Vehicle battery power transfer limit management system and method
AssigneeFord Global Technologies, LLC
InventorsRajit Johri, Mark Steven Yamazaki, Scott James Thompson, Chen Zhang
Life of this patent
Estimating the term…
Abstract
A vehicle includes a powertrain including an electric machine and a traction battery. The vehicle also includes at least one controller programmed to, during a transmission shift event, cause the electric machine to absorb torque. The torque absorption causes current generated by the electric machine to charge the battery according to a predetermined power transfer schedule defining a charge limit. The controller is further programmed to permit the current to exceed the charge limit for a predetermined duration of time in certain instances.
Claims16
A vehicle comprising:
- a powertrain including an electric machine;
- a traction battery;
- and
- at least one controller configured to, during a transmission shift event, cause the electric machine to absorb torque, cause current generated by the electric machine to charge the battery according to a predetermined power transfer schedule defining a charge limit, and permit the current to exceed the charge limit for a predetermined duration of time.
A vehicle comprising:
- an electric machine;
- a traction battery;
- and
- a controller configured to limit charge and discharge currents of the battery according to predetermined charge and discharge power transfer limits, reduce the limits in response to a change in at least one condition of the battery, and permit the currents to exceed the corresponding reduced limits for a predetermined duration of time during a transmission shift event or an engine start event.
A method comprising:
- by a processor,
- limiting power transfer between an electric machine and battery according to a power transfer schedule based on a temperature and state of charge of the battery;
- during a transmission gear shift, allowing power transfer from the electric machine to the battery to exceed the power transfer schedule;
- and
- during an engine start event, allowing power transfer from the battery to the electric machine to exceed the power transfer schedule.
Dependencies are inferred from the claim text.