Patent ID: 9606161
Date: 2017-03-28
CPC Classifications: G01R

Claim:
1. An apparatus and method for diagnosing malfunction of a high voltage relay, the apparatus comprising: a first relay having a first terminal connected to a positive terminal of a battery and having a second terminal connected to a circuit using the battery as a power source, wherein the first relay is configured to connect or disconnect the battery and the circuit; a second relay having a first terminal connected to a negative terminal of the battery and having a second terminal connected to the circuit, wherein the second relay is configured to connect or disconnect the battery and the circuit; a first measuring unit configured to connect both terminals of the battery and measure a first voltage value across the both terminals of the battery; a second measuring unit configured to connect both terminals of the circuit and measure a second voltage value across the both terminals of the circuit; a third measuring unit connected to a battery side terminal among terminals of the first relay and a circuit side terminal among terminals of the second relay, and configured to measure a third voltage value between the battery side terminal and the circuit side terminal; and a controller configured to determine whether the first or second relay malfunctions based on the first voltage, the second voltage, and the third voltage values measured by the first, second, and third voltage measuring units by controlling connection and disconnection of the first or second relay.