Deployable resistor to dissipate power during regenerative braking for electrified vehicle
AssigneeFca US LLC
InventorsRaymond J Tessier, Jr., Michael J Bachmann
Life of this patent
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Abstract
A regenerative braking system for an electrified vehicle includes a battery system, an electric motor and a regenerative system resistor. The battery system selectively stores and delivers power. The electric motor is powered by the battery system and transfers drive torque to a driveline for propulsion of the vehicle and that selectively directs regenerative power in a first mode to the battery system during regenerative braking. The regenerative system resistor is selectively moveable between a first position during the regenerative braking in the first mode and a second position where regenerative power is directed to the regenerative system resistor and dissipated as heat in a second mode.
Claims13
A regenerative braking system for an electrified vehicle, the regenerative braking system comprising:
- a battery system that selectively stores and delivers power;
- an electric motor that is powered by the battery system and transfers drive torque to a driveline for propulsion of the vehicle and that selectively directs regenerative power in a first mode to the battery system during regenerative braking;
- and
- a regenerative system resistor that is selectively movable between (i) a first position during the regenerative braking in the first mode wherein the regenerative system resistor is retracted toward the electrified vehicle out of substantial alignment with a direct air path during operation of the electrified vehicle and (ii) a second position, wherein the regenerative system resistor is moved to a deployed position from the electrified vehicle in substantial alignment with a direct air path during operation of the electrified vehicle, where regenerative power is directed to the regenerative system resistor and dissipated as heat in a second mode.
A method for controlling a regenerative braking system of an electrified vehicle, the method comprising:
- determining whether a battery system that selectively stores and delivers power can accept full power input;
- determining whether an accessory load can dissipate full regenerative power;
- and
- deploying a regenerative system resistor from (i) a first position during regenerative braking in a first mode wherein the regenerative system resistor is retracted toward the electrified vehicle out of substantial alignment with a direct air path during operation of the electrified vehicle to (ii) a second position wherein the regenerative system resistor is moved to a deployed position from the electrified vehicle in substantial alignment with a direct air path during operation of the electrified vehicle, wherein regenerative power is directed to the regenerative system resistor and dissipated as heat in a second mode based on a determination that the battery system cannot accept full power input and the accessory load cannot dissipate full regenerative power.
Dependencies are inferred from the claim text.