US Patent 10882409 Onboard charging system including a heat exchanger

An onboard charging system includes an onboard battery, a vehicle-side coupling unit, a heat exchanger, a controller, and a charger. The onboard battery that is configured to be mounted on a vehicle and used to drive the vehicle. The vehicle-side coupling unit that is configured to make a charging current path to an outside-vehicle power feeding apparatus by being coupled to an apparatus-side coupling unit of the outside-vehicle power feeding apparatus. The heat exchanger that is provided in the vehicle-side coupling unit and configured to perform heat exchange between the vehicle-side coupling unit and the apparatus-side coupling unit. The controller that is configured to perform ON/OFF control of a function of the heat exchange performed by the heat exchanger. The charger that is configured to charge the onboard battery by using the charging current path.