CRRC has proposed custom development for the mining vehicle fleet scenario, which imposes stringent requirements on charging stations: high protection, high charging power, and rugged durability. These charging stations are mainly used for the client’s mining vehicles, with a single‑gun configuration and high power output design.
In the harsh mining environment, charging stations must simultaneously meet multiple strict requirements for high protection, high power, and high reliability. They also need to adapt to the single‑gun, high‑power charging mode dedicated to mining vehicles, which poses high technical challenges in product design, hardware manufacturing, and system stability.
Addressing market painful points: With the continuous increase in charging power, simply raising the current-carrying capacity has led to poor design feasibility of charging cables and a subpar charging experience. Therefore, increasing the charging voltage to boost power output has become an inevitable trend for high-power electric equipment. The high-voltage ultra-fast charging station is thus more aligned with the market demands of such special charging scenarios, maximizing charging efficiency. The system delivers a total power of 400KW, with a single-gun max current of 250A and a wide DC output voltage range of 200-1600V.
The core AC-DC power conversion unit adopts a modular design, with each module rated at 50KW. It features all-digital control technology, supports CAN communication, and is suitable for parallel connection of multiple modules with active current sharing technology, enabling convenient capacity expansion and maintenance.
The single gun is designed for a max output current of 250A and a max output power of 400KW. The charging cable is engineered to withstand ultra-low temperature of -40°C, making it applicable to most low-temperature scenarios and meeting the requirements of the majority of charging operation conditions.
Tailored to the harsh environmental demands of steel plants, mines, ports and other special sites, the cabinet is designed with an IP55 protection rating. It can prevent the ingress of fine dust particles from all directions without affecting the normal operation of the equipment, and withstand low-pressure water jetting from any angle under normal working conditions without sustaining damage.
A centrifugal fan is adopted as the main cooling fan with an optimized air duct structure, where the air inlet and outlet form independent air channels. The cooling capacity is selected based on the total heat generation of the modules, leveraging verified thermal design experience from our mass-produced models to ensure effective heat dissipation under high-temperature conditions. The EV charging station is equipped with a smoke detector, if smoke concentration exceeds the detector’s threshold due to equipment failure, the control system will automatically cut off the control power supply and trigger a light alarm to prevent major fire accidents. A water intrusion alarm is also installed in the EV charging station.
Developed in accordance with the client’s dimensional requirements and based on our existing product, the EV charging station adopts ceramic high-voltage DC contactors, tempered glass panels with light boards, insulating protection plates, and optimized copper busbar design. The internal layout of electrical components, as well as the cooling and protection designs, have all been upgraded and optimized.
After the charging stations are installed, the 400KW high power and wide voltage output improve the charging efficiency greatly and shorten the charging time. The IP55 protection, -40℃ low temperature resistance and efficient heat dissipation design are suitable for harsh mining working conditions and ensure continuous all-weather operation. High-quality components and multiple protections enhance the durability and safety of the equipment, reducing operation and maintenance as well as safety costs.
Xinya Dongfang Electricity Technology Co., Ltd.
