Moving object of contactless power transmission system, foreign object detection method, and storage medium

A foreign object detection method of a contactless power transmission system, wherein

• the contactless power transmission system performs contactless power transmission between a moving-object-side unit mounted on a moving object and a ground-side unit provided outside the moving object,
• the moving object includes a battery and the moving-object-side unit electrically connected to the battery,
• the moving-object-side unit includes a moving-object-side coil that receives or transmits power in a contactless manner from or to a ground-side coil provided in the ground-side unit, a power conversion device that is connected between the moving-object-side coil and the battery and performs power conversion between DC power and AC power, and a capacitor provided between the power conversion device and the battery, and
• the foreign object detection method performed by a processor comprises:
• disconnecting electrical connection between the battery and the moving-object-side unit before the contactless power transmission is performed;
• and
• operating the power conversion device in a disconnected state in which the battery and the moving-object-side unit are disconnected, and determining whether a metal foreign object is present between the moving-object-side unit and the ground-side unit.

A non-transitory computer-readable storage medium storing a foreign object detection program of a contactless power transmission system for causing a computer to execute a process, wherein

• wherein the contactless power transmission system performs contactless power transmission between a moving-object-side unit mounted on a moving object and a ground-side unit provided outside the moving object,
• the moving object includes a battery and the moving-object-side unit electrically connected to the battery,
• the moving-object-side unit includes a moving-object-side coil that receives or transmits power in a contactless manner from or to a ground-side coil provided in the ground-side unit, a power conversion device that is connected between the moving-object-side coil and the battery and performs power conversion between DC power and AC power, and a capacitor provided between the power conversion device and the battery, and
• the process comprises:
• disconnecting electrical connection between the battery and the moving-object-side unit before the contactless power transmission is performed;
• and
• operating the power conversion device in a disconnected state in which the battery and the moving-object-side unit are disconnected, and determining whether a metal foreign object is present between the moving-object-side unit and the ground-side unit.