SUPPLY DEVICE HAVING A FUEL CELL DEVICE AND A BATTERY, AND METHOD FOR FROST-STARTING A SUPPLY DEVICE

A supply device for the electrical supply of at least one consumer has a primary current system in which there is a fuel cell device, a secondary current system in which there is a battery which has an operating voltage range limited at the top by a maximum voltage and at the bottom by a minimum voltage and which has an operating current strength range for supplying current to the at least one consumer, and a frost-starting element, which is provided in the primary current system and is designed to bring about heating of the fuel cell device. An open-circuit voltage of the fuel cell device corresponds at most to the maximum voltage of the battery.