A coating apparatus

Abstract

The utility model discloses a kind of coating equipment. Coating equipment includes: slide rail and multiple coating modules, each coating module is moved along slide rail, each coating module includes die head and screw pump, and screw pump is connected with die head;Among them, multiple coating modules are respectively used to coat multiple substrates, and coating module and substrate one-to-one correspond, each coating module is used to coat respective corresponding substrate, to obtain pole piece;Screw pump is used to provide slurry for die head, and die head is used to move along slide rail, and is used to coat substrate with slurry when moving. The coating equipment provided in the utility model embodiment can improve the flexibility of coating equipment.

Description

Technical Field

[0001] This utility model relates to coating technology, and more particularly to a coating device. Background Technology

[0002] Coating equipment coats substrates to produce battery electrodes, and is an indispensable piece of equipment in the coating process of battery electrodes and in battery manufacturing. Currently, existing coating equipment typically uses a monolithic structure, which suffers from poor flexibility. Utility Model Content

[0003] This utility model provides a coating device to improve the flexibility of coating equipment.

[0004] This utility model provides a coating device, including: a slide rail and multiple coating modules, each of the coating modules moving along the slide rail, each of the coating modules including a die head and a screw pump, the screw pump being connected to the die head;

[0005] The plurality of coating modules are used to coat multiple substrates, and each coating module corresponds to a substrate. Each coating module is used to coat its corresponding substrate. The screw pump is used to provide slurry to the die head, which is used to move along the slide rail and to coat the substrate with the slurry during the movement.

[0006] Optionally, the slide rail includes a transverse slide rail and a longitudinal slide rail, and the die head moves along the transverse slide rail and / or the longitudinal slide rail.

[0007] Optionally, when the coating width of the substrate is less than a preset coating width threshold, the corresponding die head moves along the longitudinal slide rail to make the coating width reach the preset coating width threshold.

[0008] Optionally, when the blank width of the substrate is greater than a preset blank width threshold, the corresponding mold head moves along the transverse slide rail so that the blank width reaches the preset blank width threshold.

[0009] Optionally, the coating module further includes a motor connected to the die head, which drives the die head to move along the slide rail during operation.

[0010] Optionally, the coating equipment also includes a controller, which is electrically connected to the motor and screw pump of each of the coating modules; the controller is used to control the operating status of the motor of each coating module and the operating status of the screw pump of each coating module.

[0011] Optionally, the controller is specifically used to control the speed of the motor when controlling the motor to work, and to control the pump speed of the screw pump when controlling the screw pump to work.

[0012] Optionally, if the coating of at least two of the substrates is unqualified, the corresponding coating modules shall work simultaneously or sequentially to adjust the coating.

[0013] Optionally, the number of the die head and the screw pump in each of the coating modules is 1.

[0014] Optionally, the substrate is a battery substrate.

[0015] The coating equipment provided in this embodiment includes: a slide rail and multiple coating modules, each moving along the slide rail. Each coating module includes a die head and a screw pump, with the screw pump connected to the die head. The multiple coating modules are used to coat multiple substrates, with each module corresponding to a substrate. Each module coats its corresponding substrate to obtain an electrode sheet. The screw pump provides slurry to the die head, which moves along the slide rail and coats the substrate with slurry during movement. The coating equipment provided in this embodiment employs a distributed structure of multiple coating modules. Each module coats its corresponding substrate. The modules can operate simultaneously or separately; that is, each module can adjust its coating size simultaneously or individually, offering flexible adjustment and improving the flexibility of the coating equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a coating device provided in an embodiment of this utility model;

[0017] Figure 2 This is a structural block diagram of a coating equipment component provided in an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the coating width and blanking width provided in an embodiment of this utility model. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0020] Figure 1 This is a schematic diagram of the structure of a coating device provided in an embodiment of this utility model. Figure 2This is a structural block diagram of a coating device according to an embodiment of the present invention. (Reference) Figure 1 and Figure 2 The coating equipment includes a slide rail 10 and multiple coating modules 20. Each coating module 20 moves along the slide rail 10 and includes a die head 21 and a screw pump 22 connected to the die head 21. The multiple coating modules 20 are used to coat multiple substrates, and each coating module 20 corresponds to a substrate. Each coating module 20 is used to coat its corresponding substrate to obtain an electrode sheet. The screw pump 22 is used to provide slurry to the die head, which moves along the slide rail 10 and coats the substrate with slurry during movement.

[0021] For example, there are four coating modules 20, which coat four substrates respectively. The dies 21 in each coating module 20 are arranged sequentially along the slide rail 10. Specifically, when the coating module 20 is working, the die 21 of the coating module 20 moves along the slide rail 10, and the screw pump 22 of the coating module 20 delivers slurry to the die 21 of the coating module 20. The die 21 of the coating module 20 coats the substrate corresponding to the coating module 20 with slurry, thereby achieving coating of the substrate corresponding to the coating module 20 and obtaining the desired electrode sheet. The coating modules 20 in the coating equipment can work simultaneously or not simultaneously. That is, each coating module 20 can adjust its coating size simultaneously or individually, which is flexible and solves the problem.

[0022] The coating equipment provided in this embodiment includes: a slide rail and multiple coating modules, each of which moves along the slide rail. Each coating module includes a die head and a screw pump, with the screw pump connected to the die head. The multiple coating modules are used to coat multiple substrates, with each coating module corresponding to a specific substrate. Each coating module coats its corresponding substrate to obtain an electrode sheet. The screw pump provides slurry to the die head, which moves along the slide rail and coats the substrate with slurry during movement. The coating equipment provided in this embodiment adopts a distributed structure of multiple coating modules. Each coating module coats its corresponding substrate. The coating modules can work simultaneously or separately; that is, each coating module can adjust its coating size simultaneously or individually, providing flexible adjustment and thus improving the flexibility of the coating equipment.

[0023] Optionally, the slide rail 10 includes a transverse slide rail and a longitudinal slide rail, and the mold head 21 moves along the transverse slide rail and / or the longitudinal slide rail.

[0024] Specifically, when the coating module 20 is working, the die head 21 of the coating module 20 can move along the transverse slide rail or the longitudinal slide rail, or both. The purpose of moving the die head 21 of the coating module 20 along the slide rail 10 is to precisely control the coating position and range to meet different coating requirements and ensure the uniformity and consistency of coating quality. The movement of the die head 21 of the coating module 20 along the slide rail can adjust the coating position: In applications such as lithium battery electrode coating, according to the positional deviation of the substrate, the die head 21 of the coating module 20 can move along the longitudinal slide rail to adjust the position of the die head to coat the slurry; it can adapt to substrates of different sizes: When coating substrates of different widths or lengths, the die head 21 can coat at different positions on the substrate surface by moving along the transverse or longitudinal slide rail, expanding the applicability of the coating equipment; and it can improve coating uniformity: During the movement of the die head 21 along the slide rail 10, it can coordinate with the movement of the substrate to make the slurry more evenly coated on the substrate and reduce the deviation of the coating thickness. The driving method of the die head 21 of the coating module 20 can be any one of the following: lead screw drive, cylinder drive, and motor drive. Lead screw drive: The lead screw and slide rail are used in combination. The servo motor drives the ball screw to move the die head along the slide rail 10, which can achieve high-precision positioning. Cylinder drive: The extension and retraction of the cylinder pushes the die head 21 to move on the slide rail 10. It has the characteristics of fast response speed and is often used in coating scenarios with high speed requirements and relatively low precision requirements. Motor drive: Such as stepper motor drive or servo motor drive, the rotation of the motor is converted into linear motion of the die head 21 through the transmission mechanism such as belt, gear, etc., which can precisely control the moving speed and position of the die head 21.

[0025] Furthermore, the slide rail 10 can be a high-precision linear slide rail, which has good straightness and parallelism, and can reduce deviations during the movement of the die head. For example, an air-floating slide rail can achieve nanometer-level precision translation, isolate external vibrations, and ensure the accuracy of the die head movement. Sensor monitoring: Laser displacement sensors and other sensors are used to monitor the position of the die head or its distance from the substrate in real time, so that the position of the die head can be adjusted in a timely manner based on the data monitored by the sensors, ensuring coating accuracy.

[0026] Optionally, when the coating width of the substrate is less than the preset coating width threshold, the corresponding die head 21 moves along the longitudinal slide rail so that the coating width reaches the preset coating width threshold.

[0027] For example, Figure 3 This is a schematic diagram illustrating the coating width and blanking width according to an embodiment of this utility model. (Reference) Figure 3 The wet film width L1, i.e. the coating width, extends in the horizontal direction. When the coating width is less than the preset coating width threshold, the corresponding die head 21 moves along the longitudinal slide rail to increase the coating width so that the coating width reaches the preset coating width threshold.

[0028] Optionally, when the blank width of the substrate is greater than the preset blank width threshold, the corresponding mold head 21 moves along the transverse slide rail so that the blank width reaches the preset blank width threshold.

[0029] Specifically, such as Figure 3 As shown, the extension direction of the blank width L2 is horizontal. When the blank width is greater than the preset blank width threshold, the corresponding mold head 21 moves along the horizontal slide rail to reduce the blank width so that the blank width is reduced to the preset blank width threshold.

[0030] refer to Figure 2 Optionally, the coating module 20 also includes a motor 23, which is connected to the die head 21 and is used to drive the die head 21 to move along the slide rail 10 during operation.

[0031] Specifically, when the motor 23 of the coating module 20 rotates, it drives the die head 21 of the coating module 20 to move along the slide rail 10 to coat the substrate corresponding to the coating module 20. The motor 23 can be a stepper motor or a servo motor. A stepper motor is a motor that converts electrical pulse signals into angular or linear displacement. For each input pulse, the motor rotates by a fixed angle (step angle), and its motion is discrete. Stepper motors are simple to control, achieving open-loop control without position feedback. The rotation angle is directly controlled by the number of pulses, and the speed is controlled by the pulse frequency. Stepper motors have a relatively simple structure, requiring no complex feedback components such as encoders, resulting in lower costs. Stepper motors are less prone to vibration or creeping at low speeds, and their output torque is relatively stable, making them suitable for scenarios requiring smooth low-speed rotation. The positioning accuracy of stepper motors is predictable, and with a fixed step angle, the positioning accuracy is determined by the step angle without missing steps. A servo motor is a closed-loop controlled motor. It uses feedback components such as encoders to detect the motor's position and speed in real time and compares them with the command signal. The controller dynamically adjusts the output to ensure that the actual motion matches the command. Servo motors rely on encoders and closed-loop control, enabling real-time error correction and high positioning accuracy, making them suitable for scenarios requiring high positioning precision. Servo motors offer rapid start-up, acceleration, and deceleration with stable torque output, allowing for quick transitions from standstill to high speeds, ideal for applications requiring frequent starts / stops or rapid speed adjustments. They also boast strong load-bearing capacity; under closed-loop control, the controller automatically adjusts the current to maintain output torque in case of load fluctuations, minimizing stall and adapting to varying load conditions. Servo motors operate smoothly with low noise, utilizing sinusoidal wave drive (AC servo), resulting in smooth rotation, making them suitable for equipment requiring high operational stability, such as precision coating equipment. Furthermore, servo motors have a wide speed range, operating stably from extremely low speeds to rated speeds with high speed accuracy, making them suitable for control scenarios requiring a wide speed range. In coating equipment, if high precision is required for the lateral / longitudinal movement of the die head (e.g., ±0.01mm positioning in lithium battery electrode coating), servo motors can be used, depending on the specific coating requirements, and are not limited here.

[0032] Furthermore, the die head 21 of the coating module 20 can control the output of coating material or slurry to control the coating thickness of the substrate. The die head 21 of the coating module 20 can form coating patterns of various shapes and widths by adjusting the structure and parameters of the die head according to different coating requirements, such as strip coating, grid coating, and full-area coating. The slurry enters the cavity inside the die head, and under pressure, the slurry is evenly distributed within the cavity. It is then extruded through the die head slit or nozzle, forming a stable liquid flow and spreading on the substrate surface to form a coating. During the extrusion process, the coating thickness, width, and uniformity are controlled by adjusting parameters such as the die head slit gap, pressure, and flow rate, as well as coordinating with the movement speed of the substrate. The dies include slit dies, nozzle dies, and scraper dies. For slit dies, the coating is extruded through the slit to form a thin and uniform coating, which is commonly used for coating battery electrodes, such as lithium battery electrodes, and can achieve high-precision, large-area coating. For nozzle dies, the coating is sprayed onto the substrate through the nozzle, which can achieve localized precise coating or coating of complex patterns, and is suitable for applications with extremely high coating precision requirements. For scraper dies, the coating is uniformly scraped onto the substrate using a scraper, which is suitable for coating high-viscosity coatings and can obtain thicker coatings. The specific type of die in this embodiment can be determined according to the actual coating requirements and is not limited here.

[0033] In addition, the width of the die slit determines the extrusion rate of the coating and the initial thickness of the coating, significantly affecting the uniformity of the coating thickness. Precise adjustments are required based on the coating material and process requirements. The pressure applied to the coating affects the extrusion speed and flow rate, thus influencing the coating thickness and uniformity. Appropriate coating pressure ensures good spread and adhesion of the coating on the substrate. The distance between the die and the substrate affects the spray or flow trajectory of the coating, influencing the uniformity and edge quality of the coating. Adjustments are needed based on the coating process and substrate characteristics. During the coating process, coating or slurry residue may remain inside the die, causing blockages or affecting coating quality. Therefore, the die needs to be cleaned regularly with appropriate solvents or cleaning agents to ensure unobstructed internal channels. The die lip, gaskets, and other components of the die may wear down over time, affecting coating accuracy. Regular inspection of the wear on internal components is necessary, and severely worn parts should be replaced promptly. When not in use, the die should be properly stored to avoid damage from impacts, corrosion, etc. It can be stored in a dry, clean environment with appropriate protective measures.

[0034] refer to Figure 2 Optionally, the coating equipment also includes a controller 30, which is electrically connected to the motor 23 and screw pump 22 of each coating module 20; the controller 30 is used to control the working status of the motor 23 of each coating module 20 and the working status of the screw pump 22 of each coating module 20.

[0035] Specifically, when the coating module 20 needs to operate, the controller 30 controls the motor 23 of the coating module 20 to operate. The rotation of the motor 23 drives the die head 21 of the coating module 20 to move along the slide rail 10, and controls the screw pump 22 of the coating module 20 to operate, delivering slurry to the die head 21 of the coating module 20. Through the control of the motor 23 and screw pump 22 of the coating module 20 by the controller 30, the coating module 20 can coat its corresponding substrate.

[0036] Optionally, the controller 30 is specifically used to control the speed of the motor 23 when the motor 23 is working, and to control the pumping speed of the screw pump 22 when the screw pump 22 is working.

[0037] Specifically, the controller 30 controls the rotation speed of the motor 23 of the coating module 20 to adjust the moving speed of the die 21 of the coating module 20 along the slide rail 10, so that the moving speed of the die 21 of the coating module 20 along the slide rail 10 meets the actual requirements. Furthermore, the controller 30 controls the pumping speed of the screw pump 22 of the coating module 20 to adjust the amount of slurry delivered to the die 21 of the coating module 20, preventing too much or too little slurry in the die 21 of the coating module 20. For example, when there is too much slurry in the die head 21 of the coating module 20, the controller 30 controls the pump speed of the screw pump 22 of the coating module 20 to decrease the amount of slurry delivered to the die head 21 of the coating module 20; when there is too little slurry in the die head 21 of the coating module 20, the controller 30 controls the pump speed of the screw pump 22 of the coating module 20 to increase the amount of slurry delivered to the die head 21 of the coating module 20.

[0038] Furthermore, the controller is also used for parameter setting: setting parameters such as wet film width (coating width), blank width, screw pump speed, and motor speed according to parameter requirements; communication control: transmitting signals according to the set parameters, accurately providing data, and ensuring parameter accuracy; linkage control: determining whether to perform module linkage based on the detected data. If multiple coating modules need to be adjusted simultaneously (adjusting coating density and coating width), then equipment linkage adjustment is performed; otherwise, single module adjustment is performed, ultimately adjusting the coating density and coating width to the qualified range to produce qualified products. It can also perform online measurement of the surface density and dimensions of the formed products, providing real-time feedback and adjustment to achieve closed-loop management. When the coating equipment is working, the controller sets parameters such as the screw pump speed, motor speed, and coating width, and the equipment starts. The controller controls the equipment to perform operating actions and makes adjustments based on data detection feedback. If the coating width and / or areal density of a single substrate is unqualified, the parameters of the corresponding single substrate are adjusted individually. For example, if the coating width is lower than the standard, the blank width is higher than the standard, and the areal density is lower than the standard, the controller controls the motor to drive the die head to move along the longitudinal slide rail to adjust the coating width, and along the transverse slide rail to adjust the blank width, and adjusts the corresponding screw pump speed. If there are at least two unqualified substrates (coating width and / or areal density are unqualified), at least two coating modules can be controlled and adjusted sequentially or simultaneously. The adjustment method is flexible and appropriate.

[0039] Furthermore, the screw pump 22 forms a sealed chamber through the meshing between the screw and the stator. When the screw rotates, the sealed chamber can move axially, thereby conveying the material from the suction end to the discharge end. In coating equipment, this principle is used to stably deliver the slurry to the die head 21 for coating operations. Moreover, the screw pump 22 has high metering accuracy: it can precisely control the material delivery rate, with a metering accuracy of up to ±0.5%, ensuring a uniform supply of slurry during coating and contributing to improved coating thickness consistency and product quality. The screw pump 22 exhibits almost no pulsation during fluid delivery, meaning a stable flow rate without impact or vibration, providing a stable material flow for the coating process and avoiding coating defects caused by flow fluctuations. The screw pump 22 can handle high-viscosity slurries, such as the high-viscosity slurries containing a large number of solid particles used in lithium battery electrode coating, ensuring that the material does not experience blockage or stagnation during delivery. The screw pump 22 exerts relatively low shear force on the conveyed material, preventing damage to the polymer structure or the integrity of solid particles in the slurry, thus maintaining stable material performance. The screw pump 22 can be manufactured using wear-resistant and corrosion-resistant materials, is compatible with slurries containing solid particles and various acidic and alkaline slurries, and can operate stably for extended periods in harsh working environments, extending equipment lifespan. The screw pump 22 has a simple structural design with few parts, featuring clamp interfaces and a detachable rotating unit, facilitating disassembly, cleaning, and maintenance, reducing downtime and maintenance costs. In the coating process of lithium-ion battery electrodes, the screw pump is used to accurately and stably deliver the positive and negative electrode slurries to the die head, ensuring the uniformity and thickness consistency of the substrate coating, playing a crucial role in battery performance and quality. The flow rate and pressure range of a screw pump can be determined based on the production speed and process requirements of the coating equipment to ensure that the slurry conveying needs are met. The material and structure of the screw pump can be selected based on the viscosity, density, corrosiveness, and abrasiveness of the slurry. For example, when conveying slurries containing solid particles, a wear-resistant screw pump should be selected; for corrosive materials, corrosion-resistant stainless steel or special alloy materials should be used. Screw pumps can be driven in various ways, such as electric or pneumatic, and the selection should be based on the actual power supply and coating requirements. High-precision coating equipment may require a servo motor-driven screw pump for more precise flow control. If the coating process has extremely high precision requirements, such as lithium battery electrode coating, a screw pump with high metering accuracy and low pulsation should be selected to ensure the stability of the coating quality.

[0040] Optionally, if the coating of at least two substrates is unqualified, the corresponding coating modules can work simultaneously or sequentially to adjust the coating.

[0041] For example, when the coating of two substrates is unqualified, such as at least one of thickness, width and uniformity, the corresponding coating modules work simultaneously; or, the coating module corresponding to one substrate works first, and the coating module corresponding to the other substrate works later to adjust the coating, with flexible adjustment methods.

[0042] It should be noted that whether the coating modules work simultaneously or sequentially depends on the actual coating requirements and is not limited here.

[0043] Optionally, the number of die heads 21 and screw pumps 22 in each coating module 20 is 1.

[0044] Specifically, each coating module 20 includes a screw pump 22 and a die head 21. The screw pump 22 in the coating module 20 delivers slurry to the die head 21 of the coating module 20. The die head 21 coats the substrate corresponding to the coating module 20 with slurry. The screw pump 22, the die head 21 and the substrate correspond one-to-one, which is convenient for control and management.

[0045] Optionally, the electrode is the electrode of the battery.

[0046] Specifically, battery electrodes, as a key component of batteries, exist in various types of batteries and are crucial in converting chemical energy into electrical energy. Battery electrodes include positive and negative electrodes, which are isolated and connected together by an electrolyte, forming the electrochemical reaction region of the battery. The positive electrode corresponds to the oxidation reaction, and the negative electrode corresponds to the reduction reaction; the positive and negative electrodes are isolated and connected together by the electrolyte. For example, battery electrodes are used in lithium batteries, such as those for liquid lithium batteries, solid-state batteries, lithium iron phosphate batteries, and ternary lithium batteries. The materials for the positive and negative electrodes vary in different types of batteries. Taking lithium-ion batteries as an example, commonly used positive electrode materials include lithium manganese oxide, lithium cobalt oxide, and ternary materials such as nickel manganese cobalt oxide. These materials have high capacity and a high voltage platform, providing longer operating time and higher energy density. A commonly used negative electrode material is graphite, which has good cycle stability and conductivity. Lithium batteries are batteries that use lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. They have advantages such as high energy density, long cycle life, and low self-discharge rate, and have been widely used in consumer electronics, electric vehicles, energy storage systems, drones, medical devices, aerospace equipment and other fields.

[0047] It should be noted that the specific values ​​of each parameter in this embodiment can be determined according to the actual coating requirements, and are not limited here.

[0048] The coating equipment provided in this embodiment includes: a slide rail and multiple coating modules, each coating module moving along the slide rail, and each coating module including a die head and a screw pump, the screw pump being connected to the die head; wherein, the multiple coating modules are used to coat multiple substrates respectively, with each coating module corresponding to a substrate, and each coating module is used to coat its corresponding substrate to obtain an electrode sheet; the screw pump is used to provide slurry to the die head, the die head is used to move along the slide rail, and is used to coat the substrate with slurry during movement; the slide rail includes a transverse slide rail and a longitudinal slide rail, and the die head moves along the transverse slide rail and / or the longitudinal slide rail. The coating equipment provided in this embodiment adopts a distributed structure of multiple coating modules. Each coating module coats its corresponding substrate. These modules can operate simultaneously or separately; that is, each module can adjust its coating size simultaneously or individually, offering flexible adjustment methods and improving the flexibility of the coating equipment. Each coating module can be controlled individually, or multiple modules can be controlled in conjunction, making adjustment more convenient and practical. The number of coating modules can be increased or decreased, allowing for flexible configuration according to production needs, and the coating size can be adjusted as needed. The die head of each coating module can be flexibly adjusted laterally and longitudinally along the slide rail according to the actual coating size requirements, solving the problem of poor overall structural flexibility. Furthermore, each coating module... The module includes one die head and one screw pump. Each coating module is equipped with one screw pump, which solves the problem of poor areal density and dimensional accuracy caused by uneven material supply. The miniaturization of individual coating modules in the distributed structure, with a single die head and a single screw pump forming a single coating module, results in higher adjustment precision and more accurate control over the size and areal density of a single substrate. This solves the problem of large differences in size and areal density between multiple substrates in an integrated structure coating, improving the precision of the coating process and better addressing the challenges of integrated wide-width coating. The coating module can be expanded according to production needs, adding new coating modules to better control costs. The distributed structure facilitates maintenance; if a single coating module malfunctions, only that module needs repair, without the need for complete replacement, resulting in low maintenance costs and fast repair speed.

[0049] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A coating device, characterized in that, include: The system includes a slide rail and multiple coating modules, each of which moves along the slide rail. Each coating module includes a die head and a screw pump, with the screw pump connected to the die head. The plurality of coating modules are used to coat multiple substrates, and each coating module corresponds to a substrate. Each coating module is used to coat its corresponding substrate to obtain an electrode sheet. The screw pump is used to provide slurry to the die head, which is used to move along the slide rail and to coat the substrate with the slurry during the movement.

2. The coating equipment according to claim 1, characterized in that, The slide rail includes a transverse slide rail and a longitudinal slide rail, and the mold head moves along the transverse slide rail and / or the longitudinal slide rail.

3. The coating equipment according to claim 2, characterized in that, When the coating width of the substrate is less than a preset coating width threshold, the corresponding die head moves along the longitudinal slide rail to make the coating width reach the preset coating width threshold.

4. The coating equipment according to claim 2, characterized in that, When the blank width of the substrate is greater than the preset blank width threshold, the corresponding mold head moves along the transverse slide rail so that the blank width reaches the preset blank width threshold.

5. The coating equipment according to claim 1, characterized in that, The coating module also includes a motor connected to the die head, which drives the die head to move along the slide rail during operation.

6. The coating equipment according to claim 5, characterized in that, It also includes a controller, which is electrically connected to the motor and screw pump of each of the coating modules; the controller is used to control the operating status of the motor of each coating module and the operating status of the screw pump of each coating module.

7. The coating equipment according to claim 6, characterized in that, The controller is specifically used to control the speed of the motor when controlling the motor to work, and to control the pump speed of the screw pump when controlling the screw pump to work.

8. The coating equipment according to any one of claims 1-7, characterized in that, When the coating of at least two of the substrates is unqualified, the corresponding coating modules work simultaneously or sequentially to adjust the coating.

9. The coating equipment according to any one of claims 1-7, characterized in that, The number of the die head and the screw pump in each of the coating modules is 1.

10. The coating equipment according to any one of claims 1-7, characterized in that, The electrode is the electrode of the battery.

Images