What should we focus on when choosing FFU for a lithium battery clean workshop?

Direct answer: When choosing FFU for a lithium battery clean workshop, you should focus on the cleanliness goals of the process area, actual dust generation conditions, target air volume and static pressure, filter resistance, airflow organization, installation conditions and zoning control requirements. For areas with dry environments, it is also necessary to confirm how the FFU air supply and dehumidification systems work together. Final specifications and quantities shall be determined through design calculations, prototype validation and on-site testing.

Starting from the process area, determine the tasks undertaken by FFU

In the same lithium battery workshop, equipment layout, personnel activities, material flow and particle control requirements may be different in different process areas. Before selecting a model, you should first indicate the area served by the FFU, the cleanliness requirements and the locations that require key protection, and then decide whether to use overall air supply or partial enhanced air supply.

The cleanliness level describes the control target of suspended particles in the air and cannot alone predict the number of FFU. The actual configuration also needs to take into account the dust source, return and return air paths, and the obstruction of the air flow by the equipment. The ISO 14644-1 standard describes the particle concentration classification method for clean room air cleanliness; projects still need to complete airflow design and verification based on on-site working conditions.

The air volume, static pressure and filter should be matched according to the same working conditions.

The nominal maximum air volume of FFU cannot be directly used as the design air volume after installation. Filters, air inlet conditions and site structure will all affect the actual operating point. During technical communication, it is advisable to clarify the static pressure that can be provided at the target air volume after installing the specified filter, and at the same time check the wind speed and uniformity of the outlet surface.

Filters should be selected based on particle control objectives, rated air volume, resistance, sealing method and replacement conditions. When comparing different solutions, you should check the filter resistance under the same air volume and check whether the fan can maintain the target air supply. The specific configuration can be combined with Aili Industrial’sFFU products andHEPA/ULPA air filters should be technically matched and should not be determined solely by filtration level or appearance size.

Dust control and dry environment need to be checked separately

When there is a lot of process dust in the workshop, it is necessary to first confirm the location of the dust and the corresponding collection and cleaning measures. FFU is responsible for providing filtered clean air supply and cannot replace the source control of clear dust generation points; the dust accumulation of the filter should also be included in the later maintenance plan. NIOSH engineering control information lists local exhaust as a method of capturing pollutants at the source.

For process areas with dry environments, particle control and humidity control should also be checked separately. FFU selection focuses on clean air supply and airflow organization; the required dew point or humidity conditions should be determined together with the project's dehumidification, air conditioning and room sealing plans. Application materials for dry environments in battery manufacturing also include dehumidification as an independent environmental control content. Therefore, it is not appropriate to directly regard increasing the number of FFU as a solution to improve humidity conditions.

Series projects also need to consider control, installation and maintenance

When multiple FFUs are arranged according to process areas, the partition, power supply, communication interface, equipment address, speed adjustment range and subsequent expansion requirements should be determined during the selection stage. If the project requires centralized management, it can be combined withThe FFU group control system checks the control plan. At the same time, the ceiling load, box height, air inlet space, electrical connections and filter maintenance paths should be confirmed one by one on the drawings.

The advantage of Aili Industrial's project supporting equipment is that motors, fans, control systems, sheet metal structures and filters are all developed and manufactured by itself. Faced with the size, air volume, static pressure and control requirements of different process areas, key components and the entire machine structure can be placed under the same working condition for coordinated design, which also facilitates the verification of installation, operation and maintenance conditions during the prototype stage. For non-standard or batch FFU projects, the specific configuration and performance requirements should still be written into the technical agreement, and shall be subject to the test results and on-site verification under the agreed working conditions.

Before making an inquiry, it is recommended to prepare these information

Providing the process area floor plan, cleanliness targets, equipment and personnel layout, dust generation points, target air supply parameters, ceiling dimensions, power supply conditions, control partitions and estimated quantities will help to quickly form a verifiable FFU configuration plan. If there are on-site air volume, filter pressure difference or cleanliness test records, they should also be provided to facilitate the judgment of the matching relationship between the existing system and the new equipment.