Introduction to High-Power (Liquid-Cooled) Charging Gun
As the penetration rate of new energy vehicles gradually increases, high-power fast charging has become the main way to solve the range anxiety problem of new energy vehicles. High-power liquid-cooled charging can realize the rapid charging of electric vehicles and solve the heat dissipation problem of fast charging under high voltage and high current environment, effectively avoiding charging anxiety of new energy vehicles, and complying with the GB/T20234 standard.
Composition and principle of liquid cooling system
Reco uses an electric pump to drive the flow of coolant, thus carrying away the heat generated by current loss as it passes through the liquid-cooled cables. The coolant then returns to the coolant tank, where the electric pump drives the radiator for further cooling. This cyclical operation allows small-section cables to carry high currents with low temperature rise.
Technical features
Current carrying capacity
Rated current:
500A (Φ24 cable),
600A (Φ28 cable),
700A (Φ30.5 cable);
Rated voltage: 1000V DC
Unique cooling structure design
The proprietary cooling component, through its structural design, forms a cooling chamber at the cable conduction point, allowing the coolant to flow through the entire mating contact area of the high-power terminal. It also features more than one cooling circulation path, connecting the internal and external coolant to form a circulation channel and achieving superior cooling performance.
Low resistance power terminals and cable termination methods
Contact resistance is an important quality indicator of cable and terminal termination, as it determines the heat generated at the termination point. This indicator is particularly important for high-power charging cables. To reduce heat generation at the termination point and improve current carrying capacity, ultrasonic welding of cables and contacts is recommended.
Meanwhile, in actual use, oil cooling means that the contact terminals and cables are immersed in the cooling medium. Traditional crimping methods accelerate the release of internal stress in the fluctuating oil temperature. As the usage time accumulates, the internal resistance of the crimped part will increase, affecting the cooling capacity of the entire cooling system. Ultrasonic welding, on the other hand, perfectly avoids this failure mode.
