METHOD FOR COUPLING AT LEAST ONE SECONDARY ENERGY SOURCE TO AN ENERGY SUPPLY NETWORK, IN PARTICULAR AN ON-BOARD VEHICLE POWER SUPPLY

摘要

The invention relates to a method for coupling at least one secondary energy source (12) to an energy supply network (10), in particular an on-board vehicle power supply, wherein a load (13) and a primary energy source (11) are connected having a first voltage characteristic. The at least one secondary energy source (12) has a second voltage characteristic which has an operating voltage range overlapping with the first voltage characteristic. The primary energy source (11) and the at least one secondary energy source (12) can be connected via a power switching device (18) to a node point (14) of an intermediate circuit (17) of the energy supply network (10), to which the load (13) is also connected. Before connecting a secondary energy source (12), the current drawn by the load (13) is regulated such that the voltage connected to the node point (14) of the intermediate circuit (17) corresponds to the idle voltage of the secondary energy source (12) to be connected or is around the idle voltage in a specified voltage range. In the case that the voltages correspond or if the voltage connected to the node point (14) lies in the specified voltage range, the secondary energy source (12) is electrically conductively connected to the node point (14) via the power switching device. The current required by the load is regulated to the corresponding value, wherein the load (13) is supplied from the primary and the secondary energy source (11, 12).