A heating device

Abstract

The utility model provides a kind of heating device, and heating device includes shell, heating box and vacuum component;Heating box includes box, tray and microwave emission unit;The tray and the microwave emission unit are all arranged in the box, and the tray is detachably connected with the box, and the microwave emission unit is fixedly connected with the box;The vacuum component includes vacuum pump and vacuum gauge, and the vacuum pump and the vacuum gauge are respectively fixedly connected with the box, and the vacuum pump and the vacuum gauge are electrically connected.The microwave emission unit can significantly shorten the preheating time by using the rapid and uniform heating characteristics of microwave heating, and the vacuum pump and the vacuum gauge can dynamically adjust the air extraction state according to the actual vacuum degree, realizing the parallel operation of heating and vacuum process.At the same time, microwave heating can provide heat energy supplement for water vaporization of battery under vacuum environment in time, reduce heat loss, further improve baking efficiency, and more efficiently remove water vapor in battery.

Description

Technical Field

[0001] This utility model belongs to the technical field of battery production equipment, and specifically relates to a heating device. Background Technology

[0002] Before the lithium-ion battery is filled with electrolyte and baked, the moisture inside the cell needs to be removed. In the current mainstream cell baking technology, if a hot air circulation scheme is used, hot air heating cannot be carried out in parallel with the vacuum process. It is necessary to first spend 2 hours heating the cell to the baking process temperature of 105°C before the vacuum baking process can be carried out, which has obvious limitations in the process. On the other hand, if a contact electric heating scheme is used, the heating power of the heating film in contact with the cell is relatively large. In a vacuum environment, there is a serious safety risk. Therefore, it is also necessary to preheat the cell to the process temperature for 1 hour before starting the vacuum baking.

[0003] In addition, both heating methods suffer from the problem of insufficient heat replenishment in a vacuum environment: when the moisture inside the battery electrode vaporizes and absorbs heat, the original heating method is unable to quickly replenish the heat. Utility Model Content

[0004] This utility model provides a heating device to solve the problem of low efficiency in battery cell baking.

[0005] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0006] This application provides a heating device, which includes a housing, a heating chamber, and a vacuum assembly;

[0007] The heating box includes a box body, a tray, and a microwave emitting unit;

[0008] Both the tray and the microwave transmitting unit are disposed inside the box. The tray is detachably connected to the box, and the microwave transmitting unit is fixedly connected to the box.

[0009] The vacuum assembly includes a vacuum pump and a vacuum gauge, which are fixedly connected to the housing and electrically connected.

[0010] Optionally, the heating chamber also includes a controller;

[0011] The microwave transmitting unit, vacuum pump, and vacuum gauge are electrically connected to the controller.

[0012] Optionally, the microwave transmitting unit includes a waveguide and a microwave transmitter;

[0013] The waveguide and the microwave transmitter are respectively fixedly connected to the heating box, and the microwave transmitter is electrically connected to the controller.

[0014] Optionally, the heating device further includes a thermostat;

[0015] The thermostat is fixedly connected to the box body, and the thermostat is electrically connected to the controller.

[0016] Optionally, the heating device further includes a temperature sensor;

[0017] The temperature sensor is fixedly connected to the box body, and the temperature sensor is electrically connected to the controller.

[0018] Optionally, the vacuum assembly further includes: an air extraction pipeline and a vacuum valve;

[0019] One end of the air extraction pipeline is connected to the vacuum pump, the other end of the air extraction pipeline is connected to the box body, and the vacuum valve is arranged on the air extraction pipeline.

[0020] Optionally, the heating box further includes a door panel;

[0021] The door panel is movably connected to the box body.

[0022] Optionally, the heating box further includes a sealing strip;

[0023] The sealing strip is fixedly connected to the door panel.

[0024] Optionally, the heating device includes a plurality of the heating boxes and a main controller;

[0025] The main controller is electrically connected to the controllers of each of the heating boxes respectively.

[0026] Optionally, the heating device further includes an operation panel;

[0027] The operation panel is fixedly connected to the outer shell, and the operation panel is electrically connected to the main controller.

[0028] In the embodiment of the present application, the microwave emission unit is fixed in the heating box, and can utilize the characteristics of microwave heating to quickly and uniformly heat the battery cells in the heating box. Compared with traditional hot air or contact heating, the preheating time can be significantly shortened, and the safety risk of arc generation at the power contacts in the vacuum environment due to contact heating can be avoided. The vacuum pump and the vacuum gauge are both fixed on the heating box, and the structural connection is stable, ensuring the stable establishment and maintenance of the vacuum environment; the electrical connection between the vacuum pump and the vacuum gauge can form a linkage control. The vacuum gauge monitors the vacuum degree in the heating box in real time and transmits the signal to the vacuum pump, so that the vacuum pump can dynamically adjust the air extraction state according to the actual vacuum degree, accurately control the vacuum environment, and realize the parallel progress of the heating and vacuum processes. At the same time, microwave heating can timely provide heat energy supplement for the vaporization of the moisture in the battery cells in the vacuum environment, reduce heat loss, further improve the baking efficiency, and more efficiently remove the water vapor in the battery cells. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a heating device provided in an embodiment of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10. Outer shell; 120. Heating chamber; 201. Chamber body; 202. Tray; 203. Microwave transmitting unit; 2031. Waveguide; 2032. Microwave transmitter; 204. Controller; 205. Door panel; 30. Vacuum assembly; 301. Vacuum pump; 302. Vacuum gauge; 303. Evacuation pipe; 304. Vacuum valve; 40. Temperature controller; 50. Temperature sensor; 60. Operation panel. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0033] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, the first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0034] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings, through specific examples and application scenarios.

[0035] This application provides a heating device, see reference. Figure 1 The heating device includes a housing 10, a heating chamber 20, and a vacuum assembly 30. The heating chamber 20 includes a chamber body 201, a tray 202, and a microwave emitting unit 203. The tray 202 and the microwave emitting unit 203 are both disposed inside the chamber body 201. The tray 202 is detachably connected to the chamber body 201, and the microwave emitting unit 203 is fixedly connected to the chamber body 201. The vacuum assembly 30 includes a vacuum pump 301 and a vacuum gauge 302. The vacuum pump 301 and the vacuum gauge 302 are fixedly connected to the chamber body 201, and the vacuum pump 301 and the vacuum gauge 302 are electrically connected.

[0036] The outer casing 10 provides support and protection for the heating chamber 20 and the vacuum assembly 30, providing effective protection for the heating process.

[0037] The housing 201, serving as the main body of the heating chamber, is constructed of metal, providing sealing and corrosion resistance. Its inner wall is typically coated with a microwave-reflective coating, which confines the electromagnetic waves generated by the microwave emitting unit 203 within the housing 201, reducing energy leakage and improving heating efficiency.

[0038] The pallet 202 is detachably connected to the box 201, which can support the placement of containers of different sizes and shapes. It can be quickly disassembled for cleaning or replacement, avoiding material residue from affecting subsequent processing.

[0039] The microwave transmitting unit 203 induces high-frequency oscillations in electrons through the action of orthogonal electromagnetic fields, thereby radiating microwave energy of 2.45 GHz. The fixed connection between the microwave transmitting unit 203 and the housing 201 ensures a stable transmitting position, and in conjunction with the reflective structure of the housing 201, a uniform electromagnetic field distribution can be formed within the cavity.

[0040] Vacuum pump 301 extracts gas from chamber 201, reducing the gas pressure inside chamber 201 to a vacuum environment. Vacuum gauge 302, such as a thermocouple vacuum gauge 302 or an ionization vacuum gauge 302, monitors the vacuum level inside chamber 201 in real time and feeds the signal back to vacuum pump 301 via electrical connection to achieve automatic control. For example, when vacuum gauge 302 detects that the gas pressure exceeds a set threshold, vacuum pump 301 automatically starts to maintain vacuum stability.

[0041] In practical use, the battery cells to be baked are placed in tray 202. The tray 202, filled with battery cells, is then placed into the heating chamber 20 manually or by a robotic arm. The microwave emitting unit 203 is activated, and simultaneously, the vacuum pump 301 and vacuum gauge 302 begin operation. The vacuum pump 301 evacuates the gas inside the heating chamber 20 to a vacuum environment, and the microwave emitting unit 203 raises the temperature inside the heating chamber 20 to the preset temperature. The battery cells are baked in the heating chamber 20 for 4-6 hours. Microwaves penetrate the surface of the battery cells, directly acting on the water molecules within the electrodes, exciting their high-frequency vibrations and converting them into heat energy. Furthermore, microwaves propagate unimpeded in a vacuum environment, quickly replenishing the heat absorbed during the baking process due to water evaporation. In a vacuum environment, the boiling point of water decreases, accelerating the vaporization of liquid water, which is then rapidly discharged by the vacuum pump 301. After baking, a sample is taken for water content testing. If the test results are satisfactory, the tray 202 is removed by a robot or manually for cooling before proceeding with subsequent production processes.

[0042] The heating device uses microwave heating in a vacuum environment. On the one hand, the vacuum environment lowers the boiling point of moisture or other solvents in the material, allowing the battery cell to be heated and dried at a lower temperature, effectively avoiding the damage to the battery cell that may be caused by traditional high-temperature heating. On the other hand, the penetrating power of microwave heating allows the material to be heated inside and out at the same time, and the solvent evaporates quickly in the vacuum environment, greatly improving heating efficiency and processing effect.

[0043] Optionally, refer to Figure 1 The heating chamber 20 also includes a controller 204; the microwave transmitting unit 203, the vacuum pump 301 and the vacuum gauge 302 are electrically connected to the controller 204 respectively.

[0044] Adding a controller 204 to the heating chamber 20, and electrically connecting the controller 204 to the microwave transmitting unit 203, vacuum pump 301, and vacuum gauge 302, can significantly improve the automation level, control accuracy, and operational stability of the device.

[0045] The controller 204 receives real-time vacuum level data from the vacuum gauge 302 within the heating chamber 20 (box 201). Based on this data, it sends a signal to the vacuum pump 301 to adjust its operation. For example, when the vacuum level is below the set value, the controller 204 drives the vacuum pump 301 to operate continuously; once the target vacuum level is reached, it controls the vacuum pump 301 to stop or maintain low-power operation, achieving precise and stable control of the vacuum environment. Simultaneously, the controller 204 can send a signal to the microwave transmitting unit 203 based on changes in vacuum level. The microwave transmitting unit 203 adjusts parameters such as operating power and operating time based on the received signal. For instance, it reduces microwave power when the vacuum level is low to prevent overheating of the material, and gradually increases power after the vacuum level stabilizes to accelerate the heating process.

[0046] This control mode not only reduces manual intervention and human error, but also automates the heating and drying process. For example, multiple heating programs can be preset via controller 204, setting different vacuum thresholds and corresponding microwave parameters for each stage. Therefore, adding controller 204 to the heating chamber 20 improves its automation level, control accuracy, and operational stability.

[0047] Optionally, refer to Figure 1 The microwave transmitting unit 203 includes a waveguide 2031 and a microwave transmitter 2032; the waveguide 2031 and the microwave transmitter 2032 are respectively fixedly connected to the heating box 20, and the microwave transmitter 2032 is electrically connected to the controller 204.

[0048] In the microwave transmitting unit 203, the microwave transmitter 2032 can be a 2.45GHz magnetron, fixedly installed on the top outer side of the heating box 20. The output end of the microwave transmitter 2032 is sealed to the waveguide 2031 through a flange structure. The waveguide 2031 can be a rectangular metal conduit, with one end connected to the microwave transmitter 2032 and the other end extending through the side wall of the heating box 20 into the interior of the box 201. The end is provided with a horn-shaped radiation port, which faces the center area of ​​the tray 202. The controller 204 controls the output power of the microwave transmitter 2032 through a pulse width modulation signal. After the microwave energy is directionally transmitted through the waveguide 2031, it is uniformly radiated into the box through the radiation port. At the same time, the middle section of the waveguide 2031 is provided with an adjustable short-circuit piston. The microwave reflection path can be changed by rotating the piston position. In conjunction with the metal reflective layer on the inner wall of the box 201, a multi-mode superimposed microwave field is formed inside the box.

[0049] Waveguide 2031 serves as a dedicated microwave transmission channel, reducing energy loss during microwave transmission and ensuring efficient energy transfer from microwave transmitter 2032 to the enclosure. The metallic structure of waveguide 2031 also shields stray electromagnetic waves, preventing microwave leakage from interfering with other components, such as the electronic components of controller 204, thus ensuring the overall electromagnetic compatibility of the device.

[0050] The microwave transmitter 2032 is directly electrically connected to the controller 204. By receiving the signal transmitted from the controller 204, the output power can be changed, and precise power control can be achieved. Combined with the directional radiation characteristics of the waveguide 2031, the focusing area of ​​microwave energy can be adjusted according to the different placement positions of the battery cells to be baked.

[0051] In addition, waveguide 2031 isolates microwave transmitter 2032 from the vacuum and high-temperature environment inside enclosure 201, preventing the transmitter from directly contacting water vapor or corrosive gases and reducing the aging rate of magnetron; at the same time, the sealing structure of waveguide 2031 can prevent the vacuum level inside the enclosure from decreasing due to the transmitter installation gap, reducing the load on vacuum pump 301 and extending its maintenance cycle.

[0052] Optionally, refer to Figure 1 The heating device also includes a thermostat 40; the thermostat 40 is fixedly connected to the housing 201 and electrically connected to the controller 204.

[0053] The temperature controller 40 of the heating device provided in this application embodiment can be a contact temperature sensor 50, whose probe end is fixedly connected to the inner wall of the chamber 201, and can collect the temperature data inside the chamber in real time and transmit it to the controller 204. After receiving the temperature signal transmitted by the temperature controller 40, the controller 204 sends a signal to the microwave transmitting unit 203 according to the temperature inside the heating chamber 20. When the temperature controller 40 detects that the temperature inside the chamber has reached the preset upper limit, it immediately sends a power reduction command to the microwave transmitting unit 203; when the temperature is lower than the preset lower limit, the controller 204 drives the microwave transmitting unit 203 to increase the power until the temperature returns to the set range.

[0054] When the temperature controller 40 detects an abnormal temperature, the controller 204 can cut off microwave emission or increase the vacuum level, forming a dual protection mechanism of active cooling and emergency shutdown. This effectively avoids risks such as damage to the housing 201 and burning of the baked-out battery cells caused by temperature runaway, and extends the service life of the device.

[0055] Optionally, refer to Figure 1 The heating device also includes a temperature sensor 50; the temperature sensor 50 is fixedly connected to the housing 201 and electrically connected to the controller 204.

[0056] A temperature sensor 50 is added to the heating device. The probe end of the temperature sensor 50 is fixedly connected to the inner wall of the housing 201 via a threaded structure, and the probe end head corresponds to the area where the battery cell is placed, approximately 5 cm above the tray 202, ensuring that the probe end can directly collect the ambient temperature around the battery cell. The sensor is electrically connected to the controller 204. During the battery cell drying process, the temperature sensor 50 feeds back the temperature inside the housing to the controller 204 in real time. The controller 204 drives the microwave transmitting unit 203 to gradually increase the power. Initially, the temperature inside the heating housing 20 rises from room temperature to the preset temperature. During the intermediate heating process, the temperature is maintained within a certain range. In the final stage, based on the signal from the controller 204, the power is gradually reduced, causing the temperature inside the heating housing 20 to gradually decrease. At the same time, if the sensor detects an abnormal temperature, such as a sudden increase or decrease of 10°C within 10 seconds, the controller 204 immediately cuts off the microwave transmission and starts the vacuum pump 301 to strengthen the vacuum, suppressing thermal runaway through a low-temperature vacuum environment.

[0057] The temperature data monitored in real time by the temperature sensor 50 provides accurate information to the controller 204, ensuring that the drying process remains within the optimal range. This achieves efficient moisture evaporation through microwave heating while avoiding damage to the cell structure from high temperatures, significantly improving the stability of the cell in subsequent charge-discharge cycles. Compared to open-loop control that relies solely on microwave power to estimate temperature, the closed-loop system formed by the temperature sensor 50 and the controller 204 can dynamically adjust the power output. For example, when the cell stacking density is high, resulting in slower local heating, the low-temperature signal from the sensor will trigger the controller 204 to increase the microwave power, shortening the overall drying time while preventing local over-drying due to excessive power.

[0058] Optionally, refer to Figure 1 The vacuum assembly 30 also includes: an air extraction pipe 303 and a vacuum valve 304; one end of the air extraction pipe 303 is connected to the vacuum pump 301, and the other end of the air extraction pipe 303 is connected to the housing 201, and the vacuum valve 304 is installed on the air extraction pipe 303.

[0059] The two ends of the extraction pipe 303 are connected to the outlet of the vacuum pump 301 and the vacuum interface of the housing 201 through double compression fittings. A rubber sealing ring is installed on the inside of the fitting to prevent air leakage and thus reduce the vacuum level. A slope is reserved in the middle section of the pipe, such as a 1° inclination angle, to prevent condensation residue.

[0060] Vacuum valve 304 is fixed to the middle section of the air extraction pipe 303 by a flange structure and bolt structure, and is electrically connected to controller 204; at the same time, vacuum valve 304 is also equipped with a manual emergency knob, which can manually adjust the valve opening to maintain vacuum when the electrical control system fails.

[0061] In the cell drying process, the controller 204 controls the vacuum valve 304 and the vacuum pump 301 in conjunction with the vacuum level feedback from the vacuum gauge 302. Specifically, during the pre-vacuuming stage, the controller 204 drives the vacuum valve 304 to fully open, and the vacuum pump 301 operates at full load to pump the vacuum level inside the chamber 201 from atmospheric pressure to a preset pressure range. During the constant temperature drying stage, when the vacuum gauge 302 detects that the vacuum level has dropped to the preset pressure range, the controller 204 controls the vacuum valve 304 to partially close, and the vacuum pump 301 switches to low-power operation. During the pressure relief and cooling stage, after drying is completed, the controller 204 controls the vacuum valve 304 to open slowly to fill the chamber 201 with dry gas, such as dry nitrogen.

[0062] The sealing structure of the vacuum pipe 303 and the precise adjustment of the vacuum valve 304 minimize fluctuations in the vacuum level of the enclosure, preventing excessive moisture residue in the battery cells due to unstable vacuum. Simultaneously, it prevents deformation of the battery cell diaphragm caused by excessively high vacuum, ensuring the battery cell's subsequent electrolyte injection and charge / discharge performance. The manual emergency knob of the vacuum valve 304 allows for manual adjustment of the valve to maintain vacuum in case of electrical control failure, preventing moisture absorption of the battery cells due to loss of vacuum in the enclosure 201.

[0063] Optionally, refer to Figure 1 The heating box 20 also includes a door panel 205; the door panel 205 is movably connected to the box body 201.

[0064] In the battery cell drying scenario, stacked battery cell trays 202 need to be frequently picked up and put down. The door panel 205 and the cabinet 201 are designed to be movable, which makes it more convenient for staff to operate.

[0065] Furthermore, during the drying process, chamber 201 must maintain a high vacuum and low microwave leakage; for example, the vacuum should be in the range of -0.092 MPa to -0.095 MPa, and the microwave leakage ≤1 mW / cm². 2 The door panel 205 of the heating box 20 can adopt a double-layer structure design. Understandably, in one embodiment, it can be designed as follows: the outer layer is a 3mm thick cold-rolled steel plate to ensure mechanical strength, the inner layer is a 1.5mm thick brass plate to enhance the microwave shielding effect, and 50mm thick ceramic fiber heat insulation cotton is filled between the two layers of plates. This can control the outer surface temperature of the door panel 205 to below 45℃ and prevent burns to the operator.

[0066] The door panel 205 is connected to the housing 201 via a movable connection, facilitating operation. In actual operation, the operator first opens the door panel 205, places the tray 202 containing the battery cells into the housing 201, closes the door panel 205, and the equipment starts the drying program. During the drying process, the door panel 205 and housing 201 are tightly fitted together, ensuring that the housing 201 maintains the preset vacuum level while preventing microwave leakage. After drying, the controller 204 controls the vacuum valve 304 to release pressure to atmospheric pressure, allowing the operator to open the door panel 205 and quickly remove the tray 202 to complete the battery cell transfer.

[0067] Optionally, the heating box 20 also includes a sealing strip; the sealing strip is fixedly connected to the door panel 205.

[0068] In the heating device provided by the embodiment of the present application, the sealing strip of the heating box 20 can be made of materials with a large temperature resistance range and good aging resistance, such as fluororubber, silicone rubber, perfluoroether rubber, ethylene propylene diene monomer rubber, etc. It is fixedly connected to the groove on the inner side edge of the door panel 205 through a molding process. When the door panel 205 is closed, under the pressing force of the door panel 205, the sealing strip will undergo compressive deformation and closely fit the sealing plane of the box body 201.配合门板205的金属屏蔽层,既能阻断气体泄漏,又能增强微波屏蔽效果。配合门板205的金属屏蔽层,既能阻断气体泄漏,又能增强微波屏蔽效果。

[0069] The temperature resistance of the sealing strip can ensure long-term stable operation in a high-temperature drying environment and a vacuum environment, avoid the decrease in vacuum due to seal failure, and ensure the water evaporation efficiency of the battery cell; further improve the operation safety of the equipment and the guarantee of the drying effect of the battery cell.

[0070] Optionally, the heating device includes a plurality of heating boxes 20 and a main controller; the main controller is electrically connected to the controllers 204 of each heating box 20 respectively.

[0071] In the large-scale production scenario of battery cell drying, the heating device can include a plurality of independent heating boxes 20. Each heating box 20 is equipped with a complete microwave emission unit 203, a vacuum component 30, a temperature controller 40 and an independent controller 204, and can independently complete the battery cell drying process; at the same time, the heating device is also equipped with 1 main controller, which is respectively electrically connected to the controllers 204 of the plurality of heating boxes 20 to实现数据交互与集中控制。实现数据交互与集中控制。

[0072] The main controller supports the operator to preset or call standard process parameters, and can send them to all heating boxes 20 at one key to ensure the process consistency of each box body 201. In addition, the main controller supports the single-box independent control mode. The operator can independently adjust the parameters of a certain heating box 20 through the main controller, such as fine-tuning the drying time for different batches of battery cells;联动运行逻辑,如其中一个加热箱20完成烘干后自动触发另一个加热箱20开始工作,实现流水线式作业。联动运行逻辑,如其中一个加热箱20完成烘干后自动触发另一个加热箱20开始工作,实现流水线式作业。

[0073] This design significantly improves production efficiency. Multiple heating chambers 20 operating in parallel can increase the drying capacity of a single batch of battery cells several times over. The main controller manages the operation of each heating chamber 20, reducing equipment downtime and increasing overall capacity. It also ensures process consistency by uniformly distributing parameters through the main controller, avoiding errors caused by manual settings in each chamber and improving the consistency of moisture content in battery cells dried in different heating chambers 20, thus significantly enhancing product quality stability. Furthermore, it simplifies operation and management. Operators can monitor and adjust all heating chambers 20 directly through the main controller, eliminating the need to travel between multiple devices and reducing equipment operation and maintenance costs. When the number of battery cells to be heated is small, requiring only some heating chambers 20 to operate, the main controller can control only those heating chambers, reducing energy consumption and improving economic efficiency.

[0074] Optionally, refer to Figure 1 The heating device also includes an operation panel 60; the operation panel 60 is fixedly connected to the housing 10 and electrically connected to the main controller.

[0075] In a heating device comprising multiple heating chambers 20, the control panel 60 is embedded and fixedly connected to the housing 10. A mounting hole is pre-drilled in the center of the front of the housing 10, and the control panel 60 is securely connected to the edge of the mounting hole using bolts around its perimeter. The control panel 60 can be a capacitive touchscreen. In practical applications, operators can intuitively view the real-time operating status of each heating chamber 20 via the touchscreen, including parameters such as temperature, vacuum level, operating stage, and remaining time. Different colors can be used to distinguish between normal and abnormal states. Clicking on the corresponding area will access the single-chamber control interface, allowing adjustment of parameters such as microwave power and drying time. Operators can quickly adjust operating status and other information by clicking on the control panel 60.

[0076] An operation panel 60 is added to the outer casing 10 to visualize the parameters of the heating process, avoiding monitoring omissions caused by the dispersion of equipment. Color warnings and pop-up prompts for abnormal states improve the accuracy of fault identification. It also improves the convenience of operation. Clicking on the corresponding area will take you to the single-box control interface to adjust parameters such as microwave power and drying time, further improving the efficiency of operation.

[0077] As shown in Table 1 below, based on the aforementioned one or more embodiments, this application also provides Embodiment 1 and Embodiment 2, which provide baking data for several baking processes as shown in the table below, as well as Comparative Example 1 as a control.

[0078] Table 1 Baking data from several baking processes

[0079] Time required to heat the battery cell to 105℃ 45min 45min 2h Power required for baking a single battery cell 1.35wh 1.6wh 3.25wh Total baking time 4h 6h 10h

[0080] In actual production, after multiple tests and baking practices, the heating device provided in this application is used to bake the battery cells before liquid injection. The baking time and the power consumed per unit battery cell during baking are reduced, which significantly improves work efficiency and economic benefits.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A heating device, characterized in that, The heating device includes a housing (10), a heating chamber (20), and a vacuum assembly (30); The heating box (20) includes a box body (201), a tray (202), and a microwave emitting unit (203); The tray (202) and the microwave transmitting unit (203) are both disposed inside the housing (201). The tray (202) is detachably connected to the housing (201), and the microwave transmitting unit (203) is fixedly connected to the housing (201). The vacuum assembly (30) includes a vacuum pump (301) and a vacuum gauge (302), which are fixedly connected to the housing (201) and electrically connected.

2. The heating device according to claim 1, characterized in that, The heating box (20) also includes a controller (204); The microwave transmitting unit (203), vacuum pump (301) and vacuum gauge (302) are electrically connected to the controller (204).

3. The heating device according to claim 2, characterized in that, The microwave transmitting unit (203) includes a waveguide (2031) and a microwave transmitter (2032); The waveguide (2031) and the microwave transmitter (2032) are fixedly connected to the heating box (20), and the microwave transmitter (2032) is electrically connected to the controller (204).

4. The heating device according to claim 2, characterized in that, The heating device also includes a temperature controller (40); The temperature controller (40) is fixedly connected to the housing (201), and the temperature controller (40) is electrically connected to the controller (204).

5. The heating device according to claim 4, characterized in that, The heating device also includes a temperature sensor (50); The temperature sensor (50) is fixedly connected to the housing (201), and the temperature sensor (50) is electrically connected to the controller (204).

6. The heating device according to claim 1, characterized in that, The vacuum assembly (30) further includes: an air extraction pipe (303) and a vacuum valve (304); One end of the extraction pipe (303) is connected to the vacuum pump (301), and the other end of the extraction pipe (303) is connected to the housing (201). The vacuum valve (304) is installed on the extraction pipe (303).

7. The heating device according to claim 2, characterized in that, The heating box (20) also includes a door panel (205); The door panel (205) is movably connected to the box body (201).

8. The heating device according to claim 7, characterized in that, The heating box (20) also includes a sealing strip; The sealing strip is fixedly connected to the door panel (205).

9. The heating device according to claim 2, characterized in that, The heating device includes multiple heating boxes (20) and a main controller; The main controller is electrically connected to the controller (204) of each of the heating boxes (20).

10. The heating device according to claim 9, characterized in that, The heating device also includes an operation panel (60); The operation panel (60) is fixedly connected to the outer casing (10), and the operation panel (60) is electrically connected to the main controller.

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