Large Aluminum Shell LiFePO4 Prismatic Cell Insulation Paper Die Cut Pad 0.1-0.25mm

An insulation paper cell pad die cut for large aluminum-shell prismatic LiFePO4 power cells. The part is applied as a face pad on the top and bottom face of the cell, and between stacked cells inside the module. Large format LiFePO4 cells of the 100Ah, 280Ah and 302Ah class have a wide flat aluminum face, so the pad has to stay flat over a long span, resist LiFePO4 electrolyte vapor, and hold its dielectric strength through thousands of cycles. The pad is punched from high purity insulation paper film with a matte surface, with terminal holes, vent relief and corner notches cut to the cell top plate drawing, so it aligns without manual trimming on the assembly line.

• Built for large aluminum shell cells — pad size from 50mm to 300mm wide face, matched to 100Ah / 280Ah / 302Ah prismatic LiFePO4 cells.
• Insulation paper high purity film — low ionic contamination, does not whiten, swell or lose resistance in LiFePO4 electrolyte vapor.
• Flat, low warpage on wide pads — controlled flatness and anti curl treatment, so corners do not lift on the aluminum shell.
• Terminal and vent relief cutting — terminal holes, vent window and corner notch cut to +/-0.1mm against the cell top plate drawing.
• Thermal endurance — continuous -40°C to 140°C, matching ESS cabinet and vehicle pack thermal profile.
• Matte anti-scratch surface — protects the blue or black aluminum shell coating and prevents sticking during stacking.

The base material is a biaxially stretched PET polyester film produced from dimethyl terephthalate and ethylene glycol by ester exchange and vacuum polycondensation. The following typical property values apply to both the flame retardant series and the standard series.

Reference standards: ISO 1183, ASTM D1003, ASTM D570, ISO 527, ISO 178, ISO 306, ISO 11359, IEC 60250, IEC 60243, IEC 60093, UL 94 / UL Bulletin 94. The above figures are typical values obtained under standard test methods and are not a guarantee of performance under unstable application conditions. Test reports for each batch are available on request.

• Prismatic LiFePO4 cell top face pad and bottom pad
• Utility scale and commercial energy storage racks and cabinets
• Electric vehicle and electric bus power battery packs
• Telecom backup and household energy storage systems
• Cell-to-cell stacking insulation inside module frames
• Busbar and sampling harness isolation on large format cells

• Large format die cutting capability — presses set up for wide pads, with flatness and corner lift controlled, not just small punched parts.
• Cell drawing to finished pad — send the cell datasheet or a sample shell and we return a pad drawing for approval before production.
• Repeat order consistency — same resin source and same die across orders, so your stacking fixture keeps working without adjustment.
• Free samples in 3-5 working days — 0.25mm standard pad for a fit and insulation test on your own cells.
• Export service — FOB / CIF / EXW, T/T, L/C and Western Union, flat packed to keep the pads perfectly flat.