Patent ID: 10115549

Abstract:
An electrical storage system includes an electrical storage device, a load, a positive electrode line, a negative electrode line, a first relay, a second relay, a third relay, a drive circuit and a controller. The drive circuit includes a coil, a first power line, a second power line, and a sensor. The first power line includes a first switch element and a second switch element connected in series with each other. The second power line includes a second resistive element and a third switch element connected in series with each other. The drive circuit is configured to cause both the second and third relays and the first relay to operate at different timings. The controller is configured to control operation of the drive circuit. The controller is configured to output a control signal for setting each switch element to the non-energized state, and determine whether any one of the switch elements has a failure in the energized state on the basis of the output signal of the sensor.