Decoding the Critical Role of Transformers in EV Charging Infrastructure

With global new energy vehicle ownership exceeding 20 million units, charging infrastructure faces unprecedented power demand challenges. In this green energy revolution, power transformers—the “heart of electricity”—are playing an irreplaceable core role in smart charging networks.

I. Three Core Functions of Transformers in Charging Infrastructure

1. Precision Voltage Conversion

• Steps down grid voltage (10kV/35kV) to charging pile-compatible levels (750V/380V)

• Supports full-scenario voltage needs, from 7kW slow charging to 480kW ultra-fast charging

• Maintains voltage fluctuation within ±2% to ensure battery safety

2. Stable Power Transmission Hub

• Handles transient current surges up to 3000A at charging stations

• Harmonic suppression technology reduces THD to <3% (industry standard: 5%)

• Dynamic load balancing improves equipment utilization by 30%

3. Smart Energy Management Brain

• Integrated IoT modules enable real-time efficiency monitoring

• Supports V2G technology for bidirectional power flow

• 5G remote diagnostics provide 72-hour fault warnings

II. Special Requirements for Transformers in New Energy Charging

✔ Ultra-High Efficiency: Amorphous alloy transformers reduce no-load loss by 65%
✔ Compact Design: 40% smaller footprint than traditional models
✔ Environmental Adaptability: Stable operation from -40℃ to +50℃
✔ Smart Interaction: Seamless integration with EMS energy management platforms

III. Cutting-Edge Industry Breakthroughs

1. Liquid-Cooled Transformers

• Power density increased to 5MW/m³

• Noise levels below 45dB (library-quiet)

2. Digital Twin Systems

• 3D modeling enables full lifecycle management

• 92% accuracy in fault simulation

3. Carbon-Neutral Solutions

• Plant-based insulating oil (30% higher flash point)

• 50% reduction in lifecycle carbon footprint

Case Study:
An international automaker’s supercharging station achieved after adopting smart transformers:

• Charging efficiency improved to 98.2%

• Equipment failure rate reduced by 76%

• Overall energy consumption lowered by 22%

IV. Future Development Trends

▶ Deep integration with PV energy storage systems
▶ Commercialization of solid-state transformer technology (expected by 2026)
▶ AI-powered autonomous voltage regulation

Jiangsu Electric Equipment CO.LTD a leader in new energy power solutions, has provided services for 300+ global charging station projects, including:

• CQC-certified dedicated charging transformers

• 24/7 smart maintenance services

• Customized solar-storage-charging integrated solutions