Method and apparatus for identifying a battery model

1. A method for determining a state of a battery, the method comprising:

acquiring battery information from at least one sensor associated with the battery, the battery information including at least a terminal voltage and a terminal current;

estimating, using processing circuitry, degradation information based on a first principle degradation model and the battery information, the first principle degradation model being a three dimensional model and including a plurality of layers having one or more attributes representative of physical parameters of the battery;

identifying, using the processing circuitry, a circuit model representative of the battery based on the degradation information and the battery information;

determining, using the processing circuitry, the state of the battery using the identified circuit model; and

implementing a control action or a notification based on the determined state of the battery.

2. The method of claim 1 , wherein identifying the circuit model includes selecting a Thevenin circuit model topology from a plurality of topologies.

3. The method of claim 2 , wherein selecting the Thevenin circuit model topology includes matching a degradation level with one of the plurality of topologies using a look-up table.

4. The method of claim 1 , wherein identifying the circuit model includes identifying at least one parameter of a Thevenin circuit model.

5. The method of claim 1 , further comprising:

determining a parameter related to an anode of the battery; and

comparing the determined parameter to a predetermined threshold in order to evaluate another parameter representative of the state of the battery.

6. The method of claim 1 , wherein the plurality of layers of the first principle degradation model includes one or more anode layers, a cathode layer, and an electrolyte layer positioned between the cathode layer and the one or more anode layers.

7. The method of claim 6 , wherein the one or more anode layers include porous electrodes surrounded by electrolyte.

8. The method of claim 1 , wherein the battery is a lithium-ion battery.

9. The method of claim 1 , wherein the state of the battery represents a state of function, a state of health, or a state of charge.

10. The method of claim 1 , wherein the first principle degradation model is a time dependent model.

11. The method of claim 1 , wherein the physical parameters include a battery capacity, an electrode width, and an electrolyte width.

12. A battery system, comprising

a battery;

at least one sensor configured to detect at least a terminal voltage and a terminal current; and

circuitry configured to

acquire battery information from the at least one sensor,

estimate degradation information based on a first principle degradation

model and the battery information, the first principle degradation model being a three dimensional model and including a plurality of layers having one or more attributes representative of physical parameters of the battery,

identify a circuit model representative of the battery based on the degradation information and the battery information,

determine a state of the battery using the identified circuit model, and

implement a control action or a notification based on the determined state of the battery.

13. The system of claim 12 , wherein identifying the circuit model includes selecting a Thevenin circuit model topology from a plurality of topologies.

14. The system of claim 13 , wherein selecting the Thevenin circuit model topology includes matching a degradation level with one of the plurality of topologies using a look-up table.

15. The system of claim 12 , wherein identifying the circuit model includes identifying at least one parameter of a Thevenin circuit model.

16. The system of claim 12 , wherein the circuitry is further configured to:

determine a parameter related to an anode of the battery; and

compare the determined parameter to a predetermined threshold in order to evaluate another parameter representative of the state of the battery.

17. The system of claim 12 , wherein the plurality of layers of the first principle degradation model includes one or more anode layers, a cathode layer, and an electrolyte layer positioned between the cathode layer and the one or more anode layers.

18. The system of claim 17 , wherein the one or more anode layers include porous electrodes surrounded by electrolyte.

19. The system of claim 12 , wherein the state of the battery represents a state of function, a state of health, or a state of charge.

20. An apparatus for determining a state of a battery, the apparatus comprising:

at least one sensor configured to acquire battery information from a battery, the battery information including at least a terminal voltage and a terminal current; and

processing circuitry configured to

estimate degradation information based on a first principle degradation model and the battery information, the first principle degradation model being a three dimensional model and including a plurality of layers having one or more attributes representative of physical parameters of the battery,

identify a circuit model representative of the battery based on the degradation information and the battery information,

determine a state of the battery using the identified circuit model, and

implement a control action or a notification based on the determined state of the battery.