SYSTEMS AND METHODS FOR DETERMINING THE STATE OF CHARGE OF A BATTERY UTILIZING CONFIDENCE VALUES
First Claim
Patent Images
1. A method for determining a state of charge of a vehicle battery comprising:
- receiving, at a processor, sensor data indicative of a voltage, current, and temperature of the battery;
determining a first state of charge value using a voltage-based strategy on the sensor data;
calculating a first confidence value for the first state of charge value;
determining a second state of charge value using a current-based strategy on the sensor data;
calculating a second confidence value for the second state of charge value;
comparing the first confidence value and second confidence value;
selecting between the first state of charge value and the second state of charge value based on the comparison; and
storing the selected state of charge value in a memory as an overall state of charge value.
3 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods to determine a state of charge (SOC) of a battery using confidence values. SOC estimations are determined using a voltage-based estimation strategy and a current-based estimation strategy. Confidence values are also generated for the voltage-based SOC estimation and the current-based SOC estimation to quantify the amount of uncertainty associated with the SOC estimations. An overall SOC estimation is determined by comparing the confidence values and selecting the SOC estimation having the least amount of uncertainty.
-
Citations
20 Claims
-
1. A method for determining a state of charge of a vehicle battery comprising:
-
receiving, at a processor, sensor data indicative of a voltage, current, and temperature of the battery; determining a first state of charge value using a voltage-based strategy on the sensor data; calculating a first confidence value for the first state of charge value; determining a second state of charge value using a current-based strategy on the sensor data; calculating a second confidence value for the second state of charge value; comparing the first confidence value and second confidence value; selecting between the first state of charge value and the second state of charge value based on the comparison; and storing the selected state of charge value in a memory as an overall state of charge value. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A system for determining a state of charge of a vehicle battery comprising:
-
an interface configured to receive sensor data from a voltage sensor, a current sensor, and a temperature sensor connected to the battery; a voltage-based state of charge generator configured to generate a first state of charge value using a voltage-based strategy on the sensor data; a voltage-based confidence value generator configured to calculate a first confidence value for the first state of charge value; a current-based state of charge generator configured to generate a second state of charge value using a current-accumulation strategy on the sensor data; a current-based confidence value generator configured to calculate a second confidence value for the second state of charge value; a confidence value evaluator configured to compare the first confidence value and second confidence value, and a state of charge storage configured to store the first or the second state of charge value as an overall state of charge value, based on the comparison. - View Dependent Claims (8, 9, 10, 11, 12, 13)
-
-
14. A system for determining a state of charge of a vehicle battery comprising:
-
a vehicle battery; a temperature sensor configured to measure a temperature of the battery; a current sensor configured to measure a current of the battery; a voltage sensor configured to measure a voltage of the battery; a memory storing one or more state of charge values for the battery; and a processor coupled to the memory and configured to; receive sensor data from the sensors indicative of a voltage, current, and temperature of the battery; determine a first state of charge value using a voltage-based strategy on the sensor data; calculate a first confidence value for the first state of charge value; determine a second state of charge value using a current-based strategy on the sensor data; calculate a second confidence value for the second state of charge value; compare the first confidence value and second confidence value; select between the first state of charge value and the second state of charge value based on the comparison; and store the selected state of charge value in the memory as an overall state of charge value. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
Specification