2026-09-20
Prismatic power and energy storage lithium-ion batteries are wrapped with PET blue protective film in early production stages. The blue film serves as physical shielding and electrical insulation, preventing aluminum casing scratches, dust contamination and short-circuit risks during cell transportation and turnover. Before entering module assembly, the blue film and residual pressure-sensitive adhesive must be thoroughly removed.
Partial film residue, leftover glue and surface scratches will directly trigger insulation test failures, weaken structural bonding and cause long-term hidden safety risks in battery packs. Conventional stripping technologies suffer from low yield, heavy labour input, chemical pollution or casing damage. As a professional developer and manufacturer of ultra-high pressure pure water jet cleaning equipment, Fedjetting provides dedicated automated UHP blue film removal systems tailored for lithium battery factories, supporting mass production and cell rework procedures for power batteries, energy storage batteries and consumer lithium cells.
Blue PET film sticks tightly to aluminum cell shells via PSA adhesive. Incomplete stripping brings multiple severe production and safety challenges:
For new energy manufacturers pursuing stable yield and long-term pack reliability, controllable, high-consistency blue film stripping becomes an essential standardized process.
Advantages: Low initial investment, simple operation for small-batch rework. Disadvantages: Extremely labour-intensive; uneven tearing easily leaves adhesive residue; sharp tools scratch aluminum casings; high inconsistency between operators; low hourly throughput; high workshop humidity; difficult to adapt to fully automatic production lines.
Advantages: Capable of dissolving partial adhesive layers. Disadvantages: Hazardous organic solvents create volatile emissions; wastewater requires complicated treatment; solvent residues risk cell chemical contamination; improper soaking time corrodes aluminum shells; many regions enforce stricter VOC and discharge limits.
Advantages: Contact-free processing, easy automation integration. Disadvantages: Localized thermal stress risk; overexposure causes casing surface discoloration and micro-deformation; high equipment procurement cost; smoke extraction system required; limited efficiency for large-volume mass production.
Advantages: Continuous linear processing. Disadvantages: High failure rate for wrinkled, bubbled blue film; frequent film breakage with partial residue; mechanical contact easily creates surface indentations; heavy maintenance on roller consumables.
Advantages: Pure cold water process, no chemicals, no thermal damage; adjustable impact force to peel film while protecting aluminum substrate; high uniformity; easy integration with automated production lines; closed-loop wastewater filtration; continuous stable mass processing. Limitations: Requires standardized fixture positioning; needs professional parameter debugging according to film thickness and adhesive grade.
Overall, ultra-high pressure pure water jet technology achieves balanced performance on yield, casing protection, environmental compliance and continuous productivity, increasingly adopted by large-scale lithium battery manufacturing bases worldwide.
Fedjetting integrated blue film removal system consists of UHP power unit, multi-axis precision motion platform, rotating high-pressure nozzle assembly, closed water circulation filtration module and PLC intelligent control system. It supports offline rework stations and inline automated production layout.
Different from laser thermal processing and rigid mechanical contact, Fedjetting UHP water jet relies purely on fluid kinetic energy to separate film from substrates. Optimized pressure algorithm avoids micro-scratches on aluminum shells, stabilizing cell appearance qualification rate and eliminating thermal-induced battery performance degradation risks.
No solvent, abrasive or additive required. The whole process uses only deionized water. The matched closed recovery system avoids scattered plastic film waste, simplifies factory environmental audit procedures and complies with global new energy industry low-carbon manufacturing standards.
Consistent automated stripping lowers manual intervention. Compared with manual rework, Fedjetting equipment significantly shortens processing cycle and reduces rejection caused by incomplete film removal. Less downtime directly brings tangible cost benefits for gigafactories.
Fedjetting supplies two mature configurations: independent rework workstations for small-scale correction, and inline automation modules connectable with cell conveying, scanning and testing equipment. Engineers customize motion trajectories according to cell outlines.
All working parameters including pressure, moving speed and nozzle rotation speed can be stored as product recipes. Operation logs can be exported for production traceability, matching strict quality management requirements of automotive-grade power battery factories.
Fedjetting provides pre-sales process simulation, on-site commissioning, operator training, periodic inspection and global spare parts supply. Our engineering team accumulates abundant experience cooperating with new energy enterprises across Asia, Europe, Southeast Asia and the Middle East.
As new energy battery capacity expands and product safety standards tighten, traditional blue film stripping processes can hardly satisfy modern gigafactories’ requirements on yield, consistency and environmental protection. Fedjetting ultra-high pressure pure water jet blue film removal system delivers a balanced solution: thorough film & glue stripping, zero thermal damage to lithium cells, eco-friendly operation and flexible automated layout. For power battery and energy storage cell manufacturers aiming to upgrade pre-assembly processing workflows, Fedjetting UHP de-film technology is a forward-looking, high-reliability process choice.
If you need technical proposals, performance testing arrangement or customized quotation for battery blue film removal projects, contact Fedjetting new energy industry engineering team for professional consultation.
