Battery vacuum liquid injection machine

The vacuum liquid injection machine has a double-station structure for soft-pack and cylindrical batteries. The soft-pack station can be used for vacuum liquid injection, vacuum standing and vacuum pre-sealing processes of soft-pack batteries; the cylindrical station can be used for vacuum liquid injection, vacuum standing and pressurized infiltration processes of cylindrical batteries. The equipment is small in size and can be used in a glove box. It is an ideal choice for the production of soft-pack battery and cylindrical battery samples in laboratories and research institutes.

Features：

1. Vacuum injection under high vacuum conditions can achieve full electrolyte infiltration of the electrode and shorten the standing time;

2. Used for soft-pack batteries, button batteries, and cylindrical batteries

3. The soft-pack station has three functions: vacuum injection, vacuum standing, and vacuum pre-sealing;

4. The cylindrical station has both vacuum injection and pressurized infiltration functions;

5. The injection speed is adjustable to prevent electrolyte splashing during injection;

6. The high-precision injection pump is controlled by PLC to ensure injection accuracy;

7. The buffer tank liquid level alarm function prevents overflow due to excessive liquid in the tank;

8. Small size, simple operation, long service life, can also be used in the glove box.

Contact us :

If you are interested in our Battery vacuum filling machine, please contact us for more information and quotation.

Tel: 86 159 3625 3205

Email: zerlinda@zztainuo.com

Contact person: Zerlinda

WeChat: 86 159 3625 3205

Technical Specifications：

 Main accessories：

Application：

Lithium battery production

Pharmaceutical and biological

Laboratory chemical analysis

Semiconductor material manufacturing

Food and cosmetic manufacturing

Medical equipment

Application Cases《Application of vacuum liquid injection machine in cylindrical battery injection》

The application process of vacuum injection machine in cylindrical battery is an important process to ensure that the electrolyte inside the battery cell is injected evenly, fully and without bubbles. Especially in the production of lithium-ion batteries, the quality of injection directly affects the performance and life of the battery. The following is a detailed process of vacuum injection machine in cylindrical battery injection:

 1. Battery cell preparation

Cell assembly: The cell of a cylindrical battery is usually composed of a positive electrode, a negative electrode, a diaphragm and other components. Before injection, the cell has completed basic assembly, and the electrode material and the diaphragm are combined by winding or lamination.

Opening preparation: One end of the battery cell usually has a reserved injection port, through which the electrolyte is injected, and the cell needs to have an appropriate opening for sealing.

2. Vacuum injection machine preset

Set the vacuum degree: Set the required vacuum degree and time by controlling the vacuum injection machine. The vacuum degree is usually between 0.1-0.2 bar to remove air and moisture in the cell and provide the best conditions for electrolyte injection.

Setting the injection volume and injection speed: Set the injection volume of each battery cell according to the battery design requirements. The injection speed is precisely adjusted through the digital control system to ensure that each battery cell obtains the right electrolyte.

3. Establishing a vacuum environment

The battery cell is placed in the vacuum cavity: The assembled cylindrical battery cell is placed in the injection chamber of the vacuum injection machine to ensure an isolated environment during the injection process.

Vacuuming: Start the vacuum pump to extract the air in the injection chamber to form a low-pressure vacuum environment. Usually, the vacuum process needs to last for several minutes to ensure that the gas and moisture inside the battery cell are completely removed, thereby avoiding the generation of bubbles inside the battery and providing favorable conditions for electrolyte injection.

4. Injection process

Injection operation: Under a vacuum environment, the electrolyte enters the battery cell through the injection port. Due to the effect of the vacuum, the electrolyte can smoothly and quickly penetrate into every tiny space between the electrode and the diaphragm.

Injection control: The vacuum injection machine is equipped with a precision control system to ensure that the injection volume of each battery cell meets the set standard and avoids excessive or insufficient electrolyte injection.

5. Penetration and vacuum maintenance

Liquid penetration: The electrolyte penetrates between the electrodes and the diaphragm inside the battery. This process takes a certain amount of time to ensure that the electrolyte is evenly filled inside the battery to achieve the best infiltration effect.

Vacuum holding time: After the injection is completed, the vacuum environment is maintained for a period of time to allow the electrolyte to fully penetrate and remove all bubbles in the battery cell. This process usually lasts for several minutes.

6. Restoration to normal pressure

Slowly restore to normal pressure: After the injection and penetration process is completed, slowly restore the pressure in the injection chamber to normal pressure. Avoid sudden pressure rise that may cause damage to the battery cell.

Check the battery sealing: After restoring normal pressure, check the sealing of the battery cell to ensure that the battery cell does not leak.

7. Sealing and removal of the battery cell

Seal the injection port: Use a sealing device to seal the injection port of the battery to ensure that the electrolyte does not leak. This step can be done by capping, glue sealing or welding.

Removing the battery cell: After the injection and sealing are completed, remove the battery cell from the vacuum injection machine and prepare for the next step of the processing process.

8. Post-processing and quality inspection

Battery performance test: The battery cell that has been filled and sealed will enter the battery formation and capacity division process. At this time, the battery is subjected to preliminary charge and discharge tests to ensure that there are no bubbles inside the battery and the electrolyte is evenly distributed.

Quality control: By testing the internal resistance, voltage, capacity and other parameters of the battery, the performance of each battery is ensured to meet the design requirements. Some vacuum filling machines will record various parameters during the entire filling process for data traceability and quality management.

 Advantages of vacuum filling machines in cylindrical batteries

High-precision filling: The vacuum filling machine can accurately control the amount of liquid filled in each battery to avoid affecting the battery performance due to too much or too little electrolyte.

Removing bubbles: The vacuum environment can effectively remove the air and bubbles inside the battery cell to avoid the increase of internal resistance and battery capacity attenuation caused by bubbles.

Improving battery performance: By ensuring that the electrolyte is evenly penetrated and there is no air inside, the stability and service life of the battery are significantly improved.

Improving production efficiency: The vacuum filling machine usually has automatic control and batch production capabilities, which greatly improves the efficiency of battery production.

 Summary：

The application of vacuum injection machine in cylindrical battery production is mainly used to accurately and efficiently inject electrolyte through vacuum environment and ensure that the bubbles inside the battery are completely removed. This process not only improves the performance and consistency of the battery, but also effectively improves production efficiency. By precisely controlling the injection volume and injection speed, the vacuum injection machine provides important quality assurance for the production of lithium-ion batteries.