CN114937757B - Pole piece lithium supplementing device and lithium supplementing method - Google Patents
Pole piece lithium supplementing device and lithium supplementing method Download PDFInfo
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- CN114937757B CN114937757B CN202210227927.3A CN202210227927A CN114937757B CN 114937757 B CN114937757 B CN 114937757B CN 202210227927 A CN202210227927 A CN 202210227927A CN 114937757 B CN114937757 B CN 114937757B
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 313
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 263
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 122
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000011888 foil Substances 0.000 claims abstract description 101
- 239000000463 material Substances 0.000 claims abstract description 41
- 230000007246 mechanism Effects 0.000 claims abstract description 41
- 239000013589 supplement Substances 0.000 claims abstract description 12
- 239000012298 atmosphere Substances 0.000 claims description 38
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 37
- 239000010410 layer Substances 0.000 claims description 33
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 17
- 229910052757 nitrogen Inorganic materials 0.000 claims description 16
- 239000011247 coating layer Substances 0.000 claims description 14
- 238000001125 extrusion Methods 0.000 claims description 10
- 238000009423 ventilation Methods 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000007613 environmental effect Effects 0.000 claims description 6
- 239000003960 organic solvent Substances 0.000 claims description 6
- IDBFBDSKYCUNPW-UHFFFAOYSA-N lithium nitride Chemical group [Li]N([Li])[Li] IDBFBDSKYCUNPW-UHFFFAOYSA-N 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 238000007665 sagging Methods 0.000 claims description 2
- 230000003020 moisturizing effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 239000002245 particle Substances 0.000 description 19
- 230000009469 supplementation Effects 0.000 description 9
- 229910001873 dinitrogen Inorganic materials 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011258 core-shell material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- CQDGTJPVBWZJAZ-UHFFFAOYSA-N monoethyl carbonate Chemical compound CCOC(O)=O CQDGTJPVBWZJAZ-UHFFFAOYSA-N 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
-
- 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
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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)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The application relates to a pole piece lithium supplementing device and a lithium supplementing method, wherein the pole piece lithium supplementing device comprises an unreeling roller for unreeling a pole roll foil, a reeling roller for reeling the pole roll foil, and a plurality of groups of lithium supplementing mechanisms are arranged on a path from unreeling to reeling of the pole roll foil, and each lithium supplementing mechanism comprises a first lithium supplementing component, a second lithium supplementing component and a third lithium supplementing component, wherein pits are punched on the surface of the pole roll foil, the second lithium supplementing component is used for paving lithium materials on the surface of the pole roll foil, and the third lithium supplementing component is used for extruding the surface of the pole roll foil with the pits. The application has the effect of improving the controllability of lithium supplement.
Description
Technical Field
The application relates to the field of lithium supplementing devices, in particular to a pole piece lithium supplementing device and a lithium supplementing method.
Background
In the cyclic charge and discharge process of the lithium ion battery, particularly in the first formation, the charge and discharge coulomb efficiency is less than or equal to 95%, and the coulomb efficiency cannot be 100% completely in each charge and discharge. The resulting lithium losses are irreversible losses, which consist of lithium losses forming an SEI film and lithium losses of side reactions, thus affecting coulombic efficiency, energy efficiency and effective utilization of lithium. To solve this problem, the current lithium supplementing means is chemical lithium supplementing and physical lithium supplementing, and lithium supplementing is performed by combining equipment.
However, lithium supplementation involves environmental control, lithium supplementation mode, lithium supplementation amount, safety regulations and the like, and causes lithium supplementation difficulty, ineffective lithium supplementation and fire and explosion safety accidents caused by lithium supplementation.
Disclosure of Invention
In order to improve controllability of lithium supplement, the application provides a pole piece lithium supplement device and a lithium supplement method.
The application provides a pole piece lithium supplementing device and a pole piece lithium supplementing method, which adopt the following technical scheme:
in a first aspect, the application provides a pole piece lithium supplementing device, which adopts the following technical scheme:
the utility model provides a pole piece benefit lithium device, is equipped with a plurality of lithium mechanism that mends including the unreeling roller that is used for unreeling extremely to roll up the paper tinsel material, the wind-up roller that is used for rolling extremely to roll up the paper tinsel material by unreeling to rolling route on, the lithium mechanism that mends includes the first lithium subassembly that mends that stabs the pit at extremely roll up paper tinsel material surface, to the second lithium subassembly that mends of extremely roll up paper tinsel material surface shop filling lithium material and the third lithium subassembly that extrudees extremely roll up paper tinsel material and have the surface of pit.
Through adopting above-mentioned technical scheme to extremely roll up the foil as the carrier, stab the pit at extremely roll up the foil surface through first benefit lithium subassembly, the material of extremely roll up the foil that takes out from the pit at this moment can stay the surface of extremely roll up the foil, accessible second benefit lithium subassembly fills the lithium material to the pit in this moment. Therefore, when the third lithium supplementing assembly extrudes the surface of the pole roll foil, on one hand, lithium materials falling near the pits can be extruded and pulled to be pressed into the pits; on the other hand, the pricked material is extruded and filled and covers the pits, so that the contact area of the lithium material and air is reduced; furthermore, after the steps, the embedding of the lithium material and the pole-rolled foil is very tight, so that the pole-rolled foil containing the lithium material can be rolled and unrolled. Therefore, the rolled pole foil containing the lithium material can be used as a base material for supplementing lithium to the lithium battery; when the pole roll foil for lithium supplement is called as a lithium band, on one hand, the lithium band and the lithium content in the lithium band can be controlled very easily, so that the lithium content of the lithium band can be matched with the required amount of a lithium battery to be supplemented, and the potential safety hazard caused by excessive lithium is reduced; on the other hand, the contact between lithium and air in the lithium supplementing process is reduced, so that the requirement on the environment is reduced. Based on the two points, the controllability of lithium supplement of the battery is greatly improved.
Optionally, the first lithium supplementing assembly comprises a first roller, and burrs are arranged on the surface of the first roller.
Through adopting above-mentioned technical scheme, the surface of first running roller can conflict the pole and roll up the surface of foil in order to provide support and location basis, so control burr length can control the degree of depth of pit, and the density of pit can be controlled to the number of control burr or the rotational speed of first running roller to reach the effect of the lithium content and the lithium material inlay degree of depth of control unit length pole volume foil.
Optionally, the second benefit lithium subassembly is including sleeve, atmosphere case and the organic bath case of intercommunication each other in proper order, telescopic export links to each other with the atmosphere case and is equipped with the screen cloth, can load the lithium source in the sleeve, telescopic entry is equipped with the extrusion propeller that pushes the lithium source into the screen cloth, the atmosphere case is equipped with the air inlet hole with atmosphere case inner chamber intercommunication.
By adopting the technical scheme, the lithium source is generally a lithium block or a lithium rod, and when the lithium source is extruded and pushed to the screen by the extrusion propeller, the holes of the screen divide the lithium source. When the mesh of the screen is small enough, the lithium source passing through the screen is divided into small particles, the particles are called lithium cores, the lithium cores are separated and then fall into an atmosphere box, and the atmosphere box can be filled with proper gas to form an atmosphere environment with the gas only, so that the atmosphere environment reacts with the surface of the lithium cores to form an inorganic shell, for example, the gas is nitrogen, and the surface of the lithium cores can react to form Li3N in the falling process of the lithium cores. Then falls into an organic bath box to make the outer layer of the lithium core wrap with organic solvent, such as ethylene carbonate solution. The lithium core can form an inorganic-organic core-shell conforming structure which is stable under 25% of humidity by changing the environmental conditions, the inorganic-organic core-shell conforming structure is called lithium particles, so that the lithium particles can be stably filled into pits of the pole coil foil, or the lithium particles are formed in the pits due to changing the environment, and the lithium particles have higher stability. When lithium is supplemented to the lithium battery, if necessary, the organic shell and the lithium core can be separated by changing the environmental conditions such as temperature, so that stable lithium supplementation is realized.
Optionally, the lithium supplementing device at least comprises two groups of lithium supplementing mechanisms, the lithium supplementing mechanisms are located above the pole winding foil materials at corresponding positions, one group of lithium supplementing mechanisms located at the upstream are set to be a first group of lithium supplementing mechanisms, the upward surface of the pole winding foil materials located on the first group of lithium supplementing mechanisms is set to be an A surface, and a lifting roller group which leads the pole winding foil materials to the second group of lithium supplementing mechanisms and faces the A surface downwards is arranged between the two groups of lithium supplementing mechanisms.
Through adopting above-mentioned technical scheme, the lift roller set turns over the utmost point roll of foil, makes extremely roll of foil two surfaces all can become up the state in the transportation, and so two surfaces set up the lithium mechanism that mends corresponding position up and can make two surfaces of extremely roll of foil all imbed the lithium grain to can improve the lithium content of extremely roll of foil of unit length by a wide margin according to the demand, also can make this extremely roll of foil can be applied to two-sided environment that can carry out lithium cell benefit lithium in step.
Optionally, the lithium supplementing device comprises a plurality of guide rollers, the guide pole rolled foil materials passing through the guide rollers and the step-up roller group form a plurality of layers stacked in height, and the lithium supplementing mechanism is positioned between the pole rolled foil materials of two adjacent layers.
By adopting the technical scheme, a plurality of layers are formed in height, so that lithium particles are gradually compacted in the process of conveying the pole coil foil, and on the other hand, when the lower surface of the upper pole coil foil is provided with the lithium particles which are not pressed into the pits, the lithium particles on the surface can fall back to the lower pole coil foil on the same surface for filling the pits on the lower layer; therefore, on one hand, pits on the surface of the pole roll foil can be fully filled, and on the other hand, the waste of lithium particles is avoided.
Optionally, an unreeling tension roller set is arranged at a working procedure position between the unreeling roller and the lithium supplementing mechanism, a pole piece deviation corrector is arranged between the unreeling tension roller set and the unreeling roller, and a winding tension roller set is arranged between the lithium supplementing mechanism and the winding roller.
By adopting the technical scheme, the pole-rolled foil is kept in a tensioning state in the transmission process, and the lithium supplementing mechanism can act on the pole-rolled foil more stably.
In a second aspect, the application provides a pole piece lithium supplementing method, which adopts the following technical scheme:
the pole piece lithium supplementing method comprises unreeling pole roll foil and reeling at the other place; the lithium supplementing mechanism is arranged on the transmission path of the pole-rolled foil, pits are punched on the surface of the pole-rolled foil, then the organic solution with the lithium cores is released to the surface of the pole-rolled foil with the pits, then the lithium cores, the organic solvent and dressing produced by punching the pits are filled into the pits through rolling and flattened, wherein the organic solvent can be solidified when the temperature is reduced to a certain value, and an organic coating layer is formed outside the lithium cores.
By adopting the technical scheme, the polar foil is used as a carrier, the organic solvent with lithium cores is used as lithium material, embedded granular lithium particles are formed on the surface of the polar foil, and the lithium particles are protected by the organic coating layer, so that the lithium particles can not be directly contacted with air, and the shape is quite stable. The rolled pole foil containing the lithium material can be used as a base material for supplementing lithium to the lithium battery; when the pole roll foil for lithium supplement is called as a lithium band, on one hand, the lithium band and the lithium content in the lithium band can be controlled very easily, so that the lithium content of the lithium band can be matched with the required amount of a lithium battery to be supplemented, and the potential safety hazard caused by excessive lithium is reduced; on the other hand, the contact between lithium and air in the lithium supplementing process is reduced, so that the requirement on the environment is reduced. Based on the two points, the controllability of lithium supplement of the battery is greatly improved.
Optionally, the lithium supplementing mechanism releases lithium by the following steps: extruding solid lithium in a closed environment to form granular lithium cores, chemically reacting the lithium cores under a certain atmosphere condition to generate an inorganic buffer layer, and then entering a 30-45 ℃ ethylene carbonate solution; the environmental temperature of the pole coil foil is lower than 28 ℃, the temperature of the lithium core after being immersed in the ethylene carbonate solution is reduced to 20-28 ℃, and the ethylene carbonate forms an organic coating layer for the lithium core with an inorganic buffer layer under the drive of free energy on the surface when being cooled.
By adopting the technical scheme, the spherical structure after coating is called lithium particles, the lithium particles are composed of lithium cores, an inorganic buffer layer and an organic coating layer, when the humidity environment is less than 25% and the temperature environment is less than or equal to 28 ℃, the properties of the lithium particles are very stable, and the lithium-containing pole rolled foil in the environment can be well stored; when the pole roll foil is used for lithium battery lithium supplementation, the organic coating layer can be melted by improving the temperature environment, the humidity environment or the combination of the temperature environment and the humidity environment, so that the lithium core is released for lithium battery lithium supplementation.
Optionally, the diameter of the lithium core is 3-5 micrometers, the lithium core is extruded from the screen mesh in an extrusion mode by the lithium rod, the thickness of the organic coating layer is 0.3-3 micrometers, the certain atmosphere condition is nitrogen, the flow rate of the nitrogen is 5-100 mL/min, and the inorganic buffer layer is Li3N.
By adopting the technical scheme, when the lithium core is positioned in the range, on one hand, the spherical or spheroidic structure is easy to naturally form when the lithium core is extruded from the screen, and on the other hand, the complete inorganic buffer layer can be better formed when the lithium core falls from the atmosphere box by combining the flow rate of nitrogen.
Optionally, the screen mesh is 3000-5000 meshes, and the temperature and the pressure of the atmosphere condition are normal temperature and normal pressure.
By adopting the technical scheme, on the basis of keeping enough generation amount of lithium cores, the lithium cores can well form a complete inorganic buffer layer when falling from the atmosphere box.
In summary, the present application includes at least one of the following beneficial technical effects:
1. and taking the pole roll foil as a carrier, punching a pit on the surface of the pole roll foil through the first lithium supplementing assembly, wherein the material of the pole roll foil brought out of the pit can be remained on the surface of the pole roll foil, and then, lithium materials can be filled into the pit through the second lithium supplementing assembly. Therefore, when the third lithium supplementing assembly extrudes the surface of the pole roll foil, on one hand, lithium materials falling near the pits can be extruded and pulled to be pressed into the pits; on the other hand, the pricked material is extruded and filled and covers the pits, so that the contact area of the lithium material and air is reduced; furthermore, after the steps, the embedding of the lithium material and the pole-rolled foil is very tight, so that the pole-rolled foil containing the lithium material can be rolled and unrolled. Therefore, the rolled pole foil containing the lithium material can be used as a base material for supplementing lithium to the lithium battery; when the pole roll foil for lithium supplement is called as a lithium band, on one hand, the lithium band and the lithium content in the lithium band can be controlled very easily, so that the lithium content of the lithium band can be matched with the required amount of a lithium battery to be supplemented, and the potential safety hazard caused by excessive lithium is reduced; on the other hand, the contact between lithium and air in the lithium supplementing process is reduced, so that the requirement on the environment is reduced. Based on the two points, the controllability of lithium supplement of the battery is greatly improved;
2. the surface of the first roller can be abutted against the surface of the pole-rolled foil to provide supporting and positioning basis, so that the depth of the pits can be controlled by controlling the length of burrs, and the density of the pits can be controlled by controlling the quantity of the burrs or the rotating speed of the first roller, thereby achieving the effect of controlling the lithium content of the pole-rolled foil in unit length and the embedding depth of the lithium material.
Drawings
Fig. 1 is a schematic structural diagram of a pole piece lithium supplementing device according to this embodiment.
Fig. 2 is a structural diagram of a second lithium supplementing assembly of the present embodiment.
Fig. 3 is an internal structural view of the second lithium supplementing assembly of the present embodiment.
Reference numerals illustrate: 1. pole roll foil; 2. a first lithium supplementing component; 21. a first roller; 22. burrs; 3. a second lithium supplementing component; 31. a sleeve; 311. an inner cylinder; 312. an outer cylinder; 313. filling the cavity; 314. a screen; 315. a ventilation chamber; 316. an air tap; 317. a spacer; 32. an atmosphere box; 321. a vent hole; 33. an organic bath box; 331. a liquid inlet pipe; 332. a liquid outlet; 333. swing rod; 3331. an air outlet channel; 334. a rotating shaft; 335. a sealing hammer; 336. a baffle; 337. a driven gear; 338. a drive gear; 3381. a convex column; 339. a pushing member; 34. extruding the propeller; 35. a pressure head; 4. a third lithium supplementing component; 101. an unreeling roller; 102. unreeling tension roller sets; 103. a step-up roller set; 104. a wind-up tension roller set; 105. a wind-up roll; 106. a pole piece deviation corrector; 107. a guide roller; 108. and a lithium supplementing mechanism.
Detailed Description
The application is described in further detail below with reference to fig. 1-3.
The embodiment of the application discloses a pole piece lithium supplementing device and a pole piece lithium supplementing method.
Referring to fig. 1, a pole piece lithium supplementing device sequentially comprises an unreeling roller 101, an unreeling tension roller set 102, a plurality of step-up roller sets 103, a reeling tension roller set 104 and a reeling roller 105 according to the upstream and downstream of a procedure. The pole foil 1 is unreeled in the unreeling roller 101, is reeled in the reeling roller 105, and pole piece deviation correcting devices 106 are respectively arranged at the outlet of the unreeling roller 101 and the inlet of the reeling roller 105 so as to ensure the accurate position of the pole foil 1. A plurality of guide rollers 107 are respectively arranged between the rollers and the roller groups to form a continuous and tensioned conveying path for conveying the cathode rolled foil 1. The pole foil 1 is guided to form a multilayer, level-stacked, level-transported horizontal section upstream and downstream of the step-up roll set 103, which step-up roll set 103 is one in this embodiment, with three sections forming the upper, middle and lower layers.
The pole roll foil 1 comprises a current collector (not shown in the figure) and coating layers (not shown in the figure), wherein the coating layers are symmetrically coated on two surfaces of the current collector. The current collector can be various sheet metal foils, and the coating layer is powder graphite (or silicon, silica, silicon carbon or a mixture of graphite and silicon), a binder and a conductive agent, and is dry powder coated according to a certain formula proportion and thickness.
The step-up roller set 103 includes three step-up rollers, after the pole rolled foil 1 bypasses the three step-up rollers, the pole rolled foil 1 forms a turn-over that faces up and down, and the surface of the lowest horizontal section of the pole rolled foil 1, which faces up, is set as a face, so that the a face of the horizontal section of the middle layer, where the pole rolled foil 1 is located, faces down.
The lithium supplementing mechanism 108 can be arranged above each horizontal section, and in this embodiment, the lithium supplementing mechanism 108 is arranged above the horizontal sections of the lower layer and the middle layer.
The lithium supplementing mechanism 108 comprises a first lithium supplementing component 2, a second lithium supplementing component 3 and a third lithium supplementing component 4, wherein the first lithium supplementing component 2 is used for puncturing pits on the surface of the pole roll foil 1, the second lithium supplementing component 3 is used for paving lithium materials on the surface of the pole roll foil 1, and the third lithium supplementing component 4 is used for pressing the lithium materials into the pits by extruding the surface of the pole roll foil 1 and extruding the punctured materials into the pits, so that the pits are filled and covered.
The first lithium supplementing assembly 2 comprises a first roller 21 and burrs 22, the burrs 22 are distributed on the surface of the first roller 21 according to the distribution state of the requirements, the length of the burrs 22 determines the pit depth, and the first lithium supplementing assembly 2 can be replaced according to the requirements. Therefore, the depth of the pits can be controlled by controlling the length of the burrs 22, and the density of the pits can be controlled by controlling the number of the burrs 22 or the rotating speed of the first roller 21, so that the effects of controlling the lithium content and the lithium material embedding depth of the pole-rolled foil 1 in unit length are achieved.
Referring to fig. 1 and 2, the second lithium supplementing assembly 3 includes a sleeve 31, an atmosphere box 32, and an organic bath box 33, which are sequentially communicated with one another from right to top.
Referring to fig. 2 and 3, the sleeve 31 includes an inner cylinder 311 and an outer cylinder 312 nested with each other, the inner cavity of the inner cylinder 311 is a filling cavity 313, and the filling cavity 313 is used for filling a lithium source, which is typically a lithium block or a lithium rod. The extrusion pusher 34 is disposed above the filling cavity 313, and the extrusion pusher 34 may be any mechanism with progressive pushing power, such as an electric cylinder, a progressive cylinder, etc., where, for example, the body of the electric cylinder may be fixed with the outer cylinder 312 or may be fixed with a matching mounting frame. The piston rod of the electric cylinder can be plugged into the sleeve 31 and provided with a pressure head 35 at the end which can form a seal with the inner wall of the inner cylinder 311. The lower opening of the inner cylinder 311 is connected with the atmosphere box 32 and provided with a screen 314, and the screen 314 is 3000-5000 meshes. The extrusion pusher 34 can extrude the lithium source downwards through the press head 35, and the lithium source is divided into spherical or spheroid lithium cores with the diameter of 3-5 microns when passing through the screen 314. The lithium nuclei then fall by gravity and pass through the atmosphere box 32.
The ventilation cavity 315 is formed between the outer cylinder 312 and the inner cylinder 311, the ventilation cavity 315 is closed at the top of the outer cylinder 312, and the air tap 316 capable of ventilating the ventilation cavity 315 is arranged at the top or the side wall of the upper part of the outer cylinder 312, in order to reduce interference with the extrusion propeller 34, the embodiment takes the side wall of the outer cylinder 312 as an example where the air tap 316 is positioned. The upper portion of the vent chamber 315 is provided with a spacer 317 to spiral the upper passage of the vent chamber 315 to uniformly disperse the lower gas of the vent chamber 315. The lower end of the outer cylinder 312 is fixed to the atmosphere box 32, and a plurality of vent holes 321 are provided in the atmosphere box 32 at positions corresponding to the vent chambers 315, and the vent holes 321 communicate with the inner chamber of the atmosphere box 32. During use, nitrogen can be continuously introduced into the atmosphere box 32 through the air tap 316, so that the atmosphere box 32 is filled with nitrogen. The lithium core, when passing through the atmosphere box 32, chemically reacts on the outer surface to form an inorganic buffer layer, and the material of the inorganic buffer layer is Li3N. In the process, the input flow rate of nitrogen is kept at 5-100 mL/min, and the reaction speed is basically consistent with the reaction speed of absorbing nitrogen by the lithium core. The lithium nuclei then fall into the organic bath 33.
The organic bath box 33 is internally provided with a ethylene carbonate solution with the temperature of 30-45 ℃, the side wall of the organic bath box 33 is provided with a liquid inlet pipe 331, and the ethylene carbonate solution can be continuously input into the organic bath box 33 through the liquid inlet pipe 331. The temperature of the solution in the organic bath tank 33 may be controlled by heating the solution during or before feeding the solution of ethyl carbonate, or by providing a thermal sensor and a heater in the organic bath tank 33. The bottom of the organic bath tank 33 is inclined downwards and is close to the cross section of the middle part, and the middle part of the bottom of the organic bath tank 33 is lowest and is provided with a liquid outlet 332.
A swing rod 333 is arranged in the organic bath tank 33, a rotating shaft 334 is fixed on the side wall of the swing rod 333, and the rotating shaft 334 penetrates through the side wall of the organic bath tank 33 and is in rotary sealing connection with the organic bath tank 33. One end of the swing rod 333 is fixed with a sealing hammer 335, the end surface of the sealing hammer 335 is a cambered surface and is tangent to the inner surface of the bottom of the organic bath tank 33, and when the sealing hammer 335 is in a sagging state, the liquid outlet 332 is closed. The swing rod 333 is internally provided with an air outlet channel 3331, the swing rod 333 penetrates through the sealing hammer 335 and is provided with an opening of the air outlet channel 3331 on the cambered surface of the sealing hammer 335, and the swing rod 333 is also provided with an opening of the air outlet channel 3331 at a position far away from the sealing hammer 335. During the initial stages of operation of the entire apparatus, the sealing ram 335 remains closed to the liquid outlet 332, forcing air (mainly oxygen in the air) out through the air outlet channel 3331 by the nitrogen gas continuously introduced from the sleeve 31. In this process, the ethylene carbonate solution can be normally fed and does not flow out from the liquid outlet 332, and the rising of the liquid level of the ethylene carbonate solution can discharge air together with the filling of nitrogen. After a period of time, the space above the atmosphere box 32 and the ethylene carbonate solution is an atmosphere of high nitrogen concentration. The sealing hammer 335 can then be rotated upward to open the liquid outlet 332.
The inner wall of the organic bath 33 is fixed with a baffle 336 located above the swing rod 333, one end of the swing rod 333 away from the sealing hammer 335 is arranged at intervals with the baffle 336, when the sealing hammer 335 rotates upwards, the arc-shaped end surface of the sealing hammer 335 approaches or abuts against the baffle 336, and the baffle 336 seals the opening of the air outlet channel 3331 of the swing rod 333 with one end of the sealing hammer 335. Thus, when the sealing hammer 335 swings upwards, the liquid outlet 332 is opened and normal liquid discharging is performed, the lower end of the swing rod 333 is immersed in the ethylene carbonate solution, the air outlet channel 3331 is closed, and nitrogen gas is not discharged. At this time, the lithium core impregnated with the ethylene carbonate is also discharged with the ethylene carbonate. At this time, if the external temperature is kept low, the lithium core temperature after impregnating the ethylene carbonate can be reduced to 20-28 ℃, and the ethylene carbonate can form a spherical organic coating layer under the drive of the free energy on the surface when being cooled.
For the rotation power of the swing rod 333, a driven gear 337 is fixed on the portion of the rotating shaft 334 located on the outer wall of the organic bath tank 33, a driving gear 338 is rotatably connected on the outer wall of the organic bath tank 33, and the driving gear 338 is meshed with the driven gear 337. The side wall of the driving gear 338 is fixed with a convex column 3381, the outside of the organic bath box 33 is provided with a pushing piece 339, in this embodiment, the pushing piece 339 is an air cylinder, in other embodiments, an electric cylinder can also be used, the body of the pushing piece 339 can be hinged to the side wall of the organic bath box 33, and can also be a certain external frame body, and the output end of the pushing piece 339 is rotationally connected with the convex column 3381. In this way, the pushing member 339 can drive the driving gear 338 to rotate, and the rotation range of the swing rod 333 can be set by setting the transmission ratio of the driving gear 338 to the driven gear 337 and the angular range of the driving gear 338 driven by the pushing member 339. In this embodiment, the swing lever 333 is rotated by 180 °, i.e., the sealing hammer 335 can swing back and forth between the bottom end and the top end.
Referring to fig. 1, in this embodiment, the third lithium supplementing assembly 4 is a press roller, the surface of the press roller may also have ring grooves arranged regularly, and in other embodiments, the third lithium supplementing assembly 4 may also be a plurality of rollers spaced side by side. The surface of the actual calender roll for crushing can be correspondingly arranged according to the arrangement of the burrs 22.
The embodiment of the application also discloses a pole piece lithium supplementing method.
A pole piece lithium supplementing method comprises the following steps:
referring to fig. 1, a pole roll foil 1 is unreeled and wound at another place; the pole roll foil 1 at least forms two side channels on the transmission path, so that the pole roll foil 1 forms three layers of upper, middle and lower layers in space, and each layer is horizontally transmitted. The middle layer and the lower layer of the pole roll foil 1 are respectively right-side up and back-side up. The lithium supplementing mechanism 108 is arranged in the area between every two layers, and the lithium supplementing mechanism 108 supplements lithium to the surface of the electrode roll foil 1 below. The lithium supplementing mechanism 108 comprises a first lithium supplementing component 2, a second lithium supplementing component 3 and a third lithium supplementing component 4, and the pole roll foil 1 sequentially passes through the first lithium supplementing component 2, the second lithium supplementing component 3 and the third lithium supplementing component 4 in the transmission process.
Wherein, the first lithium supplementing component 2 is provided with a pit on the surface of the polar roll foil 1, and dressing produced by the pit is positioned near the pit.
The second lithium supplementing component 3 releases a ethylene carbonate solution containing lithium cores to the surface of the pole-rolled foil 1, the temperature of the ethylene carbonate solution is 30-45 ℃ during release, and the environmental temperature of the pole-rolled foil 1 is lower than 28 ℃.
The third lithium supplementing component 4 is rolled on the surface of the pole roll foil 1, so that lithium particles, ethylene carbonate solution and dressing are filled into the pits and flattened. After flattening or in the falling process of the lithium cores, the temperature of the lithium cores immersed in the ethylene carbonate solution is reduced to 20-28 ℃, the ethylene carbonate forms a spherical organic coating layer under the drive of free energy on the surface when in cooling, and the spherical structure after coating is the lithium particles. And if the ethylene carbonate solution is reduced to below 28 ℃ after being flattened, a layer of ethylene carbonate film is formed on the surface of the pole-rolled foil, the ethylene carbonate film is covered, the performance of the battery core of the pole-rolled foil is not affected, and in the process of supplementing lithium to the lithium battery, the ethylene carbonate film can be dissolved into the electrolyte as a part of the electrolyte.
The forming process of the lithium particles in the second lithium supplementing component 3 is as follows:
the preparation stage:
the sealing hammer 335 maintains a seal against the liquid outlet 332 and forces air (primarily oxygen in the air) out through the air outlet passageway 3331 by the constant introduction of nitrogen from the sleeve 31. In this process, the ethylene carbonate solution can be normally fed and does not flow out from the liquid outlet 332, and the rising of the liquid level of the ethylene carbonate solution can discharge air together with the filling of nitrogen. After a period of time, the space above the atmosphere box 32 and the ethylene carbonate solution is an atmosphere of high nitrogen concentration.
Working phase:
and extruding the solid lithium from the screen 314 in an extrusion mode under a closed environment to form a lithium core, wherein the diameter of the lithium core is 3-5 microns. The lithium core falls through the atmosphere box 32, and the lithium core chemically reacts under the nitrogen atmosphere condition of normal temperature and normal pressure to generate an inorganic buffer layer, wherein the inorganic buffer layer is Li3N. At this time, the nitrogen gas is kept at an input flow rate of 5 to 100mL/min, and the inflow rate of the nitrogen gas is substantially identical to the absorption rate of the lithium-ion battery check nitrogen gas.
Then the lithium core with the inorganic buffer layer falls into an organic bath box 33, and the organic bath box 33 is filled with a 30-45 ℃ ethylene carbonate solution. After the lithium core in the organic bath 33 reaches a set amount. Rotating the sealing hammer 335 upward; simultaneously, the extremely rolled foil 1 starts to be transported, the lithium cores continuously remain falling, nitrogen continuously remains input, and the ethylene carbonate solution also continuously inputs. The ethylene carbonate solution containing lithium cores is continuously released to the surface of the pole roll foil 1.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (8)
1. The utility model provides a pole piece moisturizing device which characterized in that: the lithium supplementing device comprises an unreeling roller (101) for unreeling a pole roll foil (1), a reeling roller (105) for reeling the pole roll foil (1), wherein a plurality of groups of lithium supplementing mechanisms (108) are arranged on a path from unreeling to reeling of the pole roll foil (1), and each lithium supplementing mechanism (108) comprises a first lithium supplementing component (2) for punching pits on the surface of the pole roll foil (1), a second lithium supplementing component (3) for paving lithium materials on the surface of the pole roll foil (1) and a third lithium supplementing component (4) for extruding the surface with the pits of the pole roll foil (1); the second lithium supplementing assembly (3) comprises a sleeve (31), an atmosphere box (32) and an organic bath box (33) which are sequentially communicated with each other, an outlet of the sleeve (31) is connected with the atmosphere box (32) and is provided with a screen (314), a lithium source can be filled in the sleeve (31), an inlet of the sleeve (31) is provided with an extrusion propeller (34) for pushing the lithium source into the screen (314), and the atmosphere box (32) is provided with an air inlet hole communicated with an inner cavity of the atmosphere box (32); the sleeve (31) comprises an inner cylinder (311) and an outer cylinder (312) which are mutually nested, the inner cavity of the inner cylinder (311) is a filling cavity (313), and the filling cavity (313) is used for filling a lithium source; a ventilation cavity (315) is formed between the outer cylinder (312) and the inner cylinder (311), the ventilation cavity (315) is sealed at the top of the outer cylinder (312), an air tap (316) capable of ventilating the ventilation cavity (315) is arranged at the top or the side wall of the upper part of the outer cylinder (312), and a spacer (317) is arranged at the upper part of the ventilation cavity (315), so that the upper channel of the ventilation cavity (315) is spiral; the lower end of the outer cylinder (312) is fixed with the atmosphere box (32), a plurality of vent holes (321) are arranged at positions of the atmosphere box (32) corresponding to the vent cavities (315), and the vent holes (321) are communicated with the inner cavity of the atmosphere box (32); the side wall of the organic bath box (33) is provided with a liquid inlet pipe (331); a swing rod (333) is arranged in the organic bath box (33), a rotating shaft (334) is fixed on the side wall of the swing rod (333), and the rotating shaft (334) penetrates through the side wall of the organic bath box (33) and is in rotary sealing connection with the organic bath box (33); one end of the swing rod (333) is fixed with a sealing hammer (335), the end surface of the sealing hammer (335) is a cambered surface and is tangential to the inner surface of the bottom of the organic bath box (33), and when the sealing hammer (335) is in a sagging state, the liquid outlet (332) is closed; the swing rod (333) is internally provided with an air outlet channel (3331), the swing rod (333) penetrates through the sealing hammer (335) and is provided with an opening of the air outlet channel (3331) on the cambered surface of the sealing hammer (335), and the swing rod (333) is also provided with an opening of the air outlet channel (3331) at a position far away from the sealing hammer (335).
2. The pole piece lithium supplementing device of claim 1, wherein: the first lithium supplementing assembly (2) comprises a first roller (21), and burrs (22) are arranged on the surface of the first roller (21).
3. The pole piece lithium supplementing device of claim 1, wherein: the lithium supplementing device at least comprises two groups of lithium supplementing mechanisms (108), the lithium supplementing mechanisms (108) are located above the pole winding foil (1) at corresponding positions, the group of lithium supplementing mechanisms (108) located at the upstream are arranged as a first group of lithium supplementing mechanisms (108), the upward surface of the pole winding foil (1) located at the first group of lithium supplementing mechanisms (108) is arranged as an A surface, and a lifting roller group (103) for guiding the pole winding foil (1) to the second group of lithium supplementing mechanisms (108) is arranged between the two groups of lithium supplementing mechanisms (108).
4. A pole piece lithium supplementing device according to claim 3, wherein: the lithium supplementing device comprises a plurality of guide rollers (107), a plurality of layers of stacked layers are formed by the guide rollers (107) and the guide pole foil (1) of the step-up roller group (103), and the lithium supplementing mechanism (108) is positioned between the adjacent two layers of pole foil (1).
5. The pole piece lithium supplementing device of claim 1, wherein: the process position between the unreeling roller (101) and the lithium supplementing mechanism (108) is provided with an unreeling tension roller set (102), a pole piece deviation corrector (106) is arranged between the unreeling tension roller set (102) and the unreeling roller (101), and a reeling tension roller set (104) is arranged between the lithium supplementing mechanism (108) and the reeling roller (105).
6. A pole piece lithium supplementing method is characterized in that: the method comprises the following steps:
unreeling the pole-rolled foil (1) and reeling at the other position; a lithium supplementing mechanism (108) is arranged on a transmission path of the pole-rolled foil (1), pits are punched on the surface of the pole-rolled foil (1) by the lithium supplementing mechanism (108), then an organic solution with lithium cores is released to the surface of the pole-rolled foil (1) with the pits, and then the lithium cores, an organic solvent and dressing generated by punching the pits are filled into the pits and flattened through rolling, wherein the organic solvent can be solidified when the temperature is reduced to a certain value, and an organic coating layer is formed outside the lithium cores;
the lithium supplementing mechanism (108) releases the lithium supplement: extruding solid lithium in a closed environment to form granular lithium cores, chemically reacting the lithium cores under a certain atmosphere condition to generate an inorganic buffer layer, and then entering a 30-45 ℃ ethylene carbonate solution; the environmental temperature of the pole-rolled foil (1) is lower than 28 ℃, the temperature of the lithium core after being immersed in the ethylene carbonate solution is reduced to 20-28 ℃, and the ethylene carbonate forms an organic coating layer for the lithium core with an inorganic buffer layer under the drive of free energy on the surface when being cooled.
7. The method for supplementing lithium to a pole piece according to claim 6, wherein: the diameter of the lithium core is 3-5 microns, the lithium core is extruded from a screen (314) in an extrusion mode through a lithium rod, the thickness of the organic coating layer is 0.3-3 microns, the certain atmosphere condition is nitrogen, the flow rate of the nitrogen is 5-100 mL/min, and the inorganic buffer layer is Li3N.
8. The method for supplementing lithium to a pole piece of claim 7, wherein the method comprises the steps of: the screen (314) is 3000-5000 meshes, and the temperature and the pressure of the atmosphere condition are normal temperature and normal pressure.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760863A (en) * | 2012-07-09 | 2012-10-31 | 湖北中能锂电科技有限公司 | Puncturing process for baseband of lithium ion battery pole pieces |
| CN106410120A (en) * | 2016-10-27 | 2017-02-15 | 东莞塔菲尔新能源科技有限公司 | Method for supplementing lithium to lithium ion battery pole piece |
| CN107359307A (en) * | 2013-10-08 | 2017-11-17 | 东莞新能源科技有限公司 | Electrodes of lithium-ion batteries mends lithium device |
| CN207558931U (en) * | 2017-12-21 | 2018-06-29 | 宁德时代新能源科技股份有限公司 | Mend lithium device |
| CN111430723A (en) * | 2020-04-26 | 2020-07-17 | 天津市捷威动力工业有限公司 | Lithium-supplementing current collector, preparation method and application thereof, negative pole piece and lithium ion battery |
| CN112420975A (en) * | 2020-10-20 | 2021-02-26 | 浙江南都电源动力股份有限公司 | Production method of electrode plate in battery |
| CN113130842A (en) * | 2021-04-09 | 2021-07-16 | 星恒电源股份有限公司 | Copper foil and preparation method thereof, pole piece containing copper foil and lithium ion battery |
-
2022
- 2022-03-08 CN CN202210227927.3A patent/CN114937757B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760863A (en) * | 2012-07-09 | 2012-10-31 | 湖北中能锂电科技有限公司 | Puncturing process for baseband of lithium ion battery pole pieces |
| CN107359307A (en) * | 2013-10-08 | 2017-11-17 | 东莞新能源科技有限公司 | Electrodes of lithium-ion batteries mends lithium device |
| CN106410120A (en) * | 2016-10-27 | 2017-02-15 | 东莞塔菲尔新能源科技有限公司 | Method for supplementing lithium to lithium ion battery pole piece |
| CN207558931U (en) * | 2017-12-21 | 2018-06-29 | 宁德时代新能源科技股份有限公司 | Mend lithium device |
| CN111430723A (en) * | 2020-04-26 | 2020-07-17 | 天津市捷威动力工业有限公司 | Lithium-supplementing current collector, preparation method and application thereof, negative pole piece and lithium ion battery |
| CN112420975A (en) * | 2020-10-20 | 2021-02-26 | 浙江南都电源动力股份有限公司 | Production method of electrode plate in battery |
| CN113130842A (en) * | 2021-04-09 | 2021-07-16 | 星恒电源股份有限公司 | Copper foil and preparation method thereof, pole piece containing copper foil and lithium ion battery |
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