルジー・ケム・リミテッド 規格化された構造に基づいて、製造工程性に優れかつ電極リードの絶縁性能が向上した電池セルおよびこれを含む電池パック

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CN105684183A (zh) 2016-06-15
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CN105684183B (zh) 2018-09-18
JP6204598B2 (ja) 2017-09-27

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