WO2011099793A2 - 파우치형 리튬 2차전지 - Google Patents
파우치형 리튬 2차전지 Download PDFInfo
- Publication number
- WO2011099793A2 WO2011099793A2 PCT/KR2011/000903 KR2011000903W WO2011099793A2 WO 2011099793 A2 WO2011099793 A2 WO 2011099793A2 KR 2011000903 W KR2011000903 W KR 2011000903W WO 2011099793 A2 WO2011099793 A2 WO 2011099793A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin layer
- pouch
- secondary battery
- lithium secondary
- type
- Prior art date
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 32
- 229920005989 resin Polymers 0.000 claims abstract description 75
- 239000011347 resin Substances 0.000 claims abstract description 75
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000005022 packaging material Substances 0.000 claims description 52
- 229910052751 metal Inorganic materials 0.000 claims description 29
- 239000002184 metal Substances 0.000 claims description 29
- -1 polyethylene terephthalate Polymers 0.000 claims description 12
- 230000000712 assembly Effects 0.000 claims description 10
- 238000000429 assembly Methods 0.000 claims description 10
- 239000004840 adhesive resin Substances 0.000 claims description 7
- 229920006223 adhesive resin Polymers 0.000 claims description 7
- 238000004806 packaging method and process Methods 0.000 claims description 7
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 6
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 6
- 229920005749 polyurethane resin Polymers 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229920005672 polyolefin resin Polymers 0.000 claims description 5
- 239000004677 Nylon Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 3
- 239000009719 polyimide resin Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 95
- 210000004027 cell Anatomy 0.000 description 40
- 239000007789 gas Substances 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 12
- 239000010408 film Substances 0.000 description 11
- 238000007789 sealing Methods 0.000 description 10
- 239000003792 electrolyte Substances 0.000 description 9
- 238000009413 insulation Methods 0.000 description 8
- 230000004888 barrier function Effects 0.000 description 7
- 238000003860 storage Methods 0.000 description 7
- 239000010409 thin film Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 239000002952 polymeric resin Substances 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 239000013589 supplement Substances 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920006284 nylon film Polymers 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
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- 230000017525 heat dissipation Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000005001 laminate film Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
Images
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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
-
- 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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M50/124—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
- H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
- H01M50/133—Thickness
-
- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/222—Inorganic material
- H01M50/224—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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
-
- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/258—Modular batteries; Casings provided with means for assembling
- H01M50/26—Assemblies sealed to each other in a non-detachable manner
-
- 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
-
- 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 lithium secondary battery in which unit cells are packaged in a battery module form through a separate metal outer case.
- the electrode assembly packaging material of the pouch-type lithium secondary battery has a heat adhesiveness and has a multilayer film form of an inner resin layer that serves as a sealing layer, a metal thin film layer that serves as a barrier, and an outer resin layer that serves to protect the battery from the outside. consist of.
- the metal thin layer is used to prevent the inflow of air, moisture, etc. into the battery and to block the outflow of the gas generated inside the battery, and mainly aluminum (Al) is used.
- the pouch packaging material having such a structure may occur when the metal thin film layer is exposed to the outside or the exposed metal thin film layer is electrically connected to an electrode lead (electrode terminal) or the like during the manufacturing of the battery or the use of the battery.
- an electrode lead electrode terminal
- the pouch packaging material having such a structure may occur when the metal thin film layer is exposed to the outside or the exposed metal thin film layer is electrically connected to an electrode lead (electrode terminal) or the like during the manufacturing of the battery or the use of the battery.
- an electrode lead electrode terminal
- the pouch packaging material having such a structure may occur when the metal thin film layer is exposed to the outside or the exposed metal thin film layer is electrically connected to an electrode lead (electrode terminal) or the like during the manufacturing of the battery or the use of the battery.
- excessive strain is applied locally or excessive heat fusion is performed in a groove forming process for accommodating an electrode assembly and an electrolyte in a pouch packaging material or a heat fusion process for forming a sealing portion of an outer circum
- the metal thin film layer of the pouch during groove forming (deep drawing) for accommodating the electrode assembly and the electrolyte has difficulty in accommodating an electrode assembly having a predetermined thickness or more because of its low ductility and low moldability compared to the resin layer.
- Japanese Patent Application Laid-Open No. 2007-265989 discloses a battery element packaging material comprising a laminate film having a structure in which two or more resin film layers are laminated, wherein the laminated structure does not have a metal foil and at least one layer of the Disclosed is a battery device packaging material in which a resin film layer includes a moisture absorbent.
- battery element exterior materials are suitable for small batteries, and each battery element must be packaged with an exterior material including a moisture absorbent in order to be used in a medium-large battery. Therefore, manufacturing costs are high as in the case of a conventional high-cost metal thin film layer. There is a problem that it is difficult to secure the internal gas blocking caused by the abnormal chemical reaction of the battery element.
- Korean Patent Application Publication No. 10-2009-0105496 discloses an outer coating layer based on excellent tensile strength and weather resistance polymer resin, a functional blocking layer based on polymer resin capable of blocking water and gas, and heat sealability.
- a laminate sheet comprising an inner sealant layer based on a polymer resin is disclosed.
- each unit cell is typically It is packed again as a supplement.
- the weight of the entire battery module is increased by the metal layer included in the pouch case and the above-described separate metal type supplement.
- An object of the present invention is to simultaneously solve the above-mentioned problems of the prior art.
- Pouch type lithium secondary battery has been developed, and in this case, it is possible to secure moisture and gas barrier properties as well as insulation characteristics, initial performance, moldability, charge and discharge characteristics, and high temperature storage characteristics, and at the same time light, It was confirmed that the manufacturing process can provide a simple, inexpensive pouch-type lithium secondary battery.
- the present invention is a pouch-type lithium secondary battery composed of a medium-large battery module, jelly-roll type electrode assembly; Resin-type first packaging material for packaging each of the jelly-roll type electrode assembly in the form of a unit cell, formed of a two-layer structure of the inner resin layer and the outer resin layer; And storing two or more unit cells, each packed with the first packaging material, in a modular form at once, and including a metal-type second packaging material that blocks water and gas by a sealed structure.
- the inner resin layer may be at least one or more materials selected from polyolefin resin, polyurethane resin, and polyimide resin, may be formed of two or more layers, the thickness may be 20 to 100 ⁇ m. .
- the outer resin layer may be made of nylon or polyethylene terephthalate (PET), may be formed of two or more layers, and may have a thickness of 20 to 100 ⁇ m.
- PET polyethylene terephthalate
- the second packaging material may be made of aluminum or stainless steel.
- an adhesive resin layer may be further included between the inner resin layer and the outer resin layer, and the adhesive resin layer may be at least one material selected from polyolefin resin or polyurethane resin.
- the present invention may have a structure in which two or more inner resin layers and an outer resin layer are laminated.
- the present invention consists of a two-layer structure of the inner resin layer and the outer resin layer in the pouch packaging material, the exposure of the metal layer due to pinholes and cracks of the inner resin layer is prevented at the source, excellent insulation properties, improved molding during groove molding Securing the property, there is an advantage to lower the adhesive layer peeling due to the side reaction of the metal thin film layer and the electrolyte.
- the electrode assemblies wrapped with the pouch packaging material has the advantage of maintaining moisture and gas barrier properties by packaging in a modular form by a separate metal outer case.
- FIG. 1 shows a pouch-type lithium secondary battery according to the present invention, a resin-type first packaging material, a metal-type second packaging material and a plurality of unit cells It illustrates a battery module (single cup) electrically connected.
- Figure 2 shows a pouch-type lithium secondary battery according to the present invention is a resin-type first packaging material, a metal-type second packaging material and a plurality of unit cells
- the battery module double cup
- Figure 3 shows a pouch-type lithium secondary battery according to the present invention is a resin-type first packaging material, a metal-type second packaging material and a plurality of unit cells
- the battery module (single cup and double cup mixed) is electrically connected.
- FIG. 4 illustrates a structure in which an electrode lead of a battery cell (applied to a double cup) is disposed on a bottom surface of a battery.
- FIG. 5 illustrates a structure in which two electrode leads of a battery cell (double cup application) are positioned in a scene of a battery.
- FIG. 6 illustrates a structure in which one electrode lead of a battery cell (applied to a double cup) is disposed on each of a right side and a left side of the battery.
- FIG. 7 illustrates a structure in which one electrode lead of a battery cell (applied to a double cup) is disposed on each of the top and bottom surfaces of the battery.
- FIG. 8 illustrates a pouch-type lithium secondary battery according to the present invention, and illustrates a structure in which a plurality of unit cells are completely sealed by a metal-type second packaging material (single cup and double cup mixed).
- FIG. 1 illustrates a pouch-type lithium secondary battery according to the present invention, a resin-type first packaging material, a metal-type second packaging material, and a battery module in which a plurality of unit cells are electrically connected
- FIG. 8 is a pouch according to the present invention. It shows a type lithium secondary battery and shows a structure in which a plurality of unit cells are completely sealed by a metal type second packaging material.
- the pouch-type lithium secondary battery 100 has a module 10 form for a medium-large battery, and has a jelly-roll electrode assembly (not shown), a resin-type first packaging material 30, and a metal. It includes a mold-type second packaging material (40).
- the jelly-roll type electrode assembly is a rolled type electrode assembly including an anode, a separator, and a cathode as one type of electrode assembly.
- the jelly-roll type electrode assembly in the present invention includes all types of jelly-roll type electrode assemblies commonly used in lithium secondary batteries, and is not limited to a particular type.
- the resin-type first packaging material 30 is a package of the jelly-roll type electrode assembly in the form of a unit cell 20, and is formed in a two-layer structure of the inner resin layer 30a and the outer resin layer 30b.
- the inner resin layer 30a serves as a seal having heat adhesiveness, and is thermally fused to each other by heat and pressure applied in a state in which the electrode assembly is embedded to seal the pouch.
- the material one or more selected from polyolefin resins such as polyethylene, polyethylene acrylic acid, polypropylene, polybutylene, etc., which have excellent chemical resistance and good sealing properties, polyurethane resins, and polyimide resins can be used.
- polyurethane resins polyurethane resins
- polyimide resins polyimide resins
- CPP non-stretched polypropylene having both electrolyte resistance and heat sealability is used.
- the inner resin layer 30a may be formed in one layer or two or more layers in order to effectively prevent penetration of the electrolyte, and the thickness may be in the range of 20 to 100 ⁇ m. If the thickness is too thin, less than 20 ⁇ m, the electrolyte blocking function and the strength of the film is reduced, if the thickness is too thick exceeding 100 ⁇ m, workability is poor, and inconvenience caused by increasing the thickness of the entire first packaging material 30 .
- the outer resin layer 30b serves to protect the electrode assembly such as a jelly-roll type electrode assembly and to secure heat resistance and chemical resistance, and typically uses a heat resistant polymer having excellent tensile strength, moisture permeability, and air permeability.
- the outer resin layer 30b may be formed in a single layer or a multilayer of two or more layers.
- the outer resin layer preferably uses nylon (for example stretched nylon, ONy) or polyethylene terephthalate (PET) which has the above properties as its material and which is advantageous in terms of cost.
- the thickness of the outer resin layer 30b is preferably in the range of 20 to 100 ⁇ m.
- the inner resin layer and the outer resin layer may be stacked regardless of the number and order of the inner resin layer and the outer resin layer when the inner resin layer and the outer resin layer are stacked.
- the resin layer, the outer resin layer, the inner resin layer, and the outer resin layer may be laminated, but the above examples are not limited to the configuration of the present invention.
- the internal and external meanings in the structure in which the inner resin layer and the outer resin layer may be alternately stacked as described above are divided for convenience based on the configuration of the resin layer in order to assist the understanding of the present invention and are not limited thereto. .
- the first packaging material 30 in the present invention may further include an adhesive resin layer between the inner resin layer 30a and the outer resin layer 30b as necessary.
- Adhesive resin layer is for the smooth adhesion of the inner resin layer (30a) and the outer resin layer (30b)
- the material may be a conventional polyolefin-based adhesive resin, or a urethane or polyurethane resin can be used for smooth processing. These can also be mixed and used.
- the resin type first packaging material 30 may be manufactured in various ways.
- the inner resin layer 30a film and the outer resin layer 30b film may be sequentially laminated and then bonded to each other by a dry lamination or extrusion lamination method.
- the receiving part is formed on one side of the first packaging material 30 manufactured as described above so that the jelly-roll type electrode assembly, which is an electrode assembly, may be seated through deep drawing, and after storing the electrode assembly, the other side may be bent in the form of a cover, and then the outer circumferential surface thereof.
- the three surfaces are sealed by heat fusion to prepare a pouch-type unit cell 20 in which individual jelly-roll type electrode assemblies are packaged by the first packaging material 30, respectively. Meanwhile, after manufacturing two sheets of first packaging material 30, an accommodating part is formed in one of them, the electrode assembly is accommodated, and the outer surface of the pouch-type unit cell 20 is sealed by covering the remaining first packaging material 30 and sealing four surfaces. It can also manufacture.
- the metal type second packaging material 40 is packaged and accommodated in two or more unit cells 20 each packed with the resin type first packing material 30 in the form of a module 10.
- a packaging material made of only a metal material it serves to protect the inside of the battery from external shock as well as blocking water and gas by a completely sealed structure.
- a plurality of unit cells 20 that are already packaged using a separate metal outer case are packed in the form of a module 10 at a time. It is characterized by sealing.
- the second packaging material 40 metal materials commonly known in the art as being resistant to moisture and gas and resistant to external shocks are used.
- metal materials commonly known in the art as being resistant to moisture and gas and resistant to external shocks are used.
- SUS stainless steel
- the electrode leads 50 of the plurality of unit cells 20 are electrically connected to each other using the connection member 60 such as a bus bar, and then housed in the second packaging material 40 at a time.
- the electrode leads 50 of the unit cells 20 are finally drawn out of the second packaging material 40 through a connection member 60 such as a bus bar through an external connection connection member (not shown). And electrically connected to an external input / output terminal (not shown).
- the pouch-type lithium secondary battery 100 is manufactured by completely sealing all the openings on the second packaging material 40 in which the plurality of unit cells 20 are accommodated by welding or the like.
- the battery is preferably manufactured in a dry room.
- the pouch type secondary battery of the present invention can be applied to a case where the size of the positive electrode and negative electrode tabs is different or the distance between the positive electrode tab and the negative electrode tab is different.
- the pouch-type secondary battery of the present invention can implement the positive lead or the negative lead in any direction of the long side, short side of the cell as shown in Figure 1 below as well as Figures 2 to 4 below, one of the positive lead and the negative lead It can be implemented in different directions as well as in a direction.
- the pouch-type secondary battery of the present invention may be configured as a single cup, as shown in Figure 1, may also be configured as a double cup, as shown in Figure 2, may be mixed with a single cup and a double cup as shown in Figures 3 and 8.
- the outermost part of the battery may be configured in various forms such as a single cup or a double cup when mixed.
- the single cup and the double cup are expressions referring to the exterior form of the pouch, and according to the shape of the cross-section of the pouch by the electrode assembly embedded in the pouch, the single cup is usually in a state where only one side of the pouch is convex, and the double cup is both sides. All of them refer to a convex state.
- one side of the rectangular pouch is folded.
- the sealing assembly or the folded side of the folded side is separated from the outermost side of the pouch by the other three sides.
- the other three sides When compared with the other three sides may be the same, or may be configured shorter than the other three sides.
- the expressions of the single cup and the double cup as described above are intended to help the understanding of the cell structure of the present invention and are not limited to the term throughout this specification.
- Figure 4-7 is shown as a double cup by way of example, a single cup may have the configuration of a tab likewise, it is not limited to this throughout the specification.
- the electrode assembly may be used in the form of a commonly used electrode assembly such as winding-type, stack-type, stack-fold type electrode assembly as well as jelly-roll type.
- the stack-folding type stacks electrode assemblies of the same type (anode-membrane-cathode) around the separator film, or different types of electrode assemblies (anode-separator-anode, cathode-separator-cathode) of the separator.
- the stack-folding type can also include a variety of stack-folding type, such as folded on the same side or each other.
- a resin-type first packaging material 30 was manufactured, and then deep drawing on one side thereof.
- the receiving portion was formed and the other side was bent in the form of a lid.
- a metal-type second packaging material 40 of 0.5 mm in thickness was manufactured.
- the electrode leads 50 of the two unit cells 20 are electrically connected by using the bus bar 60 and then housed in the second packaging material 40 at once, and the bus bar 60 is Finally, an external connection terminal (not shown) is used to finally connect with an external input / output terminal (not shown).
- the pouch-type lithium secondary battery 100 was manufactured by welding all the openings on the second packaging material 40 containing the two unit cells 20 to form a complete seal.
- Example 2 It is the same as Example 1 except the modified polypropylene film of thickness 50micrometer was used for the internal resin layer 30a.
- two unit cells were prepared by accommodating two same jelly-roll electrode assemblies as in Example 1 in the pouch sheathing material, injecting 1M LiPF 6 carbonate-based electrolyte, and thermally sealing the outer circumferential surface of the pouch sheathing material.
- the metal type supplement was padded on each of the two unit cell surfaces, and the sealing was not formed.
- the two unit cells are accommodated in a 0.5 mm thick battery pack enclosure made of polypropylene, and then the bus bars are externally connected.
- the pouch-type lithium secondary battery was manufactured by electrically connecting to an external input / output terminal through a connecting member.
- the insulation characteristics, the initial capacity, the initial output, and the like of the unit cell manufactured by one jelly-roll type electrode assembly housed in a first packaging material (or pouch exterior material) and heat-sealed were evaluated. Is shown in Table 1.
- Insulation characteristics were performed by checking whether the metal layer and the resin layer exposed to the edges of the pouch and the cathode were energized.
- Initial capacity was performed by measuring the discharge capacity after the charge / discharge at a rate of 1C for the prepared unit cell.
- the initial output was measured based on this by discharging for 10 seconds with a current of 120A after charging half of the manufactured unit cell capacity.
- Example 1 30 . 222 ⁇ 0.2 5.1 ⁇ 0.1 700 ⁇ 20
- Example 2 30 . 225 ⁇ 0.2 5.1 ⁇ 0.1 700 ⁇ 20
- Comparative example 30 5 234 ⁇ 0.2 5.1 ⁇ 0.1 700 ⁇ 20
- Charging and discharging was performed by repeating the charging / discharging process 200 times at a rate of 1 C of the secondary battery capacity at room temperature and then checking the capacity and output.
- the high temperature storage characteristics were performed by checking the capacity and output after storage for 4 weeks in a chamber at 60 °C.
- the pouch-type secondary battery of the present invention includes an electric vehicle including a power tool, an electric vehicle (EV), a hybrid electric vehicle (HEV), and a plug-in hybrid electric vehicle (PHEV). ; Electric two-wheeled vehicles including E-bikes and E-scooters; It can be applied to electric golf cart, energy storage system medium and large size batteries.
- EV electric vehicle
- HEV hybrid electric vehicle
- PHEV plug-in hybrid electric vehicle
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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)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
Description
구분 | 제조된 전지 수(ea) | 절연 불량전지 수(ea) | 전지 무게(g) | 초기 용량(Ah) | 초기 출력(W) |
실시예 1 | 30 | . | 222±0.2 | 5.1±0.1 | 700±20 |
실시예 2 | 30 | . | 225±0.2 | 5.1±0.1 | 700±20 |
비교예 | 30 | 5 | 234±0.2 | 5.1±0.1 | 700±20 |
구분 | 200회 충방전 후 용량(Ah) | 200회 충방전 후 출력(W) | 고온저장 후 용량(Ah) | 고온저장 후 출력(W) |
실시예 1 | 4.9±0.1 | 630±20 | 4.5±0.1 | 600±20 |
실시예 2 | 4.9±0.1 | 650±20 | 4.5±0.1 | 600±20 |
비교예 | 4.6±0.1 | 600±20 | 4.3±0.1 | 550±20 |
Claims (10)
- 중대형용 전지 모듈로 구성된 파우치형 리튬 2차전지에 있어서,젤리-롤형 전극조립체;상기 젤리-롤형 전극조립체를 단위셀 형태로 각각 포장하는 것으로서, 내부수지층 및 외부수지층의 2층 구조로 형성된 수지형 제1포장재; 및상기 제1포장재로 각각 포장된 단위셀 2개 이상을 모듈형태로 한꺼번에 포장하여 수납하는 금속형 제2포장재를 포함하는 파우치형 리튬 2차전지.
- 제1항에 있어서, 상기 내부수지층은 폴리올레핀수지, 폴리우레탄수지, 및 폴리이미드수지 중에서 선택되는 적어도 1종 이상의 재질인 것을 특징으로 하는 파우치형 리튬 2차전지.
- 제1항에 있어서, 상기 내부수지층은 1층 또는 2이상의 다층으로 형성된 것을 특징으로 하는 파우치형 리튬 2차전지.
- 제1항에 있어서, 상기 내부수지층의 두께는 20 내지 100㎛인 것을 특징으로 하는 파우치형 리튬 2차전지.
- 제1항에 있어서, 상기 외부수지층은 1층 또는 2이상의 다층으로 형성된 것을 특징으로 하는 파우치형 리튬 2차전지.
- 제1항에 있어서, 상기 외부수지층은 나일론 또는 폴리에틸렌테레프탈레이트(PET)의 재질인 것을 특징으로 하는 파우치형 리튬 2차전지.
- 제1항에 있어서, 상기 외부수지층의 두께는 20 내지 100㎛인 것을 특징으로 하는 파우치형 리튬 2차전지.
- 제1항에 있어서, 상기 금속형 제2포장재는 알루미늄 또는 스테인레스강 재질인 것을 특징으로 하는 파우치형 리튬 2차전지.
- 제1항에 있어서, 상기 내부수지층 및 외부수지층 사이에 접착수지층을 더 포함하는 것을 특징으로 하는 파우치형 리튬 2차전지.
- 제9항에 있어서, 상기 접착수지층은 폴리올레핀수지 또는 폴리우레탄수지 중에서 선택되는 적어도 1종 이상의 재질인 것을 특징으로 하는 파우치형 리튬 2차전지.
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CN2011800025997A CN102473880A (zh) | 2010-02-10 | 2011-02-10 | 袋型锂二次电池 |
EP11742485.3A EP2434564B1 (en) | 2010-02-10 | 2011-02-10 | Rechargeable lithium battery in pouch form |
JP2012511773A JP5850830B2 (ja) | 2010-02-10 | 2011-02-10 | パウチ型リチウム二次電池 |
US13/259,927 US9537173B2 (en) | 2010-02-10 | 2011-02-10 | Pouch type lithium secondary battery |
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KR10-2010-0012290 | 2010-02-10 | ||
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EP (1) | EP2434564B1 (ko) |
JP (2) | JP5850830B2 (ko) |
KR (1) | KR101089168B1 (ko) |
CN (1) | CN102473880A (ko) |
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- 2011-02-10 US US13/259,927 patent/US9537173B2/en active Active
- 2011-02-10 KR KR1020110011984A patent/KR101089168B1/ko active IP Right Grant
- 2011-02-10 CN CN2011800025997A patent/CN102473880A/zh active Pending
- 2011-02-10 EP EP11742485.3A patent/EP2434564B1/en active Active
- 2011-02-10 JP JP2012511773A patent/JP5850830B2/ja active Active
- 2011-02-10 WO PCT/KR2011/000903 patent/WO2011099793A2/ko active Application Filing
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2014
- 2014-04-10 JP JP2014081325A patent/JP2014146613A/ja active Pending
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KR20090105496A (ko) | 2008-04-02 | 2009-10-07 | 주식회사 엘지화학 | 전지케이스용 라미네이트 시트 및 이를 포함하고 있는 리튬이차전지 |
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Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
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US10566603B2 (en) | 2011-09-07 | 2020-02-18 | 24M Technologies, Inc. | Stationary semi-solid battery module and method of manufacture |
US11888144B2 (en) | 2011-09-07 | 2024-01-30 | 24M Technologies, Inc. | Stationary semi-solid battery module and method of manufacture |
US11309531B2 (en) | 2011-09-07 | 2022-04-19 | 24M Technologies, Inc. | Stationary semi-solid battery module and method of manufacture |
JP2013069558A (ja) * | 2011-09-22 | 2013-04-18 | Toyota Motor Corp | 電池モジュール |
JP2018139219A (ja) * | 2012-05-18 | 2018-09-06 | 24エム・テクノロジーズ・インコーポレイテッド24M Technologies, Inc. | 電気化学セル及びその製造方法 |
US10566581B2 (en) | 2012-05-18 | 2020-02-18 | 24M Technologies, Inc. | Electrochemical cells and methods of manufacturing the same |
US12068445B2 (en) | 2012-05-18 | 2024-08-20 | 24M Technologies, Inc. | Electrochemical cells and methods of manufacturing the same |
US11646437B2 (en) | 2012-05-18 | 2023-05-09 | 24M Technologies, Inc. | Electrochemical cells and methods of manufacturing the same |
US11121437B2 (en) | 2012-05-18 | 2021-09-14 | 24M Technologies, Inc. | Electrochemical cells and methods of manufacturing the same |
US11611061B2 (en) | 2014-11-05 | 2023-03-21 | 24M Technologies, Inc. | Electrochemical cells having semi-solid electrodes and methods of manufacturing the same |
US10886521B2 (en) | 2014-11-05 | 2021-01-05 | 24M Technologies, Inc. | Electrochemical cells having semi-solid electrodes and methods of manufacturing the same |
US10637038B2 (en) | 2014-11-05 | 2020-04-28 | 24M Technologies, Inc. | Electrochemical cells having semi-solid electrodes and methods of manufacturing the same |
US11024903B2 (en) | 2015-06-18 | 2021-06-01 | 24M Technologies, Inc. | Single pouch battery cells and methods of manufacture |
US11831026B2 (en) | 2015-06-18 | 2023-11-28 | 24M Technologies, Inc. | Single pouch battery cells and methods of manufacture |
US11742525B2 (en) | 2020-02-07 | 2023-08-29 | 24M Technologies, Inc. | Divided energy electrochemical cell systems and methods of producing the same |
Also Published As
Publication number | Publication date |
---|---|
JP2012527725A (ja) | 2012-11-08 |
WO2011099793A3 (ko) | 2011-11-24 |
US9537173B2 (en) | 2017-01-03 |
JP5850830B2 (ja) | 2016-02-03 |
KR20110093703A (ko) | 2011-08-18 |
CN102473880A (zh) | 2012-05-23 |
EP2434564B1 (en) | 2015-05-20 |
EP2434564A2 (en) | 2012-03-28 |
EP2434564A4 (en) | 2013-11-20 |
JP2014146613A (ja) | 2014-08-14 |
US20120015226A1 (en) | 2012-01-19 |
KR101089168B1 (ko) | 2011-12-02 |
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