In the manufacturing process of flow batteries (such as all-vanadium redox flow batteries and zinc-bromine batteries), the assembly quality of the stack directly determines the battery's Coulombic efficiency, energy efficiency, and sealing lifespan. The flow battery stack assembly press is specialized equipment developed to meet the requirements of large-area compression, high pressure uniformity, and stringent sealing demands of flow batteries.
This equipment is primarily used for compressing, positioning, and thermally curing (e.g., adhesive bonding and sealing) the stacked cells, ensuring that hundreds of bipolar plates, electrodes, and membranes maintain parallelism and flatness under high pressure. This guarantees uniform flow channels and long-term, leak-free operation.
PRODUCT DESCRIPTION
Core Functions
●Precision Pressing and Dwell Pressure: Applies a settable constant pressure for vertical compression of the stacked stack, eliminating gaps between bipolar plates and gaskets.
●Thermal Compression Curing (Optional): Integrates heating and temperature control systems suitable for curing sealing adhesives such as epoxy resin, achieving integrated bonding of frames and plates.
●Dimensional Positioning and Locking: After pressing, assists operators in tightening side plate bolts or securing straps to prevent spring-back.
●Data Traceability: Records process data such as pressure, displacement, temperature, and time in real-time, supporting MES system integration for full lifecycle quality traceability.
Technical Features
1. High-Precision Servo Control
●Utilizes large-tonnage servo electric cylinders or servo hydraulic systems combined with high-precision pressure sensors to achieve closed-loop control.
●Pressure control accuracy: Up to ±0.5% F.S.
●Displacement control accuracy: Up to ±0.01mm.
●Supports "pressure-displacement" hybrid control mode to prevent plate breakage due to pressing overshoot.
2. Extra-Large Platen and High Parallelism
●Flow battery stacks typically have a large area (single plates can exceed 1m²). The equipment features a high-strength integrated frame structure optimized through finite element analysis, ensuring minimal deformation of the pressing plate under large spans and high tonnage.
●Pressing plate parallelism: Typically controlled within 0.05mm/m, ensuring uniform pressure on the stack and preventing internal short circuits.
3. Multi-Stage Pressure Curve Process
Built-in multiple pressing process recipes. For flow battery stack assembly, it can execute an automatic cycle of "rapid approach -> low-pressure pre-pressing (leveling) -> high-pressure dwell (compressing seals) -> pressure relief and locking," meeting complex assembly process requirements.
4. Safety Protection and Poka-Yoke
Equipped with safety light curtains, two-hand start, and emergency stop devices. Additionally, laser ranging or displacement sensors monitor the pressing thickness in real-time. If an incorrect number of stacked plates or foreign object inclusion is detected, the system automatically alarms and stops.
Project Parameters
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