Operation of power electronics during battery communication loss
AssigneeFord Global Technologies, LLC
InventorsTrent Barkdull, William David Treharne, Jonathan Andrew Butcher
Life of this patent
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Abstract
A vehicle includes a battery control module and a controller. The battery control module is configured to issue at regular intervals a message indicative of a state of charge (SOC) of a battery. The controller is configured to, in an absence of receiving the messages at the regular intervals while in a key-on state and a torque demand is present, restrict power flow between the battery and an electric powertrain to a limit that is based on a predicted SOC to provide limited propulsive force.
Claims10
A method of controlling an electric powertrain comprising:
- in response to an absence of a state of charge (SOC) value of a battery broadcast by a battery module at a periodic interval,
- limiting net power flow of the electric powertrain to maintain the SOC value to within a predetermined range that is based on a predicted SOC value of the battery,
- diverting power between an accessory high-voltage load and the electric powertrain such that a change in power flow is minimized, and
- commanding an electrical generating machine torque of the electric powertrain at an angular speed to a power equal to provide power propulsion demand and parasitic losses of the electric powertrain to diminish a change in net battery power.
A vehicle comprising:
- a controller configured to,
- responsive to absence of a message indicative of an SOC of a battery received at a regular interval while in a key-on state and driver torque demand is present, divert power from a load, and
- generate torque of an electric machine at a speed to provide power equal to a propulsion demand and parasitic losses of the electric powertrain to diminish a change in battery power.
Dependencies are inferred from the claim text.