Battery management system for determining a health of a power source based on an impedance indicator
A method is provided. The method includes determining an open circuit voltage of a battery of a vehicle. The method also includes determining a voltage of a current provided to the battery of the vehicle. The method further includes determining a impedance indicator based on the voltage, the open circuit voltage, and the current provided to the battery of the vehicle. The method further includes determining a health of the battery based on the impedance indicator.
1 . A method, comprising:
determining, by a battery management system included within a vehicle, an open circuit voltage of a battery of the vehicle;
measuring, by the battery management system, a voltage of a current provided to the battery of the vehicle;
determining, by the battery management system, an impedance indicator based on the measured voltage, the open circuit voltage, and the current provided to the battery of the vehicle; and
determining, by the battery management system, a health of the battery based on the impedance indicator.
2 . The method of claim 1 , wherein the impedance indicator represents one or more of a resistance and an impedance of the battery at a state of charge.
3 . The method of claim 1 , wherein determining the voltage comprises: measuring, by a battery management system, the voltage of the current.
4 . The method of claim 1 , wherein the open circuit voltage is determined based on a previous measurement of the battery retrieved from stored historical measurement data of the battery.
5 . The method of claim 1 , further comprising: adjusting the open circuit voltage based on one or more of an amount of time the battery has been in operation, a number of times the battery has been charged, and charging and discharging cycles of the battery.
6 . The method of claim 1 , wherein determining the open circuit voltage comprises: measuring, by a battery management system, the open circuit voltage at one or more terminals of the battery.
7 . The method of claim 1 , wherein determining the impedance indicator comprises:
determining a difference between the measured voltage and the open circuit voltage; and
dividing the difference by the current.
8 . The method of claim 1 , determining the health of the battery comprises:
determining whether the impedance indicator of the battery has increased;
in response to determining that the impedance indicator of the battery has increased, determining that the health of the battery has decreased.
9 . The method of claim 1 , further comprising: requesting adjustments to the current provided to the battery of the vehicle, based on the health of the battery.
10 . The method of claim 1 , further comprising: providing an indication of the health to an interface system.
11 . An apparatus, comprising:
a memory configured to store data; and
a processing device coupled to the memory, the processing device configured to:
determine, by a battery management system included within a vehicle, an open circuit voltage of a battery of the vehicle;
measure, by the battery management system, a voltage of a current provided to the battery of the vehicle;
determine, by the battery management system, an impedance indicator based on the measured voltage, the open circuit voltage, and the current provided to the battery of the vehicle; and
determine, by the battery management system, a health of the battery based on the impedance indicator.
12 . The apparatus of claim 11 , wherein the impedance indicator represents one or more of a resistance and an impedance of the battery at a state of charge.
13 . The apparatus of claim 11 , wherein to determine the voltage the processing devices is further to:
measure, by the battery management system, the voltage of the current.
14 . The apparatus of claim 11 , wherein the open circuit voltage is determined based on a previous measurement of the battery retrieved from stored historical measurement data of the battery.
15 . The apparatus of claim 11 , wherein the processing devices is further to:
adjust the open circuit voltage based on one or more of an amount of time the battery has been in operation, a number of times the battery has been charged, and charging and discharging cycles of the battery.
16 . The apparatus of claim 11 , wherein to determine the open circuit voltage the processing devices is further to:
measure the open circuit voltage at one or more terminals of the battery.
17 . The apparatus of claim 11 , wherein to determine the impedance indicator the processing devices is further to:
determine a difference between the measured voltage and the open circuit voltage; and
divide the difference by the current.
18 . The apparatus of claim 11 , to determine the health of the battery the processing devices is further to:
determine whether the impedance indicator of the battery has increased;
in response to determining that the impedance indicator of the battery has increased, determine that the health of the battery has decreased.
19 . The apparatus of claim 11 , wherein the processing devices is further to:
request adjustments to the current provided to the battery of the vehicle, based on the health of the battery.
20 . A non-transitory computer-readable storage medium including instructions that, when executed by a processing device, cause the processing device to:
determine, by a battery management system included within a vehicle, an open circuit voltage of a battery of the vehicle;
measure, by the battery management system, a voltage of a current provided to the battery of the vehicle;
determine, by the battery management system, an impedance indicator based on the measured voltage, the open circuit voltage, and the current provided to the battery of the vehicle; and
determine, by the battery management system, a health of the battery based on the impedance indicator.