Patent ID: 11322963

Abstract:
A control method for a power supply, in which a link capacitor is connected between an external load and a power relay assembly (PRA) that includes a precharge resistor to control a power flow between a battery and the external load, the control method including: initiating precharge; after the initiating of the precharge, measuring voltages of the link capacitor by measuring a first voltage V1 of the link capacitor at a first time T1, measuring a second voltage V2 of the link capacitor at a second time T2, and measuring a third voltage V3 of the link capacitor at a third time T3, the first time T1, the second time T2, and the third time T3 each being different times; calculating a capacitance C of the link capacitor using the first voltage V1, the second voltage V2, and the third voltage V3; and terminating the precharge.