Method for protection of energy storage source, and in particular motor vehicle battery
First Claim
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.
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Accused Products
Abstract
A method for protection of an energy storage source (2), in particular 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) such as an alternator or an alternator-starter, the method comprising the following steps:
- permitting measurement of a charge level of the energy storage source, this 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 it;
- comparing a value (SENSE) of this measurement with a reference value (Max_SP);
- 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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Citations
9 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5)
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6. A regulator for a rotary electric machine being an alternator or an alternator-starter, said regulator comprising:
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a logic block (30) receiving at least one item of information representative of a charge level of an energy storage source, a reference value and an item of information representative of a functioning mode of said rotary electric machine selected from a plurality of functioning modes, and comparing said information representative of said charge level of said energy storage source, with said reference value, at least when said rotary electric machine is functioning in a predetermined mode detected by said logic block; a maximum command detection block (31) provided to generate said reference value selected as the maximum of an internal command and an external command detected by said detection block; a field controller (15) provided to receive an order from said logic block in order to interrupt the excitation applied to said rotary electric machine, when, further to said comparison, said logic block (30) detects an excessive charge level of said energy storage source during said functioning mode. - View Dependent Claims (7, 8, 9)
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Specification