Application of Compressed Air in Lithium Battery Industry

Compressed air plays a key role in the whole process of the lithium battery industry. Its application runs through the core links such as electrode manufacturing, battery core assembly, liquid injection packaging and component capacity, and has strict requirements on gas purity, dryness and stability. The following is a description of application scenarios, quality specifications and technical solutions:

core Application Scenarios of 1. Compressed Air in Lithium Battery Industry

1. Electrode manufacturing

• slurry delivery and coating compressed air is used to drive the slurry delivery system, and the coating thickness and uniformity are controlled by precision pneumatic valves to ensure the consistent distribution of electrode active materials.
• Pole piece drying: High-pressure gas accelerates the volatilization of solvent on the surface of the pole piece, shortens the drying time and improves the production efficiency.

2. Cell assembly

• winding/Lamination Positioning: Stable air pressure drives the mechanical arm to complete the precise lamination or winding of the diaphragm and positive and negative electrode sheets to avoid positioning deviation caused by air pressure fluctuation.
• Soldering and Encapsulation pneumatic tools to complete lug welding, shell packaging and other operations, the gas is required to be oil-free and dust-free to prevent welding defects or seal failure.

3. Liquid injection and component capacity link

• electrolyte injection dry and clean compressed air is used for environmental control before and after liquid injection to avoid moisture or impurities mixed into the electrolyte.
• Control of component capacity environment by adjusting the temperature and humidity of the compressed air, the environmental conditions in the process of battery charging and discharging are simulated to ensure the accuracy of the test data.

2. lithium battery industry quality specification for compressed air

1. Gas purity requirements

• oil-free and dust-free: oil content should be ≤ 0.001 mg/m & sup3;(ISO 8573-1 Class 0), particle size should be controlled below 0.1μm, to avoid oil or dust caused by battery short circuit, self-discharge and other problems.
• No water requirement: The dew point of the gas should be ≤-40 ℃ to prevent moisture from reacting with the electrolyte and affecting the cycle life of the battery.

2. Pressure and flow stability

• pressure fluctuation control: The air pressure shall be stable within the range of ± 0.02MPa to avoid pole piece fracture or package failure due to sudden change of air pressure.
• Flow Matching: Dynamically adjust the air supply according to the production rhythm to ensure the continuity of liquid injection and drying.

Technical Solution for 3. Grantklin Water Lubricated Single Screw Compressor

1. Oil-free design guarantees core quality
using single screw and star wheel precision meshing technology, pure water instead of traditional lubricating oil, from the source to eliminate the risk of oil pollution. The oil content of the output gas is stable below the detection limit (≤ 0.001 mg/m & sup3;), which fully meets the strict requirements of the lithium battery industry for oil-free air.

2. Deep drying and precision filtration

• adsorption drying device: Cooperate with molecular sieve adsorbent to reduce the gas dew point to below -60°C, effectively avoiding the impact of moisture on battery performance.
• multistage filtration system: Equipped with high-efficiency oil-water separator and HEPA filter element to capture particles above 0.01μm to ensure gas cleanliness standard.

3. Intelligent regulation and system reliability

• frequency conversion control technology according to the actual gas consumption, the output pressure and flow of the compressor are automatically adjusted to avoid energy waste.
• Online monitoring function: Real-time feedback of gas oil content, dew point, pressure and other parameters, abnormal situation automatic alarm and start standby equipment.
• Redundant design and low maintenance costs: The pipe material is 316L stainless steel and electrolytic polishing is performed. The key nodes are equipped with double compressors to operate in parallel to ensure continuous gas supply. Water lubrication medium does not need complicated oil circuit system, which greatly reduces the replacement frequency of filter elements and the cost of consumables.

Conclusion

the application of compressed air in the lithium battery industry runs through the whole production process, and its quality directly affects the performance and safety of the battery. Granklin water-lubricated single screw compressor provides continuous and stable high-quality compressed air solutions for the lithium battery industry through oil-free design, deep drying technology and intelligent control system, helping enterprises to improve product qualification rate and reduce operating costs, which is an ideal choice for upgrading the new energy industry.