State-of-charge detection device for a battery
First Claim
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1. A method of improving estimation of battery impedance for determining the state of charge of a battery comprising:
- injecting an electrical signal across said battery when said battery is in discharge mode; and
providing a powertrain controller including;
a power inverter coupled to said battery;
a controller controlling said power inverter, said controller monitoring the state of charge of said battery; and
a state of charge algorithm included in said controller, wherein said step of injecting an electrical signal is performed by said controller for providing accurate criteria to said state of charge algorithm.
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Abstract
A method and apparatus for improving estimation of battery impedance when determining the state of charge of a battery including injecting a wide spectrum signal continuously across a battery when the battery is in generator mode. Additionally, the wide spectrum signal may be injected across an alternator of a conventional internal combustion engine to improve estimation of battery impedance and subsequent state of charge the battery.
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Citations
28 Claims
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1. A method of improving estimation of battery impedance for determining the state of charge of a battery comprising:
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injecting an electrical signal across said battery when said battery is in discharge mode; and
providing a powertrain controller including;
a power inverter coupled to said battery;
a controller controlling said power inverter, said controller monitoring the state of charge of said battery; and
a state of charge algorithm included in said controller, wherein said step of injecting an electrical signal is performed by said controller for providing accurate criteria to said state of charge algorithm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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- 10. A method of improving estimation of battery impedance for determining the state of charge of a battery of an internal combustion engine comprising injecting an electrical signal across an alternator coupled to said engine.
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14. A vehicle powertrain control system comprising:
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a battery pack;
a power inverter coupled to said battery pack;
a controller controlling said power inverter, said controller monitoring the state of charge of said battery pack; and
an electrical signal generated by said controller for implementing said monitoring of the state of charge of said battery pack. - View Dependent Claims (15, 16, 17, 18)
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19. A method of improving estimation of battery impedance for determining the state of charge of a battery of an electronic vehicle comprising injecting an AC electrical signal across said battery, wherein said electronic vehicle further comprises:
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a battery;
a power inverter coupled to said battery; and
a controller controlling said war inverter, said controller monitoring the state of charge of said battery. - View Dependent Claims (20, 21, 22, 23)
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24. A method for improving estimation of battery impedance for determining the state of charge of an electronic apparatus having a battery pack, a power inverter coupled to the battery pack, and a controller controlling the power inverter, comprising the steps of:
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monitoring the state of charge of said battery pack by said controller, and injecting a time varying electrical signal across said battery pack. - View Dependent Claims (25, 26, 27, 28)
charging said battery; and
modulating said charging step by said controller.
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28. The method of claim 24, further comprising modulating the processing speed of said controller and influencing the power draw of said battery pack.
Specification