System for monitoring the state of a battery
First Claim
1. A monitoring system for a battery having a plurality of accumulators, the system comprising:
- means for measuring the voltage at the terminals of each accumulator;
means for measuring the temperature of the battery;
means for measuring the current flowing through the battery;
means for calculating a voltage difference between a maximum voltage measured on the terminals of one of the accumulators and a minimum voltage measured on the terminals of one of the accumulators;
means for comparing the voltage difference with at least one threshold value depending on the measured temperature and current; and
means reporting an error if the voltage difference is greater than or equal to said at least one threshold value,wherein the voltage difference (Δ
V) is compared with a threshold value (Δ
Vs2) defined as
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Accused Products
Abstract
The invention is a monitoring system for a battery having a plurality of accumulators. The system comprises apparatus for measuring the voltage on the terminals of each accumulator; measuring the temperature of the battery; measuring the current flowing through the battery, calculating a voltage difference between a maximum voltage measured on the terminals of one of the accumulators and a minimum voltage measured on the terminals of one of the accumulators; comparing the voltage difference with at least one threshold value depending on the measured temperature and current, and reporting an error if the voltage difference is greater than or equal to the at least one threshold value.
24 Citations
13 Claims
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1. A monitoring system for a battery having a plurality of accumulators, the system comprising:
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means for measuring the voltage at the terminals of each accumulator; means for measuring the temperature of the battery; means for measuring the current flowing through the battery; means for calculating a voltage difference between a maximum voltage measured on the terminals of one of the accumulators and a minimum voltage measured on the terminals of one of the accumulators; means for comparing the voltage difference with at least one threshold value depending on the measured temperature and current; and means reporting an error if the voltage difference is greater than or equal to said at least one threshold value, wherein the voltage difference (Δ
V) is compared with a threshold value (Δ
Vs2) defined as - View Dependent Claims (2, 3, 4, 5, 6)
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7. A supervision system for a battery comprising:
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a monitoring system comprising; means for measuring the voltage at the terminals of each accumulator; means for measuring the temperature of the battery; means for measuring the current flowing through the battery; means for calculating a voltage difference between a maximum voltage measured on the terminals of one of the accumulators and a minimum voltage measured on the terminals of one of the accumulators; means for comparing the voltage difference with at least one threshold value depending on the measured temperature and current; and means reporting an error if the voltage difference is greater than or equal to said at least one threshold value, the supervision system further comprising; means for determining the state of charge of the battery, wherein the voltage difference (Δ
V) is compared with a threshold value (Δ
Vs2) defined as - View Dependent Claims (8, 11)
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9. The supervision system for a battery comprising:
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a monitoring system comprising; means for measuring the voltage at the terminals of each accumulator; means for measuring the temperature of the battery; means for measuring the current flowing through the battery; means for calculating a voltage difference between a maximum voltage measured on the terminals of one of the accumulators and a minimum voltage measured on the terminals of one of the accumulators; means for comparing the voltage difference with at least one threshold value depending on the measured temperature and current; and means reporting an error if the voltage difference is greater than or equal to said at least one threshold value, the supervision system further comprising; means for determining the state of health of the battery from a predictive model, wherein if the voltage difference is greater than at least one threshold value, the error reporting means indicate that the predictive model for determining the state of health is invalid, wherein the voltage difference (Δ
V) is compared with threshold value (Δ
Vs2) defined as - View Dependent Claims (12)
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10. The supervision system for a battery comprising:
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a monitoring system comprising; means for measuring the voltage at the terminals of each accumulator; means for measuring the temperature of the battery; means for measuring the current flowing through the battery; means for calculating a voltage difference between a maximum voltage measured on the terminals of one of the accumulators and a minimum voltage measured on the terminals of one of the accumulators; means for comparing the voltage difference with at least one threshold value depending on the measured temperature when the current of the battery is substantially zero; and means reporting an error if the voltage difference is greater than or equal to said at least one threshold value, the supervision system further comprising; a system for balancing the charge of the accumulators of the battery, wherein the voltage difference (Δ
V) is compared with a threshold value (Δ
Vs2) defined as - View Dependent Claims (13)
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Specification