Rotary Secondary Vacuum Sealing Machine for Polymer Lithium Battery Packaging

Product Overview

This rotary secondary vacuum sealing machine is designed for the vacuum packaging process of polymer lithium batteries. Its dual-fixture rotary arrangement alternates cells between loading and vacuum sealing positions, allowing an operator to prepare the next cell while the other fixture is processing. This sequencing supports continuous operation without making cell clamping time a direct interruption to the sealing cycle.

The equipment is intended for polymer lithium battery manufacturing and laboratory-scale battery processing where vacuum extraction, gas-bag piercing, and thermal sealing must occur in a controlled sequence. It accommodates cells up to 350 mm long, 140 mm wide, and 12 mm thick, making it suitable for a range of pouch-cell formats within the stated dimensional envelope.

Built around aligned copper heat-sealing heads, controlled vacuum handling, and an adjustable rotary drive, this unit is configured for repeatable operation. Electrolyte collection and filtration provisions help protect the vacuum system, while touchscreen fault indication and manual adjustment functions support practical daily operation and setup.

Key Features

• Dual-Station Alternating Rotary Design: Two fixtures rotate in sequence between loading and vacuum sealing positions. While one cell enters the vacuum sealing area, the other position can be used for cell loading or unloading, helping keep the workflow moving.

• Precision Turntable Positioning: The rotary table provides positioning accuracy of +/-0.05 mm. This controlled indexing supports consistent fixture placement as cells move into and out of the vacuum chamber.

• Controlled Vacuum Sealing Sequence: After the chamber closes, the vacuum pump evacuates the chamber to a low set value before the piercing mechanism opens the gas bag. Sealing is completed after the chamber reaches its ultimate vacuum condition, reducing contact between the cell interior and air during the stated process.

• High-Vacuum Capability: The equipment can achieve vacuum of -95 kPa or above when used with a customer-supplied vacuum pump. The vacuum process is paired with a dedicated electrolyte filtration arrangement on the vacuum piping.

• Adjustable Thermal Sealing: The sealing-head operating temperature range extends from room temperature to 250 degrees C, with temperature control accuracy of +/-2 degrees C. Seal time is adjustable from 1 to 99 seconds, allowing the thermal cycle to be set for the applicable packaging operation.

• Copper Heat-Sealing Heads: Upper and lower copper heat-sealing heads have a 6 mm width as standard. The sealing-head width can be customized according to user requirements, providing a defined basis for adapting the sealing interface.

• Parallel Upper Sealing Motion: The upper sealing bar uses a pneumatic double-linkage cylinder structure. This arrangement is designed to maintain parallel movement of the upper sealing bar during the sealing action.

• Automatic Sealing-Head Alignment: The upper and lower sealing heads include automatic correction functionality. The specified distance between the sealed edge and the edge of the cell packaging case is no more than 0.5 mm.

• Flexible Piercing Arrangement: The piercing knife is positioned within 10 mm of the sealing bar and uses a dense layout. This configuration is stated to support both larger and smaller cells during the gas-bag piercing stage.

• Electrolyte Management Protection: An electrolyte recovery slot is integrated into the rotary table for collection and cleaning. The vacuum line also includes electrolyte filtration to help prevent electrolyte return to the vacuum system and the associated corrosion risk.

Applications

Technical Specifications

The operating sequence begins when a cell is placed in a fixture on the rotary table and the start button is pressed. The table rotates 180 degrees to move the cell into the vacuum sealing work area. The vacuum chamber closes and the vacuum pump begins evacuation. Once the chamber reaches a lower preset vacuum value, the piercing knife opens the gas bag. When ultimate vacuum is reached, the upper sealing bar completes the seal.

On the next start-button cycle, the table rotates another 180 degrees. The sealed cell moves out of the work area and the unsealed cell enters the vacuum sealing area. This alternating cycle is the basis of the unit's dual-fixture operating arrangement.

Why Choose This Product

• Process-Oriented Dual-Fixture Construction: The rotary layout separates loading and sealing positions, allowing cell handling to occur alongside the alternating vacuum-sealing cycle. This configuration is directly suited to repeated polymer lithium battery packaging operations.

• Defined Positioning and Sealing Controls: +/-0.05 mm positioning accuracy, adjustable 1-99 second sealing time, +/-0.1 second timing accuracy, and temperature control to +/-2 degrees C provide clearly specified control points for the sealing operation.

• Attention to Vacuum-System Protection: The electrolyte recovery slot and filtered vacuum piping address electrolyte handling around the vacuum process. These provisions help reduce electrolyte return to the vacuum system and its stated corrosion exposure.

• Practical Format Adaptability: Adjustable rotary speed, customizable 6 mm sealing-head width, dense piercing-knife placement, and spring-cylinder compression support use across cell sizes within the stated maximum dimensions.

• Serviceable Industrial Build: The aluminum-alloy frame, baked gray-white sheet-metal finish, rust-prevention treatment for machined parts, touchscreen fault display, and manual setup function provide an equipment-focused foundation for operation and adjustment.

Contact us for a quote or to discuss a custom sealing-head configuration and process solution for your polymer lithium battery packaging requirements.

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