A liquid injection device for lithium battery production

Abstract

This utility model relates to the field of lithium battery electrolyte filling technology, specifically to an electrolyte filling device for lithium battery production. It includes a workbench with supporting legs fixedly installed on its lower end face. A clamping mechanism is slidably fitted onto the upper end face of the workbench, and an electrolyte filling mechanism is fixedly installed on the side wall of the workbench. The clamping mechanism includes a limiting groove, a limiting plate, a moving plate, an mounting groove, an abutment pad, an abutment plate, a piston cylinder, a piston assembly, a toothed plate, a lithium battery body, gears, and a first servo motor. The surface of the lithium battery body is vertically slidably fitted within the moving plate. This utility model allows for the simultaneous installation of multiple lithium battery bodies via the moving plate. Through the interaction between the gears and the toothed plate, each unfilled lithium battery body is positioned below the electrolyte filling tube for complete electrolyte filling. After completion, there is no need to wait for the filled lithium battery body to be released from the clamping mechanism before continuing to fill another lithium battery body, thus improving work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery liquid injection technology, specifically to a liquid injection device for lithium battery production. Background Technology

[0002] Lithium batteries can be broadly classified into two categories: lithium metal batteries and lithium-ion batteries. Lithium-ion batteries do not contain metallic lithium and are rechargeable. They offer superior safety, specific capacity, self-discharge rate, and performance-price ratio compared to lithium-ion batteries. However, due to their high technological requirements, only companies in a few countries produce lithium metal batteries.

[0003] CN218334241 U discloses a liquid injection device for lithium battery production. The device has a fixing assembly on its base plate, a liquid infusion hose fixedly connected to the lower surface of the storage tank, a solenoid valve fixedly connected to one end of the liquid infusion hose, a liquid guide tube fixedly connected to the lower surface of the solenoid valve, a liquid filling pipe fixedly connected to the sealing cap, and a one-way valve fixedly connected to the liquid filling pipe. First, the battery is placed on the base plate and clamped by the cooperation of a fixing block and a spring. Then, the electric telescopic rod is activated via the control panel, moving the connecting frame downwards to activate the uniform heating assembly for uniform heating of the electrolyte. The storage tank is pressurized by the pressure assembly, and the battery is injected with electrolyte through the solenoid valve and the liquid filling pipe.

[0004] The existing liquid injection equipment for lithium battery production has the following disadvantages: the device fixes the lithium battery body with a fixing component to complete the subsequent liquid injection process. After completion, it needs to be removed from the fixing device. Then, the next lithium battery body that needs liquid injection is installed between the fixing components. Since the next lithium battery body cannot be injected during the installation and disassembly of the lithium battery body, the work efficiency is reduced.

[0005] Therefore, a liquid injection device for lithium battery production is proposed to solve the problems mentioned above. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a liquid injection device for lithium battery production, which can solve the problem of not being able to inject liquid into the next lithium battery body during the installation and disassembly of the lithium battery body.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A liquid injection device for lithium battery production in this embodiment includes a workbench. A support foot is fixedly installed on the lower end face of the workbench. A clamping mechanism is slidably sleeved on the upper end face of the workbench. A liquid injection mechanism is fixedly installed on the side wall of the workbench. The clamping mechanism includes a limiting groove, a limiting plate, a moving plate, an mounting groove, an abutment pad, an abutment plate, a piston cylinder, a piston assembly, a toothed plate, a lithium battery body, gears, and a first servo motor. The surface of the lithium battery body is vertically slidably sleeved within the moving plate. One side of the abutment pad abuts against the surface of the lithium battery body. The side of the abutment pad facing away from the lithium battery body is fixedly installed against the surface of the abutment plate. The arc-shaped outer surface of the piston cylinder is fixedly installed within the moving plate. The surface of the piston assembly is sealed and sleeved against the inner wall of the piston cylinder.

[0008] Preferably, one side of the toothed plate is fixedly mounted on the front of the movable plate, the toothed plate meshes with the gear for transmission, and the lower end face of the movable plate is slidably connected to the upper end face of the worktable.

[0009] Preferably, the lower end face of the first servo motor is fixedly mounted on the upper end face of the worktable, and the output end of the servo motor is fixedly mounted on the inner wall of the gear.

[0010] Preferably, the upper end face of the limiting plate is fixedly installed on the lower end face of the moving plate, the limiting groove is formed in the inner wall of the worktable, and the surface of the limiting plate is slidably sleeved in the worktable.

[0011] Preferably, the injection mechanism includes a support plate, an injection tank, a second servo motor, a fixed plate, an LC controller, a temperature sensor, a heating mechanism, a stirring brush, a filter screen, a through hole, a sealing plug, a telescopic cylinder, a connecting plate, an infusion tube, an injection tube, and a solenoid valve. The surface of the LC controller is fixedly fitted inside the injection tank. The left side of the temperature sensor is fixedly installed on the right side of the injection tank and connected to it. One end of the stirring brush is rotatably fitted inside the injection tank, and the other end of the stirring brush penetrates the inner wall of the injection tank and is fixedly installed inside the output end of the second servo motor. The top end of the telescopic cylinder is fixedly installed on the lower end face of the injection tank, and the telescopic end of the telescopic cylinder is fixedly installed on the upper end face of the connecting plate. The arc-shaped outer surface of the infusion tube is fixedly installed inside the injection tank and connected to it. The bottom end of the infusion tube is fixedly installed inside the connecting plate and connected to the injection tube. The upper end face of the injection tube is fixedly installed on the inner wall of the connecting plate, and the inner wall of the solenoid valve is fixedly fitted onto the surface of the injection tube.

[0012] Preferably, the lower end face of the second servo motor is fixedly mounted on the upper end face of the fixing plate, the back side of the fixing plate is fixedly mounted on the front side of the injection tank, the surface of the filter screen is fixedly sleeved inside the injection tank, and the lower end face of the stirring brush is attached to the inner wall of the filter screen.

[0013] Preferably, the through hole is opened on the upper end face of the injection tank, the surface of the sealing plug is sealed and fitted inside the injection tank, the surface of the filter screen is fixedly fitted inside the injection tank, and both ends of the heating mechanism are fixedly installed inside the injection tank.

[0014] Compared with the prior art, this utility model provides a liquid injection device for lithium battery production, which has the following beneficial effects:

[0015] 1. Multiple lithium battery bodies can be installed simultaneously via the movable plate. Through the interaction between gears and toothed plates, each unfilled lithium battery body is positioned below the filling tube to complete the filling process. After completion, there is no need to wait for the filled lithium battery body to be released from the clamping mechanism before continuing to fill one lithium battery body, thus improving work efficiency.

[0016] 2. Through the heating mechanism, filter screen and stirring brush, the heating mechanism can heat the electrolyte to prevent it from cooling and clumping. The rotation of the stirring brush and its twisting with the filter screen accelerate the dispersion and heating of the clumped electrolyte.

[0017] 3. The infusion tube can move and stretch in conjunction with the connecting plate to ensure a stable output to the injection tube. When the solenoid valve is opened, the electrolyte flows smoothly into the lithium battery body, thus successfully completing the injection process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the liquid injection tube structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the injection tank of this utility model;

[0021] Figure 4 This is a schematic diagram of the lithium battery body structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the solenoid valve structure of this utility model.

[0023] In the diagram: 1. Workbench; 2. Support plate; 3. Injection tank; 4. Sealing plug; 5. Heating mechanism; 6. Filter screen; 7. Stirring brush; 8. Second servo motor; 9. Fixing plate; 10. Telescopic cylinder; 11. Connecting plate; 12. Infusion tube; 13. Injection tube; 14. Solenoid valve; 15. Limiting groove; 16. Moving plate; 17. Mounting groove; 18. Abutment pad; 19. Abutment plate; 20. Piston assembly; 21. Piston cylinder; 22. Lithium battery body; 23. Toothed plate; 24. Gear; 25. First servo motor; 26. Support foot; 27. Temperature sensor; 28. LC controller. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example:

[0026] Please see Figure 1 - Figure 5 This embodiment of a lithium battery production liquid injection device includes a workbench 1, a support foot 26 fixedly installed on the lower end face of the workbench 1, a clamping mechanism slidably sleeved on the upper end face of the workbench 1, and a liquid injection mechanism fixedly installed on the side wall of the workbench 1. The clamping mechanism includes a limiting groove 15, a limiting plate, a moving plate 16, a mounting groove 17, an abutment pad 18, an abutment plate 19, a piston cylinder 21, a piston assembly 20, a toothed plate 23, a lithium battery body 22, a gear 24, and a first servo motor 25. The surface of the lithium battery body 22 is vertically slidably sleeved in the moving plate 16. One side of the abutment pad 18 abuts against the surface of the lithium battery body 22. The side of the abutment pad 18 away from the lithium battery body 22 abuts against the surface of the plate 19 and is fixedly installed. The arc-shaped outer surface of the piston cylinder 21 is fixedly installed in the moving plate 16, and the surface of the piston assembly 20 is sealed and sleeved on the inner wall of the piston cylinder 21.

[0027] When the abutment pad 18 abuts against the surface of the lithium battery body 22, the positioning and installation of the lithium battery body 22 is completed. In conjunction with the subsequent liquid injection process, the moving plate 16 is provided with multiple mounting slots 17, which can simultaneously realize the installation and positioning of multiple lithium battery bodies 22. During the liquid injection process of the lithium battery body 22, there is no need to wait for the installation and disassembly of the lithium battery body 22, which greatly improves the liquid injection efficiency of the lithium battery body 22.

[0028] One side of the toothed plate 23 is fixedly installed on the front of the movable plate 16, and the toothed plate 23 meshes with the gear 24 for transmission. The lower end face of the movable plate 16 is slidably connected to the upper end face of the worktable 1.

[0029] By setting gear 24, when gear 24 drives tooth plate 23, gap transmission is achieved, so that the unfilled lithium battery body 22 is placed below the liquid injection tube 13 in sequence, allowing the lithium battery body 22 time to be filled with liquid.

[0030] The lower end face of the first servo motor 25 is fixedly installed on the upper end face of the worktable 1, and the output end of the servo motor is fixedly installed on the inner wall of the gear 24.

[0031] By setting the first servo motor 25, the gear 24 can be controlled to rotate when the first servo motor 25 is working;

[0032] The upper end face of the limiting plate is fixedly installed on the lower end face of the moving plate 16, the limiting groove 15 is opened on the inner wall of the worktable 1, and the surface of the limiting plate is slidably sleeved in the worktable 1.

[0033] The injection mechanism includes a support plate 2, an injection tank 3, a second servo motor 8, a fixing plate 9, an LC controller 28, a temperature sensor 27, a heating mechanism 5, a stirring brush 7, a filter screen 6, a through hole, a sealing plug 4, a telescopic cylinder 10, a connecting plate 11, an infusion pipe 12, an injection pipe 13, and a solenoid valve 14. The surface of the LC controller 28 is fixedly fitted inside the injection tank 3. The left side of the temperature sensor 27 is fixedly installed on the right side of the injection tank 3 and connected to it. One end of the stirring brush 7 is rotatably fitted inside the injection tank 3, and the other end of the stirring brush 7... The end of the cylinder 10 is fixedly installed inside the output end of the second servo motor 8 through the inner wall of the injection tank 3. The top end of the telescopic cylinder 10 is fixedly installed on the lower end face of the injection tank 3. The telescopic end of the telescopic cylinder 10 is fixedly installed on the upper end face of the connecting plate 11. The arc-shaped outer surface of the infusion tube 12 is fixedly installed inside the injection tank 3 and connected to it. The bottom end of the infusion tube 12 is fixedly installed inside the connecting plate 11 and connected to the injection tube 13. The upper end face of the injection tube 13 is fixedly installed on the inner wall of the connecting plate 11. The inner wall of the solenoid valve 14 is fixedly sleeved on the surface of the injection tube 13.

[0034] The temperature sensor 27 can detect the temperature inside the injection tank 3 in real time and transmit the received temperature information to the LC controller 28. The LC controller 28 then intelligently regulates the heating mechanism 5 to prevent overheating when heating the injection solution. At the same time, the interaction between the stirring brush and the filter screen 6 makes the electrolyte heated more evenly and improves its fluidity. The infusion tube 12 is made of silicone, which is elastic and can move up and down with the connecting plate 11, ensuring a stable output to the injection tube 13. The LC controller 28 is model ST89C51 and the temperature sensor 27 is model PT100. The LC controller 28 and the temperature sensor 27 are well known technologies to those skilled in the art, and therefore are not described in detail in this embodiment.

[0035] Among them, the lower end face of the second servo motor 8 is fixedly installed on the upper end face of the fixing plate 9, the back of the fixing plate 9 is fixedly installed on the front of the liquid injection tank 3, the surface of the filter screen 6 is fixedly sleeved inside the liquid injection tank 3, and the lower end face of the stirring brush 7 is attached to the inner wall of the filter screen 6.

[0036] By setting up filter screen 6, the dispersion of agglomerated electrolyte can be accelerated;

[0037] The through hole is located on the upper end face of the injection tank 3, the surface of the sealing plug 4 is sealed and fitted inside the injection tank 3, the surface of the filter screen 6 is fixedly fitted inside the injection tank 3, and both ends of the heating mechanism 5 are fixedly installed inside the injection tank 3.

[0038] The working principle of the above embodiments is as follows:

[0039] When in use, firstly, the worker pulls the sealing plug 4 upward from the injection tank 3, and then injects electrolyte into the injection tank 3 through the through hole;

[0040] Subsequently, the first servo motor 25, the second servo motor 8 and the telescopic cylinder 10 are intelligently controlled by the LC controller 28. During the operation, the second servo motor 8 can drive the stirring brush 7 to perform circular motion. During the rotation, the stirring brush 7 can slide against the surface of the filter screen 6.

[0041] The electrolyte can be heated by the heating component, and the stirring brush 7 can make the electrolyte more uniform when heated, so that the electrolyte can be injected into the lithium battery body 22 more smoothly.

[0042] Then, the lithium battery body 22 is vertically inserted into the movable plate 16 through the mounting slot 17. During the movement, the two sides of the lithium battery body 22 can slide downward along the surface of the abutment pad 18.

[0043] At the same time, the abutment pad 18 and abutment plate 19 are pushed outward, causing the piston assembly 20 to slide into the piston cylinder 21, leaving enough space for the lithium battery body 22 to be inserted into the moving plate 16. When the surface of the lithium battery body 22 is completely inserted into the moving plate 16.

[0044] The piston assembly 20 and the abutment plate 19 are moved toward the surface of the lithium battery body 22 by the air pressure in the piston cylinder 21, so that one side of the abutment pad 18 is stably attached to the surface of the lithium battery body 22, thus completing the positioning and installation of the lithium battery body 22.

[0045] After completion, the rotation of the first servo motor 25 can control the rotation of the gear 24. During the rotation of the gear 24, when the gear 24 transmits power to the gear plate 23 through the teeth, it can control the lower part of the moving plate 16 to slide to the right on the upper part of the worktable 1.

[0046] Since the surface of gear 24 has only one tooth, it can achieve intermittent transmission when the moving plate 16 is driven counterclockwise, so that different lithium battery bodies 22 can be briefly positioned directly below the injection tube 13, leaving enough space for injecting electrolyte into the lithium battery body 22.

[0047] When the lithium battery body 22, which needs to be injected with electrolyte, is directly below the injection tube 13, the telescopic cylinder 10 controls the connecting plate 11 to move downward and simultaneously drives the injection tube 13, controlling the bottom end of the injection tube 13 to abut against the inner wall of the lithium battery body 22, and drives the solenoid valve 14 to start for 0.3 seconds to smoothly inject the electrolyte into the lithium battery body 22, thus successfully completing the injection process. This operation is repeated.

[0048] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid injection device for lithium battery production, comprising a workbench (1), wherein a support leg (26) is fixedly installed on the lower end face of the workbench (1), characterized in that: The upper end face of the workbench (1) is slidably fitted with a clamping mechanism, and the side wall of the workbench (1) is fixedly installed with a liquid injection mechanism. The clamping mechanism includes a limiting groove (15), a limiting plate, a moving plate (16), a mounting groove (17), an abutment pad (18), an abutment plate (19), a piston cylinder (21), a piston assembly (20), a toothed plate (23), a lithium battery body (22), a gear (24), and a first servo motor (25). The surface of the lithium battery body (22) is vertically slidably fitted in the moving plate (16). One side of the abutment pad (18) abuts against the surface of the lithium battery body (22). The side of the abutment pad (18) away from the lithium battery body (22) abuts against the surface of the plate (19) and is fixedly installed. The arc-shaped outer surface of the piston cylinder (21) is fixedly installed in the moving plate (16), and the surface of the piston assembly (20) is sealed and fitted in the inner wall of the piston cylinder (21).

2. The electrolyte injection equipment for lithium battery production according to claim 1, characterized in that: One side of the toothed plate (23) is fixedly installed on the front of the movable plate (16), and the toothed plate (23) meshes with the gear (24) for transmission. The lower end face of the movable plate (16) is slidably connected to the upper end face of the worktable (1).

3. The electrolyte injection equipment for lithium battery production according to claim 1, characterized in that: The lower end face of the first servo motor (25) is fixedly installed on the upper end face of the worktable (1), and the output end of the servo motor is fixedly installed on the inner wall of the gear (24).

4. The electrolyte injection equipment for lithium battery production according to claim 1, characterized in that: The upper end face of the limiting plate is fixedly installed on the lower end face of the moving plate (16), the limiting groove (15) is opened on the inner wall of the worktable (1), and the surface of the limiting plate is slidably sleeved in the worktable (1).

5. The electrolyte injection equipment for lithium battery production according to claim 1, characterized in that: The injection mechanism includes a support plate (2), an injection tank (3), a second servo motor (8), a fixing plate (9), an LC controller (28), a temperature sensor (27), a heating mechanism (5), a stirring brush (7), a filter screen (6), a through hole, a sealing plug (4), a telescopic cylinder (10), a connecting plate (11), an infusion pipe (12), an injection pipe (13), and a solenoid valve (14). The surface of the LC controller (28) is fixedly fitted inside the injection tank (3). The left side of the temperature sensor (27) is fixedly installed on the right side of the injection tank (3) and connected to it. One end of the stirring brush (7) is rotatably fitted inside the injection tank (3). 7) The other end of the cylinder (10) is fixedly installed inside the output end of the second servo motor (8) through the inner wall of the injection tank (3). The top end of the telescopic cylinder (10) is fixedly installed on the lower end face of the injection tank (3). The telescopic end of the telescopic cylinder (10) is fixedly installed on the upper end face of the connecting plate (11). The arc-shaped outer surface of the infusion tube (12) is fixedly installed inside the injection tank (3) and connected to it. The bottom end of the infusion tube (12) is fixedly installed inside the connecting plate (11) and connected to the injection tube (13). The upper end face of the injection tube (13) is fixedly installed on the inner wall of the connecting plate (11). The inner wall of the solenoid valve (14) is fixedly sleeved on the surface of the injection tube (13).

6. The electrolyte injection equipment for lithium battery production according to claim 5, characterized in that: The lower end face of the second servo motor (8) is fixedly installed on the upper end face of the fixing plate (9), the back of the fixing plate (9) is fixedly installed on the front of the injection tank (3), the surface of the filter screen (6) is fixedly sleeved inside the injection tank (3), and the lower end face of the stirring brush (7) is attached to the inner wall of the filter screen (6).

7. The electrolyte injection equipment for lithium battery production according to claim 5, characterized in that: The through hole is opened on the upper end face of the injection tank (3), the surface of the sealing plug (4) is sealed and fitted inside the injection tank (3), the surface of the filter screen (6) is fixedly fitted inside the injection tank (3), and both ends of the heating mechanism (5) are fixedly installed inside the injection tank (3).

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