Liquid supplementing structure for lithium battery cover plate

Abstract

The utility model provides a liquid supplementing structure for a lithium battery cover plate, which relates to the technical field of lithium battery cover plates and comprises a cover plate body, a first liquid injection port is arranged at the center of the top of the cover plate body, the inner surface of the first liquid injection port is in threaded connection with a sealing cover, and the inner surface of the first liquid injection port is fixedly connected with a sealing element close to the center. According to the utility model, the sealing cover, the convex block, the sealing piece, the fixed frame, the sliding rod, the first liquid injection port, the second liquid injection port, the second sealing gasket, the first sealing gasket and the rotating seat are matched for use, when the sealing cover is taken out, the second liquid injection port is leaked under the acting force of the spring, and then electrolyte is supplemented to the battery through the second liquid injection port and the first liquid injection port; after the sealing cover is arranged at the second liquid injection opening, the rotating seat can apply extrusion force to the sealing block, so that under the cooperation of threaded connection of the sealing cover, the first sealing gasket and the second sealing gasket, the sealing performance is ensured, liquid injection is convenient, and the liquid injection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery covers, in particular to a liquid supplementing structure for a lithium battery cover. Background Art

[0002] The service life and safety of batteries are the key concerns of people for lithium-ion batteries. However, due to the limited internal space of square batteries, the injection amount of electrolyte is restricted and will gradually be consumed and reduced during use, greatly reducing the service life of the batteries. Therefore, supplementing the electrolyte is of great significance for improving the service life of the batteries.

[0003] Existing, such as the lithium battery cover with the Chinese patent number: CN218039481U, includes a liquid supplementing hole provided on the lithium battery cover, including a first stepped hole and a second stepped hole, the diameter of the first stepped hole is larger than that of the second stepped hole; an annular groove provided on the lithium battery cover around the first stepped hole in the liquid supplementing hole, the diameter of the annular groove is larger than that of the first stepped hole; and also includes a liquid supplementing structure for sealing the liquid supplementing hole including the first stepped hole and the second stepped hole on the lithium battery cover, wherein the diameter of the first stepped hole is larger than that of the second stepped hole; the liquid supplementing structure includes: a first seal, a third seal and a second seal, the second seal is used for sealing the second stepped hole on the lithium battery cover; the third seal is used for sealing the first stepped hole on the lithium battery cover; the first seal covers the third seal. The lithium battery cover can supplement the liquid for the battery and ensure the sealing performance of the battery before and after liquid supplementation, which not only improves the service life of the battery but also ensures the safety and reliability of the battery.

[0004] In the above patent, the lithium battery cover can supplement the liquid for the battery and ensure the sealing performance of the battery before and after liquid supplementation, which not only improves the service life of the battery but also ensures the safety and reliability of the battery. However, during subsequent liquid supplementation, it is not convenient to disassemble the first seal, resulting in difficult liquid supplementation and reduced liquid supplementation efficiency.

[0005] Therefore, a new liquid supplementing structure for a lithium battery cover needs to be proposed. Summary of the Utility Model

[0006] The utility model mainly provides a liquid supplementing structure for a lithium battery cover that is convenient for improving the liquid supplementing efficiency and ensuring the sealing performance.

[0007] To achieve the above object, the utility model adopts the following technical solutions: A liquid replenishing structure for a lithium battery cover plate, including a cover plate body. A first liquid injection port is opened at the center position of the top of the cover plate body. A sealing cover is threadedly connected to the inner surface of the first liquid injection port. A sealing member is fixedly connected to the inner surface of the first liquid injection port near the center position. A second liquid injection port is opened at the center position of the top of the sealing member. A fixing frame is fixedly connected to the inner surface of the second liquid injection port near the bottom position. A sliding rod movably penetrates through the top of the fixing frame. A sealing block is fixedly connected to the top of the sliding rod. A rotating seat is rotatably connected to the bottom of the sealing cover.

[0008] Preferably, a convex block is fixedly connected to the top of the sealing cover, and a first sealing pad is sleeved on the outer surface of the sealing cover. Through the convex block at the top, it is convenient to rotate the sealing cover. At the same time, under the action of the first sealing pad, the gap between the sealing cover and the cover plate body can be filled to ensure the sealing performance.

[0009] Preferably, a second sealing pad is fixedly connected to the bottom of the sealing block, and a spring is sleeved on the outer surface of the sliding rod. Under the action of the second sealing pad, the gap between the sealing block and the sealing member can be filled to further ensure the sealing performance.

[0010] Preferably, one end of the spring is fixedly connected to the bottom of the sealing block, and the other end of the spring is fixedly connected to the top of the fixing frame. Under the action of the spring force, the sealing block can be driven to move upward to expose the second liquid injection port.

[0011] Preferably, fixing rods are symmetrically and fixedly connected to the bottom of the sliding rod, and guide rods movably penetrate through the top of the fixing frame near both sides. When the sliding rod moves, it will drive the fixing rods to move, so that the guide rods slide along the fixing frame to ensure the stability of the sliding rod during movement.

[0012] Preferably, the bottoms of the two guide rods are respectively fixedly connected to the tops of the two fixing rods. The diameter of the sealing block is larger than the diameter of the second liquid injection port. The inner surface of the second liquid injection port near the top is arc-shaped. The second liquid injection port can be blocked by the sealing block. At the same time, through the arc-shaped setting, it is convenient for the liquid to enter the second liquid injection port through the first liquid injection port.

[0013] Preferably, a first electrode is fixedly connected to the top of the cover plate body near one side, and a second electrode is fixedly connected to the top of the cover plate body near the other side. By using the first electrode and the second electrode in cooperation, it is convenient for the subsequent assembly of the battery.

[0014] Compared with the prior art, the advantages and positive effects of the utility model are as follows.

[0015] 1. In the present utility model, through the combined use of a sealing cover, a convex block, a sealing member, a fixing frame, a sliding rod, a first liquid injection port, a second liquid injection port, a second sealing gasket, a first sealing gasket and a rotating seat, when the sealing cover is taken out, under the action of a spring, the second liquid injection port is exposed, and then the battery is supplemented with electrolyte through the second liquid injection port and the first liquid injection port. When the sealing cover is behind the second liquid injection port, the rotating seat will exert an extrusion force on the sealing block, so that under the cooperation of the threaded connection of the sealing cover, the first sealing gasket and the second sealing gasket, the sealing performance is ensured, the liquid injection is convenient, and the liquid injection efficiency is improved.

[0016] 2. In the present utility model, through the combined use of a guide rod, a fixing frame and a fixing rod, when the sealing block drives the sliding rod to move, it will drive the fixing rod to move, so that the guide rod slides along the fixing frame to ensure the stability of the sliding rod during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional view of a liquid supplementing structure for a lithium battery cover plate proposed by the present utility model;

[0018] Figure 2 is an unfolded view of a liquid supplementing structure for a lithium battery cover plate proposed by the present utility model;

[0019] Figure 3 is a partial structural schematic diagram of a liquid supplementing structure for a lithium battery cover plate proposed by the present utility model;

[0020] Figure 4 is a cross-sectional view of a liquid supplementing structure for a lithium battery cover plate proposed by the present utility model.

[0021] Legend: 1. Cover plate; 2. Sealing cover; 3. First sealing gasket; 4. Convex block; 5. First electrode; 6. Sealing block; 7. Sealing member; 8. Fixing frame; 9. Fixing rod; 10. Sliding rod; 11. First liquid injection port; 12. Second liquid injection port; 13. Second sealing gasket; 14. Guide rod; 15. Spring; 16. Second electrode; 17. Rotating seat. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the following further describes the present utility model with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0023] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0024] Please refer toFigures 1-4 , the present utility model provides a technical solution: a liquid replenishing structure for a lithium battery cover plate, a cover plate body 1, a first liquid injection port 11 is opened at the central position of the top of the cover plate body 1, a sealing cover 2 is threadedly connected to the inner surface of the first liquid injection port 11, a sealing member 7 is fixedly connected to the inner surface of the first liquid injection port 11 near the central position, a second liquid injection port 12 is opened at the central position of the top of the sealing member 7, a fixing frame 8 is fixedly connected to the inner surface of the second liquid injection port 12 near the bottom, a sliding rod 10 movably penetrates through the top of the fixing frame 8, a sealing block 6 is fixedly connected to the top of the sliding rod 10, and a rotating seat 17 is rotatably connected to the bottom of the sealing cover 2.

[0025] As Figure 1 , Figure 2 and Figure 4 shown, a convex block 4 is fixedly connected to the top of the sealing cover 2, a first sealing gasket 3 is sleeved on the outer surface of the sealing cover 2. Through the convex block 4 at the top, it is convenient to rotate the sealing cover 2. At the same time, under the action of the first sealing gasket 3, the gap between the sealing cover 2 and the cover plate body 1 can be filled to ensure the sealing performance.

[0026] As Figure 1 , Figure 2 and Figure 4 shown, a second sealing gasket 13 is fixedly connected to the bottom of the sealing block 6, a spring 15 is sleeved on the outer surface of the sliding rod 10. Under the action of the second sealing gasket 13, the gap between the sealing block 6 and the sealing member 7 can be filled to further ensure the sealing performance.

[0027] As Figures 2-4 shown, one end of the spring 15 is fixedly connected to the bottom of the sealing block 6, and the other end of the spring 15 is fixedly connected to the top of the fixing frame 8. Under the action of the spring 15, the sealing block 6 can be driven to move upward to expose the second liquid injection port 12.

[0028] As Figures 2-4 shown, fixing rods 9 are symmetrically fixedly connected to the bottom of the sliding rod 10, and guide rods 14 movably penetrate through the top of the fixing frame 8 near both sides. When the sliding rod 10 moves, the fixing rods 9 will be driven to move, so that the guide rods 14 slide along the fixing frame 8 to ensure the stability of the sliding rod 10 during movement.

[0029] As Figures 2-4 shown, the bottoms of the two guide rods 14 are respectively fixedly connected to the tops of the two fixing rods 9, the diameter of the sealing block 6 is larger than the diameter of the second liquid injection port 12, and the inner surface of the second liquid injection port 12 near the top is arc-shaped. The second liquid injection port 12 can be blocked by the sealing block 6, and at the same time, through the arc-shaped setting, it is convenient for the liquid to enter the second liquid injection port 12 through the first liquid injection port 11.

[0030] As Figures 1-2As shown in the figure, a first electrode 5 is fixedly connected to a position near one side of the top of the cover plate body 1, and a second electrode 16 is fixedly connected to a position near the other side of the top of the cover plate body 1. By using the first electrode 5 and the second electrode 16 in cooperation, it is convenient for the subsequent assembly of the battery.

[0031] The usage method and working principle of this device: When it is necessary to replenish the electrolyte, the sealing cover 2 is rotated through the convex block 4, so that the sealing cover 2 is screwed out from the first liquid injection port 11. Then, after the sealing block 6 loses the extrusion of the sealing cover 2, under the restoring force of the spring 15 rebounding, the sealing block 6 will drive the sliding rod 10 to move upward, so that the sliding rod 10 will slide along the fixing frame 8. And when the sliding rod 10 slides, it will drive the fixing rod 9 to move, so that the guiding rod 14 slides along the fixing frame 8, ensuring the stability of the sliding rod 10 during movement, so that the sealing block 6 moves upward, exposing the second liquid injection port 12. Then the staff injects the electrolyte into the first liquid injection port 11, and then the electrolyte quickly flows into the second liquid injection port 12 through the arc on the second liquid injection port 12 to replenish the electrolyte of the battery. When the replenishment is completed, by aligning the sealing cover 2 with the first liquid injection port 11, and then rotating the sealing cover 2 through the convex block 4, and screwing and fixing it through the thread on the sealing cover 2 and the thread groove inside the first liquid injection port 11. After the fixing is completed, the first sealing gasket 3 will be extruded, so as to fill the gap between the sealing cover 2 and the cover plate body 1, ensuring the sealing performance. At the same time, when the sealing cover 2 moves downward, it will drive the rotating seat 17 to move downward, so as to exert a downward pressure on the sealing block 6 through the rotating seat 17, driving the spring 15 to be compressed, so that the second liquid injection port 12 can be blocked through the rotating seat 17. At the same time, when the sealing block 6 blocks the second liquid injection port 12, it will drive the second sealing gasket 13 to be extruded, which can fill the gap between the sealing block 6 and the sealing member 7, further ensuring the sealing performance.

[0032] The above are only the preferred embodiments of the present invention, and do not limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A liquid replenishing structure for a lithium battery cover plate, characterized in that: Cover body (1), a first liquid injection port (11) is opened at the center position of the top of the cover body (1), a sealing cover (2) is threadedly connected to the inner surface of the first liquid injection port (11), a sealing member (7) is fixedly connected to the inner surface of the first liquid injection port (11) near the center position, a second liquid injection port (12) is opened at the center position of the top of the sealing member (7), a fixing frame (8) is fixedly connected to the position near the bottom of the inner surface of the second liquid injection port (12), a sliding rod (10) movably penetrates through the top of the fixing frame (8), a sealing block (6) is fixedly connected to the top of the sliding rod (10), and a rotating seat (17) is rotatably connected to the bottom of the sealing cover (2).

2. The liquid replenishing structure for the lithium battery cover plate according to claim 1, characterized in that: A convex block (4) is fixedly connected to the top of the sealing cover (2), and a first sealing gasket (3) is sleeved on the outer surface of the sealing cover (2).

3. The liquid replenishing structure for a lithium battery cover plate according to claim 2, characterized in that: A second sealing gasket (13) is fixedly connected to the bottom of the sealing block (6), and a spring (15) is sleeved on the outer surface of the sliding rod (10).

4. The liquid replenishing structure for a lithium battery cover plate according to claim 3, characterized in that: One end of the spring (15) is fixedly connected to the bottom of the sealing block (6), and the other end of the spring (15) is fixedly connected to the top of the fixing frame (8).

5. The liquid replenishing structure for the lithium battery cover plate according to claim 4, characterized in that: Fixing rods (9) are symmetrically and fixedly connected to the bottom of the sliding rod (10), and guide rods (14) movably penetrate through the positions near both sides of the top of the fixing frame (8).

6. The liquid replenishing structure for the lithium battery cover plate according to claim 5, wherein: The bottoms of the two guide rods (14) are respectively fixedly connected to the tops of the two fixing rods (9), the diameter of the sealing block (6) is larger than the diameter of the second liquid injection port (12), and the position near the top of the inner surface of the second liquid injection port (12) is arranged in an arc shape.

7. The liquid replenishing structure for a lithium battery cover plate according to claim 6, characterized in that: A first electrode (5) is fixedly connected to the position near one side of the top of the cover body (1), and a second electrode (16) is fixedly connected to the position near the other side of the top of the cover body (1).

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