Patent ID: 9440551
Filing Date: 2016-09-13
CPC Classification: B60L,H02H,Y02T

Claim Text:
1. A method for controlling a connection of a high voltage source of a motor vehicle to a high-voltage network of the motor vehicle, comprising: receiving with a control device of the motor vehicle a connection command; determining with the control device at least one test value for an electrical operating parameter of the high-voltage network by conducting a test current from the high-voltage source via a first pre-charge resistor to the connection, said first pre-charge resistor having a first resistance value, said at least one test value comprising a voltage value or a current strength value, said electrical operating parameter depending on a capacitance of the high-voltage network actually effective on a connection of the high-voltage source to the high-voltage network, said test current causing a first pre-charging of the actually effective capacitance, said first pre-charging being monitored by the at least first test value; when the at least one test value satisfies a predetermined safety condition, conducting a pre-charge current of the high-voltage source via a second pre-charge resistor, which limits the pre-charge current, to the connection and into the high-voltage network to charge the capacitance of the high-voltage network, said second pre-charge resistor having a second resistance value which is lower than the first resistance value; and blocking the pre-charging when the at least one test value does not satisfy the predetermined safety condition.