CN108695485B - Maintenance regeneration equipment and method for lithium slurry battery - Google Patents
Maintenance regeneration equipment and method for lithium slurry battery Download PDFInfo
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- CN108695485B CN108695485B CN201710224927.7A CN201710224927A CN108695485B CN 108695485 B CN108695485 B CN 108695485B CN 201710224927 A CN201710224927 A CN 201710224927A CN 108695485 B CN108695485 B CN 108695485B
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- liquid
- gas
- lithium
- battery
- lithium slurry
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 367
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 366
- 239000002002 slurry Substances 0.000 title claims abstract description 275
- 238000012423 maintenance Methods 0.000 title claims abstract description 118
- 238000011069 regeneration method Methods 0.000 title claims abstract description 114
- 230000008929 regeneration Effects 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims description 41
- 239000007788 liquid Substances 0.000 claims abstract description 459
- 238000003860 storage Methods 0.000 claims abstract description 70
- 238000002347 injection Methods 0.000 claims abstract description 60
- 239000007924 injection Substances 0.000 claims abstract description 60
- 238000011084 recovery Methods 0.000 claims abstract description 37
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 239000007789 gas Substances 0.000 claims description 432
- 239000003570 air Substances 0.000 claims description 101
- 239000003792 electrolyte Substances 0.000 claims description 47
- 238000004140 cleaning Methods 0.000 claims description 33
- 230000008569 process Effects 0.000 claims description 23
- 239000000654 additive Substances 0.000 claims description 21
- 238000012806 monitoring device Methods 0.000 claims description 20
- 230000000996 additive effect Effects 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 15
- 230000001172 regenerating effect Effects 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 10
- 210000001503 joint Anatomy 0.000 claims description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical group O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 4
- RDOXTESZEPMUJZ-UHFFFAOYSA-N anisole Chemical compound COC1=CC=CC=C1 RDOXTESZEPMUJZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 3
- 150000002576 ketones Chemical class 0.000 claims description 3
- 229910003002 lithium salt Inorganic materials 0.000 claims description 3
- 159000000002 lithium salts Chemical class 0.000 claims description 3
- 239000007773 negative electrode material Substances 0.000 claims description 3
- 210000002445 nipple Anatomy 0.000 claims description 3
- 239000007774 positive electrode material Substances 0.000 claims description 3
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 claims description 2
- 229910018503 SF6 Inorganic materials 0.000 claims description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 2
- 239000001569 carbon dioxide Substances 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 2
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 2
- UZKWTJUDCOPSNM-UHFFFAOYSA-N methoxybenzene Substances CCCCOC=C UZKWTJUDCOPSNM-UHFFFAOYSA-N 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 125000000475 sulfinyl group Chemical group [*:2]S([*:1])=O 0.000 claims description 2
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims description 2
- 229960000909 sulfur hexafluoride Drugs 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000012459 cleaning agent Substances 0.000 claims 3
- 238000004064 recycling Methods 0.000 claims 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims 1
- 239000013589 supplement Substances 0.000 abstract description 6
- 238000005303 weighing Methods 0.000 description 11
- 239000008151 electrolyte solution Substances 0.000 description 8
- -1 polytetrafluoroethylene Polymers 0.000 description 7
- 238000007086 side reaction Methods 0.000 description 6
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 239000007772 electrode material Substances 0.000 description 3
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- WDXYVJKNSMILOQ-UHFFFAOYSA-N 1,3,2-dioxathiolane 2-oxide Chemical compound O=S1OCCO1 WDXYVJKNSMILOQ-UHFFFAOYSA-N 0.000 description 2
- SJHAYVFVKRXMKG-UHFFFAOYSA-N 4-methyl-1,3,2-dioxathiolane 2-oxide Chemical compound CC1COS(=O)O1 SJHAYVFVKRXMKG-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000006258 conductive agent Substances 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- FKRCODPIKNYEAC-UHFFFAOYSA-N ethyl propionate Chemical compound CCOC(=O)CC FKRCODPIKNYEAC-UHFFFAOYSA-N 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- FSSPGSAQUIYDCN-UHFFFAOYSA-N 1,3-Propane sultone Chemical compound O=S1(=O)CCCO1 FSSPGSAQUIYDCN-UHFFFAOYSA-N 0.000 description 1
- HNAGHMKIPMKKBB-UHFFFAOYSA-N 1-benzylpyrrolidine-3-carboxamide Chemical compound C1C(C(=O)N)CCN1CC1=CC=CC=C1 HNAGHMKIPMKKBB-UHFFFAOYSA-N 0.000 description 1
- PCYBDHWNMPLUSI-UHFFFAOYSA-N 2,2,2-trifluoroethylphosphonic acid Chemical compound OP(O)(=O)CC(F)(F)F PCYBDHWNMPLUSI-UHFFFAOYSA-N 0.000 description 1
- JWUJQDFVADABEY-UHFFFAOYSA-N 2-methyltetrahydrofuran Chemical compound CC1CCCO1 JWUJQDFVADABEY-UHFFFAOYSA-N 0.000 description 1
- LFJJGHGXHXXDFT-UHFFFAOYSA-N 3-bromooxolan-2-one Chemical compound BrC1CCOC1=O LFJJGHGXHXXDFT-UHFFFAOYSA-N 0.000 description 1
- XOUIPIUHGJBZFX-UHFFFAOYSA-N 4,4,5,5-tetramethyl-1,3-dioxolane Chemical compound CC1(C)OCOC1(C)C XOUIPIUHGJBZFX-UHFFFAOYSA-N 0.000 description 1
- FPBJCOIQZLWHFK-UHFFFAOYSA-N 4,4-difluoro-5-methyl-1,3-dioxolan-2-one Chemical compound CC1OC(=O)OC1(F)F FPBJCOIQZLWHFK-UHFFFAOYSA-N 0.000 description 1
- GKZFQPGIDVGTLZ-UHFFFAOYSA-N 4-(trifluoromethyl)-1,3-dioxolan-2-one Chemical compound FC(F)(F)C1COC(=O)O1 GKZFQPGIDVGTLZ-UHFFFAOYSA-N 0.000 description 1
- OYOKPDLAMOMTEE-UHFFFAOYSA-N 4-chloro-1,3-dioxolan-2-one Chemical compound ClC1COC(=O)O1 OYOKPDLAMOMTEE-UHFFFAOYSA-N 0.000 description 1
- SBLRHMKNNHXPHG-UHFFFAOYSA-N 4-fluoro-1,3-dioxolan-2-one Chemical compound FC1COC(=O)O1 SBLRHMKNNHXPHG-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- PLUBXMRUUVWRLT-UHFFFAOYSA-N Ethyl methanesulfonate Chemical compound CCOS(C)(=O)=O PLUBXMRUUVWRLT-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- JGFBQFKZKSSODQ-UHFFFAOYSA-N Isothiocyanatocyclopropane Chemical compound S=C=NC1CC1 JGFBQFKZKSSODQ-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- OBNCKNCVKJNDBV-UHFFFAOYSA-N butanoic acid ethyl ester Natural products CCCC(=O)OCC OBNCKNCVKJNDBV-UHFFFAOYSA-N 0.000 description 1
- LFLBHTZRLVHUQC-UHFFFAOYSA-N butyl methanesulfonate Chemical compound CCCCOS(C)(=O)=O LFLBHTZRLVHUQC-UHFFFAOYSA-N 0.000 description 1
- PWLNAUNEAKQYLH-UHFFFAOYSA-N butyric acid octyl ester Natural products CCCCCCCCOC(=O)CCC PWLNAUNEAKQYLH-UHFFFAOYSA-N 0.000 description 1
- 238000006757 chemical reactions by type Methods 0.000 description 1
- 239000011246 composite particle Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- NVJBFARDFTXOTO-UHFFFAOYSA-N diethyl sulfite Chemical compound CCOS(=O)OCC NVJBFARDFTXOTO-UHFFFAOYSA-N 0.000 description 1
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 1
- NKDDWNXOKDWJAK-UHFFFAOYSA-N dimethoxymethane Chemical compound COCOC NKDDWNXOKDWJAK-UHFFFAOYSA-N 0.000 description 1
- BDUPRNVPXOHWIL-UHFFFAOYSA-N dimethyl sulfite Chemical compound COS(=O)OC BDUPRNVPXOHWIL-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003759 ester based solvent Substances 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- WBJINCZRORDGAQ-UHFFFAOYSA-N formic acid ethyl ester Natural products CCOC=O WBJINCZRORDGAQ-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- XMJHPCRAQCTCFT-UHFFFAOYSA-N methyl chloroformate Chemical compound COC(Cl)=O XMJHPCRAQCTCFT-UHFFFAOYSA-N 0.000 description 1
- KKQAVHGECIBFRQ-UHFFFAOYSA-N methyl propyl carbonate Chemical compound CCCOC(=O)OC KKQAVHGECIBFRQ-UHFFFAOYSA-N 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 description 1
- UUIQMZJEGPQKFD-UHFFFAOYSA-N n-butyric acid methyl ester Natural products CCCC(=O)OC UUIQMZJEGPQKFD-UHFFFAOYSA-N 0.000 description 1
- MHYFEEDKONKGEB-UHFFFAOYSA-N oxathiane 2,2-dioxide Chemical compound O=S1(=O)CCCCO1 MHYFEEDKONKGEB-UHFFFAOYSA-N 0.000 description 1
- 229940090181 propyl acetate Drugs 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 239000003586 protic polar solvent Substances 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 150000003459 sulfonic acid esters Chemical class 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 description 1
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 description 1
- WVLBCYQITXONBZ-UHFFFAOYSA-N trimethyl phosphate Chemical compound COP(=O)(OC)OC WVLBCYQITXONBZ-UHFFFAOYSA-N 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/691—Arrangements or processes for draining liquids from casings; Cleaning battery or cell casings
-
- 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
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4242—Regeneration of electrolyte or reactants
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/52—Removing gases inside the secondary cell, e.g. by absorption
-
- 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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
-
- 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
Abstract
The present invention provides a maintenance regeneration apparatus for a lithium paste battery, the maintenance regeneration apparatus including: an air tap capable of being connected to or disconnected from an air port of the lithium paste battery; a liquid nozzle capable of being connected to or disconnected from a liquid port of the lithium paste battery; the gas recovery device is connected to the gas nozzle through a first gas pipeline; the gas storage tank is connected to the gas nozzle through a second gas pipeline; the liquid recovery device is connected to the liquid nozzle through a first liquid pipeline; the liquid storage tank is connected to the liquid nozzle through a second liquid pipeline; and control valves disposed in each of the gas lines and the liquid lines. The invention also provides a maintenance and regeneration method of the lithium slurry battery. The maintenance regeneration equipment and the maintenance regeneration method of the lithium slurry battery can perform liquid injection, liquid supplement, liquid replacement, gas injection and gas exhaust on the lithium slurry battery, thereby improving the service performance, safety and sealing property of the battery, prolonging the service life of the battery and realizing the maintenance and regeneration of the lithium slurry battery.
Description
Technical Field
The invention relates to the field of lithium slurry batteries, in particular to a maintenance regeneration device and a maintenance regeneration method of a lithium slurry battery.
Background
The lithium slurry battery is a novel high-energy battery, the conductive slurry in the electrode plate contains conductive particles which are suspended or precipitated in electrolyte in a certain proportion, when the battery is impacted or vibrated externally, the conductive particles can move in the electrolyte and form a dynamic conductive network because the conductive particles are not bonded and fixed, and the conductive particles can only contain a conductive agent or can be composite particles of an active material and the conductive agent. The conductive paste in the lithium paste battery can avoid the problems of battery capacity reduction and cycle life attenuation caused by falling or loosening of the electrode material of the traditional lithium battery.
However, the lithium paste battery may have the following problems during long-term use: (1) side reactions generated in the using process of the lithium slurry battery can cause the gradual failure of electrolyte, and an SEI (solid electrolyte interphase) film generated on the surface of an electrode active material and even a current collector due to the side reactions can be thickened continuously, so that the internal resistance of the lithium slurry battery is increased, and the cycle life of the lithium slurry battery is shortened; (2) electrolyte is consumed by side reactions generated in the using process of the lithium slurry battery, so that too little electrolyte participating in electrochemical reaction in the battery is generated, the conduction of lithium ions in the battery is influenced, and the performance of the battery is reduced; (3) when the lithium slurry battery is used, on one hand, the battery is over-charged and over-discharged or side reactions occur, which may cause the battery to expand and cause the air pressure in the shell to be higher, and on the other hand, the air pressure in the battery shell is reduced due to long-term use, so that the air sealing effect cannot be achieved, and the safety and the sealing performance of the battery are reduced. Based on the characteristics of the lithium slurry battery, the service life of the battery can be prolonged and the performance of the battery can be improved in a maintenance and regeneration mode.
Disclosure of Invention
In view of the above problems, the present invention provides a maintenance regeneration apparatus and a maintenance regeneration method for a lithium slurry battery. The maintenance regeneration equipment and the maintenance regeneration method of the lithium slurry battery can perform liquid injection, liquid supplement, liquid replacement, gas injection and gas exhaust on the lithium slurry battery, thereby improving the service performance, safety and sealing property of the battery, prolonging the service life of the battery and realizing the maintenance and regeneration of the lithium slurry battery.
The technical scheme provided by the invention is as follows:
according to the present invention, there is provided a maintenance regeneration apparatus for a lithium slurry battery including a gas port and a liquid port capable of fluid communication with the inside of a lithium slurry battery case, the maintenance regeneration apparatus comprising: an air tap which can be connected with or disconnected from an air port of the lithium paste battery; a liquid nozzle capable of being connected or disconnected with a liquid port of the lithium paste battery; the gas recovery device is connected to the gas nozzle through a first gas pipeline and a gas main pipe; the first gas control valve is arranged on the first gas pipeline and can enable gas in the lithium slurry battery to enter the gas recovery device through the gas nozzle, the gas header pipe and the first gas pipeline; the gas storage tank is connected to the gas nozzle through a second gas pipeline and a gas main pipe; the second gas control valve is arranged on the second gas pipeline and can enable gas in the gas storage tank to enter the lithium slurry battery through the second gas pipeline, the gas main pipe and the gas nozzle; the liquid recovery device is connected with the liquid nozzle through a first liquid pipeline and a liquid header pipe; the first liquid control valve is arranged on the first liquid pipeline and can enable liquid in the lithium slurry battery to enter the liquid recovery device through the liquid nozzle, the liquid header pipe and the first liquid pipeline; a liquid storage tank connected to the liquid nozzle through a second liquid line and a liquid header; and the second liquid control valve is arranged on the second liquid pipeline and can enable the liquid in the liquid storage tank to enter the lithium slurry battery through the second liquid pipeline, the liquid header pipe and the liquid nozzle.
The shell of the lithium slurry battery is provided with a battery cell or the shell of the lithium slurry battery is provided with one or more soft-packaged/hard-packaged battery monomers. The interior of the lithium slurry battery can be communicated with external gas through a gas port on the shell; the interior of the lithium paste battery can be in fluid communication with the exterior through a fluid port in the housing. Depending on the specific structure of the lithium paste battery, the inside of the case of the lithium paste battery may be made to be in fluid communication with the outside via the gas port, the liquid port, and the corresponding piping, or the inside of the cell case of the lithium paste battery may be made to be in fluid communication with the outside via the gas port, the liquid port, and the corresponding piping. And an air nozzle and a liquid nozzle of the maintenance regeneration equipment can be respectively connected with an air port and a liquid port on the lithium slurry battery shell in a sealing manner. For example, the air port and the liquid port may be circular openings, and the air nozzle and the liquid nozzle may be cones with surfaces coated with elastic materials, and the air nozzle and the liquid nozzle can be respectively inserted into the air port and the liquid port to be tightly jointed and can be quickly pulled out. Or for example, the air port and the liquid port can be cylindrical protrusions with through holes at the centers, and the air nozzle and the liquid nozzle can be elastic sleeves, and the air nozzle and the liquid nozzle can be sleeved on the air port and the liquid port respectively to be tightly jointed and can be quickly taken down. The embodiments of the gas port, liquid port, gas nozzle and liquid nozzle are not limited to the above-described embodiments as long as the gas nozzle and liquid nozzle of the maintenance device are easily engaged with and disengaged from the gas port and liquid port of the lithium paste battery.
The materials of the gas storage tank, the liquid storage tank, the gas recovery device and the liquid recovery device of the lithium slurry battery maintenance regeneration equipment can be metal materials or insulating electrolyte-resistant materials, the metal materials can be stainless steel, aluminum and the like, and the insulating electrolyte-resistant materials can be polytetrafluoroethylene, polypropylene, polyethylene and the like. The gas storage tank is stored with dry gas, the dry gas can be one or a mixture of nitrogen, air, inert gas and sulfur hexafluoride, and preferably, the water content of the dry gas is less than or equal to 0.1 ppm. The first gas line, the second gas line, the first liquid line, the second liquid line, the gas manifold and the liquid manifold may be rigid tubes or flexible tubes, and the material thereof may be, for example, stainless steel, aluminum, polytetrafluoroethylene, polypropylene, polyethylene, etc. The first gas control valve, the second gas control valve, the first liquid control valve and the second liquid control valve may be flow control valves, and preferably the control valves are check valves.
The liquid reservoir may simply be an electrolyte reservoir. Alternatively, the liquid reservoir may comprise a plurality of reservoirs, for example: the electrolyte solution storage tank comprises a first electrolyte solution storage tank, a cleaning solution storage tank and a second electrolyte solution storage tank, wherein the first electrolyte solution storage tank stores electrolyte solution, the cleaning solution storage tank stores cleaning solution, and the second electrolyte solution storage tank stores electrolyte solution containing SEI film stabilizing and repairing additives. The first electrolyte storage tank, the cleaning solution storage tank and the second electrolyte storage tank can be respectively communicated with the second liquid pipeline through a switching valve or a plurality of liquid control valves. The electrolyte is a mixture of lithium salt and a solvent, the lithium salt is lithium hexafluorophosphate, and the solvent can be Ethylene Carbonate (EC), diethyl carbonate (DEC), dimethyl carbonate (DMC), Ethyl Methyl Carbonate (EMC) or the like; the cleaning solution can be esters and carbonate derivatives, ethers and ketones. Specifically, the ester-based solvent includes ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, propyl methyl carbonate, methyl formate, ethyl formate, methyl acetate, ethyl acetate, propyl acetate, ethyl propionate, methyl butyrate, ethyl butyrate, ethylene sulfite, propylene sulfite, trimethyl phosphate, triethyl phosphate, tributyl phosphate, and the like; the carbonate derivatives include chloroethylene carbonate, fluoroethylene carbonate, difluoropropylene carbonate, trifluoropropylene carbonate and the like; the ether solvent includes dimethoxymethane, 1, 2-dimethoxyethane, tetrahydrofuran, dimethyltetrahydrofuran, diethylene glycol dimethyl ether, tetramethyl-1, 3-dioxolane, etc.; the ketone solvent includes acetone and the like. The SEI film stabilizing and repairing additive may be one or more of the following additives: sulfinyl additives, for example: ethylene sulfite, propylene sulfite, dimethyl sulfite, diethyl sulfite, dimethyl sulfoxide, and the like; sulfonic acid ester additives such as 1, 3-propane sultone, 1, 4-butane sultone, ethyl methanesulfonate, butyl methanesulfonate and the like; vinylene carbonate; anisole or its halogenated derivatives; halogenated organics such as halogenated EC, trifluoroethyl phosphonic acid, methyl chloroformate, bromobutyrolactone, fluoroacetoxyethane, and the like; inorganic additives such as sulfur dioxide, carbon dioxide, lithium carbonate, and the like. The additive is used in combination with the electrolyte and accounts for 0.1-5% of the electrolyte. In addition, the liquid storage tank may further include an SEI film reactive type breaking agent storage tank. The SEI film reaction type breaking agent is, for example, an active hydrogen-containing protic solvent such as an acid, an alcohol, or an amine.
The maintenance regeneration equipment can comprise a vacuum-pumping device which is arranged on the first gas pipeline and can be used for vacuumizing the lithium slurry battery through a gas nozzle. When the control device or the first gas control valve is manually opened, the gas in the lithium slurry battery can be pumped into the gas recovery device by the vacuumizing device through the gas port of the lithium slurry battery and the gas nozzle of the maintenance regeneration equipment. The maintenance regeneration device may further include a first liquid pump that is provided in the first liquid line and is capable of drawing the liquid in the lithium-slurry battery via a liquid nozzle. When the control device or the first liquid control valve is opened manually, the liquid in the lithium slurry battery can be pumped into the liquid recovery device by the first liquid pump through a liquid port of the lithium slurry battery and a liquid nozzle of the maintenance regeneration device.
The maintenance and regeneration equipment can comprise a gas driving device, wherein the gas driving device is arranged on the second gas pipeline and is connected to the liquid storage tank through a gas driving pipeline, the gas driving device can drive gas in the gas storage tank to enter the lithium slurry battery through a gas nozzle and a gas port of the lithium slurry battery and can drive gas in the gas storage tank to enter the liquid storage tank and further drive liquid in the liquid storage tank to enter the lithium slurry battery through a liquid nozzle and a liquid port of the lithium slurry battery. When the control device or the second gas control valve is manually opened, the gas in the gas storage tank can be pumped into the lithium slurry battery by the gas driving device through the gas nozzle and the gas port of the lithium slurry battery. When the control device or the control valve on the manual opening second liquid control valve and the gas drive pipeline, can utilize gas drive device to pump the gas in the gas storage tank to the liquid storage tank, and then the liquid in the liquid storage tank is pushed to the lithium slurry battery through the liquid mouth and the liquid mouth of lithium slurry battery. That is, both the gas in the gas tank and the liquid in the liquid tank can be pumped by the gas driving device. In another embodiment, the maintenance regeneration device comprises a gas driving device and a second liquid pump, the gas driving device is arranged on the second gas pipeline, the gas driving device can drive gas in the gas storage tank to enter the lithium slurry battery through the gas nozzle and the gas port of the lithium slurry battery, the second liquid pump is arranged on the second liquid pipeline, and the second liquid pump can drive liquid in the liquid storage tank to enter the lithium slurry battery through the liquid nozzle and the liquid port of the lithium slurry battery. When the control device or the second gas control valve is manually opened, the gas in the gas storage tank can be pumped into the lithium slurry battery by the gas driving device through the gas nozzle and the gas port of the lithium slurry battery. When the control device or the second liquid control valve is manually opened, the liquid in the liquid storage tank can be pumped into the lithium slurry battery by the second liquid pump through the liquid nozzle and the liquid port of the lithium slurry battery. That is, the delivery of the gas in the gas tank and the liquid in the liquid tank is accomplished by the gas driving device and the second liquid pump, respectively.
The maintenance regeneration equipment may further include a third gas line, the third gas line and the gas manifold connecting the gas tap to the gas recovery device. And a third gas control valve can be arranged on the third gas pipeline, and when the gas pressure in the lithium slurry battery is greater than the preset gas pressure, the gas in the lithium slurry battery can enter the gas recovery device through the gas nozzle, the gas main pipe, the third gas pipeline and the third gas control valve. The third gas control valve can be an exhaust valve and is automatically opened and closed through the gas pressure in the third gas pipeline; alternatively, the third gas control valve may be an electronically controlled valve that is opened and closed by a control device or manually by sensing the gas pressure in the third gas line. In addition, in the case where the third gas line is not provided, the gas exceeding the predetermined gas pressure value in the lithium slurry battery may be introduced into the gas recovery device through the first gas line and the first gas control valve. During the use of the lithium paste battery, the gas pressure in the lithium paste battery will rise due to overcharge and overdischarge of the lithium paste battery cells, volatilization of the electrolyte and the like. The gas in the lithium slurry battery is discharged in time, so that unsafe conditions such as explosion and the like of the lithium slurry battery caused by overlarge internal pressure can be effectively prevented. The predetermined pressure range in the lithium paste battery may be determined according to actual needs, and may be, for example, 0.15MPa to 0.5 MPa.
A gas pressure gauge may be provided in the gas manifold to detect the gas pressure in the gas manifold. One end of the gas main pipe is connected with the gas nozzle, and the other end of the gas main pipe can be connected with the first gas pipeline, the second gas pipeline and the third gas pipeline through the four-way joint. A hydraulic gauge may be provided in the liquid main for sensing the hydraulic pressure in the liquid main. One end of the liquid main pipe is connected with the liquid nozzle, and the other end of the liquid main pipe can be connected with the first liquid pipeline and the second liquid pipeline through the three-way joint.
The maintenance regeneration apparatus may further include a vibration heating device by which the lithium paste battery can be vibration heated to clean the lithium paste battery or remove the SEI film. In the long-term use process of the lithium slurry battery, the electrolyte can lose efficacy gradually due to the occurrence of side reactions, and the SEI film generated by the side reactions on the surface of the electrode active material, even the current collector, can be thickened continuously, which can cause the increase of the internal resistance of the lithium slurry battery and the reduction of the cycle life. In order to destroy the SEI film, the SEI film may be removed by a high temperature treatment, ultrasonic heating, or the like of the lithium paste battery using a vibration heating apparatus. In addition, in the process of replacing the liquid of the lithium slurry battery, the lithium slurry battery is cleaned through multiple times of vacuumizing, liquid injection and liquid drainage. In order to clean the lithium paste battery more thoroughly, the lithium paste battery can be vibrated and heated by a vibration heating device in the cleaning process.
The maintenance and regeneration equipment also comprises a weighing device, and the weighing device can be used for weighing the lithium slurry battery before and after liquid injection, so that the injection amount of the lithium slurry battery can be accurately obtained. The maintenance/regeneration facility can accurately grasp the amount of liquid injection by controlling the amount of liquid injection, detecting by a sensor, or the like.
The maintenance regeneration equipment can also comprise a formation device, and a positive electrode connector and a negative electrode connector of the formation device can be electrically connected with a positive electrode terminal and a negative electrode terminal of the lithium slurry battery and can charge and discharge the lithium slurry battery. Through the formation device, the lithium slurry battery can be fully discharged before the liquid of the lithium slurry battery is changed. In addition, the formation device can also be used for removing the SEI film of the lithium paste battery by using methods such as high-temperature repeated charge and discharge, large-current charge and discharge, high-potential over charge and discharge and the like.
The maintenance regeneration apparatus may further include a monitoring device for monitoring the voltage, temperature, and the like of the lithium slurry battery during the maintenance regeneration of the lithium slurry battery. When the lithium slurry battery is in the online maintenance process of gas injection, gas exhaust, liquid supplement and the like, the maintenance regeneration equipment monitors the voltage and temperature states of the battery to be maintained in real time, and if the detected voltage or temperature has deviation, the maintenance regeneration equipment immediately alarms and stops the battery maintenance work.
The maintenance regeneration equipment also comprises a control device, and the control device can control the opening and closing of the first gas control valve, the second gas control valve, the third gas control valve, the first liquid control valve, the second liquid control valve, the vacuum pumping device, the gas driving device, the first liquid pump, the second liquid pump, the vibration heating device, the formation device and the monitoring device. In addition, the maintenance regeneration equipment can be provided with a control panel, and the control device can be operated and the manual operation of each control valve and each device can be realized through the control panel.
The invention also provides a maintenance and regeneration method of the lithium slurry battery, which utilizes the maintenance and regeneration equipment of the lithium slurry battery to perform maintenance operations such as liquid injection, liquid supplement, gas injection and exhaust on the lithium slurry battery with a gas port and a liquid port and regeneration operations such as liquid replacement on the lithium slurry battery.
In the method for maintaining and regenerating a lithium slurry battery, the electrolyte injection process may include the steps of: (1) butt joint of gas and liquid ports: butting and sealing an air nozzle and a liquid nozzle of the maintenance regeneration equipment with an air port and a liquid port of the lithium slurry battery; (2) vacuumizing: opening a vacuumizing device and a first gas control valve, vacuumizing the lithium slurry battery through an air nozzle, and closing the vacuumizing device and the first gas control valve; (3) liquid injection: starting the gas driving device/the second liquid pump and the second liquid control valve, injecting the lithium slurry battery through the liquid nozzle, and closing the gas driving device/the second liquid pump and the second liquid control valve when the lithium slurry battery is filled with the electrolyte; (4) alternately vacuumizing and injecting liquid: repeating the steps (2) - (3) for 3-5 times; (5) and (4) finishing injection: and pulling the air nozzle and the liquid nozzle out of the air port and the liquid port of the lithium slurry battery, and sealing the air port and the liquid port of the lithium slurry battery. Through the steps, the initial liquid injection of the lithium slurry battery can be realized.
In addition, the lithium slurry battery can be weighed in the process of injecting the lithium slurry battery, so that the lithium slurry battery can be accurately injected. In particular toIn the step (1), before the air nozzle and the liquid nozzle of the maintenance regeneration equipment are butted with the air port and the liquid port of the lithium paste battery, the weight m of the lithium paste battery which is not injected with liquid is recorded by a weighing device1In the above step (5), after the air nozzle and the liquid nozzle are pulled out from the air port and the liquid port of the lithium paste battery, the weight m of the lithium paste battery in which the liquid injection has been completed is recorded by the weighing device2The amount of injected lithium paste is calculated from the difference in weight between the lithium paste batteries before and after the injection.
In addition, in order to fully infiltrate the battery cells in the lithium slurry battery or the battery cells in the single body, in the step (3), after the lithium slurry battery is filled with the electrolyte, the gas driving device and the second gas control valve may be opened to pressurize the interior of the lithium slurry battery and the lithium slurry battery may be left to stand. The pressurization pressure may be, for example, 0.2MPa to 0.5MPa, and the standing time may be, for example, 3 to 60 seconds.
In the method for maintaining and regenerating the lithium slurry battery, the liquid replenishing process may include the steps of: (1) butt joint of gas and liquid ports: butting and sealing an air nozzle and a liquid nozzle of the maintenance regeneration equipment with an air port and a liquid port of the lithium slurry battery, and starting a monitoring device of the maintenance regeneration equipment to monitor the voltage and the temperature of the lithium slurry battery; (2) vacuumizing: opening a vacuumizing device and a first gas control valve, vacuumizing the lithium slurry battery through an air nozzle, and closing the vacuumizing device and the first gas control valve; (3) liquid injection: starting the gas driving device/the second liquid pump and the second liquid control valve, injecting the lithium slurry battery through the liquid nozzle, and closing the gas driving device/the second liquid pump and the second liquid control valve when the lithium slurry battery is filled with the electrolyte; (4) alternately vacuumizing and injecting liquid: repeating the steps (2) - (3) for 3-5 times; (5) and (4) finishing injection: and closing the monitoring device, pulling out the air nozzle and the liquid nozzle from the air port and the liquid port of the lithium slurry battery, and sealing the air port and the liquid port of the lithium slurry battery. It can be seen that, the liquid injection process and the liquid replenishing process both include the step of alternately vacuumizing and injecting liquid for a plurality of times, because bubbles may exist in the lithium slurry battery after liquid injection, and the existence of the bubbles will affect the performance of the lithium slurry battery, so that the bubbles in the electrolyte of the lithium slurry battery are pumped out in a way of vacuumizing above the liquid level of the electrolyte, which is beneficial to filling the whole lithium slurry battery with liquid through further liquid injection.
In the method for maintaining and regenerating the lithium slurry battery, the liquid changing process may include the steps of: (1) discharging: discharging the lithium slurry battery to zero charge capacity; (2) butt joint of gas and liquid ports: butting and sealing an air nozzle and a liquid nozzle of the maintenance regeneration equipment with an air port and a liquid port of the lithium slurry battery; (3) liquid drainage: simultaneously opening a gas driving device, a second gas control valve, a first liquid pump and a first liquid control valve to discharge the electrolyte in the lithium slurry battery to a liquid recovery device through a liquid nozzle, and closing the gas driving device, the second gas control valve, the first liquid pump and the first liquid control valve after the liquid discharge is finished; (4) liquid injection and cleaning: a. vacuumizing: opening a vacuumizing device and a first gas control valve, vacuumizing the lithium slurry battery through an air nozzle, and closing the vacuumizing device and the first gas control valve; b. injecting a cleaning solution: switching the liquid storage tank to a cleaning liquid storage tank, starting the gas driving device/the second liquid pump and a second liquid control valve, injecting cleaning liquid into the lithium slurry battery through the liquid nozzle, and closing the gas driving device/the second liquid pump and the second liquid control valve when the cleaning liquid is filled in the lithium slurry battery; c. supercharging: starting a gas driving device and a second gas control valve to pressurize the interior of the lithium slurry battery; d. cleaning: heating and vibrating the lithium slurry battery, thereby fully cleaning the lithium slurry battery; (5) alternately discharging liquid and injecting liquid for cleaning: repeating the steps (3) to (4) for 1-5 times; (6) liquid drainage: simultaneously opening a gas driving device, a second gas control valve, a first liquid pump and a first liquid control valve to discharge cleaning liquid in the lithium slurry battery to a liquid recovery device through a liquid nozzle, and closing the gas driving device, the second gas control valve, the first liquid pump and the first liquid control valve after liquid discharge is finished; (7) and (4) secondary liquid injection: a. vacuumizing: opening a vacuumizing device and a first gas control valve, vacuumizing the lithium slurry battery through an air nozzle, and closing the vacuumizing device and the first gas control valve; b. liquid injection: switching the liquid storage tank to an electrolyte storage tank, starting the gas driving device/the second liquid pump and starting the second liquid control valve, injecting electrolyte into the lithium slurry battery through the liquid nozzle, and closing the gas driving device/the second liquid pump and closing the second liquid control valve when the lithium slurry battery is fully injected with the electrolyte; c. supercharging: starting a gas driving device and a second gas control valve to pressurize the interior of the lithium slurry battery; (8) and (5) finishing liquid change: and pulling the air nozzle and the liquid nozzle out of the air port and the liquid port of the lithium slurry battery, and sealing the air port and the liquid port of the lithium slurry battery. Through the steps, the liquid can be changed for the lithium slurry battery used for a period of time. By replacing the liquid for the lithium slurry battery, the service life of the battery can be effectively prolonged, and the performance of the battery can be improved.
In addition, a step of breaking the SEI film and repairing the SEI film may be included in a liquid replacement process of the lithium paste battery. Specifically, after the lithium slurry battery is discharged in the step (1), the SEI film on the surfaces of the positive and negative electrode materials and the current collector of the lithium slurry battery can be damaged by high-temperature treatment, ultrasonic heating, repeated high-temperature charge and discharge, large-current charge and discharge, or high-potential overcharge and discharge; in the case where the electrolyte solution storage tank further includes an SEI film reactive type breaker storage tank, the SEI film may be removed by injecting an SEI film reactive type breaker into the lithium paste battery; in addition, the maintenance regeneration device can be combined with other devices to remove the SEI film of the lithium slurry battery, for example, the maintenance regeneration device is combined with a low-temperature device to remove the SEI film by low-temperature standing, cold and hot alternation and other methods. And (3) after the cleaning solution is emptied for the last time in the step (5), switching the liquid storage tank to an electrolyte storage tank containing the SEI film stabilizing and repairing additive, starting the gas driving device/the second liquid pump and the second liquid control valve, injecting the electrolyte containing the SEI film stabilizing and repairing additive into the lithium slurry battery through the liquid nozzle, standing and forming the lithium slurry battery, and simultaneously starting the gas driving device, the second gas control valve, the first liquid pump and the first liquid control valve to discharge the electrolyte containing the SEI film stabilizing and repairing additive into the liquid recovery device through the liquid nozzle.
In addition, the lithium slurry battery can be weighed in the process of replacing the liquid of the lithium slurry battery, so that the accurate liquid replacement of the lithium slurry battery is realized. Specifically, in the step (3), the lithium paste battery rowAfter draining, the weight m of the drained lithium paste battery was recorded by a weighing device3In the above step (7), after the air nozzle and the liquid nozzle are pulled out from the air port and the liquid port of the lithium paste battery, the weight m of the lithium paste battery in which the liquid injection has been completed is recorded by the weighing device4The amount of injected lithium paste is calculated from the difference in weight between the lithium paste batteries before and after the injection.
In the maintenance regeneration method of the lithium slurry battery, the gas injection process may include the steps of: (1) and (3) detection: when the pressure in the shell of the lithium slurry battery is lower than the lower limit of a preset pressure range, gas is injected into the lithium slurry battery, and a monitoring device of maintenance regeneration equipment is started to monitor the voltage and the temperature of the lithium slurry battery; (2) gas port butt joint: butting and sealing an air nozzle of the maintenance regeneration equipment with an air port of the lithium slurry battery; (3) gas injection: opening the gas driving device and the second gas control valve, injecting dry gas into the shell of the lithium slurry battery through the gas nozzle, and closing the gas driving device and the second gas control valve when detecting that the gas pressure in the shell reaches a preset pressure range; (4) and (3) ending gas injection: and closing the monitoring device, pulling the air nozzle out of the air port of the lithium slurry battery, and sealing the air port of the lithium slurry battery. The predetermined pressure range may be determined according to actual requirements, and may be, for example, 0.11MPa to 0.8 MPa. The detection of the pressure in the shell of the lithium slurry battery can be realized by a detection device of the lithium slurry battery, and can also be realized by arranging the detection device in a maintenance regeneration device. The lithium paste battery can be provided with one or more single lithium paste battery cells in the lithium paste battery shell, and the air pressure in the lithium paste battery shell is maintained in a preset range, so that the air pressure in the inner cavity of the lithium paste battery shell is greater than the air pressure in the inner cavity of the lithium paste battery cell, and the aim of the lithium paste battery is to form a pressure difference between the inner cavity of the shell and the inner cavity of the lithium paste battery cell, and the pressure difference is helpful for strengthening the sealing between the top cover of the cell shell and the lower shell of the cell shell.
In the maintenance regeneration method of the lithium slurry battery, the degassing process may include the steps of: (1) and (3) detection: when the pressure in the shell of the lithium slurry battery is higher than the upper limit of the preset pressure range, starting to exhaust the lithium slurry battery, and starting a monitoring device of the maintenance regeneration equipment to monitor the voltage and the temperature of the lithium slurry battery; (2) gas port butt joint: butting and sealing an air nozzle of the maintenance regeneration equipment with an air port of the lithium slurry battery; (3) exhausting: opening a third gas control valve to discharge gas in the shell to a gas recovery device through an air tap, and closing the third gas control valve when the gas pressure in the shell is detected to reach a preset pressure range; (4) and (4) finishing exhaust: and closing the monitoring device, pulling the air nozzle out of the air port of the lithium slurry battery, and sealing the air port of the lithium slurry battery. The predetermined pressure range may be determined according to actual requirements, and may be, for example, 0.11MPa to 0.8 MPa. The detection of the pressure in the shell of the lithium slurry battery can be realized by a detection device of the lithium slurry battery, and can also be realized by arranging the detection device in a maintenance regeneration device. The gas in the lithium slurry battery is discharged to the gas recovery device through the third gas control valve, so that unsafe conditions such as explosion and the like of the lithium slurry battery caused by overlarge internal pressure can be effectively prevented.
The invention has the advantages that:
(1) the lithium slurry battery maintenance regeneration equipment has the functions of liquid injection, liquid supplement, liquid replacement, gas injection, gas exhaust, formation and the like, and each functional module is integrated and modularly designed, so that the one-stop maintenance and regeneration of the lithium slurry battery are facilitated, and the targeted maintenance and regeneration can be flexibly carried out according to the requirement of the lithium slurry battery;
(2) the lithium slurry battery maintenance regeneration equipment can have flexible working modes and higher automation degree. The lithium slurry battery can be maintained and regenerated on the application site, for example, the lithium slurry battery can be maintained and regenerated by using the maintenance and regeneration equipment under the condition of not disassembling the battery when the lithium slurry battery is arranged on an electric automobile, and the maintenance and regeneration equipment can also be placed in a maintenance and regeneration station to maintain and regenerate the lithium slurry battery;
(3) the lithium slurry battery maintenance regeneration equipment has high efficiency, small occupied space, low energy consumption and low cost.
Drawings
Fig. 1 is a schematic view of a lithium slurry battery maintenance regeneration apparatus and a lithium slurry battery according to the present invention;
fig. 2 is a schematic structural view of a lithium slurry battery maintenance regeneration apparatus according to a first embodiment of the present invention;
fig. 3 is a schematic structural view of a lithium slurry battery maintenance regeneration apparatus according to a second embodiment of the present invention;
fig. 4 is a flow chart of a liquid injection in a maintenance regeneration method of a lithium paste battery according to the present invention;
fig. 5 is a flow chart of a liquid change in a maintenance regeneration method of a lithium paste battery according to the present invention;
fig. 6 is a flow chart of gas injection in a maintenance regeneration method of a lithium paste battery according to the present invention;
fig. 7 is a flow chart of exhaust gas in the maintenance regeneration method of a lithium paste battery according to the present invention.
List of reference numerals
1-maintenance regeneration facility
101-positive electrode joint
102-negative electrode tab
103-air tap
104-liquid nozzle
105-gas recovery device
106-gas storage tank
107-liquid recovery device
108-liquid storage tank
109-gas header
110-first gas line
111-first gas control valve
112-vacuum pumping device
113-second gas line
114-second gas control valve
115-gas driving device
116-third gas line
117-third gas control valve
118-liquid header
119-first liquid line
120-first liquid control valve
121-first liquid Pump
122-second liquid line
123-second liquid control valve
124-second liquid pump
125-gas driving pipeline
126-barometer
127-hydraulic pressure gauge
128-control device
2-lithium slurry battery
201-positive terminal
202-negative terminal
203-gas port
204-liquid port
Detailed Description
The invention will be further explained by embodiments in conjunction with the drawings.
Fig. 1 is a schematic view of a lithium paste battery maintenance regeneration apparatus and a lithium paste battery according to the present invention. The positive electrode tab 101 and the negative electrode tab 102 of the maintenance regeneration device 1 may be electrically connected to the positive electrode terminal 201 and the negative electrode terminal 202 of the lithium paste battery 2, respectively, so as to charge and discharge the lithium paste battery 2. The air nozzle 103 and the liquid nozzle 104 of the maintenance regeneration device 1 can be respectively connected with the air port 203 and the liquid port 204 of the lithium slurry battery 2, so that the maintenance work of liquid injection, liquid supplement, liquid replacement, gas injection, gas exhaust and the like of the lithium slurry battery is realized.
Fig. 2 is a schematic structural view of a lithium slurry battery maintenance regeneration apparatus according to a first embodiment of the present invention. The lithium slurry battery maintenance regeneration equipment comprises a gas nozzle 103, a vacuumizing device 112, a gas driving device 115, a third gas control valve 117, a gas recovery device 105, a gas storage tank 106, a liquid nozzle 104, a first liquid pump 121, a liquid recovery device 107 and a liquid storage tank 108. The gas nozzle 103 is connected to the gas recovery device 105 through a gas manifold 109 and a first gas pipeline 110, and a first gas control valve 111 and a vacuum pumping device 112 are arranged on the first gas pipeline 110; the gas nozzle 103 is connected to the gas storage tank 106 through a gas manifold 109 and a second gas pipeline 113, and a second gas control valve 114 and a gas driving device 115 are arranged on the second gas pipeline 113; the gas nozzle 103 is connected to the gas recovery device 105 via a gas manifold 109 and a third gas line 116, and a third gas control valve 117 is provided on the third gas line 116. The liquid nozzle 104 is connected to the liquid recovery device 107 via a liquid header 118 and a first liquid pipe 119, and a first liquid control valve 120 and a first liquid pump 121 are provided on the first liquid pipe 119; the liquid nozzle 104 is connected to the liquid storage tank 108 through a liquid main pipe 118 and a second liquid pipe 122, and a second liquid control valve 123 is arranged on the second liquid pipe 122; the liquid storage tank 108 is connected to a gas drive 115 via a gas drive line 125. A gas pressure gauge 126 is provided in the gas manifold 109, and a liquid pressure gauge 127 is provided in the liquid manifold 118. The control valves, vacuum, gas drive and liquid pump described above can be controlled by the control device 128.
Fig. 3 is a schematic structural view of a lithium paste battery maintenance regeneration apparatus according to a second embodiment of the present invention. This second embodiment differs from the first embodiment described above in that the liquid nipple 104 is connected to the liquid tank 108 via a liquid manifold 118 and a second liquid line 122, and a second liquid pump 124 and a second liquid control valve 123 are provided in the second liquid line 122. That is, the liquid in the liquid storage tank 108 is driven by the second liquid pump 124, rather than the gas in the gas drive 115 and the gas storage tank 106.
Fig. 4 is a flow chart of a fluid injection in a maintenance regeneration method of a lithium paste battery according to the present invention. First, the weight m of the lithium paste battery not injected with liquid was recorded by a weighing device1And an air nozzle 103 and a liquid nozzle 104 of the maintenance regeneration equipment are butted and sealed with an air port 203 and a liquid port 204 of the lithium slurry battery. Then, the vacuum-pumping device 112 and the first gas control valve 111 are opened, and the lithium paste battery is evacuated via the gas nozzle 103. When the vacuum degree reaches below-60 KPa, the vacuumizing device 112 and the first gas control valve 111 are closed, the gas driving device 115/the second liquid pump 124 are opened, the second liquid control valve 123 is opened, and the lithium slurry battery is injected through the liquid nozzle 104. Next, the gas driving device 115 and the second gas control valve 114 are opened to pressurize the inside of the lithium paste battery and to discharge the lithium pasteAnd (5) standing the battery. And repeating the steps of vacuumizing and injecting liquid for 3-5 times. After the liquid injection is finished, the gas driving device 115/the second liquid pump 124 is closed, the second liquid control valve 123 is closed, the gas nozzle 103 and the liquid nozzle 104 are pulled out from the gas port 203 and the liquid port 204 of the lithium slurry battery, the gas port and the liquid port of the lithium slurry battery are sealed, and the weight m of the lithium slurry battery after the liquid injection is finished is recorded through the weighing device2The amount of injected lithium paste is calculated from the difference in weight between the lithium paste batteries before and after the injection.
Fig. 5 is a flow chart illustrating a liquid change in a method for maintaining and regenerating a lithium paste battery according to the present invention. Firstly, discharging the lithium slurry battery until the charge capacity is zero, butting and sealing an air nozzle 103 and a liquid nozzle 104 of a maintenance and regeneration device with an air port 203 and a liquid port 204 of the lithium slurry battery, and destroying SEI films on the surfaces of positive and negative electrode materials and a current collector of the lithium slurry battery by ultrasonic heating. Then, the gas driving device 115, the second gas control valve 114, the first liquid pump 121, and the first liquid control valve 120 are simultaneously opened, so that the electrolyte in the lithium slurry battery is discharged to the liquid recovery device 107 through the liquid nozzle 104. After the completion of the draining, the gas driving device 115, the second gas control valve 114, the first liquid pump 121, and the first liquid control valve 120 were closed, and the weight m of the lithium paste battery after the draining was recorded by the weighing device3The vacuumizing device 112 and the first gas control valve 111 are opened, the lithium slurry battery is vacuumized through the gas nozzle 103, and the vacuumizing device 112 and the first gas control valve 111 are closed when the vacuum degree reaches below-60 KPa. Next, the gas driving device 115/the second liquid pump 124 is turned on, the second liquid control valve 123 is turned on, the cleaning liquid is injected into the lithium slurry battery through the liquid nozzle 104, when the cleaning liquid is filled in the lithium slurry battery, the gas driving device 115/the second liquid pump 124 is turned off, the second liquid control valve 123 is turned off, the gas driving device 115 and the second gas control valve 114 are turned on to pressurize the interior of the lithium slurry battery, and the vibration heating device is turned on to heat and vibrate the lithium slurry battery, so that the lithium slurry battery is sufficiently cleaned. And repeating the steps of draining, vacuumizing and cleaning for 1-5 times, and then discharging the cleaning liquid in the lithium slurry battery. The gas drive 115/second pump 124 is turned on and the second liquid control valve 123 is turned on to electrically charge the lithium slurry via the nozzle 104And (3) injecting electrolyte containing an SEI film stabilizing and repairing additive into the cell, standing, forming, draining liquid of the lithium slurry battery, and vacuumizing. Then, the gas driving device 115/the second liquid pump 124 is turned on, the second liquid control valve 123 is turned on, the electrolyte is injected into the lithium slurry battery through the liquid nozzle 104, when the lithium slurry battery is filled with the electrolyte, the gas driving device 115/the second liquid pump 124 is turned off, the second liquid control valve 123 is turned off, and the gas driving device 115 and the second gas control valve 114 are turned on to pressurize the interior of the lithium slurry battery. Finally, the air nozzle 103 and the liquid nozzle 104 are pulled out from the air port and the liquid port of the lithium slurry battery, the air port and the liquid port of the lithium slurry battery are sealed, and the weight m of the lithium slurry battery after liquid injection is recorded through a weighing device4And calculating the liquid injection amount of the battery according to the weight difference of the lithium slurry battery before and after liquid replacement.
Fig. 6 is a flow chart illustrating a gas injection in a maintenance regeneration method of a lithium paste battery according to the present invention. Firstly, when the lithium slurry battery detects that the pressure in the shell is lower than the lower limit of a preset pressure range, such as 0.15MPa, gas injection is started to the lithium slurry battery, a monitoring device of the maintenance and regeneration equipment is started to monitor the voltage and the temperature of the lithium slurry battery in the whole gas injection process, and the gas nozzle 103 of the maintenance and regeneration equipment is butted and sealed with the gas port 203 of the lithium slurry battery. Then, the gas driving device 115 and the second gas control valve 114 are opened, and dry gas is injected into the case of the lithium paste battery through the gas nozzle 103. The gas pressure in the lithium slurry battery case was detected during the gas injection process. When the gas pressure in the shell is detected to reach the preset pressure range, the gas driving device 115 and the second gas control valve 114 are closed, the monitoring device is closed, the gas nozzle 103 is pulled out from the gas port of the lithium slurry battery, and the gas port of the lithium slurry battery is sealed.
Fig. 7 is a flow chart of exhaust gas in the maintenance regeneration method of a lithium paste battery according to the present invention. Firstly, when the lithium slurry battery detects that the pressure in the shell is higher than the upper limit of a preset pressure range, such as 0.5MPa, the lithium slurry battery starts to be exhausted, the monitoring device of the maintenance regeneration device is started to monitor the voltage and the temperature of the lithium slurry battery in the whole exhaust process, and the air nozzle 103 of the maintenance regeneration device is butted and sealed with the air port 203 of the lithium slurry battery. Next, the third gas control valve 117 is opened so that the gas inside the lithium slurry battery is discharged to the gas recovery device 105 through the gas nozzle 103. The gas pressure in the lithium slurry battery case was detected during the air discharge. When the gas pressure in the shell is detected to reach the preset pressure range, the third gas control valve 117 is closed, the monitoring device is closed, the gas nozzle 103 is pulled out from the gas port of the lithium paste battery, and the gas port of the lithium paste battery is sealed.
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 (19)
1. A maintenance regeneration apparatus for a lithium slurry battery including a gas port and a liquid port capable of fluid communication with the interior of a lithium slurry battery case, the maintenance regeneration apparatus comprising: the air tap can be connected with or disconnected from an air port of the lithium paste battery; a liquid nozzle capable of being connected or disconnected with a liquid port of the lithium paste battery; the gas recovery device is connected to the gas nozzle through a first gas pipeline and a gas main pipe; the first gas control valve is arranged on the first gas pipeline and can enable gas in the lithium slurry battery to enter the gas recycling device through the gas nozzle, the gas manifold and the first gas pipeline; the gas storage tank is connected to the gas nozzle through a second gas pipeline and the gas main pipe; a second gas control valve disposed on the second gas line and capable of allowing the gas in the gas storage tank to enter the lithium slurry battery through the second gas line, the gas manifold, and the gas tap; the liquid recovery device is connected to the liquid nozzle through a first liquid pipeline and a liquid main pipe; a first liquid control valve disposed on the first liquid pipe and capable of allowing liquid in the lithium slurry battery to enter the liquid recovery device via the liquid nozzle, the liquid header pipe, and the first liquid pipe; a liquid storage tank connected to the liquid nozzle by a second liquid line and the liquid manifold; a second liquid control valve disposed on the second liquid line and capable of allowing liquid in the liquid storage tank to enter the lithium slurry battery via the second liquid line, the liquid manifold, and the liquid nozzle.
2. The maintenance regeneration apparatus for a lithium slurry battery according to claim 1, wherein the liquid storage tanks include a first electrolyte storage tank in which an electrolyte is stored, a cleaning solution storage tank in which a cleaning solution is stored, and a second electrolyte storage tank in which an electrolyte containing an SEI film stabilizing and repairing additive is stored, the first electrolyte storage tank, the cleaning solution storage tank, and the second electrolyte storage tank being capable of communicating with the second liquid line through a switching valve or a liquid control valve, respectively, the electrolyte being a mixture of a lithium salt and a solvent; the cleaning solution is ester and carbonate derivative cleaning agent, ether cleaning agent or ketone cleaning agent; the SEI film stabilizing and repairing additive is used by matching one or more of the following additives: the additive comprises a sulfinyl additive, a sulfonate additive, vinylene carbonate, anisole or halogenated derivatives thereof, halogenated organic matters and an inorganic additive, wherein the inorganic additive is sulfur dioxide, carbon dioxide or lithium carbonate;
the gas storage tank is internally stored with dry gas, the dry gas is one or a mixture of nitrogen, air, inert gas and sulfur hexafluoride, and the water content of the dry gas is less than or equal to 0.1 ppm.
3. The apparatus for maintaining and regenerating a lithium slurry battery according to claim 1, wherein the apparatus further comprises a vacuum extractor disposed in the first gas line and capable of evacuating the lithium slurry battery via the gas nozzle; the maintenance and regeneration equipment further comprises a first liquid pump which is arranged on the first liquid pipeline and can pump the liquid in the lithium slurry battery through the liquid nozzle.
4. The apparatus for maintaining and regenerating the lithium slurry battery according to claim 3, wherein the apparatus further comprises a gas driving device disposed on the second gas pipeline and connected to the liquid storage tank via a gas driving pipeline, the gas driving device being capable of driving gas in the gas storage tank into the lithium slurry battery via the gas nozzle and the gas port of the lithium slurry battery and being capable of driving gas in the gas storage tank into the liquid storage tank and further driving liquid in the liquid storage tank into the lithium slurry battery via the liquid nozzle and the liquid port of the lithium slurry battery.
5. The lithium slurry battery maintenance and regeneration device according to claim 3, further comprising a gas driving device disposed on the second gas pipeline, wherein the gas driving device is capable of driving gas in the gas storage tank into the lithium slurry battery through the gas nozzle and the gas port of the lithium slurry battery; the maintenance and regeneration equipment further comprises a second liquid pump, the second liquid pump is arranged on the second liquid pipeline, and the second liquid pump can drive liquid in the liquid storage tank to enter the lithium slurry battery through the liquid nozzle and the liquid port of the lithium slurry battery.
6. The apparatus for maintaining and regenerating a lithium paste battery according to claim 1, wherein the apparatus further comprises a third gas line, the third gas line and the gas manifold connect the gas nipple to the gas recovery device, a third gas control valve is provided on the third gas line, and when the gas pressure in the lithium paste battery is greater than a predetermined gas pressure, the gas in the lithium paste battery can enter the gas recovery device through the gas nipple, the gas manifold, the third gas line and the third gas control valve.
7. The maintenance regeneration apparatus for a lithium paste battery according to claim 1, wherein a gas pressure gauge is provided in the gas manifold to detect a gas pressure in the gas manifold; and a hydraulic gauge is arranged in the liquid main pipe and used for detecting the hydraulic pressure in the liquid main pipe.
8. The maintenance regeneration apparatus for a lithium paste battery according to claim 1, wherein the maintenance regeneration apparatus comprises a vibration heating device by which the lithium paste battery can be vibration heated.
9. The maintenance regeneration apparatus for a lithium paste battery according to claim 1, wherein the maintenance regeneration apparatus comprises a formation device whose positive electrode tab and negative electrode tab are electrically connectable with a positive electrode terminal and a negative electrode terminal of the lithium paste battery, respectively, and are capable of charging and discharging the lithium paste battery.
10. The maintenance regeneration apparatus for a lithium slurry battery according to claim 1, wherein the maintenance regeneration apparatus comprises a monitoring device for monitoring the voltage and temperature of the lithium slurry battery during the maintenance regeneration of the lithium slurry battery.
11. The maintenance regeneration apparatus for a lithium slurry battery according to any one of claims 1 to 10, wherein the maintenance regeneration apparatus comprises a control device by which opening and closing of a gas control valve, a liquid control valve, a switching valve, a vacuum pumping device, a gas driving device, a liquid pump, a vibration heating device, a formation device, and a monitoring device of the maintenance regeneration apparatus can be controlled.
12. A method for maintaining and regenerating a lithium paste battery, characterized in that the lithium paste battery provided with a gas port and a liquid port is subjected to liquid injection, liquid replenishment, liquid replacement, gas injection or gas exhaust by using the apparatus for maintaining and regenerating a lithium paste battery according to any one of claims 1 to 11.
13. The method for maintaining and regenerating a lithium paste battery according to claim 12, wherein the charging process comprises the steps of:
(1) butt joint of gas and liquid ports: respectively butting and sealing an air nozzle and a liquid nozzle of the maintenance regeneration equipment with an air port and a liquid port of the lithium slurry battery;
(2) vacuumizing: opening the vacuumizing device and the first gas control valve, vacuumizing the lithium slurry battery through the air tap, and closing the vacuumizing device and the first gas control valve;
(3) liquid injection: starting the gas driving device/the second liquid pump and the second liquid control valve, injecting the lithium slurry battery through the liquid nozzle, and closing the gas driving device/the second liquid pump and the second liquid control valve when the lithium slurry battery is filled with the electrolyte;
(4) alternately vacuumizing and injecting liquid: repeating the steps (2) - (3) for 3-5 times;
(5) and (4) finishing injection: and pulling the air nozzle and the liquid nozzle out of the air port and the liquid port of the lithium slurry battery, and sealing the air port and the liquid port of the lithium slurry battery.
14. The method for maintaining and regenerating a lithium paste battery according to claim 13, wherein, in the step (3), after the lithium paste battery is filled with the electrolyte, the gas driving device and the second gas control valve are opened to pressurize the inside of the lithium paste battery and the lithium paste battery is left to stand.
15. The method for maintaining and regenerating a lithium paste battery according to claim 12, wherein the replenishing process comprises the steps of:
(1) butt joint of gas and liquid ports: respectively butting and sealing an air nozzle and a liquid nozzle of the maintenance regeneration equipment with an air port and a liquid port of the lithium slurry battery, and starting a monitoring device of the maintenance regeneration equipment to monitor the voltage and the temperature of the lithium slurry battery;
(2) vacuumizing: opening the vacuumizing device and the first gas control valve, vacuumizing the lithium slurry battery through the air tap, and closing the vacuumizing device and the first gas control valve;
(3) liquid injection: starting the gas driving device/the second liquid pump and the second liquid control valve, injecting the lithium slurry battery through the liquid nozzle, and closing the gas driving device/the second liquid pump and the second liquid control valve when the lithium slurry battery is filled with the electrolyte;
(4) alternately vacuumizing and injecting liquid: repeating the steps (2) - (3) for 3-5 times;
(5) and (4) finishing injection: and closing the monitoring device, pulling the air nozzle and the liquid nozzle out of the air port and the liquid port of the lithium slurry battery, and sealing the air port and the liquid port of the lithium slurry battery.
16. The method for maintaining and regenerating a lithium paste battery according to claim 12, wherein the liquid change process comprises the steps of:
(1) discharging: discharging the lithium slurry battery to zero charge capacity;
(2) butt joint of gas and liquid ports: respectively butting and sealing an air nozzle and a liquid nozzle of the maintenance regeneration equipment with an air port and a liquid port of the lithium slurry battery;
(3) liquid drainage: simultaneously opening the gas driving device, the second gas control valve, the first liquid pump and the first liquid control valve to discharge the electrolyte in the lithium slurry battery to the liquid recovery device through the liquid nozzle, and closing the gas driving device, the second gas control valve, the first liquid pump and the first liquid control valve after the liquid discharge is finished;
(4) liquid injection and cleaning: a. vacuumizing: opening the vacuumizing device and the first gas control valve, vacuumizing the lithium slurry battery through the air tap, and closing the vacuumizing device and the first gas control valve; b. injecting a cleaning solution: starting the gas driving device/the second liquid pump and starting the second liquid control valve, injecting cleaning liquid into the lithium slurry battery through the liquid nozzle, and closing the gas driving device/the second liquid pump and closing the second liquid control valve when the lithium slurry battery is filled with the cleaning liquid; c. supercharging: opening the gas driving device and the second gas control valve to pressurize the interior of the lithium slurry battery; d. cleaning: heating and vibrating the lithium slurry battery, thereby fully cleaning the lithium slurry battery;
(5) alternately discharging liquid and injecting liquid for cleaning: repeating the steps (3) to (4) for 1-5 times;
(6) liquid drainage: simultaneously opening the gas driving device, the second gas control valve, the first liquid pump and the first liquid control valve to discharge the cleaning liquid in the lithium slurry battery to the liquid recovery device through the liquid nozzle, and closing the gas driving device, the second gas control valve, the first liquid pump and the first liquid control valve after liquid discharge is finished;
(7) and (4) secondary liquid injection: a. vacuumizing: opening the vacuumizing device and the first gas control valve, vacuumizing the lithium slurry battery through the air tap, and closing the vacuumizing device and the first gas control valve; b. liquid injection: starting the gas driving device/the second liquid pump and starting the second liquid control valve, injecting electrolyte into the lithium slurry battery through the liquid nozzle, and closing the gas driving device/the second liquid pump and closing the second liquid control valve when the lithium slurry battery is filled with the electrolyte; c. supercharging: opening the gas driving device and the second gas control valve to pressurize the interior of the lithium slurry battery;
(8) and (5) finishing liquid change: and pulling the air nozzle and the liquid nozzle out of the air port and the liquid port of the lithium slurry battery, and sealing the air port and the liquid port of the lithium slurry battery.
17. The method for maintaining and regenerating a lithium paste battery according to claim 16, wherein after the lithium paste battery is discharged in the step (1), the SEI film on the surfaces of the positive and negative electrode materials and the current collector of the lithium paste battery is destroyed by a method of high-temperature treatment, ultrasonic heating, repeated high-temperature charge and discharge, high-current charge and discharge, or high-potential overcharge and discharge; and (3) after the cleaning solution is emptied for the last time in the step (5), turning on the gas driving device/the second liquid pump and turning on the second liquid control valve, injecting electrolyte containing an SEI film stabilizing and repairing additive into the lithium slurry battery through the liquid nozzle, and after the lithium slurry battery is stood and formed, simultaneously turning on the gas driving device, the second gas control valve, the first liquid pump and the first liquid control valve to discharge the electrolyte containing the SEI film stabilizing and repairing additive into the liquid recovery device through the liquid nozzle.
18. The method for the maintenance and regeneration of a lithium paste battery according to claim 12, wherein the gas injection process comprises the steps of:
(1) and (3) detection: when the pressure in the shell of the lithium slurry battery is lower than a preset pressure range, starting gas injection on the lithium slurry battery, and starting a monitoring device of the maintenance regeneration equipment to monitor the voltage and the temperature of the lithium slurry battery;
(2) gas port butt joint: butting and sealing an air nozzle of the maintenance regeneration equipment with an air port of the lithium slurry battery;
(3) gas injection: opening the gas driving device and the second gas control valve, injecting dry gas into the shell of the lithium slurry battery through the gas nozzle, and closing the gas driving device and the second gas control valve when detecting that the gas pressure in the shell reaches the preset pressure range;
(4) and (3) ending gas injection: and closing the monitoring device, pulling the air nozzle out of the air port of the lithium slurry battery, and sealing the air port of the lithium slurry battery.
19. The maintenance regeneration method of a lithium paste battery according to claim 12, wherein the air discharge process comprises the steps of:
(1) and (3) detection: when the pressure in the shell of the lithium slurry battery is higher than a preset pressure range, starting to exhaust the lithium slurry battery, and starting a monitoring device of the maintenance regeneration equipment to monitor the voltage and the temperature of the lithium slurry battery;
(2) gas port butt joint: butting and sealing an air nozzle of the maintenance regeneration equipment with an air port of the lithium slurry battery;
(3) exhausting: the maintenance and regeneration equipment further comprises a third gas pipeline, the third gas pipeline and the gas main pipe connect the gas nozzle to the gas recovery device, a third gas control valve is arranged on the third gas pipeline, the third gas control valve is opened to discharge gas in the shell of the lithium slurry battery to the gas recovery device through the gas nozzle, and when the gas pressure in the shell is detected to reach the preset pressure range, the third gas control valve is closed;
(4) and (4) finishing exhaust: and closing the monitoring device, pulling the air nozzle out of the air port of the lithium slurry battery, and sealing the air port of the lithium slurry battery.
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| CN201710224927.7A CN108695485B (en) | 2017-04-07 | 2017-04-07 | Maintenance regeneration equipment and method for lithium slurry battery |
| US16/496,584 US11233276B2 (en) | 2017-04-07 | 2018-04-04 | Lithium slurry battery system |
| PCT/CN2018/081917 WO2018184566A1 (en) | 2017-04-07 | 2018-04-04 | Lithium slurry battery system |
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| CN113495212A (en) * | 2020-03-18 | 2021-10-12 | 北京好风光储能技术有限公司 | Method for estimating maintenance regeneration times and cycle life of maintainable regenerative battery |
| CN111446499A (en) * | 2020-04-03 | 2020-07-24 | 江西理工大学 | Mixed lithium salt electrolyte |
| CN115275400A (en) * | 2022-09-26 | 2022-11-01 | 天津普兰能源科技有限公司 | Regeneration method of energy storage device |
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