1. Field
The present disclosure relates to a charger that charges a battery, and in particular, relates to a charger that charges a battery of a vehicle that runs with a motor as a power source.
2. Related Art
Examples of this kind of vehicle include an electric vehicle and a hybrid vehicle. A battery of a high voltage dangerous to a human body is mounted as a power supply of a motor in this kind of vehicle, and a vehicle-mounted charger for charging the vehicle-mounted battery also uses high voltage, because of which sufficient consideration needs to be given to safety. ISO26262, officially published in 2011, is included as one automotive functional safety standard (see, for example, www.jari.or.jp/tabid/112/Default.aspx). An object of ISO26262 is to control risk to the extent that it is acceptable. Providing a function that forcibly stops all functions of the vehicle-mounted charger when a fault is detected is specified in ISO26262. This kind of vehicle-mounted charger commonly has such a configuration that an AC/DC converter and a DC/DC converter are connected in series, and it is conceivable that a function that forcibly stops both the AC/DC converter and the DC/DC converter when a fault occurs is provided in the charger.