The DC charging station for electric vehicles adopts a modular design, including power modules, a charging controller, metering devices, charging interfaces, and a human–machine interface (HMI). It is easy to operate, safe and reliable, occupies a small footprint, and offers high charging efficiency. It complies with the latest national standards and is suitable for charging electric vehicles of different specifications and power levels, in line with the development direction of new energy technologies.

The preferred rated DC output power options are 60 kW, 80 kW, 120 kW, 160 kW, and 240 kW. The structural configurations include integrated and split types (one unit serving multiple chargers). Charging interfaces are available in single-gun, dual-gun, and multi-gun versions, enabling simultaneous charging, sequential charging, and automatic power allocation. Products can also be customized according to customer requirements.

1. Function Description

1.1 Human–Machine Interface (HMI)

The charging station can display parameters such as charging time, set parameters, battery temperature, and battery SOC (State of Charge).

1.2 Communication Function

The charging station communicates with the electric vehicle’s Battery Management System (BMS).

1.3 Monitoring Function

The charging station communicates with the upper-level monitoring and management system.

1.4 Applicable Batteries

The charging station supports charging of various battery types, including lithium-ion batteries, nickel–metal hydride batteries, and lead-acid batteries.

1.5 Charging Modes

Charging parameter settings include manual and automatic modes:

• Automatic Mode: During the charging process, the charging station dynamically adjusts charging parameters based on data provided by the vehicle’s BMS and performs corresponding actions to complete the charging process.

• Manual Mode: The operator sets parameters such as charging voltage and charging current. The charging station performs the corresponding actions based on the set parameters to complete the charging process.

1.6 Metering Function

The charging station can measure the electrical energy output of each charging interface.

1.7 Payment Function

Supports both QR code payment and card payment. Recharge cards can be issued for direct card payment at the charging station, and payments can also be completed by scanning QR codes via WeChat or Alipay.

1.8 Protection Functions

1) Input-side overvoltage, undervoltage, and short-circuit protection;

2) Prevention of battery current backflow;

3) Battery reverse-connection protection;

4) Emergency stop function, enabling immediate charging shutdown via a manual switch or upper-level monitoring command;

5) Overcharge protection to ensure battery temperature, charging voltage, and charging current do not exceed allowable limits;

6) Communication status monitoring, stopping charging when communication with the vehicle BMS is interrupted;

7) Charger over-temperature protection, automatically cutting off DC output and issuing an alarm when excessive temperature is detected;

8) Charging gun over-temperature protection, reducing output power or stopping output and issuing an alarm when excessive temperature is detected at the connector;

9) DC output-side overvoltage, overcurrent, and short-circuit protection;

10) DC output-side insulation monitoring and insulation degradation alarm;

11) Access control protection, issuing an alarm and stopping charging when the cabinet door is opened or not properly closed.