通过试验研究了亚纳米银流体与50%乙二醇水溶液作为冷却介质时，电机控制器液冷板的散热性能。在进口温度为70 ℃时，测试了不同流量下亚纳米银流体与50%乙二醇水溶液在加热负荷为2.5 kW，3.5 kW，4.5 kW和5.5 kW下的液冷板进出口温差与热源温度，并分析了散热效率。研究表明，当加热负荷为5.5 kW，质量流量为0.22 kg/s时，质量分数为700×10^-6的亚纳米银流体较50%乙二醇水溶液的液冷板进出口温差提高了6.28%，散热效率提升了6.8%。

The heat release performance of liquid cooling plate for motor controller was experimentally investigated using subnanometer silver fluid and 50% ethylene glycol-water solution as the coolant. At an inlet temperature of 70 ℃, the temperature difference between the inlet and outlet of liquid cooling plate and the heat source temperature were measured under varying flow rates and heating loads of 2.5 kW, 3.5 kW, 4.5 kW, and 5.5 kW. The heat release efficiency was subsequently analyzed. The results indicated that, at a heating load of 5.5 kW and a mass flow rate of 0.22 kg/s, the liquid cooling plate using subnanometer silver fluid with a mass concentration of 700×10^-6 exhibited 6.28% increase in the inlet-outlet temperature difference, and a 6.8% improvement in heat release efficiency compared to the 50% ethylene glycol-water solution.