In-vehicle battery monitor
First Claim
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1. A battery monitor for monitoring a battery of an automotive vehicle comprises:
- first and second Kelvin connectors configured to electrically couple to the storage battery;
a processor electrically coupled to the first and second Kelvin connectors and configured to calculate a Reserve State of Health (RSOH) and a Cranking State of Health (CSOH) of the battery and responsively determine a State of Life (SOL) of the battery as a function of the RSOH and CSOH.
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Abstract
An apparatus and a method of monitoring a battery in an automotive vehicle are provided. An output is provided which can be a relative output as a function of minimum and maximum parameters of the battery.
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Citations
42 Claims
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1. A battery monitor for monitoring a battery of an automotive vehicle comprises:
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first and second Kelvin connectors configured to electrically couple to the storage battery;
a processor electrically coupled to the first and second Kelvin connectors and configured to calculate a Reserve State of Health (RSOH) and a Cranking State of Health (CSOH) of the battery and responsively determine a State of Life (SOL) of the battery as a function of the RSOH and CSOH. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A battery monitor for use in monitoring a battery of an automotive vehicle comprising:
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a voltage sensor configured to monitor a voltage across the battery;
a current sensor configured to monitor an electrical current through the battery;
a processor configured to measure a parameter of the battery with the current sensor and the voltage sensor, compare the measured parameter with a historical parameter and identify replacement of the battery based upon the comparison. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A battery monitor for monitoring a battery of an automotive vehicle, comprising:
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a voltage sensor configured to monitor a voltage across the battery;
a current sensor configured to monitor an electrical current through the battery;
an analog to digital converter configured to convert sensed current from the current sensor to a digital value;
a constant offset configured to reduce a quiescent current draw from the sensed current prior to digitizing the sensed current by the analog to digital converter; and
a processor configured to measure a parameter of the battery as a function of sensed current and sensed voltage. - View Dependent Claims (34, 35, 36, 37, 38, 39)
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40. A battery monitor for monitoring a battery of an automotive vehicle, comprising:
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a current sensor configured to monitor an electrical current through the battery;
a communication link configured to couple to a data bus of the vehicle; and
a processor configured to receive a signal from the data bus indicative of operation of an electrical component of the vehicle and responsively wake up from a sleep mode to monitor the electrical current through the battery using the current sensor. - View Dependent Claims (41, 42)
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Specification