A heating device

Abstract

This invention discloses a heating device belonging to the field of lithium-ion battery electrode drying technology. The device includes a frame body and a zoned drying system. The frame body has a channel for transporting battery electrodes. The zoned drying system includes an A-radiation drying unit and a B-radiation drying unit respectively located above and below the battery electrode transport path. Each radiation drying unit is equipped with a dryer and a nozzle assembly. The dryer is used for directional radiative heating of the battery electrodes. The airflow from the nozzle assembly is configured to form a non-contact air-float support for the passing battery electrodes. The control system is used to independently adjust the power of the dryer and the airflow parameters of the nozzle assembly. This application utilizes the high efficiency and directness of laser or infrared radiation sources to accurately and quickly transfer heat to the surface of the battery electrodes, ensuring temperature uniformity during the heating process. Compared with traditional heating methods, it avoids the risk of overheating or uneven heating and improves drying efficiency.

Description

Technical Field

[0001] This invention relates to the field of lithium-ion battery electrode drying technology, and more specifically, to a heating device. Background Technology

[0002] In the current coating industry, common drying technologies mainly include hot air drying and contact hot roller drying. Hot air drying technology uses heated air to create convection, transferring heat to the surface of the slurry to achieve moisture evaporation. However, there is a significant temperature gradient during hot air drying, resulting in extremely uneven drying of the slurry. This fails to meet the stringent requirements for drying consistency of high-energy-density battery electrodes, thus affecting the stability and consistency of battery performance. Secondly, hot air drying has low heat transfer efficiency, typically with a heat utilization rate of less than 40%. A large amount of heat energy is lost with the exhaust, resulting in energy waste and increased production costs. In addition, there is a temperature gradient of ±15℃ within the drying chamber, causing a significant difference in drying rate between the edge and center of the slurry, which seriously affects the product qualification rate. For strips with different slurries on the A and B sides, such as a water-based slurry on the positive electrode side and an oil-based slurry on the negative electrode side, the hot air drying process cannot simultaneously adapt to the drying conditions of different slurries, and the drying process parameters conflict and interfere with each other. For example, the positive electrode requires a drying temperature of 120°C, while the negative electrode requires 80°C. The system can only take a compromise value and cannot meet their respective optimal drying requirements. At the same time, hot air circulation can also lead to cross-contamination of volatile substances in the two-sided slurry. For example, water vapor from water-based slurry mixes into the solvent of oil-based slurry, further affecting the drying effect and product quality.

[0003] Contact-type hot roller drying technology has two main drawbacks. First, the coating is easily subjected to pressure during contact with the hot roller, resulting in scratches or uneven thickness, affecting coating quality and subsequent processing performance. Second, this drying method is only suitable for single-sided drying. For double-sided coated strips, two processing steps are required, increasing production steps and time costs, and potentially causing coating damage or deformation during processing, further reducing product yield. Therefore, existing hot air drying and contact-type hot roller drying technologies have significant shortcomings in terms of drying uniformity, thermal efficiency, energy utilization, adaptability, and product quality assurance.

[0004] Therefore, a heating device is needed to solve the above technical problems and meet the coating industry's demand for efficient, energy-saving, uniform and high-quality drying. Summary of the Invention

[0005] The purpose of this invention is to provide a heating device that solves the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A heating device, comprising

[0008] The main frame is equipped with channels for transporting battery electrodes;

[0009] A zoned drying system is provided along the transmission direction of the channel. The zoned drying system includes an A-radiation drying unit and a B-radiation drying unit respectively located above and below the battery electrode transmission path. Each A-radiation drying unit and the B-radiation drying unit includes a dryer and a nozzle assembly spaced apart. The output end of the dryer is aligned with the surface of the battery electrode to be dried for directional radiative heating of the battery electrode. The output end of the nozzle assembly is aligned with the surface of the battery electrode, and its jet airflow is configured to form a non-contact air-float support for the passing battery electrode. The nozzle assembly is connected to an air supply system. Both the air supply system and the dryer are electrically connected to a control system. The control system is used to independently regulate the power of the dryer and the airflow parameters of the nozzle assembly.

[0010] Furthermore, the dryer is an infrared emitter or a laser emitter.

[0011] Furthermore, the B-radiation drying unit located below the battery electrode conveying path is replaced by several idler rollers. Each idler roller is rotatably mounted inside the frame body via a bearing assembly and is arranged at intervals along the conveying direction of the channel. The roller surface of the idler roller contacts the lower surface of the battery electrode and provides mechanical support.

[0012] Furthermore, lifting components are connected to both ends of the idler roller, and the lifting components are fixedly installed inside the frame. The idler roller has an integrated circulating water cooling channel, and the inlet and outlet of the circulating water cooling channel are connected to a cooling system to maintain the roller surface temperature.

[0013] Furthermore, the system also includes a temperature sensor and a position sensor electrically connected to the control system. Several temperature sensors are provided and evenly distributed on the inner wall of the channel to monitor the surface temperature of the battery electrode in real time. The position sensors are located at the input and output ends of the channel to detect the transmission speed and position offset of the battery electrode. The control system dynamically adjusts the power of the dryer and the airflow parameters of the nozzle assembly based on the data fed back by the temperature sensor and the position sensor.

[0014] Furthermore, the nozzle assembly includes at least one of a slit nozzle and an array of perforated nozzles.

[0015] Furthermore, the control system independently regulates the power of the dryer and the airflow parameters of the nozzle assembly, specifically including the following steps:

[0016] S1. Preset heating parameters according to the properties and thickness of the slurry on the battery electrode sheet. The heating parameters include the radiation power P0 of the dryer, the radiation source type, and the airflow speed of the nozzle assembly.

[0017] S2. Start the heating device to dry the upper and lower surfaces of the battery electrode in sections, which are heated by the A radiation drying unit and the B radiation drying unit respectively.

[0018] S3. The temperature and position sensors are used to detect the surface temperature and transmission speed of the coated battery electrode in real time. Based on the data fed back by the temperature and position sensors, the control system dynamically adjusts the radiation power of the dryer and the airflow parameters of the nozzle assembly.

[0019] S4. The control system continuously monitors the surface temperature of the battery electrode and updates the drying parameters in real time. After the battery electrode is dried, the position sensor confirms that the transfer of the battery electrode is complete and it automatically enters the next process.

[0020] Furthermore, the radiation power mentioned in step S1 is determined based on the slurry properties and thickness, satisfying the following relationship:

[0021]

[0022] In the formula, P0 is the initial radiant power in W; k is the thermal conductivity of the slurry in W / (m·K); and A is the heating area of ​​the battery electrode in m². 2 ΔT represents the heating temperature difference of the slurry, in K, ΔT = T' - T0, where T' is the target heating temperature of the slurry and T0 is the initial temperature of the slurry; α is the radiation absorptivity of the slurry, dimensionless; d avg The average thickness of the slurry is expressed in meters (m).

[0023] Furthermore, the process of dynamically adjusting the radiant power of the dryer described in step S3 includes the following steps:

[0024] S31. The current surface temperature T of the battery electrode is collected in real time according to the collection period Δt using a temperature sensor. s And calculate the target heating temperature T' and the measured temperature T of the slurry. s deviation value e n and the change in deviation Δe n It satisfies the following relationship:

[0025] e n =T'-T s ;

[0026] Δe n =e n -e n-1 ;

[0027] Where e n The temperature deviation value at the current time n; Δe n T' represents the temperature deviation change between the current time n and the previous time n-1; T' represents the target heating temperature of the slurry.

[0028] S32. Calculate the power correction using the discrete PID formula, satisfying the following relationship:

[0029] ;

[0030] ;

[0031] ;

[0032] ;

[0033] Among them, P n K is the power adjustment amount at the current moment, calculated through proportional control. p I is the proportionality coefficient; n Let I be the integral term at time n, representing the effect of the cumulative temperature deviation on the power. n-1 K is the integral term of the previous time step n-1. i D is the integral coefficient; n The differential term represents the effect of temperature deviation on power, K. d Δt is the differential coefficient; Δt is the acquisition period; ΔP is the total power adjustment.

[0034] S33. Calculate the adjusted radiated power output value P', which satisfies the following relationship:

[0035] P' = P0(1 + ΔP).

[0036] In summary, compared with the prior art, the beneficial effects of the present invention are:

[0037] The heating device of this invention utilizes the high efficiency and directness of laser or infrared radiation sources to accurately and rapidly transfer heat to the surface of the battery electrode, ensuring temperature uniformity during the heating process. Compared to traditional heating methods, using laser or infrared radiation as a radiation source allows for more precise control of the heating area, avoiding the risks of overheating or uneven heating and improving drying efficiency. Furthermore, the device employs a zoned drying system and independently adjustable radiation heating units, enabling simultaneous heating of both sides of the battery electrode. By flexibly adjusting the upper and lower heating and airflow parameters according to the needs of different drying stages or coating types, the device ensures effective heating of both sides of the battery electrode and avoids warping or uneven stress problems that may occur with single-sided heating. Simultaneously, the nozzle assembly is spaced apart from the dryer, providing airflow at a specific angle and shape, offering stable air support for the battery electrode during transport and ensuring a stable distance between it and the drying unit. The nozzle assembly also promptly removes solvent vapors volatilized from the surface of the battery electrode, preventing solvent saturation from affecting the drying rate and ensuring environmental safety. The design of the nozzle assembly also optimizes the temperature distribution on the surface of the battery electrode, preventing localized overheating, thereby further improving the uniformity and speed of drying.

[0038] The overall structural design is simple and highly integrated, making operation more convenient, reducing quality problems caused by operational errors, and improving production efficiency. Through optimized heating and airflow management, this device significantly improves the controllability of the drying process, effectively avoiding drying defects caused by excessively high or low local temperatures, ultimately improving production quality and process stability. Attached Figure Description

[0039] Figure 1 This is a top view of the heating device of the present invention;

[0040] Figure 2 for Figure 1 The CC cross-sectional plan view, in which the zoned drying system is a three-dimensional cross-sectional view consisting of the A-radiation drying unit and the idler rollers;

[0041] Figure 3 for Figure 1 A three-dimensional cross-sectional view of the CC section, in which the drying system consists of an A-radiation drying unit and idlers;

[0042] Figure 4 for Figure 1 The CC cross-sectional plan view, in which the zoned drying system is a cross-sectional view consisting of radiation drying unit A and radiation drying unit B;

[0043] Among them, 1-frame body, 11-channel, 2-zone drying system, 21-A radiation drying unit, 22-B radiation drying unit, 23-dryer, 24-nozzle assembly, 3-battery electrode sheet, 4-idler roller. Detailed Implementation

[0044] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments given herein are for illustration and explanation only and are not intended to limit the present invention.

[0045] like Figure 4 As shown, a heating device includes

[0046] The frame body 1 is provided with a channel 11 for transmitting battery electrode plates 3;

[0047] The partitioned drying system 2 is arranged along the transmission direction of the channel 11. The partitioned drying system 2 includes an A-radiation drying unit 21 and a B-radiation drying unit 22 respectively arranged above and below the transmission path of the battery electrode 3. Both the A-radiation drying unit 21 and the B-radiation drying unit 22 include a dryer 23 and a nozzle assembly 24 arranged at intervals. The output end of the dryer 23 is aligned with the surface of the battery electrode 3 to be dried, and is used to perform directional radiative heating on the battery electrode 3. The output end of the nozzle assembly 24 is aligned with the surface of the battery electrode 3, and its jet airflow is configured to form a non-contact air-float support for the passing battery electrode 3. The nozzle assembly 24 is connected to an air supply system. The air supply system and the dryer 23 are both electrically connected to the control system. The control system is used to independently adjust the power of the dryer 23 and the airflow parameters of the nozzle assembly 24.

[0048] The main frame 1 is the primary support frame of the heating device, possessing sufficient rigidity and stability. Internally, it features a continuous transmission channel 11 to carry and guide the battery electrode 3 smoothly and continuously through the drying area along a set path. The channel 11 employs an open design for easy maintenance and observation. The zoned drying system 2 covers the entire drying area along the transmission direction of the battery electrode 3. Its core feature is the symmetrically arranged radiation drying units, enabling simultaneous and synchronous heating of both sides of the battery electrode 3. Both upper and lower heating and airflow are independently set, allowing for flexible temperature / airflow gradient curves to match different solvent evaporation characteristics or the drying requirements of different electrode stages. This ensures effective double-sided drying of the electrode and avoids warping caused by single-sided heating. The dryer 23 is the core heating element, preferably a high-efficiency infrared radiator, such as a short-wave or medium-wave IR tube / plate, a microwave generator, or other directional radiant heat source, responsible for emitting heat energy onto the surface of the battery electrode 3, directly heating it through radiation. The nozzle assembly 24 is spaced apart from the dryer 23, providing airflow at a specific angle and shape to provide stable air flotation support for the battery electrode 3 during the transfer process, maintaining a stable distance between the battery electrode 3 and the drying unit; and timely removing solvent vapors volatilized from the surface of the battery electrode 3 to prevent saturation from affecting the drying rate and to maintain environmental safety. In addition, the nozzle assembly 24 can also help adjust the temperature distribution on the surface of the battery electrode 3 to prevent local overheating. This application combines the high efficiency and directness of radiant heating with the advantages of enhanced heat transfer, dehumidification, and temperature control of airflow management, significantly improving the uniformity, speed, and process controllability of drying.

[0049] Working principle: The battery electrode 3 is pulled by the traction roller group and kept stable under appropriate tension. It continuously passes through the frame channel 11 and enters the drying area. The upper and lower surfaces of the battery electrode 3 are simultaneously subjected to radiant heat energy from the A radiation drying unit 21 and the B radiation drying unit 22. At the same time, the air nozzle assembly 24 arranged at intervals sprays controlled airflow onto the surface of the battery electrode 3, performing the triple functions of purging solvent vapor, assisting temperature control and providing support. The control system independently adjusts the heating power, air volume and air speed of the A radiation drying unit 21 and the B radiation drying unit 22 according to the set process formula to ensure that the battery electrode 3 achieves the optimal drying effect and quality throughout the drying process.

[0050] Furthermore, the dryer 23 is an infrared emitter or a laser emitter.

[0051] The device uses an infrared or laser emitter as the dryer 23, which directly acts on the surface of the battery electrode 3 through radiation heating, achieving rapid heating and efficient drying. The selection of infrared and laser emitters ensures efficient heating performance, which can quickly transfer heat to the surface of the battery electrode 3, achieving a precise and uniform drying effect. This avoids the problem of uneven heat distribution in traditional heating methods. Depending on the material and coating properties of the battery electrode 3, different wavelengths of infrared or laser radiation sources can be selected to further improve heating efficiency and reduce energy loss.

[0052] like Figures 1 to 3 As shown, the B radiation drying unit 22 located below the transmission path of the battery electrode 3 is replaced by several idler rollers 4. Each idler roller 4 is rotatably mounted inside the frame body 1 through a bearing assembly and is arranged at intervals along the transmission direction of the channel 11. The roller surface of the idler roller 4 contacts the lower surface of the battery electrode 3 and provides mechanical support.

[0053] By replacing the B-radiation drying unit 22 located below the transmission path of the battery electrode 3 with several idler rollers 4, a single-sided drying solution is achieved. This method is relatively simple to operate and easier to control. Operators only need to focus on the drying parameters of one side, without needing to adjust the drying conditions of both sides simultaneously. This simplifies the operation process, reduces the possibility of operational errors, lowers the quality problems caused by improper operation, and improves operational convenience. Furthermore, the spacing or material selection of the idler rollers 4 can be adjusted to accommodate battery electrode 3 of different thicknesses, ensuring optimal single-sided drying results.

[0054] Furthermore, lifting components are connected to both ends of the idler roller 4. The lifting components are fixedly installed inside the frame. The idler roller 4 integrates a circulating water cooling channel 11. The inlet and outlet of the circulating water cooling channel 11 are connected to a cooling system to maintain the roller surface temperature of the idler roller 4.

[0055] The design of the circulating water cooling channel 11 ensures the uniformity and stability of the surface temperature of the idler roller 4, avoiding damage to the battery electrode 3 or uneven drying due to excessively high or low temperatures, and further improving the drying quality. The circulating water cooling system can be combined with the intelligent temperature control system to adjust the cooling water flow and temperature in real time, keeping the temperature of the idler roller 4 within the optimal range, and ensuring that the drying process is more refined and intelligent.

[0056] Furthermore, it also includes a temperature sensor and a position sensor electrically connected to the control system. The temperature sensors are evenly distributed in the channel 11 to monitor the surface temperature of the battery electrode 3 in real time. The position sensors are set at the input and output ends of the channel 11 to detect the transmission speed and position offset of the battery electrode 3. The control system dynamically adjusts the power of the dryer 23 and the airflow parameters of the nozzle assembly 24 based on the data fed back by the temperature sensor and the position sensor.

[0057] Real-time temperature and position feedback can precisely control the drying process, avoid local overheating or underheating, ensure uniform heating of battery electrode 3, prevent thermal damage, and dynamically adjust airflow and heating power, making the drying process more intelligent and avoiding uneven drying caused by environmental changes.

[0058] Furthermore, the nozzle assembly 24 includes at least one of a slit nozzle and an array of perforated nozzles.

[0059] Slit-type and array-type multi-hole nozzles can provide a more uniform airflow distribution, forming a stable air flotation support for the surface of the battery electrode 3, avoiding local overheating and effectively blowing away solvent vapor, thus improving drying speed and uniformity. Appropriate nozzle structures and airflow patterns can be selected according to different coating requirements to further improve the airflow management effect. For example, for thicker coatings, the air velocity and air volume of the nozzle can be appropriately increased to accelerate solvent evaporation.

[0060] Furthermore, the control system independently regulates the power of the dryer 23 and the airflow parameters of the nozzle assembly 24, specifically including the following steps:

[0061] S1. Preset heating parameters according to the properties and thickness of the slurry on the battery electrode 3. The heating parameters include the radiation power P0 of the dryer 23, the radiation source type, and the airflow speed of the nozzle assembly 24.

[0062] The radiant power of the dryer 23 is calculated based on the heat absorption, thermal conductivity, and target drying temperature of the slurry. The type of radiation source is selected according to the slurry properties, such as thermal stability and heat absorption characteristics, choosing a suitable source, such as an infrared radiation source or a laser radiation source, to ensure maximum energy conversion efficiency during the heating process. The airflow velocity of the nozzle assembly 24 is calculated based on the coating thickness, slurry volatility, and coating surface uniformity requirements. The airflow velocity is adjusted based on feedback from the coating surface temperature to ensure effective air flotation support during the drying process and prevent thermal damage to the coating. By precisely preset heating parameters, the most suitable heating method can be selected for different types of coatings, avoiding coating damage caused by uneven or excessively high temperatures. Consideration of slurry properties and thickness makes the heating process more personalized and flexible, improving overall production efficiency.

[0063] S2. Start the heating device to dry the upper and lower surfaces of the battery electrode 3 in sections, which are heated by radiation drying unit A 21 and radiation drying unit B 22 respectively.

[0064] Through the zoned drying system 2, the upper and lower surfaces of the battery electrode 3 are heated by different radiation drying units to ensure uniform heating on both sides and meet the drying requirements of different parts. Differentiated heating is carried out according to the different requirements of the battery electrode 3, which improves the uniformity of the coating and the quality of the final product. The radiation drying unit and the nozzle assembly 24 work together to achieve fine drying of the coating through the dual effects of directional radiation heating and airflow support.

[0065] S3. The surface temperature and transmission speed of the coated battery electrode 3 are detected in real time using temperature and position sensors. Based on the data fed back by the temperature and position sensors, the control system dynamically adjusts the radiation power of the dryer 23 and the airflow parameters of the nozzle assembly 24.

[0066] The temperature of the battery electrode 3 surface is monitored in real time by a temperature sensor, especially the temperature change during the drying process. This temperature information is transmitted to the control system, which adjusts according to the set target temperature. The position sensor is used to monitor the transmission speed and position offset of the battery electrode 3 in the drying channel 11 to ensure that the battery electrode 3 is accurately positioned during the heating process and to prevent uneven heating due to transmission errors. The control system adjusts the heating parameters based on the real-time feedback data and dynamically adjusts the radiation power of the dryer 23 and the airflow speed of the nozzle assembly 24 to achieve precise control of the coating surface temperature and avoid drying defects caused by excessively high or low temperatures. When the position offset of the edge of the battery electrode 3 is detected, the airflow pressure of the offset side nozzle assembly 24 can be increased to correct the electrode position through buoyancy.

[0067] S4. The control system continuously monitors the surface temperature of the battery electrode 3 and updates the drying parameters in real time. After the battery electrode 3 is dried, the position sensor confirms that the transfer of the battery electrode 3 is complete and it automatically enters the next process.

[0068] The control system continuously monitors the surface temperature of the battery electrode 3 and updates the drying parameters in real time based on sensor feedback. By adjusting the radiation power of the dryer 23 and the airflow speed of the nozzles, it avoids local overheating or uneven cooling. The control strategy is optimized using a machine learning algorithm based on sensor data, making the drying process more intelligent and adaptable to changes in different coatings and environmental conditions. After completing the heating and drying process, it automatically enters the next process. The system has a high degree of automation, which can reduce manual intervention and improve production efficiency. The real-time data of the entire process is fed back to the production management system for monitoring and improving production quality. By optimizing the drying process through big data analysis and continuously accumulating real-time feedback data, the control system can continuously optimize parameter settings to improve the stability and efficiency in long-term production.

[0069] Furthermore, the radiation power in step S1 is determined based on the slurry properties and thickness, satisfying the following relationship:

[0070]

[0071] In the formula, P0 is the initial radiant power in W; k is the thermal conductivity of the slurry in W / (m·K); and A is the heating area of ​​the battery electrode 3 in m². 2 ΔT represents the heating temperature difference of the slurry, in K, ΔT = T' - T0, where T' is the target heating temperature of the slurry and T0 is the initial temperature of the slurry; α is the radiation absorptivity of the slurry, dimensionless; d avg The average thickness of the slurry is expressed in meters (m).

[0072] Furthermore, the process of dynamically adjusting the radiation power of the dryer 23 in step S3 includes the following steps:

[0073] S31. The current surface temperature T of the battery electrode 3 is collected in real time according to the collection period Δt using a temperature sensor. s And calculate the target heating temperature T' and the measured temperature T of the slurry. s deviation value e n and the change in deviation Δe n It satisfies the following relationship:

[0074] e n =T'-T s ;

[0075] Δe n =e n -e n-1 ;

[0076] Where e n The temperature deviation value at the current time n; Δe n T' represents the temperature deviation change between the current time n and the previous time n-1; T' represents the target heating temperature of the slurry.

[0077] S32. Calculate the power correction using the discrete PID formula, satisfying the following relationship:

[0078] ;

[0079] ;

[0080] ;

[0081] ;

[0082] Among them, P n K is the power adjustment amount at the current moment, calculated through proportional control. p I is the proportionality coefficient; nLet I be the integral term at time n, representing the effect of the cumulative temperature deviation on the power. n-1 K is the integral term of the previous time step n-1. i D is the integral coefficient; n The differential term represents the effect of temperature deviation on power, K. d Δt is the differential coefficient; Δt is the acquisition period; ΔP is the total power adjustment.

[0083] S33. Calculate the adjusted radiated power output value P', which satisfies the following relationship:

[0084] P' = P0(1 + ΔP).

[0085] The PID control algorithm dynamically adjusts power based on temperature deviations and changes, making the drying process more precise and avoiding excessively high or low temperature fluctuations. The proportional, integral, and derivative terms work together to ensure real-time response and precise adjustment, stabilizing temperature control. During initial operation, e n-1 =0、I n-1 =0、Δe n =0; proportional term P n Adjust power based on the current temperature deviation; Integral term I n The cumulative adjustment power based on historical temperature deviations is used to eliminate steady-state errors; the differential term D n Power is adjusted based on the rate of change of temperature deviation to predict system behavior and mitigate system response.

[0086] It should be understood that the above embodiments are one or more embodiments of the present invention. There are many other embodiments and variations based on the present invention. Any variations and modifications made by those skilled in the art without making pioneering innovations are within the protection scope of the present invention.

Claims

1. A heating device, characterized in that: include The main frame is equipped with channels for transporting battery electrodes; A zoned drying system is arranged along the transmission direction of the channel. The zoned drying system includes an A-radiation drying unit and a B-radiation drying unit respectively positioned above and below the battery electrode transmission path. Each A-radiation drying unit and each B-radiation drying unit includes a dryer and a nozzle assembly spaced apart. The output end of the dryer is aligned with the surface of the battery electrode to be dried, used for directional radiative heating of the battery electrode. The output end of the nozzle assembly is aligned with the surface of the battery electrode, and its jet airflow is configured to form a non-contact air-float support for the passing battery electrode. The nozzle assembly is connected to an air supply system. Both the air supply system and the dryer are electrically connected to a control system. The control system is used to independently regulate the power of the dryer and the airflow parameters of the nozzle assembly. The regulation process specifically includes the following steps: S1. Preset heating parameters according to the properties and thickness of the slurry on the battery electrode sheet. The heating parameters include the radiation power P0 of the dryer, the radiation source type, and the airflow speed of the nozzle assembly. S2. Start the heating device to dry the upper and lower surfaces of the battery electrode in sections, which are heated by the A radiation drying unit and the B radiation drying unit respectively. S3. Using temperature and position sensors, the surface temperature and transmission speed of the coated battery electrode are detected in real time. Based on the data fed back from the temperature and position sensors, the control system dynamically adjusts the radiant power of the dryer and the airflow parameters of the nozzle assembly. This process includes: S31. The current surface temperature T of the battery electrode is collected in real time according to the collection period Δt using a temperature sensor. s And calculate the target heating temperature T' and the measured temperature T of the slurry. s deviation value e n and the change in deviation Δe n It satisfies the following relationship: e n =T'-T s Δe n =Δe n -Δe n-1 Where e n The temperature deviation value at the current time n; Δe n T' represents the temperature deviation change between the current time n and the previous time n-1; T' represents the target heating temperature of the slurry. S32. Calculate the power correction using the discrete PID formula, satisfying the following relationship: Among them, P n K is the power adjustment amount at the current moment, calculated through proportional control. p I is the proportionality coefficient; n Let I be the integral term at time n, representing the effect of the cumulative temperature deviation on the power. n-1 K is the integral term of the previous time step n-1. i D is the integral coefficient; n The differential term represents the effect of temperature deviation on power, K. d Δt is the differential coefficient; Δt is the acquisition period; ΔP is the total power adjustment. S33. Calculate the adjusted radiated power output value P', which satisfies the following relationship: P' = P0[1 + ΔP]; S4. The control system continuously monitors the surface temperature of the battery electrode and updates the drying parameters in real time. After the battery electrode is dried, the position sensor confirms that the transfer of the battery electrode is complete and it automatically enters the next process.

2. The heating device according to claim 1, characterized in that: The dryer is an infrared emitter or a laser emitter.

3. The heating device according to claim 1, characterized in that: The B-radiation drying unit located below the battery electrode conveying path is replaced by several idler rollers. Each idler roller is rotatably mounted inside the frame body via a bearing assembly and is spaced apart along the conveying direction of the channel. The roller surface of the idler roller contacts the lower surface of the battery electrode and provides mechanical support.

4. The heating device according to claim 3, characterized in that: The idler roller is connected to lifting components at both ends. The lifting components are fixedly installed inside the frame body. The idler roller has an integrated circulating water cooling channel. The inlet and outlet of the circulating water cooling channel are connected to a cooling system to maintain the roller surface temperature.

5. The heating device according to claim 1, characterized in that: It also includes a temperature sensor and a position sensor electrically connected to the control system. Several temperature sensors are provided and evenly distributed on the inner wall of the channel for real-time monitoring of the surface temperature of the battery electrode. The position sensors are located at the input and output ends of the channel for detecting the transmission speed and position offset of the battery electrode. The control system dynamically adjusts the power of the dryer and the airflow parameters of the nozzle assembly based on the data fed back by the temperature sensor and the position sensor.

6. The heating device according to claim 1, characterized in that: The nozzle assembly includes at least one of a slit nozzle and an array of multi-hole nozzles.

7. The heating device according to claim 1, characterized in that: The radiation power mentioned in step S1 is determined based on the slurry properties and thickness, and satisfies the following relationship: In the formula, P0 is the initial radiant power in W; k is the thermal conductivity of the slurry in W / (m·K); and A is the heating area of ​​the battery electrode in m². 2 ΔT represents the heating temperature difference of the slurry, in K, ΔT = T' - T0, where T' is the target heating temperature of the slurry and T0 is the initial temperature of the slurry; α is the radiation absorptivity of the slurry, dimensionless; d avg The average thickness of the slurry is expressed in meters (m).

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