​ Xiangyang Tenglong Automotive Launches Intelligent AC Charging Post with Auto-Correcting Current Control System

As electric vehicles continue to gain market share, the reliability of charging infrastructure has become a critical factor in user adoption. AC charging posts, essential for everyday charging needs, face two persistent challenges: current instability that can disrupt normal charging operations, and insufficient safety features such as leakage protection and vibration resistance.

Conventional charging devices lack real-time current detection and automatic correction capabilities, leaving them vulnerable to grid fluctuations and potential electrical faults. Furthermore, prolonged outdoor operation exposes charging posts to mechanical stress and environmental hazards, shortening their service life. 

To solve these challenges, the Tenglong Automotive engineering team has developed an intelligent AC charging post featuring an auto-correcting current control system designed for stable, safe, and reliable operation.

Engineering Excellence: Real-Time Current Correction and Multi-Layer Protection

This project introduces several sophisticated technical features designed for operational reliability:

▪ Dual-Power Supply with ESD Protection: The control system employs a dual-power supply design, with additional electrostatic discharge protection and electromagnetic interference shielding circuitry, ensuring stable operation under varying grid conditions.

▪ Harmonic and Reactive Current Detection: Based on instantaneous reactive power theory, the system derives and optimizes harmonic and reactive current detection algorithms, incorporating a sliding mean filter for precise current monitoring.

▪ Shock Absorption and Insulation: A damping device is integrated into the system, with an insulating sleeve fixed to the left side of the inner wall of the mounting frame. This design enhances shock resistance, extends service life, and enables safe power disconnection when the device is not in use, effectively preventing leakage.

▪ Intelligent Closed-Loop Control: A current sensor connects to a data comparator, which communicates via a feedback module to the central processor. The processor then directs the voltage regulator to maintain current within stable parameters. A keypad provides manual input capability to the central processor.

Intelligent Current Auto-Correction System

The patented core of this innovation is a closed-loop feedback mechanism that continuously monitors charging current. When fluctuations are detected, the system automatically commands the voltage regulator to adjust output, ensuring stable current delivery. This protects both the charging post and the vehicle's battery system from damage caused by current surges or drops.

Proven Results and Intellectual Property

The project has successfully been granted a national utility model patent: "An AC Charging Current Auto-Correction System for Electric Vehicles". The system features a practical design including a power cord, plug, cable reel, charging gun, and integrated current sensor within the gun body.

The final evaluation committee concluded that the project delivers comprehensive functionality, simple operation, and safe, reliable performance, with excellent market potential in EV charging infrastructure construction.

Commitment to Reliable Charging Solutions

This project underscores Xiangyang Tenglong Automotive's dedication to advancing electric vehicle charging technology. By integrating this intelligent AC charging system into our product ecosystem, we continue to provide our customers with stable, safe, and user-friendly charging solutions that support the growing adoption of pure electric buses, logistics vehicles, and specialty vehicles.

RD07 Project Proposal for Design of an AC Charging Post and Intelligent Charging Control System for Electric Vehicles