由 Yaming 1. Charging Pile Production Line Overview
The charging pile production line is an automated system for manufacturing EV charging equipment. It follows a core process: precision shell processing → internal component assembly → full-performance testing → protective packaging.
Leveraging CNC equipment, intelligent tooling, and electrical testing systems, the line transforms raw materials into finished products. It supports DC fast-charging and AC slow-charging piles. It adapts to multi-power (30kW–240kW) production needs.
2. Shell Processing Line: Anti-Corrosion & Protection
This line ensures charging piles withstand outdoor environments. It focuses on anti-corrosion and high protection (IP54+).
First, CNC machines cut cold-rolled steel/aluminum plates based on pile type (vertical, DC/AC-mounted). They reserve charging gun interfaces, heat dissipation holes, and installation holes with error ≤±0.1mm. This ensures component alignment.
Then, CNC bending machines form the shell frame and internal compartments. These separate high-voltage/low-voltage areas to avoid interference. Automated gas-shielded welding reinforces the frame. Polished welds enter surface treatment.
Post-welding, shells undergo automated phosphating (rust-proof base). They receive electrostatic powder coating (60–90μm thickness, IP54+ protection). High-temperature curing ensures adhesion.
Finally, processed shells are scanned (model/batch marked). They are transported via conveyor lines, minimizing manual errors.
3. Internal Component Assembly Line: Electrical Safety
Adopting a “partitioned station + electrical safety management” model, this stage ensures circuit safety and functional reliability.
Conveyor lines move shells to workstations. First, workers install insulation separators. They fix grounding terminals (grounding resistance ≤4Ω).
Then, AGVs dispatch core components (charger modules, main control boards) to workstations per MES scheduling. Components are scanned for model matching before installation.
Workers use torque wrenches for critical steps (e.g., 30kW fast-charging pile bolts: 10–15N·m). They install insulating sleeves on high-voltage wiring to prevent leakage.
All assembly parameters (component numbers, wiring specs) are recorded via MES. Insulation detectors monitor circuits in real time to avoid misconnections. This ensures full traceability.
4. Full-Performance Testing Line: Compliance & Safety
Multi-station inspection verifies electrical safety, charging functions, and protective performance. It aligns with global standards.
- Appearance & Protection: Visual checks detect shell coating scratches and interface tightness. An IP54 waterproof test ensures no water inflow during spraying. Laser rangefinders confirm installation sizes.
- Electrical Tests: Equipment measures insulation resistance (≥500MΩ). It tests power frequency withstand voltage (AC piles: 2kV/1min; DC piles: 5kV/1min, no breakdown). Leakage current ≤30mA. Output accuracy ≤±1%.
- Function Simulation: Charging scenarios (e.g., GB/T 18487.1 compliance) test start-stop control and overload protection (auto power-off over rated power). DC piles undergo charging gun insertion/removal life tests (≥10,000 cycles).
Test data uploads to MES in real time. Unqualified products (e.g., protocol mismatches) divert to maintenance. Qualified units generate reports and proceed to packaging.
5. Finished Product Packaging & Storage Line: Protection & Traceability
This stage ensures transportation safety and warehousing efficiency for charging piles.
Qualified piles are wrapped in dust-proof film via automated winding. They are packed into custom cartons/wooden boxes with pearl cotton. This prevents cable extrusion.
Labels encode model, power, batch, and warnings (moisture-proof, anti-collision).
Post-packaging, AGVs transport piles to smart storage zones. Zones are categorized by “charging type + power level”. MES updates inventory data in real time for rapid order sorting.
Temperature/humidity sensors monitor storage. This avoids moisture-related electrical issues.
6. Core Advantages
- Safety & Precision: Core processes (punching, bending, welding) achieve >80% automation. Key size errors ≤0.1mm. 100% electrical inspection coverage ensures structural and circuit safety.
- Flexible Production: Supports mixed-line manufacturing of DC/AC piles and 30kW–240kW models. Product changeovers take ≤1.5 hours (via CNC program replacement, fixture adjustment). This adapts to diverse orders.
- Intelligent Management: MES collects real-time data (shell pass rates, defect rates). It predicts equipment failures (reducing shutdowns by 30%). Each pile’s unique traceability code links to processing, assembly, and inspection records. This facilitates quality control.
