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METHOD FOR PROTECTION OF AN ENERGY STORAGE SOURCE, AND IN PARTICULAR A MOTOR VEHICLE BATTERY

  • US 20100053825A1
  • Filed: 07/17/2009
  • Published: 03/04/2010
  • Est. Priority Date: 08/26/2008
  • Status: Active Grant
First Claim
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1. Method for protection of an energy storage source (2), adapted to for use as a battery of a motor vehicle, against possible overloading caused by prolonged application of an electric voltage to the energy storage source, this voltage being generated at least partially by a rotary electric machine (1) adapted for use as an alternator or an alternator-starter, the method comprising the following steps:

  • permitting measurement of a charge level of the energy storage source, said charge level being represented for example by a voltage measured at the terminals of the energy storage source or a PWM signal, while the rotary electric machine is functioning in a predetermined functioning mode, and electric excitation is being applied to said electric machine;

    comparing a value (SENSE) of said measurement with a reference value (Max_SP), this reference value (Max_SP) being selected as the larger out of two command values (REF_INT;

    REF_EXT);

    if the value measured for the energy storage source is greater than the reference value, interrupting the excitation applied to the rotary electric machine.

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