Battery healty monitor
First Claim
1. A battery health monitor for monitoring one or more electrical parameters of a battery, the battery including first and second terminals of opposite polarity and configured to produce a direct current (dc) operating voltage at the first terminal, comprising:
- a current sink coupled to the first terminal and configured to sink therefrom an oscillatory current so as to cause the battery to produce at the first terminal an oscillatory voltage equal to or less than the dc operating voltage that would be present at the first terminal in the absence of the oscillatory current; and
a voltage sensor configured to sense the oscillatory voltage at the first terminal.
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Accused Products
Abstract
A battery health monitor (BHM) that operates as a battery-mountable full-spectrum alternating current (ac) impedance meter that facilitates monitoring a state-of-charge and a state-of-health of a battery. The BHM is used for monitoring one or more electrical parameters, e.g., impedance, of a battery. The BHM includes: a current sink coupled to the first terminal and configured to sink therefrom an oscillatory current so as to cause the battery to produce at a first terminal thereof an oscillatory voltage equal to or less than a dc operating voltage of the battery that would be present at the first terminal in the absence of the oscillatory current; and a voltage sensor configured to sense the oscillatory voltage at the first terminal.
132 Citations
37 Claims
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1. A battery health monitor for monitoring one or more electrical parameters of a battery, the battery including first and second terminals of opposite polarity and configured to produce a direct current (dc) operating voltage at the first terminal, comprising:
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a current sink coupled to the first terminal and configured to sink therefrom an oscillatory current so as to cause the battery to produce at the first terminal an oscillatory voltage equal to or less than the dc operating voltage that would be present at the first terminal in the absence of the oscillatory current; and
a voltage sensor configured to sense the oscillatory voltage at the first terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A battery health monitor for monitoring a battery, the battery including first and second terminals of opposite polarity and configured to produce a direct current (dc) operating voltage at the first terminal, comprising:
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a printed circuit board (PCB);
control circuitry constructed on the PCB;
a current sink constructed on the PCB and coupled to the control circuitry and the first terminal, wherein the control circuitry causes the current sink to sink from the first terminal an oscillatory current that causes the battery to produce at the first terminal an oscillatory voltage equal to or less than the dc operating voltage that would be present at the first terminal in the absence of the oscillatory current;
a voltage sensor constructed on the PCB and configured to sense the oscillatory voltage at the first terminal;
a transmitter, constructed on the PCB and coupled to the voltage sensor, configured to transmit a signal indicative of the sensed voltage; and
a housing configured and arranged to enclose the PCB at least partially, the control circuitry, the current sink, the voltage sensor and the transmitter. - View Dependent Claims (22, 23, 24, 25)
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26. A battery health monitor for monitoring a battery, the battery including first and second terminals of opposite polarity and configured to produce a direct current (dc) operating voltage at the first terminal, comprising:
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a printed circuit board (PCB);
control circuitry constructed on the PCB;
a current sink constructed on the PCB and coupled to the control circuitry and the first terminal, wherein the control circuitry causes the current sink to sink from the first terminal an oscillatory current that causes the battery to produce at the first terminal an oscillatory voltage equal to or less than the dc operating voltage that would be present at the first terminal in the absence of the oscillatory current;
a voltage sensor constructed on the PCB and configured to sense the oscillatory voltage at the first terminal;
a housing configured and arranged to enclose the PCB at least partially, the control circuitry, the current sink, the voltage sensor and the transmitter. - View Dependent Claims (27)
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28. A method of monitoring one or more electrical parameters of a battery having first and second terminals of opposite polarity and configured to produce a direct current (dc) operating voltage at the first terminal, comprising:
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sinking, from the first terminal, an oscillatory current so as to cause the battery to produce at the first terminal an oscillatory voltage equal to or less than the dc operating voltage that would be present at the first terminal in the absence of the oscillatory current; and
sensing the oscillatory voltage at the first terminal. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification