A constant temperature liquid injection device for lithium battery electrolyte injection

Abstract

The utility model relates to lithium battery manufacturing technical field especially, more particularly to a kind of constant-temperature liquid injection device for lithium battery electrolyte injection, comprising: conveying assembly, positioning assembly, liquid injection assembly and feed assembly;The conveying assembly includes base frame and conveying belt, conveying passage is formed in the base frame, the conveying belt is located in conveying passage and is used to convey lithium battery;The positioning assembly is fixed in the both sides of base frame, for clamping lithium battery;The liquid injection assembly includes moving unit and liquid injection unit, the moving unit is installed on the base frame, the liquid injection unit is installed on the moving unit and can move along perpendicular to conveying passage direction, for liquid injection for lithium battery;The feed assembly includes the storage electrolyte storage barrel, the storage barrel is communicated with the liquid injection unit. Through the utility model, the problem of injection position in the prior art, poor production continuity and limited equipment application range is solved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery manufacturing technology, and in particular to a constant temperature electrolyte injection device for lithium battery electrolyte injection. Background Technology

[0002] In the production process of lithium batteries, electrolyte injection is one of the most crucial steps. The quality of the electrolyte, the amount injected, and the temperature during injection all directly affect key indicators of lithium batteries such as capacity, cycle life, and safety performance.

[0003] A typical constant-temperature electrolyte injection device in the prior art includes: a constant-flow pump, an injection needle, an injection cup, and a heating device. The constant-flow pump is a pump body used for precise delivery of electrolyte. The injection needle is an injection component that is directly inserted into the battery cell. The injection cup is a container for receiving the electrolyte. The heating device is installed in the pipeline between the constant-flow pump and the needle, and between the needle and the injection cup, to heat the electrolyte and compensate for its temperature. The electrolyte injection process is as follows: after being preheated in the auxiliary tank, the electrolyte is delivered by the constant-flow pump to the heating pipeline for further heating, and finally injected into the battery cell through the needle.

[0004] Therefore, the aforementioned prior art has the following problems:

[0005] First, the position of the injection needle is fixed, and the equipment needs to be repeatedly adjusted or a special device needs to be replaced for lithium batteries of different sizes or with offset injection holes, resulting in poor adaptability.

[0006] Secondly, the single-point static injection mode cannot be linked with the conveyor line, resulting in production interruption and making it difficult to achieve continuous flow operation. Utility Model Content

[0007] To address the shortcomings of existing technologies, the purpose of this utility model embodiment is to provide a constant-temperature liquid injection device for a lithium battery liquid injection machine, thereby solving the problems of non-adjustable liquid injection position, poor production continuity, and limited equipment applicability in existing technologies. By having a movable liquid injection unit work in conjunction with a conveyor line, continuous constant-temperature liquid injection of lithium batteries of various specifications can be achieved, improving production efficiency and equipment versatility.

[0008] To achieve the above objectives, the present invention provides the following technical solutions:

[0009] A constant-temperature electrolyte injection device for lithium battery electrolyte injection includes: a conveying component, a positioning component, an injection component, and a feeding component; the conveying component includes a base frame and a conveyor belt, a conveying channel is formed within the base frame, and the conveyor belt is located within the conveying channel for conveying lithium batteries; the positioning component is fixed to both sides of the base frame for clamping the lithium batteries; the injection component includes a moving unit and an injection unit, the moving unit is mounted on the base frame, and the injection unit is mounted on the moving unit and can move along a direction perpendicular to the conveying channel for injecting electrolyte into the lithium batteries; the feeding component includes a storage tank for storing electrolyte, and the storage tank is connected to the injection unit.

[0010] Optionally, the base frame has a U-shaped structure with the opening facing upwards. The base frame has an installation groove inside, which forms a conveying channel. Multiple drive rollers are installed in the installation groove of the base frame, and the conveyor belt is wound around the drive rollers. A first motor is installed on the outside of the base frame, and the first motor is connected to the drive rollers.

[0011] Optionally, the positioning assembly has two sets, symmetrically installed on both sides of the mounting groove. The positioning assembly includes a first electric push rod and a clamping plate. The first electric push rod is fixedly installed on the base frame, and the clamping plate is installed on the telescopic end of the first electric push rod.

[0012] Optionally, a rubber plate is provided on the side of the clamp facing the conveying channel.

[0013] Optionally, the moving unit includes a top frame, a lead screw, a moving plate, and a second motor. The two ends of the top frame are mounted on the base frame, and a top groove is opened in the middle of the top frame. The top groove is perpendicular to the conveying channel. A lead screw is rotatably installed in the top groove. The moving plate is threaded onto the lead screw. The second motor is installed on the outside of the top frame and connected to the lead screw. By driving the lead screw to rotate, the moving plate is moved along the top groove.

[0014] Optionally, a third motor is installed on the top of the movable plate, and a base plate is provided at the bottom of the movable plate. The base plate is installed at the bottom of the output shaft of the third motor, and a second electric push rod is installed on the lower side of the base plate. The bottom of the second electric push rod is a telescopic end, and a connecting plate is installed at the telescopic end of the second electric push rod. An injection unit is installed at the end of the connecting plate.

[0015] Optionally, the injection unit includes an injection head and a baffle. The injection head is fixedly installed at the end of the connecting plate, and the top of the injection head communicates with the storage tank. The baffle is installed on the outer wall of the injection head.

[0016] Optionally, the storage tank is fixed with support frames on both sides. The support frames are U-shaped and the bottom of the support frames is fixed to the outside of the base frame. The storage tank has a storage cavity for storing electrolyte.

[0017] Optionally, the bottom of both sides of the storage tank has an inclined liquid guiding slope, and a heating plate is installed at the bottom inside the storage tank.

[0018] Optionally, a pressure pump and a hose are installed at the bottom of the storage tank. The pressure pump is connected to the storage chamber of the storage tank, and one end of the hose is connected to the pressure pump and the other end is connected to the injection head of the injection unit.

[0019] One or more technical solutions provided in the embodiments of this utility model have at least the following technical effects or advantages:

[0020] In this invention's electrolyte injection device, the conveying component forms a conveying channel that allows the lithium battery to move continuously, providing a foundation for assembly line operations. The positioning component can fix the lithium battery when it moves to the injection position, ensuring accurate injection. The feeding component provides a stable source of electrolyte for injection. The moving unit of the injection component can adjust the position of the injection unit, solving the problem that existing devices can only inject electrolyte in a fixed position. The coordinated work of all components solves the problems of non-adjustable injection position, poor production continuity, and limited applicability of existing technologies. It achieves assembly line injection to improve efficiency and expands the device's application range through flexible adjustment of the injection position.

[0021] Additional advantages of this invention will be set forth in the description which follows, and in part will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0022] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. Furthermore, the spacing or dimensions between components are exaggerated to show their positions; the schematic diagrams are for illustrative purposes only.

[0023] Figure 1 This is one of the perspective views of the liquid injection device provided in the embodiments of this utility model;

[0024] Figure 2 This is the second perspective view of the liquid injection device provided in this embodiment of the utility model;

[0025] Figure 3 This is the third perspective view of the liquid injection device provided in this embodiment of the utility model;

[0026] Figure 4 This is a schematic diagram of the concealed feeding assembly provided in this embodiment of the utility model;

[0027] Figure 5 This is a schematic diagram of the feeding assembly provided in an embodiment of the present utility model;

[0028] Figure 6 This is a schematic diagram of the bottom of the feeding assembly provided in this embodiment of the utility model;

[0029] Figure 7 This is a schematic diagram of the interior of the storage bin provided in this embodiment of the utility model;

[0030] Figure 8 This is a schematic diagram of the positioning component provided in an embodiment of the present utility model;

[0031] Figure 9 This is a schematic diagram of the top of the injection assembly provided in this embodiment of the utility model;

[0032] Figure 10 This is a schematic diagram of the bottom of the injection assembly provided in this embodiment of the utility model;

[0033] In the diagram: 1. Conveying assembly; 11. Base frame; 12. Mounting groove; 13. Conveyor belt; 14. Drive roller; 15. First motor; 2. Positioning assembly; 21. Rubber plate; 22. Clamping plate; 23. First electric push rod; 3. Injection assembly; 31. Top frame; 32. Top groove; 33. Lead screw; 34. Second motor; 35. Moving plate; 36. Third motor; 37. Base plate; 38. Second electric push rod; 39. Connecting plate; 310. Injection head; 311. Baffle; 4. Feeding assembly; 41. Storage tank; 42. Storage cavity; 43. Support frame; 44. Pressure pump; 45. Hoses; 46. Liquid guide slope; 47. Heating plate; Detailed Implementation

[0034] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown in the figure, this embodiment proposes a constant-temperature electrolyte injection device for lithium battery electrolyte injection, including: a conveying component 1, a positioning component 2, an injection component 3, and a feeding component 4; the conveying component 1 includes a base frame 11 and a conveyor belt 13, a conveying channel is formed in the base frame 11, and the conveyor belt 13 is located in the conveying channel for conveying lithium batteries; the positioning component 2 is fixed on both sides of the base frame 11 for clamping lithium batteries; the injection component 3 includes a moving unit and an injection unit, the moving unit is mounted on the base frame 11, and the injection unit is mounted on the moving unit and can move along a direction perpendicular to the conveying channel for injecting electrolyte into the lithium batteries; the feeding component 4 includes a storage tank 41 for storing electrolyte, and the storage tank 41 is connected to the injection unit.

[0036] The electrolyte injection assembly 3 is positioned above the conveying assembly 1, and the feeding assembly 4 is positioned above the electrolyte injection assembly 3. The positioning assembly 2 is mounted on the conveying assembly 1 and positioned below the electrolyte injection assembly 3. A conveying channel for transporting lithium batteries along a preset path is formed on the conveying assembly 1. A positioning space for clamping lithium batteries is formed between the two positioning assemblies 2. The electrolyte injection assembly 3 includes a moving unit and an injection unit. The moving unit drives the injection unit to reciprocate vertically relative to the conveying assembly 1. A cavity for storing electrolyte is formed at the top of the feeding assembly 4, and the inlet end of the injection unit communicates with the cavity. The injection unit extracts electrolyte from the cavity and injects it into the lithium battery. When electrolyte injection is required, the conveying assembly 1 moves the lithium battery, and the positioning assembly 2 fixes the lithium battery. The injection unit injects electrolyte from the feeding assembly 4 into the lithium battery, allowing the device to operate in a continuous flow, improving the efficiency of lithium battery electrolyte injection. Furthermore, the reciprocating movement of the injection unit by the moving unit allows the device to adjust the injection position, thereby increasing the applicability of the device.

[0037] like Figure 8 As shown, the base frame 11 has a U-shaped structure with its opening facing upwards. The base frame 11 has an installation groove 12 inside, which forms a conveying channel. Multiple drive rollers 14 are installed in the installation groove 12 of the base frame 11. The conveyor belt 13 is wound around the drive rollers 14. A first motor 15 is installed on the outside of the base frame 11, and the first motor 15 is connected to the drive rollers 14.

[0038] The base frame 11 adopts a U-shaped structure with its opening facing upwards. The mounting groove 12 inside forms a conveying channel, allowing the conveyor belt 13 to be stably positioned inside the base frame 11, providing a solid foundation for the transport of lithium batteries. Multiple drive rollers 14 are installed within the mounting groove 12 of the base frame 11. The conveyor belt 13 is wound around the drive rollers 14, ensuring the tension of the conveyor belt 13 and the stability of the transmission. A first motor 15 installed on the outside of the base frame 11 is connected to the drive rollers 14. The motor drives the drive rollers 14 to rotate, thereby driving the conveyor belt 13 to achieve automated transport of lithium batteries.

[0039] The positioning component 2 has two sets, which are symmetrically installed on both sides of the mounting groove 12. The positioning component 2 includes a first electric push rod 23 and a clamping plate 22. The first electric push rod 23 is fixedly installed on the base frame 11, and the clamping plate 22 is installed on the telescopic end of the first electric push rod 23.

[0040] The positioning components 2 are arranged in two symmetrical sets on both sides of the mounting groove 12. Each positioning component 2 includes a first electric push rod 23 and a clamping plate 22. The first electric push rod 23 is fixedly mounted on the base frame 11, and its telescopic end is connected to the clamping plate 22. When it is necessary to fix the lithium battery, the first electric push rod 23 extends and retracts, driving the clamping plate 22 to move towards the center of the conveying channel, thereby clamping and fixing the lithium battery. This symmetrical positioning method can ensure that the lithium battery remains stable during the electrolyte injection process and avoid problems such as inaccurate electrolyte injection or electrolyte leakage due to positional displacement.

[0041] Furthermore, a rubber plate 21 is provided on the side of the clamping plate 22 facing the conveying channel. The rubber plate 21 has good flexibility and elasticity, and can fit tightly against the battery surface when clamping the lithium battery, providing uniform clamping force, preventing damage to the battery surface, and enhancing the stability of the clamping. The rubber plate 21 can also reduce friction between the clamping plate 22 and the battery, reducing wear on the battery during the clamping process.

[0042] like Figure 9 , Figure 10 As shown, the moving unit includes a top frame 31, a lead screw 33, a moving plate 35, and a second motor 34. The two ends of the top frame 31 are mounted on the base frame 11, and a top groove 32 is opened in the middle of the top frame 31. The top groove 32 is perpendicular to the conveying channel. The lead screw 33 is rotatably installed in the top groove 32. The moving plate 35 is threaded onto the lead screw 33. The second motor 34 is installed on the outside of the top frame 31 and connected to the lead screw 33. By driving the lead screw 33 to rotate, the moving plate 35 is moved along the top groove 32.

[0043] When the second motor 34 starts, the lead screw 33 rotates accordingly. Due to the effect of the threaded transmission, the moving plate 35 moves along the direction of the top groove 32, realizing the precise movement of the liquid injection unit in the direction perpendicular to the conveying channel. This allows the liquid injection head 310 to be accurately aligned with lithium batteries (liquid injection ports) at different positions, meeting the liquid injection requirements of batteries of different specifications and positions in the assembly line operation.

[0044] The top of the movable plate 35 is equipped with a third motor 36, and the bottom of the movable plate 35 has a base plate 37. The base plate 37 is installed at the bottom of the output shaft of the third motor 36. A second electric push rod 38 is installed on the lower side of the base plate 37. The bottom of the second electric push rod 38 is a telescopic end. A connecting plate 39 is installed at the telescopic end of the second electric push rod 38. An injection unit is installed at the end of the connecting plate 39.

[0045] The third motor 36 drives the base plate 37 to rotate, which in turn drives the second electric push rod 38 and the connecting plate 39 to rotate, enabling the injection unit to flexibly turn in space to adapt to injection requirements at different angles and positions. The extension and retraction of the second electric push rod 38 can precisely control the height of the injection unit, ensuring that the injection head 310 can be accurately inserted into the injection hole of the lithium battery for precise electrolyte injection. This multi-degree-of-freedom motion control improves the adaptability and flexibility of the injection device, enabling it to cope with various complex production scenarios and lithium batteries of different specifications.

[0046] The injection unit includes an injection head 310 and a baffle 311. The injection head 310 is fixedly installed at the end of the connecting plate 39. The top of the injection head 310 is connected to the storage tank 41. The baffle 311 is installed on the outer wall of the injection head 310.

[0047] As the direct component for electrolyte injection, the injection head 310, connected to the storage tank 41, ensures a continuous supply of electrolyte. The baffle 311, installed on the outer wall of the injection head 310, can block the connection between the injection head 310 and the lithium battery injection port during the injection process, preventing electrolyte leakage, reducing electrolyte waste, and maintaining a clean working environment. Together with the injection head 310, it enhances the safety and environmental friendliness of the injection process.

[0048] like Figure 5 , Figure 6 As shown, the storage tank 41 is fixed with support frames 43 on both sides. The support frames 43 are U-shaped and the bottom of the support frames 43 is fixed to the outside of the base frame 11. The storage tank 41 has a storage cavity 42 for storing electrolyte.

[0049] The storage tank 41 is fixed with U-shaped support frames 43 on both sides. The bottom of the support frames 43 is fixed to the outside of the base frame 11. This structure provides stable support for the storage tank 41, ensuring that the storage tank 41 is fixed in position in the device and preventing the storage tank 41 from shifting or tipping over due to vibration or other external forces. The storage tank 41 is provided with a storage cavity 42 for storing electrolyte. The capacity and shape of the storage cavity 42 are designed according to actual production needs to meet the electrolyte storage requirements of mass production.

[0050] like Figure 7 As shown, the bottom of both sides of the storage tank 41 has inclined liquid guiding slopes 46, and a heating plate 47 is installed at the bottom inside the storage tank 41.

[0051] The inclined angle of the liquid guiding slope 46 can guide the electrolyte in the storage chamber 42 to flow smoothly to the outlet at the bottom of the storage tank 41, ensuring smooth flow of the electrolyte and avoiding electrolyte residue. The heating plate 47 installed at the bottom of the storage tank 41 is used to heat the electrolyte at a constant temperature, keeping the electrolyte within a suitable temperature range and preventing the electrolyte's fluidity from being affected by excessively low temperature.

[0052] A pressure pump 44 and a hose 45 are installed at the bottom of the storage tank 41. The pressure pump 44 is connected to the storage chamber 42 of the storage tank 41. One end of the hose 45 is connected to the pressure pump 44, and the other end is connected to the injection head 310 of the injection unit.

[0053] The pressurizing pump 44 is connected to the storage chamber 42, allowing the electrolyte to be delivered to the injection head 310 through the hose 45, providing power for the flow of the electrolyte and ensuring that the electrolyte can be smoothly injected into the lithium battery. The flexibility of the hose 45 can adapt to the movement and rotation of the injection unit, avoiding pipeline damage caused by the adjustment of the injection unit position, ensuring the continuity of electrolyte delivery, and forming a stable electrolyte delivery channel together with the pressurizing pump 44 and the injection head 310.

[0054] Injection process:

[0055] Before injecting electrolyte into the lithium battery, electrolyte is added to the storage chamber 42 of the storage tank 41. After adding electrolyte, the lithium battery to be injected is placed on the conveyor belt 13. The first motor 15 works to drive the transmission roller 14 to rotate, which in turn drives the conveyor belt 13 to move. The lithium battery is moved by the conveyor belt 13, so that the lithium battery moves in a continuous flow to below the injection head 310.

[0056] The first electric push rod 23 operates, thereby driving the clamping plate 22 to move, so that the clamping plate 22 clamps the lithium battery. When the clamping plate 22 clamps the lithium battery, the rubber plate 21 cooperates to make the lithium battery more securely fixed.

[0057] The second motor 34 drives the lead screw 33 to rotate in the top groove 32 on the top frame 31, thereby moving the moving plate 35 along the lead screw 33. The movement of the moving plate 35 synchronously drives the third motor 36, which in turn moves the injection head 310. Conversely, the third motor 36 drives the base plate 37 to rotate, which in turn drives the second electric push rod 38 and the connecting plate 39 to rotate, thereby rotating the injection head 310. This adjusts the position of the injection head 310, positioning it above the lithium battery, making it easier to align with different lithium batteries for injection and thus improving the device's applicability. After the injection head 310 is positioned, the second electric push rod 38 moves the connecting plate 39 downwards, which in turn moves the injection head 310 downwards, allowing it to be inserted into the lithium battery.

[0058] Electrolyte is drawn from storage chamber 42 inside storage tank 41 by pressure pump 44 and delivered through hose 45. Electrolyte is injected into lithium battery through injection head 310 and the injection position is blocked by cover 311 to prevent accidental leakage of electrolyte. The above steps are repeated to carry out continuous electrolyte injection operation.

[0059] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A constant-temperature electrolyte injection device for lithium battery electrolyte injection, characterized in that, include: Conveying components, positioning components, liquid injection components, and feeding components; The conveying assembly includes a base frame and a conveyor belt, with a conveying channel formed within the base frame and the conveyor belt located within the conveying channel for conveying lithium batteries; The positioning components are fixed to both sides of the base frame for clamping the lithium battery; The liquid injection assembly includes a moving unit and a liquid injection unit. The moving unit is mounted on the base frame, and the liquid injection unit is mounted on the moving unit and can move along a direction perpendicular to the delivery channel for injecting liquid into the lithium battery. The feeding assembly includes a storage tank for storing electrolyte, and the storage tank is connected to the injection unit.

2. The isothermal electrolyte injection device for lithium battery electrolyte injection as described in claim 1, characterized in that, The base frame has a U-shaped structure with its opening facing upwards. The base frame has an installation groove inside, which forms a conveying channel. Multiple drive rollers are installed in the installation groove of the base frame, and the conveyor belt is wound around the drive rollers. A first motor is installed on the outside of the base frame and is connected to the drive rollers.

3. The isothermal electrolyte injection device for lithium battery electrolyte injection as described in claim 2, characterized in that, The positioning assembly has two sets, symmetrically installed on both sides of the mounting groove. The positioning assembly includes a first electric push rod and a clamping plate. The first electric push rod is fixedly installed on the base frame, and the clamping plate is installed on the telescopic end of the first electric push rod.

4. The isothermal electrolyte injection device for lithium battery electrolyte injection as described in claim 3, characterized in that, A rubber plate is provided on the side of the clamp facing the conveying channel.

5. The isothermal electrolyte injection device for lithium battery electrolyte injection as described in claim 1, characterized in that, The moving unit includes a top frame, a lead screw, a moving plate, and a second motor. The two ends of the top frame are mounted on the base frame, and a top groove is opened in the middle of the top frame. The top groove is perpendicular to the conveying channel. A lead screw is rotatably installed in the top groove. The moving plate is threaded onto the lead screw. The second motor is installed on the outside of the top frame and connected to the lead screw. By driving the lead screw to rotate, the moving plate is moved along the top groove.

6. The isothermal electrolyte injection device for lithium battery electrolyte injection as described in claim 5, characterized in that, A third motor is installed on the top of the movable plate, and a base plate is installed at the bottom of the movable plate. The base plate is installed at the bottom of the output shaft of the third motor. A second electric push rod is installed on the lower side of the base plate. The bottom of the second electric push rod is a telescopic end. A connecting plate is installed at the telescopic end of the second electric push rod, and an injection unit is installed at the end of the connecting plate.

7. The isothermal electrolyte injection device for lithium battery electrolyte injection as described in claim 6, characterized in that, The injection unit includes an injection head and a baffle. The injection head is fixedly installed at the end of the connecting plate, and the top of the injection head is connected to the storage tank. The baffle is installed on the outer wall of the injection head.

8. The isothermal electrolyte injection device for lithium battery electrolyte injection as described in claim 7, characterized in that, The storage tank has support frames fixed on both sides. The support frames are U-shaped and the bottom of the support frames are fixed to the outside of the base frame. The storage tank has a storage cavity for storing electrolyte.

9. The isothermal electrolyte injection device for lithium battery electrolyte injection as described in claim 8, characterized in that, The storage tank has inclined liquid guiding slopes on both sides of the bottom, and a heating plate is installed at the bottom inside the storage tank.

10. The isothermal electrolyte injection device for lithium battery electrolyte injection as described in claim 8, characterized in that, A pressure pump and a hose are installed at the bottom of the storage tank. The pressure pump is connected to the storage chamber of the storage tank. One end of the hose is connected to the pressure pump, and the other end is connected to the injection head of the injection unit.

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