WO2022250307A1 - 단위 셀 및 이를 포함하는 전지 셀 - Google Patents
단위 셀 및 이를 포함하는 전지 셀 Download PDFInfo
- Publication number
- WO2022250307A1 WO2022250307A1 PCT/KR2022/006015 KR2022006015W WO2022250307A1 WO 2022250307 A1 WO2022250307 A1 WO 2022250307A1 KR 2022006015 W KR2022006015 W KR 2022006015W WO 2022250307 A1 WO2022250307 A1 WO 2022250307A1
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- WO
- WIPO (PCT)
- Prior art keywords
- adhesive
- electrode
- based material
- separator
- paragraph
- Prior art date
Links
- 239000000853 adhesive Substances 0.000 claims abstract description 310
- 230000001070 adhesive effect Effects 0.000 claims abstract description 309
- 239000000203 mixture Substances 0.000 claims abstract description 131
- 239000006185 dispersion Substances 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims description 134
- 239000008151 electrolyte solution Substances 0.000 claims description 54
- 239000003792 electrolyte Substances 0.000 claims description 41
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 32
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 21
- 229920001971 elastomer Polymers 0.000 claims description 20
- 239000004593 Epoxy Substances 0.000 claims description 19
- 229920002647 polyamide Polymers 0.000 claims description 19
- 239000004814 polyurethane Substances 0.000 claims description 19
- 229920002635 polyurethane Polymers 0.000 claims description 19
- 229920000098 polyolefin Polymers 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 239000011244 liquid electrolyte Substances 0.000 claims description 10
- 239000005518 polymer electrolyte Substances 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 3
- 229920005700 acResin® Polymers 0.000 description 37
- 230000000052 comparative effect Effects 0.000 description 26
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 23
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 23
- 239000011230 binding agent Substances 0.000 description 10
- 239000010410 layer Substances 0.000 description 10
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 5
- 239000005977 Ethylene Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000011247 coating layer Substances 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000004952 Polyamide Substances 0.000 description 4
- 239000011149 active material Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 239000006182 cathode active material Substances 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 238000003475 lamination Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 239000007773 negative electrode material Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 229910013870 LiPF 6 Inorganic materials 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 3
- 239000006183 anode active material Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004502 linear sweep voltammetry Methods 0.000 description 3
- 229910003002 lithium salt Inorganic materials 0.000 description 3
- 159000000002 lithium salts Chemical class 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229920006254 polymer film Polymers 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 102000004310 Ion Channels Human genes 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910011322 LiNi0.6Mn0.2Co0.2O2 Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- NXPZICSHDHGMGT-UHFFFAOYSA-N [Co].[Mn].[Li] Chemical compound [Co].[Mn].[Li] NXPZICSHDHGMGT-UHFFFAOYSA-N 0.000 description 1
- KLARSDUHONHPRF-UHFFFAOYSA-N [Li].[Mn] Chemical compound [Li].[Mn] KLARSDUHONHPRF-UHFFFAOYSA-N 0.000 description 1
- SOXUFMZTHZXOGC-UHFFFAOYSA-N [Li].[Mn].[Co].[Ni] Chemical compound [Li].[Mn].[Co].[Ni] SOXUFMZTHZXOGC-UHFFFAOYSA-N 0.000 description 1
- ZYXUQEDFWHDILZ-UHFFFAOYSA-N [Ni].[Mn].[Li] Chemical compound [Ni].[Mn].[Li] ZYXUQEDFWHDILZ-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- CKFRRHLHAJZIIN-UHFFFAOYSA-N cobalt lithium Chemical compound [Li].[Co] CKFRRHLHAJZIIN-UHFFFAOYSA-N 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910000398 iron phosphate Inorganic materials 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229920001384 propylene homopolymer Polymers 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Images
Classifications
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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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
- H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
-
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
- H01M50/461—Separators, membranes or diaphragms characterised by their combination with electrodes with adhesive layers between electrodes and separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- 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
- these secondary batteries are classified into cylindrical batteries and prismatic batteries in which the electrode assembly is embedded in a cylindrical or prismatic metal can, and pouch-type batteries in which the electrode assembly is embedded in a pouch-type case made of an aluminum laminate sheet.
- the electrode assembly embedded in the battery case is a power generating device capable of charging and discharging, consisting of a positive electrode, a negative electrode, and a separator structure interposed between the positive electrode and the negative electrode. It is classified into a jelly-roll type wound with a separator interposed and a stack type in which a plurality of positive and negative electrodes are sequentially stacked in a state in which a separator is interposed.
- the separator may include a lower separator and an upper separator
- the electrode may include a first electrode and a second electrode
- the lower separator, the first electrode, the upper separator, and the second electrode may be stacked in order. have.
- the plurality of dots may be spaced apart from each other.
- An electrode assembly according to another embodiment of the present invention is formed by alternately stacking the unit cells, and the first adhesive part includes an adhesive pattern disposed at the same position between the electrode and the separator.
- a battery cell according to another embodiment of the present invention includes an electrolyte solution together with an electrode assembly in which the unit cells are alternately stacked.
- the first adhesive part may be dissolved in the electrolyte solution.
- the first adhesive composition is made of at least one of an ethylene-vinyl acetate (EVA, Ethylene vinyl acetate)-based material, an acrylic-based material, and an epoxy-based material
- the second adhesive composition is ethylene-vinyl acetate (EVA, Ethylene vinyl acetate) It may be made of at least one of a material based material, an acrylic material, an epoxy material, a polyolefin material, a rubber material, a polyamide material, and a polyurethane material.
- the content of the first adhesive composition and the second adhesive composition may be 0.8wt% or more and 1.2wt% or less relative to the content of the electrolyte solution.
- the content of the second adhesive composition may be 0.1wt% or more and 0.2wt% or less relative to the content of the electrolyte solution.
- the electrolyte solution may include at least one of an organic liquid electrolyte, an inorganic liquid electrolyte, a solid polymer electrolyte, a gel polymer electrolyte, a solid inorganic electrolyte, and a molten inorganic electrolyte.
- the battery cell may have a zigzag shape by folding the separator.
- a degree of dispersion of the first adhesive in the electrolyte may be greater than a degree of dispersion of the second adhesive in the electrolyte.
- the electrolyte solution may include at least one of an organic liquid electrolyte, an inorganic liquid electrolyte, a solid polymer electrolyte, a gel polymer electrolyte, a solid inorganic electrolyte, and a molten inorganic electrolyte.
- the total content of the first adhesive may be 0.6wt% or more and 0.9wt% or less based on the total content of the electrolyte solution.
- the total content of the second adhesive in the battery case may be 0.1wt% or more and 0.2wt% or less relative to the total content of the electrolyte in the battery case.
- the unit cell and the battery cell including the same of the present invention, instead of the conventional lamination using heat and pressure, use an adhesive composition to bond the electrode and the separator and the separator and the separator, so that the electrode and the separator are bonded. Movement is prevented, and deformation and damage of electrodes and separators can be prevented.
- FIG. 3 is a cross-sectional view taken along the A-A axis of FIG. 2;
- FIG. 4 is a top view of a battery cell according to another embodiment of the present invention.
- Figure 5 is a view showing the results of the dispersion according to the content of the adhesive composition included in the unit cell of Figure 2.
- FIG. 7 is a cross-sectional view showing an electrode assembly according to another embodiment of the present invention.
- a unit cell includes separators 210 and 250 and electrodes 110 and 150 alternately stacked by a predetermined number; A first adhesive portion 310 disposed between the separators 210 and 250 and the electrodes 110 and 150 and made of a first adhesive composition; and a second adhesive portion 350 disposed between the separators 210 and 250 and the other separators 210 and 250 and made of a second adhesive composition.
- the separators 210 and 250 include a lower separator 210 and an upper separator 250
- the electrodes 110 and 150 include a first electrode 110 and a second electrode 150
- the lower separator 210 , the first electrode 110 , the upper separator 250 , and the second electrode 150 may be sequentially stacked.
- the cathode active material for example, lithium-cobalt-based oxide, lithium-manganese-based oxide, lithium-nickel-manganese-based oxide, lithium-manganese-cobalt-based oxide, lithium-nickel-manganese-cobalt-based oxide, and lithium It may be selected from the group consisting of iron phosphate, a combination thereof, or a complex oxide thereof.
- the anode current collector or the cathode current collector is not particularly limited as long as it does not cause chemical change in the battery and has high conductivity.
- copper, stainless steel, aluminum, nickel, titanium, fired carbon or aluminum A stainless steel surface treated with carbon, nickel, titanium, silver, or the like may be used.
- the first adhesive part 310 may fix the first electrode 110 and the second electrode 150 to the lower separator 210 and/or the upper separator 250, respectively. That is, the first adhesive part 310 can prevent movement between the electrodes 110 and 150 and the separators 210 and 250, and prevent deformation and breakage of the electrodes 110 and 150 and the separators 210 and 250. can do.
- the second adhesive portion 350 may be positioned between the upper separator 250 and the lower separator 210 . More specifically, the second adhesive portion 350 may be positioned between an end of the lower separator 210 and an end of the first electrode 110 . In addition, the second adhesive portion 350 may be positioned between an end of the upper separator 250 and an end of the first electrode 110 . In other words, the second adhesive portion 350 is located on the surface of the separators 210 and 250 that the first electrode 110 does not contact, but the second adhesive portion 350 is located along the circumference of the first electrode 110. can do.
- the second adhesive portion 350 may also be selectively positioned on a portion where the electrode tabs 115 and 155 protruding from the electrodes 110 and 150 are located.
- the first adhesive portion 310 may be made of the first adhesive composition
- the second adhesive portion 350 may be made of the second adhesive composition. More specifically, the first adhesive portion 310 may hinder the passage of lithium ions between the electrodes 110 and 150 and the separators 210 and 250 . That is, it may be preferable that the first adhesive part 310 is made of a material having a relatively high dispersibility or high solubility in an electrolyte solution.
- the degree of dispersion of the first adhesive composition included in the first adhesive portion 310 may be equal to or greater than the degree of dispersion of the second adhesive composition included in the second adhesive portion 350 .
- a separator according to an embodiment described herein may be a Ceramic Coated Separator (CCS).
- CCS Ceramic Coated Separator
- the separator has a raw film and a coating layer formed on at least one surface of the raw film, and the coating layer may include alumina powder and a binder to aggregate them.
- SRS Safety Reinforced Separator
- a large amount of binder is coated on the surface of the coating layer, but in CCS, the binder may not be coated on the surface of the coating layer, or the binder content distributed on the surface may be very low compared to SRS.
- the content of the binder coated on the surface of the coating layer of the separator may be about 3 wt% or less.
- a battery cell 1000 includes an electrolyte solution together with an electrode assembly 1100 in which the above-described unit cells 100 are alternately stacked.
- the first electrode tabs 1150 in which the first electrode tabs 115 of the unit cell 100 are stacked and the second electrode tabs 1550 in which the second electrode tabs 155 are stacked are respectively electrodes. It may be electrically connected to the lead 3000 .
- a lead film 4000 may be positioned above and/or below the electrode lead 3000 .
- the first adhesive part 310 may be dissolved in the electrolyte solution. More specifically, the first adhesive composition included in the first adhesive portion 310 may be dissolved in the electrolyte solution. More preferably, all of the first adhesive composition included in the first adhesive portion 310 may be dissolved in the electrolyte solution.
- the first adhesive portion 310 is dissolved in the electrolyte solution, so that the lithium ion passage between the electrodes 110 and 150 and the separators 210 and 250 may not be hindered, and the battery cell Battery performance can be improved.
- the content of the first adhesive composition and the second adhesive composition may be 0.8wt% or more and 1.2wt% or less relative to the content of the electrolyte solution. More specifically, the content of the first adhesive composition and the second adhesive composition may be 0.85wt% or more and 1.15wt% or less relative to the content of the electrolyte solution. The content of the first adhesive composition and the second adhesive composition may be 0.9wt% or more and 1.1wt% or less relative to the content of the electrolyte solution.
- the first adhesive composition and the second adhesive composition are included in a ratio within the above-described range, so that between the electrodes 110 and 150 and the separators 210 and 250
- the first adhesive portion 310 located on the can be easily dispersed and dissolved in the electrolyte, and thus the lithium ion passage between the electrodes 110 and 150 and the separators 210 and 250 may not be hindered.
- the content of the first adhesive composition may be 0.6wt% or more to 0.9wt% or less, and the content of the second adhesive composition may be 0.1wt% or more to 0.45wt% or less. More specifically, the content of the first adhesive composition may be 0.65wt% or more to 0.85wt% or less, and the content of the second adhesive composition may be 0.15wt% or more to 0.4wt% or less. For example, the content of the first adhesive composition may be 0.7wt% or more to 0.8wt% or less, and the content of the second adhesive composition may be 0.15wt% or more to 0.35wt% or less.
- the first adhesive composition and the second adhesive composition are included in a ratio within the above-described range, respectively, so that the electrodes 110 and 150 and the separators 210 and 250
- the first adhesive portion 310 and the second adhesive portion 350 may be easily dispersed and dissolved in the electrolyte solution while preventing the electrode from being distorted by being fixed therebetween.
- the content of the first adhesive composition is less than 0.6wt% or greater than 0.9wt%, the adhesive strength between the first adhesive portion 310 and the electrode is insufficient, resulting in electrode distortion, or the first adhesive portion 310 Since it is not easily dispersed and dissolved in the electrolyte, an uncharged region may be generated by interfering with the lithium ion path.
- the content of the second adhesive composition is less than 0.1wt% or greater than 0.45wt%, the adhesive force between the lower separator 210 and the upper separator 250 is excessively reduced, or the adhesive composition of the second adhesive part 350 The content of is too large and may deviate from the surface area where the second adhesive portion 350 can be formed.
- the content of the second adhesive composition is higher than that of the electrolyte solution. It may be 0.1wt% or more and 0.2wt% or less. More specifically, in this case, the content of the second adhesive composition may be 0.12wt% or more and 0.18wt% or less relative to the content of the electrolyte solution. For example, in this case, the content of the second adhesive composition may be 0.14wt% or more and 0.16wt% or less relative to the content of the electrolyte solution.
- the battery cell 1000 includes the second adhesive composition in an amount within the above range even though the dispersion of the second adhesive composition is relatively very small, and the electrodes 110 and 150 ) and the separators 210 and 250 are fixed to prevent twisting of the electrode, while the first adhesive portion 310 and the second adhesive portion 350 can be easily dispersed and dissolved in the electrolyte.
- the content of the second adhesive composition is less than 0.1wt% or greater than 0.2wt%, the adhesive strength between the lower separator 210 and the upper separator 250 is excessively reduced, or the adhesion of the second adhesive portion 350 There is a problem in that the content of the composition is too large and the degree of dispersion is reduced.
- a slurry mixed with Al2O3 and PVDF at a weight ratio of 94:6 was applied on both sides (each thickness: 3 ⁇ m) on a polyethylene/polypropylene base sheet (thickness: 10 ⁇ m), and dried at 60° C. to prepare a separator.
- the separator is referred to as an upper separator and a lower separator depending on their location.
- the manufactured lower separator, the cathode, the upper separator, and the anode are alternately stacked in the order, and the first adhesive portion made of acResin 250UV having a content of 0.75 wt% compared to the content of the electrolyte between the separator and the cathode and between the separator and the cathode
- a unit cell was manufactured in which a second adhesive portion made of acResin 250UV having a content of 0.25 wt% of the electrolyte solution was positioned between the upper separator and the lower separator.
- Example 1 a composition made of Technomelt 4046 was used for the first adhesive part. A unit cell was manufactured in the same manner as in Example 1 except for this point.
- Example 1 a composition in which the content of the first adhesive portion is 0.5 wt% based on the content of the electrolyte and the content of the second adhesive portion is 0.25 wt% based on the content of the electrolyte solution was used. A unit cell was manufactured in the same manner as in Example 1 except for this point.
- Example 1 a composition made of Supra502 was used for the first bonding part, and a composition made of Supra502 was used for the second bonding part.
- a unit cell was manufactured in the same manner as in Example 1 except for this point.
- Ionic conductivity was measured using an ion conductivity measuring device using cond probe inlab710 equipment of Mettler Toledo.
- Viscosity can be measured at 10 rpm by replacing the spindle of the Brookfield DV2T LV TJ10 model equipment with a cone and plate and applying the CPA-40Z cone.
- the first adhesive portion and the second adhesive portion have the same or similar degree of dispersion, unlike Comparative Example 4, as in Examples 1 to 3, the first adhesive portion and the second adhesive portion respectively have a relatively high degree of dispersion. It can be confirmed that at least one of acResin 250UV, Loctite EA608, and Technomelt 4046 is suitable.
- Example 1 in the case of Comparative Example 2, in which the total content of the first adhesive portion and the second adhesive portion is small, it can be confirmed that electrode distortion occurs.
- Comparative Example 3 in which the total content of the first adhesive portion and the second adhesive portion is large, it can be confirmed that the viscosity and ionic conductivity cannot be measured because the degree of dispersion is too low.
- the content of the first adhesive is included in the range of 0.6wt% or more to 0.9wt% or less, and the content of the second adhesive is included in the range of 0.1wt% or more to 0.45wt% or less. You can check what is suitable.
- the content of the first adhesive is included in the range of 0.6wt% or more to 0.9wt% or less, and the content of the second adhesive is included in the range of 0.1wt% or more to 0.45wt% or less. You can check what is suitable.
- Example 7 a composition consisting of acResin 250UV having a content of 0.75 wt% was used for the first adhesive part, and a composition consisting of 2802 dismelt having a content of 0.15 wt% was used for the second adhesive part. In this case, it can be confirmed that the dispersion, viscosity, and ionic conductivity are all excellent, and there is no electrode distortion.
- the degree of dispersion of the second bonding portion is too low, measurement of viscosity and ionic conductivity may be impossible. Accordingly, in the case of 2802dispomelt, HPX 002, and EH9702 having an excessively low dispersion of the adhesive composition included in the second adhesive portion, the content of the second adhesive portion is in the range of 0.1 wt% or more to 0.2 wt% or less, as in Example 7. You can check if it is suitable for inclusion.
- a fixing tape may be attached to the electrode assembly 3 , but instead of the fixing tape, one end of the separator 322 may cover a part of the outer surface of the electrode stack 40 .
- the radical unit 30 of this embodiment may be in a state in which the electrodes 3112 and 3122 and the separator 322 are adhered to each other with an adhesive 34 . Accordingly, alignment between the electrodes 3112 and 3122 and the separator 322 can be maintained by the adhesive force of the adhesive 34 .
- the separator 322 covers the upper and lower portions and one side of the electrodes 3112 and 3122, so that the basic units 30 can maintain stacking alignment without the fixing tape. .
- the fixing tape is attached to the outside of the electrode stack 40 or one end of the separator 322 is wrapped around the electrode stack 40 of this embodiment, the stacking alignment of the radical units 30 is more stably maintained.
- the adhesive 34 may be disposed at the same position between the electrodes 3112 and 3122 and the separator 322.
- the adhesive 34 positioned between the bottom of the first electrode 3112 and the separator 322 and the first electrode 3112 may be disposed on the same vertical line based on the first electrode 3112 or the bottom surface of the separator 322, and the gap where the adhesive 34 is disposed. may be equal to each other. This can be similarly explained in the case of the adhesive 34 positioned between the second electrode 3122 and the separator 322 .
- the adhesive 34 is disposed at the same position between the electrodes 3112 and 3122 and the separator 322, so that process time and efficiency can be increased There is an advantage.
- FIG. 8 is a cross-sectional view showing an electrode assembly according to another embodiment of the present invention.
- the adhesive 34 is disposed between the electrodes 3112 and 3122 and the separator 322, and the adhesive 34 disposed on adjacent layers. may be arranged in a staggered form.
- the second adhesive 34-2 between the upper portion of the 3112 and the separation membrane 322 may be displaced from each other.
- the positions of the first adhesive 34-1 and the second adhesive 34-2 are shifted from each other, and the intervals at which they are applied may be the same. This can be similarly explained in the case of the adhesive 14 positioned between the second electrode 3122 and the separator 322 .
- first adhesive 34-1 and the second adhesive 34-2 are displaced from each other may be applied and manufactured by various methods.
- the adhesive 34 is disposed between the electrodes 3112 and 3122 and the separator 322, while the adhesives 34 disposed in adjacent layers are staggered.
- an increase in the thickness of the electrode assembly 4 due to the adhesive 34 can be minimized.
- the adhesives 34 disposed on adjacent layers are offset from each other, the adhesives 34 can be more easily dissolved in the electrolyte solution included in the battery cell described above.
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Abstract
Description
접착 조성물 | 분산도 (전해액 기준) | ||||||
0.02wt% | 0.25wt% | 0.5wt% | 0.75wt% | 1.wt% | 1.25wt% | ||
아크릴계 | acResin 250UV | OK | OK | OK | OK | OK | NG |
EVA계 | Technomelt 4046 | OK | OK | OK | OK | NG | NG |
에폭시계 | Lotite EA608 | OK | OK | OK | OK | NG | NG |
폴리올레핀계 | Supra502 | OK | OK | NG | NG | NG | NG |
고무계 | 2802dispomelt | OK | NG | NG | NG | NG | NG |
폴리아미드계 | HPX 002 | OK | NG | NG | NG | NG | NG |
폴리우레탄계 | EH9702 | OK | NG | NG | NG | NG | NG |
제1 접착부 | 제2 접착부 | 분산도 | 점도 (cPs@25℃) |
이온 전도도 (mS/cm) |
|||
성분 | 함량 | 성분 | 함량 | ||||
실시예 1 | acResin 250UV | 0.75wt% | acResin 250UV | 0.25wt% | OK | 4.08 | 8.45 |
실시예 2 | acResin 250UV | 0.75wt% | Loctite EA608 | 0.25wt% | OK | 4.10 | 8.40 |
실시예 3 | acResin 250UV | 0.75wt% | Technomelt 4046 | 0.25wt% | OK | 4.11 | 8.42 |
실시예 4 | acResin 250UV | 0.75wt% | Supra502 | 0.25wt% | OK | 4.11 | 8.27 |
실시예 5 | Loctite EA608 | 0.75wt% | Supra502 | 0.25wt% | OK | 4.17 | 8.41 |
실시예 6 | Technomelt 4046 | 0.75wt% | Supra502 | 0.25wt% | OK | 4.21 | 8.33 |
실시예 7 | acResin 250UV | 0.75wt% | 2802dispomelt | 0.15wt% | OK | 4.15 | 8.25 |
비교예 1 | acResin 250UV | 0.25wt% | acResin 250UV | 0.75wt% | OK | 4.08 | 8.45 |
비교예 2 | acResin 250UV | 0.5wt% | acResin 250UV | 0.25wt% | OK | 3.95 | 8.56 |
비교예 3 | acResin 250UV | 0.75wt% | acResin 250UV | 0.5wt% | NG | - | - |
비교예 4 | Supra502 | 0.75wt% | Supra502 | 0.25wt% | NG | - | - |
비교예 5 | Supra502 | 0.75wt% | acResin 250UV | 0.25wt% | NG | - | - |
제1 접착부 | 제2 접착부 | 전극 틀어짐 | |||
성분 | 함량 | 성분 | 함량 | ||
실시예 1 | acResin 250UV | 0.75wt% | acResin 250UV | 0.25wt% | OK |
실시예 2 | acResin 250UV | 0.75wt% | Loctite EA608 | 0.25wt% | OK |
실시예 3 | acResin 250UV | 0.75wt% | Technomelt 4046 | 0.25wt% | OK |
실시예 4 | acResin 250UV | 0.75wt% | Supra502 | 0.25wt% | OK |
실시예 5 | Loctite EA608 | 0.75wt% | Supra502 | 0.25wt% | OK |
실시예 6 | Technomelt 4046 | 0.75wt% | Supra502 | 0.25wt% | OK |
실시예 7 | acResin 250UV | 0.75wt% | 2802dispomelt | 0.15wt% | OK |
비교예 1 | acResin 250UV | 0.25wt% | acResin 250UV | 0.75wt% | NG |
비교예 2 | acResin 250UV | 0.5wt% | acResin 250UV | 0.25wt% | NG |
비교예 3 | acResin 250UV | 0.75wt% | acResin 250UV | 0.5wt% | OK |
비교예 4 | Supra502 | 0.75wt% | Supra502 | 0.25wt% | OK |
비교예 5 | Supra502 | 0.75wt% | acResin 250UV | 0.25wt% | OK |
Claims (34)
- 정해진 개수만큼 교대로 적층되어 있는 분리막과 전극;상기 분리막과 상기 전극 사이에 위치하되, 제1 접착 조성물로 이루어지는 제1 접착부; 및상기 분리막과 다른 분리막 사이에 위치하되, 제2 접착 조성물로 이루어지는 제2 접착부를 포함하고,상기 제1 접착 조성물의 분산도는 상기 제2 접착 조성물의 분산도보다 큰 단위 셀.
- 제1항에서,상기 제1 접착 조성물은 에틸렌-비닐 아세테이트(EVA, Ethylene vinyl acetate)계 물질, 아크릴계 물질, 및 에폭시계 물질 중 적어도 하나로 이루어지고,상기 제2 접착 조성물은 에틸렌-비닐 아세테이트(EVA, Ethylene vinyl acetate)계 물질, 아크릴계 물질, 에폭시계 물질, 폴리 올레핀계 물질, 고무(Rubber)계 물질, 폴리아미드계 물질, 및 폴리우레탄계 물질 중 적어도 하나로 이루어지는 단위 셀.
- 제1항에서,상기 제2 접착 조성물은 폴리 올레핀계 물질, 고무(Rubber)계 물질, 폴리아미드계 물질, 및 폴리우레탄계 물질 중 적어도 하나로 이루어지는 단위 셀.
- 제1항에서,상기 분리막은 하부 분리막 및 상부 분리막을 포함하고,상기 전극은 제1 전극 및 제2 전극을 포함하고,상기 하부 분리막, 상기 제1 전극, 상기 상부 분리막, 및 상기 제2 전극 순으로 적층되어 있는 단위 셀.
- 제4항에서,상기 제1 접착부는 상기 제1 전극과 상기 하부 분리막 사이, 상기 제1 전극과 상기 상부 분리막 사이, 및 상기 제2 전극과 상기 상부 분리막 사이 중 적어도 하나에 위치하는 단위 셀.
- 제5항에서,상기 제2 접착부는 상기 상부 분리막과 상기 하부 분리막 사이에 위치하는 단위 셀.
- 제1항에서,상기 제1 접착부 및 상기 제2 접착부는 각각 복수의 도트를 포함하는 패턴으로 형성되어 있는 단위 셀.
- 제7항에서,상기 복수의 도트는 서로 이격되어 있는 단위 셀.
- 제1항에 따른 단위 셀을 교대로 적층하여 형성된 전극 조립체에 있어서,상기 제1 접착부는 상기 전극과 상기 분리막 사이마다 동일한 위치에 배치되는 접착 패턴을 포함하는 전극 조립체.
- 제1항에 따른 단위 셀을 교대로 적층하여 형성된 전극 조립체에 있어서,상기 제1 접착부는 상기 전극과 상기 분리막 사이마다 서로 엇갈린 형태로 배치되는 접착 패턴을 포함하는 전극 조립체.
- 제1항의 단위 셀이 교대로 적층되어 있는 전극 조립체과 함께 전해액을 포함하는 전지 셀.
- 제11항에서,상기 제1 접착부는 상기 전해액에 용해되어 있는 전지 셀.
- 제11항에서,상기 제1 접착 조성물은 에틸렌-비닐 아세테이트(EVA, Ethylene vinyl acetate)계 물질, 아크릴계 물질, 및 에폭시계 물질 중 적어도 하나로 이루어지고,상기 제2 접착 조성물은 에틸렌-비닐 아세테이트(EVA, Ethylene vinyl acetate)계 물질, 아크릴계 물질, 에폭시계 물질, 폴리 올레핀계 물질, 고무(Rubber)계 물질, 폴리아미드계 물질, 및 폴리우레탄계 물질 중 적어도 하나로 이루어지는 전지 셀.
- 제13항에서,상기 제1 접착 조성물 및 상기 제2 접착 조성물의 총 함량은 상기 전해액의 함량 대비 0.8wt% 이상 내지 1.2wt% 이하인 전지 셀.
- 제14항에서,상기 제1 접착 조성물의 총 함량은 상기 전해액의 함량 대비 0.6wt% 이상 내지 0.9wt% 이하이고,상기 제2 접착 조성물의 총 함량은 상기 전해액의 함량 대비 0.1wt% 이상 내지 0.45wt% 이하인 전지 셀.
- 제13항에서,상기 제2 접착 조성물은 고무(Rubber)계 물질, 폴리아미드계 물질, 및 폴리우레탄계 물질 중 적어도 하나로 이루어지는 전지 셀.
- 제16항에서,상기 제2 접착 조성물의 총 함량은 상기 전해액의 함량 대비 0.1wt% 이상 내지 0.2wt% 이하인 전지 셀.
- 제11항에서,상기 전해액은 유기계 액체 전해질, 무기계 액체 전해질, 고체 고분자 전해질, 겔형 고분자 전해질, 고체 무기 전해질, 및 용융형 무기 전해질 중 적어도 하나로 이루어지는 전지 셀.
- 제1항에서,상기 분리막이 폴딩되어 지그재그 형태를 갖는 전지 셀.
- 전극의 제1 면 또는 제1 분리막의 접합 영역 중 적어도 어느 하나에 제1 접착제를 적용하는 단계;상기 제1 접착제를 상기 전극의 제2 면 또는 제2 분리막의 접합 영역 중 적어도 하나에 적용하는 단계로서, 상기 전극의 제2 면은 상기 제1 면으로부터 상기 전극의 반대편에 위치하는 단계;상기 제1 분리막의 주변 영역 또는 상기 제2 분리막의 주변 영역 중 적어도 하나에 제2 접착제를 적용하는 단계; 및상기 전극의 제1 면이 상기 제1 분리막의 접합 영역에 접하고, 상기 전극의 제2 면이 상기 제2 분리막의 접합 영역에 접하도록 상기 제1 분리막과 상기 제2 분리막 사이에 상기 전극을 적층함으로써 적어도 일부의 전극 조립체를 형성하는 단계를 포함하고,상기 전극 조립체는 상기 제1, 2 분리막 각각의 주변 영역이 상기 전극의 가장자리를 넘어 외측으로 연장되도록 형성되며,상기 제1, 2 분리막 각각의 주변 영역은 그 사이에 전극을 두지 않으면서 서로 대향하고,상기 제1 접착제의 전해액 내 분산도는 상기 제2 접착제의 상기 전해액 내 분산도보다 큰 단위 셀의 제조 방법.
- 제20항에서,상기 전해액에서 상기 제1 접착제의 분산도는 상기 전해액에서 상기 제2 접착제의 분산도보다 큰 단위 셀의 제조 방법.
- 제20항에서,상기 제1, 2 분리막 각각의 주변 영역은 상기 제1, 2 분리막 각각의 둘레 주위로 연장되어, 상기 주변 영역 각각이 상기 제1, 2 분리막 각각의 접합 영역을 둘러싸는 단위 셀의 제조 방법.
- 제20항에서,상기 제1 접착제는 에틸렌-비닐 아세테이트(EVA)계 물질, 아크릴계 물질, 및 에폭시계 물질 중 적어도 하나로 이루어지고, 상기 제2 접착제는 에틸렌-비닐 아세테이트(EVA)계 물질, 아크릴계 물질, 에폭시계 물질, 폴리 올레핀계 물질, 고무(Rubber)계 물질, 폴리아미드계 물질, 및 폴리우레탄계 물질 중 적어도 하나로 이루어지는 단위 셀의 제조 방법.
- 제20항에서,상기 제1 접착제 및 상기 제2 접착제는 서로 이격된 각각의 도트 패턴으로 각각 도포되는 단위 셀의 제조 방법.
- 제24항에서,상기 제1 접착제의 도트 패턴에서 도트는 행과 열의 격자로 배열되는 단위 셀의 제조 방법.
- 제20항의 단위 셀을 교대로 적층하여 전극 조립체를 형성하는 단계; 및상기 전극 조립체 및 전해액을 전지 케이스에 배치하는 단계를 포함하는 전지 셀의 제조 방법.
- 제26항에서,상기 제1 접착체의 적어도 일부를 상기 전해액에 용해시키는 단계를 더 포함하는 전지 셀의 제조 방법.
- 제26항에서,상기 전해액은 유기계 액체 전해질, 무기계 액체 전해질, 고체 고분자 전해질, 겔형 고분자 전해질, 고체 무기 전해질, 및 용융형 무기 전해질 중 적어도 하나로 이루어진 전지 셀 제조 방법.
- 제26항에서,상기 제1 접착제의 총 함량은 상기 전해액의 총 함량 대비 0.6wt% 이상 0.9wt% 이하인 전지 셀의 제조 방법.
- 제26항에서,상기 제2 접착제의 총 함량은 상기 전해액의 총 함량 대비 0.1wt% 이상 0.45wt% 이하인 전지 셀의 제조 방법.
- 제26항에서,상기 전지 케이스 내에서 상기 제1 접착제 및 상기 제2 접착제의 총 함량은 상기 전지 케이스 내에서 상기 전해액의 총 함량 대비 0.8wt% 이상 1.2wt% 이하인 전지 셀의 제조 방법.
- 제31항에서,상기 전지 케이스 내에서 상기 제1 접착제의 총 함량은 상기 전지 케이스 내에서 상기 전해액의 총 함량 대비 0.6wt% 이상 0.9wt% 이하이고,상기 전지 케이스 내에서 상기 제2 접착제의 총 함량은 상기 전지 케이스 내에서 상기 전해액의 총 함량 대비 0.1wt% 이상 0.45wt% 이하인 전지 셀의 제조 방법.
- 제26항에서,상기 제2 접착제는 폴리 올레핀계 물질, 고무(Rubber)계 물질, 폴리아미드계 물질, 및 폴리우레탄계 물질 중 적어도 하나로 이루어지는 전지 셀의 제조 방법.
- 제33항에서,상기 전지 케이스 내에서 상기 제2 접착제의 총 함량은 상기 전지 케이스 내에서 상기 전해액의 총 함량 대비 0.1wt% 이상 내지 0.2wt% 이하인 전지 셀의 제조 방법.
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KR101084909B1 (ko) * | 2009-12-07 | 2011-11-17 | 삼성에스디아이 주식회사 | 전극조립체블록 및 그 제조 방법, 이차전지 및 그 제조 방법 |
KR20110138719A (ko) * | 2010-06-21 | 2011-12-28 | 김영덕 | 포케팅 전극체, 이를 포함하는 전극 조립체 및 이를 이용한 리튬 이차전지 |
KR101589811B1 (ko) * | 2013-04-17 | 2016-01-28 | 미쯔비시 지도샤 고교 가부시끼가이샤 | 이차 전지 |
JP2017050215A (ja) * | 2015-09-03 | 2017-03-09 | 日産自動車株式会社 | リチウムイオン二次電池の製造方法 |
KR20200058222A (ko) * | 2018-11-19 | 2020-05-27 | 삼성에스디아이 주식회사 | 전극 조립체 및 그의 제조 방법 |
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KR101084909B1 (ko) * | 2009-12-07 | 2011-11-17 | 삼성에스디아이 주식회사 | 전극조립체블록 및 그 제조 방법, 이차전지 및 그 제조 방법 |
KR20110138719A (ko) * | 2010-06-21 | 2011-12-28 | 김영덕 | 포케팅 전극체, 이를 포함하는 전극 조립체 및 이를 이용한 리튬 이차전지 |
KR101589811B1 (ko) * | 2013-04-17 | 2016-01-28 | 미쯔비시 지도샤 고교 가부시끼가이샤 | 이차 전지 |
JP2017050215A (ja) * | 2015-09-03 | 2017-03-09 | 日産自動車株式会社 | リチウムイオン二次電池の製造方法 |
KR20200058222A (ko) * | 2018-11-19 | 2020-05-27 | 삼성에스디아이 주식회사 | 전극 조립체 및 그의 제조 방법 |
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