Liquid injection device for preventing residual electrolyte dropping

Abstract

The utility model discloses a liquid injection device capable of preventing residual electrolyte dropping, which comprises a liquid injection needle body, a liquid injection nozzle, a liquid injection nozzle, a liquid injection nozzle, a liquid injection nozzle, a liquid injection nozzle and a liquid injection nozzle, and is characterized in that liquid outlets are symmetrically formed in the side wall of the lower end of the liquid injection needle body; the liquid injection needle body is sleeved with the check block in a sliding mode; the spring is arranged on the stop block so as to push the stop block to shield the liquid outlet after liquid injection; the connector is detachably mounted at the top end of the liquid injection needle body so as to be connected with an external liquid injection valve; by arranging the liquid injection needle body, the check block, the connector, the spring and the liquid outlet, the situation that after liquid injection is conducted through a traditional liquid injection needle, an outlet of the liquid injection needle is inconvenient to seal, and consequently residual electrolyte drips all around is avoided, the liquid outlet can be well opened during liquid injection, the liquid outlet is sealed after liquid injection, and the liquid injection needle is convenient to use. And liquid dropping and liquid leakage after liquid injection are prevented, the structure is simple, use is convenient, and the practicability of the device is improved.

Description

Technical Field

[0001] This utility model specifically relates to a liquid injection device for preventing residual electrolyte dripping. Background Technology

[0002] Electrolyte is a crucial component in lithium batteries, responsible for carrying lithium ions. It acts as both a carrier and a conductor for lithium ion movement, essential for charge transfer. Electrolyte is typically injected into lithium batteries during production. However, during injection, factors such as electrolyte residue on the injection needle or wear on the injection valve often result in residual electrolyte dripping from the needle outlet after injection. Furthermore, because electrolyte readily crystallizes, these drips create a poor working environment and are difficult to clean. Therefore, we propose an injection device to prevent residual electrolyte dripping. Utility Model Content

[0003] The purpose of this invention is to provide an electrolyte injection device that prevents residual electrolyte dripping, thereby solving the problem mentioned in the background art where existing electrolyte injection needles leave residual electrolyte dripping after injection, causing inconvenience for subsequent on-site cleaning.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a liquid injection device for preventing electrolyte residue dripping, comprising:

[0005] The injection needle body has symmetrically arranged liquid outlets on the side wall at the lower end of the injection needle body;

[0006] The stop block is slidably fitted onto the injection needle body;

[0007] A spring is mounted on the stop block to push the stop block to block the outlet after liquid injection;

[0008] The connector is detachably mounted on the top of the injection needle body to connect to an external injection valve;

[0009] The design allows the injection needle to be inserted into the injection port, which then pushes the stop block upwards, compressing the spring to allow the liquid to leak out. After injection, the spring returns to its original length, pushing the stop block to block and seal the liquid outlet, thus preventing residual electrolyte from dripping everywhere.

[0010] Preferably, the injection needle has a connecting cavity on its inner side that communicates with the inside of the connector, and the lower end of the connecting cavity corresponds to the liquid outlet.

[0011] Preferably, the injection needle has a connecting cavity on its inner side that communicates with the inside of the connector, and the lower end of the connecting cavity corresponds to the liquid outlet;

[0012] This facilitates the flow of electrolyte through the connecting cavity to the outlet for filling the external sleeve cup.

[0013] Preferably, the upper edge of the stop is provided with a flange to restrict the left and right movement of the spring, so as to better restrict the left and right movement of the lower end of the spring and keep the spring in a vertical state.

[0014] Preferably, the upper end of the outer surface of the injection needle is provided with an external thread, and the inner side of the connector is provided with an internal thread that mates with the external thread, which facilitates quick installation of the connector and improves the convenience of later maintenance.

[0015] Preferably, the connector has a liquid inlet, and the liquid inlet is conical, so that the electrolyte inside the valve body can flow better into the connecting cavity through the connector during liquid injection.

[0016] Preferably, there are two outlets, and the two outlets are coaxial, which facilitates the injection of liquid to the outside.

[0017] Preferably, the inner diameter of the baffle is equal to the outer diameter of the injection needle body, which facilitates rapid sealing of the outlet.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This utility model, by incorporating an injection needle body, a stop block, a connector, a spring, and an outlet, avoids the problem of traditional injection needles where it is inconvenient to seal the outlet after injection, leading to residual electrolyte dripping everywhere. This device can effectively open the outlet during injection and seal it after injection, preventing dripping and leakage. It has a simple structure, is easy to use, and improves the practicality of the device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0022] Figure 3 This is a cross-sectional view of the injection needle body of this utility model.

[0023] In the diagram: 1. Injection needle body; 2. Stop block; 3. Connector; 4. Spring; 5. Flange; 6. Inlet; 7. External thread; 8. Connecting cavity; 9. Outlet. Detailed Implementation

[0024] 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.

[0025] Please see Figures 1-3 This utility model provides a technical solution: a liquid injection device for preventing electrolyte residue dripping, comprising:

[0026] The injection needle body 1 has symmetrically opened outlets 9 on the side wall at the lower end of the injection needle body 1;

[0027] The stop block 2 is slidably sleeved on the injection needle body 1;

[0028] Spring 4 is mounted on stop 2 to push stop 2 to block liquid outlet 9 after liquid injection;

[0029] Connector 3 is detachably mounted on the top of injection needle body 1 to connect to an external injection valve;

[0030] This allows the outlet 9 to be blocked and sealed by the baffle 2 after liquid injection, so as to prevent residual electrolyte at the outlet 9 from dripping everywhere.

[0031] In this embodiment, preferably, the inner side of the injection needle body 1 is provided with a connecting cavity 8 that communicates with the inside of the connector 3, and the lower end of the connecting cavity 8 corresponds to the liquid outlet 9.

[0032] This facilitates the flow of electrolyte through the connecting cavity 8 to the outlet 9 for filling the external sleeve cup.

[0033] In this embodiment, preferably, the upper edge of the stop block 2 is provided with a flange 5 to restrict the left and right movement of the spring 4, so as to better restrict the left and right movement of the lower end of the spring 4.

[0034] In this embodiment, preferably, the upper end of the outer surface of the injection needle body 1 is provided with an external thread 7, and the inner side of the connector 3 is provided with an internal thread that mates with the external thread 7, so as to facilitate the quick installation of the connector 3.

[0035] In this embodiment, preferably, the connector 3 has a liquid inlet 6, and the liquid inlet 6 is conical, so that the electrolyte inside the valve body can flow into the inner side of the connecting cavity 8 through the connector 3 better during liquid injection.

[0036] In this embodiment, preferably, there are two outlets 9, and the two outlets 9 are coaxial, which facilitates the injection of liquid to the outside.

[0037] In this embodiment, preferably, the inner diameter of the baffle 2 is equal to the outer diameter of the injection needle body 1, which facilitates the rapid sealing of the outlet 9.

[0038] The working principle and usage process of this utility model are as follows: In use, the injection needle body 1 is connected to the valve body for injecting electrolyte through the connector 3. The outlet 9 at the lower end of the injection needle body 1 is inserted into the injection cup. At this time, the injection hole of the injection cup will push the stop 2 to rise. The stop 2 will squeeze the spring 4. The outlet 9 is connected to the inner cavity of the injection cup. The electrolyte sprayed from the valve body enters the inner cavity of the cup through the connector 3, the connecting cavity 8 and the outlet 9 in sequence. After injection, the valve body drives the injection needle body 1 to detach from the inside of the cup. At this time, the spring 4 returns to its length and pushes the stop 2 to block the outlet 9, preventing the electrolyte remaining at the outlet 9 from dripping everywhere and affecting the surrounding environment.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid injection device for preventing residual electrolyte dripping, characterized in that, include: The injection needle body (1) has symmetrically provided liquid outlets (9) on the side wall at the lower end of the injection needle body (1); The stop block (2) is slidably sleeved on the injection needle body (1); A spring (4) is provided on the stop block (2) to push the stop block (2) to block the outlet (9) after liquid injection; The connector (3) is detachably installed on the top of the injection needle body (1) to connect to an external injection valve.

2. The liquid injection device for preventing electrolyte residue dripping according to claim 1, characterized in that: The injection needle body (1) has a connecting cavity (8) that communicates with the inside of the connector (3), and the lower end of the connecting cavity (8) corresponds to the liquid outlet (9).

3. The liquid injection device for preventing residual electrolyte dripping according to claim 1, characterized in that: The upper edge of the stop (2) is provided with a flange (5) to restrict the left and right movement of the spring (4).

4. The liquid injection device for preventing electrolyte residue dripping according to claim 1, characterized in that: The upper end of the outer surface of the injection needle body (1) is provided with an external thread (7), and the inner side of the connector (3) is provided with an internal thread that mates with the external thread (7).

5. The liquid injection device for preventing residual electrolyte dripping according to claim 1, characterized in that: The connector (3) has a liquid inlet (6), and the liquid inlet (6) is conical.

6. The electrolyte injection device for preventing residual electrolyte dripping according to claim 1, characterized in that: The liquid outlet (9) is provided in two places, and the two liquid outlets (9) are coaxial.

7. The liquid injection device for preventing residual electrolyte dripping according to claim 1, characterized in that: The inner diameter of the stop (2) is equal to the outer diameter of the injection needle (1).

Images