Pouch Cell Secondary Vacuum Sealing Machine for Degassing and Final Heat Sealing

Product Overview

This secondary vacuum sealing system delivers precision vacuum extraction, mechanical puncture degassing, and final hermetic thermal bonding for pouch-format lithium-ion batteries and next-generation energy storage cells. Engineered specifically for post-electrolyte filling and formation processing, the equipment integrates piercing and vacuum heat-sealing operations into a single, high-efficiency workstation that prevents gas retention while securing critical seam integrity.

Designed for research institutions, pilot assembly facilities, and industrial battery pilot lines, the unit accommodates diverse pouch cell geometries and pouch foil laminates. Its dual-acting pneumatic clamping and guided vacuum chamber ensure complete atmospheric evacuation prior to sealing, supporting demanding development workflows across solid-state, lithium-metal, sodium-ion, and conventional pouch battery manufacturing.

Constructed with industrial-grade corrosion-resistant materials and ultra-precise thermal regulation, the equipment maintains structural reliability and repeatable sealing performance under continuous production schedules. High-efficiency thermal dynamics and parallel sealing head alignment safeguard against electrolyte vapor degradation, ensuring zero seal failure and consistent barrier performance across intensive testing and production cycles.

Key Features

• High-Conductivity Copper Sealing Heads: Fabricated from premium copper alloy, the dual heated sealing bars deliver superior thermal conductivity and rapid heat transfer compared to conventional steel tooling. This rapid heat dissipation and uniform surface temperature profile minimize electrical power consumption, shorten thermal recovery intervals, and prevent local hot spots from degrading delicate pouch laminate films.
• Precision Linear Guide Alignment: Both upper and lower sealing heads are driven by independent pneumatic cylinders guided by high-precision twin linear guide bushings. This mechanical configuration eliminates angular deflection and axial runout, ensuring exceptional parallel contact across the entire 340 mm effective sealing span with a total thickness variance of less than 15 µm between any two measuring points.
• Adjustable Dual-Regulator Pressure Delivery: The sealing system incorporates dedicated precision pressure regulation valves, allowing operators to fine-tune clamping force continuously from 0 to 7 kg/cm². This granular adjustment enables exact optimization for varying foil barrier thicknesses ranging from 60 µm to 300 µm without risk of laminate thinning or barrier rupture.
• Pneumatically Guided Vacuum Chamber: The chamber housing is actuated by a robust pneumatic cylinder riding on rigid linear guide bushings, ensuring smooth lid opening, repeatable stroke positioning, and reliable gasket compression for airtight deep-vacuum cycling reaching at least -98 kPa.
• Advanced PID Temperature Regulation: Integrated digital thermal controllers provide independent closed-loop management from ambient up to 260 °C with tight ±2 °C stability. This accurate thermal maintenance guarantees full cross-linking and fusion of inner polypropylene (PP) sealant layers across every operating cycle.
• Corrosion-Resistant Aluminum Alloy Chamber: The vacuum enclosure is machined from high-strength aluminum alloy treated to resist aggressive electrolyte vapors, solvents, and corrosive fluorinated by-products generated during formation puncture and degassing operations.
• Integrated Puncture and Degassing Mechanism: Seamlessly combines puncture air-release and final vacuum heat sealing within a single contained vacuum cycle, preventing external atmospheric contamination and eliminating the need for intermediate cell transfers.
• Energy-Optimized 1 kW Architecture: Operating on a standard single-phase 220V/50Hz power supply with optimized thermal insulation and low-draw pneumatic logic, the system delivers heavy-duty industrial throughput while keeping overall laboratory utility overhead minimal.

Applications

Technical Specifications

Why Choose This Product

• Superior Sealing Parallelism: Twin linear guide bushings eliminate rotational wobble and axial shift, ensuring high structural flatness and uniform seal thickness within a tight 15 µm tolerance band across every cell.
• Optimized Thermal Efficiency: High-grade copper sealing jaws provide fast thermal recovery and low power consumption, preventing cycle delays and eliminating edge-burning defects during continuous laboratory sealing runs.
• Rugged Industrial Build: Built with thick-wall aluminum alloy vacuum chambers and heavy-duty pneumatic actuators, this system withstands aggressive electrolyte vapors and thousands of continuous degassing cycles.
• Process Flexibility: Fully independent pressure, temperature, and cycle time configurations accommodate diverse pouch sizes up to 340 mm wide and laminate thicknesses between 60 µm and 300 µm.
• Comprehensive Process Compatibility: Engineered for seamless integration into dry room facilities and pilot fabrication lines, backed by dedicated technical support and responsive tooling customization.

Contact our technical sales team today to request a detailed quotation, discuss custom sealing die configurations, or find the ideal battery assembly solution for your laboratory.

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