A high-efficiency safe liquid injection device for lithium battery preparation

Abstract

The application relates to the technical field of lithium battery preparation, and specifically discloses a high-efficiency and safe liquid injection equipment for lithium battery preparation, which comprises a base, the top of the base is provided with a rotating disc, the top of the rotating disc is provided with a plurality of housings, the interiors of the housings are all provided with box bodies, the interiors of the box bodies are all provided with a plurality of placing boxes, the interiors of the placing boxes are all provided with limiting mechanisms, one side of the base is connected with a moving frame through two telescopic air cylinders, the top of the moving frame is provided with a top plate, the top of the top plate is provided with an electric push rod, the telescopic end of the electric push rod is connected with a mounting frame, the bottom end of the mounting frame is provided with a plurality of liquid injection heads, and the bottom end of the mounting frame is provided with a plurality of cleaning mechanisms. In the application, a small amount of liquid adhered to the surface of the liquid injection head can be automatically wiped off by the cleaning mechanism after the liquid injection of the lithium battery below is completed, the liquid is prevented from dropping downward to affect the use of other components below, and the application facilitates the use of people.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery preparation, and particularly relates to a high-efficiency and safe liquid injection device for lithium battery preparation. BACKGROUND

[0002] The main reason for liquid injection in the lithium battery preparation process is to ensure the formation of ion channels inside the battery, so as to ensure that lithium ions can migrate freely between the positive and negative electrodes during the charging and discharging process, and realize reversible circulation. Specifically, the liquid injection process injects electrolyte into the battery, and the electrolyte is soaked between the positive and negative electrode materials, so that the ions flow freely between the positive and negative electrodes through the electrolyte, thereby realizing the charging and discharging function of the battery.

[0003] In the prior art, when the liquid injection device injects liquid into the lithium battery, multiple liquid injection heads are usually used to inject liquid into multiple lithium batteries at the same time. After the electrolyte is injected into the lithium battery, a small amount of electrolyte will still be attached to the surface of the liquid injection head. During the idle time when the liquid injection head waits for the subsequent lithium battery to be transported to the position directly below it, the small amount of electrolyte on the surface of the liquid injection head may drop downward. Since the organic solvent in the electrolyte is corrosive, it may affect the use of the related components below, thereby causing some defects in the use of the liquid injection device in the prior art. SUMMARY

[0004] The purpose of the present application is to solve the defects in the prior art, and to provide a high-efficiency and safe liquid injection device for lithium battery preparation.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A high-efficiency and safe liquid injection device for lithium battery preparation, comprising a base, a rotating disc is rotatably installed on the top of the base, a plurality of housings are installed on the top of the rotating disc, a box is placed in each of the plurality of housings, a plurality of placement boxes are installed in each of the plurality of boxes, a limiting mechanism for limiting and fixing the lithium battery is arranged in each of the plurality of placement boxes, a movable frame is connected to one side outer wall of the base through two telescopic cylinders, a top plate is installed on the top of the movable frame, an electric push rod is installed on the top of the top plate, an installation frame is connected to the telescopic end of the electric push rod through the top plate, a plurality of liquid injection heads are arranged at the bottom end of the installation frame, and a plurality of cleaning mechanisms for automatically cleaning the surface of the liquid injection heads are arranged at the bottom end of the installation frame and close to the plurality of liquid injection heads.

[0007] Optionally, two electromagnets are installed on the inner bottom surface of each of the plurality of housings, and the bottom end of each of the plurality of boxes is magnetically fixed to the two electromagnets close thereto.

[0008] Optionally, a plurality of first sliding grooves are arranged in the interior of the two sides of the box body, a first sliding block is arranged in the interior of each of the first sliding grooves, and the two side walls of the placing box are connected with the two first sliding blocks close thereto.

[0009] Optionally, the limiting mechanism comprises two grooves arranged in the interior of the placing box, a double-end screw is rotatably arranged in the interior of each of the two grooves, two clamping plates are threadedly arranged on the outer walls of the two double-end screws, a placing plate is arranged in the interior of the placing box, and a weighing sensor is arranged in the interior of the placing plate.

[0010] Optionally, a cover plate is rotatably arranged at the top end of the box body, and a rubber block is connected to the top of the cover plate through a spring.

[0011] Optionally, a threaded portion is arranged at the top end of each of the liquid injection heads, the liquid injection heads are threadedly connected to the bottom end of the mounting frame through the threaded portions at the top ends, and a hexagonal driving end is arranged at one end of each of the liquid injection heads close to the threaded portion.

[0012] Optionally, the cleaning mechanism comprises a plurality of mounting seats arranged at the bottom of the mounting frame, a rotating block is rotatably arranged in the interior of each of the mounting seats, an electric telescopic rod is arranged at the bottom end of each of the rotating blocks, a rectangular plate is rotatably arranged at the telescopic ends of the two cooperating electric telescopic rods, and a rotating plate is rotatably arranged between the two adjacent rectangular plates.

[0013] Optionally, a through hole matched with the liquid injection head is arranged at the central position in the interior of the rotating plate, a circular groove is arranged at each of the two ends in the interior of the rotating plate, and a first connecting end and a second connecting end are respectively arranged at the two side walls of the rotating plate and communicated with one of the circular grooves.

[0014] Optionally, two second sliding grooves are arranged in the inner wall of the other circular groove, a second sliding block is arranged in the interior of each of the second sliding grooves, and a moving sleeve is arranged at one end of the two second sliding blocks away from the second sliding grooves.

[0015] Optionally, a circular ring is rotatably arranged at one end of the moving sleeve, a gear ring is arranged at one end of the circular ring away from the moving sleeve, a hexagonal through groove is arranged in the interior of the gear ring, a driving motor is arranged in the interior of one of the second sliding blocks, and a gear engaged with the gear ring is arranged at the output end of the driving motor.

[0016] The beneficial effects of the application are as follows:

[0017] 1. In the application, after the liquid injection operation of multiple liquid injection heads on the lithium battery is completed, a small amount of liquid attached to the surface of the liquid injection head can be automatically removed by the related cleaning mechanism, avoiding the small amount of liquid from dripping down when multiple liquid injection heads are waiting for the next shell to rotate to the specified position, causing pollution to the components placed below, even affecting the use of other components below, facilitating the use of people, and ensuring that the liquid injection equipment can better facilitate the production and preparation of lithium batteries.

[0018] 2. In the application, during the use of the liquid injection head, if the pressure of the liquid entering the inside of the liquid injection head is too large, the liquid injection head will deform under the pressure, and the deformed liquid injection head can be automatically corrected by the cooperation of the multiple components of the cleaning mechanism, facilitating the use of the subsequent liquid injection head.

[0019] 3. In the application, the gear ring can rotate at one end of the moving sleeve, and when the liquid injection head needs to be disassembled, the automatic disassembly of the liquid injection head can be completed by the cooperation between the gear ring and other components; and when the liquid injection head needs to be installed at the bottom end of the mounting bracket, the liquid injection head can be rotated with the gear ring, so that the threaded part at the top end of the liquid injection head can be screwed into the corresponding threaded hole, thereby completing the automatic installation of the liquid injection head, facilitating the disassembly and assembly of the liquid injection head.

[0020] 4. In the application, after the liquid injection work of the equipment on the lithium battery is completed and the surface cleaning and maintenance of the liquid injection head are completed, the rotating plate below can be controlled to rotate and adjust, and the other circular groove sleeve of the rotating plate can be fitted on the surface of the corresponding liquid injection head by the cooperation of the corresponding four electric telescopic rods, the air bag inside the moving sleeve can be inflated to tightly abut against the surface of the corresponding liquid injection head, thereby sealing the liquid injection head in the corresponding circular groove, facilitating the protection of the liquid injection head when not in use, avoiding the problem that the liquid injection head is exposed to the outside when not in use and is easily affected by external factors, and prolonging the service life of the liquid injection head. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to facilitate the understanding of those skilled in the art, the application will be further described below with reference to the accompanying drawings.

[0022] Figure 1 The overall structure of the high-efficiency and safe liquid injection equipment for lithium battery preparation is shown in the application.

[0023] Figure 2 The Figure 1 Another angle structure diagram;

[0024] Figure 3 The structure diagram of the top of the rotating disc in the application;

[0025] Figure 4It is the structure schematic view of the box in the application;

[0026] Figure 5 It is the structure schematic view of the box in the application;

[0027] Figure 6 It is the structure sectional view of the box in the application;

[0028] Figure 7 It is the structure schematic view of the box in the application;

[0029] Figure 8 It is the structure schematic view of the box in the application;

[0030] Figure 9 It is the structure schematic view of the box in the application;

[0031] Figure 10 It is the structure schematic view of the box in the application;

[0032] Figure 11 It is the structure schematic view of the box in the application;

[0033] Figure 12 It is the structure sectional view of the box in the application;

[0034] Figure 13 It is the structure schematic view of the box in the application.

[0035] In the figure: 1, base; 2, rotating disc; 3, shell; 4, box; 5, moving frame; 6, top plate; 7, electric push rod; 8, mounting frame; 9, liquid injection head; 10, telescopic cylinder; 11, electromagnet; 12, first sliding groove; 13, box; 14, cover plate; 15, clamping plate; 16, first sliding block; 17, spring; 18, rubber block; 19, placing plate; 20, double-headed screw; 21, electric telescopic rod; 22, rectangular plate; 23, rotating plate; 24, mounting seat; 25, threaded part; 26, driving end; 27, rotating block; 28, through hole; 29, circular groove; 30, first connecting end; 31, second connecting end; 32, second sliding groove; 33, second sliding block; 34, moving sleeve; 35, air bag; 36, circular ring; 37, gear ring; 38, through groove; 39, gear. DETAILED DESCRIPTION

[0036] The technical solutions of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0037] Reference Figures 1-13 A high-efficiency and safe liquid injection device for lithium battery manufacturing includes a base 1, a turntable 2 rotatably mounted on the top of the base 1, multiple housings 3 mounted on the top of the turntable 2, each housing 3 containing a box 4, each box 4 containing multiple placement boxes 13, and each placement box 13 containing a limiting mechanism for fixing and positioning the lithium battery. A movable frame 5 is connected to one outer wall of the base 1 via two telescopic cylinders 10. A top plate 6 is mounted on the top of the movable frame 5, and an electric push rod 7 is mounted on the top of the top plate 6. The telescopic end of the electric push rod 7 passes through the top plate 6 and connects to a mounting frame 8. Multiple injection heads 9 are located at the bottom of the mounting frame 8, and multiple cleaning mechanisms for automatically cleaning the surfaces of the injection heads 9 are located at the bottom of the mounting frame 8 and near the injection heads 9. A first driving device is pre-installed inside the base 1, and the output end of the first driving device is connected to the rotating part of the turntable 2, thereby enabling the turntable 2 to rotate and adjust on the top of the base 1.

[0038] As a technical optimization of the present invention, two electromagnets 11 are installed on the inner bottom surface of each of the multiple housings 3, and the bottom ends of the multiple boxes 4 are magnetically fixed to the two electromagnets 11 adjacent to them. After the box 4 is placed inside the housing 3, the two electromagnets 11 generate magnetism by being energized, which can magnetically fix the box 4 and prevent the box 4 from continuing to move inside the housing 3.

[0039] As a technical optimization of the present invention, multiple first sliding grooves 12 are provided inside both sides of multiple boxes 4, and first sliders 16 are installed inside each of the multiple first sliding grooves 12. The outer walls of both sides of multiple placement boxes 13 are connected to two adjacent first sliders 16. A first linear motor is preset inside each of the multiple first sliding grooves 12. The multiple first linear motors can drive the multiple first sliders 16 to move up and down inside the corresponding first sliding grooves 12. This allows the placement boxes 13 to move up and down simultaneously as the two corresponding first sliders 16 move and adjust inside the first sliding grooves 12.

[0040] As a technical optimization of the present invention, the limiting mechanism includes two grooves opened inside the placement box 13, and a double-ended screw 20 is rotatably installed inside the two grooves. Two clamping plates 15 are threadedly installed on the outer walls of the two double-ended screws 20. A placement plate 19 is installed inside the placement box 13, and a weighing sensor is preset inside the placement plate 19. Two second drive motors are pre-installed inside the placement box 13. The output ends of the two second drive motors are respectively connected to one end of two double-headed screws 20, thereby driving the two double-headed screws 20 to rotate inside the corresponding grooves. While rotating, the two double-headed screws 20 can drive the two clamping plates 15 to move towards or away from each other for adjustment. When the two clamping plates 15 move towards each other, they can clamp and limit the lithium battery placed on top of the placement plate 19 to prevent the lithium battery from shaking during the liquid injection process. The weighing sensor installed inside the placement plate 19 can detect the mass of the solution injected into the lithium battery in real time to ensure that the mass of the solution injected into multiple lithium batteries is consistent. The weighing sensor is the ZEMIC Zhonghang Electromechanical Measurement L6D weighing sensor in the prior art.

[0041] As a technical optimization of the present invention, a cover plate 14 is rotatably installed on the top of the housing 4, and a rubber block 18 is connected to the top of the cover plate 14 by a spring 17. A third driving device is preset on one side of the outer wall of the housing 4, and the output end of the third driving device is connected to the rotating part of one end of the cover plate 14, thereby driving the cover plate 14 to rotate and adjust on the top of the housing 4.

[0042] As a technical optimization of the present invention, each of the multiple injection heads 9 has a threaded portion 25 installed at its top end, and the multiple injection heads 9 are threadedly connected to the bottom end of the mounting bracket 8 through the threaded portion 25 at their top ends. Each of the multiple injection heads 9 has a hexagonal drive end 26 at one end near the threaded portion 25. When it is necessary to disassemble or assemble the injection head 9, the drive end 26 can be rotated in both directions using a wrench or other tools.

[0043] As a technical optimization of the present invention, the cleaning mechanism includes multiple mounting seats 24 disposed at the bottom of the mounting frame 8. Rotating blocks 27 are rotatably mounted inside each mounting seat 24. Electric telescopic rods 21 are mounted at the bottom ends of each rotating block 27. Rectangular plates 22 are rotatably mounted on the telescopic ends of two cooperating electric telescopic rods 21. A rotating plate 23 is rotatably mounted between two adjacent rectangular plates 22. A fourth driving device is pre-installed on one outer wall of each mounting seat 24. The output ends of each fourth driving device are connected to the rotating parts of the adjacent rotating blocks 27, thereby enabling the rotating blocks 27 to rotate and adjust within their respective mounting seats 24. Furthermore, a fifth driving device is pre-installed on one side of each of the rectangular plates 22. The output ends of each fifth driving device are connected to the rotating parts of the corresponding rotating plates 23, thereby enabling the rotating plates 23 to rotate and adjust between the corresponding two rectangular plates 22.

[0044] As a technical optimization of the present invention, a through hole 28 adapted to the injection head 9 is provided in the center of the interior of the rotating plate 23. Circular grooves 29 are provided at both ends of the interior of the rotating plate 23. A first connecting end 30 and a second connecting end 31, communicating with one of the circular grooves 29, are respectively installed on the outer walls of both sides of the rotating plate 23. An infusion device and a suction device are pre-installed outside the device. The infusion device and the suction device are connected to the first connecting end 30 and the second connecting end 31 via a first hose and a second hose, respectively. This allows the infusion device to deliver the relevant cleaning liquid into the interior of one of the circular grooves 29, and the suction device to extract the cleaning liquid from the interior of one of the circular grooves 29. The diameter of the through hole 28 is larger than the diameter shown in the attached figure, and a sponge pad is installed on the inner wall of the through hole 28, with the inner wall of the sponge pad abutting against the outer wall of the injection head 9.

[0045] As a technical optimization of the present invention, two second sliding grooves 32 are formed on the inner wall of another circular groove 29. A second slider 33 is installed inside each of the two second sliding grooves 32. A movable sleeve 34 is installed at the end of each of the two second sliders 33 away from the second sliding groove 32. An airbag 35 is installed on the inner wall of the movable sleeve 34. A second linear motor is pre-installed inside each of the two second sliding grooves 32. The two second linear motors can drive the two second sliders 33 to move and adjust within their respective second sliding grooves 32, thereby causing the movable sleeve 34 to move back and forth within the other circular groove 29. An inflation device is pre-installed inside the other circular groove 29. The inflation device can inflate the airbag 35, causing the airbag 35 to inflate and expand inside the movable sleeve 34 during use.

[0046] As a technical optimization of the present invention, a ring 36 is rotatably mounted on one end of the movable sleeve 34, and a toothed ring 37 is mounted on the end of the ring 36 away from the movable sleeve 34. A hexagonal through groove 38 is formed inside the toothed ring 37. A drive motor is installed inside one of the second sliders 33, and a gear 39 meshing with the toothed ring 37 is mounted on the output end of the drive motor. After the drive motor is started, it can drive the gear 39 to rotate, so that the toothed ring 37 and the ring 36 meshing with the gear 39 can rotate synchronously at one end of the movable sleeve 34.

[0047] In this invention, when the user uses the device, such as Figure 1 and Figure 3 As shown, a lithium battery loading robot, a unloading robot, and a box 4 loading robot are respectively set on the left, right, and front of the equipment. The box 4 loading robot located at the front of the equipment automatically places the box 4 into the corresponding housing 3 and fixes it magnetically with the help of two electromagnets 11. The turntable 2 is controlled to rotate 90 degrees clockwise, so that the first housing 3 containing the box 4 rotates to the left end, and the second housing 3 rotates to the front. The box 4 loading robot continues to place the second box 4 into the second housing 3. At this time, the lithium battery loading robot places multiple lithium batteries into the corresponding placement boxes 13 and controls the limiting mechanism inside the multiple placement boxes 13 to limit the lithium batteries. With the position fixed, the turntable 2 is then rotated 90 degrees clockwise, causing the first housing 3 and box 4 to rotate below the multiple injection heads 9. The downward extension of the telescopic end of the electric push rod 7 drives the multiple injection heads 9 into the corresponding lithium batteries for injection. After the injection heads 9 have injected liquid into the multiple lithium batteries inside the first box 4, the turntable 2 is rotated 90 degrees clockwise, causing the first housing 3 and box 4 to rotate to the right end of the equipment. A material unloading robot then removes the first box 4 from inside the housing 3. The same steps are repeated for the other boxes 4, achieving continuous injection of liquid into a large batch of lithium batteries, thus improving the efficiency of large-scale lithium battery injection.

[0048] After multiple injection heads 9 inject liquid into the corresponding lithium batteries, the weight sensor inside the placement plate 19 can detect the quality of the injected liquid in real time to ensure consistent quality. After the turntable 2 rotates the injected lithium batteries to the right, the cover plates 14 on the top of the multiple placement boxes 13 can be controlled to rotate to the top of the corresponding lithium batteries. After the cover plates 14 rotate to a horizontal position on the top of the placement box 13, the springs 17 and rubber blocks 18 on the top of the cover plates 14 rotate to the inside of the placement box 13. The rubber blocks 18, with their own elasticity and the elasticity of the springs 17, can abut against the top of the lithium batteries, thereby sealing the top opening of the lithium batteries. This prevents the liquid inside the lithium batteries from leaking from the top opening during the subsequent unloading process of the unloading robot in the box 4, thus improving the safety of the lithium battery injection process.

[0049] At the same time, after the lithium battery is filled with liquid, the control cover 14 is placed on the top of the placement box 13. This can also promptly seal and isolate any accidental leakage of liquid into the placement box 13 due to the quality problems of the lithium battery itself after the liquid is injected into the lithium battery, thus preventing the liquid from evaporating in the working area of ​​the equipment and causing pollution to the working area of ​​the equipment.

[0050] Furthermore, after the liquid leaks inside the placement box 13, the weighing sensor will detect the deviation in the lithium battery mass in real time and transmit the relevant data to the controller. The controller will control the first sliders 16 on both sides of the placement box 13 to slide upward together inside the corresponding first slide grooves 12, thereby causing the placement box 13 to move upward and extend inside the box body 4. After the unloading robot unloads the box body 4, the staff or the preset visual inspection equipment will promptly discover the problematic placement box 13, so that the staff can deal with it in time and prevent the accident from worsening.

[0051] After the multiple injection heads 9 inject liquid into the corresponding lithium batteries, the telescopic end of the electric push rod 7 will retract upwards to reset, causing the multiple injection heads 9 to move upwards and reset, waiting for the turntable 2 to rotate the next housing 3 and box 4 to rotate below the multiple injection heads 9 to continue the injection operation. During the idle time when the multiple injection heads 9 are waiting for the next housing 3 to rotate, the telescopic ends of the multiple electric telescopic rods 21 can be controlled to extend downwards together, causing the multiple rectangular plates 22 and rotating plates 23 to move downwards together. This allows the sponge pads set inside the multiple rotating plates 23 to wipe away the liquid on the surface of the multiple injection heads 9, preventing a small amount of liquid from dripping downwards when the multiple injection heads 9 are waiting for the next housing 3 to rotate to the designated position, which could cause contamination to the components such as the box 13 placed below.

[0052] If the pressure of the liquid entering the injection head 9 is too high during use, causing the injection head 9 to bend under high pressure, and if a slight deformation of the injection head 9 is found but it is not possible to replace the deformed injection head 9 in time, if the injection head 9 is bent laterally, the extension and retraction of the extension ends of the four corresponding electric telescopic rods 21 can be controlled to move the rotating plate 23 to a position close to the bend of the injection head 9. Then, the rotating plate 23 corresponding to the injection head 9 can be controlled to rotate in the opposite direction to the bend of the injection head 9, so that the bending of the injection head 9 can be corrected.

[0053] If the injection head 9 is bent longitudinally, the extension and retraction of the corresponding four electric telescopic rods 21 can be controlled to move the rotating plate 23 to a position close to the bent position of the injection head 9. Then, multiple rotating blocks 27 can be controlled to rotate and adjust inside the corresponding mounting base 24, thereby driving the two rectangular plates 22 and the rotating plate 23 to rotate and adjust longitudinally, thus correcting the longitudinal bending of the injection head 9.

[0054] If the injection head 9 is bent in a direction that is neither horizontal nor vertical, the telescopic ends of the two telescopic cylinders 10 can be controlled to extend together, pushing the moving frame 5 and multiple injection heads 9 to move away from the turntable 2. Then, the telescopic ends of the corresponding four electric telescopic rods 21 can be controlled to extend downward together, causing the two rectangular plates 22 and the rotating plate 23 to move downward to below the injection head 9. Then, the rotating plate 23 can be controlled to rotate 90 degrees counterclockwise between the two rectangular plates 22, so that another circular groove 29 rotates to directly below the injection head 9. Then, the telescopic ends of the four electric telescopic rods 21 can be controlled to retract together, causing the other circular groove 29 to fit onto the surface of the injection head 9. Finally, the two second sliders 33 can be controlled to extend downward together. The two slides move upward together inside the corresponding second slide groove 32, causing the through groove 38 inside the toothed ring 37 to be fitted onto the surface of the drive end 26. As the drive motor drives the gear 39 and the toothed ring 37 to rotate, the drive end 26 can drive the injection head 9 to rotate and adjust. After the bent part of the injection head 9 is rotated to a horizontal or vertical state, the two second sliders 33 are controlled to drive the moving sleeve 34 and the toothed ring 37 to move downward and reset inside another circular groove 29. The four electric telescopic rods 21 and the rotating plate 23 are also controlled to reset, causing the rotating plate 23 to be refitted onto the surface of the injection head 9. With the above correction method, the bent part of the injection head 9 is corrected, which facilitates the subsequent use of the injection head 9.

[0055] Since the gear ring 37 can rotate at one end of the movable sleeve 34, when the injection head 9 needs to be disassembled, the steps described above—where the internal through groove 38 of the gear ring 37 is fitted onto the surface of the drive end 26 and the gear 39 drives the gear ring 37 to rotate—can be repeated. This causes the drive end 26 and the injection head 9 to rotate, so that the threaded part 25 at the top of the injection head 9 is unscrewed from the bottom end of the mounting bracket 8 and falls into the interior of another circular groove 29, thus completing the automatic disassembly of the injection head 9. When it is necessary to install the injection head 9 at the bottom end of the mounting bracket 8, the telescopic ends of the four electric telescopic rods 21 extend downward together. The rotating plate 23 is controlled to rotate vertically on the two corresponding rectangular plates 22. Then, the injection head 9 is placed inside another circular groove 29, and the drive end 26 is placed in the through groove 38 inside the toothed ring 37. The telescopic ends of the four electric telescopic rods 21 are controlled to retract together, which moves the threaded part 25 at the top of the injection head 9 to the threaded hole at the bottom of the mounting bracket 8. As the toothed ring 37 drives the injection head 9 to rotate, the threaded part 25 at the top of the injection head 9 can be threaded into the corresponding threaded hole, thus completing the automatic installation of the injection head 9 and facilitating the disassembly and assembly of the injection head 9.

[0056] After use, if cleaning and disinfection of the injection head 9 is required, the telescopic ends of the four corresponding electric telescopic rods 21 can be controlled to extend downwards together, and the rotating plate 23 can be controlled to rotate and adjust between the two corresponding rectangular plates 22. This causes one of the circular grooves 29 of the rotating plate 23 to rotate directly below the injection head 9. As the telescopic ends of the four electric telescopic rods 21 retract, one of the circular grooves 29 is fitted onto the surface of the injection head 9. The externally preset infusion device is then controlled to deliver the cleaning and disinfecting liquid into the interior of one of the circular grooves 29, allowing the injection head 9 to be quickly immersed. The cleaning and disinfection process does not require removing the injection head 9 from the bottom of the mounting bracket 8 and then performing any related treatments on the injection head 9. After the injection head 9 has been soaked and cleaned and disinfected, the externally preset liquid extraction device can be controlled to extract the liquid from one of the circular grooves 29, and the telescopic ends of the four electric telescopic rods 21 can be controlled to extend downwards again. Then, after the rotating plate 23 is rotated to a horizontal position, the telescopic ends of the four electric telescopic rods 21 retract upwards, which can drive the sponge pad set inside the rotating plate 23 to automatically wipe and clean the outer wall of the injection head 9, making it convenient for subsequent use of the injection head 9.

[0057] After the equipment completes the lithium battery electrolyte filling process and the surface of the filling head 9 is cleaned and maintained, the telescopic ends of the two telescopic cylinders 10 are first controlled to extend together. Then, the telescopic ends of the multiple electric telescopic rods 21 are controlled to extend downward together, so that the multiple rotating plates 23 move downward to below the multiple filling heads 9. Then, the end of the multiple rotating plates 23 with another circular groove 29 is controlled to rotate upward to a vertical state, and the moving sleeves 34 inside the other circular groove 29 are controlled to move upward to the opening of the circular groove 29. Finally, the telescopic ends of the multiple electric telescopic rods 21 are controlled to extend. When the plates retract and return to their original positions, another circular groove 29 of the multiple rotating plates 23 is fitted onto the surface of the corresponding injection head 9. The multiple movable sleeves 34 are close to the drive end 26 of the injection head 9, and the air bladders 35 inside the multiple movable sleeves 34 are inflated and expanded, so that they are tightly abutted against the surface of the corresponding injection head 9. This can seal the multiple injection heads 9 inside the corresponding circular grooves 29, which is convenient for protecting the injection heads 9 when not in use. This prevents the injection heads 9 from being exposed to the outside when not in use and from being easily affected by external factors, thus extending the service life of the injection heads 9.

[0058] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-efficiency and safe liquid injection device for lithium battery manufacturing, comprising a base (1), characterized in that, A turntable (2) is rotatably mounted on the top of the base (1). Multiple housings (3) are mounted on the top of the turntable (2). Each housing (3) contains a box (4). Each box (4) contains multiple placement boxes (13). Each placement box (13) is equipped with a limiting mechanism for limiting and fixing the lithium battery. A movable frame (5) is connected to one side of the outer wall of the base (1) via two telescopic cylinders (10). A top plate (6) is mounted on the top of the movable frame (5). An electric push rod (7) is mounted on the top of the top plate (6). The telescopic end of the electric push rod (7) passes through the top plate (6) and is connected to a mounting frame (8). Multiple injection heads (9) are provided at the bottom of the mounting frame (8). Multiple cleaning mechanisms for automatically cleaning the surface of the injection heads (9) are provided at the bottom of the mounting frame (8) and close to the injection heads (9). The cleaning mechanism includes multiple mounting seats (24) provided at the bottom of the mounting frame (8). Rotating blocks (27) are rotatably installed inside each of the multiple mounting seats (24). Electric telescopic rods (21) are installed at the bottom of each of the multiple rotating blocks (27). Rectangular plates (22) are rotatably installed at the telescopic ends of two cooperating electric telescopic rods (21). Rotating plates (23) are rotatably installed between two adjacent rectangular plates (22). The rotating plate (23) has a through hole (28) in the center of its interior that is compatible with the injection head (9). Both ends of the rotating plate (23) have circular grooves (29). The outer walls of the two sides of the rotating plate (23) are respectively equipped with a first connecting end (30) and a second connecting end (31) that communicate with one of the circular grooves (29). The first connecting end (30) and the second connecting end (31) are respectively connected to the externally preset infusion device and the liquid extraction device through the first hose and the second hose. The infusion device can deliver the cleaning liquid to the interior of one of the circular grooves (29), and the liquid extraction device can extract the cleaning liquid from the interior of one of the circular grooves (29). The inner wall of the through hole (28) is equipped with a sponge pad, and the inner wall of the sponge pad abuts against the outer wall of the injection head (9).

2. The high-efficiency and safe liquid injection device for lithium battery manufacturing according to claim 1, characterized in that, Two electromagnets (11) are installed on the inner bottom surface of each of the multiple housings (3), and the bottom ends of the multiple boxes (4) are magnetically fixed to the two electromagnets (11) that are close to them.

3. The high-efficiency and safe liquid injection device for lithium battery manufacturing according to claim 1, characterized in that, Multiple first sliding grooves (12) are provided inside both sides of the multiple boxes (4), and a first slider (16) is installed inside the multiple first sliding grooves (12). The outer walls of both sides of the multiple placement boxes (13) are connected to the two first sliders (16) that are close to each other.

4. The high-efficiency and safe liquid injection device for lithium battery manufacturing according to claim 1, characterized in that, The limiting mechanism includes two grooves inside the placement box (13), and a double-headed screw (20) is rotatably installed inside each of the two grooves. Two clamping plates (15) are threaded on the outer walls of the two double-headed screws (20). A placement plate (19) is installed inside the placement box (13), and a weighing sensor is preset inside the placement plate (19).

5. The high-efficiency and safe liquid injection device for lithium battery manufacturing according to claim 4, characterized in that, The top of the box (4) is rotatably mounted with a cover plate (14), and the top of the cover plate (14) is connected to a rubber block (18) by a spring (17).

6. The high-efficiency and safe liquid injection device for lithium battery manufacturing according to claim 1, characterized in that, Each of the multiple injection heads (9) has a threaded portion (25) installed at its top end. The multiple injection heads (9) are threaded to the bottom end of the mounting bracket (8) through the threaded portion (25) at their top ends. Each of the multiple injection heads (9) has a hexagonal drive end (26) near the threaded portion (25).

7. The high-efficiency and safe liquid injection device for lithium battery manufacturing according to claim 1, characterized in that, The inner wall of the other circular groove (29) has two second sliding grooves (32), and a second slider (33) is installed inside each of the two second sliding grooves (32). A movable sleeve (34) is installed at the end of the two second sliders (33) away from the second sliding groove (32), and an airbag (35) is installed on the inner wall of the movable sleeve (34).

8. The high-efficiency and safe liquid injection device for lithium battery manufacturing according to claim 7, characterized in that, One end of the movable sleeve (34) is rotatably mounted with a ring (36), and the end of the ring (36) away from the movable sleeve (34) is mounted with a toothed ring (37). The toothed ring (37) has a hexagonal through groove (38) inside. One of the second sliders (33) is equipped with a drive motor inside, and the output end of the drive motor is equipped with a gear (39) that meshes with the toothed ring (37).

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