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US 12,761,281 B2Granted
Managed fast charging for electric vehicles
AssigneeGarrett Transportation I Inc.
InventorsGergely Takacs, Jaroslav Pekar, Tomas Poloni
Life of this patent
Estimating the term…
Abstract
Methods and systems for controlling charging of the battery in an electric vehicle. Lithium plating is monitored, measured, or estimated. Identification of lithium plating conditions is used to determine whether and when to reduce charging current. Conversely, if no lithium plating conditions are identified, charging current may be increased toward a maximum level determined based on the state, age and/or health of the battery.
Claims19
A method of charging a vehicle battery comprising:
- determining an estimated state of the vehicle battery;
- initiating charging of the vehicle battery at a charging current determined from a predetermined model for charging the vehicle battery, the predetermined model including a plurality of modeled secondary electrolyte-interphase layer (SEI) resistance values;
- measuring SEI resistance as the vehicle battery is charged;
- adjusting the charging current to enable the measured SEI resistance to track the modeled SEI resistance values.
1 more element
A method of charging a vehicle battery comprising:
- determining an estimated state of the vehicle battery;
- obtaining a nominal charge curve from a model for the vehicle battery;
- updating the nominal charge curve to set and adjust an actual charge curve by detecting lithium plating conditions during charging;
- using the adjusted actual charge curve to control charging current delivered to the vehicle;
- and
- wherein the step of updating the nominal charge curve to set and adjust the actual charge curve by detecting lithium plating conditions during charging is performed by measuring secondary electrolyte-interphase layer (SEI) resistance as the vehicle battery is charged.
3 more elements
A vehicle comprising:
- a motor generator unit (MGU) for providing motive power to the vehicle;
- a rechargeable battery configured to provide electric power to the MGU;
- a charging controller configured to control charging of the rechargeable battery by:
- determining an estimated state of the rechargeable battery;
- initiating charging of the rechargeable battery at a charging current determined from a predetermined model for charging the rechargeable battery, the predetermined model including
- a plurality of modeled secondary electrolyte-interphase layer (SEI) resistance values;
- measuring SEI resistance as the rechargeable battery is charged;
- adjusting the charging current to enable the measured SEI resistance to track the modeled SEI resistance values.
5 more elements
Dependencies are inferred from the claim text.