Eis-based health-degradation handling fast-charging for electric vehicles
AssigneeGarrett Transportation I Inc.
InventorsSemaria Ruiz Alvarez, Matej Pcolka, Gergely Takacs
Life of this patent
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Abstract
Methods and systems for controlling fast-charging of the battery in an electric vehicle. Battery characteristics are communicated from the electric vehicle to an analyzer, which may be cloud based or may be part of a charging station. The analyzer generates temperature control signals that are communicated to the electric vehicle, and charging current control signals that are provided to charging circuitry of the charging station.
Claims20
A method of controlling charging of a battery in an electric vehicle by a charging station, the method comprising:
- the vehicle sending a set of battery parameters to an analysis system prior to charging;
- the analysis system using the battery parameters to calculate a target charging current profile and a target temperature profile for a charging operation;
- the analysis system sending a first set of temperature control signals to the vehicle;
- the vehicle receiving the first set of temperature control signals;
- with the vehicle coupled to a charging station:
- the charging station issuing current to the electric vehicle to charge the battery by controlling the current to match the target charging current profile;
- and
- the electric vehicle using the first set of temperature control signals to control a temperature of the battery.
An analyzer for determining a cycle for charging of a battery in an electric vehicle by a charging station, the analyzer comprising a controller and a controller-readable memory storing executable instructions for performing the following:
- receiving a set of battery parameters from the electric vehicle prior to charging;
- calculating a target charging current profile and a target temperature profile for a charging operation based on the set of battery parameters;
- sending a first set of temperature control signals to the electric vehicle based on the target temperature profile;
- and
- sending the target charging current profile to a charger controller in the charging station.
An electric vehicle comprising:
- a battery for providing driving power to the electric vehicle;
- a battery thermal management system (BTMS);
- and
- an electrochemical impedance spectroscopy (EIS) diagnostic system for performing EIS on the battery to obtain a complex impedance thereof;
- a controller configured to:
- control the EIS diagnostic system to perform EIS on the battery to determine a complex impedance of the battery;
- in anticipation of a charging event at a charging station, send the complex impedance, a state of charge of the battery, and a temperature of the battery to an analyzer;
- receive, from the analyzer one or more temperature control instructions;
- control the BTMS to execute the one or more temperature control instructions during charging of the battery at the charging station.
Dependencies are inferred from the claim text.