Formation and Capacity Grading Turnkey Solutions for Cylindrical Cell

Formation and Capacity Grading Turnkey Solutions for Cylindrical Cell

Pengjin delivers Formation and Capacity Grading Turnkey Solutions for cylindrical cells, along with fully Automated Lithium Battery PACK systems. Our complete Battery PACK Production Line includes cell grading, sorting, module assembly, welding, and final PACK integration with real-time monitoring and quality inspection. From a single Battery Solution to a full-scale Lithium Battery Manufacturing Solution, Pengjin offers flexible, high-efficiency systems tailored to your needs. Our Automated PACK Lines ensure stable performance, reduced labor, and faster throughput. Rely on Pengjin to power your Battery PACK Assembly Line with intelligent automation and proven engineering.

Description

1. Suitable for high-volume, high-speed manufacturing of cylindrical lithium batteries across various systems, compatible with 18650/21700/34 series/46 series.

2. The production line efficiency reaches up to 350 PPM for small cylindrical cells and 200 PPM for large cylindrical cells.

Solution Advantages

1. High-Efficiency

- Ultra-High-Speed Grading Capability:

- Small Cylindrical Cells (18650/21700): Grading speed up to 350 PPM (industry-leading), with single-line annual capacity exceeding 1.5 GWh, meeting high-volume power battery demands.

- Large Cylindrical Cells (34/46 Series): Grading speed up to 200 PPM, adapted for long-cycle grading processes of high-capacity cells, with annual capacity exceeding 1.0 GWh.

- Precision Formation Control:

- Utilizes multi-stage CC-CV (Constant Current-Constant Voltage) strategy to optimize SEI film formation, improving cycle life by 10%+.

- Voltage/current control accuracy ≤ ±0.05%, ensuring capacity deviation < 1% per cell.

2. Dedicated Thermal Management

- Axial & Radial Bidirectional Temperature Control: Addresses core cooling challenges in cylindrical cells, achieving temperature uniformity of ±0.5°C to prevent localized overheating and performance degradation.

- Dynamic Temperature Adjustment During Grading: Automatically adjusts charge/discharge temperatures based on SOC status, enhancing grading consistency with yield rates ≥ 99.5%.

3. Automation Solutions Tailored

- Automatic Loading & Sorting:

- Compatible with varying diameters (18mm/21mm/34mm/46mm) and heights (50-120mm), with model changeover time < 30 minutes.

- Employs machine vision + laser ranging for precise positioning, avoiding shell deformation caused by traditional clamping.

- Magazine-Style Formation Fixtures:

- Low-impedance contact solution specifically designed for cylindrical cells, minimizing voltage fluctuation with detection accuracy of ±0.5 mV.

4. Energy-Saving Design Optimized

- Energy Feedback Discharge: Designed for high-current discharge characteristics of cylindrical cells, achieving feedback efficiency ≥ 85%, saving 30%+ energy compared to traditional resistive discharge.

- Modular Grading Racks: Flexible channel configuration based on cell size, improving space utilization by 20%.

5. Data Traceability

- Deep MES Integration:

- Tracks formation curves, grading data, and internal resistance changes for each cell, enabling root-cause analysis of defects (e.g., top lithium plating, bottom weak welding—unique to cylindrical cells).

- Automatically aligns grading data with laser-marked codes, ensuring one-to-one cell-data correspondence.