Patent ID: 9647547
Date: 2017-05-09
CPC Classifications: H02J,H02M

Claim:
1. A voltage conversion device comprising: a battery; a step-up circuit capable of stepping up a voltage input from the battery; a battery voltage sensor for detecting a battery voltage; an input voltage sensor for detecting the input voltage of the step-up circuit; an input current sensor for detecting the input current of the step-up circuit; and a control unit to which detected values are input from the respective sensors and which controls the step-up operation of the step-up circuit, wherein the control unit determines whether one of the battery voltage sensor and the input voltage sensor is abnormal on the basis of an estimated input voltage value calculated based on the input current of the step-up circuit, the input voltage of the step-up circuit and the battery voltage, without stopping the step-up operation of the step-up circuit; and wherein instead of controlling the step-up operation of the step-up circuit with one of the battery voltage sensor and the input voltage sensor that is determined to be abnormal, control of the step-up operation of the step-up circuit is continued using the detected value of the battery voltage.