A method for heating a battery pack of an electrified powertrain system having an electric motor includes determining a temperature of the battery pack. Responsive to the battery temperature being less than a predetermined threshold temperature, the method includes executing a self-heating mode of the battery pack. This includes injecting a high-frequency direct-axis alternating current voltage waveform that minimizes output torque and prevents rotation of a rotor of the electric motor. An AC current waveform is applied to the battery pack as a result of the voltage injection. A controller includes a temperature sensor configured for determining a temperature of the battery pack and a processor configured to perform the method. A motor vehicle includes the controller, an electrified powertrain system having the battery pack and an electric motor, and road wheels connected to and powered by electric motor.
HIGH-FREQUENCY ALTERNATING CURRENT BATTERY HEATING USING VOLTAGE COMMANDS
2025-04-17
Patent
Electronic Resource
English
IPC: | H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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