US Patent 10000129 Electric vehicle charging via grid and engine

A vehicle includes an engine, a traction battery, a generator coupled to the engine and battery, and a controller. The controller may be configured to, in response to a current flowing from a battery charge station to the battery being less than a maximum charge current, a selection of a fast charge mode, and a temperature of the engine being less than a predetermined temperature, operate the engine to generate a supplemental current to charge the battery.