Relay control system for electric vehicle and method for controlling relay of electric vehicle

摘要

A relay control system for an electric vehicle includes an electric power line, a relay, an operation member, a state sensor, a rotational speed detector, a shift position detector, and a relay disconnection permitting device. The state sensor is configured to sense that a signal circuit through which a signal related to a state of the operation member flows is changed into a disconnecting operation state. The rotational speed detector is configured to detect a rotational speed of the electric motor. The shift position detector is configured to detect a shift position of the electric vehicle. The relay disconnection permitting device permits disconnection of the relay based on the rotational speed detected by the rotational speed detector and the shift position detected by the shift position detector if the state sensor senses that the signal circuit is changed into the disconnecting operation state.

主权项

1. A relay control system for an electric vehicle, comprising:
an electric power line connecting an electricity accumulation device to an electric motor in the electric vehicle, the electricity accumulation device being configured to accumulate electric power, the electric motor being configured to output a drive force to move the electric vehicle; a relay disposed on the electric power line and configured to disconnect an electrical connection between the electricity accumulation device and the electric motor; an operation member configured to be operated by an operator to bring the relay into a disconnected state; a state sensor configured to sense that a signal circuit through which a signal related to a state of the operation member flows is changed into a disconnecting operation state; a rotational speed detector configured to detect a rotational speed of the electric motor; a shift position detector configured to detect a shift position of the electric vehicle; and a relay disconnection permitting device permitting disconnection of the relay based on the rotational speed detected by the rotational speed detector and the shift position detected by the shift position detector if the state sensor senses that the signal circuit is changed into the disconnecting operation state.