Automatic liquid injection equipment for lithium battery

Abstract

The utility model relates to lithium battery production equipment technical field, concretely is a kind of lithium battery automatic liquid injection equipment, to solve the technical problem of low efficiency, poor precision and insufficient fixed stability of traditional liquid injection mode. The equipment is through workstation to bear rotating disc type structure, rotating disc sets up multiple support blocks, each support block is configured double strip slot limiting structure, spring support plate is arranged in groove and realizes vertical buffering, and horizontal sliding transverse plate is formed horizontal clamping by tension spring and triangular block cooperation. Liquid supply system includes electrolyte tank, liquid injection pump and vertical lifting mechanism, and the tapered sealing butt joint of liquid injection head and lithium battery liquid injection port is realized by electric push rod driving sliding plate and driving containing box. Equipment adopts servo motor to drive rotating disc to rotate intermittently, and matches liquid injection station conversion. The utility model realizes electrolyte quantitative injection by automatic process, and the multidirectional constraint structure of limiting assembly effectively prevents liquid injection displacement, and significantly improves production efficiency and liquid injection consistency.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to an automatic lithium battery electrolyte filling device. Background Technology

[0002] In the production process of lithium batteries, electrolyte injection is a crucial step, and its efficiency and precision directly affect the performance and production cost of the lithium batteries. Traditional lithium battery electrolyte injection methods mostly rely on manual operation or semi-automated equipment, which is not only inefficient but also makes it difficult to guarantee the accuracy and consistency of the electrolyte injection. In addition, traditional electrolyte injection methods are often complex to operate when fixing lithium batteries, and the fixing effect is unstable, which can easily lead to the displacement of lithium batteries during the electrolyte injection process, thus affecting the quality of the electrolyte injection. With the rapid development of the lithium battery industry, the requirements for electrolyte injection equipment are also increasing, and there is an urgent need for efficient, accurate, and stable automated electrolyte injection equipment to meet production needs. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing lithium battery electrolyte injection methods, which often rely on manual operation or semi-automatic equipment, resulting in low efficiency and difficulty in ensuring the accuracy and consistency of the electrolyte injection. Furthermore, traditional electrolyte injection methods are often complex to operate when fixing the lithium battery, and the fixing effect is unstable, easily leading to displacement of the lithium battery during the injection process, thus affecting the quality of the electrolyte injection. Therefore, this invention proposes an automatic lithium battery electrolyte injection device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An automatic lithium battery filling device includes a worktable with a rotating disk rotatably connected to its top. A plurality of support blocks are fixedly connected to the top of the rotating disk, and a limit component is provided on the top of the support blocks.

[0006] Multiple lithium battery bodies are fixed to the top of the support block by the limiting component;

[0007] The liquid supply assembly includes an electrolyte tank fixed to the top of the workbench, a liquid injection pump fixed to the inner wall of the protective cover, an inlet pipe connected to the inlet end of the liquid injection pump, and an outlet pipe connected to the outlet end of the liquid injection pump.

[0008] The injection pump draws electrolyte from the electrolyte tank through the inlet pipe, delivers it to the injection head through the outlet pipe, and finally injects it into the lithium battery body fixed by the limiting component.

[0009] In one possible design, the limiting component includes:

[0010] Two symmetrical strip-shaped grooves are formed on the top of the support block, and the strip-shaped grooves match the outer contour of the lithium battery body;

[0011] A rectangular groove is formed on the inner wall of the bottom of a strip groove, and a support plate is slidably connected inside it. The bottom of the support plate is elastically connected to the bottom of the rectangular groove by a spring.

[0012] A strip-shaped transverse groove extends laterally through two strip-shaped grooves and connects to a strip-shaped hole. Two sliding transverse plates are slidably connected inside, and the sliding transverse plates are elastically connected laterally by a tension spring.

[0013] When the lithium battery body is placed on the support plate, the spring is compressed to generate a vertical constraint force, and the sliding cross plate achieves horizontal clamping through the cooperation of the triangular block and the inclined surface of the sliding pressure plate.

[0014] In one possible design, a rubber pad is fixedly connected to the clamping surface of the sliding cross plate. The surface of the rubber pad is provided with anti-slip texture. When the sliding cross plate is closed by the action of a tension spring, the rubber pad forms elastic contact with the side wall of the lithium battery body.

[0015] In one possible design, the liquid supply assembly further includes:

[0016] The sliding plate is vertically guided to the inner wall of the protective cover via a sliding groove.

[0017] The container is fixed to the end of the sliding plate, with the top connected to the liquid outlet pipe and the bottom equipped with a liquid injection head corresponding to the lithium battery body.

[0018] An electric push rod, whose piston rod is driven to the sliding plate, is used to drive the container to move vertically up and down;

[0019] The electric push rod drives the receiving box to move down via a sliding plate, so that the injection head is inserted into the injection port of the lithium battery body and the injection pump is started.

[0020] In one possible design, the injection head adopts a conical sealing structure with an O-ring on its outer wall. When the injection head is inserted into the injection port of the lithium battery body, the sealing ring achieves a sealed connection of the injection channel.

[0021] In one possible design, the turntable is driven by a servo motor to achieve intermittent rotation, with each rotation angle matching the spacing of the support blocks, used to sequentially transfer the lithium battery body to be injected to the injection station.

[0022] In one possible design, the device also includes a negative pressure generating device, which is connected to the container via a pipeline to apply negative pressure inside the lithium battery body during the electrolyte injection process, thereby accelerating electrolyte penetration.

[0023] In one possible design, the electrolyte tank is equipped with a liquid level monitoring device. When the electrolyte level is lower than a threshold, the control module stops the injection pump and triggers an alarm.

[0024] In one possible design, a position sensor is provided on the top of the support block. When the lithium battery body is placed in the strip groove, the position sensor triggers the locking mechanism of the rotating disk to prevent the support block from shifting during the liquid injection process.

[0025] In this application, during use, multiple lithium battery bodies are placed inside the strip-shaped groove and supported by a support plate. The electric push rod is activated, and the output shaft of the electric push rod drives the sliding plate to move down. The sliding plate drives the receiving box to move down, and the receiving box drives multiple injection heads to move down. The injection heads cooperate with the lithium battery bodies, and the injection pump is activated. The injection pump draws out the electrolyte through the inlet pipe, and then discharges it into the receiving box through the outlet pipe. The injection operation is then completed through the injection head.

[0026] During the liquid injection process, the lithium battery body squeezes the support plate, which enters the rectangular groove and compresses the spring. The lithium battery body is limited by the rectangular groove, thus ensuring its stability. The receiving box also squeezes the sliding pressure plate, which causes two triangular blocks to move away from each other. The triangular blocks cause the sliding horizontal plate to move laterally, stretching the tension spring. The sliding horizontal plate and the rubber pad squeeze the lithium battery body and brake it again from the side, thus ensuring the stability of the lithium battery body and making it convenient to use.

[0027] Beneficial effects:

[0028] This invention achieves rapid and accurate electrolyte filling of lithium batteries through an automated electrolyte filling design. An electric push rod drives the receiving box to move vertically, allowing the filling head to quickly align with the lithium battery's filling port, significantly shortening the filling cycle and improving production efficiency.

[0029] The electrolyte injection pump precisely draws electrolyte through the inlet pipe and delivers it to the injection head through the outlet pipe, ultimately injecting it into the lithium battery body. During this process, both the electrolyte flow rate and injection time can be precisely controlled, ensuring the accuracy of the injected volume and improving the consistency of the lithium battery.

[0030] The design of the limiting components ensures the stability of the lithium battery during the liquid injection process. The support plate uses springs to provide vertical cushioning and support, while the sliding cross plate and rubber pads clamp the lithium battery horizontally, effectively preventing displacement of the lithium battery during liquid injection and improving the stability of the equipment.

[0031] The entire liquid injection process is highly automated; operators only need to place the lithium battery in the strip-shaped tank, and the equipment can automatically complete the liquid injection operation. At the same time, the equipment has a compact structure and is easy to maintain, reducing operational difficulty and maintenance costs. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural schematic diagram of an automatic lithium battery liquid injection device proposed in this utility model;

[0033] Figure 2 This is a three-dimensional structural diagram of an automatic lithium battery filling device with the protective cover removed, as proposed in this utility model.

[0034] Figure 3 This is a three-dimensional structural diagram of the support block in an automatic lithium battery liquid injection device proposed in this utility model;

[0035] Figure 4 This is an exploded view of the support block in an automatic lithium battery liquid injection device proposed in this utility model.

[0036] In the diagram: 1. Workbench; 2. Protective cover; 3. Support block; 4. Container box; 5. Electrolyte tank; 6. Electric push rod; 7. Fixing plate; 8. Slide groove; 9. Sliding plate; 10. Rotating disk; 11. Inlet pipe; 12. Injection pump; 13. Outlet pipe; 14. Injection head; 15. Strip groove; 16. Lithium battery body; 17. Sliding pressure plate; 18. Strip horizontal groove; 19. Rectangular groove; 20. Tension spring; 21. Spring; 22. Support plate; 23. Rubber pad; 24. Sliding horizontal plate; 25. Triangular block; 26. Strip hole. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0038] Example 1

[0039] Reference Figure 1-4A liquid injection device includes: a workbench 1, a protective cover 2 fixedly connected to the top of the workbench 1, a rotating disk 10 rotatably connected to the top of the workbench 1, and multiple support blocks 3 fixedly connected to the top of the rotating disk 10. A limiting component is provided on the top of each support block 3, the limiting component including two symmetrically arranged strip grooves 15 on the top of the support block 3, the strip grooves 15 cooperating with a lithium battery body 16, and multiple rectangular grooves 19 formed on the bottom inner wall of the strip grooves 15, with a common support slidably connected between the inner walls of the two sides of the rectangular grooves 19. The support plate 22 has two symmetrically arranged springs 21 fixedly connected between its bottom and the bottom inner wall of the rectangular groove 19. The support plate 22 is used to support the lithium battery body 16. The top of the support block 3 has a strip hole 26. The two strip grooves 15 have a connected strip transverse groove 18. The strip transverse groove 18 is located below the strip hole 26 and is connected to the strip hole 26. A sliding pressure plate 17 is slidably connected inside the strip hole 26. Two symmetrically arranged sliding transverse plates are slidably connected to the bottom inner wall of the strip transverse groove 18. 24. Triangular blocks 25 are fixedly connected to the sides of the two sliding horizontal plates 24 that are close to each other. The inclined surfaces of the triangular blocks 25 abut against the bottom of the sliding pressure plate 17. Two symmetrically arranged tension springs 20 are fixedly connected between the two sliding horizontal plates 24. During the liquid injection process, the lithium battery body 16 will squeeze the support plate 22. The support plate 22 enters the interior of the rectangular groove 19 and squeezes the spring 21. The lithium battery body 16 is limited by the rectangular groove 19, thus ensuring the stability of the lithium battery body 16. The receiving box 4 will also squeeze the sliding pressure plate 17. The dynamic pressure plate 17 drives the two triangular blocks 25 to move away from each other. The triangular blocks 25 drive the sliding horizontal plate 24 to move laterally. The sliding horizontal plate 24 stretches the tension spring 20. The sliding horizontal plate 24 and the rubber pad 23 will squeeze the lithium battery body 16 and brake the lithium battery body 16 again from the side, thereby ensuring the stability of the lithium battery body 16 and making it easy to use. The stiffness coefficient of the spring 21 is preferably 0.5-5N / mm, and the compression stroke is 10-30mm; the stiffness coefficient of the tension spring 20 is 1-8N / mm, and the preload is 5-20N. When the weight of the lithium battery body 16 is 200-800g, it can ensure a buffering force of 5-15N in the vertical direction and a clamping force of 8-25N in the horizontal direction, while allowing a positional tolerance of ±1mm.

[0040] Multiple lithium battery bodies 16 are placed inside the support block 3 and are limited by the limiting component;

[0041] A fixing plate 7 is fixedly connected to the inner wall of one side of the protective cover 2. A liquid supply assembly for supplying electrolyte to the lithium battery body 16 is provided on the top of the fixing plate 7. The liquid supply assembly includes an injection pump 12 fixedly connected to the top of the fixing plate 7. An electrolyte tank 5 is fixedly connected to the top of the workbench 1. An inlet pipe 11 is fixedly connected to the inlet end of the injection pump 12. One end of the inlet pipe 11 is connected to the electrolyte tank 5, and an outlet pipe 13 is fixedly connected to the outlet end of the inlet pipe 11. A sliding groove 8 is provided on the inner wall of one side of the protective cover 2. A sliding plate 9 is slidably connected inside the sliding groove 8. A receiving box 4 is fixedly connected to one end of the sliding plate 9. The top of the receiving box 4 is connected to the bottom of the outlet pipe 13, and multiple injection heads 14 are fixedly connected to the bottom of the receiving box 4. The multiple injection heads 14 are respectively connected to multiple... The lithium battery body 16 is used in conjunction with the electrolyte. An electric push rod 6 is fixedly connected to the top of the fixed plate 7. The piston rod of the electric push rod 6 slides through the fixed plate 7 and is fixedly connected to one side of the top of the sliding plate 9. Multiple lithium battery bodies 16 are placed inside the strip groove 15 and supported by the support plate 22. The electric push rod 6 is activated, and its output shaft drives the sliding plate 9 downwards. The sliding plate 9 drives the receiving box 4 downwards, which in turn drives multiple injection heads 14 downwards. The injection heads 14 engage with the lithium battery body 16, and the injection pump 12 is activated. The injection pump 12 draws the electrolyte through the inlet pipe 11 and discharges it through the outlet pipe 13 into the receiving box 4. The injection operation is then completed through the injection heads 14. The injection heads 14 can have various shapes.

[0042] Conical sealing structure: As described in the embodiments, the cone angle ranges from 15° to 45°, which can achieve progressive sealing;

[0043] Cylindrical guide structure: diameter tolerance controlled within ±0.1mm, suitable for standardized injection ports;

[0044] Multi-stage stepped structure: It is equipped with 2-3 sealing steps of different diameters to accommodate various sizes of injection ports;

[0045] Spiral guide groove structure: Spiral grooves with a depth of 0.2-0.5mm are opened on the outer surface to accelerate the flow of electrolyte;

[0046] Hemispherical elastic head structure: Made of silicone material, it compensates for the position deviation of the injection port through deformation.

[0047] This application can be used in the field of lithium batteries, or in other fields applicable to this application.

[0048] Example 2

[0049] refer to Figures 1-4An improvement based on Example 1: An automatic lithium battery electrolyte injection device, applied to the field of lithium batteries, is provided. A rubber pad 23 is fixedly connected to one side of the sliding plate 24. The device also includes a negative pressure generating device, which is connected to the receiving box 4 through a pipeline. During the electrolyte injection process, a negative pressure is applied to the inside of the lithium battery body 16 to accelerate the penetration of electrolyte. A liquid level monitoring device is installed inside the electrolyte tank 5. When the electrolyte level is lower than the threshold, the control module stops the injection pump 12 and triggers an alarm. A position sensor is installed on the top of the support block 3. When the lithium battery body 16 is placed in the strip groove 15, the position sensor triggers the locking mechanism of the rotating disk 10 to prevent the support block 3 from shifting during the electrolyte injection process.

[0050] However, as is well known to those skilled in the art, the working principles and wiring methods of the electric actuator 6, the lithium battery body 16, and the injection pump 12 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0051] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0052] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic lithium battery electrolyte filling device, characterized in that, include: The workbench (1) has a rotating disk (10) rotatably connected to its top. The top of the rotating disk (10) is fixedly connected to a plurality of support blocks (3), and the top of the support blocks (3) is provided with a limit component. Multiple lithium battery bodies (16) are fixed to the top of the support block (3) by the limiting component; The liquid supply assembly includes an electrolyte tank (5) fixed to the top of the workbench (1), a protective cover (2) fixed to the top of the workbench (1), an injection pump (12) fixed to the inner wall of the protective cover (2), an inlet pipe (11) connected to the inlet end of the injection pump (12), and an outlet pipe (13) connected to the outlet end of the injection pump (12). The injection pump (12) draws electrolyte from the electrolyte tank (5) through the inlet pipe (11), delivers it to the injection head (14) through the outlet pipe (13), and finally injects it into the lithium battery body (16) fixed by the limiting component.

2. The automatic lithium battery electrolyte filling device according to claim 1, characterized in that, The limiting component includes: Two symmetrically arranged strip grooves (15) are opened on the top of the support block (3), and the strip grooves (15) match the outer contour of the lithium battery body (16); A rectangular groove (19) is formed on the inner wall of the bottom of the strip groove (15), and a support plate (22) is slidably connected inside. The bottom of the support plate (22) and the bottom of the rectangular groove (19) are elastically connected by a spring (21). A strip-shaped transverse groove (18) is formed inside the support block (3) and a strip-shaped hole (26) is formed on the top of the support block (3). The strip-shaped transverse groove (18) extends horizontally through two strip-shaped grooves (15) and connects to the strip-shaped hole (26). Two sliding horizontal plates (24) are slidably connected inside. The sliding horizontal plates (24) are slidably connected by a tension spring (20). A sliding pressure plate (17) slides through the inside of the strip-shaped hole (26). When the lithium battery body (16) is placed on the support plate (22), the spring (21) is compressed to generate a vertical constraint force, and the sliding cross plate (24) achieves horizontal clamping through the cooperation of the triangular block (25) and the inclined surface of the sliding pressure plate (17).

3. The automatic lithium battery electrolyte filling device according to claim 2, characterized in that, The clamping surface of the sliding plate (24) is fixedly connected to a rubber pad (23). The surface of the rubber pad (23) is provided with anti-slip texture. When the sliding plate (24) is closed by the tension spring (20), the rubber pad (23) forms elastic contact with the side wall of the lithium battery body (16).

4. The automatic lithium battery electrolyte filling device according to claim 1, characterized in that, The liquid supply assembly also includes: The sliding plate (9) is vertically guided to the inner wall of the protective cover (2) through the sliding groove (8); The container (4) is fixed to the end of the sliding plate (9), with its top connected to the liquid outlet pipe (13) and its bottom provided with an injection head (14) corresponding to the lithium battery body (16). An electric push rod (6) with its piston rod connected to a sliding plate (9) is used to drive the container (4) to move vertically up and down. The electric push rod (6) drives the container (4) to move down through the sliding plate (9), so that the injection head (14) is inserted into the injection port of the lithium battery body (16) and the injection pump (12) is started.

5. The automatic lithium battery electrolyte filling device according to claim 4, characterized in that, The injection head (14) adopts a conical sealing structure and has an O-ring on its outer wall. When the injection head (14) is inserted into the injection port of the lithium battery body (16), the sealing connection of the injection channel is achieved through the sealing ring.

6. The automatic lithium battery electrolyte filling device according to any one of claims 1-5, characterized in that, The rotating disk (10) is driven by a servo motor to achieve intermittent rotation. Each rotation angle matches the spacing of the support block (3), which is used to transfer the lithium battery body (16) to be injected to the injection station in sequence.

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