Variable wakeup of a high-voltage charger based on low-voltage system parameters
A method of operating a vehicular system includes charging, by a controller and via an electric vehicle charge station, a low-voltage battery when a module powered by the low-voltage battery is awake and an SOC of the low-voltage battery is less than a threshold; and in response to the SOC exceeding the threshold, commanding by the controller the module to enter a sleep mode for a sleep duration defined by a power usage of the module such that as the power usage changes, the sleep duration changes.
1. A vehicle method comprising:
by a controller,
charging via an electric vehicle charge station a low-voltage battery when a module, powered by the low-voltage battery, is awake; and
in response to an SOC of the low-voltage battery exceeding a threshold, commanding the module to enter a sleep mode for a duration defined by an average power draw of the module while awake.
2. The method of claim 1 , wherein the duration increases as the average current draw of the module increases.
3. The method of claim 1 , wherein the duration is further defined by a profile of a current of the low-voltage battery indicative of a customer driving habit that includes electronic power steering usage, air conditioning usage, and seat heater usage.
4. The method of claim 1 further including adjusting the duration based on a battery parameter.
5. The method of claim 4 , wherein the battery parameter is a temperature, an age, or a capacity of the low-voltage battery.
6. The method of claim 4 , wherein the battery parameter is a self-discharge rate or an internal impedance of the low-voltage battery.
7. A vehicle comprising:
a module powered by a low-voltage battery; and
a controller configured to, while coupled with a charge station, route current to the low-voltage battery after expiration of a time period that has a duration defined by a change in current of the low-voltage battery associated with operation of the module and a parameter associated with the low-voltage battery.
8. The vehicle of claim 7 , wherein the parameter is a temperature, an age, or a capacity of the low-voltage battery.
9. The vehicle of claim 8 , wherein the duration decreases as the temperature of the low-voltage battery increases.
10. The vehicle of claim 7 , wherein the parameter is a self-discharge rate or an internal impedance of the low-voltage battery.
11. The vehicle of claim 10 , wherein the duration decreases as the internal impedance increases.
12. The vehicle of claim 7 , wherein the duration is further defined by a profile of a current of the low-voltage battery indicative of a customer driving habit that includes a desired interior temperature of the vehicle, and seat heater usage.
13. A vehicle comprising:
a controller configured to, while coupled with a charge station, route current from the charge station to a low-voltage battery in response to (i) an SOC of the low-voltage battery being below a threshold and (ii) an expiration of a sleep duration that is defined by a change in current of the low-voltage battery and a parameter associated with the low-voltage battery.
14. The vehicle of claim 13 , wherein the parameter is a capacity of the low-voltage battery.
15. The vehicle of claim 13 , wherein the parameter is an internal impedance of the low-voltage battery.
16. The vehicle of claim 13 , wherein the sleep duration is further defined by a profile of a current of the low-voltage battery indicative of a customer driving habit that includes a desired temperature of an interior of the vehicle, and seat heater usage.
17. The vehicle of claim 16 , wherein the parameter is a temperature, an age, or a capacity of the low-voltage battery.
18. The vehicle of claim 16 , wherein the parameter is a self-discharge rate or an internal impedance of the low-voltage battery.
19. The vehicle of claim 13 , wherein the sleep duration decreases as the low-voltage battery current increases.