Pre-charging device of liquid injection machine

Abstract

This invention relates to the field of pre-charging device technology and discloses a pre-charging device for a liquid injection machine. It solves the problem that existing pre-charging devices cannot replenish electrolyte after charging. The device includes a pre-charging assembly located inside a vacuum glove box. A charging power supply is fixedly installed at the top of the vacuum glove box, and a transition chamber is located at one end. The pre-charging assembly consists of an electrolyte tank, an L-shaped support bracket I, an L-shaped support bracket II, several support rail assemblies, several electrical connection isolation components, an auxiliary drying box, a heating plate, a lifting adjustment assembly, and several lifting traction ropes. The electrical connection isolation components are sleeved on the support rail assemblies. This pre-charging device for a liquid injection machine enables pre-charging of the battery and replenishment of electrolyte after pre-charging, thereby increasing battery capacity.

Description

Technical Field

[0001] This invention belongs to the technical field of pre-charging devices, specifically a pre-charging device for a liquid injection machine. Background Technology

[0002] The 18650 is the ancestor of lithium-ion batteries, a standard lithium-ion battery model. The "18" indicates a diameter of 18mm, "65" indicates a length of 65mm, and "0" indicates a cylindrical shape. Common 18650 batteries are divided into lithium-ion batteries and lithium iron phosphate batteries. Lithium-ion batteries have voltages of 3.6V and 4.2V, while lithium iron phosphate batteries have a voltage of 3.2V and a capacity typically ranging from 1200mAh to 3000mAh, with common capacities ranging from 2200mAh to 3600mAh.

[0003] With the rapid development of pure electric vehicles, the existing materials and system combinations of 18650 batteries can no longer meet the energy density requirements of electric vehicles. To improve the driving range of electric vehicles, the energy density of the battery itself must be increased. Due to the limited internal space of the battery, when the internal space is filled to the maximum extent by active materials, the remaining electrolyte space is relatively reduced. As the electrolyte is the transport medium for lithium ions inside the lithium-ion battery, its reduction will inevitably have a significant impact on the battery's safety performance. The production of lithium-ion batteries generally involves processes such as primary electrolyte filling, pre-charging, and sealing. During pre-charging, some electrolyte inside the battery is lost. Therefore, a pre-charging device for the electrolyte filling machine is needed to improve the electrolyte absorption capacity of the 18650 battery. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a pre-charging device for a liquid injection machine, which effectively solves the problem that existing pre-charging devices cannot replenish electrolyte to the battery after charging.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pre-charging device for an injection machine, comprising a pre-charging component located inside a vacuum glove box. A charging power supply is fixedly installed at the top of the vacuum glove box, and a transition chamber is provided at one end of the vacuum glove box. The pre-charging component consists of an electrolyte tank, an L-shaped support bracket I, an L-shaped support bracket II, several support rail assemblies, several electrical connection isolation components, an auxiliary drying box, a heating plate, a lifting adjustment component, and several lifting traction ropes. The electrolyte tank is connected to the inside of the vacuum glove box, and the electrolyte tank and the vacuum glove box are connected by guide rails. The auxiliary drying box is fixedly connected to the top of the inside of the vacuum glove box, and the heating plate is fixedly connected to the top of the inside of the auxiliary drying box. The lifting adjustment component is fixedly connected to the top of the auxiliary drying box and connected to the L-shaped support bracket I and L-shaped support bracket II via lifting traction ropes. The L-shaped support bracket I and L-shaped support bracket II are located at opposite ends inside the electrolyte tank. The electrical connection isolation components are sleeved on the support rail assemblies.

[0006] Preferably, the top end of the L-shaped support bracket one is provided with a positive electrode plate, the top end of the L-shaped support bracket two is provided with a negative electrode plate, one end of the support rail assembly is provided with a positive electrode connection support that matches the positive electrode plate, and the other end of the support rail assembly is provided with a negative electrode connection support that matches the negative electrode plate.

[0007] Preferably, the support rail assembly consists of a first support rail and a second support rail, both of which are fixedly connected between the positive terminal connection support and the negative terminal connection support.

[0008] Preferably, the electrical connection isolation assembly comprises a movable sleeve, a support plate, a positive electrode connection plate, a negative electrode connection plate, several springs, a top support plate, a first side pressure plate, a second side pressure plate, and a handle. The movable sleeve is fitted onto the first and second support guide rails. The support plate is fixedly connected to the top of the movable sleeve. The positive electrode connection plate and the negative electrode connection plate are respectively connected to the two sides of the support plate by springs. The top support plate is fixedly connected to the top of the support plate. The first side pressure plate and the second side pressure plate are respectively fixedly connected to the two ends of the bottom of the top support plate. The handle is fixedly connected to the top of the top support plate.

[0009] Preferably, the movable sleeve has a first slot and a second slot respectively inside. A positive electrode strip is provided at the top of the first slot and the second slot, and a negative electrode strip is provided at the bottom of the first slot and the second slot. A positive electrode strip matching the positive electrode strip is provided at the top of the first support rail and the second support rail, and a negative electrode strip matching the negative electrode strip is provided at the bottom of the first support rail and the second support rail.

[0010] Preferably, the supporting top plate and the supporting vertical plate are connected by a movable shaft, the positive electrode connecting plate and the supporting top plate are connected by a first traction rope group, and the negative electrode connecting plate and the supporting top plate are connected by a second traction rope group.

[0011] Preferably, the support plate has a placement chamber inside, and guide wheels one, two and three are provided on both sides of the placement chamber to match the traction rope group one and traction rope group two.

[0012] Preferably, the top of each side of the support plate is provided with a guide sleeve that passes through the support plate and matches the first traction rope group and the second traction rope group. The middle position of each side of the support plate is provided with a cable outlet hole 1 that matches the first traction rope group and the second traction rope group. The bottom of each side of the support plate is provided with a cable outlet hole 2 that matches the first traction rope group and the second traction rope group.

[0013] Preferably, the lifting adjustment assembly consists of a servo motor, a first pulley, a first rotating shaft, a second rotating shaft, several second pulleys, a belt, several spools, and several mounting bases. The first pulley is fixedly connected to the output shaft of the servo motor. The first and second rotating shafts are fixedly connected to the top of the auxiliary drying chamber through the mounting bases. The second pulleys are respectively sleeved in the middle of the first and second rotating shafts and connected to the first pulley through the belt. The spools are respectively fixedly connected to both ends of the first and second rotating shafts.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) In operation, the battery can be precharged by setting up a pre-charging assembly consisting of an electrolyte tank, L-shaped support bracket one, L-shaped support bracket two, several support rail groups, several electrical connection isolation components, auxiliary drying box, electric heating plate, lifting adjustment assembly and several lifting traction ropes. After precharging, electrolyte can be replenished, thereby increasing the battery capacity.

[0016] (2) By setting up an electrical connection isolation assembly consisting of a movable sleeve, a support plate, a positive electrode connection plate, a negative electrode connection plate, several springs, a support top plate, a side pressure plate one, a side pressure plate two and a handle, it is easy to install and fix the battery, thereby facilitating the pre-charging and replenishment of electrolyte for the battery. By setting up a movable shaft, a traction rope group one, a traction rope group two, a placement chamber, a guide wheel one, a guide wheel two, a guide wheel three, a guide sleeve, a wire outlet hole one and a wire outlet hole two, the battery can be limited after installation, improving the stability of battery installation.

[0017] (3) By setting up a lifting and adjusting assembly consisting of a servo motor, pulley one, shaft one, shaft two, several pulley two, belt, several spools and several mounting bases, the L-shaped support bracket one, L-shaped support bracket two, support rail group and electrical connection isolation assembly can be lifted and lowered, thereby facilitating the alternating pre-charging and electrolyte replenishment of the battery. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0019] In the attached diagram:

[0020] Figure 1 This is a schematic diagram of the vacuum glove box structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the connection structure between the pre-charging component and the vacuum glove box of the present invention;

[0022] Figure 3 This is a schematic diagram of the pre-charging component structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the support guide rail assembly structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the lifting and adjusting component structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the electrical connection isolation component structure of the present invention;

[0026] Figure 7 This is a cross-sectional view of the electrical connection isolation component of the present invention;

[0027] Figure 8 This is a schematic diagram of the internal structure of the supporting plate of the present invention;

[0028] Figure 9 This is a side view of the electrical connection isolation component of the present invention;

[0029] In the diagram: 1. Pre-charging component; 2. Vacuum glove box; 3. Charging power supply; 4. Transition chamber; 5. Electrolyte tank; 6. L-shaped support bracket one; 7. L-shaped support bracket two; 8. Support rail assembly; 9. Electrical connection isolation component; 10. Auxiliary drying box; 11. Heating plate; 12. Lifting adjustment component; 13. Lifting traction rope; 14. Guide rail; 15. Positive electrode plate; 16. Negative electrode plate; 17. Positive electrode connection support; 18. Negative electrode connection support; 19. First support rail; 20. Second support rail; 21. Movable sleeve; 22. Support plate; 23. Positive electrode connection plate; 24. Negative electrode connection plate; 25. Spring; 26. 1. Support top plate; 27. Side pressure plate one; 28. Side pressure plate two; 29. ​​Handle; 30. First slot; 31. Second slot; 32. Positive electrode strip one; 33. Negative electrode strip one; 34. Positive electrode strip two; 35. Negative electrode strip two; 36. Movable shaft; 37. Traction rope group one; 38. Traction rope group two; 39. Placement chamber; 40. Guide wheel one; 41. Guide wheel two; 42. Guide wheel three; 43. Guide sleeve; 44. Cable outlet hole one; 45. Cable outlet hole two; 46. Servo motor; 47. Belt pulley one; 48. Rotating shaft one; 49. Rotating shaft two; 50. Belt pulley two; 51. Belt; 52. Thread pulley; 53. Mounting base. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] Example 1, by Figures 1 to 3The present invention discloses a pre-charging device for an injection machine, comprising a pre-charging component 1 located inside a vacuum glove box 2. A charging power supply 3 is fixedly installed at the top of the vacuum glove box 2, and a transition chamber 4 is provided at one end of the vacuum glove box 2. The pre-charging component 1 consists of an electrolyte tank 5, an L-shaped support bracket 1 6, an L-shaped support bracket 2 7, several support rail assemblies 8, several electrical connection isolation components 9, an auxiliary drying box 10, a heating plate 11, a lifting adjustment component 12, and several lifting traction ropes 13. The electrolyte tank 5 is connected to the vacuum glove box 2. Inside, the electrolyte tank 5 and the vacuum glove box 2 are connected by a guide rail 14. The auxiliary drying box 10 is fixedly connected to the top of the vacuum glove box 2. The electric heating plate 11 is fixedly connected to the top of the auxiliary drying box 10. The lifting adjustment component 12 is fixedly connected to the top of the auxiliary drying box 10 and is connected to the L-shaped support bracket 6 and the L-shaped support bracket 7 through the lifting traction rope 13. The L-shaped support bracket 6 and the L-shaped support bracket 7 are located at both ends inside the electrolyte tank 5. The electrical connection isolation component 9 is sleeved on the support guide rail group 8.

[0032] The battery is placed on top of the support rail assembly 8, and is separated and electrically connected via the electrical connection isolation component 9. After installation, the L-shaped support bracket 1 6, L-shaped support bracket 2 7, support rail assembly 8, and electrical connection isolation component 9 are lowered and fall into the electrolyte tank 5 via the lifting adjustment component 12 and lifting traction rope 13, allowing the electrolyte to enter the battery. The immersion time is set, and when the electrolyte content inside the battery reaches 70%, the L-shaped support bracket 1 6, L-shaped support bracket 2 7, support rail assembly 8, and electrical connection isolation component 9 are raised to the auxiliary drying box 10 via the lifting adjustment component 12 and lifting traction rope 13, thereby bringing the battery into the auxiliary drying box 10. The battery is first dried inside the auxiliary drying box 10. After drying, the battery is pre-charged via the charging power supply 3. After pre-charging, the battery is then immersed in the electrolyte tank 5 for a second immersion, which increases the electrolyte content inside the battery and thus increases the battery capacity.

[0033] Example 2, by Figure 3 and Figure 4 As shown, the top of the L-shaped support bracket 6 is provided with a positive electrode plate 15, the top of the L-shaped support bracket 7 is provided with a negative electrode plate 16, one end of the support rail assembly 8 is provided with a positive electrode connection support 17 that matches the positive electrode plate 15, and the other end of the support rail assembly 8 is provided with a negative electrode connection support 18 that matches the negative electrode plate 16. The support rail assembly 8 is composed of a first support rail 19 and a second support rail 20, and both the first support rail 19 and the second support rail 20 are fixedly connected between the positive electrode connection support 17 and the negative electrode connection support 18.

[0034] By connecting the positive electrode 15 to the positive electrode connection support 17 and the negative electrode 16 to the negative electrode connection support 18, the electrical connection isolation component 9 can be powered through the first support rail 19 and the second support rail 20 to achieve pre-charging operation.

[0035] Example 3, by Figure 1 , Figure 4 , Figure 6 , Figure 7 and Figure 9 The electrical connection isolation assembly 9 is composed of a movable sleeve 21, a support plate 22, a positive electrode connection plate 23, a negative electrode connection plate 24, several springs 25, a top support plate 26, a first side pressure plate 27, a second side pressure plate 28, and a handle 29. The movable sleeve 21 is fitted onto the first support guide rail 19 and the second support guide rail 20. The support plate 22 is fixedly connected to the top of the movable sleeve 21. The positive electrode connection plate 23 and the negative electrode connection plate 24 are respectively connected to the two sides of the support plate 22 by springs 25. The top support plate 26 is fixedly connected to the top of the support plate 22. The first side pressure plate 27 and the second side pressure plate 28 are respectively fixedly connected to the support plate 21. At both ends of the bottom of the top plate 26, the handle 29 is fixedly connected to the top of the top plate 26. The movable sleeve 21 is provided with a first slot 30 and a second slot 31. The top of the first slot 30 and the second slot 31 are provided with a positive electrode strip 32. The bottom of the first slot 30 and the second slot 31 are provided with a negative electrode strip 33. The top of the first support rail 19 and the second support rail 20 are provided with a positive electrode strip 34 that matches the positive electrode strip 32. The bottom of the first support rail 19 and the second support rail 20 are provided with a negative electrode strip 35 that matches the negative electrode strip 33.

[0036] All batteries are placed on top of the first support rail 19 and the second support rail 20, and the batteries are placed at intervals with the electrical connection isolation component 9, so that the positive electrode connection plate 23 is connected to the positive terminal of the battery and the negative electrode connection plate 24 is connected to the negative terminal of the battery. The spring 25 can improve the stability of the connection between the positive electrode connection plate 23 and the negative electrode connection plate 24 and the positive and negative terminals of the battery, and avoid poor contact. When the movable sleeve 21 is connected to the first support rail 19 and the second support rail 20, it conducts electricity through the positive electrode strip 32, the negative electrode strip 33, the positive electrode strip 34, and the negative electrode strip 35, thereby enabling the positive electrode connection plate 23 and the negative electrode connection plate 24 to conduct electricity.

[0037] Example 4, by Figures 6 to 8As shown, the top support plate 26 and the vertical support plate 22 are connected by a movable shaft 36. The positive electrode connecting plate 23 is connected to the top support plate 26 by a traction rope group 37. The negative electrode connecting plate 24 is connected to the top support plate 26 by a traction rope group 38. The vertical support plate 22 has a placement chamber 39 inside. Both sides of the placement chamber 39 are provided with guide wheels 40, 41, and 42 that match the traction rope group 37 and 38. The top of both sides of the vertical support plate 22 is provided with guide sleeves 43 that pass through the vertical support plate 22 and match the traction rope group 37 and 38. The middle position of both sides of the vertical support plate 22 is provided with a cable outlet hole 44 that matches the traction rope group 37 and 38. The bottom of both sides of the vertical support plate 22 is provided with a cable outlet hole 45 that matches the traction rope group 37 and 38.

[0038] After the battery is installed, turn the handle 29 to rotate the support top plate 26, which in turn rotates the side pressure plate 27 and the side pressure plate 28. This causes the side pressure plate 27 and the side pressure plate 28 to limit and press the battery, improving the stability of the battery after installation. When the battery is removed, the support top plate 26 rotates. Since the guide sleeve 43 is in the extended state, it will pull the traction rope group 1 37 and the traction rope group 2 38 outward. During the movement, it can pull the positive electrode connecting plate 23 and the negative electrode connecting plate 24. At this time, the spring 25 is in the compressed state, which allows the battery to be in a relaxed state, making it easier to remove the battery. When the traction rope group 1 37 and the traction rope group 2 38 are pulled, they can be guided by the guide wheel 1 40, the guide wheel 2 41, the guide wheel 3 42, the guide sleeve 43, the cable outlet hole 1 44, and the cable outlet hole 2 45, improving the stability of the traction rope group 1 37 and the traction rope group 2 38.

[0039] Example 5, by Figure 3 and Figure 5 The lifting adjustment assembly 12 is composed of a servo motor 46, a pulley 47, a shaft 48, a shaft 49, several pulleys 50, a belt 51, several spools 52, and several mounting bases 53. The pulley 47 is fixedly connected to the output shaft of the servo motor 46. The shafts 48 and 49 are fixedly connected to the top of the auxiliary drying chamber 10 through the mounting bases 53. The pulleys 50 are respectively sleeved in the middle of the shafts 48 and 49 and connected to the pulley 47 through the belt 51. The spools 52 are respectively fixedly connected to the two ends of the shafts 48 and 49.

[0040] Servo motor 46 drives pulley 47 to rotate, and pulley 47 drives pulley 50 to rotate via belt 51, which in turn drives shaft 48 and shaft 49 to rotate, thereby driving four pulleys 52 to rotate synchronously. The four pulleys 52 drive four lifting traction ropes 13 to move synchronously, thereby stably driving the L-shaped support bracket 6, L-shaped support bracket 7, support rail assembly 8, and electrical connection isolation assembly 9 to lift stably.

[0041] In operation, a pre-charging assembly, consisting of an electrolyte tank, L-shaped support bracket one, L-shaped support bracket two, several support rail assemblies, several electrical connection isolation components, an auxiliary drying box, a heating plate, a lifting adjustment assembly, and several lifting traction ropes, enables pre-charging of the battery. After pre-charging, electrolyte can be replenished, thereby increasing battery capacity. The electrical connection isolation assembly, consisting of a movable sleeve, a support plate, a positive electrode connection plate, a negative electrode connection plate, several springs, a support top plate, side pressure plate one, side pressure plate two, and a handle, facilitates battery installation and fixation, thus enabling battery maintenance. The battery pre-charging and electrolyte replenishment system is equipped with a movable shaft, traction rope assembly 1, traction rope assembly 2, placement chamber, guide wheel 1, guide wheel 2, guide wheel 3, guide sleeve, cable outlet hole 1, and cable outlet hole 2. These components limit the battery's position after installation, improving installation stability. A lifting and adjusting assembly, consisting of a servo motor, pulley 1, rotating shaft 1, rotating shaft 2, several pulleys 2, a belt, several spools, and several mounting seats, drives the L-shaped support bracket 1, L-shaped support bracket 2, support rail assembly, and electrical connection isolation assembly to move up and down, facilitating alternating pre-charging and electrolyte replenishment.

Claims

1. A liquid injection machine pre-charging device comprising a pre-charging assembly (1), characterized in that: The pre-charging assembly (1) is located in the inside of the vacuum glove box (2), the top end of the vacuum glove box (2) is fixedly provided with a charging power supply (3), one end of the vacuum glove box (2) is provided with an excess bin (4), the pre-charging assembly (1) is composed of an electrolyte tank (5), an L-shaped support bracket one (6), an L-shaped support bracket two (7), a plurality of support rail groups (8), a plurality of electric connection isolation assemblies (9), an auxiliary drying box (10), an electric heating plate (11), a lifting adjustment assembly (12) and a plurality of lifting traction ropes (13), the electrolyte tank (5) is connected to the inside of the vacuum glove box (2), the electrolyte tank (5) and the vacuum glove box (2) are connected through a guide rail (14), the auxiliary drying box (10) is fixedly connected to the top end in the inside of the vacuum glove box (2), the electric heating plate (11) is fixedly connected to the top end in the inside of the auxiliary drying box (10), the lifting adjustment assembly (12) is fixedly connected to the top end of the auxiliary drying box (10) and connected with the L-shaped support bracket one (6) and the L-shaped support bracket two (7) through the lifting traction ropes (13), the L-shaped support bracket one (6) and the L-shaped support bracket two (7) are located at two ends in the inside of the electrolyte tank (5) respectively, and the electric connection isolation assembly (9) is sleeved on the support rail group (8).

2. The pre-charging device of claim 1, wherein: The top end of the L-shaped support bracket one (6) is provided with a positive plate (15), the top end of the L-shaped support bracket two (7) is provided with a negative plate (16), one end of the support rail group (8) is provided with a positive connection support (17) matched with the positive plate (15), and the other end of the support rail group (8) is provided with a negative connection support (18) matched with the negative plate (16).

3. The pre-charging device of claim 2, wherein: The support rail group (8) is composed of a first support rail (19) and a second support rail (20), and the first support rail (19) and the second support rail (20) are fixedly connected between the positive connection support (17) and the negative connection support (18).

4. The pre-charging device of claim 3, wherein: The electric connection isolation assembly (9) is composed of a movable clamping sleeve (21), a support vertical plate (22), a positive electrode connecting plate (23), a negative electrode connecting plate (24), a plurality of springs (25), a support top plate (26), a side pressing plate one (27), a side pressing plate two (28) and a handle (29), the movable clamping sleeve (21) is sleeved on the first support rail (19) and the second support rail (20), the support vertical plate (22) is fixedly connected to the top end of the movable clamping sleeve (21), the positive electrode connecting plate (23) and the negative electrode connecting plate (24) are connected to the two sides of the support vertical plate (22) through the springs (25) respectively, the support top plate (26) is fixedly connected to the top end of the support vertical plate (22), the side pressing plate one (27) and the side pressing plate two (28) are fixedly connected to the two ends of the bottom of the support top plate (26) respectively, and the handle (29) is fixedly connected to the top end of the support top plate (26).

5. The pre-charging device of claim 4, wherein: The inner part of the movable card sleeve (21) is respectively provided with a first clamping groove (30) and a second clamping groove (31), the top end of the first clamping groove (30) and the second clamping groove (31) is provided with a positive electrode strip one (32), the bottom end of the first clamping groove (30) and the second clamping groove (31) is provided with a negative electrode strip one (33), the top end of the first supporting rail (19) and the second supporting rail (20) is provided with a positive electrode strip two (34) matched with the positive electrode strip one (32), and the bottom end of the first supporting rail (19) and the second supporting rail (20) is provided with a negative electrode strip two (35) matched with the negative electrode strip one (33).

6. The pre-charging device of claim 4, wherein: The supporting top plate (26) and the supporting vertical plate (22) are connected through a movable shaft (36), the positive electrode connecting plate (23) and the supporting top plate (26) are connected through a traction rope group one (37), and the negative electrode connecting plate (24) and the supporting top plate (26) are connected through a traction rope group two (38).

7. The pre-charging device of claim 6, wherein: The supporting vertical plate (22) is internally provided with a placing chamber (39), and the two sides of the placing chamber (39) are provided with a guide wheel one (40), a guide wheel two (41) and a guide wheel three (42) matched with the traction rope group one (37) and the traction rope group two (38).

8. The pre-charging device of claim 6, wherein: The top end of the two sides of the supporting vertical plate (22) is provided with a guide sleeve (43) penetrating through the supporting vertical plate (22) and matched with the traction rope group one (37) and the traction rope group two (38), the middle position of the two sides of the supporting vertical plate (22) is provided with a wire outlet hole one (44) matched with the traction rope group one (37) and the traction rope group two (38), and the bottom end of the two sides of the supporting vertical plate (22) is provided with a wire outlet hole two (45) matched with the traction rope group one (37) and the traction rope group two (38).

9. The pre-charging device of claim 1, wherein: The lifting adjusting assembly (12) is composed of a servo motor (46), a belt pulley one (47), a rotating shaft one (48), a rotating shaft two (49), a plurality of belt pulley twos (50), a belt (51), a plurality of wire wheels (52) and a plurality of mounting seats (53), the belt pulley one (47) is fixedly connected to the output shaft of the servo motor (46), the rotating shaft one (48) and the rotating shaft two (49) are fixedly connected to the top end of the auxiliary drying box (10) through the mounting seat (53), the belt pulley two (50) is respectively sleeved at the middle position of the rotating shaft one (48) and the rotating shaft two (49) and connected with the belt pulley one (47) through the belt (51), and the wire wheel (52) is respectively fixedly connected to the two ends of the rotating shaft one (48) and the rotating shaft two (49).

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