Prismatic Aluminum Shell Battery Negative Pressure Formation and Grading Machine

Product Overview

This advanced vacuum formation and capacity grading system is engineered specifically for hard-shell prismatic lithium-ion batteries. Operating under precisely controlled thermal conditions up to 70°C and active vacuum pressure ranging from -15 kPa to -75 kPa, the equipment rapidly accelerates solid electrolyte interphase (SEI) film formation. By actively extracting internal decomposition gases throughout the electrochemical activation process, the system significantly shortens production cycle times and ensures optimal cell stability.

Designed to handle aluminum-cased cells across broad dimensional ranges, this multi-functional unit integrates high-precision formation, automated needle-bed contact, and rigorous capacity grading within a single compact footprint. The mechanical tooling incorporates specialized clamping fixtures—configured in 8-cell sets with torque-calibrated retention—to suppress cell expansion and guarantee uniform internal electrode layer contact. Target industries include electric vehicle battery prototyping, grid-scale energy storage manufacturing, and high-performance battery R&D laboratories.

Engineered with an independent dual closed-loop circuit architecture for constant current and constant voltage control, the system delivers industrial-grade reliability and high energy efficiency (>65%). With a 24-bit analog-to-digital sampling resolution, integrated DCIR determination, and comprehensive safety protections, this formation solution guarantees repeatable electrochemical quality, prolonged battery life cycles, and superior production yields under demanding 24/7 manufacturing schedules.

Key Features

• Integrated Negative Pressure and Thermal Activation: Combines controlled heating up to 70°C with dynamic vacuum extraction (-15 kPa to -75 kPa) to remove gases generated during formation, optimize SEI layer density, and shorten the activation cycle.
• Dual Closed-Loop Channel Control: Utilizes independent hardware architecture for constant current (CC) and constant voltage (CV) modes, eliminating cross-channel interference and ensuring exceptional response stability across all testing phases.
• High-Precision 24-Bit AD Conversion: Features 24-bit AD and 16-bit DA signal processing with four-wire Kelvin sensing, delivering voltage and current accuracy of ±0.05% FS and power measurement precision within ±0.1% FS.
• Rapid Dynamic Switching: Achieves a current rise time of ≤1 ms (10% to 90% FS) and charge-to-discharge switching in ≤10 ms (-90% to 90% FS), facilitating millisecond-level pulse profile simulation and DCIR testing.
• Multi-Range Current Flexibility: Offers four software-switchable current ranges (1A, 6A, 12A, 30A) with a minimum output current of 5 mA and CV cutoff detection down to 0.2 mA, accommodating versatile cell capacities.
• Calibrated Expansion Clamping Fixtures: Employs precision mechanical restraint fixtures (8 cells per set) with adjustable manual or torque-wrench tightening to prevent prismatic cell swelling during gas evolution phases.
• Energy-Efficient Regenerative Topology: Incorporates an advanced power electronics design achieving over 65% power efficiency, reducing operational heat dissipation, facility HVAC loads, and electricity consumption.
• Comprehensive Multi-Condition Cutoff: Allows automated test progression based on voltage, current, relative duration, accumulated capacity, energy throughput, negative delta voltage (-ΔV), and custom programmed logic.

Applications

Technical Specifications

Why Choose This Product

• Superior SEI Quality via Dual Thermal-Vacuum Control: Integrating controlled thermal regulation up to 70°C with negative pressure extraction ensures rapid gas removal and denser, more uniform passivation layers, significantly extending battery cycle life.
• Laboratory-Grade Precision in Industrial Tooling: Leveraging 24-bit AD acquisition and 4-wire Kelvin sensing delivers ultra-precise ±0.05% FS current and voltage control, ensuring flawless measurement integrity from micro-current cutoff to 30A high-power testing.
• Robust Mechanical Restraint Engineering: Specialized 8-cell fixture modules with calibrated mechanical pressure retention protect prismatic aluminum shells from dimensional deformation and internal delamination during high-rate formation.
• Dynamic Pulse and DCIR Capabilities: Sub-millisecond response and flexible 32-pulse programming empower advanced battery engineers to evaluate dynamic internal resistance and real-world drive cycle profiles with uncompromising repeatability.
• Comprehensive Process Customization and Support: Designed with customizable tooling dimensions, adaptable needle beds, and worldwide technical assistance, this platform seamlessly adapts to evolving pilot lines and mass production workflows.

Contact our technical sales team today to discuss your cell specifications, request detailed drawings, or receive a customized quotation tailored to your battery formation requirements.

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