Lithium battery electrolyte extraction device

Abstract

The utility model provides a kind of lithium battery electrolyte extraction equipment, belong to lithium battery production technical field, including fixed plate, the fixed plate is vertically fixed on workbench, a plurality of fixed blocks are provided on the fixed plate, for inverting the electric core on fixed plate;The fixed plate is also provided with extraction device and blowing device, extraction device and blowing device are respectively set up corresponding with two injection holes on the electric core.The utility model can quickly extract electrolyte, and need not extrude battery aluminum shell, avoid the appearance of electric core bad.

Description

Technical Field

[0001] This utility model belongs to the field of lithium battery production technology, and in particular relates to a lithium battery electrolyte extraction device. Background Technology

[0002] Lithium-ion battery electrolyte filling involves two processes: first, the fluid transport process of electrolyte flowing from the outside of the battery into its interior; and second, the wetting process of electrolyte entering the electrodes, separator, interparticle gaps, and internal pores of the particles. The degree of electrolyte wetting of the electrodes significantly affects electrical performance. Only batteries that are fully wetted can undergo formation. Insufficient electrode wetting can easily lead to incomplete or uneven formation in certain areas, and may even cause gas expansion after sealing.

[0003] The basic process of electrolyte injection involves connecting the battery injection port to a vacuum system, drawing a vacuum to create a negative pressure inside the battery casing, and then allowing the electrolyte to enter the battery through the injection tube under the negative pressure. At the same time, positive pressure is applied to ensure that the electrolyte is fully immersed.

[0004] Overfilling of batteries often occurs during electrolyte filling, which reduces the battery's energy density and increases costs. Therefore, it is necessary to extract the excess electrolyte. Currently, the electrolyte is usually extracted through the filling hole. However, due to the small size of the filling hole, it is difficult to extract the electrolyte. During the extraction process, the aluminum casing of the battery needs to be squeezed to ensure the smooth discharge of the electrolyte. However, squeezing will deform the aluminum casing of the battery and affect the appearance of the cell. Utility Model Content

[0005] In view of the defects or deficiencies in the existing technology, this utility model provides a lithium battery electrolyte extraction device that can quickly extract electrolyte without squeezing the battery aluminum shell, thus avoiding poor cell appearance.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An embodiment of this utility model provides a lithium battery electrolyte extraction device, including a fixing plate, which is vertically fixed on a workbench. The fixing plate is provided with multiple fixing blocks for inverting the battery cell on the fixing plate.

[0008] The fixing plate is also equipped with an extraction device and an air blowing device, which are respectively set to correspond to the two liquid injection holes on the battery cell.

[0009] Furthermore, multiple fixing blocks are provided, all of which are L-shaped, and the multiple fixing blocks fix the four corners of the battery cell.

[0010] Furthermore, the extraction device includes a first linear motor and a liquid collection tank, with the liquid collection tank fixed to the output end of the first linear motor.

[0011] Furthermore, the liquid collection tank is provided with a liquid suction nozzle, which is configured to correspond to the liquid injection hole on the battery cell.

[0012] Furthermore, the liquid accumulation chamber is connected to a vacuum pump, which evacuates the liquid accumulation chamber.

[0013] Furthermore, a first pressure sensor is installed inside the liquid accumulation chamber to detect the pressure value inside the liquid accumulation chamber.

[0014] Furthermore, the air blowing device includes an air pump and a second linear motor, with the air pump fixed to the output end of the second linear motor.

[0015] Furthermore, the air pump is equipped with an air nozzle, which is correspondingly positioned to correspond to another liquid injection hole on the battery cell.

[0016] Furthermore, the air pump is equipped with an airflow valve, which controls the amount of gas discharged from the air pump.

[0017] Furthermore, a second air pressure sensor is also installed inside the air pump to detect the air pressure value inside the air pump.

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

[0019] 1. This utility model sets up an extraction device and an air blowing device, with the extraction device and the air blowing device respectively corresponding to the two liquid injection holes on the battery cell. Nitrogen gas is blown into the battery cell through the air blowing device, and the excess electrolyte in the battery cell is extracted by the negative pressure generated by the extraction device. This eliminates the need to squeeze the aluminum shell of the battery and avoids poor appearance of the battery cell.

[0020] 2. This utility model uses air pressure sensors installed in the liquid collection tank and the air pump to detect the air pressure in the liquid collection tank and the air pump. By controlling the operating power of the vacuum pump and the air pump, the air pressure values ​​of the liquid collection tank and the air pump are controlled, thereby controlling the drainage speed. At the same time, an airflow valve is installed in the air pump to control the exhaust volume of the air pump, thereby controlling the drainage volume. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the electrolyte extraction device in an embodiment of this utility model;

[0022] Figure 2 This is an exploded view of the electrolyte extraction device in an embodiment of this utility model;

[0023] The components include: 1. First linear motor; 2. First air pressure sensor; 3. Liquid collection tank; 4. Suction nozzle; 5. Fixing block; 6. Battery cell; 7. Air blowing nozzle; 8. Air flow valve; 9. Air pump; 10. Second air pressure sensor; 11. Second linear motor; 12. Fixing plate. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] A typical embodiment of this utility model is as follows: Figure 1 and Figure 2 As shown, a lithium battery electrolyte extraction device includes a fixing plate 12, which is vertically fixed to a worktable. Multiple fixing blocks 5 are provided on the fixing plate 12 for fixing the battery cell 6, ensuring that the battery cell 6 is inverted, i.e., the electrolyte injection hole of the battery cell 6 faces downwards. In this embodiment, four fixing blocks 5 are provided, symmetrically arranged, and all four fixing blocks 5 are L-shaped, capable of fixing the four corners of the battery cell 6, thereby fixing the battery cell 6 to the fixing plate 12.

[0026] The fixed plate 12 is also equipped with an extraction device and an air blowing device. The extraction device and the air blowing device are respectively set to correspond to the two liquid injection holes on the battery cell 6. The extraction device includes a first linear motor 1 and a liquid collection tank 3. The liquid collection tank 3 is fixed on the output end of the first linear motor 1. The first linear motor 1 is used to push the liquid collection tank 3 to move, so that the liquid collection tank 3 is close to the battery cell 6. The liquid collection tank 3 is equipped with a suction nozzle 4, which is set to correspond to one of the liquid injection holes on the battery cell 6. The first linear motor 1 pushes the liquid collection tank 3 close to the battery cell 6, so that the suction nozzle 4 is inserted into the liquid injection hole.

[0027] The liquid collection tank 3 is connected to a vacuum pump. The vacuum pump evacuates the liquid collection tank 3, creating a negative pressure inside the liquid collection tank 3, which facilitates the extraction of electrolyte from the battery cell 6.

[0028] A first pressure sensor 2 is installed inside the liquid collection chamber 3, which can detect the pressure value inside the liquid collection chamber 3. The pressure value inside the liquid collection chamber 3 is controlled by adjusting the operating power of the vacuum pump, thereby controlling the electrolyte extraction speed.

[0029] The air blowing device includes an air pump 9 and a second linear motor 11. The air pump 9 is fixed on the output end of the second linear motor 11. The second linear motor 11 pushes the air pump 9 closer to the battery cell 6. The air pump 9 is equipped with an air blowing nozzle 7, which is corresponding to another liquid injection hole on the battery cell 6. The second linear motor 11 pushes the air pump 9 closer to the battery cell 6, so that the air blowing nozzle 7 is inserted into the liquid injection hole, and the air pump 9 blows nitrogen into the battery cell 6, so that the nitrogen occupies the space inside the shell, thereby facilitating the discharge of electrolyte.

[0030] An air pump 9 is equipped with an air flow valve 8. The air flow valve 8 controls the amount of gas discharged from the air pump 9, thereby controlling the volume of gas delivered into the battery cell 6, and thus controlling the amount of liquid discharged.

[0031] The air pump 9 is also equipped with a second air pressure sensor 10, which is used to detect the output air pressure value of the air pump 9. The output air pressure of the air pump 9 is controlled by adjusting the operating power of the air pump 9, thereby controlling the liquid discharge speed.

[0032] The first pressure sensor 2 and the second pressure sensor 10 are both connected to the controller. The controller is also electrically connected to the vacuum pump and the air pump 9. The controller controls the operation of the vacuum pump and the air pump 9 based on the pressure data detected by the first pressure sensor 2 and the second pressure sensor 10, thereby achieving accurate and rapid extraction of electrolyte.

[0033] The controller controls the vacuum pump and air pump to adjust the air pressure value based on the detection data of the air pressure sensor. This is existing technology and will not be described in detail here.

[0034] Working principle

[0035] In use, first fix the battery cell to the fixing plate with the fixing block, so that the liquid injection hole of the battery cell faces downward. Start the first linear motor and the second linear motor to push the liquid collection tank and the air pump to move to one side of the battery cell until the suction nozzle and the blowing nozzle are inserted into the two liquid injection holes on the battery cell respectively. The drilling vacuum pump and the air pump inject nitrogen into the battery cell while drawing a vacuum in the liquid collection tank, so that the electrolyte enters the liquid collection tank from the suction nozzle, thereby realizing the extraction of electrolyte.

[0036] The volume of nitrogen injected into the battery cell by the air pump is controlled by the air flow valve, thereby controlling the amount of liquid discharged.

[0037] The pressure of the liquid accumulation tank and the air pump are detected by the first and second air pressure sensors, and the vacuum pump and the air pump are controlled to control the discharge speed of the electrolyte.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lithium battery electrolyte extraction apparatus, characterized by, Includes a fixing plate, which is vertically fixed to the workbench, and the fixing plate is provided with multiple fixing blocks for inverting the battery cell on the fixing plate; The fixing plate is also equipped with an extraction device and an air blowing device, which are respectively set to correspond to the two liquid injection holes on the battery cell.

2. The lithium battery electrolyte extraction apparatus of claim 1, wherein, Multiple fixing blocks are provided, and each fixing block is L-shaped, which fixes the four corners of the battery cell.

3. The lithium battery electrolyte extraction apparatus of claim 1, wherein, The extraction device includes a first linear motor and a liquid collection tank, with the liquid collection tank fixed to the output end of the first linear motor.

4. The lithium battery electrolyte extraction apparatus of claim 3, wherein, The liquid collection tank is equipped with a liquid suction nozzle, which is corresponding to one of the liquid injection holes on the battery cell.

5. The lithium battery electrolyte extraction device as described in claim 3, characterized in that, The liquid collection tank is connected to a vacuum pump, which evacuates the liquid collection tank.

6. The lithium battery electrolyte extraction device as described in claim 3, characterized in that, The liquid accumulation chamber is equipped with a first air pressure sensor to detect the air pressure value inside the liquid accumulation chamber.

7. The lithium battery electrolyte extraction device as described in claim 1, characterized in that, The air blowing device includes an air pump and a second linear motor, with the air pump fixed to the output end of the second linear motor.

8. The lithium battery electrolyte extraction device as described in claim 7, characterized in that, The air pump is equipped with an air blowing nozzle, which is corresponding to another liquid injection hole on the battery cell.

9. The lithium battery electrolyte extraction device as described in claim 7, characterized in that, The air pump is equipped with an airflow valve, which controls the amount of gas discharged from the air pump.

10. The lithium battery electrolyte extraction device as described in claim 7, characterized in that, The air pump is also equipped with a second air pressure sensor to detect the air pressure value inside the air pump.

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