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US 8,751,086 B2Granted
Online battery capacity estimation
AssigneeFord Global Technologies, LLC
InventorsYonghua Li, Richard Dyche Anderson
Life of this patent
Estimating the term…
Abstract
An electric vehicle includes a controller configured to estimate battery capacity in accordance with a first state of charge estimation, a charge integration, and a second state of charge estimation. The first and second state of charge estimations are in accordance with time and temperature constraints and are such that the estimated battery capacity has limited uncertainty. The controller is further configured to generate an output based on the estimated battery capacity.
Claims17
An electric vehicle comprising:
- a controller programmed to monitor keyoff events and estimate battery capacity in accordance with a first state of charge (SOC) estimation, a charge integration, and a second SOC estimation;
- the first and second SOC estimations corresponding to respective first and second consecutive keyoff events and being in accordance with time and temperature constraints such that the SOC estimations are based on battery open circuit voltages;
- the controller being further configured to generate an output based on the estimated battery capacity.
A method of controlling an electric vehicle, comprising:
- generating, by a controller, an output based on an estimated battery capacity based on a first state of charge (SOC) estimation, a charge integration, and a second SOC estimation;
- the first and second SOC estimations corresponding to respective first and second consecutive keyoff events and being in accordance with time and temperature constraints such that the SOC estimations are based on battery open circuit voltages.
Dependencies are inferred from the claim text.