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Filtration Solutions for Lithium Battery Separators
Lithium battery separators play a crucial role in batteries to prevent short circuits, ensuring the safe operation of batteries. Li-ion batteries have the highest demand in the world due to their high charging capacity, and extended battery life requirements. The separators are thin porous polymeric membranes that separate the positive and negative electrodes, allowing the flow of lithium ions while charging the batteries. For the separators to function optimally, it is important that the polymeric materials they are made of are filtered prior to their formation. These high-performance filtration solutions are used widely across many different fabrication processes to achieve the separators required technical specifications, cleanliness quality, and uniformity required for EV battery cell separators.
Pall Corporation provides advanced filtration technologies that support the production of these essential components, helping manufacturers meet the growing demand for reliable, high-capacity energy storage systems.
Supporting the Battery Separator Manufacturing Process
The battery separator manufacturing process requires exceptional material purity and consistency. Pall’s proven polymer melt filter technology ensures chemical companies supply high-quality polymeric separators to EV battery cell manufacturers. Purification steps include filtration of the molten polymer prior to film formation and filtration of various other additives and coatings used in the process. A process schematic for the separator film production process identifying the purification steps, is shown below.
Filtration locations in the separator polymer film plant
| Fabrication Stage | Products |
|---|---|
| 1 | Process water |
| Paraffin liquid | |
| Plasticizer | |
| 2 | Polymers |
| 3 | Protection liquid |
Trusted by Industry Leaders
Pall’s filtration systems are trusted by leading manufacturers across the battery and chemical industries. Our solutions help improve product quality, reduce downtime, and support the scale-up of lithium battery separator production to meet global energy demands.
Whether you're developing new materials or optimizing existing production lines, Pall’s expertise in lithium-ion battery separator manufacturing can help you achieve consistent, high-quality results.
Learn more about the solution that can support your applications or contact an expert today.