CN111193074B - Detachable lithium slurry battery's compound unit and contain its lithium slurry battery - Google Patents
Detachable lithium slurry battery's compound unit and contain its lithium slurry battery Download PDFInfo
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- CN111193074B CN111193074B CN201911265681.3A CN201911265681A CN111193074B CN 111193074 B CN111193074 B CN 111193074B CN 201911265681 A CN201911265681 A CN 201911265681A CN 111193074 B CN111193074 B CN 111193074B
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 81
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 239000002002 slurry Substances 0.000 title claims abstract description 47
- 150000001875 compounds Chemical group 0.000 title description 8
- 239000002131 composite material Substances 0.000 claims abstract description 56
- 239000000843 powder Substances 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 55
- 239000002245 particle Substances 0.000 claims description 29
- 239000006258 conductive agent Substances 0.000 claims description 18
- 238000002955 isolation Methods 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 239000007773 negative electrode material Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000008929 regeneration Effects 0.000 abstract description 5
- 238000011069 regeneration method Methods 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 description 42
- 239000002184 metal Substances 0.000 description 42
- -1 polypropylene Polymers 0.000 description 25
- 239000000835 fiber Substances 0.000 description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 14
- 229910052802 copper Inorganic materials 0.000 description 14
- 239000010949 copper Substances 0.000 description 14
- 239000011267 electrode slurry Substances 0.000 description 13
- 239000003792 electrolyte Substances 0.000 description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 239000004698 Polyethylene Substances 0.000 description 8
- 239000004743 Polypropylene Substances 0.000 description 8
- 229920000573 polyethylene Polymers 0.000 description 8
- 229920001155 polypropylene Polymers 0.000 description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 8
- 239000010935 stainless steel Substances 0.000 description 8
- 229910001220 stainless steel Inorganic materials 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 229920000049 Carbon (fiber) Polymers 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 6
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- 239000007769 metal material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 5
- 239000006229 carbon black Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 239000007774 positive electrode material Substances 0.000 description 5
- 239000011135 tin Substances 0.000 description 5
- 229910052718 tin Inorganic materials 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 4
- 229920004933 Terylene® Polymers 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229920006231 aramid fiber Polymers 0.000 description 4
- 229910021393 carbon nanotube Inorganic materials 0.000 description 4
- 239000002041 carbon nanotube Substances 0.000 description 4
- 229910021389 graphene Inorganic materials 0.000 description 4
- 239000003273 ketjen black Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 239000011368 organic material Substances 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 239000002861 polymer material Substances 0.000 description 4
- 229920000915 polyvinyl chloride Polymers 0.000 description 4
- 239000004800 polyvinyl chloride Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 244000025254 Cannabis sativa Species 0.000 description 3
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 3
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 3
- 229920002319 Poly(methyl acrylate) Polymers 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 3
- 239000004721 Polyphenylene oxide Substances 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 3
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 3
- 229910003481 amorphous carbon Inorganic materials 0.000 description 3
- 235000009120 camo Nutrition 0.000 description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 description 3
- 235000005607 chanvre indien Nutrition 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002003 electrode paste Substances 0.000 description 3
- 239000011487 hemp Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 150000002825 nitriles Chemical class 0.000 description 3
- 229920002239 polyacrylonitrile Polymers 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 229920000570 polyether Polymers 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 3
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- FDLZQPXZHIFURF-UHFFFAOYSA-N [O-2].[Ti+4].[Li+] Chemical compound [O-2].[Ti+4].[Li+] FDLZQPXZHIFURF-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical class [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229910009866 Ti5O12 Inorganic materials 0.000 description 1
- GJEAMHAFPYZYDE-UHFFFAOYSA-N [C].[S] Chemical class [C].[S] GJEAMHAFPYZYDE-UHFFFAOYSA-N 0.000 description 1
- RLTFLELMPUMVEH-UHFFFAOYSA-N [Li+].[O--].[O--].[O--].[V+5] Chemical class [Li+].[O--].[O--].[O--].[V+5] RLTFLELMPUMVEH-UHFFFAOYSA-N 0.000 description 1
- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 description 1
- IDSMHEZTLOUMLM-UHFFFAOYSA-N [Li].[O].[Co] Chemical class [Li].[O].[Co] IDSMHEZTLOUMLM-UHFFFAOYSA-N 0.000 description 1
- YJSAVIWBELEHDD-UHFFFAOYSA-N [Li].[Si]=O Chemical compound [Li].[Si]=O YJSAVIWBELEHDD-UHFFFAOYSA-N 0.000 description 1
- FBDMTTNVIIVBKI-UHFFFAOYSA-N [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] Chemical class [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] FBDMTTNVIIVBKI-UHFFFAOYSA-N 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- NDPGDHBNXZOBJS-UHFFFAOYSA-N aluminum lithium cobalt(2+) nickel(2+) oxygen(2-) Chemical class [Li+].[O--].[O--].[O--].[O--].[Al+3].[Co++].[Ni++] NDPGDHBNXZOBJS-UHFFFAOYSA-N 0.000 description 1
- 239000006256 anode slurry Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000002322 conducting polymer Substances 0.000 description 1
- 239000002482 conductive additive Substances 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- JVZGJLAPJLXQKT-UHFFFAOYSA-N lithium iron(2+) manganese(2+) nickel(2+) oxygen(2-) Chemical class [O-2].[Fe+2].[Mn+2].[Li+].[Ni+2] JVZGJLAPJLXQKT-UHFFFAOYSA-N 0.000 description 1
- 229910002102 lithium manganese oxide Inorganic materials 0.000 description 1
- FRMOHNDAXZZWQI-UHFFFAOYSA-N lithium manganese(2+) nickel(2+) oxygen(2-) Chemical class [O-2].[Mn+2].[Ni+2].[Li+] FRMOHNDAXZZWQI-UHFFFAOYSA-N 0.000 description 1
- QEXMICRJPVUPSN-UHFFFAOYSA-N lithium manganese(2+) oxygen(2-) Chemical class [O-2].[Mn+2].[Li+] QEXMICRJPVUPSN-UHFFFAOYSA-N 0.000 description 1
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 229910052912 lithium silicate Inorganic materials 0.000 description 1
- 229910000686 lithium vanadium oxide Inorganic materials 0.000 description 1
- ILXAVRFGLBYNEJ-UHFFFAOYSA-K lithium;manganese(2+);phosphate Chemical compound [Li+].[Mn+2].[O-]P([O-])([O-])=O ILXAVRFGLBYNEJ-UHFFFAOYSA-K 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- PTISTKLWEJDJID-UHFFFAOYSA-N sulfanylidenemolybdenum Chemical class [Mo]=S PTISTKLWEJDJID-UHFFFAOYSA-N 0.000 description 1
- RCYJPSGNXVLIBO-UHFFFAOYSA-N sulfanylidenetitanium Chemical class [S].[Ti] RCYJPSGNXVLIBO-UHFFFAOYSA-N 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 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
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a detachable lithium paste battery composite unit and a lithium paste battery comprising the same. This detachable lithium thick liquids battery's composite unit makes the integral structure through the negative pole electrode piece that will be equipped with the negative pole active layer of half dry thick liquids attitude/dry powder attitude with other functional parts, make can make the direct fixed mounting of composite unit of this battery in the battery case when the preparation battery, the reaction chamber that has reduced to pour into thick nature negative pole thick liquids into to narrow negative pole chamber and has blockked up the scheduling problem, also can dismantle the composite unit of whole battery from the battery case and carry out material regeneration and utilization when treating recovery battery, and convenient composite unit to the battery of battery inside changes many times, thereby realize the purpose that lithium thick liquids battery maintained regeneration. The positive and negative electrode tabs of the composite unit of the detachable lithium slurry battery are separately led out through the through grooves and the through holes arranged at intervals on the battery shell, so that the production efficiency of the lithium slurry battery is improved.
Description
Technical Field
The invention relates to the field of batteries, in particular to a detachable lithium paste battery composite unit and a lithium paste battery comprising the same.
Background
The lithium slurry battery is a new battery technology, and takes electrode slurry as a main material for realizing electrochemical functions. The electrode in the slurry state is in a solid-liquid two-phase mixed state formed by dispersing electrode active particles and a conductive additive in electrolyte, so that the problem of cycle life attenuation caused by falling or loosening of an electrode material in a traditional lithium ion battery can be solved, and the electrode has higher solid particle content and energy density, so that the electrode is suitable for being applied to the fields of small electric vehicles or household energy storage.
The existing lithium slurry battery usually adopts a reactor structure with a plurality of layers of anode cavities and cathode cavities which are overlapped in a crossed manner, and in the manufacturing process of the battery, electrode slurry is respectively injected into each anode cavity and each cathode cavity to form a dynamic conductive network in the anode cavity and the cathode cavity. The thickness of the positive and negative electrode cavities is usually not more than 8mm, and the ratio of the thickness of the negative electrode cavity to the thickness of the positive electrode cavity is required to be 1: 2-1: 3. Therefore, the negative electrode slurry is a non-aqueous suspension with high viscosity, and cannot be smoothly and uniformly injected into a narrow negative electrode cavity, so that the problems of insufficient electrochemical reaction or reaction cavity blockage of the lithium slurry battery and the like are caused; in addition, the overall performance and scale implementation of the lithium slurry battery are limited to a certain extent by factors such as difficulty in arrangement of the positive and negative electrode tabs led out from the positive and negative electrode cavities.
Disclosure of Invention
In view of the above problems, the present invention provides a detachable lithium paste battery composite unit and a lithium paste battery including the same. This detachable lithium thick liquids battery's composite unit makes the integral structure through the negative pole electrode piece that will be equipped with the negative pole active layer of half dry thick liquids attitude/dry powder attitude with other functional parts, make can be with the direct fixed mounting of composite unit of this battery in the battery case when preparation lithium thick liquids battery, the reaction chamber that has reduced to pour into thick nature negative pole thick liquids into to narrow negative pole chamber and has blockked up the scheduling problem, also can dismantle the composite unit of whole battery from the battery case and carry out material regeneration and utilization when treating recovery battery, and convenient composite unit to the battery inside changes many times, thereby realize that lithium thick liquids battery maintains the purpose of regeneration. The positive and negative electrode tabs of the composite unit of the detachable lithium slurry battery are separately led out through the through grooves and the through holes arranged at intervals on the battery shell, so that the production efficiency of the lithium slurry battery is improved.
The technical scheme provided by the invention is as follows:
the invention provides a detachable composite unit of a lithium slurry battery, which comprises a negative electrode sealing frame, a negative electrode plate, a negative electrode tab and an isolating layer, wherein the negative electrode plate comprises a negative electrode current collecting layer and negative electrode active layers coated on two sides of the negative electrode current collecting layer. The negative electrode sealing frame, the negative electrode plate, the negative electrode tab and the isolation layer are sequentially stacked according to the sequence of the isolation layer, the negative electrode sealing frame, the negative electrode tab, the negative electrode plate, the other negative electrode sealing frame and the other isolation layer.
The two sides of the negative current collecting layer are both provided with negative active layers, and the thickness of the negative active layers can be 0.5 mm-5 mm, and can be 0.8mm specifically; the negative active layer can be fixed on the negative current collecting layer by welding, spraying, bonding, electrochemical plating, chemical plating or mechanical pressing. The negative active layer is partially or totally non-bonded and fixed negative active conductive particles, is usually in a semi-dry slurry state or a dry powder state, and has a solid content of 40-100% and a stacking porosity of more than 5% and less than 60%; specifically, it may be 30%. In the case of being immersed in the electrolytic solution, the non-adhesively fixed anode active conductive particles can move in the electrolytic solution and form an anode slurry. The negative active conductive particles are a conductive agent or a composite or mixture of a negative active material and a conductive agent. The mass ratio of the negative electrode active material to the conductive agent is 20-98: 80-2, specifically 80: 20; the average particle diameter of the negative active conductive particles may be 0.05 to 500 μm; specifically, it may be 150. mu.m. The negative active material is a material capable of reversibly releasing lithium during charging, and comprises aluminum-based alloy, silicon-based alloy and tin-based alloy capable of inserting lithiumAlloy, lithium titanium oxide (Li)4Ti5O12) Lithium silicon oxide, lithium metal powder, graphite, and the like. The conductive agent can be one or more of carbon black, ketjen black, graphene, carbon nanotubes, carbon fibers, amorphous carbon, metal conductive particles and metal conductive fibers.
The negative current collecting layer can be an electronic conducting layer with a through hole structure and a thickness of 1-2000 mu m, preferably 0.05-1000 mu m or 0.8mm, the pore diameter of the negative current collecting layer can be 0.01-2000 mu m, preferably 10-1000 mu m or 150 mu m or 200 mu m, and the porosity of the through hole can be 10-90%; specifically, it may be 60%. The negative current collecting layer can be a conductive metal layer, the conductive metal layer can be a metal net or a metal wire mesh grid, and meshes can be square, rhombic, rectangular or polygonal; alternatively, the conductive metal layer may be a porous foam metal layer having a porous structure; alternatively, the conductive metal layer may be a porous metal plate or a porous metal foil, and the material of the conductive metal layer may be stainless steel, nickel, titanium, tin, copper, tin-plated copper, nickel-plated copper, or the like. Or the negative current collecting layer can be carbon fiber conductive cloth or conductive cloth mixed by metal wires and organic fiber wires, and the metal wires can be made of stainless steel, nickel, titanium, tin, copper, tin-plated copper or nickel-plated copper and the like; the organic fiber yarn comprises one or more of natural cotton and hemp, terylene, aramid fiber, nylon, polypropylene fiber, polyethylene and polytetrafluoroethylene. Or the negative current collecting layer can be a metal conductive layer with a conductive coating or a metal film coated on the surface, conductive cloth, an inorganic non-metallic material, and a porous organic material, the conductive coating can be a compound of a conductive agent and a binder or a conductive agent, and a negative lithium storage active material and a binder, the compound mode can be bonding, spraying, evaporating or mechanical pressing, the porous organic material can include natural cotton hemp, terylene, aramid fiber, nylon, polypropylene fiber, polyethylene, polytetrafluoroethylene, and the like, the inorganic non-metallic material can include glass fiber non-woven fabric, ceramic fiber paper, and the like, the conductive film can be stainless steel, nickel, titanium, tin, copper, tin-plated copper, nickel-plated copper, and the like, the conductive agent can be one or more of carbon black, kokui, graphene, carbon nanotubes, carbon fibers, amorphous carbon, metal conductive particles, and metal conductive fibers, the metal conductive particles or the metal conductive fibers can be made of stainless steel, nickel, titanium, tin, copper, tin-plated copper or nickel-plated copper and the like, and the binder can be one or more of polyvinyl chloride, polyethylene, polypropylene, polystyrene, polytetrafluoroethylene, polyterephthalate, polyamide, polyimide, polyether nitrile, polymethyl acrylate, polyvinylidene fluoride, polyurethane, polyacrylonitrile, styrene-butadiene rubber, sodium carboxymethylcellulose and modified polyolefin. Alternatively, the negative current collector layer may be a combination of any two or more of the above.
The negative pole lug can be a metal sheet shaped like a Chinese character 'hui', the electric connection mode of the negative pole lug and the peripheral edge of the negative pole lug in close contact is favorable for uniform current collection, and the situations of heating and the like caused by high-rate charge and discharge can be avoided. The negative pole tab can be fixed on the negative pole electrode plate in a welding, bonding or pressure clamping mode.
The negative electrode sealing frame can be two frames shaped like a Chinese character hui, and the two sides of the composite structure of the negative electrode plate and the negative electrode lug are respectively provided with peripheral edges for insulation sealing. The negative electrode sealing frame can be connected to the composite structure of the negative electrode plate and the negative electrode tab in a welding, bonding or pressure clamping mode. The thickness of the negative electrode sealing frame can be 0.25 mm-2.5 mm, a negative electrode active layer with certain thickness can be contained by utilizing a groove formed between the negative electrode sealing frame and the negative electrode current collecting layer, and a cavity for containing negative electrode slurry is formed when electrolyte is injected into the battery at the later stage. The material of the negative electrode sealing frame can be an insulating electrolyte-resistant polymer material, and the insulating electrolyte-resistant polymer material is one or more of polyvinyl chloride, polyethylene, polypropylene, polystyrene, polytetrafluoroethylene, polyester terephthalate, polyamide, polyimide, polyether nitrile, polymethyl acrylate, polyvinylidene fluoride, polyurethane, polyacrylonitrile, styrene butadiene rubber, sodium carboxymethylcellulose and modified polyolefin.
The outer side of the overall structure formed by compounding the negative electrode sealing frame, the negative electrode lug and the negative electrode plate can be provided with an isolating layer, the isolating layer has the function of isolating the positive electrode and the negative electrode of the battery to prevent short circuit, and the falling of the negative electrode active layer can be avoided to a certain extent so as to fix the negative electrode active layer. The material of the isolating layer can be an electronic non-conducting porous polymer material; or the material of the isolation layer can be a porous material compounded by an electronic non-conductive inorganic non-metallic material and an organic polymer; or the material of the isolating layer can be a gel polymer electrolyte composite material formed by compounding an electronic non-conducting polymer matrix, a liquid organic plasticizer and lithium salt; alternatively, the material of the isolation layer may be an electrolyte or a polymer colloid material which is impregnated with ionic conduction in the pores of a porous polymer material which is not electronically conductive or in the pores of a porous material which is a composite of an inorganic non-metallic material and an organic polymer, or the like.
The composite unit of the lithium slurry battery further comprises a positive current collecting layer and a positive electrode lug arranged on one side of the positive current collecting layer, which is not provided with the positive electrode lug, is composited on the outer side of the isolating layer, and the compositing mode comprises welding, bonding or pressure clamping. Preferably, the positive and negative electrode current collecting layers, the positive and negative electrode tabs, the isolating layer, the negative electrode sealing frame and the negative electrode plate are manufactured into an integrated structure, and the integrated structure can be directly arranged in a battery shell when a battery is installed and can be integrally disassembled when the battery is recycled, so that the battery assembling efficiency is improved.
The positive current collecting layer can be an electronic conducting layer with a through hole structure and a thickness of 1-2000 mu m, preferably 0.05-1000 mu m, the aperture of the positive current collecting layer can be 0.01-2000 mu m, preferably 10-1000 mu m or 100 mu m, and the porosity of the through hole can be 10-90%; specifically, it may be 50%. The positive current collecting layer can be a conductive metal layer, the conductive metal layer is a metal net or a metal wire mesh grid, and meshes can be square, diamond, rectangular or polygonal; or the conductive metal layer is a foam metal net with a through hole structure; alternatively, the conductive metal layer is a porous metal plate or a porous metal foil, and the material of the conductive metal layer may be stainless steel, aluminum, silver, or the like. Or the positive current collecting layer can be carbon fiber conductive cloth or conductive cloth mixed by metal wires and organic fiber wires, the metal wires can be made of aluminum, alloy aluminum, stainless steel or silver, and the organic fiber wires can comprise one or more of natural cotton hemp, terylene, aramid fiber, nylon, polypropylene fiber, polyethylene, polytetrafluoroethylene and the like. Or, the positive current collecting layer is a metal conductive layer with a conductive coating or a metal film coated on the surface, a conductive cloth, an inorganic non-metallic material and a porous organic material, the conductive coating is a mixture of a conductive agent and a binder or the conductive coating is a mixture of a conductive agent, a positive active material and a binder, the mixing mode is bonding, spraying, evaporation or mechanical pressing, the porous organic material comprises natural cotton-flax, terylene, aramid fiber, nylon, polypropylene fiber, polyethylene and polytetrafluoroethylene, the inorganic non-metallic material comprises glass fiber non-woven fabric and ceramic fiber paper, the conductive agent is one or more of carbon black, ketjen black, graphene, carbon nanotubes, carbon fibers, amorphous carbon, metal conductive particles and metal conductive fibers, the metal conductive particles or the metal conductive fibers can be aluminum, stainless steel or silver, and the binder can be polyvinyl chloride, stainless steel, silver, and the like, One or more of polyethylene, polypropylene, polystyrene, polytetrafluoroethylene, polyester terephthalate, polyamide, polyimide, polyether nitrile, polymethyl acrylate, polyvinylidene fluoride, polyurethane, polyacrylonitrile, styrene-butadiene rubber, sodium carboxymethylcellulose and modified polyolefin. Or the positive current collecting layer is a combination of any two or more of the above.
Similarly, the positive electrode lug can be a metal sheet shaped like a Chinese character 'hui', the electric connection mode of the positive electrode lug and the peripheral edge of the positive electrode plate in close contact is favorable for uniform current collection, and the situations of heating and the like caused by high-rate charge and discharge can be avoided. The positive electrode tab can be fixed on the positive electrode plate in a welding, bonding or pressure clamping mode.
According to the present invention, there is also provided a lithium paste battery including the detachable lithium paste battery composite unit of the present invention. The lithium slurry battery comprises a battery core and a battery shell for accommodating the battery core, wherein the battery core comprises positive slurry, a positive sealing frame and the detachable lithium slurry battery composite unit. The positive electrode sealing frame is a U-shaped frame, can be independently arranged or integrally formed with the inner cavity of the battery shell, and the width of the frame body of the frame is usually not more than 8 mm; in particular, it may be 3 or 6 mm. Under the condition that the positive electrode sealing frame is independently arranged, the positive electrode sealing frame can be firstly compounded with the positive electrode current collecting layer and the positive electrode lug in a welding and bonding mode, and then alternately stacked with a detachable lithium slurry battery compound unit comprising the negative electrode sealing frame, the negative electrode plate, the negative electrode lug and the isolation layer to form a negative electrode part and a positive electrode part; or the positive electrode sealing frame can be directly and alternately stacked with a composite unit of the detachable lithium slurry battery comprising the positive electrode current collecting layer, the positive electrode tab, the negative electrode sealing frame, the negative electrode plate, the negative electrode tab and the isolating layer to form the negative electrode part and the positive electrode part. Under the condition that the positive sealing frame and the internal cavity of the battery case are integrally formed, the detachable lithium slurry battery composite unit comprising the positive current collecting layer, the positive electrode lug, the negative sealing frame, the negative electrode plate, the negative electrode lug and the isolating layer can be directly installed in a cavity between the two sealing frames in the battery case, so that the detachable lithium slurry battery composite unit and the sealing frames are alternately stacked to form a negative part and a positive part. The positive electrode part contains positive electrode slurry, and the positive electrode slurry is injected into the positive electrode part of the battery cell through a grouting device outside the battery. The negative electrode part contains part or all of the non-adhesive fixed negative active conductive particles, and electrolyte is injected into the negative electrode part of the battery core through a liquid injection device outside the battery, so that the non-adhesive fixed negative active conductive particles are suspended in the electrolyte to form negative slurry. The frame width of the positive electrode sealing frame determines the capacity of positive electrode slurry which can be contained in the positive electrode part, and meanwhile, the frame width plays a role in limiting the composite unit of the detachable lithium slurry battery. The lithium slurry battery can change the number and arrangement mode of the composite units of the anode frame and the detachable lithium slurry battery according to the battery capacity requirement, so that the battery structure is flexible and controllable, and the process is simplified.
The positive electrode slurry can comprise electrolyte and positive electrode active conductive particles capable of flowing in the electrolyte, wherein the positive electrode active conductive particles account for 5-80% of the positive electrode slurry by mass, and specifically can be 60%; the average grain diameter is 0.5-500 mu m; specifically, it may be 150. mu.m. The positive active conductive particles can be one or a plurality of compounds of conductive agents such as carbon black, Ketjen black, graphene, carbon nanotubes, carbon fibers, various metal conductive particles and the like, and the compound mode comprises surface coating, bonding or mechanical mixing and the like; or the positive active conductive particles can be a compound or a mixture of a positive active material and the various conductive agents, wherein the mass ratio of the positive active material to the conductive agent is 0-98: 100-2, specifically 70: 30; the compounding or mixing mode includes surface coating, adhesion, mechanical mixing, etc. The positive active material is one or more of lithium iron phosphate, lithium manganese phosphate, lithium silicate, lithium iron silicate, sulfate compounds, sulfur-carbon compounds, elemental sulfur, titanium sulfur compounds, molybdenum sulfur compounds, iron sulfur compounds, doped lithium manganese oxides, lithium cobalt oxides, lithium titanium oxides, lithium vanadium oxides, lithium nickel manganese oxides, lithium nickel cobalt aluminum oxides, lithium nickel cobalt manganese oxides and lithium iron nickel manganese oxides.
The battery case comprises a battery case body and a battery case end cover, wherein two through grooves which are arranged in parallel can be arranged on the upper part of the battery case end cover, the two through grooves are respectively positioned on two opposite sides of the upper part of the rectangular battery case end cover, and a plurality of through holes can be arranged in each through groove at intervals; the lower part of the battery shell end cover can be provided with a boss structure, and the positions of the boss corresponding to the through holes on the upper part of the battery shell end cover can be provided with grooves arranged at intervals, namely, the two opposite sides of the rectangular boss are respectively provided with a plurality of grooves arranged at intervals. When positive pole slurry and electrolyte are injected into the battery core, the battery shell end cover is installed, the battery core is limited through a boss structure at the lower part of the battery shell end cover, a plurality of positive pole lugs are respectively led out from the battery shell through a plurality of grooves on one side of a rectangular boss and a plurality of through holes corresponding to the upper part of the battery shell end cover, a plurality of negative pole lugs are respectively led out from the battery shell through a plurality of grooves on the other side of the rectangular boss and a plurality of through holes corresponding to the upper part of the battery shell end cover, and all the through grooves and the through holes are filled and sealed by sealant. The tab is led out in the mode, so that the operation is convenient, and the sealing performance is good. In addition, a sealing ring can be arranged between the battery shell end cover and the battery core to assist the battery in sealing.
The invention has the advantages that:
1) the detachable lithium slurry battery composite unit is an integrated structure formed by the negative electrode plate provided with the semi-dry slurry state/dry powder state and other battery components, namely the negative electrode sealing frame, the negative electrode lug, the isolation layer and the optional positive electrode current collecting layer and the positive electrode lug, so that the battery can be directly placed in a battery shell during assembly, the problems of insufficient electrochemical reaction or reaction cavity blockage and the like caused by the procedure of injecting viscous negative electrode slurry into a narrow negative electrode cavity are solved, the preparation process of the battery is effectively simplified, the cost is saved, and the cycle performance of the battery is improved.
2) The composite unit of the detachable lithium slurry battery can be directly detached from the battery shell and recovered, and can be replaced by a new composite unit for multiple times, so that the maintenance and regeneration of the battery are facilitated.
3) The positive and negative electrode tabs of the composite unit of the detachable lithium slurry battery can be led out independently through the through grooves and the through holes arranged at intervals on the battery shell, and can be further filled and sealed by sealant, so that the operation is convenient, and the production efficiency of the lithium slurry battery is improved.
Drawings
Fig. 1 is a schematic structural diagram of a composite unit of a detachable lithium paste battery according to the present invention, wherein fig. 1(a) is an exploded schematic diagram of the composite unit of the detachable lithium paste battery, and fig. 1(b) is an assembled schematic diagram of the composite unit of the detachable lithium paste battery;
fig. 2 is a schematic structural view of a lithium paste battery according to the present invention before injecting a positive electrode paste, wherein fig. 2(a) is an exploded schematic view of the lithium paste battery, and fig. 2(b) is a schematic plan view of the lithium paste battery;
fig. 3 (a) - (b) are schematic structural views of a battery case of a lithium paste battery according to various embodiments of the present invention;
fig. 4 is a schematic structural view of a battery case end cap of a lithium paste battery according to the present invention, wherein fig. 4(a) is an upper portion of the battery case end cap, and fig. 4(b) is a lower portion of the battery case end cap.
List of reference numerals
1-composite Unit of Detachable lithium paste Battery
101-negative electrode slice
102-negative pole tab
103-negative pole sealing frame
104-isolation layer
105-positive current collector layer
106-positive pole tab
2-positive pole sealing frame
3-Battery case
301-Battery case end cover
3011 Upper part of Battery case end Cap
3011 a-through groove
3011 b-through hole
3012-lower part of battery case end cap
3012 a-boss
3012 b-groove
302-Battery case
4-sealing ring.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples, but the present invention is not limited to the following examples. The method is a conventional method unless otherwise specified. The starting materials are commercially available from the open literature unless otherwise specified.
Examples 1,
Fig. 1 is a schematic structural view of a composite unit of a detachable lithium paste battery according to the present invention, wherein fig. 1(a) is an exploded schematic view of the composite unit of the detachable lithium paste battery.
As shown in fig. 1(a), the composite unit 1 of the detachable lithium paste battery includes a negative electrode tab 101, a negative electrode tab 102 ("zigzag" shaped copper sheet), a negative electrode sealing frame 103 (polyvinyl chloride zigzag frame each having a thickness of 0.5mm), an isolation layer 104 (polyethylene film), a positive electrode current collecting layer 105 (aluminum mesh, aperture of 100 μm, through-hole porosity of 50%), and a positive electrode tab 106 ("zigzag" shaped aluminum sheet). The negative electrode plate 101 comprises a negative current collecting layer (copper mesh, aperture of 200 μm, and porosity of through hole of 60%) and negative active layers (dry powder negative active conductive particles, solid content of 100%, and stacking porosity of 30%) covering both sides of the negative current collecting layer, wherein the negative active conductive particles are a mixture of negative active material graphite and conductive agent carbon black, the mass ratio is 80:20, the average particle size is 150 μm, and the total thickness of the negative active layers is 0.8 mm. The negative active layer is compounded on two sides of the negative current collecting layer in a mechanical pressing mode. The negative electrode tab 102 is a metal sheet shaped like a Chinese character 'hui', and is in close contact with the peripheral edge of the negative electrode tab 101 through bonding, so that uniform current collection is facilitated. The negative electrode sealing frame is two frames shaped like a Chinese character hui, and the peripheral edges of the outer sides of the negative electrode tab 102 and the negative electrode tab 101 are respectively sealed in an insulating manner. And (3) sequentially laminating an isolating layer 104, a positive current collecting layer 105 and two positive tabs 106 on two sides of the composite structure comprising the negative electrode plate 101, the negative electrode tab 102 and the two negative electrode sealing frames 103 to form the composite unit 1 of the detachable lithium slurry battery.
Fig. 1(b) is an assembly view of a composite unit of a detachable lithium paste battery. As shown in fig. 1(b), the protruding end of the positive electrode tab 106 and the protruding end of the negative electrode tab 102 of the composite unit 1 of the detachable lithium paste battery are respectively disposed at both sides of the composite unit 1 of the detachable lithium paste battery in the Z-axis direction.
Fig. 2 is a schematic structural view of a lithium paste battery according to the present invention before injecting a positive electrode paste, wherein (a) in fig. 2 is an exploded schematic view of the lithium paste battery. The lithium slurry battery comprises a battery core and a battery shell (polytetrafluoroethylene) for accommodating the battery core, wherein the battery core comprises positive electrode slurry (composed of positive electrode active conductive particles and electrolyte, the positive electrode active conductive particles account for 60% of the mass ratio of the positive electrode slurry, the average particle size is 150 mu m, the positive electrode conductive particles are a mixture of positive electrode active material lithium iron phosphate and conductive agent ketjen black, the mass ratio is 70: 30), a positive electrode sealing frame (a polypropylene U-shaped frame body, and the thickness of each frame body is 6mm), and a composite unit of the detachable lithium slurry battery. As shown in fig. 2(a), the composite unit 1 of the detachable lithium paste battery and the positive electrode sealing frame 2 are fixedly mounted in the battery case 3 in an alternate arrangement before the positive electrode paste is injected. The positive electrode sealing frame 2 is a U-shaped frame, the width of the frame body is 3mm, the capacity of a cavity for containing positive electrode slurry is determined, and meanwhile, the composite unit 1 of the detachable lithium slurry battery is limited. The battery case comprises a battery case end cover 301 and a battery case 302, and a sealing ring 4 (fluororubber) is arranged between the battery case end cover 301 and the battery and used for improving the sealing property between the battery core and the battery case.
Fig. 2(b) is a schematic plan view of the lithium paste battery. As shown in fig. 2(b), the negative electrode tab 101, the negative electrode tab 102, the negative electrode sealing frame 103, the isolation layer 104, the positive electrode current collecting layer 105 and the positive electrode tab 106 are stacked in the order of the positive electrode tab 106, the positive electrode current collecting layer 105, the isolation layer 104, the negative electrode sealing frame 103, the negative electrode tab 102, the negative electrode tab 101, the negative electrode sealing frame 103, the isolation layer 104, the positive electrode current collector 105 and the positive electrode tab 106 to form a composite unit of the detachable lithium slurry battery, wherein a negative electrode active layer with a certain thickness is just accommodated in a groove formed between the two negative electrode sealing frames 103 and the negative electrode current collecting layers. The composite unit and the positive sealing frame of the detachable lithium slurry battery are alternately arranged to form the negative part and the positive part, before the battery shell end cover is packaged, the battery core assembly work can be completed as long as positive slurry is injected into the positive part through a battery external slurry injection device, and the process difficulty caused by injecting negative slurry in the traditional battery manufacturing process is reduced.
Fig. 3 (a) - (b) are schematic structural views of a battery case of a lithium paste battery according to various embodiments of the present invention. When the positive electrode sealing frame in the battery cell is provided separately, the battery case 302 is as shown in fig. 3 (a). When the positive electrode sealing frames 2 in the battery cell are integrally formed with the battery case 302 (made of teflon), the battery case 302 is as shown in fig. 3 (b), so that the composite unit of the detachable lithium paste battery of the present invention can be accommodated in the cavity between the two positive electrode sealing frames 2.
Fig. 4 is a schematic structural view of a battery case end cap of a lithium paste battery according to the present invention, wherein (a) in fig. 4 is an upper portion of the battery case end cap, and (b) in fig. 4 is a lower portion of the battery case end cap. As shown in fig. 4(a), two through slots 3011a arranged in parallel are disposed on the upper portion 3011 of the end cover of the battery case, the two through slots are respectively located on two opposite sides of the upper portion 3011 of the end cover of the rectangular battery case, and a plurality of through holes 3011b are disposed in each through slot 3011a at intervals and used for separately leading out a positive electrode tab or a negative electrode tab from the through hole 3011 b. As shown in fig. 4(b), a boss structure 3012a is disposed at the lower portion 3012 of the end cap of the battery case, and when the end cap of the battery case is sealed, the boss structure plays a role in limiting the battery cell. Grooves 3012b are disposed at positions corresponding to the boss structure 3012a and the plurality of tabs 3011b at intervals, so that the plurality of positive electrode tabs or negative electrode tabs respectively extend out of the battery case end cover through the grooves 3012b and 3011b, that is, each positive electrode tab or negative electrode tab is separately led out, and the through grooves 3011a and 3011b are filled and sealed by sealant.
The specific embodiments of the present invention are not intended to be limiting of the invention. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments, using the methods and techniques disclosed above, without departing from the scope of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (3)
1. A detachable lithium paste battery composite unit is characterized in that: the composite unit of the detachable lithium slurry battery comprises a negative electrode sealing frame, a negative electrode plate, a negative electrode lug and an isolating layer;
the negative electrode plate comprises a negative current collecting layer and negative active layers covering two sides of the negative current collecting layer;
the negative electrode sealing frame, the negative electrode plate, the negative electrode tab and the isolation layer are sequentially stacked according to the sequence of the isolation layer, the negative electrode sealing frame, the negative electrode tab, the negative electrode plate, the other negative electrode sealing frame and the other isolation layer;
the negative active layer is negative active conductive particles in a semi-dry slurry state or a dry powder state; the negative active conductive particles are a conductive agent or a composite or mixture of a negative active material and a conductive agent; the solid content of the negative active conductive particles is 40-100%; the mass ratio of the negative electrode active material to the conductive agent is 20-98: 80-2;
the composite unit of the detachable lithium slurry battery also comprises a positive electrode current collecting layer and a positive electrode lug arranged on one side of the positive electrode current collecting layer, wherein the side, which is not provided with the positive electrode lug, of the positive electrode current collecting layer is composited on the outer side of the isolating layer;
the negative electrode sealing frame, the negative electrode tab and the negative electrode plate are fixed with each other in a welding, bonding or pressure clamping manner; the positive pole lug and the positive pole current collecting layer are fixed in a welding, bonding or pressure clamping mode.
2. A lithium paste battery characterized in that: the lithium paste battery comprises a composite unit of the detachable lithium paste battery according to claim 1.
3. The lithium paste battery according to claim 2, wherein: the lithium slurry battery comprises a battery cell and a battery shell for accommodating the battery cell;
the battery cell comprises a positive electrode sealing frame and a composite unit of the detachable lithium paste battery in claim 1;
the positive electrode sealing frame is independently arranged or integrally formed with the inner cavity of the battery shell;
the composite unit of the detachable lithium slurry battery and the positive electrode sealing frame are alternately stacked to form a negative electrode part and a positive electrode part.
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| CN111816874B (en) * | 2020-06-24 | 2022-06-17 | 中国科学院过程工程研究所 | Preparation method of positive active material of lithium slurry battery |
| CN116759652B (en) * | 2023-08-16 | 2023-10-27 | 江苏天合储能有限公司 | Bare cell, lithium battery, manufacturing process of bare cell and manufacturing process of lithium battery |
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