Infrared drying device and drying oven equipment

Abstract

The invention discloses an infrared drying device and drying oven equipment, the infrared drying device comprises an infrared module, a porous graphite pressure reduction module and a gas compression module, the infrared module comprises a shell, a pressing plate and an infrared plate, the top end of the pressing plate is arranged at the bottom end of the shell in a sealed mode and provided with a groove, and the porous graphite pressure reduction module is arranged in the groove. The infrared plate is arranged at the bottom of the groove, the back face of the infrared plate is in sealing fit with the bottom end of the shell, a positive pressure cavity is defined between the infrared plate and the shell, a light outlet communicated with the groove is formed in the bottom end of the pressing plate and corresponds to the infrared plate, the shell is connected with an air inlet pipe and an air outlet pipe, and the air inlet pipe is communicated with the air outlet pipe. The gas inlet pipe and the gas outlet pipe are both communicated with the positive pressure cavity, the gas inlet pipe is connected with the porous graphite pressure reduction module, the porous graphite pressure reduction module is connected with a connecting gas pipe, and the connecting gas pipe is connected with the gas compression module. The safety in the drying process can be improved.

Description

Technical Field

[0001] This invention relates to the field of lithium battery production technology, specifically to an infrared drying device and drying oven. Background Technology

[0002] Traditional lithium battery electrode drying processes generally employ hot air drying technology, which involves blowing hot air onto the electrodes through nozzles inside an oven to heat and dry the slurry layer. This method has the following drawbacks: 1. High thermal resistance and low heat transfer efficiency, resulting in difficulty in uniform heat penetration; 2. Uncontrolled drying gradient, leading to rapid drying and hardening of the slurry surface while leaving solvent residue inside, or excessive dehydration of the surface during internal drying, which can induce structural defects such as microcracks in the electrode.

[0003] To overcome the aforementioned drawbacks, infrared radiation heating and drying technology is currently commonly used. Specifically, an infrared module inside an oven radiates infrared rays onto the electrode, directly exciting the molecular vibrations within the slurry to generate heat, thus drying the slurry layer of the electrode. However, because the infrared module is located inside the oven, NMP (N-methylpyrrolidone) vapor generated during the heating and drying process can enter the infrared module. Overheating on the back of the infrared plate of the module, combined with contact with the NMP vapor, can easily lead to combustion or explosion, reducing the safety of the drying process. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides an infrared drying device and drying oven equipment, which can improve the safety of the drying process.

[0005] The technical solution adopted by this invention to solve its technical problem is: A first aspect of the present invention provides an infrared drying device, comprising an infrared module, a porous graphite decompression module, and a gas compression module. The infrared module includes a housing, a pressure plate, and an infrared plate. The top end of the pressure plate is sealed to the bottom end of the housing and has a groove. The infrared plate is placed at the bottom of the groove, and the back end of the infrared plate is sealed to the bottom end of the housing. A positive pressure cavity is formed between the infrared plate and the housing. The bottom end of the pressure plate has a light outlet communicating with the groove, and the light outlet corresponds to the infrared plate. The housing is connected to an air inlet pipe and an air outlet pipe, both of which communicate with the positive pressure cavity. The air inlet pipe is connected to the porous graphite decompression module, and the porous graphite decompression module is connected to a connecting air pipe, which is connected to the gas compression module.

[0006] As a preferred technical solution, the intake pipe is connected to a branch pipe, the branch pipe is connected to a first pressure gauge, and the exhaust pipe is connected to a second pressure gauge.

[0007] As a preferred technical solution, the top end of the pressure plate is detachably mounted on the bottom end of the housing via an infrared fastener, and a first infrared sealing gasket is sandwiched between the top end of the pressure plate and the bottom end of the housing; a second infrared sealing gasket is sandwiched between the back end of the infrared plate and the bottom end of the housing.

[0008] As a preferred technical solution, a temperature sensor is embedded on the back of the infrared plate.

[0009] As a preferred technical solution, a U-shaped reflector is provided inside the positive pressure cavity. The horizontal part of the reflector is close to the inner wall of the top of the positive pressure cavity and opposite to the infrared plate. The two vertical parts of the reflector are close to the inner walls of the two sides of the positive pressure cavity, respectively.

[0010] As a preferred technical solution, the porous graphite pressure reducing module includes a housing, a pressure cap, and a porous graphite block. One end of the pressure cap is sealed at one end of the housing, and the pressure cap and the housing enclose an inner cavity. The porous graphite block is disposed in the inner cavity and divides the inner cavity into a first chamber and a second chamber. The other end of the pressure cap is connected to the connecting air pipe, which communicates with the first chamber. The air inlet pipe is connected to the other end of the housing and communicates with the second chamber.

[0011] As a preferred technical solution, one end of the pressure cap is detachably disposed at one end of the housing via a pressure-reducing fastener, and a first pressure-reducing sealing gasket is sandwiched between one end of the pressure cap and one end of the housing; a second pressure-reducing sealing gasket is sandwiched between one end of the porous graphite block and one end of the pressure cap, a step is formed on the inner wall of the second chamber, and a third pressure-reducing sealing gasket is sandwiched between the other end of the porous graphite block and the step.

[0012] As a preferred technical solution, the gas compression module includes a main air compressor, a backup air compressor, and a solenoid valve. The main air compressor is connected to a first connecting pipe, and the backup air compressor is connected to a second connecting pipe. Both the first and second connecting pipes are connected to the solenoid valve, and the connecting air pipe is connected to the solenoid valve.

[0013] As a preferred technical solution, the connecting air pipe is provided with a triplet and a pressure regulating valve in sequence along the direction close to the porous graphite pressure reducing module.

[0014] A second aspect of the present invention provides an oven device, including an oven with an inlet and an outlet at both ends, characterized in that it further includes the infrared drying device described in the above technical solution, wherein the infrared module of the infrared drying device is disposed inside the oven and above the electrode, and the porous graphite decompression module and the gas compression module of the infrared drying device are both disposed outside the oven, and the air inlet pipe and the air outlet pipe both extend out from the oven.

[0015] The beneficial effects of this invention are as follows: This invention is equipped with an infrared module, a porous graphite pressure reducing module, and a gas compression module. The gas compression module compresses air into high-pressure gas, which then enters the porous graphite pressure reducing module via a connecting pipe. The porous graphite pressure reducing module stably reduces the pressure of the high-pressure gas to a set positive pressure value. The reduced positive pressure gas then enters the positive pressure chamber of the infrared module via an inlet pipe and then flows out via an outlet pipe. By continuously supplying reduced positive pressure gas into the positive pressure chamber of the infrared module, a positive pressure state can be maintained within the positive pressure chamber, thereby forming a stable pressure barrier higher than the internal environment of the oven. Furthermore, the top of the pressure plate is sealed at the bottom of the outer shell, and the infrared plate is sealed to the bottom of the outer shell. This prevents NMP vapor from entering the positive pressure chamber from the oven, thus avoiding overheating of the back of the infrared plate and subsequent contact with NMP vapor, which could lead to combustion or explosion, thereby improving safety during the drying process. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of an infrared drying device provided in an embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the infrared module and porous graphite pressure reducing module of the infrared drying device shown from the first angle. Figure 3 yes Figure 2 A schematic diagram of the second angle of the infrared module and the porous graphite decompression module shown; Figure 4 yes Figure 2 An exploded view of the infrared module and the porous graphite decompression module shown. Figure 5 yes Figure 2 A cross-sectional schematic diagram of the infrared module shown. Figure 6 yes Figure 2 The schematic diagram shows the outer shell of the infrared module and the structure of the porous graphite pressure reducing module. Figure 7 yes Figure 2 The diagram shows the structure of the porous graphite pressure-reducing module. Figure 8 yes Figure 7 The diagram shows a cross-sectional view of the porous graphite pressure-reducing module.

[0018] Figure label: 10. Infrared module; 11. Housing; 11a. Positive pressure chamber; 111. First infrared sealing gasket; 1111. Sealing gasket mounting hole; 112. Housing mounting hole; 113. First infrared gas tube sealing connector; 114. Second infrared gas tube sealing connector; 115a. First explosion-proof gland; 115b. Second explosion-proof gland; 116. Slot; 12. Pressure plate; 121. Pressure plate mounting hole; 122. Groove; 123. Light outlet; 13. Infrared plate; 131. Second infrared sealing gasket; 132. Embedded groove; 14. Reflector; 141. Horizontal part; 142. Vertical part; 1421. Extension part; 20. Porous graphite pressure relief module; 21. Housing; 211. First pressure relief pipe sealing joint; 212. First chamber; 213. Second chamber; 214. Step; 22. Pressure cap; 221. Pressure relief fastener; 222. First pressure relief sealing gasket; 223. Second pressure relief pipe sealing joint; 23. Porous graphite block; 24. Second pressure relief sealing gasket; 25. Third pressure relief sealing gasket; 30. Gas compression module; 31. Main air compressor; 311. First connecting pipe; 32. Backup air compressor; 321. Second connecting pipe; 33. Solenoid valve; 40. Connecting air pipe; 50. Air inlet pipe; 60. Air outlet pipe; 70. Branch pipe; 80. First pressure gauge; 90. Second pressure gauge; 100. Triple unit; 110. Pressure regulating valve. Detailed Implementation

[0019] The following will clearly and completely describe the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this invention can be combined interactively without contradicting each other.

[0020] Please refer to Figure 1 An embodiment of the present invention provides an infrared drying device, including an infrared module 10, a porous graphite decompression module 20, and a gas compression module 30.

[0021] Combination Figures 2 to 6 As shown, the infrared module 10 includes a housing 11, a pressure plate 12, and an infrared plate 13.

[0022] The top of the pressure plate 12 is sealed at the bottom of the outer casing 11 and has a groove 122. The infrared plate 13 is placed at the bottom of the groove 122, and the back of the infrared plate 13 is sealed to the bottom of the outer casing 11. The infrared plate 13 and the outer casing 11 enclose a positive pressure cavity 11a. The bottom of the pressure plate 12 has a light outlet 123 that communicates with the groove 122 and corresponds to the infrared plate 13. The outer casing 11 is connected to an air inlet pipe 50 and an air outlet pipe 60, both of which communicate with the positive pressure cavity 11a. The air inlet pipe 50 is connected to a porous graphite pressure reducing module 20, which is connected to a connecting air pipe 40, which is connected to a gas compression module 30.

[0023] In practical applications, the infrared module 10 is installed inside the oven of the drying equipment and located above the electrode sheet. The porous graphite pressure reducing module 20 and the gas compression module 30 are installed outside the oven, with the inlet pipe 50 and outlet pipe 60 extending out of the oven. After the infrared plate 13 is powered on, it can radiate infrared rays to the electrode sheet through the light outlet 123, thereby heating and drying the slurry layer of the electrode sheet. The infrared plate 13 has high heat transfer efficiency, which improves the drying speed and efficiency. The gas compression module 30 can compress air into high-pressure gas, which can then enter the porous graphite pressure reducing module 20 through the connecting pipe 40. The porous graphite pressure reducing module 20 can stably reduce the pressure of the high-pressure gas to a set positive pressure value. The pressure of the positive pressure gas after pressure reduction is 100 Pa. The positive pressure gas after pressure reduction can then enter the positive pressure chamber 11a through the inlet pipe 50 and then flow out through the outlet pipe 60. By continuously introducing depressurized positive pressure gas into the positive pressure chamber 11a of the infrared module 10, the positive pressure chamber 11a can always maintain a positive pressure state, thereby forming a stable pressure barrier in the positive pressure chamber 11a that is higher than the internal environment of the oven. Furthermore, the top of the pressure plate 12 is sealed at the bottom of the outer shell 11, and the bottom of the infrared plate 13 is sealed to the bottom of the outer shell 11. This prevents NMP vapor from entering the positive pressure chamber 11a from the oven, thus avoiding overheating of the back of the infrared plate 13 and subsequent combustion or explosion upon contact with NMP vapor, thereby improving safety during the drying process.

[0024] The inlet pipe 50 is connected to a branch pipe 70, which is connected to a first pressure gauge 80. The outlet pipe 60 is connected to a second pressure gauge 90. Both the first and second pressure gauges 80 are used for electrical connection to the safety monitoring system. In practical applications, both the first and second pressure gauges 80 and 90 are located outside the oven. The branch pipe 70 extends out of the oven. After the high-pressure gas is stably reduced to a set positive pressure value by the porous graphite pressure reducing module 20, the gas is split into two outputs. One output can enter the positive pressure chamber 11a through the inlet pipe 50, and the other output can enter the branch pipe 70 through the inlet pipe 50, and then enter the first pressure gauge 80. The first pressure gauge 80 can be used to monitor the reduced pressure positive pressure gas output by the porous graphite pressure reducing module 20. The pressure is monitored to ensure that the pressure of the positive pressure gas after depressurization meets the set requirement, which is about 100Pa. The gas flowing out from the outlet pipe 60 can enter the second pressure gauge 90. The second pressure gauge 90 can monitor the gas pressure in the positive pressure chamber 11a to ensure that its positive pressure state is stable. When the value detected by any pressure gauge is lower than the set safe positive pressure threshold (i.e., insufficient positive pressure or failure is detected), the safety monitoring system will immediately trigger an alarm and interlock to cut off the power supply of the infrared plate 13 to ensure the safe shutdown of the device.

[0025] Both the first pressure gauge 80 and the second pressure gauge 90 are explosion-proof electronic differential pressure gauges.

[0026] In this embodiment, the top end of the pressure plate 12 is detachably mounted on the bottom end of the outer casing 11 using infrared fasteners such as screws. A first infrared sealing gasket 111 is sandwiched between the top end of the pressure plate 12 and the bottom end of the outer casing 11. The first infrared sealing gasket 111 serves a sealing function, preventing NMP vapor in the oven from entering the positive pressure chamber 11a. The first infrared sealing gasket 111 is, for example, a Teflon gasket.

[0027] Specifically, the top of the pressure plate 12 is provided with a pressure plate mounting hole 121, and the bottom of the outer casing 11 is provided with an outer casing mounting hole 112 corresponding to the pressure plate mounting hole 121. The first infrared sealing gasket 111 is provided with a sealing gasket mounting hole 1111 corresponding to the pressure plate mounting hole 121. Infrared fasteners are installed in the pressure plate mounting hole 121, the sealing gasket mounting hole 1111, and the outer casing mounting hole 112. The number of pressure plate mounting holes 121, sealing gasket mounting holes 1111, and outer casing mounting holes 112 can be set according to actual conditions. By disassembling and assembling the infrared fasteners, the pressure plate 12 and the outer casing 11 can be disassembled and assembled.

[0028] By detachably setting the top of the pressure plate 12 at the bottom of the housing 11, it is easy to replace the infrared plate 13 and the first infrared sealing gasket 111. By replacing the first infrared sealing gasket 111 with different thicknesses, it can be adapted to infrared plates 13 with different thicknesses, thus having a wide range of applications.

[0029] In this embodiment, a second infrared sealing gasket 131 is sandwiched between the back of the infrared plate 13 and the bottom of the outer casing 11, thereby achieving a sealed fit between the infrared plate 13 and the bottom of the outer casing 11 through the second infrared sealing gasket 131. The second infrared sealing gasket 131 serves a sealing function, preventing NMP vapor in the oven from entering the positive pressure chamber 11a.

[0030] The second infrared sealing gasket 131 is made of special rubber materials that are antistatic, high temperature resistant, and resistant to NMP strong corrosion, such as silicone rubber and EPDM rubber.

[0031] One end of the outer casing 11 is provided with a first infrared air pipe sealing connector 113 and a second infrared air pipe sealing connector 114. The first infrared air pipe sealing connector 113 and the second infrared air pipe sealing connector 114 are arranged side by side along the width direction of the outer casing 11 and are both connected to the positive pressure chamber 11a. The first infrared air pipe sealing connector 113 is connected to the aforementioned air inlet pipe 50, and the second infrared air pipe sealing connector 114 is connected to the aforementioned air outlet pipe 60. The use of the first infrared air pipe sealing connector 113 and the second infrared air pipe sealing connector 114 facilitates the connection between one end of the outer casing 11 and the air inlet pipe 50 and the air outlet pipe 60, and ensures the airtightness between them.

[0032] Both the first infrared air pipe sealing joint 113 and the second infrared air pipe sealing joint 114 are lock nut straight pipe joints.

[0033] Furthermore, a temperature sensor is embedded on the back of the infrared plate 13. The temperature sensor is, for example, a thermocouple. One end of the outer casing 11 is connected to an infrared plate connection line corresponding to the infrared plate 13 via a first explosion-proof gland 115a, and to a sensor connection line corresponding to the temperature sensor via a second explosion-proof gland 115b. The power line of the infrared plate 13 extends into the corresponding first explosion-proof gland 115a and is electrically connected to the infrared plate connection line. The signal line of the temperature sensor extends into the corresponding second explosion-proof gland 115b and is electrically connected to the sensor connection line. In practical applications, the infrared plate connection line and the sensor connection line extend out of the oven and are used to electrically connect to the control system. Both the infrared plate connection line and the sensor connection line are high-temperature resistant and NMP corrosion resistant cables. The explosion-proof gland is an existing structure. The sealing structure inside the explosion-proof gland, such as rubber sealing rings and stuffing boxes, can prevent NMP vapor inside the oven from entering the positive pressure chamber 11a. At the same time, the explosion-proof structure design of the explosion-proof gland can eliminate the risk of explosion caused by sparks at the connection between the power line and the infrared plate connection line, and between the signal line and the sensor connection line, thus improving the safety during the drying process. The temperature sensor is used to detect the temperature on the back of the infrared plate 13. The control system can adjust the power of the infrared plate 13 according to the detected temperature value. For example, when the temperature on the back of the infrared plate 13 exceeds or falls below the set value, the control system can reduce or increase the power of the infrared plate 13. This can keep the infrared plate 13 at the set working temperature and prevent the back of the infrared plate 13 from being damaged due to overheating or from failing to heat and dry the slurry layer of the electrode due to insufficient temperature.

[0034] In this embodiment, two temperature sensors are used. Even if one temperature sensor fails, the other can still detect the temperature on the back of the infrared panel 13, ensuring the control system continues to operate normally and preventing the risk of abnormal heating or overheating of the infrared panel 13 due to a single-point failure. Understandably, the number of temperature sensors can be set according to actual conditions. There are two power cables. The number of infrared panel connection cables corresponds to the number of power cables. The number of first explosion-proof glands 115a corresponds to the number of infrared panel connection cables, the number of sensor connection cables corresponds to the number of temperature sensors, and the number of second explosion-proof glands 115b corresponds to the number of sensor connection cables.

[0035] In this embodiment, the back of the infrared plate 13 is provided with an embedding groove 132 corresponding to the temperature sensor, and the temperature sensor is embedded in the embedding groove 132.

[0036] Furthermore, a U-shaped reflector 14 is provided inside the positive pressure cavity 11a. The reflector 14 includes a horizontal portion 141 and two vertical portions 142 connected to both sides of the horizontal portion 141. The horizontal portion 141 of the reflector 14 is close to the inner wall of the top of the positive pressure cavity 11a and faces the infrared plate 13. The two vertical portions 142 of the reflector 14 are close to the inner walls of both sides of the positive pressure cavity 11a. The reflector 14 can efficiently reflect upward-radiated infrared rays downward, thereby significantly improving the energy utilization efficiency and forward projection intensity of infrared radiation, and improving the drying speed and efficiency.

[0037] In this embodiment, two extensions 1421 are formed on the side of the two vertical parts 142 away from the horizontal part 141, and a groove 116 is provided at the bottom of the outer shell 11. The two extensions 1421 are sandwiched between the second infrared sealing gasket 131 and the bottom of the groove 116, thereby fixing the reflector 14 in the positive pressure cavity 11a.

[0038] Combination Figure 7 and Figure 8 As shown, the porous graphite pressure-reducing module 20 includes a housing 21, a pressure cap 22, and a porous graphite block 23. One end of the pressure cap 22 is sealed at one end of the housing 21, forming an inner cavity between the pressure cap 22 and the housing 21. The porous graphite block 23 is disposed within the inner cavity, dividing it into a first chamber 212 and a second chamber 213. The other end of the pressure cap 22 is connected to the aforementioned connecting air pipe 40, which communicates with the first chamber 212. An air inlet pipe 50 is connected to the other end of the housing 21 and communicates with the second chamber 213. High-pressure gas can enter the first chamber 212 through the connecting air pipe 40, and then enter the micropores of the porous graphite block 23 under the action of pressure difference. When the gas flows in the micropores, flow resistance is generated, thereby stably reducing the pressure of the high-pressure gas to a set positive pressure value. The reduced positive pressure gas then enters the second chamber 213 and then enters the air inlet pipe 50. The pressure of the gas after depressurization is related to the pore size of the micropores and the thickness of the porous graphite block 23. In practical applications, the appropriate porous graphite block 23 can be selected according to the required pressure value.

[0039] The other end of the pressure cap 22 is provided with a first pressure-reducing air pipe sealing joint 223, which communicates with the first chamber 212 and is connected to the aforementioned connecting air pipe 40. The other end of the housing 21 is provided with a second pressure-reducing air pipe sealing joint 211, which communicates with the second chamber 213. The air inlet pipe 50 is connected to the second pressure-reducing air pipe sealing joint 211. The use of the first pressure-reducing air pipe sealing joint 223 and the second pressure-reducing air pipe sealing joint 211 facilitates the connection between one end of the pressure cap 22 and the connecting air pipe 40, and between the other end of the housing 21 and the air inlet pipe 50, while ensuring the airtightness between the two.

[0040] Both the first pressure-reducing air pipe sealing joint 223 and the second pressure-reducing air pipe sealing joint 211 are lock nut straight pipe joints.

[0041] One end of the pressure cap 22 is detachably mounted on one end of the housing 21 via a pressure-reducing fastener 221, such as a bolt. A first pressure-reducing sealing gasket 222 is sandwiched between one end of the pressure cap 22 and one end of the housing 21. The first pressure-reducing sealing gasket 222 serves a sealing function, preventing external air from entering the inner cavity and ensuring the overall external airtightness of the porous graphite pressure-reducing module 20.

[0042] Specifically, the pressure cap 22 has a pressure cap hole, one end of the housing 21 has a housing hole corresponding to the pressure cap hole, and the first pressure-reducing sealing gasket 222 has a sealing gasket hole corresponding to the pressure cap hole. Pressure-reducing fasteners 221 are installed in the pressure cap hole, sealing gasket hole, and housing hole. The number of pressure cap holes, sealing gasket holes, and housing holes can be set according to actual conditions. The pressure cap 22 and housing 21 can be disassembled and assembled by removing and installing the pressure-reducing fasteners 221.

[0043] A second pressure-reducing sealing gasket 24 is sandwiched between one end of the porous graphite block 23 and one end of the pressure cap 22. A step 214 is formed on the inner wall of the second chamber 213. A third pressure-reducing sealing gasket 25 is sandwiched between the other end of the porous graphite block 23 and the step 214. The second and third pressure-reducing sealing gaskets 24 and 25 prevent high-pressure gas in the first chamber 212 from entering the second chamber 213 through the gap between the porous graphite block 23 and the inner wall of the chamber. By detachably mounting one end of the pressure cap 22 at one end of the housing 21, it is easy to replace the porous graphite block 23, the first pressure-reducing sealing gasket 22, the second pressure-reducing sealing gasket 24, and the third pressure-reducing sealing gasket 25. By replacing the second and third pressure-reducing sealing gaskets 24 and 25 with different thicknesses, the thickness of the porous graphite block 23 can be precisely controlled, and the desired pressure reduction effect can be adjusted.

[0044] The first pressure-reducing sealing gasket 222, the second pressure-reducing sealing gasket 24, and the third pressure-reducing sealing gasket 25 are all Teflon gaskets.

[0045] The gas compression module 30 includes a main air compressor 31, a standby air compressor 32, and a solenoid valve 33. The main air compressor 31 is connected to a first connecting pipe 311, and the standby air compressor 32 is connected to a second connecting pipe 321. Both the first connecting pipe 311 and the second connecting pipe 321 are connected to the solenoid valve 33. The connecting air pipe 40 is also connected to the solenoid valve 33. During normal operation, the solenoid valve 33 connects the connecting air pipe 40 and the first connecting pipe 311, allowing the main air compressor 31 to compress air into high-pressure gas. This high-pressure gas then enters the connecting air pipe 40 via the first connecting pipe 311 and the solenoid valve 33, and subsequently enters the porous graphite pressure reducing module 20. When the main air compressor 31 malfunctions, the solenoid valve 33 switches the connecting air pipe 40 to the second connecting pipe 321, allowing the standby air compressor 32 to compress air into high-pressure gas. This high-pressure gas then enters the connecting air pipe 40 via the second connecting pipe 321 and the solenoid valve 33, and subsequently enters the porous graphite pressure reducing module 20. This type of gas compression module 30 ensures a continuous and stable supply of high-pressure gas.

[0046] Furthermore, such as Figure 1 As shown, a triple unit 100 (filter + pressure regulator + lubricator) and a pressure regulating valve 110 are sequentially arranged on the connecting gas pipe 40 along the direction close to the porous graphite pressure reducing module 20. The triple unit 100 can purify the high-pressure gas, avoiding contamination of the infrared plate 13 and extending the service life of the infrared plate 13. The pressure regulating valve 110 can perform initial pressure setting of the high-pressure gas. The pressure regulating valve 110 is a precision pressure regulating valve, which can accurately control the gas pressure.

[0047] The present invention also provides an oven device, including an oven and the aforementioned infrared drying device. The oven has an inlet and an outlet at both ends. The infrared module 10 of the infrared drying device is disposed inside the oven and above the electrode plates. The porous graphite pressure reducing module 20 and the gas compression module 30 of the infrared drying device are both disposed outside the oven. The inlet pipe 50 and the outlet pipe 60 both extend from the oven. The first pressure gauge 80 and the second pressure gauge 90 of the infrared drying device are both disposed outside the oven and are used for electrical connection to a safety monitoring system. The branch pipe 70 extends from the oven. The infrared plate connection wire and the sensor connection wire extend from the oven and are used for electrical connection to the control system. In practical applications, the electrode enters the drying oven through the inlet. Infrared rays are radiated onto the electrode through the light outlet 123 of the pressure plate 12 via the infrared plate 13, thereby heating and drying the slurry layer of the electrode. The electrode then exits through the outlet. During this process, the air is compressed into high-pressure gas by the gas compression module 30. The high-pressure gas then enters the porous graphite pressure reducing module 20 through the connecting pipe 40. The porous graphite pressure reducing module 20 stably reduces the pressure of the high-pressure gas to a set positive pressure value. The pressure of the positive pressure gas after pressure reduction is approximately 100 Pa. The pressure-reduced positive pressure gas then enters the positive pressure chamber 11a through the inlet pipe 50 and then flows out through the outlet pipe 60. By using the above-mentioned infrared drying device, NMP vapor in the drying oven can be prevented from entering the positive pressure chamber 11a, thereby avoiding overheating of the back of the infrared plate 13 and subsequent contact with NMP vapor, which could lead to combustion or explosion, thus improving the safety of the drying process.

[0048] The above is a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An infrared drying device, characterized in that, The system includes an infrared module, a porous graphite pressure-reducing module, and a gas compression module. The infrared module comprises a housing, a pressure plate, and an infrared plate. The top of the pressure plate is sealed at the bottom of the housing and has a groove. The infrared plate is placed at the bottom of the groove, and the back of the infrared plate is sealed to the bottom of the housing. The infrared plate and the housing enclose a positive pressure cavity. The bottom of the pressure plate has a light outlet communicating with the groove, and the light outlet corresponds to the infrared plate. The housing is connected to an inlet pipe and an outlet pipe, both of which communicate with the positive pressure cavity. The inlet pipe is connected to the porous graphite pressure-reducing module, and the porous graphite pressure-reducing module is connected to a connecting pipe, which is connected to the gas compression module.

2. The infrared drying device according to claim 1, characterized in that, The intake pipe is connected to a branch pipe, the branch pipe is connected to a first pressure gauge, and the exhaust pipe is connected to a second pressure gauge.

3. The infrared drying apparatus according to claim 1, characterized in that, The top of the pressure plate is detachably mounted on the bottom of the outer casing via an infrared fastener. A first infrared sealing gasket is sandwiched between the top of the pressure plate and the bottom of the outer casing. A second infrared sealing gasket is sandwiched between the back of the infrared plate and the bottom of the outer casing.

4. The infrared drying device according to claim 1, characterized in that, A temperature sensor is embedded on the back of the infrared plate.

5. The infrared drying apparatus according to claim 1, characterized in that, The positive pressure cavity is equipped with a U-shaped reflector. The horizontal part of the reflector is close to the inner wall of the top of the positive pressure cavity and opposite to the infrared plate. The two vertical parts of the reflector are close to the inner walls of the two sides of the positive pressure cavity, respectively.

6. The infrared drying apparatus according to claim 1, characterized in that, The porous graphite pressure relief module includes a housing, a pressure cap, and a porous graphite block. One end of the pressure cap is sealed at one end of the housing, and the pressure cap and the housing enclose an inner cavity. The porous graphite block is disposed in the inner cavity and divides the inner cavity into a first chamber and a second chamber. The other end of the pressure cap is connected to the connecting air pipe, which communicates with the first chamber. The air inlet pipe is connected to the other end of the housing and communicates with the second chamber.

7. The infrared drying apparatus according to claim 6, characterized in that, One end of the pressure cap is detachably mounted on one end of the housing via a pressure-reducing fastener. A first pressure-reducing sealing gasket is sandwiched between one end of the pressure cap and one end of the housing. A second pressure-reducing sealing gasket is sandwiched between one end of the porous graphite block and one end of the pressure cap. A step is formed on the inner wall of the second chamber. A third pressure-reducing sealing gasket is sandwiched between the other end of the porous graphite block and the step.

8. The infrared drying apparatus according to claim 1, characterized in that, The gas compression module includes a main air compressor, a backup air compressor, and a solenoid valve. The main air compressor is connected to a first connecting pipe, and the backup air compressor is connected to a second connecting pipe. Both the first and second connecting pipes are connected to the solenoid valve, and the connecting air pipe is connected to the solenoid valve.

9. The infrared drying apparatus according to claim 1, characterized in that, The connecting air pipe is provided with a triplet and a pressure regulating valve in sequence along the direction close to the porous graphite pressure reducing module.

10. A drying oven apparatus, comprising a drying oven having an inlet and an outlet at both ends, characterized in that, It also includes the infrared drying device as described in any one of claims 1-9, wherein the infrared module of the infrared drying device is disposed inside the drying oven and above the electrode, the porous graphite decompression module and the gas compression module of the infrared drying device are both disposed outside the drying oven, and the air inlet pipe and the air outlet pipe both extend out from the drying oven.

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