1.What dehumidification methods are generally used in lithium battery cleanrooms?
Lithium battery production workshops have strict humidity control requirements and generally low relative humidity. Different dehumidification methods can be selected based on specific humidity requirements:
● Auxiliary rooms with RH > 50%: Can use chilled water for ordinary refrigeration dehumidification.
● Workshops with RH between 10-30% (dew point above -15°C): Can use a chilled water + single-stage rotor dehumidification system.
● Cell baking, electrolyte filling areas requiring dew point ≤ -45°C: Can use a two-stage rotor deep dehumidification system (first-stage rotor pre-treats fresh air to dew point ≤ -15°C, second-stage rotor performs deep dehumidification to dew point ≤ -45°C).
Combining different dehumidification methods can meet corresponding process requirements.
2.How to achieve cleanroom dew point control of -40°C / -60°C or even lower?
Achieving an environmental dew point temperature of -40°C / -60°C or lower is difficult with ordinary air conditioning refrigeration and dehumidification. It requires a system combining chilled water + a two-stage desiccant rotor dehumidification system (chilled water pre-treats air for cooling and dehumidification, then air enters the rotor system. The first-stage rotor pre-treats fresh air to a dew point ≤ -15°C, reducing the load on the second-stage rotor. The second-stage rotor performs deep dehumidification to a dew point ≤ -40°C / -60°C). Enclosing the equipment locally can better ensure dew point control meets process needs.
3. What dehumidification methods are generally used in lithium battery cleanrooms?
Lithium battery production workshops have strict humidity control requirements and generally low relative humidity. Different dehumidification methods can be selected based on specific humidity requirements:
● Auxiliary rooms with RH > 50%: Can use chilled water for ordinary refrigeration dehumidification.
● Workshops with RH between 10-30% (dew point above -15°C): Can use a chilled water + single-stage rotor dehumidification system.
● Cell baking, electrolyte filling areas requiring dew point ≤ -45°C: Can use a two-stage rotor deep dehumidification system (first-stage rotor pre-treats fresh air to dew point ≤ -15°C, second-stage rotor performs deep dehumidification to dew point ≤ -45°C).
Combining different dehumidification methods can meet corresponding process requirements.
5.What are the advantages of modular low-humidity cleanrooms compared to traditional built-in-place cleanrooms?
Compared to traditional built-in-place cleanrooms, modular low-humidity cleanrooms offer the following advantages:
● Rapid Installation: Utilizes prefabricated modules for simple and quick installation, significantly shortening the project timeline and saving time costs.
● Flexible Layout: Modular design allows for personalized customization based on your needs, offering more flexible and adaptable spatial layouts to meet evolving work requirements.
● Minimal On-site Environmental Impact: Involves only assembly on-site, with no material cutting/processing, reducing pollution and noise, helping maintain a clean operating environment indoors.
● Energy Efficient and Eco-friendly: Employs advanced energy-saving technologies to effectively reduce energy consumption, while focusing on the selection of environmentally friendly materials, making the cleanroom both aesthetically pleasing and green.
● Easy Maintenance: The structural design simplifies daily cleaning and maintenance, providing convenience for daily operations.
● High Cost-Effectiveness: Lower cost and shorter installation cycle compared to traditional cleanrooms, offering high value.
● Good Mobility and Scalability: The design considers mobility and adjustability, allowing for quick reconfiguration or area expansion according to process needs, or disassembly and relocation, improving production efficiency and flexibility.
6.How can humidity be maintained stably over the long term in a lithium battery cleanroom?
To maintain stable humidity long-term in a lithium battery cleanroom, the core equipment is the desiccant rotor dehumidifier unit. Regular maintenance, inspection, and servicing of the rotor dehumidifier are essential to ensure stable and normal operation. The temperature and humidity sensors installed in the workshop need regular testing and calibration to ensure accurate data collection. Additionally, good environmental management of the workshop is crucial: personnel and materials should enter/exit through appropriate airlocks/buffers, maintaining the workshop's airtightness and pressure differentials to minimize the infiltration of external moist air. Through these measures, the lithium battery cleanroom's humidity can be maintained within the design range long-term, ensuring stable product quality.
7.How long is the engineering cycle for a modular ultra-low dew point lithium battery cleanroom? Can it be installed quickly?
The design and installation process for a modular ultra-low dew point cleanroom mainly includes the following steps:
1.Preliminary Preparation & Design Calculation: Confirm the layout based on client production process requirements. Perform overall design calculations and equipment selection based on parameters like cleanliness, temperature, humidity, and pressure, then produce design drawings.
2.Factory Production: Manufacture and process various prefabricated components according to the design drawings.
3.Testing & Transportation: After production, assemble the modular cleanroom in the factory and conduct parameter testing. After passing tests, disassemble, pack, and transport to the installation site.
4.On-site Assembly: Assemble the modular cleanroom on-site.
5.Commissioning & Acceptance: After assembly, debug and conduct operational tests on the modular cleanroom, ensuring ventilation systems, filters, air conditioning, and other equipment operate normally and meet requirements. Then proceed with testing, acceptance, and handover for use.
The on-site installation time for a modular cleanroom varies slightly with the size of the clean booth. Typically, small modular cleanrooms require only 3-5 days for on-site assembly, while larger area modular cleanrooms require about 7-10 days. Rapid installation is achievable with minimal on-site environmental impact.
8.What are the material selection requirements for modular low-humidity lithium battery cleanrooms?
Material selection for modular low-humidity lithium battery cleanrooms needs to meet core requirements such as low particulate generation/shedding, moisture resistance, thermal insulation, corrosion resistance, and ease of cleaning, while also considering the convenience of modular installation.
● Materials for partitions and ceilings must first meet purification requirements of being low-shedding, dust-resistant, and easy to clean (e.g., using sandwich panels, stainless steel plates).
● Simultaneously, materials for partitions/ceilings/floors need excellent moisture resistance and anti-corrosion properties to prevent moisture ingress affecting battery performance. Corrosion resistance prevents chemical substances like electrolyte from corroding the enclosure materials.
● Doors and windows for modular low-humidity lithium battery cleanrooms are recommended to use double-glazed observation windows paired with airtight doors (good airtightness).
● While meeting the above performance requirements, the material dimensions and interface design should facilitate quick installation and disassembly.
