Liquid injection nozzle

Abstract

The utility model relates to the technical field of batteries, in particular to a liquid injection nozzle which comprises a liquid injection nozzle body and an arched diaphragm, the liquid injection nozzle body is provided with a liquid injection channel from an inlet to an outlet, the arched diaphragm is arranged in the liquid injection channel and seals the liquid injection channel, the arched diaphragm is provided with a liquid outlet hole capable of being opened and closed, and the arched diaphragm protrudes from the outlet to the inlet side. According to the liquid injection nozzle provided by the utility model, on the basis of ensuring simple, convenient and feasible process manufacturing, residual electrolyte is prevented from dripping to pollute a battery after liquid injection is finished, and the phenomenon that the inner cavity of the liquid injection nozzle is broken to block the liquid injection opening due to stress concentration is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a liquid injection nozzle. Background Art

[0002] A battery generally consists of a positive electrode, a negative electrode, and an electrolyte. The electrolyte plays a role in transporting ions between the positive and negative electrodes, and it has an important impact on the battery's capacity, operating temperature range, cycle performance, and safety performance, etc. The injection of the electrolyte needs to be completed through a liquid injection nozzle. The liquid injection nozzle can refer to the utility model patent with the application number CN202322026368.2 and the name of a liquid injection nozzle structure for preventing dripping. Since the liquid injection nozzle is in communication with the liquid injection conduit, after the injection of the electrolyte is completed and closed, the residual electrolyte inside the device will flow along the pipeline and converge at the liquid injection nozzle and drip from the liquid injection nozzle opening under the action of gravity, causing the surface of the battery to be contaminated by the electrolyte. In order to prevent pollution caused by liquid spraying, a diaphragm structure needs to be designed to block the flow and dripping of the residual liquid. The traditional diaphragm structure undergoes permanent deformation after being used for a period of time, resulting in an increase in the originally closed gap and the failure of the anti-dripping effect. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is: to provide a liquid injection nozzle structure for preventing dripping.

[0004] In order to solve the above technical problem, the technical solution adopted by the utility model is: a liquid injection nozzle, including a liquid injection nozzle body and an arched diaphragm. The liquid injection nozzle body is provided with a liquid injection channel from the inlet to the outlet. The arched diaphragm is arranged in the liquid injection channel and closes the liquid injection channel. The arched diaphragm is provided with an openable and closable liquid outlet hole, and the arched diaphragm bulges from the outlet to the inlet side.

[0005] Further, the liquid injection nozzle body and the arched diaphragm are integrally formed.

[0006] Further, both the two surfaces of the arched diaphragm facing the inlet and the outlet are spherical surfaces.

[0007] Further, there is a chamfer between the arched diaphragm and the side wall of the liquid injection channel.

[0008] Further, the thickness of the arched diaphragm gradually increases from the middle to the edge.

[0009] Further, the liquid outlet hole is arranged in the middle of the arched diaphragm, and the shape of the liquid outlet hole is cross-shaped.

[0010] The beneficial effects of the present utility model are as follows: The dripping during the liquid injection process of the liquid injection nozzle is mainly due to the unobstructed residual electrolyte liquid, and the residual liquid gathers and drips due to its own weight. The present utility model adds a diaphragm structure to the inner cavity of the liquid injection nozzle, and the diaphragm is designed as an arched shape protruding towards the side where the inlet is located, so that the residual electrolyte liquid cannot drip due to its own weight. During normal liquid injection, only the positive pressure of liquid injection can open the diaphragm for normal liquid injection work. With this structural design, the force received in the middle of the diaphragm is dispersed, enhancing the overall structure and making it less prone to deformation. On the basis of ensuring the simplicity and feasibility of the process production, it realizes blocking the dripping of the residual electrolyte liquid to pollute the battery after liquid injection, and is not easy to cause the inner cavity of the liquid injection nozzle to rupture and block the liquid injection port due to concentrated force. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the liquid injection nozzle;

[0012] Figure 2 is a cross-sectional view of the liquid injection nozzle;

[0013] Reference numerals description:

[0014] 1. Liquid injection nozzle body; 11. Inlet; 12. Outlet; 13. Liquid injection channel; 2. Arch-shaped diaphragm; 21. Liquid outlet hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] To describe in detail the technical content, the achieved purpose and the effects of the present utility model, the following is described in conjunction with the embodiments and with reference to the accompanying drawings.

[0016] The present utility model provides a liquid injection nozzle for use in an electrolyte liquid injection device.

[0017] Please refer to Figures 1 to 2 As shown, a liquid injection nozzle of the present utility model includes a liquid injection nozzle body 1 and an arch-shaped diaphragm 2. The liquid injection nozzle body 1 is provided with a liquid injection channel 13 from the inlet 11 to the outlet 12. The arch-shaped diaphragm 2 is arranged in the liquid injection channel 13 and closes the liquid injection channel 13. The arch-shaped diaphragm 2 is provided with an openable and closable liquid outlet hole 21, and the arch-shaped diaphragm 2 protrudes from the outlet 12 towards the inlet 11 side.

[0018] As can be seen from the above description, the beneficial effects of the present utility model are as follows: The dripping during the liquid injection process of the liquid injection nozzle is mainly due to the unobstructed residual electrolyte liquid, and the residual liquid gathers and drips due to its own weight. The present utility model adds a diaphragm structure to the inner cavity of the liquid injection nozzle, and the diaphragm is designed as an arched shape convex to the side where the inlet 11 is located, so that the residual electrolyte liquid cannot drip due to its own weight. During normal liquid injection, only the positive pressure of liquid injection can open the diaphragm for normal liquid injection work. With this structural design, the force received in the middle of the diaphragm is dispersed, making the overall structure stronger and less prone to deformation. On the basis of ensuring that the process production is simple and feasible, it realizes blocking the dripping of residual electrolyte liquid to pollute the battery after liquid injection is completed, and is not prone to the inner cavity of the liquid injection nozzle being cracked and blocked due to concentrated force.

[0019] In an alternative embodiment, the liquid injection nozzle body 1 and the arched diaphragm 2 are integrally formed.

[0020] As can be seen from the above description, in the traditional liquid injection nozzle, the inner cavity is in direct contact with the installation guide post. When pressing down during the use of the liquid injection nozzle, the pressure is concentrated on the installation platform of the inner cavity, which is prone to cause the platform to crack. The diaphragm structure of the present utility model is integrally formed in the liquid injection channel 13 near the outlet 12 of the liquid injection nozzle body 1. The distance between the diaphragm and the outlet 12 is shortened, dispersing more compressive force and ensuring that the inner cavity installation platform does not crack.

[0021] In an alternative embodiment, both surfaces of the arched diaphragm 2 facing the inlet 11 and the outlet 12 are spherical surfaces.

[0022] As can be seen from the above description, designing it as a spherical surface can not only prevent the liquid injection nozzle from leaking and polluting the battery surface, but also ensure that the inner cavity installation platform does not crack.

[0023] In an alternative embodiment, there is a chamfer between the arched diaphragm 2 and the side wall of the liquid injection channel 13.

[0024] As can be seen from the above description, a chamfer is made at the edge connection part of the arched diaphragm 2 to provide enough opening space for the diaphragm. Since the inner cavity core of the mold collides at the edge of the diaphragm, when manufacturing, the mold core needs to be withdrawn from the liquid injection port, so the chamfer should not be too large, otherwise it will cause the forced withdrawal of the liquid injection port to crack.

[0025] In an alternative embodiment, the thickness of the arched diaphragm 2 gradually increases from the middle to the edge.

[0026] As can be seen from the above description, the increased thickness at the edge of the arched diaphragm 2 strengthens the overall structure and makes it less prone to deformation.

[0027] In an alternative embodiment, the liquid outlet hole 21 is arranged in the middle of the arched diaphragm 2, and the shape of the liquid outlet hole 21 is cross-shaped.

[0028] As can be seen from the above description, a cross-shaped cut is made at the middle position of the diaphragm for liquid outlet.

[0029] Please refer to Figures 1 to 2 As shown, Embodiment 1 of the present utility model is: a liquid injection nozzle, which includes a liquid injection nozzle body 1 and an arched diaphragm 2. The liquid injection nozzle body 1 is provided with a liquid injection channel 13 from the inlet 11 to the outlet 12. The arched diaphragm 2 is arranged in the liquid injection channel 13 and closes the liquid injection channel 13. The arched diaphragm 2 is provided with an openable and closable liquid outlet hole 21. The arched diaphragm 2 protrudes from the outlet 12 towards the inlet 11 side.

[0030] The liquid injection nozzle body 1 and the arched diaphragm 2 are integrally formed. The two surfaces of the arched diaphragm 2 facing the inlet 11 and the outlet 12 are both spherical surfaces. There is a chamfer between the arched diaphragm 2 and the side wall of the liquid injection channel 13. The thickness of the arched diaphragm 2 gradually increases from the middle to the edge. The liquid outlet hole 21 is arranged in the middle of the arched diaphragm 2, and the shape of the liquid outlet hole 21 is cross-shaped.

[0031] In summary, the present utility model adds a diaphragm structure to the inner cavity of the liquid injection nozzle, and designs the diaphragm as an arched shape protruding towards the side where the inlet is located, so that the residual electrolyte liquid cannot drip due to its own weight. During normal liquid injection, only the positive pressure of liquid injection is required to open the diaphragm for normal liquid injection work. By adopting this structural design, the force received in the middle of the diaphragm is dispersed, the overall structure is strengthened, and it is less likely to deform. On the basis of ensuring that the process production is simple and feasible, it realizes blocking the dripping of residual electrolyte liquid to pollute the battery after liquid injection, and is not likely to cause the inner cavity of the liquid injection nozzle to rupture and block the liquid injection port due to concentrated force.

[0032] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. All equivalent transformations made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in related technical fields, are similarly included in the patent protection scope of the present utility model.

Claims

1. A liquid injection nozzle, characterized in that: The invention comprises a liquid injection nozzle body and an arched diaphragm. The liquid injection nozzle body is provided with a liquid injection channel from the inlet to the outlet. The arched diaphragm is arranged in the liquid injection channel and closes the liquid injection channel. The arched diaphragm is provided with an openable and closable liquid outlet hole. The arched diaphragm protrudes from the outlet to the inlet side.

2. The liquid injection nozzle according to claim 1, characterized in that: The liquid injection nozzle body and the arched diaphragm are integrally formed.

3. The liquid injection nozzle according to claim 1, characterized in that: The two surfaces of the arched diaphragm facing the inlet and the outlet are both spherical surfaces.

4. The liquid injection nozzle according to claim 1, characterized in that: A chamfer is provided between the arched diaphragm and the side wall of the injection channel.

5. The liquid injection nozzle according to claim 1, characterized in that: The thickness of the arched diaphragm gradually increases from the middle to the edge.

6. The liquid injection nozzle according to claim 1, characterized in that: The liquid outlet hole is arranged in the middle of the arched diaphragm, and the shape of the liquid outlet hole is a cross.

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