CN113751283B - Lithium battery pole piece/diaphragm coating equipment - Google Patents
Lithium battery pole piece/diaphragm coating equipment Download PDFInfo
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- CN113751283B CN113751283B CN202111031448.6A CN202111031448A CN113751283B CN 113751283 B CN113751283 B CN 113751283B CN 202111031448 A CN202111031448 A CN 202111031448A CN 113751283 B CN113751283 B CN 113751283B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
- B05C9/14—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C13/00—Means for manipulating or holding work, e.g. for separate articles
- B05C13/02—Means for manipulating or holding work, e.g. for separate articles for particular articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C15/00—Enclosures for apparatus; Booths
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/0263—After-treatment with IR heaters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/029—After-treatment with microwaves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0466—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being a non-reacting gas
- B05D3/0473—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being a non-reacting gas for heating, e.g. vapour heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0493—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases using vacuum
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses lithium battery pole piece/diaphragm coating equipment, which comprises a coating machine body and a tail gas treatment mechanism, wherein the coating machine body is provided with a closed high-pressure-resistant cavity, an unwinding mechanism, a coating mechanism and a winding mechanism are sequentially arranged in the cavity, a heating device for heating a coating in a radiation mode is arranged between the coating mechanism and the winding mechanism, the tail gas treatment mechanism comprises a primary condenser, a secondary condenser, a gas-liquid separator, a vacuum buffer tank and a vacuum pump which are sequentially connected through a vacuum tube, the gas-liquid separator is connected with a recovered solvent storage tank through a liquid separation tube, the coating machine body is provided with a tail gas extraction port communicated with the cavity, and the tail gas extraction port is connected with the primary condenser through the vacuum tube; and a lithium battery pole piece/diaphragm coating process: s1, filling nitrogen; s2, coating; s3, tail gas treatment; it can reduce energy consumption, reduce enterprise cost, and improve solvent recovery rate and product quality.
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to a lithium battery pole piece/diaphragm coating device.
Background
In general, in the manufacture of lithium batteries, a layer of polymer is coated on positive and negative electrode materials of the batteries, and the polymer material is dissolved by a solvent and then coated on the surfaces of electrode and separator sheet materials, and then the polymer material is dried to separate the solvent from the positive and negative electrode sheets. The principle of drying the pole piece and the diaphragm of the current coating machine is to dry the solvent on the surface of the pole piece or the diaphragm by using a convection heat transfer method and flowing air after heating, the existing scheme is drying under normal pressure and is carried out at higher temperature (usually 100-130 ℃), and the coating on the surface of the pole piece or the diaphragm can be deformed or cracked due to the rapid rise of the temperature. The dried solvent-containing waste gas usually needs to be cooled for recovery or subjected to adsorption treatment. The weight of air in the waste gas generated by drying is about 150-300 times of the weight of the solvent gas. The convection drying method uses a lot of energy to heat air and cool waste gas, and has the characteristics of large energy consumption and difficult treatment of waste gas. In the prior art, a large amount of air needs to be heated and cooled, so that equipment for heating and exchanging heat for the air is large in size, more air pipes are arranged, and the investment cost is high. And the air contains water vapor, the existing method also ensures that the water content in the condensed and recovered solvent is higher, so that the energy consumption of the subsequent solvent purification process is higher, the water vapor in the air can react with the anode active material (such as ternary material, lithium iron phosphate, lithium cobaltate and the like), and the capacity of the battery is reduced. The existing scheme also enables oxygen in the air to oxidize the surface of the battery pole piece at a higher temperature, so that the conductivity of the electrode is reduced, and further the high-rate discharge performance of the battery is reduced.
Disclosure of Invention
In view of the above, the present invention provides a lithium battery electrode plate/separator coating apparatus, which can reduce energy consumption, reduce enterprise cost, and improve solvent recovery rate and product quality.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a lithium battery pole piece diaphragm coating equipment, includes coating machine body and tail gas processing mechanism, the coating machine body is equipped with a sealed high pressure resistant cavity, be equipped with unwinding mechanism, coating mechanism and winding mechanism in the cavity in proper order, be equipped with the heating device who carries out the heating to the coating through the mode of radiation between coating mechanism and the winding mechanism, tail gas processing mechanism includes one-level condenser, second grade condenser, vapour and liquid separator, vacuum buffer tank and the vacuum pump that connects gradually through the vacuum tube, vapour and liquid separator connects through dividing the liquid pipe and retrieves the solvent storage tank, be equipped with the tail gas pump-out mouth with the cavity intercommunication on the coating machine body, the tail gas pump-out mouth passes through the vacuum tube and is connected with the one-level condenser.
As a preferred scheme, the coating machine further comprises a nitrogen purging mechanism, a nitrogen purging inlet communicated with the cavity is formed in the coating machine body, and the nitrogen purging inlet is connected with the nitrogen purging mechanism through a nitrogen pipe.
As a preferable scheme, the heating device is a microwave heating pipe or an infrared heating pipe.
As a preferable scheme, a slurry stirring tank for providing slurry is arranged outside the cavity, and the slurry stirring tank is connected with the coating mechanism through a slurry pipeline.
As a preferred scheme, a guide roller for guiding the moving direction of the coil stock is arranged in the cavity.
As a preferred scheme, a combustible gas concentration detector and an oxygen concentration detector are arranged in the cavity.
As an optimal scheme, be equipped with first dust-proof heat insulating barrier and second dust-proof heat insulating barrier in the cavity, form the heating chamber between first dust-proof heat insulating barrier and the second dust-proof heat insulating barrier, the both ends in heating chamber form coating chamber and rolling chamber respectively, heating device sets up at the heating intracavity, unwinding mechanism and coating mechanism set up at the coating intracavity, winding mechanism sets up at the rolling intracavity, set up the through-hole that supplies the coil stock to pass through on first dust-proof heat insulating barrier and the second dust-proof heat insulating barrier.
As a preferred scheme, the side wall of the coating machine body is provided with a bin door for debugging and taking and placing the coil stock, and the bin door is provided with a transparent observation window for observing the appearance of the coil stock in the coating process.
A lithium battery pole piece diaphragm coating process comprises the following steps:
s1, filling nitrogen: starting a nitrogen purging mechanism, purging and replacing air in the cavity of the coating machine, and exhausting air in the cavity through a vacuum pump;
s2, coating: after the pressure in the body cavity of the coating machine reaches a set vacuum degree and is stable, the unwinding mechanism starts unwinding, coating is carried out in the coating cavity, the coating is heated in the heating cavity in an infrared or microwave radiation heating mode, and the dried coil material is wound in the winding cavity;
s3, tail gas treatment: solvent waste gas generated by heating is pumped out of the cavity through a vacuum pump, and tail gas sequentially passes through the primary condenser, the secondary condenser and the gas-liquid separator.
As a preferable scheme, the unreeling speed during coating is 30-120 m/min, the heating temperature is 40-100 ℃, the first-stage condenser cools the tail gas in the vacuum tube by using circulating water at 30-35 ℃, and the second-stage condenser cools the tail gas in the vacuum tube by using chilled water at 8-12 ℃.
Compared with the prior art, the invention has obvious advantages and beneficial effects, and concretely, according to the technical scheme, the unwinding mechanism, the coating mechanism and the winding mechanism are arranged in the closed high-pressure-resistant cavity, the cavity is divided into the coating cavity, the heating cavity and the winding cavity by the two dust-isolating heat-insulating baffles, and the heating device for heating the coating is arranged in the heating cavity.
To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention.
The attached drawings indicate the following:
10. a coating machine body; 11. a cavity; 111. a heating cavity; 112. a coating chamber; 113. a winding cavity; 12. a heating device; 13. a tail gas extraction port; 14. a nitrogen purge inlet; 15. a guide roller; 16. a combustible gas concentration detector; 17. an oxygen concentration detector; 18. a first dust-proof heat-insulating baffle; 19. a second dust-proof heat-insulating baffle; 20. a tail gas treatment mechanism; 21. a first-stage condenser; 22. a secondary condenser; 23. a gas-liquid separator; 24. a recovered solvent storage tank; 25. a vacuum buffer tank; 26; a vacuum pump; 27. a vacuum tube; 28. a liquid separating pipe; 30. an unwinding mechanism; 40. a coating mechanism; 50. a winding mechanism; 60. a slurry stirring tank; 70. and (6) rolling.
Detailed Description
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the positions or elements referred to must have specific orientations, be constructed and operated in specific orientations, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
Referring to fig. 1, a specific structure of an embodiment of the present invention is shown, including a coater body 10 and a tail gas treatment mechanism 20, where the coater body 10 is provided with a closed high-pressure-resistant cavity 11, an unwinding mechanism 30, a coating mechanism 40, and a winding mechanism 50 are sequentially arranged in the cavity 11, a plurality of heating devices 12 for heating a coating layer in a radiation manner are arranged between the coating mechanism 40 and the winding mechanism 50, the tail gas treatment mechanism 20 includes a primary condenser 21, a secondary condenser 22, a gas-liquid separator 23, a vacuum buffer tank 25, and a vacuum pump 26, which are sequentially connected by a vacuum tube 27, the gas-liquid separator 23 is connected to a recovered solvent storage tank 24 by a liquid separation tube 28, the coater body 10 is provided with a tail gas extraction outlet 13 communicated with the cavity 11, and the tail gas extraction outlet 13 is connected to the primary condenser 21 by a vacuum tube 27.
In this embodiment, the coating machine further includes a nitrogen purging mechanism, the coating machine body 10 is provided with a plurality of nitrogen purging inlets 14 communicated with the cavity 11, and the nitrogen purging inlets 14 are connected with the nitrogen purging mechanism through nitrogen pipes. The heating device 12 is a microwave heating tube or an infrared heating tube. A slurry stirring tank 60 for providing slurry is arranged outside the cavity 11, and the slurry stirring tank 60 is connected with the coating mechanism 40 through a slurry pipeline. A guide roller 15 for guiding the moving direction of the coil stock 70, a combustible gas concentration detector 16 and an oxygen concentration detector 17 are arranged in the cavity 11. Be equipped with first dust-proof heat insulating barrier 18 and second dust-proof heat insulating barrier 19 in the cavity 11, form heating chamber 111 between first dust-proof heat insulating barrier 18 and the second dust-proof heat insulating barrier 19, coating chamber 112 and rolling chamber 113 are formed respectively to the both ends of heating chamber 111, heating device 12 sets up in heating chamber 111, unwinding mechanism 30 and coating mechanism 40 set up in coating chamber 112, rolling mechanism 50 sets up in rolling chamber 113, set up the through-hole that supplies coil stock 70 to pass through on first dust-proof heat insulating barrier 18 and the second dust-proof heat insulating barrier 19. The side wall of the coating machine body 10 is provided with a bin door for debugging and taking and placing the coil stock 70, and the bin door is provided with a transparent observation window for observing the appearance of the coil stock 70 in the coating process.
A coating process for a lithium battery pole piece diaphragm comprises the following steps:
s1, filling nitrogen: starting a nitrogen purging mechanism, purging and replacing air in the coating machine cavity 11, and pumping air in the cavity 11 through a vacuum pump 26;
s2, coating: after the pressure in the coating machine body cavity 11 reaches a set vacuum degree and is stable, the unwinding mechanism 30 starts unwinding, coating is performed in the coating cavity 112, the coating is heated in the heating cavity 111 through an infrared or microwave radiation heating mode, and the dried coil stock 70 is wound in the winding cavity 113;
s3, tail gas treatment: the solvent off-gas generated by heating is pumped out of the chamber 11 by the vacuum pump 26, and the off-gas passes through the primary condenser 21, the secondary condenser 22, and the gas-liquid separator 23 in this order.
During coating, the unreeling speed is 30-120 m/min, the heating temperature is 40-100 ℃, the first-stage condenser 21 cools tail gas in the vacuum tube 27 by using circulating water at 30-35 ℃, and the second-stage condenser 22 cools tail gas in the vacuum tube 27 by using chilled water at 8-12 ℃.
According to the invention, by arranging the closed pressure-resistant coating equipment and using key technologies such as vacuum heating and vacuum drying, the energy consumption of the battery coil stock 70 during coating is greatly reduced, and tail gas is easier to treat. The side surface of the coating machine body 10 is provided with a bin door, the middle of the bin door is provided with an observation window, the appearance of the coil stock 70 in the coating process can be observed, and the coated coil stock 70 can be installed or taken out after the bin door is opened. A nitrogen purge inlet 14 is provided in the chamber 11 for purging and displacing gas therein. The cavity 11 is provided with a tail gas outlet 13 for exhausting the waste gas generated by drying into a condenser for condensation. The chamber 11 is provided with a heating device 12 for directly heating the coil stock 70 by radiation. A dust-proof heat-insulation baffle is arranged in the cavity 11 to separate energy dissipation of infrared radiation and dust at two ends of the winding and unwinding mechanism in the cavity 11.
During working, before the coating machine is started, the coil stock 70 is loaded, and then the bin gate is closed; starting a nitrogen purging mechanism to purge and replace air in the cavity 11; after the oxygen content is qualified, starting the vacuum pump 26 to pump the interior of the cavity 11, starting the heating device 12 after the pressure in the cavity 11 reaches a set vacuum degree and is stable, then starting to convey the slurry, coating the slurry on the flowing coil stock 70 through the coating mechanism 40, heating and drying the coated coil stock 70 by the heating device 12, wherein the unreeling speed of the coil stock 70 is between 30 and 120 m/min; the solvent waste gas generated by drying enters the first-stage condenser 21 and the second-stage condenser 22 in sequence under the vacuum suction force, and finally flows into a recovered solvent storage tank 24 after being respectively condensed by circulating water at the temperature of 30-35 ℃ and frozen water at the temperature of about 8-12 ℃ so as to realize the recovery of the solvent.
It should be noted that when drying the pole pieces, it is not recommended to use a microwave heating tube for heating; when the diaphragm is dried, the diaphragm can be heated by using a microwave heating pipe or an infrared heating pipe.
The invention reduces the vapor pressure of the solvent on the surface of the electrode during drying and accelerates the drying speed in a vacuum heating mode, the vacuum degree during drying is 0.01-0.095 MPa, and the surface temperature of the coil stock 70 only needs to be between 40-100 ℃ during drying. And after the coating is finished, stopping slurry conveying, starting a nitrogen purging mechanism to replace and purge the flammable solvent gas (purging is needed if the flammable solvent is used), closing the nitrogen purging mechanism after the replacement is finished, and continuously filling nitrogen until the pressure in the coating machine is normal pressure.
In conclusion, the invention can reduce energy consumption, reduce enterprise cost and improve solvent recovery rate and product quality.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (1)
1. The utility model provides a lithium-ion battery pole piece/diaphragm coating equipment which characterized in that: the coating machine comprises a coating machine body and a tail gas treatment mechanism, wherein the coating machine body is provided with a closed high-pressure-resistant cavity, an unwinding mechanism, a coating mechanism and a winding mechanism are sequentially arranged in the cavity, a plurality of heating devices for heating a coating in a radiation mode are arranged between the coating mechanism and the winding mechanism, the tail gas treatment mechanism comprises a primary condenser, a secondary condenser, a gas-liquid separator, a vacuum buffer tank and a vacuum pump which are sequentially connected through vacuum tubes, the gas-liquid separator is connected with a solvent recovery storage tank through a liquid separation tube, a tail gas extraction port communicated with the cavity is arranged on the coating machine body, and the tail gas extraction port is connected with the primary condenser through the vacuum tubes; the coating machine body is provided with a plurality of nitrogen purging inlets communicated with the cavity, and the nitrogen purging inlets are connected with the nitrogen purging mechanism through nitrogen pipes; the heating device is a microwave heating pipe or an infrared heating pipe; a slurry stirring tank for providing slurry is arranged outside the cavity and is connected with the coating mechanism through a slurry pipeline; a guide roller for guiding the direction of the coil stock in the belt moving direction, a combustible gas concentration detector and an oxygen concentration detector are arranged in the cavity; a first dust-proof heat-insulation baffle and a second dust-proof heat-insulation baffle are arranged in the cavity, a heating cavity is formed between the first dust-proof heat-insulation baffle and the second dust-proof heat-insulation baffle, a coating cavity and a winding cavity are formed at two ends of the heating cavity respectively, the heating device is arranged in the heating cavity, the unwinding mechanism and the coating mechanism are arranged in the coating cavity, the winding mechanism is arranged in the winding cavity, and through holes for roll materials to pass through are formed in the first dust-proof heat-insulation baffle and the second dust-proof heat-insulation baffle; the side wall of the coating machine body is provided with a bin door for debugging and taking and placing the coil stock, and the bin door is provided with a transparent observation window for observing the appearance of the coil stock in the coating process; a bin door is arranged on the side surface of the coating machine body, an observation window is arranged in the middle of the bin door, the appearance of the coil stock in the coating process is observed, and the coated coil stock is installed or taken out after the bin door is opened; a nitrogen purging inlet is arranged in the cavity and used for purging and replacing gas in the cavity; a tail gas extraction port is arranged in the cavity, and waste gas generated by drying is extracted into a condenser for condensation; a heating device is arranged in the cavity and directly heats the coil stock in a radiation mode; a dust-isolating heat-insulating baffle is arranged in the cavity to isolate energy dissipation of infrared radiation and dust at two ends of the winding and unwinding mechanism in the cavity; when the coating machine is used, the nitrogen purging mechanism is firstly started to purge and replace air in the cavity of the coating machine, and the cavity is pumped by the vacuum pump; then after the pressure in the body cavity of the coating machine reaches a set vacuum degree and is stable, the unwinding mechanism starts unwinding, coating is carried out in the coating cavity, the coating is heated in the heating cavity in an infrared or microwave radiation heating mode, and the dried coil material is wound in the winding cavity; extracting solvent waste gas generated by heating from the cavity through a vacuum pump, and enabling the tail gas to sequentially pass through a primary condenser, a secondary condenser and a gas-liquid separator; during coating, the unreeling speed is 30-120 m/min, the heating temperature is 40-100 ℃, the first-stage condenser uses circulating water at 30-35 ℃ to cool tail gas in the vacuum tube, and the second-stage condenser uses chilled water at 8-12 ℃ to cool the tail gas in the vacuum tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111031448.6A CN113751283B (en) | 2021-09-03 | 2021-09-03 | Lithium battery pole piece/diaphragm coating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111031448.6A CN113751283B (en) | 2021-09-03 | 2021-09-03 | Lithium battery pole piece/diaphragm coating equipment |
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| Publication Number | Publication Date |
|---|---|
| CN113751283A CN113751283A (en) | 2021-12-07 |
| CN113751283B true CN113751283B (en) | 2023-03-10 |
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| CN202111031448.6A Active CN113751283B (en) | 2021-09-03 | 2021-09-03 | Lithium battery pole piece/diaphragm coating equipment |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116618259A (en) * | 2022-02-10 | 2023-08-22 | 宁德时代新能源科技股份有限公司 | Pole piece heating device, pole piece production system and pole piece production method |
| CN114789103A (en) * | 2022-03-29 | 2022-07-26 | 宁德卓高新材料科技有限公司 | Online detection method for spraying thickness of diaphragm coating and coating system thereof |
| CN114789122B (en) * | 2022-04-12 | 2023-05-09 | 南京贝迪新材料科技股份有限公司 | Coating equipment for optical film production |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202878862U (en) * | 2012-09-17 | 2013-04-17 | 上海袭麟光学科技发展有限公司 | Air floating type clean optical thin film coating machine |
| CN103811720A (en) * | 2014-02-19 | 2014-05-21 | 邢台海裕锂能电池设备有限公司 | Device and method for preparing lithium-ion electrode diaphragm and modified isolating membrane |
| CN204122322U (en) * | 2014-09-05 | 2015-01-28 | 深圳市信宇人科技有限公司 | A kind of two-sided air supporting coating machine |
| CN105561725A (en) * | 2016-01-30 | 2016-05-11 | 泉州市天龙环境工程有限公司 | Waste water recycling device and method in VOCs waste gas recovery process |
| CN106334411A (en) * | 2016-10-21 | 2017-01-18 | 江苏智道工程技术有限公司 | Method and device for recovering organic waste gas in petrochemical industry |
| CN107670467A (en) * | 2017-11-10 | 2018-02-09 | 晋城天成化工有限公司 | A kind of Tail Gas from Manufacture of Rubber Vulcanization Accelerator M processing unit |
| CN112958392A (en) * | 2021-04-09 | 2021-06-15 | 湖南膜泉新材料有限公司 | Coating machine for insulating and isolating coating on surface of lithium ion battery pole piece |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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-
2021
- 2021-09-03 CN CN202111031448.6A patent/CN113751283B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202878862U (en) * | 2012-09-17 | 2013-04-17 | 上海袭麟光学科技发展有限公司 | Air floating type clean optical thin film coating machine |
| CN103811720A (en) * | 2014-02-19 | 2014-05-21 | 邢台海裕锂能电池设备有限公司 | Device and method for preparing lithium-ion electrode diaphragm and modified isolating membrane |
| CN204122322U (en) * | 2014-09-05 | 2015-01-28 | 深圳市信宇人科技有限公司 | A kind of two-sided air supporting coating machine |
| CN105561725A (en) * | 2016-01-30 | 2016-05-11 | 泉州市天龙环境工程有限公司 | Waste water recycling device and method in VOCs waste gas recovery process |
| CN106334411A (en) * | 2016-10-21 | 2017-01-18 | 江苏智道工程技术有限公司 | Method and device for recovering organic waste gas in petrochemical industry |
| CN107670467A (en) * | 2017-11-10 | 2018-02-09 | 晋城天成化工有限公司 | A kind of Tail Gas from Manufacture of Rubber Vulcanization Accelerator M processing unit |
| CN112958392A (en) * | 2021-04-09 | 2021-06-15 | 湖南膜泉新材料有限公司 | Coating machine for insulating and isolating coating on surface of lithium ion battery pole piece |
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