Amidst the significant surge in the lithium-ion battery manufacturing industry, the stringent environmental demands within production have made dehumidification air conditioning an essential component in plant construction and the manufacturing process. As the lithium battery sector grows rapidly, the segment focusing on central air conditioning has witnessed remarkable development.
Why Dehumidification Air Conditioning Is Crucial for Lithium Batteries
Lithium battery production involves multifaceted processes, such as slurry formation, coating, pressing, winding, assembly, and multiple stages of treatment. Moisture, a critical factor, profoundly influences lithium-ion battery performance.
Impact of Moisture on Lithium Battery Performance
Moisture exerts a significant impact on various aspects of lithium-ion batteries. High moisture content can diminish discharge capacity, increase internal resistance, accelerate cycle degradation, and augment battery thickness. Controlling moisture levels rigorously throughout the battery production process is vital to ensure optimal battery performance.
Humidity Requirements in Lithium Battery Production
The lithium battery production plant necessitates distinct humidity control for various areas:
- Ordinary Humidity Requirements: Areas like negative coating rooms need humidity control ≤60%, achieved through cooling dehumidification.
- Low-Humidity Demand Rooms: Zones like positive roll, strip, die cutting, and split rooms mandate humidity control ≤20% or ≤45%. Cooling dehumidification proves insufficient here, requiring rotary dehumidifiers.
- Low Dew Point Humidity Rooms: Specific spaces like drying, formation, and liquid injection rooms require humidity control with dew points ≤-50°C, often demanding two-stage wheel dehumidification.
Dehumidification Methods in Lithium Battery Production
Numerous air dehumidification methods exist, including cooling dehumidification, liquid and solid adsorbent dehumidification, and membrane-based systems. A combination of these technologies often ensures superior efficiency while conserving energy. Presently, cooling and rotary dehumidification are the primary methods used in the lithium battery industry.
Energy-Saving Analysis of Low-Humidity Air Conditioning Systems
Rotary dehumidification systems, while effective, pose challenges such as complex structure, high operational costs, and substantial air temperature rise during dehumidification. Harnessing waste heat generated by the production process can mitigate the energy consumption of rotary dehumidification units, particularly in critical process links like the coating and formation stages.
Integrating waste heat from these processes to reduce regeneration heating power in the dehumidification system stands as a promising strategy for optimizing energy consumption in lithium battery production facilities.
In summary, the strategic implementation of dehumidification air conditioning systems, alongside leveraging waste heat, proves pivotal in ensuring the efficient and effective production of lithium-ion batteries while minimizing energy consumption and operational costs.