Patent ID: 8164867
Filing Date: 2012-04-24
Classification: H02J,Y02T

Abstract:
1. A method for protection of an energy storage source ( 2 ) of a motor vehicle against possible overloading caused by prolonged application of an electric voltage to said energy storage source, said electric voltage being generated at least partially by a rotary electric machine ( 1 ) being an alternator or an alternator-starter, the method comprising the following steps: measuring of a charge level of said energy storage source, said charge level being represented by a voltage measured at terminals of said energy storage source or a PWM signal, while said rotary electric machine functioning in a predetermined functioning mode and electric excitation applied to said electric machine; comparing a value (SENSE) of said charge level with a reference value (Max_SP), said reference value (Max_SP) being selected as the larger out of two command values (REF_INT; REF_EXT); if said value of said charge level measured for said energy storage source is greater than said reference value, interrupting the excitation applied to said rotary electric machine.