Features such as its industry-leading round-trip efficiency (RTE), high-precision state of charge (SOC) control and cell-to-pack optimisation are achieved across multiple disciplines, Zheng says, “including electrochemistry, electrical engineering, electronics, thermodynamics, control technology, and prediction technology.”
“Huawei’s comprehensive control over the overall solution achieves 93.1% efficiency on the low-voltage side of the PCS at 25°C ambient temperature, with the SOC precision reaching 2.5% at both ends and 3% in the plateau,” Zheng says.
The integrated design covers full cell-to-pack thermal management, liquid-cooling systems and high-voltage silicon carbide (SiC) switching architecture. The setup offers unique performance advantages for long-duration energy storage (LDES) applications over other products on the market.
“We adhere to the string architecture and adopt an optimiser for each pack and a controller for each rack. These refined and effective management methods address electrochemical inconsistency, especially inconsistency in the battery lifecycle,” Zheng explains.
“In our next-generation solution, the AC voltage is increased to 1000 V AC for the first time based on SiC components. This reduces system loss and improves efficiency. Our unique, intelligent, distributed cooling technology increases the heat dissipation area. In addition, the high RTE, high consistency, high SOC level, and high availability improve the solution’s throughput by more than 10% compared with conventional solutions.”
