Electro-convective electromagnetic induction vacuum baking device, heating control system and baking method

Abstract

The present application relates to a polar roll electromagnetic induction vacuum baking device, a heating control system and a baking method. The polar roll electromagnetic induction vacuum baking device is composed of a vacuum baking device, a polar roll support arranged at the bottom of the inner cavity of the vacuum baking device, an infrared temperature monitoring sensor arranged at the top of the inner cavity of the vacuum baking device for monitoring the temperature of the battery polar roll in real time, a pair of excitation coil discs symmetrically arranged on the two side walls of the vacuum baking device between the polar roll support and the infrared temperature monitoring sensor, and a battery polar roll arranged between the pair of excitation coil discs. The baking device monitors the temperature of the battery polar roll by using the infrared temperature monitoring sensor to control the vacuum degree of the baking oven and the strength of the alternating electromagnetic field, so that the battery polar roll can more uniformly absorb heat during the baking process, improve the energy utilization rate, reduce energy consumption, and complete the baking process in a shorter time.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electromagnetic induction heating, and particularly relates to an electrode roll electromagnetic induction vacuum baking device, a heating control system and a baking method. BACKGROUND

[0002] Lithium battery manufacturing is one of the most important links in modern industry, and the electrode roll is a core component of the battery. In the manufacturing process of the electrode roll, heating treatment is often required to improve the performance of the electrode material, and the production process directly affects the performance and service life of the battery. At present, the traditional electrode roll heating on the market is in the form of air blowing heating. This method has the problems of low efficiency, high energy consumption and inaccurate temperature control precision, and has certain limitations in production.

[0003] CN201710890615.X discloses a lithium battery vacuum drying oven temperature collection control device, which aims to provide a lithium battery vacuum drying oven temperature collection control device with simple circuit design, long service life, small line occupation space, simple circuit wiring and easy maintenance. The technical scheme: the lithium battery vacuum drying oven temperature collection control device comprises a temperature collection module, a temperature control module and an integrated control system, the temperature collection module is a multi-channel temperature collection, the integrated control system is used in a high-temperature and high-vacuum state; the temperature collection module is connected with the temperature control module, the temperature collection module converts the physical property signal into a digital temperature signal and outputs it to the temperature control module; the integrated control system is connected with the temperature control module, the integrated control system receives and sends instructions and controls the temperature of the temperature control module, and the integrated control system monitors the temperature collected by the temperature collection module in real time. The deficiency is that: the temperature collection control device is mostly used for contact baking, and needs to be in close contact with the object to be measured to measure the accurate temperature, and the temperature collection probe of the whole temperature collection control system is usually more. SUMMARY

[0004] The purpose of the present application is to provide an electrode roll electromagnetic induction vacuum baking device that can heat the battery electrode roll from the inside, quickly and uniformly, to improve the heating efficiency, reduce the energy consumption in the heating process, improve the control precision of the heating temperature, realize the efficient heating of the battery electrode roll, ensure the stability and controllability of the heating process of the battery electrode roll, shorten the production cycle, and bring significant technical breakthroughs to the battery electrode roll manufacturing process. Another purpose of the present application is to provide an electrode roll electromagnetic induction heating control system and a baking method, which comprises a circular heating disc wound by electromagnetic induction excitation wires, and a variable frequency electromagnetic heating controller that provides the excitation wire disc with a continuously changing 10-15 kHz high frequency low voltage large current in both directions, so that the excitation coil generates an alternating magnetic field, and the metal material inside the battery electrode roll generates eddy current to heat the battery electrode roll.

[0005] The technical solution of the present application is the said polar roll electromagnetic induction vacuum baking device, which is characterized in that it is composed of a vacuum baking device, a polar roll support arranged at the bottom of the inner cavity of the vacuum baking device, an infrared temperature monitoring sensor arranged at the top of the inner cavity of the vacuum baking device for monitoring the temperature of the polar roll in real time, a pair of excitation coil discs symmetrically arranged on the two side walls of the vacuum baking device between the polar roll support and the infrared temperature monitoring sensor, and a battery polar roll arranged between the pair of excitation coil discs; the infrared temperature monitoring sensor of the baking device monitors the temperature of the battery polar roll and inputs the battery polar roll temperature signal into a temperature controller TM, the temperature controller TM outputs a 0-10V direct current signal to a variable frequency electromagnetic heating controller according to the change of the polar roll temperature through internal PID adjustment, the variable frequency electromagnetic heating controller changes the output of 10-15KHz alternating current to the excitation coil according to the size of the received 1-10V direct current signal through internal power semiconductor IGBT module, an alternating magnetic field is generated in the coil through high-frequency alternating current, and the vacuum degree of the oven and the strength of the alternating electromagnetic field are controlled by the variable frequency electromagnetic heating controller, so that the battery polar roll absorbs heat more uniformly during the baking process, improves the energy utilization rate, reduces energy consumption, and completes the baking process in a shorter time.

[0006] As a preferred, the control circuit includes a variable frequency electromagnetic heating controller, an excitation coil, a temperature controller TM, a switching power supply, a three-phase live wire U, V, W and a zero line N connected to the U, V, W, N end of the variable frequency electromagnetic heating controller, wherein the live wire W is connected to the phase line L of the switching power supply, wherein the zero line N is connected to the zero line N of the switching power supply, the excitation coil is connected to the high-frequency alternating current output end of the variable frequency electromagnetic heating controller, the DC input end of the variable frequency electromagnetic heating controller is connected to the DC output end of the temperature controller TM, the phase line L and the zero line N of the temperature controller TM are respectively connected to the corresponding end of the switching power supply, the temperature controller TM and the grounding wire PE of the switching power supply are grounded, and the temperature controller TM is electrically connected to the infrared temperature monitoring sensor.

[0007] As a preferred, the signal processing process of the control circuit: the infrared temperature monitoring sensor collects the polar roll temperature signal and feeds it back to the temperature controller TM, the temperature controller TM outputs a 0-10V direct current signal to the variable frequency electromagnetic heating controller according to the change of the polar roll temperature through internal PID adjustment, the variable frequency heating controller changes the output of 10-15KHz alternating current to the excitation coil according to the received 1-10V direct current signal through internal power semiconductor IGBT module, an alternating magnetic field is generated in the coil through high-frequency alternating current, so that the induced eddy current is generated in the copper and aluminum materials in the battery polar roll, the heating of the excitation coil disc is realized, and then the battery polar roll is baked.

[0008] Another technical solution of the application is the said pole winding electromagnetic induction heating control system, which is characterized in that it comprises a variable frequency electromagnetic heating controller, an excitation coil, a temperature controller TM, a switching power supply, three-phase live wires U, V and W and a zero line N connected to the U, V, W and N ends of the variable frequency electromagnetic heating controller, wherein the live wire W is connected to the phase line L of the switching power supply, the zero line N is connected to the zero line N of the switching power supply, the excitation coil is connected to the high-frequency alternating current output end of the variable frequency electromagnetic heating controller, the DC input end of the variable frequency electromagnetic heating controller is connected to the DC output end of the temperature controller TM, the phase line L and the zero line N of the temperature controller TM are connected to the corresponding ends of the switching power supply respectively, the temperature controller TM and the grounding line PE of the switching power supply are grounded, and the temperature controller TM is electrically connected to an infrared temperature monitoring sensor.

[0009] Still another technical solution of the application is the said control method of the pole winding electromagnetic induction vacuum baking device, which is characterized by the following steps:

[0010] (1) installing the excitation coil disc on the left and right sides inside the vacuum baking oven cavity, and horizontally placing the battery pole winding in the vacuum baking oven cavity and clamping it between the left and right excitation coil discs;

[0011] (2) calculating the required parameters of the excitation coil according to the formula L=N^2·μ·A / l, wherein L is the inductance, N is the number of turns of the coil, μ is the magnetic permeability of the coil material, A is the cross-sectional area of the coil, and l is the length of the coil;

[0012] (3) starting heating, the vacuum baking oven starts vacuumizing, and the excitation coil is supplied with high-frequency alternating current through the electromagnetic controller, so that the metal materials of aluminum and copper inside the battery pole winding generate eddy current under the magnetic field of the excitation coil to heat, the temperature of the battery pole winding is collected by the infrared temperature monitoring sensor, the high-frequency alternating current output of the electromagnetic controller is adjusted and controlled by the temperature control module to realize the regulation and control of the electromagnetic field strength, so that the battery pole winding is uniformly heated;

[0013] (4) during the baking process, the metal materials inside the battery pole winding generate eddy current in the alternating magnetic field to uniformly heat and bake the battery pole winding.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] (1) The baking device of the present invention has high heating efficiency and can bring the battery electrode roll to the set temperature value in a short time.

[0016] (2) The temperature uniformity of the baking device of the present invention is improved: through vacuum baking and electromagnetic induction technology, the metal material inside the battery electrode roll can be heated evenly to achieve a more uniform temperature distribution, ensuring that the entire battery electrode roll is heated more evenly during the baking process and improving the consistency of electrode material performance.

[0017] (3) The baking device of the present invention reduces energy consumption: vacuum baking and electromagnetic induction technology can transfer heat energy more effectively, reduce energy waste, reduce energy consumption, and meet the requirements of energy conservation and emission reduction.

[0018] (4) The baking device of the present invention improves the production efficiency: electromagnetic induction heating technology can complete the baking process in a shorter time, improve production efficiency, and make the battery electrode roll production line more competitive. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the electromagnetic induction heating vacuum baking device of the present invention;

[0020] Figure 2 This is a front view of the structure of the electromagnetic induction heating vacuum baking device of the present invention;

[0021] Figure 3 This is a front view of the excitation wire disk of the electromagnetic induction heating of the pole roll of the present invention;

[0022] Figure 4 This is a side view of the excitation wire disk of the electromagnetic induction heating of the pole roll of the present invention;

[0023] Figure 5 This is a control circuit diagram of the excitation coil for electromagnetic induction heating of the pole roll of the present invention;

[0024] Figure 6 This is a circuit diagram of the temperature and control system for the electromagnetic induction heating of the electrode roll of the present invention.

[0025] Explanation of key component symbols:

[0026] Vacuum baking apparatus 10 Internal cavity 20 PEEK non-metallic support 30 Field winding 40 Battery pole winding 50 Pole winding support 60 Vacuum sensor 70 Infrared temperature monitoring sensor 80 Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings:

[0028] Please refer to the drawings, the polar roll electromagnetic induction vacuum baking device, vacuum baking equipment, vacuum baking equipment bottom cavity is provided with the polar roll support, vacuum baking equipment cavity top is provided with infrared temperature monitoring sensor, between the polar roll support and the infrared temperature monitoring sensor between the two sides of the vacuum baking equipment symmetrically equipped with excitation coil disc, set between a pair of excitation coil disc battery polar roll is composed of; The temperature of battery polar roll is monitored by using infrared temperature monitoring sensor to control the vacuum degree and the strength of alternating electromagnetic field of oven, so that the battery polar roll absorbs heat more evenly in the baking process, improves the energy utilization rate, reduces the energy consumption, and completes the baking process in a shorter time. The infrared temperature monitoring sensor monitors the temperature of the battery polar roll in real time.

[0029] Please refer to the drawings, the control method of the polar roll electromagnetic induction vacuum baking device, comprising the following steps:

[0030] (1) install the excitation coil disc on the left and right sides inside the vacuum baking oven cavity, and put the battery polar roll horizontally into the vacuum baking oven cavity and clamp it between the excitation coil discs on the left and right sides;

[0031] (2) calculate the required parameters of the excitation coil according to the formula L=N^2·μ·A / l, where L is the inductance, N is the number of turns of the coil, μ is the magnetic permeability of the coil material, A is the cross-sectional area of the coil, and l is the length of the coil;

[0032] (3) start heating, the vacuum baking oven starts to vacuumize, and the electromagnetic controller gives the excitation coil a high-frequency alternating current, so that the metal materials aluminum and copper inside the battery polar roll generate eddy current in the magnetic field of the excitation coil to heat, the temperature of the battery polar roll is collected by the infrared temperature monitoring sensor, and the high-frequency alternating current output of the electromagnetic controller is adjusted and controlled by the temperature control module to realize the regulation and control of the electromagnetic field strength, so that the battery polar roll is uniformly heated;

[0033] (4) During the baking process, the metal materials inside the battery polar roll generate eddy current in the alternating magnetic field to uniformly heat and bake the battery polar roll.

[0034] Working principle: the baking and heating method of the battery polar roll is designed to use electromagnetic induction principle, generate alternating magnetic field in the coil through high-frequency alternating current, and generate induction eddy current in the copper and aluminum materials in the battery polar roll to realize the heating effect. The excitation coil disc is designed as the heating component of the polar roll baking.

[0035] Please refer to Figure 6The polar roll electromagnetic induction heating control system is shown, including variable frequency electromagnetic heating controller, excitation coil, temperature controller TM, switching power supply, three-phase fire line U, V, W and zero line N access the U, V, W, N end of the variable frequency electromagnetic heating controller, wherein the fire line W access switching power supply phase line L, wherein the zero line N access switching power supply zero line N, excitation coil access variable frequency electromagnetic heating controller high frequency AC output end, variable frequency electromagnetic heating controller DC input end access temperature controller TM DC output end, temperature controller TM phase line L, zero line N respectively access switching power supply corresponding end, temperature controller TM and switching power supply ground wire PE ground, temperature controller TM electric connection infrared temperature monitoring sensor;The polar roll electromagnetic induction heating control system uses infrared temperature monitoring sensor to collect polar roll temperature feedback to temperature controller TM, temperature controller TM changes according to the polar roll temperature through internal PID regulation output 0-10V DC signal to variable frequency electromagnetic heating controller, variable frequency heating controller according to the 1-10V DC signal size received, through internal power semiconductor IGBT module changes output 10-15KHz AC current to excitation coil, through high-frequency alternating current in the coil produces alternating magnetic field, thereby in the battery polar roll copper and aluminum material produces induction eddy current, realize excitation coil disc heating, and then bake battery polar roll.

[0036] The above only for the preferred embodiment of the present application, any equivalent changes and modifications made in the scope of the present application claims, should be included in the scope of the present application claims.

Claims

1. A battery electrode heating control system, applicable to a battery electrode electromagnetic induction vacuum baking device, wherein the battery electrode electromagnetic induction vacuum baking device comprises a vacuum baking device, an electrode support mounted at the bottom of the inner cavity of the vacuum baking device, an infrared temperature monitoring sensor mounted at the top of the inner cavity of the vacuum baking device for real-time monitoring of the battery electrode temperature, excitation coil disks symmetrically mounted on both side walls of the vacuum baking device between the electrode support and the infrared temperature monitoring sensor, a battery electrode disposed between a pair of excitation coil disks, and a control circuit; the infrared temperature monitoring sensor of the control circuit monitors the battery electrode temperature and transmits the battery electrode temperature information. The temperature controller TM inputs a 0-10V DC signal to the frequency converter electromagnetic heating controller via internal PID regulation based on changes in the electrode roll temperature. The frequency converter electromagnetic heating controller, based on the received 1-10V DC signal, uses its internal power semiconductor IGBT module to adjust the output 10-15kHz AC current to the excitation coil. This high-frequency alternating current generates an alternating magnetic field in the coil. The frequency converter electromagnetic heating controller controls the vacuum level of the oven and the strength of the alternating electromagnetic field, ensuring more uniform heat absorption during the baking process, thus completing the baking process. Its key feature is... The control system includes a variable frequency electromagnetic heating controller, an excitation coil, a temperature controller TM, and a switching power supply. The three-phase live wires U, V, W and neutral wire N are connected to the U, V, W, and N terminals of the variable frequency electromagnetic heating controller. The live wire W is connected to the phase wire L of the switching power supply, and the neutral wire N is connected to the neutral wire N of the switching power supply. The excitation coil is connected to the high-frequency AC output terminal of the variable frequency electromagnetic heating controller. The DC input terminal of the variable frequency electromagnetic heating controller is connected to the DC output terminal of the temperature controller TM. The phase wire L and neutral wire N of the temperature controller TM are respectively connected to the corresponding terminals of the switching power supply. The grounding wire PE of the temperature controller TM and the switching power supply are grounded. The temperature controller TM is electrically connected to an infrared temperature monitoring sensor.

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