Drying oven device

Abstract

The utility model discloses a drying oven device, which belongs to the technical field of lithium battery preparation and comprises a guide conveying mechanism, an infrared radiation heating device and a hot air device which are arranged in a drying oven, and a foil inlet and a foil outlet are formed in the side wall of a drying oven body; the head end and the tail end of the guide conveying mechanism are connected with the foil inlet and the foil outlet through foil belts moving on the guide conveying mechanism respectively. The hot air device is arranged on the top wall in the drying oven; the infrared radiation heating devices are distributed in the drying oven, the infrared radiation heating principle is utilized, the guide conveying mechanism is combined to quickly and uniformly heat the electrode plates, and release of internal stress of the rolled electrode plates and quick discharge of moisture and volatile substances can be effectively promoted; and the quality of the electrode plate after the rolling process is ensured, so that the performance of the lithium battery is improved.

Description

Technical Field

[0001] The utility model relates to an oven device, belonging to the technical field of lithium battery preparation. Background Art

[0002] Lithium batteries are high-performance energy storage devices widely used today and are widely used in electric vehicles, mobile devices, and energy storage systems. The core components of lithium batteries are the positive and negative electrode plates, which are prepared through a rolling process. The rolling process is a process of processing metal foil or composite sheet materials into the required thickness and shape by applying pressure between a pair of rollers.

[0003] During the preparation of electrode plates, after processing operations such as rolling, the electrode plates will face problems of mechanical compression and internal stress generation. The deformation and internal stress concentration problems of the electrode plate foils caused by rolling may affect the stability and performance of the battery. Therefore, there is an urgent need to design a device that can solve this problem to accelerate the springback of the electrode plate and slow down the internal stress. Summary of the Invention

[0004] The utility model aims to provide an oven device. By utilizing the heating principle of infrared radiation and combining with a guiding and conveying mechanism to rapidly and uniformly heat the electrode plate, it can effectively promote the release of internal stress and the rapid discharge of moisture and volatile substances in the electrode plate after rolling, ensuring the quality of the electrode plate after the rolling process, thereby improving the performance of the lithium battery.

[0005] To achieve the above object, the utility model is implemented by adopting the following technical solutions.

[0006] The utility model provides an oven device, including: a guiding and conveying mechanism arranged inside the oven, an infrared radiation heating device, and a hot air device. There are a foil inlet and a foil outlet opened on the side wall of the oven box body;

[0007] The head and tail ends of the guiding and conveying mechanism are respectively connected to the foil inlet and the foil outlet through a foil belt moving on it;

[0008] The infrared radiation heating devices are distributed inside the oven;

[0009] The hot air device is arranged on the top wall inside the oven to provide hot air with adjustable flow rate to the inside of the oven.

[0010] Optionally, the guiding and conveying mechanism includes a plurality of main guide rollers and secondary guide rollers. The main guide rollers are respectively arranged at the foil inlet and the foil outlet to drive the negative electrode plate belt entering and leaving the inside of the oven, and the secondary guide rollers are distributed inside the oven to guide the negative electrode plate belt inside the oven.

[0011] Optionally, the successive connecting lines between each main over-roller and the slave over-roller are wavy.

[0012] Optionally, the hot air device includes a hot air inlet device and a hot air outlet device;

[0013] The oven device further includes an air inlet fan, an exhaust fan, and an exhaust duct. The exhaust fan is fixed on the outer side wall of the oven box body and is used to discharge the hot air and volatile substances inside the oven;

[0014] The hot air inlet device includes an air inlet, an air outlet, and a return air outlet. The air inlet is connected to the air inlet fan. The return air outlet faces the hot air outlet device. The air outlet faces the inside of the oven and includes a plurality of air outlet mechanisms with adjustable outlet air volume. The hot air outlet device is connected to the exhaust fan through the exhaust duct.

[0015] Optionally, the air outlet mechanism includes an air distribution orifice plate and a shielding component arranged below the air distribution orifice plate. The shielding component has an opening with adjustable opening degree for adjusting the hot air flow rate and wind speed entering the inside of the oven.

[0016] Optionally, the oven device further includes a fan support device. The fan support device is arranged outside the oven box body, and the air inlet fan is arranged on the fan support device.

[0017] Optionally, the oven device further includes a filtering device. The filtering device is arranged between the air inlet fan and the air inlet of the hot air inlet device.

[0018] Optionally, the filtering device uses a filter to pre-filter the hot air entering the inside of the oven.

[0019] Optionally, the oven device further includes a heat energy recovery device. The heat energy recovery device is fixed on the outer side wall of the oven box body and is used to recover the excess heat energy inside the oven.

[0020] Optionally, the infrared radiation heating device uses infrared heating tubes, and the infrared heating tubes are distributed on the side of the negative electrode strip.

[0021] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows: This device utilizes the heating principle of infrared radiation. Inside the oven equipped with an infrared radiation heating device, the foil strip is conveyed and guided through the roller assembly, capable of quickly and evenly heating the electrode sheet after rolling, ensuring the release of internal stress and the rapid removal of volatile substances, and improving the performance and quality of the battery electrode sheet and the lithium battery; The hot air inlet device is designed as a structure with adjustable opening size, ensuring uniform distribution of the hot air volume and temperature inside the oven; A filtering device is provided between the inlet air fan and the hot air inlet device, ensuring the cleanliness and safety of the heating process and effectively improving the quality of the electrode sheet; By combining the data acquisition module and the control module, parameters such as temperature, humidity, and air flow inside the oven can be monitored and adjusted, flexibly adjusting the heating temperature and time according to production requirements, optimizing the production process, ensuring product quality, and effectively improving the rebound effect of the electrode sheet and reducing the internal stress through precise control of the heating temperature and time, enabling the electrode sheet to reach the required state within a short time. Brief Description of the Drawings

[0022] Figure 1 The following shows a schematic structural diagram of the interior of the oven in an embodiment of the present utility model.

[0023] Figure 2 The following shows a schematic structural diagram of the outer frame of the oven in an embodiment of the present utility model.

[0024] In the figure: 1, main over-roller; 2, infrared heating lamp tube; 3, hot air inlet device; 4, hot air outlet device; 5, foil inlet; 6, foil outlet; 7, oven outer frame; 8, exhaust duct; 9, fan support device; 10, inlet air fan; 11, filtering device; 12, heat recovery device; 13, exhaust fan; 14, secondary over-roller. Detailed Embodiment

[0025] The present utility model will be further described below in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances. Embodiment 1

[0028] This embodiment provides an oven device, including: a guiding and conveying mechanism arranged inside the oven, an infrared radiation heating device, and a hot air device. A foil inlet 5 and a foil outlet 6 are provided on the side wall of the oven box body;

[0029] The head and tail ends of the guiding and conveying mechanism are respectively connected to the foil inlet 5 and the foil outlet 6 through a foil belt moving thereon;

[0030] The infrared radiation heating devices are distributed inside the oven;

[0031] The hot air device is arranged on the top wall inside the oven. Embodiment 2

[0032] As Figure 1 and Figure 2 shown, on the basis of Embodiment 1, the following design is also made in this embodiment.

[0033] In battery preparation, the processes and material properties required for the negative electrode and the positive electrode are different, resulting in different internal stresses and compression degrees they face after processing operations such as rolling. Usually, the negative electrode is composed of materials such as graphite and is more sensitive to mechanical stress, resulting in more significant problems of mechanical compression and internal stress in the preparation of the negative electrode sheet. The deformation and internal stress concentration problems of the negative electrode sheet caused by rolling may affect the stability and performance of the battery. Therefore, in this embodiment, the foil strip is a negative electrode sheet strip, such as Figure 1 and 2 shown, a main over-roller 1 is respectively arranged at the foil inlet 5 and the foil outlet 6 for driving the negative electrode sheet strip entering and exiting the inside of the oven, and the secondary over-roller 14 is used for guiding the negative electrode sheet strip. The sequential connection lines between the over-rollers 1 are in a square wave waveform. Infrared heating lamps 2 are arranged on the side of the negative electrode sheet strip for quickly and uniformly heating the negative electrode sheet. The foil inlet 5 and the foil outlet 6 are used for the entry and exit of the negative electrode sheet strip to ensure a stable operation process inside the device. A hot air inlet device 3 and a hot air outlet device 4 are arranged on the inner wall of the top of the oven for controlling the inflow and outflow of hot air in the oven to ensure uniform temperature distribution. The hot air inlet device 3 includes a plurality of air outlet mechanisms with outlets facing the inside of the oven; the air outlet mechanism includes an air distribution orifice plate and a shielding assembly arranged below the air distribution orifice plate. The shielding assembly includes two baffle plates respectively arranged at the lower ends on both sides of the air distribution orifice plate. The two baffle plates have a closed state and an open state. When the baffle plates are in the closed state, they completely shield the air distribution orifice plate. When the baffle plates are in the open state, their opening degree is adjustable for adjusting the hot air flow rate and wind speed entering the inside of the oven.

[0034] The oven outer frame 7 constitutes the frame structure of the overall equipment, fixing and supporting each device component; the hot air outlet device 4 is connected to the exhaust fan 13 through the exhaust duct 8, and the exhaust fan 13 discharges the hot air and volatile substances in the oven through the exhaust duct 8 to maintain the circulation and stability of the hot air; the fan support device 9 is arranged outside the oven outer frame 7 for providing support for the inlet fan 10 to ensure the stable operation of the inlet fan 10; the inlet fan 10 is connected to the air inlet of the hot air inlet device 3 for introducing external air into the heating process; a filtering device 11 is arranged between the inlet fan 10 and the hot air inlet device 3, and it uses a high-efficiency filter to ensure the environmental cleanliness during the heating process and reduce the influence of impurities on the negative electrode sheet; a heat energy recovery device 12 is arranged on the outer wall of the oven outer frame 7 for recovering and utilizing part of the heat energy to improve the energy utilization efficiency.

[0035] The oven device further includes a data acquisition module and a control module. The data acquisition module is disposed inside the oven. The data acquisition module includes a temperature sensor, a humidity sensor, a pressure sensor, and an air flow sensor, which are respectively used to monitor the real-time temperature, humidity, hot air flow rate and velocity inside the oven during the heating process of the negative electrode plate, as well as the internal stress of the negative electrode plate. The control module is used to control the heating time, heating temperature of the infrared heating lamp tube 2, and the hot air flow rate and velocity output by the hot air inlet device 3 according to the real-time data monitored by the data acquisition module, so as to adjust the temperature, humidity, and hot air flow rate and velocity inside the oven.

[0036] The oven device can also be added with a quality control module and an automatic operation module. The quality control module is disposed outside the oven box and close to the foil outlet 6. The quality control module is used to evaluate and screen the quality of the heated negative electrode plate. The automatic operation module includes robotic arms respectively disposed outside the foil inlet 5 and the foil outlet 6. The robotic arms are used to send the rolled negative electrode plate strip into the main over-roller 1 inside the oven through the foil inlet 5 and take out the heated negative electrode plate strip from inside the oven through the foil outlet 6 and send it into the quality control module. By introducing the quality control module and the automated operation module, the intelligent level of the equipment and the production management efficiency can be improved, and the production process of the electrode plate can be further optimized. Embodiment 3

[0037] This embodiment provides a method for using an oven device, including the following steps.

[0038] 1. Preparation work

[0039] Ensure that the device is in a closed state, and check the working status and safety of each device component;

[0040] Check whether key components such as the infrared heating lamp tube 2, the exhaust fan 13, and the inlet fan 10 are operating normally.

[0041] 2. Start the device

[0042] Turn on the power and start the device to ensure that all components are working properly;

[0043] Check the hot air inlet and outlet devices to ensure the uniform flow and temperature of the hot air.

[0044] 3. Load the electrode plate

[0045] Send the negative electrode plate after being rolled by the roller 1 into the conveyor belt inside the oven through the foil inlet 5, and let the negative electrode plate enter the heating area through the over-roller 1.

[0046] 4. Heating treatment

[0047] Start the infrared heating lamp tube 2 to perform infrared radiation heating on the negative electrode plate;

[0048] Turn on the inlet air blower 10 to ensure uniform temperature distribution during the heating process;

[0049] Control the heating time and temperature to ensure heating between 110°C and 130°C, and control the tape running speed of the electrode plate so that its movement time in the oven is within the range of several seconds to dozens of seconds.

[0050] 5. Process Monitoring and Regulation

[0051] Monitor parameters such as temperature, humidity, and air flow in the oven through the data acquisition module;

[0052] Adjust the heating temperature and time according to the real-time data through the control module to optimize the springback effect and internal stress release of the negative electrode plate.

[0053] 6. Discharge the Electrode Plate

[0054] After the heating is completed, the negative electrode plate will be discharged from the oven through the foil outlet 6 and flow to the slitting and winding device.

[0055] 7. Device Shutdown

[0056] Turn off devices such as the infrared heating lamp tube 2 and the inlet air blower 10;

[0057] Disconnect the power supply and perform necessary cleaning and maintenance on the device.

[0058] 8. Recording and Analysis

[0059] Record the key parameters during the heating process, including information such as temperature and time;

[0060] Analyze and evaluate the heating effect and the state of the negative electrode plate to optimize subsequent operations or adjust device parameters.

[0061] The above is only the preferred implementation mode of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. An oven device, characterized in that, Comprising: A guiding and conveying mechanism, an infrared radiation heating device and a hot air device disposed inside the oven. A foil inlet (5) and a foil outlet (6) are provided on the side wall of the oven body; The head and tail ends of the guiding and conveying mechanism are respectively connected to the foil inlet (5) and the foil outlet (6) through a foil belt moving thereon; The infrared radiation heating devices are distributively arranged inside the oven; The hot air device is arranged on the top wall inside the oven; The guiding and conveying mechanism includes a main idler roller (1) and a slave idler roller (14). The main idler roller (1) is respectively arranged at the foil inlet (5) and the foil outlet (6), and the slave idler roller (14) is distributively arranged inside the oven; The successive connection lines between each main idler roller (1) and the slave idler roller (14) are in a waveform; The hot air device includes a hot air inlet device (3) and a hot air outlet device (4); The oven device further includes an inlet air blower (10), an exhaust air blower (13) and an exhaust duct (8). The exhaust air blower (13) is fixed on the outer side wall of the oven body to discharge the hot air and volatile substances inside the oven; The hot air inlet device (3) includes an air inlet, an air outlet and a return air port. The air inlet is connected to the inlet air blower (10), the return air port faces the hot air outlet device (4), the air outlet faces the inside of the oven and includes a plurality of air outlet mechanisms with adjustable outlet air volume. The hot air outlet device (4) is connected to the exhaust air blower (13) through the exhaust duct (8); The air outlet mechanism includes an air distribution orifice plate and a shielding assembly arranged below the air distribution orifice plate. The shielding assembly has an opening with adjustable opening degree.

2. The oven device according to claim 1, characterized in that, It further includes a blower support device (9). The blower support device (9) is arranged outside the oven body, and the inlet air blower (10) is arranged on the blower support device (9).

3. The oven device according to claim 1, characterized in that, It further includes a filtering device (11). The filtering device (11) is arranged between the inlet air blower (10) and the air inlet of the hot air inlet device (3).

4. The oven device according to claim 3, characterized in that, The filtering device uses a filter to perform pre-filtering on the hot air entering the inside of the oven.

5. The oven device according to claim 1, characterized in that, It further includes a heat energy recovery device (12). The heat energy recovery device (12) is fixed on the outer side wall of the oven body.

6. The oven device according to any one of claims 1 to 5, characterized in that, The infrared radiation heating device uses infrared heating lamps (2), and the infrared heating lamps (2) are distributively arranged on the side of the foil belt.

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