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Application of air compressor in the production of lithium battery and sodium battery

2026-04-15Views:

As the core power and process equipment, air compressor plays an irreplaceable role in the production of lithium batteries and sodium batteries. The following analysis is based on the three dimensions of application, technology value and industry trends:

1. core application links

lithium battery production

  1. pole piece manufacturing
    • coating and Drying: The air compressor drives the coater to evenly coat the electrode slurry, and quickly remove the solvent through the drying process.
    • Compaction and slitting: Provide high-pressure airflow to assist pole piece compaction to ensure the consistency of material density; use airflow to blow debris during slitting to prevent pollution.
  2. cell synthesis
    • winding and liquid injection: The tension of the pole piece is controlled during the winding process, and the electrolyte infiltration efficiency is improved by pressurizing with compressed air during liquid injection.
  3. component capacity
    • testing and Packaging: Provide a stable air source during the battery charge and discharge test, and purge the inside of the shell with clean air before packaging.
  4. Special process
    • airflow pulverization: Drive the airflow mill to crush the positive and negative materials to ensure uniform particle size (such as lithium iron phosphate D50 control).
    • nitrogen-making protection: Supply gas to the nitrogen making machine and produce high purity nitrogen for inert protection of sintering, liquid injection and other links.

Sodium battery production

  1. material Preparation
    • high temperature reaction: In the synthesis of sodium ion cathode materials (such as Na₂ MnFe(CN)), air compressors participate in the transportation and control of reaction gases.
  2. Battery assembly
    • electrode compaction: Provide uniform air pressure to ensure stable electrode porosity and improve ion transmission efficiency.
  3. Environmental Control
    • drying and Dust Removal: In the treatment of diaphragms and housings, compressed air is used to drive the drying and cleaning process.

2. technical value and requirements

  1. quality Assurance
    • oil-free design: Avoid oil pollution of electrode materials, affecting the battery self-discharge performance.
    • Low dew point control lithium batteries require compressed air dew point ≤-40 ℃, and sodium battery part of the process needs to be lower to -60 ℃ to prevent moisture from causing oxidation of metal sodium.
  2. Efficiency improvement
    • pressure stability: ± 0.5bar fluctuation range ensures uniform coating thickness and improves yield by 10%-15%.
    • energy saving technology: The combination of frequency conversion oil-free screw machine and centrifuge reduces energy consumption by 30%, which is suitable for large-scale production of lithium batteries.
  3. Security Enhancement
    • explosion-proof design in the process of sodium metal treatment, the air compressor shall comply with ATEX explosion-proof standard to prevent accidents caused by sparks.

3. Industry Trends and Innovation Direction

  1. equipment Upgrade
    • water-lubricated screw air compressor: Oil-free characteristics are suitable for lithium battery expansion needs.
    • intelligent monitoring: Integrated IoT sensor realizes real-time warning of pressure and dew point, reducing manual detection frequency by 50%.
  2. Process fusion
    • sodium battery field: Explore the collaborative design of air compressor and aerodynamics, optimize the battery heat dissipation structure, and improve the energy density.
  3. Green manufacturing
    • waste heat recovery: The waste heat of the air compressor is used for workshop heating or preheating of the liquid injection process to reduce carbon emissions by 15%-20%.

Summary

air compressor runs through the whole life cycle of battery production, and its performance directly affects battery safety, energy density and production cost. In the future, as lithium batteries move towards the TWh era and sodium battery technology matures, air compressors will develop in a more efficient, smarter and greener direction, becoming a key support for the upgrading of the battery industry.

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