Drying device for lithium battery

Abstract

The drying device for the lithium battery comprises a first box body, a second box body, a vacuum device, a drying agent plate, a heating device, an airflow device, a telescopic assembly, a rotating assembly and a monitoring assembly, the first box body is fixedly arranged at the top of the second box body, and the rotating assembly is fixedly arranged in the second box body; the telescopic assembly is fixedly arranged on the top of the rotating assembly, the vacuum device is fixedly arranged on the right side of the first box body, the airflow device is fixedly arranged on the left side of the first box body, the drying agent plate is fixedly arranged on the top of the telescopic assembly and located in the first box body, and the heating devices are fixedly arranged on the two side walls in the first box body. The monitoring assembly is fixedly arranged on the first box body. The utility model relates to the technical field of lithium battery production, in particular to a drying device for a lithium battery, which is provided with a drying agent plate, a rotating component, a telescopic component and an airflow device, improves the production efficiency of the lithium battery, reduces the energy consumption and has an over-temperature protection function.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a drying device for lithium batteries. Background Technique

[0002] Lithium batteries are a type of battery with lithium metal or lithium alloy as the negative electrode material and using a non-aqueous electrolyte solution. Due to the very active chemical properties of lithium metal, the processing, storage, and use of lithium metal have very high environmental requirements. Therefore, lithium batteries have not been applied for a long time. With the development of science and technology, lithium batteries have now become the mainstream. Since the electrolyte of lithium batteries is an organic substance without water molecules, the presence of water is extremely harmful to lithium batteries and will cause lithium batteries to heat up and explode. Therefore, before lithium battery injection and sealing, it must go through vacuum baking, the purpose of which is to remove water. In a vacuum environment, the boiling point of water decreases significantly under negative pressure, which is conducive to water removal and does not affect the quality of the lithium battery itself.

[0003] When the traditional drying device dries the lithium battery, it heats the lithium battery in a vacuum environment to quickly evaporate the moisture inside and then evacuates it, so as to achieve the purpose of drying the lithium battery. However, the traditional drying device heats the lithium battery by thermal radiation in a vacuum environment. The lithium battery has a slow heating rate and uneven heating. The temperature difference between lithium batteries at different positions is very large. Since the heating time and baking time of the lithium battery are both very long, the energy consumption is also large, seriously affecting the drying efficiency of the lithium battery. Content of the Utility Model

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a drying device for lithium batteries with high efficiency and low energy consumption.

[0005] The technical solution adopted by the utility model is as follows: A drying device for lithium batteries of the utility model includes a first box body, a second box body, a vacuum device, a desiccant box, a heating device, an air flow device, a telescopic assembly, a rotating assembly, and a monitoring assembly. The first box body is fixedly arranged on the top of the second box body. The rotating assembly is fixedly arranged inside the second box body. The telescopic assembly is fixedly arranged on the top of the rotating assembly. The vacuum device is fixedly arranged on the right side of the first box body. The air flow device is fixedly arranged on the left side of the first box body. The desiccant box is fixedly arranged on the top of the telescopic assembly and is located inside the first box body. The heating device is fixedly arranged on the two inner side walls of the first box body. The monitoring assembly is fixedly arranged on the first box body.

[0006] Further, the rotating assembly includes a motor, a support platform, a first gear, and a second gear. The support platform is fixedly arranged on the inner bottom wall of the second box body. A limiting ring is sleeved at the lower end of the support platform. The second gear is rotatably arranged on the support platform. The bottom surface of the second gear is attached to the top surface of the limiting ring. The first gear is fixedly arranged on the output shaft of the motor. The first gear is meshed and connected with the second gear.

[0007] Further, the telescopic assembly includes an electric telescopic rod and a support telescopic rod. A through hole is formed at the bottom of the first box body. A circular plate is rotatably provided in the through hole. The electric telescopic rod penetrates through the circular plate and is fixedly provided at the top of the support table. The top of the output shaft of the electric telescopic rod is rotatably connected to the bottom of the desiccant box. The support telescopic rod penetrates through the circular plate and is fixedly provided between the top of the second gear and the bottom of the desiccant box. The support telescopic rod is located on both sides of the electric telescopic rod.

[0008] Further, on both inner side walls of the first box body, there are fixedly provided support plates. A support board is slidably provided on the support plates. A plurality of through holes are evenly formed on the support board. A plurality of partition boards are fixedly provided on the support board. The partition boards divide the support board to form a plurality of grooves. The lithium battery is arranged in the grooves. A box door is hinged to the front of the left side of the first box body. A handle is fixedly provided on the side surface of the box door.

[0009] Further, the vacuum device includes a first vacuum pump and a first exhaust pipe. One end of the first exhaust pipe is communicated with the air inlet of the first vacuum pump, and the other end thereof is communicated with the inside of the first box body.

[0010] Further, the air flow device includes an air box, a blower, a second vacuum pump, a dryer, an air inlet pipe and a second exhaust pipe. One end of the air inlet pipe is communicated with the inside of the first box body, and the other end thereof is communicated with the exhaust port of the blower. The air inlet of the blower is communicated with the inside of the air box. The gas inside the air box is nitrogen or inert gas. One end of the second exhaust pipe is communicated with the inside of the first box body and the other end is communicated with the air inlet of the second vacuum pump. The exhaust port of the second vacuum pump is communicated with the air inlet of the dryer. The exhaust port of the dryer is communicated with the inside of the air box. An intake valve is connected in series on the air inlet pipe. An air extraction valve is connected in series on the second exhaust pipe.

[0011] Further, the monitoring assembly includes a control panel, a temperature sensor, a humidity sensor, a vacuum degree sensor and an alarm lamp. The temperature sensor, the humidity sensor and the vacuum degree sensor are fixedly provided on the rear inner wall of the first box body. The control panel and the alarm lamp are fixedly provided on the top of the first box body. The first vacuum pump, the blower, the second vacuum pump, the dryer, the electric telescopic rod, the motor, the intake valve, the air extraction valve, the heating device, the temperature sensor, the humidity sensor, the vacuum degree sensor and the alarm lamp are all electrically connected to the control panel.

[0012] The beneficial effects achieved by the present utility model adopting the above structure are as follows:

[0013] 1. By arranging the desiccant box, the rotating assembly and the telescopic assembly, this solution achieves the effect of stirring the gas inside the first box body, accelerating the gas flow inside the first box body, making the lithium battery to be dried heat more evenly, accelerating the drying speed of the lithium battery, thereby improving the production efficiency of the lithium battery and reducing the energy consumption;

[0014] 2. This solution improves the heat transfer speed inside the first box body through heat convection and heat conduction by setting up an air flow device, reduces the time required for temperature rise, thereby improving the production efficiency of lithium batteries and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the drawings:

[0016] Figure 1 is a schematic diagram of the overall structure of a drying device for lithium batteries proposed by this solution;

[0017] Figure 2 is a schematic diagram of the internal structure of the second box body of a drying device for lithium batteries proposed by this solution;

[0018] Figure 3 is a front view of the second box body of a drying device for lithium batteries proposed by this solution;

[0019] Figure 4 is a sectional view of the second box body of a drying device for lithium batteries proposed by this solution.

[0020] Among them, 1. The first box body, 2. The second box body, 3. The first vacuum pump, 4. The heating device, 5. The pallet, 6. The support plate, 7. The partition board, 8. The temperature sensor, 9. The humidity sensor, 10. The vacuum degree sensor, 11. The alarm lamp, 12. The control panel, 13. The first exhaust pipe, 14. The desiccant box, 15. The support telescopic rod, 16. The round plate, 17. The electric telescopic rod, 18. The lithium battery, 19. The rotating assembly, 20. The telescopic assembly, 21. The box door, 22. The intake valve, 23. The handle, 24. The blower, 25. The air box, 26. The dryer, 27. The second vacuum pump, 28. The air extraction valve, 29. The air flow device, 30. The vacuum device, 31. The monitoring assembly, 32. The motor, 33. The first gear, 34. The second gear, 35. The support platform, 36. The intake pipe, 37. The second exhaust pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] As Figures 1 - 4As shown in the figure, a drying device for a lithium battery of the present utility model includes a first box body 1, a second box body 2, a vacuum device 30, a desiccant box 14, a heating device 4, an air flow device 29, a telescopic assembly 20, a rotating assembly 19 and a monitoring assembly 31. The first box body 1 is fixedly arranged on the top of the second box body 2. The rotating assembly 19 is fixedly arranged inside the second box body 2. The telescopic assembly 20 is fixedly arranged on the top of the rotating assembly 19. The vacuum device 30 is fixedly arranged on the right side of the first box body 1. The air flow device 29 is fixedly arranged on the left side of the first box body 1. The desiccant box 14 is fixedly arranged on the top of the telescopic assembly 20 and is located inside the first box body 1. The heating device 4 is fixedly arranged on both inner side walls of the first box body 1. The monitoring assembly 31 is fixedly arranged on the first box body 1.

[0023] As Figures 1 - 4 shown in the figure, the rotating assembly 19 includes a motor 32, a support platform 35, a first gear 33 and a second gear 34. The support platform 35 is fixedly arranged on the inner bottom wall of the second box body 2. A limiting ring is sleeved at the lower end of the support platform 35. The second gear 34 is rotatably arranged on the support platform 35. The bottom surface of the second gear 34 is in contact with the top surface of the limiting ring. The first gear 33 is fixedly arranged on the output shaft of the motor 32. The first gear 33 is meshed and connected with the second gear 34.

[0024] As Figures 1 - 4 shown in the figure, the telescopic assembly 20 includes an electric telescopic rod 17 and a support telescopic rod 15. A through hole is opened at the bottom of the first box body 1. A circular plate 16 is rotatably arranged in the through hole. The electric telescopic rod 17 penetrates through the circular plate 16 and is fixedly arranged on the top of the support platform 35. The top of the output shaft of the electric telescopic rod 17 is rotatably connected with the bottom of the desiccant box 14. The support telescopic rod 15 is fixedly arranged on both sides of the electric telescopic rod 17. The support telescopic rod 15 penetrates through the circular plate 16 and is fixedly arranged between the top of the second gear 34 and the bottom of the desiccant box 14.

[0025] As Figures 1 - 4 shown in the figure, on both inner side walls of the first box body 1, a support plate 5 is fixedly arranged. A support board 6 is slidably arranged on the support plate 5. A plurality of through holes are uniformly opened on the support board 6. A plurality of partition boards 7 are fixedly arranged on the support board 6. The partition boards 7 divide the support board 6 to form a plurality of grooves. The lithium battery 18 is arranged in the grooves. On the front of the left side of the first box body 1, a box door 21 is hinged. A handle 23 is fixedly arranged on the side surface of the box door 21.

[0026] As Figures 1 - 4 shown in the figure, the vacuum device 30 includes a first vacuum pump 3 and a first exhaust pipe 13. One end of the first exhaust pipe 13 is communicated with the air inlet of the first vacuum pump 3, and the other end is communicated with the inside of the first box body 1.

[0027] As Figures 1 - 4As shown in the figure, the air flow device 29 includes an air box 25, a blower 24, a second vacuum pump 27, a dryer 26, an air inlet pipe 36 and a second exhaust pipe 37. One end of the air inlet pipe 36 communicates with the inside of the first box body 1, and the other end communicates with the exhaust port of the blower 24. The air inlet of the blower 24 communicates with the inside of the air box 25. The gas inside the air box 25 is nitrogen or inert gas. One end of the second exhaust pipe 37 communicates with the inside of the first box body 1, and the other end communicates with the air inlet of the second vacuum pump 27. The exhaust port of the second vacuum pump 27 communicates with the air inlet of the dryer 26. The exhaust port of the dryer 26 communicates with the inside of the air box 25. An air inlet valve 22 and an air extraction valve 28 are respectively fixed on the air inlet pipe 36 and the second exhaust pipe 37.

[0028] As Figures 1 - 4 As shown in the figure, the monitoring component 31 includes a control panel 12, a temperature sensor 8, a humidity sensor 9, a vacuum degree sensor 10 and an alarm lamp 11. The temperature sensor 8, the humidity sensor 9 and the vacuum degree sensor 10 are fixedly arranged on the inner rear wall of the first box body 1 and are arranged in sequence from left to right. The control panel 12 and the alarm lamp 11 are fixedly arranged on the top of the first box body 1. The first vacuum pump 3, the blower 24, the second vacuum pump 27, the electric telescopic rod 17, the motor 32, the air inlet valve 22, the air extraction valve 28, the heating device 4, the dryer 26, the temperature sensor 8, the humidity sensor 9, the vacuum degree sensor 10 and the alarm lamp 11 are all electrically connected to the control panel 12. The temperature sensor 8 is used to detect the temperature inside the first box body 1, and the humidity sensor 9 is used to detect the humidity inside the first box body 1.

[0029] During specific use, the staff places the lithium battery 18 to be dried into the groove on the support plate 6, then places the support plate 6 on the pallet 5, slides it into the box body and closes the box door 21;

[0030] The first vacuum pump 3 and the heating device 4 are controlled to start through the control panel 12. During the operation of the drying device, the first vacuum pump 3 and the second vacuum pump 27 will not start simultaneously. The first vacuum pump 3 starts to evacuate the inside of the first box body 1. When the vacuum degree inside the first box body 1 reaches the first set vacuum degree value, the vacuum degree sensor 10 transmits a signal to the control panel 12. After receiving the signal, the control panel 12 controls the first vacuum pump 3 to stop operating and controls the dryer 26, the blower 24, the electric telescopic rod 17 and the motor 32 to start and opens the air inlet valve 22. The dry gas in the air box enters the inside of the first box body 1 after passing through the blower 24 and the air inlet pipe 36; when the first vacuum pump 3 operates, the inside of the first box body 1 is in a negative pressure state, and the boiling point of water decreases as the vacuum degree increases. Therefore, the moisture inside the first box body 1 will become water vapor faster under the action of the heating device 4.

[0031] When the internal vacuum degree of the first box body 1 reaches the second set value of the vacuum degree, the vacuum degree sensor 10 transmits a signal to the control panel 12. After receiving the signal, the control panel 12 controls the blower 24 to stop running and closes the intake valve 22, and controls the second vacuum pump 27 to start and open the air extraction valve 28. The gas inside the first box body 1 enters the exhaust pipe two 37, the second vacuum pump 27, the dryer 26 and the air box 25 in sequence from the air extraction port. When the gas enters the dryer 26, the dryer 26 will dry the incoming gas. After the blower 24 and the second vacuum pump 27 run alternately for many times, the heating device 4, the blower 24, the electric telescopic rod 17 and the motor 32 are turned off through the control panel 12. After the lithium battery 18 has cooled down, the support plate 6 can be slid out of the first box body 1;

[0032] At the same time, when the blower 24 and the second vacuum pump 27 run alternately for many times, during the operation of the telescopic assembly 20 and the rotating assembly 19, by controlling the telescopic movement of the electric telescopic rod 17, the support telescopic rod 15 is driven to expand and contract. The desiccant box 14 moves up and down reciprocally with the support telescopic rod 15. The motor 32 drives the first gear 33 to rotate, the first gear 33 drives the second gear 34 to rotate, the second gear 34 drives the support telescopic rod 15 to rotate, and the desiccant box 14 rotates with the support telescopic rod 15. The desiccant box 14 plays a role in stirring the gas inside the first box body 1, accelerating the gas flow inside the first box body 1, making the lithium battery 18 to be dried heat more evenly, and thus accelerating the drying speed of the lithium battery 18.

[0033] Through the arranged air flow device 29, desiccant box 14, telescopic assembly 20 and rotating assembly 19, heat transfer is carried out inside the first box body 1 in the way of heat convection and heat conduction, which improves the speed of temperature rise inside the first box body 1, reduces the time required for temperature rise, improves the production efficiency and reduces the energy consumption. The desiccant box 14 is filled with desiccant particles, so that the desiccant box 14 effectively absorbs the water vapor inside the first box body 1 and avoids the contact between the water vapor and the lithium battery 18.

[0034] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A drying device for a lithium battery, characterized in that: It includes a first box body (1), a second box body (2), a vacuum device (30), a desiccant box (14), a heating device (4), an air flow device (29), a telescopic assembly (20), a rotating assembly (19) and a monitoring assembly (31). The first box body (1) is fixedly arranged on the top of the second box body (2). The rotating assembly (19) is fixedly arranged inside the second box body (2). The telescopic assembly (20) is fixedly arranged on the top of the rotating assembly (19). The vacuum device (30) is fixedly arranged on the right side of the first box body (1). The air flow device (29) is fixedly arranged on the left side of the first box body (1). The desiccant box (14) is fixedly arranged on the top of the telescopic assembly (20) and is located inside the first box body (1). The heating device (4) is fixedly arranged on the two inner side walls of the first box body (1). The monitoring assembly (31) is fixedly arranged on the first box body (1).

2. The drying device for a lithium battery according to claim 1, characterized in that: The rotating assembly (19) includes a motor (32), a support platform (35), a first gear (33) and a second gear (34). The support platform (35) is fixedly arranged on the inner bottom wall of the second box body (2). A limiting ring is sleeved at the lower end of the support platform (35). The second gear (34) is rotatably arranged on the support platform (35). The bottom surface of the second gear (34) is in contact with the top surface of the limiting ring. The first gear (33) is fixedly arranged on the output shaft of the motor (32). The first gear (33) is meshed and connected with the second gear (34).

3. A drying device for a lithium battery according to claim 1 or 2, characterized in that: The telescopic assembly (20) includes an electric telescopic rod (17) and a support telescopic rod (15). A through hole is formed in the bottom of the first box body (1). A circular plate (16) is rotatably arranged in the through hole. The electric telescopic rod (17) passes through the circular plate (16) and is fixedly arranged on the top of the support platform (35). The top of the output shaft of the electric telescopic rod (17) is rotatably connected with the bottom of the desiccant box (14). The support telescopic rod (15) passes through the circular plate (16) and is fixedly arranged between the top of the second gear (34) and the bottom of the desiccant box (14). The support telescopic rod (15) is located on both sides of the electric telescopic rod (17).

4. A drying device for a lithium battery according to claim 1, characterized in that: On the two inner side walls of the first box body (1), a support plate (5) is fixedly arranged. A support board (6) is slidably arranged on the support plate (5). A plurality of through holes are uniformly formed in the support board (6). A plurality of partition boards (7) are fixedly arranged on the support board (6). The partition boards (7) divide the support board (6) to form a plurality of grooves. The lithium battery (18) is arranged in the grooves. A box door (21) is hinged on the front left side of the first box body (1). A handle (23) is fixedly arranged on the side surface of the box door (21).

5. The drying device for a lithium battery according to claim 4, characterized in that: The vacuum device (30) includes a first vacuum pump (3) and a first exhaust pipe (13). One end of the first exhaust pipe (13) is communicated with the air inlet of the first vacuum pump (3), and the other end is communicated with the inside of the first box body (1).

6. The drying device for a lithium battery according to claim 5, wherein: The airflow device (29) includes an air box (25), a blower (24), a second vacuum pump (27), a dryer (26), an intake pipe (36), and a second exhaust pipe (37). One end of the intake pipe (36) is in communication with the interior of the first box body (1), and the other end thereof is in communication with the exhaust port of the blower (24). The intake port of the blower (24) is in communication with the interior of the air box (25). The gas inside the air box (25) is nitrogen or an inert gas. One end of the second exhaust pipe (37) is in communication with the interior of the first box body (1), and the other end thereof is in communication with the intake port of the second vacuum pump (27). The exhaust port of the second vacuum pump (27) is in communication with the intake port of the dryer (26). The exhaust port of the dryer (26) is in communication with the interior of the air box (25). An intake valve (22) is connected in series to the intake pipe (36), and an air extraction valve (28) is connected in series to the second exhaust pipe (37).

7. A drying device for a lithium battery according to claim 5 or 6, characterized in that: The monitoring assembly (31) includes a control panel (12), a temperature sensor (8), a humidity sensor (9), a vacuum degree sensor (10), and an alarm lamp (11). The temperature sensor (8), the humidity sensor (9), and the vacuum degree sensor (10) are fixedly arranged on the inner rear wall of the first box body (1). The control panel (12) and the alarm lamp (11) are fixedly arranged on the top of the first box body (1). The first vacuum pump (3), the blower (24), the second vacuum pump (27), the dryer (26), the electric telescopic rod (17), the motor (32), the intake valve (22), the air extraction valve (28), the heating device (4), the temperature sensor (8), the humidity sensor (9), the vacuum degree sensor (10), and the alarm lamp (11) are all electrically connected to the control panel (12).

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