A gas circulation type secondary lithium battery drying equipment

Abstract

The utility model discloses a gas circulation type secondary lithium battery drying equipment, which relates to the field of drying of lithium battery substrates, including a drying box with a built-in infrared drying device, the infrared drying device is installed on both sides of the inner wall of the drying box, and a circulating air duct mechanism is installed inside the drying box and outside the drying box, and a rotating fan blade mechanism is installed inside the two output ends of the circulating air duct mechanism; the rotating fan blade mechanism is used to provide power for the movement of hot air, and the hot air that obtains kinetic energy circulates along the circulating air duct mechanism; the circulating hot air is used to dry the slurry coated on both sides of the substrate. The utility model can reciprocate the air in the drying box by setting a rotating fan blade mechanism and a circulating air duct mechanism, and the reciprocating hot air acts on the upper surface and the lower surface of the substrate, thereby playing an auxiliary drying effect, thereby achieving the purpose of energy-saving drying.

Description

Technical Field

[0001] The utility model relates to the field of drying lithium battery substrates, in particular to gas circulation type secondary lithium battery drying equipment. Background Art

[0002] As a secondary battery (i.e., it can be recharged and reused), the lithium battery needs to be coated with positive and negative electrode slurries on the substrate during production, and then the slurry is dried using drying equipment.

[0003] In the prior art, an infrared drying device is installed inside a drying box for drying substrates. The water vapor generated during the drying process needs to be discharged, and the discharge of water vapor will cause the temperature in the drying box to be at a lower level, which means that the drying box must be longer and the energy consumption during the drying process is higher. Utility Model Content

[0004] The purpose of the utility model is to provide a gas circulation type secondary lithium battery drying device in order to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas circulation type secondary lithium battery drying device, comprising a drying box with a built-in infrared drying device, the infrared drying device is installed on both sides of the inner wall of the drying box, a circulating air duct mechanism is installed inside and outside the drying box, and a rotating fan blade mechanism is installed inside two output ends of the circulating air duct mechanism;

[0006] The rotating fan blade mechanism is used to provide power for the movement of hot air, and the hot air that obtains kinetic energy circulates along the circulating air duct mechanism;

[0007] The circulating hot air is used to dry the slurry coated on both sides of the substrate.

[0008] As a further solution of the utility model: the circulating air duct mechanism includes an upper air duct and a lower air duct which are symmetrically installed in the upper and lower parts, and one end of the upper air duct and the lower air duct which are close to each other penetrates into the inner cavity of the drying box.

[0009] As a further solution of the utility model: the circulating air duct mechanism also includes a side air duct No. 1 and a side air duct No. 2 which are symmetrically installed on the left and right, and the side air duct No. 1 and the side air duct No. 2 are in a "C" shape structure, and the two ends of the side air duct No. 1 and the side air duct No. 2 are respectively connected to the inner cavities of the upper air duct and the lower air duct.

[0010] As a further solution of the utility model: the circulating air duct mechanism also includes two outer baffles installed along the vertical central axis of the drying box, the outer baffles divide the inner cavity of the drying box into left and right parts, and the ends of the two outer baffles close to each other do not contact each other, leaving a gap for the substrate to move;

[0011] The outer partition plate located at the top has a horizontal plate integrally formed on one end face close to the No. 1 side air duct, and the outer partition plate located at the bottom has a horizontal plate integrally formed on one end face close to the No. 2 side air duct, and the two outer partition plates have an inner partition plate integrally formed on one end face away from each other for dividing the inner cavity of the upper air duct and the lower air duct into left and right parts.

[0012] As a further solution of the utility model: the rotating fan blade mechanism includes a connecting plate installed at the air outlet port of the upper air duct and the air outlet port of the lower air duct, and a plurality of circular grooves for the fan blades to rotate are evenly spaced inside the connecting plate, one end of the fan blade is fixedly connected to a rotating shaft, and the end of the rotating shaft away from the fan blade is rotatably connected to the inner wall of the upper air duct or the lower air duct;

[0013] The outer walls of the multiple rotating shafts located in the same direction are interference-fitted with synchronous wheels, and the multiple synchronous wheels located at the same height are connected by a synchronous belt transmission. A pressure wheel is provided on the outer wall of the synchronous belt and between two adjacent synchronous wheels. The end of the pressure wheel away from the fan blade is rotatably connected to a fixed rod, and the end of the fixed rod away from the pressure wheel is fixedly connected to the inner wall of the upper air duct or the lower air duct.

[0014] As a further solution of the utility model: a passive bevel gear is interference fitted on the outer wall of the rotating shaft, an active bevel gear is meshed on the outer periphery of the passive bevel gear, a driving motor is installed on the outer walls of the No. 1 side air duct and the No. 2 side air duct, and an output end of the driving motor is connected to the active bevel gear.

[0015] As a further solution of the utility model: side baffles are fixedly installed on both sides of the inner cavity of the drying box, there is a gap for gas circulation between the side baffles and the first horizontal plate and the second horizontal plate, and the inner sides of the two side baffles are close to the substrate.

[0016] As a further solution of the utility model: plug-in grooves are provided on the outer sides of the No. 1 side air duct and the No. 2 side air duct, and plug-in plates are plugged into the inner walls of the plug-in grooves, one end of the plug-in plate is fixedly connected to a storage box inserted into the No. 1 side air duct and the No. 2 side air duct, and a handle is fixedly connected to the end of the plug-in plate away from the storage box, and a rotating plate for limiting the plug-in plate is rotatably installed on the outer sides of the No. 1 side air duct and the No. 2 side air duct, and the top of the storage box is an open structure.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. By setting up a rotating fan blade mechanism and a circulating air duct mechanism, the air in the drying box can be circulated back and forth. The reciprocating hot air acts on the upper and lower surfaces of the substrate, thereby playing an auxiliary drying effect, thereby achieving the purpose of energy-saving drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0021] Figure 3 For the utility model Figure 2 A partial enlarged view of the middle part;

[0022] Figure 4 This is a schematic diagram of the installation of the storage box of the utility model.

[0023] In the figure: 1. drying box; 2. upper air duct; 3. lower air duct; 4. side air duct No. 1; 5. side air duct No. 2; 6. driving motor; 7. outer partition; 8. inner partition; 9. horizontal plate No. 1; 10. horizontal plate No. 2; 11. side baffle; 12. active bevel gear; 13. passive bevel gear; 14. rotating shaft; 15. fan blade; 16. connecting plate; 17. synchronous wheel; 18. synchronous belt; 19. fixing rod; 20. pressure wheel; 21. rotating plate; 22. plug-in slot; 23. storage box; 24. plug-in plate; 25. handle. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 to Figure 4In an embodiment of the utility model, a gas circulation type secondary lithium battery drying device comprises a drying box 1 with a built-in infrared drying device, the infrared drying device is installed on both sides of the inner wall of the drying box 1, a circulating air duct mechanism is installed inside and outside the drying box 1, and a rotating fan blade mechanism is installed inside the two output ends of the circulating air duct mechanism; the rotating fan blade mechanism is used to provide power for the movement of hot air, and the hot air that obtains kinetic energy circulates along the circulating air duct mechanism; the circulating hot air is used to dry the slurry coated on both sides of the substrate.

[0026] In this embodiment: when drying the substrate coated with the positive and negative electrode slurries, the rolled substrate passes through the drying box 1, and the infrared drying device is started during this process (when infrared rays irradiate the surface of an object, the object absorbs and converts the infrared energy into heat energy, thereby increasing the temperature of the object. As the temperature of the object increases, the moisture inside the object begins to evaporate and is released into the surrounding air in the form of water vapor);

[0027] At this time, the rotating fan blade mechanism is started, and the rotating fan blade mechanism runs to provide kinetic energy to the air and the water vapor dispersed in the air, and the air and water vapor circulate along the circulating air duct mechanism (such as: Figure 2 As shown by the arrow, during the flow of air and water vapor, heat is exchanged between the air and water vapor, the water vapor temperature decreases, and the air temperature increases. The water vapor is filtered during the flow, and the air with increased temperature acts on the top and bottom of the substrate during the circulation process, thereby auxiliary drying of the substrate.

[0028] Please refer to Figure 2 The circulating air duct mechanism includes an upper air duct 2 and a lower air duct 3 which are symmetrically installed in the upper and lower parts, and one end of the upper air duct 2 and the lower air duct 3 which are close to each other penetrates into the inner cavity of the drying box 1. The circulating air duct mechanism also includes a No. 1 side air duct 4 and a No. 2 side air duct 5 which are symmetrically installed in the left and right parts, and the No. 1 side air duct 4 and the No. 2 side air duct 5 are in a "C"-shaped structure, and the two ends of the No. 1 side air duct 4 and the No. 2 side air duct 5 are respectively connected to the inner cavities of the upper air duct 2 and the lower air duct 3. The circulating air duct mechanism also includes two outer partitions 7 which are installed along the vertical central axis of the drying box 1, and the outer partitions 7 divide the inner cavity of the drying box 1 into two left and right parts, and the two outer partitions 7 are close to each other. One end of the outer partition plate 7 located at the top is not in contact with each other, leaving a gap for the movement of the substrate; a horizontal plate No. 1 is integrally formed with an outer partition plate 7 located at the top, which is close to the end face of the No. 1 side air duct 4; a horizontal plate No. 2 is integrally formed with an outer partition plate 7 located at the bottom, which is close to the end face of the No. 2 side air duct 5; and the two outer partition plates 7 are integrally formed with an inner partition plate 8 that separates the inner cavity of the upper air duct 2 and the lower air duct 3 into two left and right parts on their end faces that are away from each other; side baffles 11 are fixedly installed on both sides of the inner cavity of the drying box 1; there is a gap for gas circulation between the side baffles 11 and the horizontal plates No. 1 9 and No. 2 10; the inner sides of the two side baffles 11 are close to the substrate.

[0029] In this embodiment: during the drying process, the rotating fan blade mechanism operates to provide kinetic energy for movement of air and water vapor. The air moves outward from the output ports of the upper air duct 2 and the lower air duct 3, acting on the upper surface and half of the lower surface of the substrate. Then the gas moves along the gap between the No. 1 horizontal plate 9 and the upper surface of the substrate and the gap between the No. 2 horizontal plate 10 and the lower surface of the substrate. During the movement, heat acts on the upper and lower surfaces of the substrate. Then the started air passes through the gap between the No. 1 horizontal plate 9 and the side baffle 11 and the gap between the No. 2 horizontal plate 10 and the other side baffle 11, and enters the upper air duct 2 and the lower air duct 3 from the input ports of the upper air duct 2 and the lower air duct 3 for circulation.

[0030] Please refer to Figure 2 and Figure 3 The rotating fan blade mechanism includes a connecting plate 16 installed at the air outlet port of the upper air duct 2 and the air outlet port of the lower air duct 3. A plurality of circular grooves for the fan blades 15 to rotate are equidistantly provided inside the connecting plate 16. One end of the fan blade 15 is fixedly connected to a rotating shaft 14. The end of the rotating shaft 14 away from the fan blade 15 is rotatably connected to the inner wall of the upper air duct 2 or the lower air duct 3. The outer walls of the plurality of rotating shafts 14 located in the same direction are interference-fitted with synchronous wheels 17. The plurality of synchronous wheels 17 located at the same height are connected through a synchronous belt 18 for transmission. The synchronous belt 18 is connected to the rotating shaft 14. A pressure wheel 20 is arranged on the outer wall of 8 and between two adjacent synchronous wheels 17, and the end of the pressure wheel 20 away from the fan blade 15 is rotatably connected to the fixing rod 19, and the end of the fixing rod 19 away from the pressure wheel 20 is fixedly connected to the inner wall of the upper air duct 2 or the lower air duct 3, and a passive bevel gear 13 is interference fitted on the outer wall of a rotating shaft 14, and the outer periphery of the passive bevel gear 13 is meshed with an active bevel gear 12, and the outer walls of the No. 1 side air duct 4 and the No. 2 side air duct 5 are both installed with a driving motor 6, and the output end of the driving motor 6 is connected to the active bevel gear 12.

[0031] In this embodiment: by starting the driving motor 6, the driving motor 6 drives the active bevel gear 12 to rotate, the active bevel gear 12 drives the passive bevel gear 13 to rotate, the passive bevel gear 13 drives the rotating shaft 14 connected thereto to rotate, the rotating shaft 14 drives other multiple rotating shafts 14 to rotate synchronously through multiple synchronous wheels 17 and synchronous belts 18, and the multiple rotating shafts 14 synchronously drive the fan blades 15 connected thereto to rotate, thereby giving kinetic energy to the hot air and water vapor;

[0032] It should be noted that the pressure wheel 20 is provided to meet the transmission wrap angle between the synchronous belt 18 and the synchronous wheel 17 to avoid slipping during the transmission process.

[0033] Please refer to Figure 4, the outer sides of the No. 1 side air duct 4 and the No. 2 side air duct 5 are provided with plug-in slots 22, the inner walls of the plug-in slots 22 are plugged with plug-in boards 24, one end of the plug-in board 24 is fixedly connected to a storage box 23 inserted into the No. 1 side air duct 4 and the No. 2 side air duct 5, and the end of the plug-in board 24 away from the storage box 23 is fixedly connected to a handle 25, and the outer sides of the No. 1 side air duct 4 and the No. 2 side air duct 5 are rotatably installed with rotating plates 21 for limiting the plug-in boards 24, and the top of the storage box 23 is an open structure.

[0034] In this embodiment, during the circulation of hot air carrying water vapor, the hot air contacts the desiccant placed in the storage box 23, and the desiccant absorbs the water vapor, while the air continues to circulate, so as to prevent the water vapor from always accompanying the circulation. When the desiccant needs to be replaced, the rotating plate 21 is first pushed from the vertical state to the horizontal state, and the rotating plate 21 no longer blocks the plug-in plate 24, so the handle 25 can be pulled to take out the storage box 23, and after taking it out, the desiccant can be poured out and a new desiccant can be loaded.

[0035] Then insert the storage box 23 into the No. 1 side air duct 4 and the No. 2 side air duct 5 until the storage box 23 is completely pushed in and cannot be moved. At this time, the plug-in board 24 is flush with the outer sides of the No. 1 side air duct 4 and the No. 2 side air duct 5. Since a sealing ring is installed on the outer periphery of the plug-in board 24, when the plug-in board 24 is inserted, the sealing ring seals the contact position between the plug-in slot 22 and the plug-in board 24, thereby improving the sealing performance.

[0036] Finally, the rotating plate 21 in the horizontal state is rotated to the vertical state to limit the plug-in plate 24 .

[0037] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gas circulation type secondary lithium battery drying device, comprising a drying box (1) with a built-in infrared drying device, wherein the infrared drying device is installed on both sides of the inner wall of the drying box (1), characterized in that: A circulating air duct mechanism is installed inside the drying box (1) and outside the drying box (1), and a rotating fan blade mechanism is installed inside two output ends of the circulating air duct mechanism; The rotating fan blade mechanism is used to provide power for the movement of hot air, and the hot air that obtains kinetic energy circulates along the circulating air duct mechanism; The circulating hot air is used to dry the slurry coated on both sides of the substrate.

2. The gas circulation type secondary lithium battery drying equipment according to claim 1, characterized in that: The circulating air duct mechanism comprises an upper air duct (2) and a lower air duct (3) which are symmetrically installed in the upper and lower directions, and the ends of the upper air duct (2) and the lower air duct (3) which are close to each other penetrate into the inner cavity of the drying box (1).

3. A gas circulation type secondary lithium battery drying equipment according to claim 2, characterized in that: The circulating air duct mechanism further comprises a side air duct No. 1 (4) and a side air duct No. 2 (5) which are symmetrically installed on the left and right, wherein the side air duct No. 1 (4) and the side air duct No. 2 (5) are in a "C"-shaped structure, and the two ends of the side air duct No. 1 (4) and the side air duct No. 2 (5) are respectively connected to the inner cavities of the upper air duct (2) and the lower air duct (3).

4. The gas circulation type secondary lithium battery drying equipment according to claim 3, characterized in that: The circulating air duct mechanism further comprises two outer baffles (7) installed along the vertical central axis of the drying box (1), wherein the outer baffles (7) divide the inner cavity of the drying box (1) into two left and right parts, and the ends of the two outer baffles (7) close to each other do not contact each other, leaving a gap for the substrate to move; The outer baffle plate (7) located at the top is integrally formed with a first horizontal plate (9) at one end face close to the first side air duct (4), and the outer baffle plate (7) located at the bottom is integrally formed with a second horizontal plate (10) at one end face close to the second side air duct (5), and the two outer baffle plates (7) are integrally formed with an inner baffle plate (8) at one end face away from each other for dividing the inner cavity of the upper air duct (2) and the lower air duct (3) into two left and right parts.

5. The gas circulation type secondary lithium battery drying equipment according to claim 2, characterized in that: The rotating fan blade mechanism comprises a connecting plate (16) installed at the air outlet port of the upper air duct (2) and the air outlet port of the lower air duct (3), a plurality of circular grooves for the fan blade (15) to rotate are equidistantly provided inside the connecting plate (16), one end of the fan blade (15) is fixedly connected to a rotating shaft (14), and an end of the rotating shaft (14) away from the fan blade (15) is rotatably connected to the inner wall of the upper air duct (2) or the lower air duct (3); The outer walls of the plurality of rotating shafts (14) located in the same direction are interference-fitted with synchronous wheels (17), and the plurality of synchronous wheels (17) located at the same height are connected through a synchronous belt (18). A pressure wheel (20) is provided on the outer wall of the synchronous belt (18) and between two adjacent synchronous wheels (17). The end of the pressure wheel (20) away from the fan blades (15) is rotatably connected to a fixing rod (19), and the end of the fixing rod (19) away from the pressure wheel (20) is fixedly connected to the inner wall of the upper air duct (2) or the lower air duct (3).

6. The gas circulation type secondary lithium battery drying equipment according to claim 5, characterized in that: A passive bevel gear (13) is interference-fitted on the outer wall of one of the rotating shafts (14), and a driving bevel gear (12) is meshed on the outer periphery of the passive bevel gear (13). A driving motor (6) is installed on the outer walls of the No. 1 side air duct (4) and the No. 2 side air duct (5), and an output end of the driving motor (6) is connected to the driving bevel gear (12).

7. The gas circulation type secondary lithium battery drying equipment according to claim 1, characterized in that: Side baffles (11) are fixedly installed on both sides of the inner cavity of the drying box (1), and there is a gap for gas circulation between the side baffles (11) and the first horizontal plate (9) and the second horizontal plate (10), and the inner sides of the two side baffles (11) are close to the substrate.

8. The gas circulation type secondary lithium battery drying equipment according to claim 6, characterized in that: The outer sides of the No. 1 side air duct (4) and the No. 2 side air duct (5) are both provided with a plug-in slot (22), the inner wall of the plug-in slot (22) is plugged with a plug-in board (24), one end of the plug-in board (24) is fixedly connected with a storage box (23) inserted into the No. 1 side air duct (4) and the No. 2 side air duct (5), one end of the plug-in board (24) away from the storage box (23) is fixedly connected with a handle (25), the outer sides of the No. 1 side air duct (4) and the No. 2 side air duct (5) are both rotatably installed with a rotating plate (21) for limiting the plug-in board (24), and the top of the storage box (23) is an open structure.

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