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1. Electric Vehicle Production Line Overview
The electric vehicle (EV) production line is an intelligent, standardized system for pure electric/hybrid vehicles. It follows a core process: body manufacturing → chassis & three-electrics assembly → vehicle integration → inspection & testing.
Leveraging CNC equipment, collaborative robots, and an MES-driven management system, the line transforms raw materials into finished EVs. It supports flexible production of multi-model vehicles (cars, SUVs, MPVs). It adapts to diverse battery ranges.
2. Body Manufacturing Assembly Line: Lightweight & Precision
As the structural foundation of EVs, this line prioritizes lightweight design (high-strength steel/aluminum) and high precision (error ≤±0.05mm). This ensures body strength and safety.
First, multi-station CNC presses shape steel/aluminum plates into body parts (doors, roofs, chassis frames). Size deviation is controlled within ±0.05mm for assembly accuracy.
Then, 200+ welding robots (spot/laser welding) splice body parts. Online flaw detection eliminates missing welds. A laser measuring instrument calibrates body size in real time (overall deviation ≤2mm).
Post-welding, automated pretreatment (degreasing, phosphating) removes impurities. Electrophoretic coating (rust-proof base) and multi-color customizable paint/varnish are applied. High-temperature curing ensures weather resistance.
Stations connect via conveyor chains. This minimizes manual intervention errors.
3. Chassis & Tertiary System Assembly Line: Core Performance
This stage focuses on chassis reliability and integration of the “three electrics” (battery, motor, electronic control). It uses a “modular assembly + intelligent assistance” model.
AGV unmanned vehicles distribute chassis modules (suspension, braking systems) to workstations. Workers collaborate with robotic arms to splice components. They install steering gears/transmission shafts (for hybrids).
Battery packs (adaptable to 50kWh/70kWh ranges) are installed via special lifting robots. The motor and electronic control unit are fixed on powertrain brackets using positioning tooling.
Insulating torque wrenches (12–18N·m standard) and shielding layers prevent electromagnetic interference. Each process records component data (battery serials, motor models). The system verifies compatibility to avoid misinstallations (e.g., mismatched battery pack interfaces).
4. Vehicle Assembly Line: Flow & Collaboration
The final assembly adopts a “flow station + man-machine collaboration” design. It integrates interior/exterior components and functional systems.
Conveyor lines transfer combined bodies/chassis to stations. Doors and windshields are installed with automatic gluing (ensuring sealing/waterproofing).
Seats, instrument panels, and low-voltage harnesses (connecting lights, AC, vehicle-machine systems) follow. Front/rear bumpers, tires, mirrors, and dual-charge interfaces (fast/slow) are added.
Fluids (coolant, brake fluid) are filled. Windows/locks are debugged.
Key workstations use visual guidance systems (e.g., central control panel alignment deviation ≤1mm). This ensures assembly quality and efficiency.
5. Vehicle Inspection Line: Safety & Compliance
Multi-station inspection verifies safety, performance, and reliability. It aligns with national automotive standards.
- Appearance & Precision Check: Visual systems detect body scratches and component installation flatness.
- Dynamic Performance Test: A chassis dynamometer simulates driving conditions. It tests acceleration, braking distance (100–0km/h ≤40m), and cruising range (NEDC-tested). It monitors motor output and electronic control response.
- Three Electrics Test: Measures battery pack insulation resistance (≥1000MΩ). Tests fast-charging efficiency (≥80% capacity in 30 mins). Verifies operation stability from -30℃ to 60℃.
- End-of-Line (EOL) Test: Validates vehicle-machine communication, lighting, and AC functions. Unqualified vehicles divert to repair. Qualified units generate test reports.
6. Core Advantages
- Intelligence & Efficiency: Core processes (welding, three-electrics assembly) achieve >90% automation. A single line produces 200–300 units daily. Digital twin technology shortens production cycles by 20%.
- Flexible Production: Supports mixed-line manufacturing of cars, SUVs, and multi-range EVs. Model changes take ≤4 hours (via CNC mold replacement, robot program adjustment). This adapts to market orders.
- Full Traceability: MES/ERP systems collect real-time data (body welding pass rates, battery defect rates). They predict equipment failures (reducing shutdowns by 30%). Each EV has a unique VIN code. It is traceable to procurement, production, and testing for quality control.
- If you have any questions or needs about the automated assembly line, please contact us via email: [email protected]