Desired departure temperature for a battery in a vehicle

1. A system, comprising:

a processor; and

a memory coupled with the processor, wherein the memory is configured to provide the processor with instructions which when executed cause the processor to:

determine a desired departure temperature for a battery, having a temperature, in a vehicle based at least in part on trip information associated with a trip, wherein determining the desired departure temperature includes:

determining a change in battery temperature associated with the trip using the trip information and an estimation function that inputs the trip information, wherein the trip information includes a trip duration or a trip plan; and

determining the desired departure temperature using the change in battery temperature associated with the trip and a desired battery temperature range; and

use a temperature controlling system to bring the temperature of the battery towards the desired departure temperature, wherein the vehicle begins the trip with the battery at the desired departure temperature.

2. The system recited in claim 1 , wherein determining the desired departure temperature is further based at least in part on one or more of the following: state of health information associated with the battery, an average cell internal resistance, a minimum cell capacity, or ambient temperature.

3. The system recited in claim 1 , wherein determining the desired departure temperature further includes:

generating, for each of a plurality of test departure temperatures, a plurality of modeled battery data using a battery model associated with the battery;

evaluating each of the plurality of modeled battery data using a cost function in order to obtain an evaluated cost function wherein the cost function takes into account at least battery performance and battery degradation; and

outputting that test departure temperature from the plurality of test departure temperatures which corresponds to a minimum of the evaluated cost function as the desired departure temperature.

4. The system recited in claim 1 , wherein:

the trip information includes a departure time;

the memory is further configured to provide the processor with instructions which when executed cause the processor to: determine a start time to start the temperature controlling system based at least in part on the departure time and the desired departure temperature; and

the temperature controlling system is started at the start time.

5. A method, comprising:

determining a desired departure temperature for a battery, having a temperature, in a vehicle based at least in part on trip information associated with a trip, wherein determining the desired departure temperature includes:

determining a change in battery temperature associated with the trip using the trip information and an estimation function that inputs the trip information, wherein the trip information includes a trip duration or a trip plan; and

determining the desired departure temperature using the change in battery temperature associated with the trip and a desired battery temperature range; and

using a temperature controlling system to bring the temperature of the battery towards the desired departure temperature, wherein the vehicle begins the trip with the battery at the desired departure temperature.

6. The method recited in claim 5 , wherein determining the desired departure temperature is further based at least in part on one or more of the following: state of health information associated with the battery, an average cell internal resistance, a minimum cell capacity, or ambient temperature.

7. The method recited in claim 5 , wherein determining the desired departure temperature further includes:

generating, for each of a plurality of test departure temperatures, a plurality of modeled battery data using a battery model associated with the battery;

evaluating each of the plurality of modeled battery data using a cost function in order to obtain an evaluated cost function wherein the cost function takes into account at least battery performance and battery degradation; and

outputting that test departure temperature from the plurality of test departure temperatures which corresponds to a minimum of the evaluated cost function as the desired departure temperature.

8. The method recited in claim 5 , wherein:

the trip information includes a departure time;

the method further includes: determining a start time to start the temperature controlling system based at least in part on the departure time and the desired departure temperature; and

the temperature controlling system is started at the start time.

9. A computer program product, the computer program product being embodied in a non-transitory computer readable storage medium and comprising computer instructions for:

determining a desired departure temperature for a battery, having a temperature, in a vehicle based at least in part on trip information associated with a trip, wherein determining the desired departure temperature includes:

determining a change in battery temperature associated with the trip using the trip information and an estimation function that inputs the trip information, wherein the trip information includes a trip duration or a trip plan; and

determining the desired departure temperature using the change in battery temperature associated with the trip and a desired battery temperature range; and

using a temperature controlling system to bring the temperature of the battery towards the desired departure temperature, wherein the vehicle begins the trip with the battery at the desired departure temperature.

10. The computer program product recited in claim 9 , wherein determining the desired departure temperature is further based at least in part on one or more of the following: state of health information associated with the battery, an average cell internal resistance, a minimum cell capacity, or ambient temperature.

11. The computer program product recited in claim 9 , wherein determining the desired departure temperature further includes:

generating, for each of a plurality of test departure temperatures, a plurality of modeled battery data using a battery model associated with the battery;

evaluating each of the plurality of modeled battery data using a cost function in order to obtain an evaluated cost function wherein the cost function takes into account at least battery performance and battery degradation; and

outputting that test departure temperature from the plurality of test departure temperatures which corresponds to a minimum of the evaluated cost function as the desired departure temperature.

12. The computer program product recited in claim 9 , wherein:

the trip information includes a departure time;

the computer program product further includes computer instructions for: determining a start time to start the temperature controlling system based at least in part on the departure time and the desired departure temperature; and

the temperature controlling system is started at the start time.

13. A system, comprising:

a processor; and

a memory coupled with the processor, wherein the memory is configured to provide the processor with instructions which when executed cause the processor to:

determine a desired departure temperature for a battery, having a temperature, in a vehicle based at least in part on trip information associated with a trip, wherein determining the desired departure temperature includes:

generating, for each of a plurality of test departure temperatures, a plurality of modeled battery data using a battery model associated with the battery;

evaluating each of the plurality of modeled battery data using a cost function in order to obtain an evaluated cost function wherein the cost function takes into account at least battery performance and battery degradation; and

outputting that test departure temperature from the plurality of test departure temperatures which corresponds to a minimum of the evaluated cost function as the desired departure temperature; and

use a temperature controlling system to bring the temperature of the battery towards the desired departure temperature, wherein the vehicle begins the trip with the battery at the desired departure temperature.

14. The system recited in claim 13 , wherein the trip information includes one or more of a trip duration, a destination, a trip distance, or a trip plan.

15. The system recited in claim 13 , wherein determining the desired departure temperature is further based at least in part on one or more of the following: state of health information associated with the battery, an average cell internal resistance, a minimum cell capacity, or ambient temperature.

16. A method, comprising:

determining a desired departure temperature for a battery, having a temperature, in a vehicle based at least in part on trip information associated with a trip, wherein determining the desired departure temperature includes:

generating, for each of a plurality of test departure temperatures, a plurality of modeled battery data using a battery model associated with the battery;

evaluating each of the plurality of modeled battery data using a cost function in order to obtain an evaluated cost function wherein the cost function takes into account at least battery performance and battery degradation; and

outputting that test departure temperature from the plurality of test departure temperatures which corresponds to a minimum of the evaluated cost function as the desired departure temperature; and

using a temperature controlling system to bring the temperature of the battery towards the desired departure temperature, wherein the vehicle begins the trip with the battery at the desired departure temperature.

17. The method recited in claim 16 , wherein the trip information includes one or more of a trip duration, a destination, a trip distance, or a trip plan.

18. The method recited in claim 16 , wherein determining the desired departure temperature is further based at least in part on one or more of the following: state of health information associated with the battery, an average cell internal resistance, a minimum cell capacity, or ambient temperature.