CN117960498A - Coating die head capable of automatically adjusting fluidity of hot slurry suitable for lithium battery production - Google Patents
Coating die head capable of automatically adjusting fluidity of hot slurry suitable for lithium battery production Download PDFInfo
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- CN117960498A CN117960498A CN202410184704.2A CN202410184704A CN117960498A CN 117960498 A CN117960498 A CN 117960498A CN 202410184704 A CN202410184704 A CN 202410184704A CN 117960498 A CN117960498 A CN 117960498A
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- 238000000576 coating method Methods 0.000 title claims abstract description 117
- 239000011248 coating agent Substances 0.000 title claims abstract description 89
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 54
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 32
- 239000002002 slurry Substances 0.000 title claims abstract description 29
- 239000011267 electrode slurry Substances 0.000 claims abstract description 99
- 230000033228 biological regulation Effects 0.000 claims abstract description 66
- 230000001105 regulatory effect Effects 0.000 claims abstract description 40
- 230000000694 effects Effects 0.000 claims abstract description 34
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 230000001276 controlling effect Effects 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000004364 calculation method Methods 0.000 claims description 9
- 238000005457 optimization Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000000518 rheometry Methods 0.000 claims description 3
- 239000002003 electrode paste Substances 0.000 description 7
- 230000003044 adaptive effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000007607 die coating method Methods 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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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
- B05C5/0254—Coating heads with slot-shaped outlet
- B05C5/0262—Coating heads with slot-shaped outlet adjustable in width, i.e. having lips movable relative to each other in order to modify the slot width, e.g. to close it
-
- 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
- B05C11/1005—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 already applied to the surface, e.g. coating thickness, weight or pattern
-
- 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
- B05C11/1013—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 responsive to flow or pressure of liquid or other fluent material
-
- 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
- B05C11/1042—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material provided with means for heating or cooling the liquid or other fluent material in the supplying means upstream of the applying apparatus
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
- H01M4/0402—Methods of deposition of the material
Landscapes
- 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)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model provides a coating die head that can automatically regulated hot slurry mobility suitable for lithium cell production, includes master control station, self-adaptation regulation and control system, goes up mould and lower mould, install the gasket between last mould and the lower mould, form the lip between last mould and the lower mould, go up the mould and install differential screw in the embedded type above the lip, go up the mould and install T type piece, self-adaptation regulation and control system includes differential screw adjustment module, feed inlet pressure adjustment module, temperature regulation module and feedback control module; the invention is provided with a self-adaptive regulation and control system, and the system can automatically adjust the fluidity and the coating effect of the electrode slurry by monitoring the real-time condition of the electrode slurry so as to ensure the optimal coating quality and uniformity; the double-adjusting structure comprises a differential screw and a T-shaped block, and the local slit size of the lip and the slit size formed by the gasket can be respectively adjusted, so that the surface density of the electrode slurry can be more flexibly controlled; can meet the requirements of different electrode slurries and provide more accurate control.
Description
Technical Field
The invention relates to the technical field of lithium ion battery production control systems and equipment, in particular to a coating die head capable of automatically adjusting hot slurry fluidity, which is suitable for lithium battery production.
Background
The single-layer upper die coating die head is a coating die applied to lithium battery production and is used for coating electrode slurry on current collectors of positive and negative electrodes of the battery, the single-layer upper die coating die head mainly has the effects of realizing uniform distribution of the electrode slurry, ensuring stability and performance of the electrode in the battery assembly process, adjusting the surface density of electrode materials by controlling coating thickness and uniformity so as to ensure performance and consistency of the battery, the existing single-adjusting mechanism always lacks an adaptive automatic control system in the process of adjusting the electrode slurry, and only manual adjusting equipment can be used, so that the single-layer upper die coating die head cannot be adjusted in time according to real-time conditions, flowability and coating effect of the electrode slurry are difficult to ensure, the adjusting process does not have flexibility and accuracy, and therefore, the accurate control cannot be performed according to the actual conditions of the electrode slurry, meanwhile, the existing mechanism is difficult to ensure that the coating thickness and uniformity meet the requirements, the uneven electrode thickness and the surface density are possibly not met, and in addition, the single-adjusting mechanism has some limitations in the aspect of adjusting the surface density of the electrode slurry, and the surface density is difficult to be adjusted to accurately meet the electrode density possibly also not met.
Disclosure of Invention
The invention provides a coating die head capable of automatically adjusting the fluidity of hot slurry, which is suitable for lithium battery production, and aims to solve the technical problems that the existing single-adjusting mechanism always lacks an adaptive automatic control system in the process of adjusting electrode slurry and can only rely on manual adjusting equipment, which means that the existing single-adjusting mechanism can not be adjusted in time according to real-time conditions and the fluidity and coating effect of the electrode slurry are difficult to ensure.
The technical scheme of the invention is realized as follows:
The utility model provides a coating die head that can automatically regulated hot slurry mobility suitable for lithium cell production, includes master control station, self-adaptation regulation and control system, goes up mould and lower mould, install the gasket between last mould and the lower mould, go up mould and lower mould and form the lip in rear junction, go up the mould and install differential screw in the embedded type above the lip, go up the mould and install T type piece, be provided with the micrometer on the T type piece, the lower mould front side is provided with the feed inlet, the inside die cavity that is provided with of lower mould;
The differential screw is connected with the motor and comprises a snap screw, and when the size of the lip slot is adjusted by the snap screw, the lip is extruded and deformed;
The self-adaptive regulation and control system comprises a differential screw regulation module, a feed inlet pressure regulation module, a temperature regulation module and a feedback control module, wherein the differential screw regulation module regulates the rotation number of the differential screw through a control motor to realize the position regulation of the differential screw so as to automatically regulate the size of the lip; the feed inlet pressure adjusting module is used for adjusting the feed pressure of the electrode slurry of the feed inlet in the coating process so as to control the coating uniformity; the temperature regulating module is used for monitoring and controlling the temperature of the electrode slurry in the coating process in real time so as to ensure that the electrode slurry has optimal fluidity and coating effect; the feedback control module monitors key parameters in the coating process in real time and feeds the data back to the main control console so as to adjust and optimize according to actual conditions.
The position of the T-shaped block extends downwards to the bottom of the upper die from the top of the upper die in a straight line, and the micrometer is connected with the T-shaped block through a coupler.
And when the micrometer controls the T-shaped block to move up and down to adjust the size of the lip slot, the lip is not extruded and deformed.
The number of the T-shaped blocks is adjusted according to the transverse lengths of the upper die and the lower die, and the number of the differential screws is adjusted according to the transverse lengths of the upper die and the lower die.
The feeding hole is connected with the die cavity, and a pressure sensor, a temperature sensor and a temperature adjusting pipeline are arranged in the feeding hole.
And a thickness sensor and a photoelectric sensor are also arranged between the upper die and the lower die.
The differential screw adjusting module accurately adjusts the position of the differential screw by controlling the rotation number and the speed of the motor in the coating process, and changes the position of the differential screw according to a preset value, so that the size of the lip is changed, the fluidity of electrode slurry and the optimization of the coating effect are ensured, and the coating requirements under different battery models and requirements are met;
The differential screw adjusting module calculates the angle of the differential screw to be rotated according to the fluidity and coating effect requirements of the electrode slurry, a calculation formula derives based on a rheology theory, coating process parameters and physical property parameters of the electrode slurry, a series of reference values including the optimal lip size, the viscosity and the flow velocity of the electrode slurry are set according to the fluidity requirements, and then the rotation angle of the differential screw is calculated according to preset values.
The pressure of the feeding port is monitored in real time by the pressure regulating module of the feeding port, the opening and closing degree of the pump of the feeding port is regulated in real time according to a preset numerical value and the feedback control module, so that the feeding pressure of the electrode slurry is controlled, and the uniform flow of the electrode slurry in the coating process can be ensured by precisely controlling the pressure of the feeding port, so that a stable and consistent coating effect is realized;
the feed inlet pressure regulating module calculates a control signal of a pump of the feed inlet according to rheological property and coating speed requirements of the electrode slurry and geometric parameters of the feed inlet and a die cavity, and a calculation formula is deduced based on a hydrodynamic theory and a hydrodynamic model and comprises a relation among fluid pressure, pipeline resistance and coating speed of the electrode slurry.
The temperature regulation module acquires temperature data of the electrode slurry by adopting a temperature sensor, and carries out feedback control on the temperature by a feedback control module, and adjusts the temperature of circulating water in a temperature regulation pipeline so as to realize accurate control on the temperature of the electrode slurry;
the temperature regulation module calculates a control signal to be provided according to the heat conduction characteristic of the electrode slurry, the power of equipment for heating and cooling circulating water and the structural parameters of a temperature regulation pipeline, and the calculation formula is deduced based on a heat conduction equation and a heat balance principle so as to ensure that the electrode slurry keeps proper temperature in the coating process.
The feedback control module monitors key parameters in the coating process in real time through the thickness sensor and the light sensor, including the thickness, the surface density and the coating speed of the electrode slurry, sends monitored key parameter data to the main control console, the data serve as feedback of actual conditions and are used for evaluating the current coating effect and performance, the main control console compares and analyzes the received feedback data with preset parameters, and the self-adaptive regulation and control system automatically adjusts the angle of the differential screw and the pressure of the feed inlet according to the comparison result so as to realize more optimized coating effect and performance;
The feedback control module is used for constructing a feedback loop through monitoring key parameters in real time and comparing the key parameters with an expected target, enabling the self-adaptive regulation and control system to continuously adjust, calculating an error value at the same time, evaluating the state and performance deviation of the current self-adaptive regulation and control system, automatically adjusting the key parameters by using a PID control algorithm according to the error value, and finally adjusting and optimizing the parameters in the control algorithm according to actual conditions and requirements so as to obtain the optimal control effect and stability.
Compared with the prior art, the invention has the beneficial effects that:
(1) Automatically adjusting the fluidity of hot slurry: compared with the traditional manual adjustment method, the invention is provided with the self-adaptive regulation and control system, and the system can automatically adjust the fluidity and the coating effect of the electrode slurry by monitoring the real-time condition of the electrode slurry so as to ensure the optimal coating quality and uniformity.
(2) Has a double adjusting structure: the double-adjusting structure comprises a differential screw and a T-shaped block, and the local slit size of the lip and the slit size formed by the gasket can be respectively adjusted, so that the surface density of the electrode slurry can be more flexibly controlled.
(3) Accurate control and regulation capability: the main control console and the self-adaptive regulation and control system allow accurate control and adjustment of the coating process, which means that the coating thickness, the surface density and the flow rate can be flexibly adjusted according to different preset requirements and conditions, so that the production requirements of lithium batteries of different types are met.
(4) Real-time feedback and adjustment: the coating die head is provided with a thickness sensor and a photoelectric sensor for monitoring key parameters including the thickness, the surface density and the movement speed of the electrode slurry in real time, and the data are sent to the self-adaptive regulation and control system through the feedback control module for evaluating the coating effect and performance and carrying out corresponding adjustment and optimization according to the requirement.
(5) Flexibility and stability: can adapt to the characteristics and requirements of different electrode slurries, provide more flexible and accurate coating control, and can ensure the coating thickness and uniformity to meet the requirements by automatically adjusting the fluidity, the pressure and the temperature of hot slurry, thereby improving the consistency and the stability of production.
Drawings
FIG. 1 is a schematic diagram of an adaptive modulation system according to the present invention;
FIG. 2 is a schematic diagram of a coating die head (without a main control console) capable of automatically adjusting fluidity of hot slurry, which is suitable for lithium battery production;
FIG. 3 is a front view of a coating die head capable of automatically adjusting hot slurry fluidity suitable for lithium battery production according to the present invention;
FIG. 4 is a top view of a coating die head capable of automatically adjusting hot slurry fluidity suitable for lithium battery production according to the present invention;
FIG. 5 is a left side view of a coating die head capable of automatically adjusting hot slurry fluidity suitable for lithium battery production according to the present invention;
fig. 6 is a schematic diagram showing the internal structure of a coating die head capable of automatically adjusting the fluidity of hot slurry, which is suitable for the production of lithium batteries.
1-A main control platform; 2-upper die; 3-lower die; 4-a gasket; 5-lips; 6-a differential screw; 7-T-shaped blocks; 8-micrometer; 9-a feed inlet; 10-a die cavity; 11-an electric motor; 12-a pressure sensor; 13-a temperature sensor; 14-a temperature regulating pipeline; 15-an adaptive regulation and control system; 16-a differential screw adjustment module; 17-a feed inlet pressure regulating module; 18-a temperature regulation module; 19-a feedback control module.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus consistent with some aspects of the disclosure as detailed in the accompanying claims.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 6, a coating die head capable of automatically adjusting fluidity of hot slurry suitable for lithium battery production comprises a main control console 1, a self-adaptive control system 15, an upper die 2 and a lower die 3, wherein the self-adaptive control system 15 is regulated out by the main control console 1 to control the production process, the upper die 2 is a trapezoid body with a narrow upper surface and a wide lower surface, the upper die 2 and the lower die 3 are core components of coating equipment, a gasket 4 is arranged between the upper die 2 and the lower die 3, the gasket 4 is used for adjusting flow of electrode slurry during lithium battery production, the gasket 4 has different production models and can be replaced according to production requirements, a lip 5 is formed at the joint of the upper die 2 and the lower die 3 at the rear, the lip 5 is responsible for uniformly discharging the electrode slurry for coating, a differential screw 6 is arranged above the lip 5 in an embedded manner, the differential screw 6 is used for adjusting the surface density during lithium battery production, the differential screw 6 is connected with a motor 11, the motor 11 is used for adjusting the rotation number of the differential screw 6, the differential screw 6 comprises a snap screw, when the differential screw 6 adjusts the slit size of the lip 5 through the snap screw, the lip 5 is extruded and deformed, the upper die 2 is provided with a T-shaped block 7, the position of the T-shaped block 7 extends downwards to the bottom of the upper die 2 from the top of the upper die 2 in a straight line, the T-shaped block 7 is used for changing the slit size formed by a gasket 4, thereby changing the local flow size of the lip 5 during lithium battery production, a micrometer 8 is arranged on the T-shaped block 7, the micrometer 8 is connected with the T-shaped block 7 through a coupler, the micrometer 8 is used for adjusting the vertical position of the T-shaped block 7, the micrometer 8 controls the T-shaped block 7 to move up and down, and the slit size of the lip 5 can also be adjusted, therefore, the purpose of controlling the surface density of the electrode slurry is achieved, when the micrometer 8 controls the T-shaped block 7 to move up and down to adjust the size of the slit of the lip 5, the lip 5 is not extruded and deformed, the front side of the lower die 3 is provided with a feed port 9, the feed port 9 is internally provided with a pressure sensor 12, a temperature sensor 13 and a temperature adjusting pipeline 14, the pressure sensor 12 is used for detecting the pressure parameter of the feed port 9, the temperature sensor 13 is used for detecting the temperature parameter of the feed port 9, the temperature adjusting pipeline 14 is used for adjusting the temperature of the electrode slurry in the feed port 9 through circulating water with different temperatures, a thickness sensor (not shown) and a photoelectric sensor (not shown) are further arranged between the upper die 2 and the lower die 3, the thickness sensor is used for acquiring the thickness data of the electrode slurry, the mass of the electrode slurry is obtained through weighing and is compared with the known area to calculate the surface density, the movement speed of the electrode slurry is measured by the photoelectric sensor, the feed port 9 is used for conveying the electrode slurry into the lower die 3, the lower die 3 is internally provided with the liquid state slurry 10, and then the liquid state slurry is conveyed to the die cavity 5 through the die cavity 10, and the die cavity 10 is connected with the die cavity 5, and the pressure of the pressure is stabilized.
The number of the T-shaped blocks 7 is adjusted according to the transverse length of the upper die 2 and the lower die 3, the number of the T-shaped blocks can be increased or reduced according to the precision requirement of the adjustment area, and the number of the differential screws 6 is adjusted according to the transverse length of the upper die 2 and the lower die 3, and the number of the T-shaped blocks can be increased or reduced according to the precision requirement of the adjustment area.
The self-adaptive regulation and control system 15 comprises a differential screw regulating module 16, a feed inlet pressure regulating module 17 and a temperature regulating module 18, wherein the differential screw regulating module 16 regulates the rotation number of the differential screw 6 through controlling the motor 11 to realize the position regulation of the differential screw 6 so as to automatically regulate the size of the lip 5; the feed inlet pressure adjusting module 17 is used for adjusting the feed pressure of the electrode slurry of the feed inlet 9 in the coating process so as to control the coating uniformity; the temperature adjusting module 18 is used for monitoring and controlling the temperature of the electrode slurry in the coating process in real time so as to ensure that the electrode slurry has optimal fluidity and coating effect; the feedback control module 19 monitors key parameters in the coating process in real time and feeds the data back to the main control console 1 so as to adjust and optimize according to actual conditions.
The differential screw adjusting module 16 precisely adjusts the position of the differential screw 6 by controlling the rotation number and the speed of the motor 11 during the coating process, and changes the position of the differential screw 6 according to a preset value, thereby changing the size of the lip 5, ensuring the optimal fluidity and the coating effect of the electrode paste, so as to meet the coating requirements under different battery models and requirements;
The differential screw adjusting module 16 calculates the angle of the differential screw 6 to be rotated according to the fluidity and coating effect requirements of the electrode paste, the calculation formula derives based on the rheology theory, the coating process parameters and the physical parameters of the electrode paste, a series of reference values including the optimal lip 5 size, the viscosity and the flow rate of the electrode paste are set according to the fluidity requirements, and then the rotation angle of the differential screw 6 is calculated according to the preset values.
The pressure of the feeding port 9 is monitored in real time by the pressure sensor 12, the opening and closing degree of a pump of the feeding port 9 is regulated in real time according to a preset value and the feedback control module 19, so that the feeding pressure of the electrode slurry is controlled, and the uniform flow of the electrode slurry in the coating process can be ensured by accurately controlling the pressure of the feeding port 9, so that a stable and consistent coating effect is realized;
The feed inlet pressure regulating module 17 calculates a control signal of a pump of the feed inlet 9 according to rheological property and coating speed requirements of the electrode slurry and geometric parameters of the feed inlet 9 and the die cavity 10, and a calculation formula is deduced based on a hydrodynamic theory and a hydrodynamic model and comprises a relation among the fluid pressure, pipeline resistance and coating speed of the electrode slurry.
The temperature regulating module 18 adopts the temperature sensor 14 to acquire temperature data of the electrode slurry, and performs feedback control on the temperature through the feedback control module 19, and regulates the temperature of circulating water in the temperature regulating pipeline 14 so as to realize accurate control on the temperature of the electrode slurry;
The temperature adjustment module 18 calculates a control signal to be provided according to the heat conduction characteristics of the electrode paste, the power of the equipment for heating and cooling the circulating water, and the structural parameters of the temperature adjustment pipeline 14, and the calculation formula is derived based on the heat conduction equation and the heat balance principle so as to ensure that the electrode paste maintains a proper temperature in the coating process.
The feedback control module 19 monitors key parameters in the coating process in real time through a thickness sensor and a light sensor, including the thickness, the surface density and the coating speed of the electrode slurry, sends monitored key parameter data to the main control console 1, and the data are used as feedback of actual conditions and used for evaluating the current coating effect and performance, the main control console 1 compares and analyzes the received feedback data with preset parameters, and the self-adaptive regulation and control system 15 automatically adjusts the angle of the differential screw 6 and the pressure of the feed inlet 9 according to the comparison result so as to realize more optimized coating effect and performance;
The feedback control module 19 monitors the key parameters in real time and compares the key parameters with the expected targets to construct a feedback loop, so that the adaptive control system 15 can be continuously adjusted, and meanwhile, an error value is calculated and used for evaluating the state and performance deviation of the current adaptive control system 15, the key parameters are automatically adjusted by using a PID control algorithm according to the error value, and finally, the parameters in the control algorithm are adjusted and optimized according to actual conditions and requirements so as to obtain the optimal control effect and stability.
Example 1
The utility model provides a but coating die head of automatic adjustment hot slurry mobility suitable for lithium cell production, includes master control board 1, self-adaptation regulation and control system 15, goes up mould 2 and lower mould 3, install gasket 4 between going up mould 2 and the lower mould 3, go up and form lip 5 between mould 2 and the lower mould 3, go up mould 2 and install differential screw 6 in the embedded top of lip 5, go up mould 2 and install T type piece 7, be provided with micrometer 8 on the T type piece 7, 3 front sides of lower mould are provided with feed inlet 9, the inside die cavity 10 that is provided with of lower mould 3.
The staff puts the gasket 4 with proper model between the upper die 2 and the lower die 3, adjusts the vertical height of the T-shaped block 7 by using the micrometer 8, after the equipment is prepared, the electrode slurry enters the die cavity 10 along the feed port 9 of the lower die 3, various parameters including the optimal production temperature preset in the self-adaptive regulation system 15 by the main control console 1 are observed to see whether the parameters of the temperature sensor 13 and the pressure sensor 12 are normal, when the value of the temperature sensor 13 is higher than the optimal production temperature, the self-adaptive regulation system 15 reduces the circulating water temperature of the temperature regulation pipeline 14 by the temperature regulation module 18 so as to take away part of heat of the electrode slurry until the temperature is within the optimal production temperature range, when the value of the temperature sensor 13 is lower than the optimal production temperature, the self-adaptive regulation system 15 regulates the circulating water temperature of the temperature regulation pipeline 14 by the temperature regulation module 18, bringing partial heat to the electrode slurry until the temperature is within the optimal production temperature range, ensuring that the fluidity and coating effect of the electrode slurry reach the optimal value, regulating the opening and closing degree of a pump of a feed inlet 9 in real time through a feedback control module 19 to reduce the feeding speed of the feed inlet 9 if the pressure parameter is higher than the optimal value, similarly improving the feeding speed of the feed inlet 9 if the pressure parameter is lower than the optimal value, stabilizing the pressure of the electrode slurry flowing to a lip 5 by a die cavity 10, observing the surface density of the electrode slurry of the lip 5, regulating the vertical height of a T-shaped block 7 by a rotary micrometer 8 according to the condition of the real-time surface density, changing the slit size of the lip 5, avoiding extrusion deformation of the lip 5 in the regulation mode, avoiding damaging the straightness and flatness of the die head, and well ensuring the consistency of the transverse surface density of the electrode slurry, the die head is always attached to the plane of the gasket 4, and the phenomenon of edge leakage can not occur.
According to the invention, the feeding pressure and the temperature of the electrode slurry in the coating process can be monitored and regulated in real time through the feeding port pressure regulating module 17 and the temperature regulating module 18, so that the fluidity and uniformity of the electrode slurry are ensured, and a better coating effect is realized, and through the main control console 1 and the self-adaptive regulating and controlling system 15, an operator can flexibly regulate the parameters of the regulating module according to production requirements, including the pressure and the temperature of the feeding port 9, and the regulation of the surface density and the coating uniformity of the electrode slurry is conveniently and rapidly realized.
Example two
The utility model provides a but coating die head of automatic adjustment hot slurry mobility suitable for lithium cell production, includes master control board 1, self-adaptation regulation and control system 15, goes up mould 2 and lower mould 3, install gasket 4 between going up mould 2 and the lower mould 3, go up and form lip 5 between mould 2 and the lower mould 3, go up mould 2 and install differential screw 6 in the embedded top of lip 5, go up mould 2 and install T type piece 7, be provided with micrometer 8 on the T type piece 7, 3 front sides of lower mould are provided with feed inlet 9, the inside die cavity 10 that is provided with of lower mould 3.
The operator places a gasket 4 with a proper model between the upper die 2 and the lower die 3, various parameters are preset in the self-adaptive regulation and control system 15 through the main control platform 1, the differential screw regulation module 16 accurately regulates the position of the differential screw 6 by controlling the rotation circle number and the speed of the motor 11 so as to change the local slit size of the lip 5, after the equipment is prepared, electrode slurry enters the die cavity 10 along the feed port 9 of the lower die 3, the main control platform 1 observes whether the parameters of the temperature sensor 13 and the pressure sensor 12 are normal or not, when the value of the temperature sensor 13 is higher than the optimal production temperature, the self-adaptive regulation and control system 15 reduces the circulating water temperature of the temperature regulation pipeline 14 through the temperature regulation module 18 so as to take away part of heat of the electrode slurry until the temperature is within the optimal production temperature range, when the value of the temperature sensor 13 is lower than the optimal production temperature, the temperature of the circulating water of the temperature regulating pipeline 14 is regulated to be higher by the temperature regulating module 18, partial heat is brought to the electrode slurry until the temperature is within the optimal production temperature range, the fluidity and the coating effect of the electrode slurry are ensured to be optimal, if the pressure parameter is higher than the optimal value, the opening and closing degree of the pump of the feed inlet 9 is regulated in real time by the feedback control module 19 to reduce the feed speed of the feed inlet 9, if the pressure parameter is lower than the optimal value, the feed speed of the feed inlet 9 is increased in the same way, the electrode slurry flows to the lip 5 after the pressure of the die cavity 10 is regulated, the feedback control module 19 monitors the surface density of the electrode slurry of the lip 5 in real time, then feeds back the parameter signal to the self-adaptive regulating system 15 according to the condition of the real-time surface density, and then passes through the differential screw regulating module 16, the control motor 11 adjusts the rotation number of the differential screw 6 to realize the position fine adjustment of the differential screw 6, so that the local flow of the lip 5 is changed during the production of the lithium battery, and the lip 5 is extruded and deformed at the moment, so that the surface density of the electrode paste can be accurately adjusted.
The invention can precisely control the rotation number of the differential screw 6 through the differential screw adjusting module 16, further improve the adjusting capability and precision of the electrode slurry surface density, monitor and adjust the feeding pressure and the temperature of the electrode slurry in the coating process in real time through the feed inlet pressure adjusting module 17 and the temperature adjusting module 18, ensure the fluidity and uniformity of the electrode slurry, thereby realizing better coating effect, and adjust various parameters in real time through the feedback control module 19 and feed back to each module for cooperation execution, including the rotation number of the differential screw 6, the pressure and the temperature of the feed inlet 9, thereby conveniently and rapidly realizing the adjustment of the electrode slurry surface density and coating uniformity.
Example III
The utility model provides a but coating die head of automatic adjustment hot slurry mobility suitable for lithium cell production, includes master control board 1, self-adaptation regulation and control system 15, goes up mould 2 and lower mould 3, install gasket 4 between going up mould 2 and the lower mould 3, go up and form lip 5 between mould 2 and the lower mould 3, go up mould 2 and install differential screw 6 in the embedded top of lip 5, go up mould 2 and install T type piece 7, be provided with micrometer 8 on the T type piece 7, 3 front sides of lower mould are provided with feed inlet 9, the inside die cavity 10 that is provided with of lower mould 3.
The staff places the gasket 4 with proper model between the upper die 2 and the lower die 3, presets various parameters in the self-adaptive regulation and control system 15 through the main control table 1, adjusts the vertical height of the T-shaped block 7 by using the micrometer 8, enters the electrode slurry into the die cavity 10 along the feed port 9 of the lower die 3 after the equipment is prepared, observes whether the parameters of the temperature sensor 13 and the pressure sensor 12 are normal through the main control table 1, reduces the circulating water temperature of the temperature regulation pipeline 14 through the temperature regulation module 18 when the numerical value of the temperature sensor 13 is higher than the optimal production temperature, takes away part of heat of the electrode slurry until the temperature is within the optimal production temperature range, increases the circulating water temperature of the temperature regulation pipeline 14 through the temperature regulation module 18 when the numerical value of the temperature sensor 13 is lower than the optimal production temperature, brings part of heat to the electrode slurry, ensuring the fluidity and coating effect of the electrode slurry to be optimal until the temperature is within the optimal production temperature range, regulating the opening and closing degree of a pump of the feed inlet 9 in real time through a feedback control module 19 to reduce the feeding speed of the feed inlet 9 if the pressure parameter is higher than the optimal value, and improving the feeding speed of the feed inlet 9 in the same way if the pressure parameter is lower than the optimal value, wherein the die cavity 10 is used for stabilizing the pressure, the electrode slurry flows to the lip 5 after the pressure stabilization, observing the surface density of the electrode slurry of the lip 5, then regulating the vertical height of the T-shaped block 7 through a rotary micrometer 8 according to the condition of the real-time surface density, changing the slit size of the lip 5, controlling the rotation number of the differential screw 6 through a differential screw regulating module 16 by using the parameters fed back by the feedback control module 19 in real time if the local electrode slurry surface density still does not reach the production requirement, the finer position adjustment of the primary and secondary screws of the differential screw 6 is realized until the surface density reaches the production requirement.
The invention is provided with the self-adaptive regulation and control system 15, and the system can automatically adjust the fluidity and the coating effect of the electrode slurry by monitoring the real-time condition of the electrode slurry so as to ensure the optimal coating quality and uniformity; the double-adjusting structure is adopted, and comprises a differential screw 6 and a T-shaped block 7, so that the local slit size of the lip 5 and the slit size formed by the gasket 4 can be respectively adjusted, and the surface density of electrode slurry can be more flexibly controlled; the main control console 1 and the self-adaptive regulation and control system 15 allow accurate control and adjustment of the coating process, which means that the coating thickness, the surface density and the flow rate can be flexibly adjusted according to different preset requirements and conditions, so that the production requirements of lithium batteries of different types are met; the coating die head is provided with a thickness sensor and a photoelectric sensor for monitoring key parameters including the thickness, the surface density and the movement speed of the electrode slurry in real time, and the data are sent to the self-adaptive regulation and control system 15 through the feedback control module 19 for evaluating the coating effect and performance and carrying out corresponding adjustment and optimization according to the requirement; can adapt to the characteristics and requirements of different electrode slurries, provide more flexible and accurate coating control, and can ensure the coating thickness and uniformity to meet the requirements by automatically adjusting the fluidity, the pressure and the temperature of hot slurry, thereby improving the consistency and the stability of production.
Claims (10)
1. Coating die head that can automatically regulated hot paste mobility suitable for lithium cell production, its characterized in that: the automatic feeding device comprises a main control console (1), a self-adaptive regulation and control system (15), an upper die (2) and a lower die (3), wherein a gasket (4) is arranged between the upper die (2) and the lower die (3), a lip (5) is formed at the joint of the upper die (2) and the lower die (3) at the rear, a differential screw (6) is embedded in the upper part of the lip (5), a T-shaped block (7) is arranged on the upper die (2), a micrometer (8) is arranged on the T-shaped block (7), a feed inlet (9) is arranged at the front side of the lower die (3), and a die cavity (10) is arranged in the lower die (3).
The differential screw (6) is connected with the motor (11), the differential screw (6) comprises a snap screw, and when the size of a slit of the lip (5) is adjusted by the snap screw, the lip (5) is extruded and deformed;
The self-adaptive regulation and control system (15) comprises a differential screw regulation module (16), a feed inlet pressure regulation module (17), a temperature regulation module (18) and a feedback control module (19), wherein the differential screw regulation module (16) regulates the rotation number of the differential screw (6) through a control motor (11) to realize the position regulation of the differential screw (6) so as to automatically regulate the size of the lip (5); the feed inlet pressure adjusting module (17) is used for adjusting the feed pressure of the electrode slurry of the feed inlet (9) in the coating process so as to control the coating uniformity; the temperature regulating module (18) is used for monitoring and controlling the temperature of the electrode slurry in the coating process in real time so as to ensure that the electrode slurry has optimal fluidity and coating effect; the feedback control module (19) monitors key parameters in the coating process in real time and feeds the data back to the main control console (1) so as to adjust and optimize according to actual conditions.
2. The coating die head capable of automatically adjusting hot slurry fluidity suitable for lithium battery production according to claim 1, wherein: the position of the T-shaped block (7) extends downwards from the top of the upper die (2) to the bottom of the upper die (2), and the micrometer (8) is connected with the T-shaped block (7) through a coupler.
3. The coating die head capable of automatically adjusting hot slurry fluidity suitable for lithium battery production according to claim 1, wherein: and when the micrometer (8) controls the T-shaped block (7) to move up and down to adjust the slit size of the lip (5), the lip (5) is not extruded and deformed.
4. The coating die head capable of automatically adjusting hot slurry fluidity suitable for lithium battery production according to claim 1, wherein: the number of the T-shaped blocks (7) is adjusted according to the transverse lengths of the upper die (2) and the lower die (3), and the number of the differential screws (6) is adjusted according to the transverse lengths of the upper die (2) and the lower die (3).
5. The coating die head capable of automatically adjusting hot slurry fluidity suitable for lithium battery production according to claim 1, wherein: the feeding hole (9) is connected with the die cavity (10), and a pressure sensor (12), a temperature sensor (13) and a temperature regulating pipeline (14) are arranged in the feeding hole (9).
6. The coating die head capable of automatically adjusting hot slurry fluidity suitable for lithium battery production according to claim 1, wherein: and a thickness sensor and a photoelectric sensor are also arranged between the upper die (2) and the lower die (3).
7. The coating die head capable of automatically adjusting hot slurry fluidity suitable for lithium battery production according to claim 1, wherein: the differential screw adjusting module (16) accurately adjusts the position of the differential screw (6) by controlling the rotation number and the speed of the motor (11) in the coating process, and changes the position of the differential screw (6) according to a preset value, so that the size of the lip (5) is changed, the fluidity of electrode slurry and the optimization of the coating effect are ensured, and the coating requirements under different battery models and requirements are met;
the differential screw adjusting module (16) calculates the angle of the differential screw (6) which needs to rotate according to the fluidity and coating effect requirements of the electrode slurry, a calculation formula derives based on a rheology theory, coating process parameters and physical parameters of the electrode slurry, a series of reference values including the optimal lip (5) size, the viscosity and the flow velocity of the electrode slurry are set according to the fluidity requirements, and then the rotation angle of the differential screw (6) is calculated according to preset values.
8. The coating die head capable of automatically adjusting hot slurry fluidity suitable for lithium battery production according to claim 1, wherein: the pressure of the feeding port (9) is monitored in real time by the pressure sensor (12) through the feeding port pressure regulating module (17), the opening and closing degree of a pump of the feeding port (9) is regulated in real time according to a preset value and the feedback control module (19) so as to control the feeding pressure of the electrode slurry, and the uniform flow of the electrode slurry in the coating process can be ensured by precisely controlling the pressure of the feeding port (9), so that a stable and consistent coating effect is realized;
The feed inlet pressure regulating module (17) calculates a control signal of a pump of the feed inlet (9) according to rheological property and coating speed requirements of the electrode slurry and geometric parameters of the feed inlet (9) and the die cavity (10), and a calculation formula is deduced based on a hydrodynamic theory and a hydrodynamic model and comprises a relation among the fluid pressure, pipeline resistance and coating speed of the electrode slurry.
9. The coating die head capable of automatically adjusting hot slurry fluidity suitable for lithium battery production according to claim 1, wherein: the temperature regulation module (18) adopts the temperature sensor (13) to acquire temperature data of the electrode slurry, and carries out feedback control on the temperature through the feedback control module (19), and regulates the temperature of circulating water in the temperature regulation pipeline (14) so as to realize accurate control on the temperature of the electrode slurry;
The temperature regulation module (18) calculates a control signal to be provided according to the heat conduction characteristic of the electrode slurry, the power of equipment for heating and cooling circulating water and the structural parameters of the temperature regulation pipeline (14), and the calculation formula is deduced based on a heat conduction equation and a heat balance principle so as to ensure that the electrode slurry keeps a proper temperature in the coating process.
10. The coating die head capable of automatically adjusting hot slurry fluidity suitable for lithium battery production according to claim 1, wherein: the feedback control module (19) monitors key parameters in the coating process in real time through the thickness sensor and the light sensor, including the thickness, the surface density and the coating speed of the electrode slurry, sends monitored key parameter data to the main control platform (1), the data are used as feedback of actual conditions and used for evaluating the current coating effect and performance, the main control platform (1) compares and analyzes the received feedback data with preset parameters, and the self-adaptive regulation and control system (15) automatically regulates the angle of the differential screw (6) and the pressure of the feeding port (9) according to the comparison result so as to realize more optimized coating effect and performance;
The feedback control module (19) is used for constructing a feedback loop through monitoring key parameters in real time and comparing the key parameters with an expected target, so that the self-adaptive regulation and control system (15) can be continuously adjusted, meanwhile, an error value is calculated and used for evaluating the state and performance deviation of the current self-adaptive regulation and control system (15), the key parameters are automatically adjusted by using a PID control algorithm according to the error value, and finally, the parameters in the control algorithm are adjusted and optimized according to actual conditions and requirements so as to obtain the optimal control effect and stability.
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