Method for Detecting a Faulty Connection of an Auxiliary Battery
First Claim
1. A method for detecting a faulty connection of a low-voltage auxiliary battery (6) incorporated in an auxiliary network (5) of a motor vehicle supplied by said auxiliary battery and by a non-reversible current source (4), such as a DC/DC voltage converter or an alternator, which is voltage controlled to supply an output voltage which is a function of the control setpoint voltages of said current source, wherein:
- at least one minimum and/or maximum voltage value, which cannot be reached by the voltage at the terminals of the auxiliary battery (6), is determined,the function of setpoint value is assigned to the minimum and/or maximum voltage value, and the current source (4) is controlled by sending said setpoint value to it,the voltage is measured at the terminals of the auxiliary network (5),and a faulty connection of the auxiliary battery (6) is deduced if there is a match between the measured voltage and the setpoint voltage.
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Accused Products
Abstract
A method for detecting a faulty connection of an auxiliary battery (6) incorporated in an auxiliary network (5) of a motor vehicle supplied by the auxiliary battery and by a non-reversible current source (4), such as a DC/DC voltage converter or an alternator, which is voltage controlled to supply an output voltage which is a function of the setpoint voltages. The detection method includes determining at least one minimum and/or maximum voltage value which cannot be reached by the voltage at the terminals of the auxiliary battery (6), then assigning the function of setpoint value to the minimum and/or maximum voltage value, controlling the current source (4) by sending the setpoint value to it, measuring the voltage at the terminals of the auxiliary network (5), and deducing a faulty connection of the auxiliary battery (6) if there is a match between the measured voltage and the setpoint voltage.
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Citations
9 Claims
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1. A method for detecting a faulty connection of a low-voltage auxiliary battery (6) incorporated in an auxiliary network (5) of a motor vehicle supplied by said auxiliary battery and by a non-reversible current source (4), such as a DC/DC voltage converter or an alternator, which is voltage controlled to supply an output voltage which is a function of the control setpoint voltages of said current source, wherein:
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at least one minimum and/or maximum voltage value, which cannot be reached by the voltage at the terminals of the auxiliary battery (6), is determined, the function of setpoint value is assigned to the minimum and/or maximum voltage value, and the current source (4) is controlled by sending said setpoint value to it, the voltage is measured at the terminals of the auxiliary network (5), and a faulty connection of the auxiliary battery (6) is deduced if there is a match between the measured voltage and the setpoint voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification