CN114178132A - Coating system and coating method thereof - Google Patents

Coating system and coating method thereof Download PDF

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Publication number
CN114178132A
CN114178132A CN202111357963.3A CN202111357963A CN114178132A CN 114178132 A CN114178132 A CN 114178132A CN 202111357963 A CN202111357963 A CN 202111357963A CN 114178132 A CN114178132 A CN 114178132A
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Prior art keywords
coating
carrier
powder
material conveying
signal
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CN202111357963.3A
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CN114178132B (en
Inventor
彭建林
许玉山
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Shenzhen Manst Technology Co Ltd
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Shenzhen Manst Technology Co Ltd
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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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0245—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work for applying liquid or other fluent material to a moving work of indefinite length, e.g. to a moving web
    • 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
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1007—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material
    • 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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/403—Manufacturing processes of separators, membranes or diaphragms
    • 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)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)

Abstract

The invention discloses a coating system and a coating method thereof, wherein the coating system comprises a mixing device, a material conveying device, a shunting coating device and a rolling device, wherein the mixing device is used for mixing various raw materials of dispersed coating; the material conveying device is communicated with the material mixing device; the material conveying device is used for driving the coating to flow; the shunt coating device is communicated with the material conveying device; the shunt coating device is used for shunting the coating and uniformly coating the coating on the carrier; the rolling device is used for compacting the coating on the carrier. The invention provides a coating system and a coating method thereof, which solve the problem that coatings such as high-viscosity slurry or powder materials are difficult to coat.

Description

Coating system and coating method thereof
Technical Field
The invention relates to the technical field of coating machines, in particular to a coating system and a coating method thereof.
Background
In recent years, as lithium batteries are increasingly used in various industries, people have higher requirements on the performance of the lithium batteries. In the production process of the anode material, the cathode material and the diaphragm of the lithium battery, a step of coating slurry on the material belt is required, and the coating effect of the slurry can directly influence the capacity, safety and other performances of the battery.
The high-viscosity slurry generally has high solid content and poor fluidity, and the low-viscosity slurry generally has low solid content and good fluidity. Compared with two kinds of sizing agents with high viscosity and low viscosity, the sizing agent mainly adopts low-viscosity coating in the market at present, and the low-viscosity coating is mainly due to good low-viscosity fluidity and good coating performance. However, low viscosity coating involves a baking process, which requires a large expenditure of equipment and energy costs due to its high solvent content. The high viscosity slurry or direct powder coating can greatly reduce the baking cost, and compared with the coating of the traditional low viscosity slurry, the high viscosity slurry and the powder material have poor fluidity and continuity, so that the coating is difficult.
Disclosure of Invention
The invention mainly aims to provide a coating system and a coating method thereof, aiming at solving the problem that coatings such as high-viscosity slurry or powder materials are difficult to coat.
To achieve the above object, the present invention provides a coating system comprising:
the mixing device is used for mixing various raw materials of the dispersed coating;
the material conveying device is communicated with the material mixing device; the material conveying device is used for driving the coating to flow;
the shunt coating device is communicated with the material conveying device; the shunting coating device is used for shunting the coating and uniformly coating the coating on the carrier; and
and the rolling device is used for compacting the coating on the carrier.
Optionally, the coating system further comprises:
and the control assembly is connected with the shunting coating device and is used for controlling the shunting coating device to work.
Optionally, the split-flow coating device comprises an extrusion coating die head and a coating back roller, the extrusion coating die head is communicated with the material conveying device, the extrusion coating die head is in signal connection with the control component and is used for uniformly coating the coating on the carrier under the control of the control component, and the coating back roller is used for supporting the carrier during coating of the extrusion coating die head.
Optionally, the shunt coating device comprises a first temperature sensor in signal connection with the control assembly, and the first temperature sensor is arranged on the extrusion coating die head;
the first temperature sensor is used for detecting a first coating material temperature signal at the extrusion coating die head;
the control component is used for controlling the extrusion coating die head to work according to the first coating temperature signal; and/or
The shunting coating device comprises a first pressure sensor in signal connection with the control assembly, and the first pressure sensor is arranged on the extrusion coating die head and used for detecting a first coating pressure signal at the extrusion coating die head;
the control component is used for controlling the extrusion coating die head to work according to the first coating pressure signal; and/or
The shunt coating device comprises a liquid mass meter in signal connection with the control assembly, and the liquid mass meter is arranged on the extrusion coating die head and used for detecting a coating mass signal at the extrusion coating die head;
the control component is used for controlling the extrusion coating die head to work according to the coating quality signal.
Optionally, the coating system further comprises:
the metering device is arranged between the material conveying device and the shunting coating device, is connected with the control assembly and is used for weighing the coating in the material conveying device under the control of the control assembly and is matched with the material conveying device to convey the coating with target flow to the shunting coating device.
Optionally, the metering device comprises a fluid metering device and a delivery pump which are respectively connected with the control assembly, the fluid metering device is arranged on a delivery pipeline communicating the delivery device with the shunt coating device, a feed end of the delivery pump is communicated with the delivery device, and a discharge end of the delivery pump is communicated with the shunt coating device;
the fluid meter is used for detecting a flow signal flowing into the shunt coating device;
the control component is also used for controlling the material conveying pump to work according to the flow signal.
Optionally, the metering device further comprises an anemometer, the anemometer is in signal connection with the control assembly, and the anemometer is arranged on a material conveying pipeline communicating the material conveying device with the shunt coating device;
the flow velocity meter is used for detecting a flow velocity signal flowing into the shunt coating device;
the control component is also used for controlling the feed delivery pump to work according to the flow rate signal; and/or
The second temperature sensor is in signal connection with the control assembly and is arranged on a material conveying pipeline communicated with the material conveying device and the shunt coating device;
the second temperature sensor is used for detecting a second coating temperature signal flowing into the shunt coating device;
the control component is also used for controlling the material conveying pump to work according to the second coating temperature signal; and/or
The second pressure sensor is in signal connection with the control assembly and is arranged on a material conveying pipeline communicated with the material conveying device and the shunt coating device;
the second pressure sensor is used for detecting a second coating pressure signal flowing into the shunt coating device;
and the control component is also used for controlling the material conveying pump to work according to the second coating pressure signal.
Optionally, the feed delivery pump is a screw pump.
Optionally, the rolling device has at least one set of rollers.
Optionally, the rolling device further comprises a heating element, the heating element is arranged on the rolling roller and connected with the control component, so as to heat the carrier coated with the coating under the control of the control component; and/or
The heating member is arranged on the compression roller and connected with the control assembly, so that the vibration treatment is carried out on the carrier coated with the coating under the control of the control assembly.
In order to achieve the above object, the present invention also proposes a coating method of a coating system, the coating method comprising the steps of:
s10, mixing the raw materials of the powder;
s20, coating the uniformly mixed powder on a carrier to form a powder coating layer;
s30, compacting the powder coating layer on the carrier to shape the powder coating layer on the carrier;
and S40, heating and pressing the powder coating layer on the carrier to manufacture the electrode.
Optionally, step S20 includes:
s211, coating at least one layer of adhesive on the carrier to form an adhesive layer;
s212, spraying the powder onto the adhesive layer to form the powder coating layer; or
Step S20 includes:
s221, shaping and coating the uniformly mixed powder on the carrier through a fixed die to form the powder coating layer; or
Step S20 includes:
s231, laying the uniformly mixed powder on the carrier to form the powder coating layer; or
Step S20 includes:
s241, connecting the carrier with a power management device to enable the carrier to be positively or negatively charged;
s242, connecting the powder with the power management device to enable the powder to have charges opposite to those of the carrier;
and S243, adsorbing the powder on the carrier by utilizing the attraction of positive and negative charges to form the powder coating layer.
Optionally, before step S10, the method further includes:
and S09, when the coating is a blocky slurry, crushing the slurry to obtain the powder.
In order to achieve the above object, the present invention also provides a coating method of a coating system, the coating method comprising the steps of:
s100, mixing raw materials of the slurry;
s200, coating the uniformly mixed slurry on a carrier to form a slurry coating layer;
s300, compacting the slurry coating layer on the carrier to shape the slurry coating layer on the carrier;
s400, cutting and/or grinding the shaped powder coating layer;
s500, heating and pressing the slurry coating layer on the carrier to manufacture the electrode.
In the technical scheme of the invention, the coating system comprises a mixing device, a material conveying device, a shunting coating device and a rolling device, wherein the mixing device is used for mixing various raw materials of dispersed coating; the material conveying device is communicated with the material mixing device; the material conveying device is used for driving the coating to flow; the shunt coating device is communicated with the material conveying device; the shunt coating device is used for uniformly coating the coating on the carrier; the rolling device is used for compacting the coating on the carrier. It can be understood that the high-viscosity slurry or powder material and other coatings are distributed by adopting the distribution coating device, the coating amount of the coatings is controlled, the coatings are uniformly distributed in the transverse direction and the longitudinal direction of the carrier, and the coatings on the carrier are compacted by utilizing the rolling device, so that the problem of difficulty in coating the high-viscosity slurry or powder material and other coatings is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of an embodiment of a coating system of the present invention;
FIG. 2 is a diagram of a control system for an embodiment of the coating system of the present invention;
FIG. 3 is a schematic flow chart of an embodiment of a coating method of the coating system of the present invention;
FIG. 4 is a schematic flow chart of another embodiment of the coating method of the coating system of the present invention.
The reference numbers illustrate:
10. a mixing device; 20. a feeding device; 30. a shunt coating device; 40. a rolling device; 50. a metering device; 60. a control component; 310. a coating die head; 320. coating a back roll; 31. a first temperature sensor; 32. a first pressure sensor; 33. a liquid mass meter; 51. a fluid meter; 52. a delivery pump; 53. a flow rate meter; 54. a second temperature sensor; 55. a second pressure sensor; 41. a heating member; 42. a vibrating member; 100. and (3) a carrier.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
In order to solve the problem that coatings such as high-viscosity slurry or powder materials are difficult to coat, the invention provides a coating system which is suitable for coating products to be processed of a battery pole piece, wherein the coatings can be high-viscosity slurry or powder materials and the like, and can also be other coatings with low viscosity, flowability and continuity, and the coating system is not limited in the above.
Referring to fig. 1, in an embodiment of the present invention, the coating system includes a mixing device 10, a feeding device 20, a split coating device 30, and a rolling device 40, wherein the mixing device 10 is used for mixing various raw materials of a dispersed coating; the material conveying device 20 is communicated with the material mixing device 10; the material conveying device 20 is used for driving the paint to flow; the diversion coating device 30 is communicated with the material conveying device 20; the split coating device 30 is used to split the coating and uniformly apply it to the carrier 100; the rolling device 40 is used to compact the coating on the carrier 100.
The mixing device 10 is mainly used for mixing and dispersing various raw materials to uniformly mix the raw materials; for the slurry with high viscosity, solid-liquid mixing and dispersing equipment can be adopted, and for the powder, powder mixing and dispersing equipment can be adopted. In this embodiment, the mixing device 10 may include a mixing tank and a stirring member disposed in the mixing tank, and the stirring member is used to perform mixing and dispersing processing on various raw materials of the coating.
Because the fluidity and the continuity of the high-viscosity slurry and the powder material are poor, an additional power device is needed in the material transportation process. For high-viscosity slurry, a double-screw pump and the like can be adopted, a screw extrusion device and the like can provide power for conveying the slurry, and additional functions such as defoaming, heating, filtering, tapping and the like can be added; and powder conveying equipment can be adopted for the powder, so that the deposition and blockage of the powder are avoided. In this embodiment, the feeding device 20 may include a feeding pump 52, the feeding port of the feeding pump 52 may be connected to the mixing tank via a fluid line, and the discharging port of the feeding pump 52 may be connected to the split coating device 30 via a fluid line. The material delivery pump 52 may be a screw pump or a gear pump, etc. to smoothly deliver the slurry to the split coating device 30.
The split coating apparatus 30 may include a coating die 310, a coating backing roll 320, a flow meter, and the like, and is not particularly limited herein. The split coating device 30 mainly functions to uniformly apply the applied coating material on the carrier 100. For high viscosity slurries, the split-flow coating system is primarily an extrusion coating die 310 or other device that can be homogenized, and for powders, a dispersion coating apparatus can be used. The split coating device 30 can be added with functions of temperature control, pressure control, quality adjustment, and the like.
The main function of the rolling device 40 is to compact the coating material on the carrier 100, homogenize the coating material again, and dry, shape, compact, etc. the coating material. It can be composed of one or more groups of compression rollers, and can increase the auxiliary functions of heating, vibration, edge folding and the like.
In the technical scheme of the invention, the coating system comprises a mixing device 10, a material conveying device 20, a split-flow coating device 30 and a rolling device 40, wherein the mixing device 10 is used for mixing various raw materials of dispersed coating; the material conveying device 20 is communicated with the material mixing device 10; the material conveying device 20 is used for driving the paint to flow; the diversion coating device 30 is communicated with the material conveying device 20; the split coating device 30 is used to uniformly apply the coating material to the carrier 100; the rolling device 40 is used to compact the coating on the carrier 100. It can be understood that the coating amount of the coating material is controlled by dividing the coating material such as the high viscosity paste or the powder material by the divided coating device 30 so as to be uniformly distributed in the transverse and longitudinal directions of the carrier 100, and the coating material on the carrier 100 is compacted by the rolling device 40, thereby solving the problem of difficulty in coating the coating material such as the high viscosity paste or the powder material.
In order to further reduce the difficulty of coating the coating materials such as the high viscosity slurry or the powder material, and to achieve automation operation and improve the processing efficiency, in an embodiment, as shown in fig. 2, the coating system may further include a control assembly 60, and the control assembly 60 is connected to the split flow coating device 30 for controlling the split flow coating device 30 to operate.
In this embodiment, the controller of the control component 60 may be an electronic device such as a single chip, a DSP, an FPGA, or the like, and is not limited herein.
Based on the above embodiments, further, in one embodiment, as shown in fig. 1 and fig. 2, the split coating apparatus 30 may include a extrusion coating die 310 and a coating back roll 320, the extrusion coating die 310 is communicated with the material conveying apparatus 20, the extrusion coating die 310 is in signal connection with the control assembly 60 for uniformly applying the coating material onto the carrier 100 under the control of the control assembly 60, and the coating back roll 320 is used for supporting the carrier 100 when the extrusion coating die 310 is applied.
As shown in fig. 2, in the present embodiment, the split coating apparatus 30 may include a first temperature sensor 31 in signal connection with the control component 60, wherein the first temperature sensor 31 is disposed at the extrusion coating die head 310; a first temperature sensor 31 for detecting a first coating material temperature signal at the extrusion coating die 310; and a control assembly 60 for controlling the operation of the extrusion coating die 310 according to the first coating temperature signal.
When the first temperature sensor 31 detects that the current temperature of the slurry at the extrusion coating die head 310 is lower than a first preset temperature value, the controller may control the extrusion coating die head 310 to increase the extrusion pressure, so that the coating can be uniformly coated on the carrier 100, or control the heating device or the thermal circulation device to heat the slurry, and increase the slurry temperature until it reaches a target temperature value, thereby improving the coating effect. When the first temperature sensor 31 detects that the current temperature of the slurry at the extrusion coating die head 310 is higher than the second preset temperature value, the controller may control the extrusion coating die head 310 to reduce the extrusion pressure, so that the coating can be uniformly coated on the carrier 100, or control the heating device or the thermal circulation device to heat the slurry, and raise the temperature of the slurry until it reaches the target temperature value, thereby improving the coating effect.
The target temperature value is a better value which is beneficial to flowing, coating, drying and the like of the coating, the specific value can be obtained according to experimental tests, and the target temperature values of the coatings of different coating products can be different. The first preset temperature value may be less than or equal to the target temperature value, and the second preset temperature value may be greater than or equal to the target temperature value.
As shown in fig. 2, in the present embodiment, the split coating apparatus 30 may also include a first pressure sensor 32 in signal connection with the control component 60, wherein the first pressure sensor 32 is disposed at the extrusion coating die head 310 and is used for detecting a first coating material pressure signal at the extrusion coating die head 310; and a control assembly 60 for controlling the operation of the extrusion coating die 310 according to the first coating pressure signal.
When the first pressure sensor 32 detects that the current pressure of the slurry at the extrusion coating die head 310 is lower than the first preset pressure value, the controller may control the extrusion coating die head 310 to increase the extrusion pressure degree until it reaches the target pressure value, so that the coating can be uniformly coated on the carrier 100, and the coating effect is improved. When the first pressure sensor 32 detects that the current pressure of the slurry at the extrusion coating die head 310 is higher than the second preset pressure value, the controller may control the extrusion coating die head 310 to decrease the extrusion pressure until it reaches the target pressure value, so that the coating can be uniformly coated on the carrier 100, thereby improving the coating effect.
The target pressure value is a better value which is beneficial to flowing, coating, drying and the like of the coating, specific numerical values of the target pressure value can be obtained according to experimental tests, and the target temperature values of the coatings of different coating products can be different. The first preset pressure value may be less than or equal to the target pressure value, and the second preset pressure value may be greater than or equal to the target pressure value.
Further, as shown in fig. 2, in an embodiment, the split coating apparatus 30 may further include a liquid mass meter 33 in signal connection with the control assembly 60, wherein the liquid mass meter 33 is disposed at the extrusion coating die 310 and is used for detecting a coating mass signal at the extrusion coating die 310; and a control assembly 60 for controlling the operation of the extrusion coating die 310 according to the coating quality signal.
When the liquid mass meter 33 detects that the current coating mass of the slurry at the extrusion coating die 310 is lower than the first preset mass value, the controller may control the extrusion coating die 310 to increase the liquid mass until it reaches the target mass value, so that the coating can be uniformly coated on the carrier 100, improving the coating effect. When the liquid mass meter 33 detects that the current coating mass of the slurry at the extrusion coating die 310 is higher than the second preset mass value, the controller may control the extrusion coating die 310 to decrease the liquid mass until it reaches the target mass value, so that the coating can be uniformly coated on the carrier 100, improving the coating effect.
The target quality value is a better value which is beneficial to flowing, coating, drying and the like of the coating, specific numerical values can be obtained according to experimental tests, and the target quality values of the coatings of different coating products can be different. The first predetermined quality value may be less than or equal to the target quality value and the second predetermined quality value may be greater than or equal to the target quality value.
In order to further improve the coating effect of the high viscosity slurry or powder material and reduce the coating difficulty, in an embodiment, referring to fig. 1 and 2, the coating system may further include a metering device 50, the metering device 50 is disposed between the material delivery device 20 and the diversion coating device 30, the metering device 50 is connected to the control assembly 60 for weighing the coating material in the material delivery device 20 under the control of the control assembly 60 and delivering the coating material with a target flow rate to the diversion coating device 30 in cooperation with the material delivery device 20.
As shown in fig. 2, in the present embodiment, the metering device 50 may include a fluid meter 51 and a delivery pump 52 respectively connected to the control unit 60, the fluid meter 51 is disposed on a delivery conduit communicating the delivery device 20 and the diversion coating device 30, a feeding end of the delivery pump 52 is communicated with the delivery device 20, and a discharging end of the delivery pump 52 is communicated with the diversion coating device 30; a fluid meter 51 for detecting a flow rate signal flowing into the split coating device 30; and the control component 60 is also used for controlling the operation of the material conveying pump 52 according to the flow signal.
In the present embodiment, the liquid mass meter 33, the fluid meter 51, and the flow rate meter 53 may be flow meters, may be components that are provided independently and that only perform corresponding functions, or may be components that detect the mass, flow rate, and the like of the fluid using one component. The flow rate can be calculated according to a formula (flow rate is multiplied by the cross-sectional area of the feed delivery pipe), and the flow rate can also be calculated according to the formula; the mass can be calculated according to the formula (mass density x volume, volume cross-sectional area of the feed pipe x flow velocity x time).
Of course, in some other embodiments, as shown in fig. 2, the metering device 50 may further include a flow meter 53, the flow meter 53 is in signal connection with the control unit 60, and the flow meter 53 is disposed on the material conveying pipeline communicating the material conveying device 20 and the split coating device 30; a flow rate meter 53 for detecting a flow rate signal flowing into the divided flow coating device 30; the control component 60 is also used for controlling the operation of the material conveying pump 52 according to the flow rate signal; and/or a second temperature sensor 54, wherein the second temperature sensor 54 is in signal connection with the control component 60, and the second temperature sensor 54 is arranged on a material conveying pipeline for communicating the material conveying device 20 with the shunt coating device 30; a second temperature sensor 54 for detecting a second paint temperature signal flowing into the split coating device 30; the control component 60 is also used for controlling the operation of the material conveying pump 52 according to the second coating temperature signal; and/or a second pressure sensor 55, wherein the second pressure sensor 55 is in signal connection with the control component 60, and the second pressure sensor 55 is arranged on a material conveying pipeline for communicating the material conveying device 20 with the shunt coating device 30; a second pressure sensor 55 for detecting a second paint pressure signal flowing into the split coating device 30; and the control assembly 60 is also used for controlling the operation of the material conveying pump 52 according to the second coating pressure signal.
In an embodiment, as shown in fig. 2, the rolling device 40 may further include a heating member 41, the heating member 41 is disposed on the rolling roller and connected to the control component 60, for heating the coated carrier 100 under the control of the control component 60; and/or a vibrating member 42, the heating member 41 being provided on the pressing roller and connected to the control unit 60, for performing a vibration process on the coated carrier 100 under the control of the control unit 60. So set up, can realize toasting and handling such as moulding to the coating of coating, greatly promote the coating effect.
In order to solve the problem of difficult coating of the powder material, the invention also provides a coating method of the coating system, as shown in fig. 3, the coating method comprises the following steps:
s10, mixing the raw materials of the powder;
s20, coating the uniformly mixed powder on a carrier to form a powder coating layer;
s30, compacting the powder coating layer on the carrier to shape the powder coating layer on the carrier;
and S40, heating and pressing the powder coating layer on the carrier to manufacture the electrode.
The pressing, molding and shaping may be hot pressing or cold pressing, continuous rolling, or intermittent pressing; the carrier may be a temporary transfer carrier or a final electrode foil.
In this embodiment, the powder needs to be mixed until the powder is uniformly mixed, and then the uniformly mixed powder is coated on the carrier, and since the flowability of the powder material is poor, the powder coating layer can be pressed and shaped to be firmly adhered to the carrier, and then hot press shaping is performed. Thus, the problem that the powder material is difficult to coat is solved.
In order to coat the powder with poor flowability onto the carrier and ensure the uniform thickness of the powder coating layer, in one embodiment, the step S20 may include:
s211, coating at least one layer of adhesive on the carrier to form an adhesive layer;
and S212, spraying the powder onto the adhesive layer to form the powder coating layer.
In this embodiment, the adhesive is suitable for coating the powder material, and can improve the adhesive strength between the powder coating layer and the carrier, prevent the powder coating layer from falling off, and greatly prolong the service life of the electrode.
In one embodiment, step S20 may also include:
and S221, shaping and coating the uniformly mixed powder on the carrier through a fixed die to form the powder coating layer.
In this embodiment, through adopting specific fixed mould to coat the powder, fixed mould can attach functions such as control by temperature change, pressure control, quality control, can do benefit to the powder design to can make it coat to the carrier uniformly, promoted the stability of powder coating layer.
In one embodiment, step S20 may also include:
s231, spreading the uniformly mixed powder on the carrier to form the powder coating layer.
In this embodiment, a scraper or a special powder coating die can be used to lay the powder on the carrier, which can reduce the cost of manufacturing complex coating equipment and solve the problem of difficult coating of the powder material.
In an embodiment, step S20 may further include:
s241, connecting the carrier with a power management device to enable the carrier to be positively or negatively charged;
s242, connecting the powder with the power management device to enable the powder to have charges opposite to those of the carrier;
and S243, adsorbing the powder on the carrier by utilizing the attraction of positive and negative charges to form the powder coating layer.
In the embodiment, the powder and the carrier are oppositely charged by utilizing the principle that charges are attracted by the same polarity, the powder is coated on the carrier, and then the powder is subjected to compression molding and hot press molding.
In order to solve the problem of difficulty in applying slurry with particularly poor fluidity, in an embodiment, before step S10, the method may further include:
and S09, when the coating is a blocky slurry, crushing the slurry to obtain the powder.
In this embodiment, the block-shaped coating material may be pulverized into powder, and then coated on the carrier according to the powder coating method, and then the processes of mixing, coating, press-forming, and hot press-forming may be sequentially performed thereon. Thus, the problem that the slurry having particularly poor fluidity is difficult to coat can be solved.
In order to solve the problem of difficult application of the high viscosity slurry, the invention also provides an application method of the application system, as shown in fig. 4, the application method comprises the following steps:
s100, mixing raw materials of the slurry;
s200, coating the uniformly mixed slurry on a carrier to form a slurry coating layer;
s300, compacting the slurry coating layer on the carrier to shape the slurry coating layer on the carrier;
s400, cutting and/or grinding the shaped powder coating layer;
s500, heating and pressing the slurry coating layer on the carrier to manufacture the electrode.
The pressing, molding and shaping may be hot pressing or cold pressing, continuous rolling, or intermittent pressing; the carrier may be a temporary transfer carrier or a final electrode foil.
In this embodiment, for the slurry with high solid content, different coating methods can be adopted according to the fluidity, specifically as follows:
for the slurry biased to the semi-liquid state, the slurry can be easily extruded and molded through a die and then is subjected to extrusion molding;
for the slurry biased to be semi-solid, the semi-solid coating can be formed by scraping the semi-solid coating on the substrate through a scraper, and then the semi-solid coating is formed by pressing;
the slurry with better deviation to the flowing state can be manufactured according to the traditional extrusion coating process;
for slurry with extremely poor fluidity, the blocky mixed material can be powdered and then shaped by a powder coating hair method;
for slurry with poor fluidity, the slurry with poor fluidity can be pressed and formed by high pressure force, the method can press thicker coatings, and thinner coatings are easy to crush;
for slurry with poor fluidity, the slurry can be shaped by pressure and then shaped and shaped by cutting and/or grinding. Wherein the cutting and/or grinding can improve the uniformity of the slurry coating, thereby improving the quality of the motor.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (14)

1. A coating system, comprising:
the mixing device is used for mixing various raw materials of the dispersed coating;
the material conveying device is communicated with the material mixing device; the material conveying device is used for driving the coating to flow;
the shunt coating device is communicated with the material conveying device; the shunting coating device is used for shunting the coating and uniformly coating the coating on the carrier; and
and the rolling device is used for compacting the coating on the carrier.
2. The coating system of claim 1, further comprising:
and the control assembly is connected with the shunting coating device and is used for controlling the shunting coating device to work.
3. The coating system of claim 2 wherein said manifold coating means includes an extrusion coating die in communication with said delivery means, said extrusion coating die in signal communication with said control assembly for uniformly applying coating material to the carrier under the control of said control assembly, and a coating backing roll for supporting the carrier during coating by said extrusion coating die.
4. The coating system of claim 3 wherein said split coating apparatus includes a first temperature sensor in signal communication with said control assembly, said first temperature sensor being disposed in said extrusion coating die;
the first temperature sensor is used for detecting a first coating material temperature signal at the extrusion coating die head;
the control component is used for controlling the extrusion coating die head to work according to the first coating temperature signal; and/or
The shunting coating device comprises a first pressure sensor in signal connection with the control assembly, and the first pressure sensor is arranged on the extrusion coating die head and used for detecting a first coating pressure signal at the extrusion coating die head;
the control component is used for controlling the extrusion coating die head to work according to the first coating pressure signal; and/or
The shunt coating device comprises a liquid mass meter in signal connection with the control assembly, and the liquid mass meter is arranged on the extrusion coating die head and used for detecting a coating mass signal at the extrusion coating die head;
the control component is used for controlling the extrusion coating die head to work according to the coating quality signal.
5. The coating system of claim 2, further comprising:
the metering device is arranged between the material conveying device and the shunting coating device, is connected with the control assembly and is used for weighing the coating in the material conveying device under the control of the control assembly and is matched with the material conveying device to convey the coating with target flow to the shunting coating device.
6. The coating system of claim 5, wherein said metering device comprises a fluid meter and a delivery pump connected to said control assembly, respectively, said fluid meter being disposed in a delivery conduit communicating said delivery device with said split coating device, said delivery pump having an inlet end communicating with said delivery device and an outlet end communicating with said split coating device;
the fluid meter is used for detecting a flow signal flowing into the shunt coating device;
the control component is also used for controlling the material conveying pump to work according to the flow signal.
7. The coating system of claim 6 wherein said metering device further comprises an odometer in signal communication with said control assembly, said odometer being disposed in a delivery conduit communicating said delivery device with said split coating device;
the flow velocity meter is used for detecting a flow velocity signal flowing into the shunt coating device;
the control component is also used for controlling the feed delivery pump to work according to the flow rate signal; and/or
The second temperature sensor is in signal connection with the control assembly and is arranged on a material conveying pipeline communicated with the material conveying device and the shunt coating device;
the second temperature sensor is used for detecting a second coating temperature signal flowing into the shunt coating device;
the control component is also used for controlling the material conveying pump to work according to the second coating temperature signal; and/or
The second pressure sensor is in signal connection with the control assembly and is arranged on a material conveying pipeline communicated with the material conveying device and the shunt coating device;
the second pressure sensor is used for detecting a second coating pressure signal flowing into the shunt coating device;
and the control component is also used for controlling the material conveying pump to work according to the second coating pressure signal.
8. A coating system as claimed in any one of claims 6 or 7, wherein the delivery pump is a screw pump.
9. The coating system of claim 2 wherein said roller assembly has at least one set of rollers.
10. The coating system of claim 9, wherein the roll press further comprises a heating element disposed on the roll and connected to the control assembly for heating the coated carrier under the control of the control assembly; and/or
The heating member is arranged on the compression roller and connected with the control assembly, so that the vibration treatment is carried out on the carrier coated with the coating under the control of the control assembly.
11. A method of coating a coating system, comprising the steps of:
s10, mixing the raw materials of the powder;
s20, coating the uniformly mixed powder on a carrier to form a powder coating layer;
s30, compacting the powder coating layer on the carrier to shape the powder coating layer on the carrier;
and S40, heating and pressing the powder coating layer on the carrier to manufacture the electrode.
12. The method of claim 11, wherein the step S20 includes:
s211, coating at least one layer of adhesive on the carrier to form an adhesive layer;
s212, spraying the powder onto the adhesive layer to form the powder coating layer; or
Step S20 includes:
s221, shaping and coating the uniformly mixed powder on the carrier through a fixed die to form the powder coating layer; or
Step S20 includes:
s231, laying the uniformly mixed powder on the carrier to form the powder coating layer; or
Step S20 includes:
s241, connecting the carrier with a power management device to enable the carrier to be positively or negatively charged;
s242, connecting the powder with the power management device to enable the powder to have charges opposite to those of the carrier;
and S243, adsorbing the powder on the carrier by utilizing the attraction of positive and negative charges to form the powder coating layer.
13. The method of coating a coating system according to any one of claims 11 or 12, further comprising, before step S10:
and S09, when the coating is a blocky slurry, crushing the slurry to obtain the powder.
14. A method of coating a coating system, comprising the steps of:
s100, mixing raw materials of the slurry;
s200, coating the uniformly mixed slurry on a carrier to form a slurry coating layer;
s300, compacting the slurry coating layer on the carrier to shape the slurry coating layer on the carrier;
s400, cutting and/or grinding the shaped powder coating layer;
s500, heating and pressing the slurry coating layer on the carrier to manufacture the electrode.
CN202111357963.3A 2021-11-16 2021-11-16 Coating system and coating method thereof Active CN114178132B (en)

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CN1541781A (en) * 2003-05-01 2004-11-03 精工爱普生株式会社 Coating device, film forming method and device, making method of semiconductor elements, electric lighting device and electronic apparatus
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