Electrified vehicle method and system for charging during a non-drive cycle

Patent metadata

Field	Value
Publication number	US-9994120-B2
Application number	US-201514868892-A
Country	US
Kind code	B2
Filing date	Sep 29, 2015
Priority date	Sep 29, 2015
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

An exemplary electrified vehicle charging method includes waking a portion of an electrified vehicle, reading a state of charge for a battery of the electrified vehicle during the waking, charging the battery using an internal combustion engine in response to the reading if the electrified vehicle is in an open space, and disabling the charging if the electrified vehicle is in an enclosed space.

First claim

What is claimed is:

1. An electrified vehicle charging method, comprising:
waking a controller of an electrified vehicle without starting a drive cycle;
reading a state of charge for a battery of the electrified vehicle during the waking;
charging the battery using an internal combustion engine in response to the reading if the electrified vehicle is in an open space;
disabling the charging if the electrified vehicle is in an enclosed space; and
further comprising, during the waking, scheduling a rewake time for the controller based on a time period that the state of charge will remain at or above a level sufficient to crank the internal combustion engine.

2. The method of claim 1 , further comprising waking the electrified vehicle during a non-drive cycle after completing a first drive cycle and prior to starting a second drive cycle.

3. The method of claim 1 , wherein the battery is a traction battery.

4. The method of claim 3 , further comprising using power from the traction battery to charge an accessory battery that powers a starter to crank the internal combustion engine.

5. The method of claim 1 , wherein the charging comprises charging the battery to a state of charge above a threshold state of charge, the threshold state of charge representative of a level of charge sufficient to crank the internal combustion engine.

6. The method of claim 1 , further comprising:
stopping the waking after the charging;
rewaking the portion again after a time period;
rereading a state of charge for the battery during the rewaking; and
recharging the battery in response to the rereading.

7. The method of claim 1 , further comprising altering the charging in response to an amount of fuel available to power the internal combustion engine, the altering including charging the battery to a first state of charge when the amount of fuel is a first amount, and charging the battery to a second state of charge when the amount of fuel is a second amount, the first level greater than the second level, the first amount greater than the second amount.

8. The method of claim 1 , further comprising altering the charging in response to an expected operational mode of the electrified vehicle in a drive cycle.

9. The method of claim 1 , further comprising scheduling the charging to occur after a delay.

10. The method of claim 1 , wherein the battery is a traction battery, and the waking is an aperiodic waking that is in response to a temperature of the traction battery.

11. A charging system of an electrified vehicle, comprising:
a controller configured to cause an internal combustion engine to charge a battery during a non-drive cycle if a state of charge of the battery is below a threshold state of charge and if the electrified vehicle is in an open space rather than an enclosed space, the controller configured to wake from a sleep mode without starting a drive cycle of the electrified vehicle, and
wherein the controller is further configured to, when transitioned from the sleep mode to a wake mode, schedule a rewake time for the controller based on a time period that the state of charge will remain at or above a level sufficient to crank the internal combustion engine.

12. The system of claim 11 , wherein the non-drive cycle occurs after a first drive cycle and before a second drive cycle that is directly subsequent the first drive cycle.

13. The system of claim 11 , wherein the battery is a traction battery.

14. The system of claim 13 , further comprising a convertor, wherein the traction battery is configured to charge an accessory battery through the convertor, the accessory battery configured to power a charger that cranks the internal combustion engine.

15. The system of claim 11 , wherein the controller is further configured to provide an alert if the state of charge of the battery is below the threshold state of charge and if the electrified vehicle is in an enclosed space.

16. The system of claim 11 , wherein the controller is configured to schedule the charge to occur after a delay.

17. The system of claim 11 , wherein the controller is configured to aperiodically wake during the non-drive cycles to read the state of charge of the battery without starting a drive cycle.

18. The system of claim 11 , wherein the electrified vehicle is a hybrid electric vehicle.

Assignees

• Ford Global Tech Llc

Inventors

• Yu Hai
• Li Yonghua

Classifications

• B60L53/62

  in response to charging parameters, e.g. current, voltage or electrical charge · CPC title

• B60W10/08

  including control of electric propulsion units, e.g. motors or generators · CPC title

• B60W10/06

  including control of combustion engines · CPC title

• B60W30/18054

  at stand still, e.g. engine in idling state (hill holding B60W30/18118) · CPC title

• B60W2510/244

  Charge state · CPC title