| 摘要 |
System and method for secure charging of a motor vehicle battery. Method of secure charging of the battery (3) of a motor vehicle from a network (2) estimating the resistance between the earth and the neutral of the network (2), comprising at least one injection of pulses of current into the network (2), measurements of voltage between the earth and the neutral of the network (2) in response to each pulse, and a determination of the earth resistance from the measured voltages. Each injection of current pulses into the network (2) comprises the injection of a first positive pulse followed by a second negative pulse, the first and the second pulses having an equal intensity in terms of absolute value and being separated by a sufficiently short interval for a stray capacitor coupled to the network (2) to be further charged during the second pulse, the determination of the earth resistance being carried out on the basis of the amplitude of the pulses and voltages measured for the first pulse and the second pulse of each injection. |
