Battery cell liquid injection anti-corrosion equipment

Abstract

The utility model provides a kind of battery cell liquid injection anticorrosion equipment, and protection component includes the outer tube fixed to the liquid injection needle periphery, the bottom end of outer tube is detachably installed with the sealing cylinder coaxial with liquid injection needle;When liquid injection needle injects electrolyte to the liquid injection hole of battery cell, liquid injection needle is inserted into liquid injection hole, sealing cylinder moves downward, and it is sealed to form protective structure on the periphery of liquid injection hole, so that the electrolyte volatilized from liquid injection hole can avoid volatilizing to the rack of battery cell liquid injection device, resulting in the condition of rack corrosion.

Description

Technical Field

[0001] This utility model relates to the field of battery cell liquid injection technology, and in particular to a battery cell liquid injection anti-corrosion device. Background Technology

[0002] Existing battery cell electrolyte injection devices inject electrolyte by inserting an injection needle into the injection hole. During the injection process, air containing electrolyte is expelled from the electrolyte chamber. After large-scale injection in the factory, the evaporated electrolyte will corrode the frame of the battery cell electrolyte injection device. Therefore, a battery cell electrolyte injection anti-corrosion device is proposed. Utility Model Content

[0003] To address at least one of the aforementioned technical shortcomings, this utility model provides a battery cell liquid injection corrosion prevention device, including a protective component. The protective component includes an outer cylinder fixed around the injection needle, and a sealing cylinder coaxial with the injection needle is detachably installed at the bottom end of the outer cylinder.

[0004] Furthermore, the bottom end of the outer cylinder is provided with a T-shaped snap-fit ​​groove, and the top end of the sealing cylinder is provided with a snap-fit ​​block that snaps into the snap-fit ​​groove.

[0005] Furthermore, it also includes a low-pressure tank fixed on the liquid injection device frame, with a recovery pipe fixedly connected to one end of the low-pressure tank, and connecting pipes fixedly connected to the outer walls of several outer cylinders. Several connecting pipes are connected to the recovery pipe, and a one-way valve is provided on the recovery pipe.

[0006] Furthermore, the other end of the low-pressure tank is connected to a removable recovery tank via a conduit, which is equipped with a check valve and a pump.

[0007] Furthermore, the sealing cylinder is made of a flexible, corrosion-resistant sealing material.

[0008] Furthermore, the recovery tank is connected to the end of the conduit via a flange connection mechanism.

[0009] Furthermore, a pressure sensor is installed inside the low-pressure tank. Beneficial effects

[0010] When the injection needle injects electrolyte into the injection hole of the battery cell, it inserts into the injection hole, and the sealing cylinder moves downward, pressing against the outside of the injection hole to form a sealed protective structure. This prevents the electrolyte evaporating from the injection hole from evaporating onto the frame of the battery cell injection device, thus avoiding frame corrosion.

[0011] When air containing electrolyte volatiles enters the recovery pipe from the inside of the outer cylinder through the connecting pipe, the air containing electrolyte volatiles will naturally flow into the low-pressure tank because the inside of the low-pressure tank is under negative pressure, and the one-way valve prevents backflow.

[0012] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall installation of this utility model.

[0014] Figure 2 This is an isometric view of the entire utility model.

[0015] Figure 3 This is an isometric view of the protective component of this utility model.

[0016] Figure 4 This is a cross-sectional view of the protective component of this utility model.

[0017] exist Figures 1 to 4 The correspondence between the component names or lines and the attached drawing numbers is as follows: 1. Recycling tank; 2. Low-pressure tank; 21. Recycling pipe; 3. Pump; 4. Check valve; 5. Protective component; 51. Outer cylinder; 511. Snap-fit ​​groove; 52. Sealing cylinder; 521. Snap-fit ​​block; 53. Connecting pipe. Detailed Implementation

[0018] Please refer to Figures 1 to 4 ;

[0019] This embodiment provides a battery cell liquid injection anti-corrosion device, including a protective component 5. The protective component 5 includes an outer cylinder 51 fixed around the injection needle, and a sealing cylinder 52 coaxial with the injection needle is detachably installed at the bottom end of the outer cylinder 51.

[0020] In practice, when the injection needle injects electrolyte into the injection hole of the battery cell, the injection needle is inserted into the injection hole, and the sealing cylinder 52 moves downward and abuts against the outside of the injection hole to form a sealed protective structure. This prevents the electrolyte evaporating from the injection hole from evaporating onto the frame of the battery cell injection device, thus avoiding corrosion of the frame.

[0021] Furthermore, the bottom end of the outer cylinder 51 is provided with a T-shaped snap-fit ​​groove 511, and the top end of the sealing cylinder 52 is provided with a snap-fit ​​block 521 that snaps into the snap-fit ​​groove 511.

[0022] In practical implementation, the sealing cylinder 52 can be disassembled by setting the snap-fit ​​groove 511 and snap-fit ​​block 521.

[0023] Furthermore, it also includes a low-pressure tank 2 fixed on the liquid injection device frame. One end of the low-pressure tank 2 is fixedly connected to a recovery pipe 21. The outer walls of several outer cylinders 51 are all fixedly connected to connecting pipes 53. Several connecting pipes 53 are connected to the recovery pipe 21. The recovery pipe 21 is equipped with a one-way valve 4.

[0024] In practice, when air containing volatile electrolyte substances enters the recovery pipe 21 from the inside of the outer cylinder 51 through the connecting pipe 53, the air containing volatile electrolyte substances will naturally flow into the low-pressure tank 2 because the inside of the low-pressure tank 2 is under negative pressure, and the one-way valve 4 prevents backflow.

[0025] Furthermore, the other end of the low-pressure tank 2 is connected to a detachable recovery tank 1 via a conduit, and the conduit is equipped with a one-way valve 4 and a pump 3.

[0026] In practice, the recycling tank 1 is designed to collect the air containing electrolyte volatiles collected by the low-pressure tank 2.

[0027] Furthermore, the sealing cylinder 52 is made of an elastic, corrosion-resistant sealing material.

[0028] In practice, the elastic corrosion-resistant sealing material is mainly composed of fluororubber, and then the outer surface is covered with PTFE.

[0029] Furthermore, the recovery tank 1 is connected to the end of the conduit via a flange connection mechanism.

[0030] In practice, the recycling tank 1 is designed to be easy to install and disassemble.

[0031] Furthermore, a pressure sensor is installed inside the low-pressure tank 2.

[0032] In practice, the air pressure inside the low-pressure tank 2 is monitored by a pressure sensor.

Claims

1. A battery cell electrolyte injection corrosion prevention device, comprising a protective component (5), characterized in that: The protective component (5) includes an outer cylinder (51) fixed to the periphery of the injection needle, and a sealing cylinder (52) coaxial with the injection needle is detachably installed at the bottom end of the outer cylinder (51).

2. The battery cell electrolyte injection and corrosion prevention device according to claim 1, characterized in that: The bottom end of the outer cylinder (51) is provided with a T-shaped snap-fit ​​groove (511), and the top end of the sealing cylinder (52) is provided with a snap-fit ​​block (521) that snaps into the snap-fit ​​groove (511).

3. The battery cell electrolyte injection and corrosion prevention device according to claim 2, characterized in that: It also includes a low-pressure tank (2) fixed on the injection device frame. One end of the low-pressure tank (2) is fixedly connected to a recovery pipe (21). The outer walls of several outer cylinders (51) are fixedly connected to connecting pipes (53). Several connecting pipes (53) are connected to the recovery pipe (21). A one-way valve (4) is provided on the recovery pipe (21).

4. The battery cell electrolyte injection and corrosion prevention device according to claim 3, characterized in that: The other end of the low-pressure tank (2) is provided with a removable recovery tank (1) via a conduit, and the conduit is provided with a one-way valve (4) and a pump (3).

5. The battery cell electrolyte injection and corrosion prevention device according to claim 4, characterized in that: The sealing cylinder (52) is made of elastic corrosion-resistant sealing material.

6. The battery cell electrolyte injection and corrosion prevention device according to claim 5, characterized in that: The recovery tank (1) is connected to the end of the conduit via a flange connection mechanism.

7. The battery cell electrolyte injection and corrosion prevention device according to claim 6, characterized in that: The low-pressure tank (2) is equipped with a pressure sensor.

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