Circulating drying device for battery raw materials

Abstract

The invention discloses a battery raw material circulation drying device which comprises a drying box, an air heater is arranged outside the drying box, a dehumidification box is arranged between the drying box and the air heater, the drying box is connected with the air heater through a hot air pipe, the drying box is connected with the dehumidification box through a backflow pipe, a partition plate is arranged in the drying box, and an upper air duct and a lower air duct are arranged in the drying box. The upper air channel and the lower air channel are located on the upper side and the lower side of the partition plate and provided with corresponding material passing openings, stirring propellers are arranged in the upper air channel and the lower air channel, an air guide fan is arranged on the left side of the upper air channel, an air guide fan is arranged on the right side of the lower air channel, and a temperature sensor and a humidity sensor are further arranged in the drying box. By arranging the upper air duct and the lower air duct and arranging the air guide fans in the upper air duct and the lower air duct, flowing of hot air in the drying box is promoted, and the drying speed is increased. A temperature sensor and a humidity sensor are arranged in the drying box, the temperature and humidity in the drying box can be monitored in real time, and data support is provided for accurately controlling the drying process. The PLC can automatically adjust the operation states of the air heater, the air guide fan, the electromagnetic valve, the dehumidification fan and other devices according to feedback signals of the temperature sensor and the humidity sensor, and it is ensured that the drying process is conducted under the optimal temperature and humidity conditions.

Description

Technical Field

[0001] The invention mainly relates to the technical field of battery production, and in particular to a battery raw material circulation drying device. Background Art

[0002] Lithium battery refers to a battery containing lithium (including metallic lithium, lithium alloys and lithium ions, lithium polymers) in the electrochemical system. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium metal batteries are usually non-rechargeable and contain metallic lithium. Lithium ion batteries do not contain metallic lithium and are rechargeable.

[0003] Since the moisture in the battery raw materials will have a serious impact on the performance of the battery, the battery raw material particles need to be dried during the battery production process. The traditional drying method is to place the battery raw material particles directly on the drying plate of the drying box for operation. The battery raw material particles are easily accumulated on the drying plate, resulting in the inability to effectively dry the internal raw materials during drying, and the drying effect is poor. At the same time, during the drying process, the water vapor generated by the drying cannot be quickly discharged, which also affects the drying efficiency. Further improvements can be made. Summary of the invention

[0004] The present invention mainly provides a battery raw material circulation drying device to solve the technical problems raised in the above background technology.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: A battery raw material circulation drying device, comprising a drying box, a hot air blower is arranged outside the drying box, and a dehumidification box is arranged between the drying box and the hot air blower; The drying box is connected to the hot air blower through a hot air pipe, and the drying box is connected to the dehumidification box through a return pipe. A partition is provided in the drying box, and an upper air duct and a lower air duct are provided in the drying box. The upper air duct and the lower air duct are located on the upper and lower sides of the partition and are provided with corresponding material passing ports. A stirring propeller is provided in the upper air duct and the lower air duct. An air guide fan is provided on the left side of the upper air duct, and an air guide fan is provided on the right side of the lower air duct. A temperature sensor and a humidity sensor are also provided in the drying box.

[0006] Preferably, the air outlet end of the hot air blower is connected to the hot air duct, a return box is installed on the outside of the air inlet end of the hot air blower, an air outlet pipe is provided on one side of the return box, and an air inlet pipe is provided on the other side of the return box, solenoid valves are provided on the air outlet pipe and the air inlet pipe, and the air inlet pipe is connected to the dehumidification box.

[0007] Preferably, a dehumidification fan is provided in the dehumidification box, and a molecular sieve is also provided in the dehumidification box. The reflux pipe is connected to the surface of one side of the dehumidification box, and the other side of the dehumidification box is connected to the reflux box through the air inlet pipe.

[0008] Preferably, the hot air pipe and the return pipe are both provided with a mesh plate at one end of the drying box, the mesh plate has dense openings on its surface, and the hole diameter is smaller than the minimum particle size of the battery raw material.

[0009] Preferably, the stirring propeller comprises a stirring motor, an output end of the stirring motor is connected to a spiral stirring blade, and the output end of the stirring motor is rotatably connected to the drying box, the upper air duct and the lower air duct through a sealed bearing.

[0010] Preferably, a feed port is provided on the upper surface of the drying box, a feed slot is provided on the upper air duct at a position corresponding to the feed port, a top cover is installed on the feed port, and a sealing rubber ring is provided on the top cover.

[0011] Preferably, a discharge port is provided at the bottom of the front side of the drying box, a storage bin is provided in the discharge port, a discharge trough is provided at a position corresponding to the storage bin in the downwind duct, the storage bin is slidably connected to the drying box through the discharge port, and a sealing rubber ring is provided on the storage bin.

[0012] Preferably, a PLC controller is installed on the side of the drying box, and the output end of the PLC controller is electrically connected to the input ends of the hot air blower, the air guide fan, the solenoid valve and the dehumidification fan.

[0013] Compared with the prior art, the present invention has the following beneficial effects: First, the present invention promotes the flow of hot air in the drying box and accelerates the drying speed by setting up upper and lower air ducts, and setting air guide fans in the upper and lower air ducts. The drying box is equipped with a temperature sensor and a humidity sensor, which can monitor the temperature and humidity in the drying box in real time and provide data support for accurate control of the drying process. The PLC controller can automatically adjust the operating status of equipment such as the hot air blower, air guide fan, solenoid valve and dehumidification fan according to the feedback signals of the temperature sensor and the humidity sensor to ensure that the drying process is carried out under the optimal temperature and humidity conditions.

[0014] Secondly, the present invention realizes the recycling of hot air and reduces energy consumption by cooperating with the hot air blower, drying box, return pipe, dehumidification box and return box. The air inlet end of the hot air blower is connected to the return box, and the return box is connected to the dehumidification box through the air inlet pipe. The hot air dehumidified by the dehumidification box returns to the hot air blower for heating and enters the drying box again, forming an efficient circulation drying system.

[0015] Thirdly, the stirring propeller provided in the present invention has a specially constructed shaftless spiral stirring blade which can make the battery raw materials move axially for drying and fully turn them over during the drying process, thereby increasing the contact area with the hot air and improving the drying efficiency.

[0016] Fourthly, the molecular sieve in the dehumidification box of the present invention can effectively absorb moisture in the hot air, ensuring that the hot air entering the drying box always remains dry. The dry hot air is conducive to the rapid drying of the battery raw materials, avoiding the influence of the drying effect due to excessive moisture content in the air, thereby ensuring that the battery raw materials after drying have high quality.

[0017] Fourthly, the present invention is provided The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the overall structure of the present invention; Figure 3 It is a front cross-sectional view of a drying box of the present invention; Figure 4 It is an overall side view of the present invention; Figure 5 It is a schematic diagram of the structure of the stirring propeller of the present invention; Figure 6 is a side cross-sectional view of the dehumidification box of the present invention; Figure 7 It is a schematic diagram of the mesh plate structure of the present invention; Figure 8 It is a schematic diagram of the top cover structure of the present invention.

[0019] Description of the drawings: 1. Drying box; 101. Partition; 102. Upper air duct; 103. Lower air duct; 104. Feed port; 105. Air guide fan; 106. Temperature sensor; 107. Humidity sensor; 108. Mesh plate; 109. Feed port; 110. Feed chute; 111. Top cover; 112. Sealing rubber ring; 113. Discharge port; 114. Storage bin; 115. Discharge chute; 116. PLC controller; 2. Hot air blower; 201. Hot air duct; 202. Reflux box; 203. Exhaust pipe; 204. Inlet pipe; 205. Solenoid valve; 3. Dehumidification box; 301. Reflux pipe; 302. Dehumidification fan; 303. Molecular sieve; 4. Stirring propeller; 401. Stirring motor; 402. Spiral stirring blade. DETAILED DESCRIPTION

[0020] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive. Example

[0021] Please refer to the attached Figure 1 , 2 As shown in Figures 3 and 4, a battery raw material circulation drying device comprises a drying box 1, a hot air blower 2 is arranged outside the drying box 1, a dehumidification box 3 is arranged between the drying box 1 and the hot air blower 2, the drying box 1 is connected to the hot air blower 2 through a hot air pipe 201, the drying box 1 is connected to the dehumidification box 3 through a return pipe 301, a partition 101 is arranged inside the drying box 1, an upper air duct 102 and a lower air duct 103 are arranged inside the drying box 1, the upper air duct 102 and the lower air duct 103 are located on the upper and lower sides of the partition 101 and are provided with corresponding material passing ports 104, a stirring propeller 4 is arranged inside the upper air duct 102 and the lower air duct 103, an air guide fan 105 is arranged on the left side of the upper air duct 102, and an air guide fan 105 is arranged on the right side of the lower air duct 103, and a temperature sensor 106 and a humidity sensor 107 are also arranged inside the drying box 1.

[0022] It should be noted that a feed port 109 is provided on the upper surface of the drying box 1, a feed trough 110 is provided at a position corresponding to the feed port 109 on the upper air duct 102, a top cover 111 is installed on the feed port 109, and a sealing rubber ring 112 is provided on the top cover 111. A discharge port 113 is provided at the bottom of the front of the drying box 1, a storage bin 114 is provided in the discharge port 113, a discharge trough 115 is provided at a position corresponding to the storage bin 114 on the lower air duct 103, the storage bin 114 is slidably connected to the drying box 1 through the discharge port 113, and a sealing rubber ring 112 is provided on the storage bin 114. The top cover 111 and the storage bin 114 are both provided with a sealing rubber ring 112, which can effectively prevent hot air leakage, ensure the sealing of the drying box 1 during operation, prevent external impurities from entering the drying box 1 through the feed port 109 and the discharge port 113, and affect the quality of battery raw materials, thereby improving energy efficiency and operational safety.

[0023] It should be noted that air guide fans 105 are provided on both sides of the upper air duct 102 and the lower air duct 103 to promote the flow of hot air in the drying box 1 and further accelerate the drying speed. A temperature sensor 106 and a humidity sensor 107 are provided in the drying box 1 to monitor the temperature and humidity in the drying box 1 in real time, and provide data support for accurately controlling the drying process. The monitored data is transmitted to a PLC controller provided on the side of the drying box 1.

[0024] Please refer to the attached Figure 2As shown, the air outlet end of the hot air blower 2 is connected to a hot air pipe 201, a return box 202 is installed on the outside of the air inlet end of the hot air blower 2, an air outlet pipe 203 is provided on one side of the return box 202, and an air inlet pipe 204 is provided on the other side of the return box 202, solenoid valves 205 are provided on both the air outlet pipe 203 and the air inlet pipe 204, the air inlet pipe 204 is connected to a dehumidification box 3, a dehumidification fan 302 is provided in the dehumidification box 3, a molecular sieve 303 is also provided in the dehumidification box 3, a return pipe 301 is connected to the surface of one side of the dehumidification box 3, and the surface of the other side of the dehumidification box 3 is connected to the return box 202 through the air inlet pipe 204.

[0025] It should be noted that the hot air duct 201 and the return duct 301 are both provided with a mesh plate 108 at one end of the drying box 1. The surface of the mesh plate 108 has dense openings, and the hole diameter is smaller than the minimum particle size of the battery raw materials, which can prevent the battery raw materials from entering the pipeline, avoid clogging the pipeline and affecting the normal operation of the equipment, and ensure the stable operation of the device and the reliability of long-term use.

[0026] It should be noted that the air inlet end of the hot air blower 2 is connected to the return box 202, and the return box 202 is connected to the dehumidification box 3 through the air inlet pipe 204. The hot air dehumidified by the dehumidification box 3 returns to the hot air blower 2 for heating and enters the drying box again, forming an efficient circulation drying system. The connection between the hot air blower 2, the return box 202, the dehumidification box 3 and the drying box 1 forms a circulation loop, realizing the recycling of hot air, greatly improving energy utilization and reducing drying costs.

[0027] It should be noted that the dehumidification fan 302 in the dehumidification box 3 can guide the hot air containing water vapor in the drying box 1 to enter the dehumidification box 3 through the return pipe 301, and the molecular sieve 303 in the dehumidification box 3 can effectively absorb the moisture in the hot air returning from the return pipe 301, and then transport the dry hot air to the return box 202, and be reheated by the hot air blower 2 to ensure that the hot air entering the drying box 1 always remains dry. The dry hot air is conducive to the rapid drying of the battery raw materials, avoiding the influence of the drying effect due to the excessive moisture content in the air, thereby ensuring that the battery raw materials after drying have high quality.

[0028] It should be noted that the PLC controller 116 can automatically adjust the operating status of the hot air blower 2, the air guide fan 105, the solenoid valve 205 and the dehumidification fan 302 according to the feedback signals of the temperature sensor 106 and the humidity sensor 107 to ensure that the drying process is carried out under the optimal temperature and humidity conditions. At the same time, the operator can also easily adjust the temperature and time required for the drying process according to actual needs, which improves the convenience of operation, reduces human operating errors, and improves the stability and reliability of production.

[0029] It should be noted that after drying is completed, the solenoid valve 205 on the air outlet pipe 203 is closed through the PLC controller 116, the solenoid valve 205 on the air inlet pipe 204 is opened, and the hot air blower 2 is started to blow dry hot air through the molecular sieve 303. The flow of dry hot air can take away the moisture released by the molecular sieve 303, so that the molecular sieve 303 is reactivated.

[0030] Please refer to the attached Figure 4 , 6 As shown in Figures 7 and 8, the stirring propeller 4 includes a stirring motor 401, the output end of which is connected to a spiral stirring blade 402, and the output end of the stirring motor 401 is rotatably connected to the drying box 1, the upper air duct 102 and the lower air duct 103 through a sealed bearing.

[0031] It should be noted that the spiral stirring blade 402 is a special shaftless spiral structure, which can push the battery material to move axially while turning the battery material.

[0032] It should be noted that the stirring propeller 4 provided in the air duct can fully turn the battery raw materials during the drying process, increase the contact area with the hot air, and improve the drying efficiency.

[0033] The specific operation process of the present invention is as follows: Turn on the power, open the top cover 111 of the feed port 109 on the upper surface of the drying box 1, pour the battery raw materials to be dried into the drying box 1, and the battery raw materials enter the upper air duct 102 through the feed slot 110. After the feeding is completed, close the top cover 111, set the drying temperature and time and other parameters through the PLC controller 116, start the hot air blower 2, and the hot air blower 2 starts to work and generates hot air. The hot air enters the drying box 1 through the hot air pipe 201, and the air guide fan 105 on the right side of the upper air duct 102 guides the hot air into the air duct. Start the stirring propeller 4, and the output end of the stirring motor 401 drives the spiral stirring blade 402 to start rotating. The stirring propeller 4 in the upper air duct 102 stirs the battery raw materials and pushes the raw materials to move toward the feeding port 104. The raw materials fall into the lower air duct 103 through the feeding port 104. The air guide fan 105 on the left side of the lower air duct 103 guides the hot air into the air duct. The stirring propeller 4 in the lower air duct 103 is connected to the electric The pool raw materials are stirred and pushed to move to the storage bin 114. The hot air containing water vapor in the drying box 1 is guided by the dehumidification fan 302, and enters the dehumidification box 3 through the reflux pipe 301. The water vapor is adsorbed by the molecular sieve 303, and the dry hot air enters the reflux box 202 through the air inlet pipe 204, enters the hot air blower 2 from the air inlet end of the hot air blower 2 for secondary heating, and then enters the drying box 1 to continue hot air drying. After the drying is completed, the storage bin 114 is pulled out from the discharge port 113 to take out the dried battery raw materials.

[0034] The above is an exemplary description of the present invention in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A battery raw material circulation drying device, characterized in that , comprising a drying box (1), a hot air blower (2) is provided outside the drying box (1), and a dehumidification box (3) is provided between the drying box (1) and the hot air blower (2); The drying box (1) is connected to the hot air blower (2) via a hot air pipe (201), and the drying box (1) is connected to the dehumidification box (3) via a return pipe (301). A partition (101) is provided in the drying box (1), and an upper air duct (102) and a lower air duct (103) are provided in the drying box (1). The upper air duct (102) and the lower air duct (103) are located on the upper and lower sides of the partition (101) and are provided with corresponding material passing ports (104). A stirring propeller (4) is provided in both the upper air duct (102) and the lower air duct (103). An air guide fan (105) is provided on the left side of the upper air duct (102), and an air guide fan (105) is provided on the right side of the lower air duct (103). A temperature sensor (106) and a humidity sensor (107) are also provided in the drying box (1).

2. A battery raw material circulation drying device according to claim 1, characterized in that: The air outlet end of the hot air blower (2) is connected to the hot air pipe (201), a return box (202) is installed on the outside of the air inlet end of the hot air blower (2), an air outlet pipe (203) is provided on one side of the return box (202), an air inlet pipe (204) is provided on the other side of the return box (202), solenoid valves (205) are provided on both the air outlet pipe (203) and the air inlet pipe (204), and the air inlet pipe (204) is connected to the dehumidification box (3).

3. A battery raw material circulation drying device according to claim 2, characterized in that: A dehumidification fan (302) is provided in the dehumidification box (3), and a molecular sieve (303) is also provided in the dehumidification box (3). The surface of one side of the dehumidification box (3) is connected to the return pipe (301), and the surface of the other side of the dehumidification box (3) is connected to the return box (202) via the air inlet pipe (204).

4. A battery raw material circulation drying device according to claim 1, characterized in that: The hot air pipe (201) and the return pipe (301) are both provided with a mesh plate (108) at one end of the drying box (1); the mesh plate (108) has densely opened holes on its surface, and the hole diameter is smaller than the minimum particle size of the battery raw material.

5. The battery raw material circulation drying device according to claim 1, characterized in that: The stirring propeller (4) comprises a stirring motor (401), the output end of the stirring motor (401) is connected to a spiral stirring blade (402), and the output end of the stirring motor (401) is rotationally connected to the drying box (1) via a sealed bearing.

6. The battery raw material circulation drying device according to claim 1, characterized in that: The upper surface of the drying box (1) is provided with a feed port (109), the upper air duct (102) is provided with a feed slot (110) at a position corresponding to the feed port (109), a top cover (111) is installed on the feed port (109), and a sealing rubber ring (112) is provided on the top cover (111).

7. The battery raw material circulation drying device according to claim 1, characterized in that: The drying box (1) is provided with a discharge port (113) at the bottom of the front side, a storage bin (114) is provided in the discharge port (113), a discharge trough (115) is provided at a position corresponding to the storage bin (114) in the downwind duct (103), the storage bin (114) is slidably connected to the drying box (1) via the discharge port (113), and a sealing rubber ring (112) is provided on the storage bin (114).

8. The battery raw material circulation drying device according to claim 1, characterized in that: A PLC controller (116) is installed on the side of the drying box (1), and an output end of the PLC controller (116) is electrically connected to input ends of the hot air blower (2), the air guide fan (105), the solenoid valve (205) and the dehumidification fan (302).

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