Voltage based zero configuration battery management
AssigneeTexas Instruments Incorporated
InventorsGithin Karippumannil Prasad, Yevgen Pavlovich Barsukov, Dale Allen Blackwell
Life of this patent
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Abstract
Controllers and methods to manage a battery, in which a controller estimates scale factor and a steady state current rate according to multiple battery voltage values and a steady state model during steady state operation, and estimates the current rate according to a battery voltage value, the scale factor, and a dynamic model of the battery during dynamic operation, and the controller estimates a remaining capacity of the battery according to the current rate, without requiring controller reconfiguration for different batteries.
Claims23
A controller for use in a battery management system having a battery, the controller comprising:
- a memory storing a set of instructions;
- and
- a processor, upon retrieving and implementing the instructions stored in the memory, configured to:
- estimate a current rate, when the battery is in a steady state mode, according to:
- a first battery voltage sample that represents a battery voltage of the battery at a first sample time, a second battery voltage sample that represents the battery voltage at a second sample time, a temperature sample that represents a temperature of the battery at the first sample time, and a steady state model of the battery;
- estimate a scale factor, when the battery is in the steady state mode, the scale factor representing a deviation in a normalized resistance of the battery according to the first battery voltage sample;
- estimate the current rate, when the battery is in a dynamic mode, according to:
- a voltage value, the temperature sample, the scale factor, and a dynamic model of the battery;
- and
- estimate a remaining capacity of the battery according to the current rate.
A method of managing a battery, the method comprising:
- when a battery is operating in a steady state mode, estimating, by a controller, a current rate according to a first battery voltage sample that represents a battery voltage of the battery at a first sample time, a second battery voltage sample that represents the battery voltage at a second sample time, a temperature sample that represents a temperature of the battery at the first sample time, and a steady state model of the battery;
- in response to determining, by the controller, that the battery is operating in the steady state mode, estimating, by the controller, a scale factor that represents a deviation in a normalized resistance of the battery according to the first battery voltage sample;
- in response to determining, by the controller, that the battery is operating in a dynamic mode, estimating, by the controller, the current rate according to the first battery voltage sample, the temperature sample, the scale factor, and a dynamic model of the battery;
- and
- estimating, by the controller, a remaining capacity of the battery according to the current rate.
A battery management system, comprising:
- a battery;
- and
- a controller, comprising:
- a memory storing a set of instructions;
- and
- a processor, upon retrieving and implementing the instructions stored in the memory, configured to:
- estimate a current rate, when the battery is in a steady state mode, according to:
- a first battery voltage sample that represents a battery voltage of the battery at a first sample time, a second battery voltage sample that represent the battery voltage at a second sample time, a temperature sample that represents a temperature of the battery at the first sample time, and a steady state model of the battery;
- estimate a scale factor, when the battery is in the steady state mode, the scale factor representing a deviation in a normalized resistance of the battery according to the first battery voltage sample;
- estimate the current rate, when the battery is in a dynamic mode, according to:
- the first battery voltage sample, the temperature sample, the scale factor, and a dynamic model of the battery;
- and
- estimate a remaining capacity of the battery according to the current rate.
Dependencies are inferred from the claim text.