Novel lithium battery electrolyte injection device
By introducing a sealing sleeve and limiting block structure into the lithium battery electrolyte injection device, the problem of insufficient sealing between the vacuum pipe and the lithium battery is solved, achieving a highly efficient vacuuming and electrolyte injection process, reducing bubble formation, and improving the electrolyte injection quality of the lithium battery.
Patent Information
- Application Number
- CN202422640144.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-10-30
AI Technical Summary
Existing lithium battery electrolyte injection devices suffer from insufficient sealing between the vacuum tube and the lithium battery during vacuuming, resulting in poor vacuum performance.
A novel lithium battery electrolyte injection device was designed. By setting a sealing sleeve and a limiting block structure on the electrolyte injection pipe, the sealing performance between the venting pipe and the electrolyte injection pipe is ensured. The lifting and lowering of the sealing sleeve is controlled by a hydraulic lifting mechanism to achieve close contact between the sealing seat and the lithium battery, ensuring the sealing performance during the venting process.
It effectively reduces the formation of air bubbles during electrolyte injection, ensures efficient vacuuming, and improves the quality of lithium battery electrolyte injection.
Smart Images
Figure CN223514207U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lithium battery production technology, specifically a novel lithium battery electrolyte injection device. Background Technology
[0002] Lithium-ion batteries are a widely used type of rechargeable battery that uses lithium ions or lithium metal as the primary charge carrier. They are characterized by high energy density, long lifespan, and relative portability, and are widely used in various fields such as electronics, electric vehicles, and energy storage systems. The electrolyte is a key component of lithium-ion batteries, conducting lithium ions between the positive and negative electrodes to enable the electrochemical reaction. It is added to the lithium-ion battery through a lithium-ion battery electrolyte injection device.
[0003] Existing lithium battery electrolyte injection devices typically consist of a storage tank, metering system, delivery pipes and valves, filling needles, and sealing devices. However, before injecting the electrolyte, the lithium battery needs to be evacuated. This helps to remove air and other gases from inside the battery, creating conditions for subsequent electrolyte injection and reducing the possibility of bubble formation. Currently, the vacuum pipe usually has insufficient sealing between itself and the lithium battery, resulting in poor vacuum performance. Utility Model Content
[0004] The purpose of this invention is to provide a novel lithium battery electrolyte injection device to solve the problem mentioned in the background art that current lithium battery electrolyte injection devices on the market use a vacuum tube to perform vacuuming of the lithium battery, and the vacuum tube usually has insufficient sealing between itself and the lithium battery, resulting in poor vacuum effect.
[0005] To achieve the above objectives, this utility model provides the following technical solution: A novel lithium battery electrolyte injection device, comprising an electrolyte injection device body and a lithium battery, wherein the electrolyte injection device body is provided with an electrolyte injection pipe, and an electrolyte delivery pipe is connected to the side of the electrolyte injection pipe; a feeding rack is provided below the electrolyte injection device body, and an installation box base is connected to the upper end of the feeding rack; an installation frame is provided on the side of the installation box base, and a hydraulic lifting mechanism is installed on the installation frame, and the output end of the hydraulic lifting mechanism is connected to the upper end of the electrolyte injection pipe; a sealing sleeve is movably sleeved on the outside of the electrolyte injection pipe, and a first limiting block and a second limiting block are tightly fitted inside the sealing sleeve, and the first limiting block and the second limiting block are respectively sealed and penetrated with the electrolyte injection pipe; an air extraction pipe is connected to the side of the sealing sleeve, and a sealing seat is engaged at the bottom of the sealing sleeve.
[0006] Preferably, the electrolyte injection tube is securely fitted with an upper positioning component and a lower limiting component, and the electrolyte injection tube is located directly above the lithium battery injection port.
[0007] Preferably, a spring is provided between the upper positioning member and the first limiting block, and the spring is movably sleeved outside the electrolyte injection tube.
[0008] Preferably, the second limiting block is located above the lower limiting member, and the side of the second limiting block is provided with connecting holes at even intervals.
[0009] Preferably, the air extraction pipe is located between the first limiting block and the second limiting block, and the air extraction pipe is connected to the connecting hole.
[0010] Preferably, the sealing seat is a hollow conical frustum structure, and the bottom of the sealing seat is in contact with the lithium battery.
[0011] Compared with existing technologies, the advantages of this invention are as follows: This novel lithium battery electrolyte injection device places the evacuation pipe for lithium battery evacuation on a sealing sleeve. Positioning is achieved through the sleeve's fit with the electrolyte injection pipe, allowing the sealing sleeve to move up and down with the electrolyte injection pipe, ensuring a tight seal during evacuation and effectively reducing bubble formation during electrolyte injection. Furthermore, this novel lithium battery electrolyte injection device incorporates a lower limiter on the electrolyte injection pipe to restrict the movement of the sealing sleeve, and an upper positioning element to secure the sealing seat, ensuring efficient vacuuming before electrolyte injection. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of a novel lithium battery electrolyte injection device according to the present invention.
[0013] Figure 2 This utility model relates to a novel lithium battery electrolyte injection device. Figure 1 Enlarged structural diagram at point A in the middle;
[0014] Figure 3 This is a cross-sectional view of the position of the electrolyte injection tube relative to the electrolyte injection tube in a novel lithium battery electrolyte injection device according to this utility model.
[0015] In the diagram: 1. Electrolyte injection device body; 2. Mounting box base; 3. Mounting frame; 4. Hydraulic lifting mechanism; 5. Electrolyte injection pipe; 501. Upper positioning component; 502. Lower limiting component; 6. Electrolyte delivery pipe; 7. Sealing sleeve; 701. Air extraction pipe; 702. First limiting block; 703. Second limiting block; 704. Connecting hole; 8. Feeding rack; 9. Spring; 10. Sealing seat; 11. Lithium battery. Detailed Implementation
[0016] 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.
[0017] Please see Figure 1-3This utility model provides a technical solution: a novel lithium battery electrolyte injection device, comprising an electrolyte injection device body 1 and a lithium battery 11. An electrolyte injection tube 5 is provided on the electrolyte injection device body 1. An upper positioning member 501 and a lower limiting member 502 are fastened to the electrolyte injection tube 5, and the electrolyte injection tube 5 is located directly above the electrolyte inlet of the lithium battery 11. This structure allows the upper positioning member 501 and the lower limiting member 502 to be fastened relative to the outer wall of the electrolyte injection tube 5 via screws, preventing the lower limiting member 502 from obstructing the electrolyte injection tube 5 from extending into the battery for electrolyte injection. A spring 9 is provided between the upper positioning member 501 and the first limiting block 702, and the spring 9 is movably sleeved outside the electrolyte injection tube 5. In this structure, when the electrolyte injection pipe 5 moves downward, the spring 9 falls along with the sealing sleeve 7 under gravity. After the sealing sleeve 7 is supported on the lithium battery 11 by the sealing seat 10, the upper positioning member 501 can compress the spring 9 to make the sealing seat 10 seal more tightly relative to the lithium battery 11. An electrolyte delivery pipe 6 is connected to the side of the electrolyte injection pipe 5. A feeding rack 8 is provided below the main body 1 of the electrolyte injection device, and a mounting box 2 is connected to the upper end of the feeding rack 8. A mounting bracket 3 is provided on the side of the mounting box 2, and a hydraulic lifting mechanism 4 is installed on the mounting bracket 3. The output end of the hydraulic lifting mechanism 4 is connected to the upper end of the electrolyte injection pipe 5. The sealing sleeve 7 is movably sleeved on the outside of the electrolyte injection pipe 5. The inner side of the sealing sleeve 7 is tightly fitted with a first limiting block 702 and a second limiting block 703. The second limiting block 703 is located above the lower limiting member 502, and the side of the second limiting block 703 is evenly spaced with connecting holes 704. When the electrolyte injection pipe 5 moves downward, the second limiting block 703 disengages from the support of the lower limiting member 502. At this time, the sealing sleeve 7, together with the second limiting block 703, the first limiting block 702, the venting pipe 701, and the sealing seat 10, moves downward under the action of gravity. The first limiting block 702 and the second limiting block 703 are respectively sealed and penetrated with the electrolyte injection pipe 5. The side of the sealing sleeve 7 is connected to the venting pipe 701, which is located at the first limiting block 702. 2. The position between the second limiting block 703 and the suction pipe 701 is connected to the connecting hole 704. This structure allows the connecting hole 704 to connect the suction pipe 701 and the lithium battery 11, so that the lithium battery 11 can be vacuumed, which facilitates the filling of the lithium battery 11 with electrolyte. The suction pipe 701 is used in conjunction with the suction pump. After the suction pump stops working, the electrolyte injection device body 1 performs the electrolyte filling process. The bottom of the sealing sleeve 7 is engaged with the sealing seat 10. The sealing seat 10 is a hollow conical frustum structure, and the bottom of the sealing seat 10 contacts and cooperates with the lithium battery 11. This structure allows the sealing sleeve 7 to seal the filling port of the lithium battery 11 through the sealing seat 10, ensuring that the suction pipe 701 can perform the suction process.
[0018] Working principle: When using this new lithium battery electrolyte injection device, the lithium battery 11 is first moved to the bottom of the electrolyte injection pipe 5 by the feeding rack 8. The hydraulic lifting mechanism 4, under the positioning of the mounting frame 3 and the mounting box 2, moves the electrolyte injection pipe 5 downward, so that the electrolyte injection pipe 5 extends into the lithium battery 11. At this time, the second limiting block 703 is disengaged from the support of the lower limiting member 502 and moves downward under the action of gravity. At the same time, the sealing sleeve 7, the vent pipe 701, the first limiting block 702, the spring 9, and the sealing seat 10 move downward synchronously. After the sealing seat 10 contacts the lithium battery 11, the sealing sleeve 7 stops moving. As the upper positioning member 501 moves, it exerts pressure on the spring 9, which has stopped moving downward. Compression processing is performed to provide movement space for the electrolyte injection pipe 5 while pressing the sealing seat 10 to ensure the sealing of the venting pipe 701 during venting. The connecting hole 704 connects the venting pipe 701 to the lithium battery 11. After venting is completed, the control valve of the electrolyte delivery pipe 6 is opened, allowing the electrolyte to be injected into the lithium battery 11 through the electrolyte injection pipe 5, realizing the efficient operation of the electrolyte injection device body 1. After the electrolyte injection is completed, the electrolyte injection pipe 5 rises. At this time, the lower limit member 502 drives the second limit block 703 to rise, thereby resetting the sealing sleeve 7, spring 9, and sealing seat 10 for the next electrolyte injection operation, thus completing a series of operations.
[0019] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A novel lithium battery electrolyte injection device, comprising an electrolyte injection device body (1) and a lithium battery (11), wherein the electrolyte injection device body (1) is provided with an electrolyte injection pipe (5), and an electrolyte delivery pipe (6) is connected to the side of the electrolyte injection pipe (5), characterized in that: The electrolyte injection device body (1) is provided with a feeding rack (8) below, and the upper end of the feeding rack (8) is connected to the mounting box base (2). The mounting box base (2) is provided with a mounting bracket (3) on its side, and a hydraulic lifting mechanism (4) is installed on the mounting bracket (3). The output end of the hydraulic lifting mechanism (4) is connected to the upper end of the electrolyte injection pipe (5). The electrolyte injection pipe (5) is movably fitted with a sealing sleeve (7), and the inner side of the sealing sleeve (7) is tightly fitted with a first limiting block (702) and a second limiting block (703). The first limiting block (702) and the second limiting block (703) are respectively sealed and penetrated with the electrolyte injection pipe (5). The side of the sealing sleeve (7) is connected to a suction pipe (701), and the bottom of the sealing sleeve (7) is fitted with a sealing seat (10).
2. The novel lithium battery electrolyte injection device according to claim 1, characterized in that: The electrolyte injection tube (5) is fastened with an upper positioning component (501) and a lower limiting component (502), and the electrolyte injection tube (5) is located directly above the electrolyte injection port of the lithium battery (11).
3. The novel lithium battery electrolyte injection device according to claim 2, characterized in that: A spring (9) is provided between the upper positioning member (501) and the first limiting block (702), and the spring (9) is movably sleeved outside the electrolyte injection tube (5).
4. The novel lithium battery electrolyte injection device according to claim 2, characterized in that: The second limiting block (703) is located above the lower limiting member (502), and the side of the second limiting block (703) is provided with connecting holes (704) evenly spaced apart.
5. The novel lithium battery electrolyte injection device according to claim 1, characterized in that: The air extraction pipe (701) is located between the first limiting block (702) and the second limiting block (703), and the air extraction pipe (701) is connected to the connecting hole (704).
6. The novel lithium battery electrolyte injection device according to claim 1, characterized in that: The sealing seat (10) is a hollow conical frustum structure, and the bottom of the sealing seat (10) is in contact with the lithium battery (11).