The 500W inverter liquid cold plate uses the friction stir welding process, and the inner flow channel is processed by CNC. Under the conditions of the flow rate of 10 liters per minute, the ambient temperature of 35 degrees, and the inlet water temperature of 25 degrees, the cold plate surface temperature is 65 degrees. Based on the calculation of the thermal resistance of the inverter package, the core chip temperature of the inverter is theoretically around 85 degrees, which fully meets the application requirements.