System and method for sensing battery capacity
First Claim
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1. A battery sense system comprising:
- a temperature sensor configured to measure a temperature of a battery;
a memory configured to store predetermined data associated with steady-state and transient behaviors of the battery relative to a depth of discharge (DOD) of the battery; and
a controller configured to;
measure a voltage of the batterycalculate a current generated by the battery based on the voltage and the measured temperature; and
calculate a state of charge (SOC) of the battery based on the calculated current and the predetermined data,wherein the steady-state behavior of the battery is modeled by a first RC network configured as a first resistor and a first capacitor coupled in series; and
wherein the transient behavior of the battery is modeled by a second RC network configured as a second resistor and a second capacitor coupled in parallel.
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Abstract
One embodiment of the invention includes a battery sense system. The system includes a temperature sensor configured to measure a temperature of a battery and a memory configured to store predetermined data associated with steady-state and transient behaviors of the battery relative to a depth of discharge (DOD) of the battery. The system also includes a controller configured to measure a voltage of the battery and to calculate a state of charge (SOC) of the battery based on the voltage, the predetermined data, and the temperature.
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10 Claims
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1. A battery sense system comprising:
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a temperature sensor configured to measure a temperature of a battery; a memory configured to store predetermined data associated with steady-state and transient behaviors of the battery relative to a depth of discharge (DOD) of the battery; and a controller configured to; measure a voltage of the battery calculate a current generated by the battery based on the voltage and the measured temperature; and calculate a state of charge (SOC) of the battery based on the calculated current and the predetermined data, wherein the steady-state behavior of the battery is modeled by a first RC network configured as a first resistor and a first capacitor coupled in series; and wherein the transient behavior of the battery is modeled by a second RC network configured as a second resistor and a second capacitor coupled in parallel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification