Hybrid vehicle and powertrain

Patent metadata

Field	Value
Publication number	US-10696290-B2
Application number	US-201815906800-A
Country	US
Kind code	B2
Filing date	Feb 27, 2018
Priority date	Feb 27, 2018
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

A vehicle includes a controller that is configured to, while a battery temperature exceeds a threshold and state of charge (SOC) is above an SOC threshold, enable an electric machine to provide torque assistance at a power limit, and responsive to the temperature dropping below the threshold, increase the power limit and enable the electric machine to provide torque assistance while the SOC is above a cold SOC threshold less than the SOC threshold.

First claim

What is claimed is:

1. A vehicle comprising:
a controller configured to,
while a battery temperature exceeds a threshold and state of charge (SOC) is above an SOC threshold, enable an electric machine to provide torque assistance at a power limit, and
responsive to the battery temperature dropping below the threshold, increase the power limit and enable the electric machine to provide torque assistance while the SOC is above a cold SOC threshold that is less than the SOC threshold.

2. The vehicle of claim 1 , wherein the controller is further configured to, responsive to the battery temperature dropping below the threshold increase the power limit based on historical usage data recorded over a period, wherein the historical usage data is indicative of a current flow from the electric machine to the battery and the increase in the power limit is proportional to an increase current flow.

3. The vehicle of claim 2 , wherein the historical usage data is based on a driver profile and the period includes a drive cycle or multiple drive cycles, and the period is further associated with a time of day or a day of the week.

4. The vehicle of claim 3 , wherein the driver profile is based on a selection of a driver seat preset or a signal received from a key fob.

5. The vehicle of claim 1 , wherein the controller is further configured to, responsive to the battery temperature dropping below the threshold increase the power limit based on predicted usage data, such that the predicted usage data is captured over a period, wherein the predicted usage data is indicative of a predicted current flow from the electric machine to the battery and the increase in the power limit is proportional to an increase current flow.

6. The vehicle of claim 5 , wherein the predicted usage data is based on navigation data, route data, weather, or predicted traffic data.

7. The vehicle of claim 6 , wherein the predicted usage data is based on a driver profile that is based on a selection of a driver seat preset or a signal received from a key fob.

8. The vehicle of claim 1 , wherein the controller is further configured to, while a battery temperature exceeds a threshold and state of charge (SOC) is below an SOC alternator threshold, enable an electric machine to charge the battery at an alternator power limit, and responsive to the battery temperature dropping below the threshold, increase the alternator power limit and enable the electric machine to charge the battery while the SOC is below a cold alternator SOC threshold that exceeds the SOC alternator threshold.

9. The vehicle of claim 1 , wherein the battery is a Li-ion battery.

10. The vehicle of claim 1 , wherein the controller is further configured to, divide a torque demand between a motor torque demand and engine torque demand, and responsive to the battery temperature dropping below the threshold, increase the motor torque demand relative to the engine torque demand.

11. The vehicle of claim 1 , wherein the controller is further configured to, responsive to the battery temperature dropping below the threshold, inhibit operation of the electric machine to crank an internal combustion engine.

12. A vehicle comprising:
a controller configured to,
while a battery temperature exceeds a threshold and state of charge (SOC) is below an SOC threshold, enable an electric machine to charge the battery at a power limit, and
responsive to the battery temperature dropping below the threshold, increase the power limit and enable the electric machine to charge the battery while the SOC is below a cold SOC threshold that exceeds the SOC threshold.

13. The vehicle of claim 12 , wherein the controller is further configured to, responsive to the battery temperature dropping below the threshold increase the power limit based on historical usage data recorded over a period, wherein the historical usage data is indicative of a current flow from the battery to the electric machine and the increase in the power limit is proportional to an increase current flow.

14. The vehicle of claim 13 , wherein the historical usage data is based on a driver profile and the period includes a drive cycle or multiple drive cycles, and the time period is further associated with a time of day or a day of the week.

15. The vehicle of claim 14 , wherein the driver profile is based on a selection of a driver seat preset or a signal received from a key fob.

16. A method of operating an electric machine of a vehicle comprising:
while a battery temperature exceeds a threshold and state of charge (SOC) is above an SOC threshold,
enabling an electric machine to provide torque assistance at a power limit, and

responsive to the battery temperature dropping below the threshold,
increasing the power limit, and
enabling the electric machine to provide torque assistance while the SOC is above a cold SOC threshold that is less than the SOC threshold.

17. The method of claim 16 further comprising,
while a battery temperature exceeds a threshold and state of charge (SOC) is below an SOC alternator threshold, enable an electric machine to charge the battery at an alternator power limit, and
responsive to the battery temperature dropping below the threshold, increase the alternator power limit and enable the electric machine to charge the battery while the SOC is above a cold alternator SOC threshold that exceeds the SOC alternator threshold.

18. The method of claim 16 further comprising dividing a torque demand between a motor torque demand and engine torque demand, and responsive to the temperature dropping below the threshold, increasing the motor torque demand relative to the engine torque demand.

19. The method of claim 16 further configured to, responsive to the battery temperature dropping below the threshold, inhibiting operation of the electric machine to crank an internal combustion engine.

20. The method of claim 16 further configured to,
capturing predicted usage data over a period; and
responsive to the battery temperature dropping below the threshold, increasing the power limit based on predicted usage data,
wherein the predicted usage data is indicative of a predicted current flow from the electric machine to the battery and is based on a driver profile and navigation data, route data, weather, or predicted traffic data, and
the increase in the power limit is proportional to an increase current flow.

Assignees

• Ford Global Tech Llc

Inventors

• Chikkannanavar Satish B
• Tan Cheng
• Tao Jonathan
• Alimario Allan
• Callicoat Debborah
• Taenaka Robert K
• Kees Donatus Andreas Josephine

Classifications

• B60W2556/10

  Historical data · CPC title

• B60W2050/0075

  Automatic parameter input, automatic initialising or calibrating means · CPC title

• Y02T10/72

  Electric energy management in electromobility · CPC title

• Y02T10/62

  Hybrid vehicles · CPC title

• B60W10/06 Primary

  including control of combustion engines · CPC title