Current sensor for a vehicle
First Claim
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1. A vehicle comprising:
- a battery configured to operate at a current, during a drive cycle, in a nominal current range for a time greater than in a maximum current range; and
a controller programmed to change an output voltage, in response to a change in the current, by a greater amount when the current is in the nominal current range than when the current is in the maximum current range.
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Abstract
A vehicle includes a battery configured to operate at a current, during a drive cycle, in a nominal current range for a time greater than in a maximum current range. A controller is programmed to output a voltage based on the current according to a gain calibrated to be greater in the nominal current range than in the maximum current range to increase resolution in the nominal current range. The gain may be based on an exponential function or piecewise linear function of the current. The gain may increase as a magnitude of the current increases. A second controller receives the voltage and derives a battery current according to an inverse of the gain.
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Citations
20 Claims
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1. A vehicle comprising:
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a battery configured to operate at a current, during a drive cycle, in a nominal current range for a time greater than in a maximum current range; and a controller programmed to change an output voltage, in response to a change in the current, by a greater amount when the current is in the nominal current range than when the current is in the maximum current range. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A battery management system comprising:
a controller programmed to measure a current from a battery configured to operate, during a drive cycle, at the current in a nominal current range for a time greater than in a maximum current range, and change a voltage, in response to a change in the current, by a greater amount when the current is in the nominal current range than when the current is in the maximum current range. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method comprising:
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measuring, by a controller, a current from a battery configured to operate at the current in a nominal current range for a time greater than in a maximum current range; and changing, by the controller, an output voltage, in response to a change in the current, by a greater amount when the current is in the nominal current range than when the current is in the maximum current range. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification