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 may be configured to issue at regular intervals a message indicative of an SOC of a battery. The controller may be 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.
Claims20
A vehicle comprising:
- a battery control module configured to issue at regular intervals a message indicative of an SOC of a battery;
- and
- a controller 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.
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, and
- diverting power between an accessory high-voltage load and the electric powertrain such that a change in power flow is minimized.
A powertrain module comprising:
- a controller configured to, in an absence of receiving a message indicative of an SOC of a battery at a regular interval while in a key-on state and a driver torque demand is present, output a command to divert power from an accessory high-voltage load to an electric machine such that a change in power flow with the battery is minimized.
Dependencies are inferred from the claim text.