Apparatus for transmitting power and control method thereof

Abstract

Disclosed are an apparatus for transmitting power and a control method thereof. The apparatus includes a first main relay electrically controlling connection between a positive (+) terminal of a high voltage power source and a positive (+) terminal of a high voltage load, a second main relay electrically controlling connection between a negative (−) terminal of the high voltage power source and a negative (−) terminal of the high voltage load, a semiconductor switch connected in parallel to the first main relay, a reverse current preventer interposed between the semiconductor switch and the high voltage power source and preventing reverse current to the high voltage power source, a drive state measurer measuring a drive state of a power relay assembly, and a relay controller supplying or shutting off power to the high voltage load by operating the first and second main relays and the semiconductor switch in response to a relay enable signal from a battery controller and shutting off the power to the high voltage load upon determining that the drive state of the power relay assembly measured through the drive state measurer is abnormal or upon determining based on a vehicle state received from the battery controller that a vehicle is in an emergency state.