| 主权项 |
1. A control apparatus for a power-supply apparatus, the power-supply apparatus including a plurality of power-supply systems connected in parallel between a pair of power wires connected to an electrical load, each power-supply system having a series circuit of a battery and a contact of a main relay provided for the battery, the control apparatus comprising
a controller configured to determine whether at least one of the plurality of main relays suffers from a contact welding, wherein: when the controller determines that the at least one of the plurality of main relays suffers from the contact welding, the controller performs a battery charge/discharge process to charge/discharge the plurality of batteries through the pair of power wires by turning ON one of possible main relays out of the plurality of main relays while turning OFF the others of the possible main relays, each possible main relays defined as having a possibility of suffering from the contact welding, after the battery charge/discharge process, the controller performs an identification process to identify which possible main relay actually suffers from the contact welding based on a change in a state of the battery connected in series with the contact of each possible main relay, the controller repeatedly performs the battery charge/discharge process and the identification process by turning ON each of the possible main relays in turn while turning OFF the others of the possible main relays, the plurality of power-supply systems includes a first power-supply system and a second power-supply system, when the controller determines that the main relay of at least one of the first power-supply system and the second power-supply system suffers from the contact welding, the controller determines whether the main relay of the first power-supply system suffers from the contact welding by performing the battery charge/discharge process by turning ON the main relay of the first power-supply system, and when the controller comes to no conclusion on whether the main relay of the first power-supply system suffers from the contact welding after the battery charge/discharge process, the controller determines whether the main relay of the first power-supply system suffers from the contact welding by performing the battery charge/discharge process by turning ON the main relay of the second power-supply system. |
