System for determining battery impedance
First Claim
1. A method for real-time characterization of a battery in a power system, the method comprising:
- between startup and shutdown of the power system, operating the power system by;
providing electric power to one or more electrical power loads of the power system,charging and discharging the battery based on power needs of the one or more electrical power loads,with at least one information-processing device, monitoring for a circumstance where the charging and discharging of the battery based on the power needs of the one or more electrical power loads results in a measured terminal voltage of the battery substantially equaling an open-circuit voltage of the battery and recording the measured terminal voltage as a first measured voltage,with the at least one information-processing device, monitoring for a circumstance subsequent to the measured terminal voltage substantially equaling the open-circuit voltage when charging and discharging the battery based on the power needs of the electrical power loads results in a battery current larger than a predetermined value and recording an existing terminal voltage as a second measured voltage, andwith the at least one information-processing device, using the battery current larger than a predetermined value, the first measured voltage and the second measured voltage to determine an internal impedance of the battery, wherein the internal impedance of the battery is equal to the difference between the first measured voltage and the second measured voltage divided by the battery current larger than a predetermined value.
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Accused Products
Abstract
A method for real-time characterization of a battery includes providing electric power to one or more electrical power loads, charging and discharging the battery based on power needs of the one or more electrical power loads, and monitoring for a circumstance where charging and discharging of the battery results in terminal voltage of the battery substantially equaling open-circuit voltage of the battery and recording the measured terminal voltage as a first measured voltage. The method may also include monitoring for a subsequent circumstance subsequent when charging and discharging the battery results in battery current larger than a predetermined value and recording an existing terminal voltage as a second measured voltage. The method may also include using the first and second measured voltages to determine a measured internal impedance of the battery. These actions may be performed between startup and shutdown of the power system.
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Citations
10 Claims
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1. A method for real-time characterization of a battery in a power system, the method comprising:
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between startup and shutdown of the power system, operating the power system by; providing electric power to one or more electrical power loads of the power system, charging and discharging the battery based on power needs of the one or more electrical power loads, with at least one information-processing device, monitoring for a circumstance where the charging and discharging of the battery based on the power needs of the one or more electrical power loads results in a measured terminal voltage of the battery substantially equaling an open-circuit voltage of the battery and recording the measured terminal voltage as a first measured voltage, with the at least one information-processing device, monitoring for a circumstance subsequent to the measured terminal voltage substantially equaling the open-circuit voltage when charging and discharging the battery based on the power needs of the electrical power loads results in a battery current larger than a predetermined value and recording an existing terminal voltage as a second measured voltage, and with the at least one information-processing device, using the battery current larger than a predetermined value, the first measured voltage and the second measured voltage to determine an internal impedance of the battery, wherein the internal impedance of the battery is equal to the difference between the first measured voltage and the second measured voltage divided by the battery current larger than a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification