​ Xiangyang Tenglong Automotive Develops High-Capacity DC Fast Charging System with Enhanced Plug Retention

Addressing Charging Stability Issues in Electric Vehicle Infrastructure

The transition from traditional internal combustion engine vehicles to new energy vehicles is imperative under the dual pressures of the energy crisis and environmental pollution. As a critical component of the new energy vehicle industry, DC fast chargers directly influence the pace of EV adoption. While pure electric vehicles offer advantages over hybrids—simplified powertrains, reduced energy loss and noise from mechanical friction, and lighter vehicle weight—their widespread adoption depends heavily on reliable charging infrastructure.

Existing charging devices suffer from significant drawbacks. Charging plugs lack effective retention mechanisms during charging, often loosening when bumped by external factors, interrupting the charging process. Furthermore, prolonged use deforms the contact blocks inside the plug, preventing proper current delivery.

To solve these challenges, the Tenglong Automotive engineering team has developed a high-capacity DC fast charging system featuring an innovative plug retention mechanism.

Engineering Excellence: Secure Plug Retention and Impact Resistance

The RD06 project introduces several practical technical features designed for charging reliability:

Multi-Layer Spring Buffer System: An activity groove is formed on both the top and bottom of the plug body near the mounting block. An activity rod connects to the bottom of the groove, with an activity plate attached via a pin. A buffer spring connects the plate to the bottom of the groove, absorbing external impacts.

Dual Action Mechanism: An operating rod extends from the top of the activity plate through the plug body, while a first spring connects the other side of the plate to a support plate on the groove wall. A second spring is fixed to a clamping block, with first telescopic rods on both sides of the mounting plate providing additional stability.

Reliable Locking Engagement: The clamping block is pressed by the second spring and engages with a corresponding slot inside the vehicle's charging port. This ensures the plug remains firmly secured during charging, free from external interference.

Proven Results and Intellectual Property

The project has successfully been granted a national utility model patent: "A DC Charging Device for Electric Vehicles". The device ensures that the charging plug maintains a strong retention effect even when subjected to external impacts, preventing loosening and enabling smooth current delivery.

The final evaluation committee concluded that the project has met all technical indicators, with the device planned for application in pure electric city buses and spraying vehicles.

Commitment to Reliable Charging Infrastructure

This project underscores Xiangyang Tenglong Automotive's dedication to advancing new energy vehicle technology. By integrating this patented DC fast charging system into our product lineup, we continue to provide our customers—including the Xiangyang public bus system and government agencies—with reliable, stable, and "warm-hearted" intelligent transportation solutions.

Xiangyang Tenglong Automotive: "Building good cars with a craftsman's heart."

RD06 Project Proposal for Development and Design of a High-Capacity DC Fast Charging System Device