Vehicle energy management

1. A computer, comprising a processor and memory storing instructions executable by the processor, the instructions comprising, to:

receive sensor data from a temperature sensor;

using the sensor data, determine whether a temperature is less than a threshold; and

when the temperature is not less than the threshold, isolate from a starter, during a vehicle ignition event, a first of a plurality of power sources in a vehicle battery and provide via at least one other of the plurality, power to the starter, wherein the first of the plurality comprises lithium-type cells.

2. The computer of claim 1 , wherein the battery comprises the sensor.

3. The computer of claim 1 , wherein the battery comprises three different power sources coupled in parallel.

4. The computer of claim 3 , wherein the three power sources include lithium-type cells, lead-acid-type cells, and ultracapacitor-type cells carried by an H7-sized container.

5. The computer of claim 1 , wherein the battery comprises a switch, wherein the instructions further comprise, to: actuate the switch to a first position based on a cold-start condition; and actuate the switch to a second position based on a warm-start condition.

6. The computer of claim 5 , wherein, in the second position, at least one of the plurality of power sources is coupled to the starter during the ignition event.

7. The computer of claim 5 , wherein, in the second position, at least the first of the plurality is isolated from the starter during the ignition event.

8. A computer comprising a processor and memory storing instructions executable by the processor, the instructions comprising, to:

control, based on a temperature, which of a plurality of different power sources of a vehicle battery are coupled to a starter circuit during a vehicle ignition event, the plurality of different power sources packaged within an H7-sized vehicle battery container.

9. The computer of claim 8 , wherein the instructions further comprise, to: prior to controlling which of the plurality of different power sources are coupled to the starter circuit, receive sensor data from a temperature sensor.

10. The computer of claim 9 , wherein the battery comprises the temperature sensor.

11. The computer of claim 8 , wherein the battery comprises three different power sources coupled in parallel.

12. The computer of claim 11 , wherein a first power source comprises lithium-type cells, a second power source comprises lead-acid-type cells, and a third power source comprises ultracapacitor-type cells.

13. The computer of claim 12 , wherein each of the lithium-type cells, the lead-acid-type cells, and the ultracapacitor-type cells are carried by an H7-sized container.

14. The computer of claim 8 , wherein the battery further comprises an isolation circuit comprising at least one switch, wherein the instructions further comprise, to: control the at least one switch.

15. The computer of claim 14 , wherein the instructions further comprise, to: actuate the at least one switch to a first position based on a cold-start condition; and actuate the at least one switch to a second position based on a warm-start condition.

16. The computer of claim 15 , wherein, in the first position, at least three of the plurality of different power sources are coupled to the starter circuit during the ignition event.

17. The computer of claim 16 , wherein the ignition event changes an engine state to ON.

18. The computer of claim 15 , wherein, in the second position, at least one of the plurality of different power sources is coupled to the starter circuit during the ignition event.

19. The computer of claim 15 , wherein, in the second position, at least one of the plurality of different power sources is isolated from the starter circuit during the ignition event.

20. The computer of claim 8 , wherein the vehicle event is associated with a STOP-START mode in a vehicle.