Lithium battery liquid injection nozzle structure capable of preventing pollution of liquid injection hole

Abstract

The utility model discloses a kind of lithium battery liquid injection nozzle structures of liquid injection hole anti-pollution, including lithium battery outer shell, lithium battery outer shell top is provided with top cover, the top cover top side is uniformly provided with liquid injection port, one end of liquid injection port is communicated with lithium battery outer shell and lithium battery outer shell interior and is communicated by penetrating top cover and lithium battery outer shell, the inner wall of liquid injection port is fixedly connected with self-sealing sheet, self-sealing sheet is annular about the inner wall of liquid injection port, self-sealing sheet is conical structure, self-sealing sheet outer wall is equipped with collar, collar is movably connected with self-sealing sheet, collar one end is connected with the inner wall of liquid injection port, the outer wall of liquid injection port is provided with vibration plate, the outside of vibration plate is fixedly connected with ultrasonic transducer, ultrasonic transducer and vibration plate are electrically connected, ultrasonic transducer and vibration plate are about the bisecting line of liquid injection port and are left-right symmetrical distribution, ultrasonic transducer is about the outside of vibration plate and is provided with multiple. The device can avoid the inside of liquid injection port being polluted, to ensure the liquid injection quality of lithium battery.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery liquid filling technology, specifically to a lithium battery liquid filling nozzle structure with anti-pollution filling hole. Background Technology

[0002] The electrolyte injection nozzle is a key component used to inject electrolyte into the lithium battery. In the manufacturing process of lithium-ion batteries, the precise injection of electrolyte is crucial to ensuring battery performance, lifespan, and safety.

[0003] Currently, lithium battery filling nozzles are typically open-type, exposed to air before the needle is inserted. This makes the inside of the filling nozzle prone to contamination, affecting the quality of the lithium battery filling, and requires improvement. Utility Model Content

[0004] The purpose of this invention is to provide a lithium battery filling nozzle structure with anti-contamination filling hole, so as to solve the problem mentioned in the background art that the inside of the lithium battery filling nozzle is easily contaminated when directly exposed to the air.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a lithium battery injection nozzle structure with anti-pollution injection hole, comprising a lithium battery shell, a top cover on the top of the lithium battery shell, and injection ports on the top side of the top cover. One end of the injection port penetrates the top cover and the lithium battery shell and communicates with the interior of the lithium battery shell. A self-sealing sheet is fixedly connected to the inner wall of the injection port. The self-sealing sheet is distributed in a ring around the inner wall of the injection port and has a conical structure. A collar is fitted on the outer wall of the self-sealing sheet. The collar and the self-sealing sheet are movably connected. One end of the collar is connected to the inner wall of the injection port. A vibration plate is provided on the outer wall of the injection port.

[0006] Preferably, an ultrasonic transducer is fixedly connected to the outside of the vibrating plate, and multiple ultrasonic transducers are arranged on the outside of the vibrating plate.

[0007] Preferably, the ultrasonic transducer and the vibrating plate are electrically connected, and both the ultrasonic transducer and the vibrating plate are symmetrically distributed about the bisector of the injection port.

[0008] Preferably, the self-sealing sheet is made of fluororubber, and the top of the self-sealing sheet is adhered and fixed to the inner wall of the injection port.

[0009] Preferably, the outer wall of the collar is fixedly connected with a connecting elastic post, and multiple connecting elastic posts are distributed at equal intervals in a circular pattern about the outer wall of the collar, with one end of the connecting elastic post being fixedly connected to the inner wall of the injection port.

[0010] Preferably, a support spring is fixedly connected to the inner wall of the collar, and one end of the support spring is connected to a bonding block. The bonding block has an inclined structure, and the inner side of the bonding block is bonded to the outer wall of the self-sealing sheet.

[0011] Preferably, a sealing cap is provided at the top of the injection port, and the sealing cap matches the top structure of the injection port.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) This device can prevent the inside of the liquid injection port from being contaminated, thereby ensuring the quality of the liquid injection of the lithium battery.

[0014] (2) This device uses a tapered self-sealing plate on the inner wall of the injection port. Since the self-sealing plate is made of fluororubber, it has a certain elasticity. When the needle is inserted, it can support the opening of the self-sealing plate. When the needle is withdrawn, the self-sealing plate will automatically reset and close under the action of elasticity, thereby preventing the inside of the injection port from being directly exposed to the air, ensuring the quality of the electrolyte inside the injection port and preventing contamination.

[0015] (3) This device uses ultrasonic waves to vibrate the injection port, collar and self-sealing sheet by setting a vibrating plate and an ultrasonic transducer on the outside of the injection port, thereby accelerating the flow of electrolyte and reducing electrolyte residue on the injection port and self-sealing sheet. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the structure of a lithium battery injection nozzle with anti-pollution injection hole according to the present invention;

[0017] Figure 2 This utility model relates to a lithium battery filling nozzle structure with anti-pollution filling hole. Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 This is a top view of the collar structure of a lithium battery injection nozzle with anti-pollution injection hole according to the present invention;

[0019] Figure 4 This is a top view of a self-sealing sheet for a lithium battery injection nozzle structure that prevents contamination of the injection hole, according to this utility model.

[0020] Figure 5 This is a top view of the structure of a lithium battery injection nozzle with anti-pollution injection hole according to the present invention.

[0021] In the diagram: 1. Top cover; 2. Lithium battery casing; 3. Injection port; 4. Sealing cap; 5. Self-sealing sheet; 6. Collar; 7. Ultrasonic transducer; 8. Connecting elastic column; 9. Vibrating plate; 10. Supporting spring; 11. Adhesive block. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-5This utility model provides a technical solution: a lithium battery filling nozzle structure with anti-pollution filling hole, including a lithium battery shell 2, a top cover 1 on the top of the lithium battery shell 2, and filling ports 3 on both sides of the top cover 1. A sealing cap 4 is provided on the top of each filling port 3, and the sealing cap 4 matches the top structure of the filling port 3. This structure allows the filling port 3 to be sealed after the filling process is completed. The sealing cap 4 is tightly connected to the filling port 3 by applying pressure. One end of the filling port 3 passes through the top cover 1 and the lithium battery shell 2, communicating with the interior of the lithium battery shell 2. A self-sealing sheet 5 is fixedly connected to the inner wall of the filling port 3. The sealing sheet 5 is made of fluororubber. The top of the self-sealing sheet 5 is adhered and fixed to the inner wall of the injection port 3. This structure provides a certain degree of corrosion protection through the self-sealing sheet 5. Simultaneously, the elasticity of the self-sealing sheet 5 keeps its lower end closed, thus preventing contamination of the injection port 3. The self-sealing sheets 5 are arranged in a ring around the inner wall of the injection port 3. The self-sealing sheet 5 has a conical structure, and a collar 6 is fitted onto the outer wall of the self-sealing sheet 5. Connecting elastic posts 8 are fixedly connected to the outer wall of the collar 6. Multiple connecting elastic posts 8 are evenly spaced in a ring around the outer wall of the collar 6. One end of each connecting elastic post 8 is fixedly connected to the inner wall of the injection port 3. This structure... The connecting elastic post 8 can elastically connect the collar 6 to the injection port 3, thereby facilitating the vibration of the vibrating plate 9 to drive the collar 6 to vibrate. A support spring 10 is fixedly connected to the inner wall of the collar 6, and one end of the support spring 10 is connected to a bonding block 11. The bonding block 11 has an inclined structure, and the inner side of the bonding block 11 is bonded to the outer wall of the self-sealing sheet 5. This structure, through the support spring 10, can support the bonding block 11 to bond to the outer wall of the self-sealing sheet 5, thereby driving the self-sealing sheet 5 to vibrate during the overall vibration of the collar 6, thereby accelerating the flow of electrolyte on the self-sealing sheet 5 into the lithium battery casing 2. The collar 6 and the self-sealing sheet 5 are movably connected. One end of the device is connected to the inner wall of the injection port 3. A vibrating plate 9 is provided on the outer wall of the injection port 3. An ultrasonic transducer 7 is fixedly connected to the outer side of the vibrating plate 9. Multiple ultrasonic transducers 7 are arranged on the outer side of the vibrating plate 9. This structure ensures the uniformity of vibration of the vibrating plate 9. The ultrasonic transducer 7 and the vibrating plate 9 are electrically connected. The ultrasonic transducer 7 and the vibrating plate 9 are symmetrically distributed about the bisector of the injection port 3. This structure can convert ultrasonic waves into mechanical energy through the ultrasonic transducer 7 and the vibrating plate 9 to vibrate the injection port 3, the collar 6, and the connecting elastic column 8. During use, the ultrasonic transducer 7 can be electrically connected to the lithium battery.

[0024] Working principle: When using the lithium battery filling nozzle structure with anti-contamination filling hole, the needle is first inserted into the self-sealing plate 5 inside the filling port 3. At this time, under the action of extrusion force, the lower end of the self-sealing plate 5 opens to both sides. After the filling is completed, the needle is reset and the self-sealing plate 5 is automatically reset. Then the ultrasonic transducer 7 is started, and the filling port 3 vibrates under the action of the vibrating plate 9. At the same time, the connecting elastic column 8 drives the collar 6 and the self-sealing plate 5 to vibrate, thereby accelerating the flow of electrolyte on the self-sealing plate 5 and the filling port 3 into the lithium battery casing 2, avoiding serious contamination of the filling port 3.

[0025] 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 lithium battery filling nozzle structure with anti-contamination filling hole, comprising a lithium battery housing (2), wherein a top cover (1) is provided on the top of the lithium battery housing (2), characterized in that: The top cover (1) is provided with a liquid injection port (3) on the top side. One end of the liquid injection port (3) passes through the top cover (1) and the lithium battery shell (2) and communicates with the inside of the lithium battery shell (2). A self-sealing plate (5) is fixedly connected to the inner wall of the liquid injection port (3). The self-sealing plate (5) is distributed in a ring about the inner wall of the liquid injection port (3). The self-sealing plate (5) has a conical structure. A collar (6) is sleeved on the outer wall of the self-sealing plate (5). The collar (6) is movably connected to the self-sealing plate (5). One end of the collar (6) is connected to the inner wall of the liquid injection port (3). A vibration plate (9) is provided on the outer wall of the liquid injection port (3).

2. The lithium battery filling nozzle structure with anti-pollution filling hole according to claim 1, characterized in that: An ultrasonic transducer (7) is fixedly connected to the outside of the vibrating plate (9), and multiple ultrasonic transducers (7) are arranged on the outside of the vibrating plate (9).

3. The lithium battery filling nozzle structure with anti-pollution filling hole according to claim 2, characterized in that: The ultrasonic transducer (7) and the vibrating plate (9) are electrically connected. Both the ultrasonic transducer (7) and the vibrating plate (9) are symmetrically distributed about the bisector of the injection port (3).

4. The lithium battery filling nozzle structure with anti-pollution filling hole according to claim 1, characterized in that: The self-sealing sheet (5) is made of fluororubber, and the top of the self-sealing sheet (5) is attached and fixed to the inner wall of the injection port (3).

5. The lithium battery filling nozzle structure with anti-pollution filling hole according to claim 1, characterized in that: The outer wall of the collar (6) is fixedly connected to a connecting elastic column (8). Multiple connecting elastic columns (8) are distributed in a circular pattern at equal intervals about the outer wall of the collar (6). One end of the connecting elastic column (8) is fixedly connected to the inner wall of the injection port (3).

6. The lithium battery filling nozzle structure with anti-pollution filling hole according to claim 1, characterized in that: A support spring (10) is fixedly connected to the inner wall of the collar (6). One end of the support spring (10) is connected to a bonding block (11). The bonding block (11) has an inclined structure, and the inner side of the bonding block (11) is bonded to the outer wall of the self-sealing sheet (5).

7. The lithium battery filler nozzle structure for preventing contamination of the filler hole according to claim 1, characterized in that: The top of the injection port (3) is provided with a sealing cap (4), which matches the top structure of the injection port (3).

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