Volvo Car Corporation

Aditya Pratap Singh

Markus Ekström

Torbjörn Thiringer

Katriine Koit

Samuel Sjöstrand

Control strategies for an electric vehicle battery system that incorporate active cell temperature balancing are described. In an example, a method comprises employing, by a system operatively coupled to at least one processor, a smartcell battery system to supply power to one or more electrical systems of a vehicle, the smart cell battery system comprising a plurality of battery cells. The method further comprises controlling, by the system, operations of the battery cells in accordance with a control protocol that results in increasing a temperature of a subset of the battery cells based on the temperature being below a threshold temperature. In an example, the control protocol can include circulating current between the subset of battery cells and/or other battery cells excluded from the subset, actively discharging the subset of battery cells and redistributing the power to other battery cells excluded from the subset, and others.

Electric vehicle battery system control strategy incorporating active cell temperature balancing

Systems, devices, computer-implemented methods, and/or computer program products that can facilitate optimized control of an electric motor of an electric vehicle using a smartcell battery system are addressed. In an example, the system uses a central controller that wirelessly communicates with local controllers connected to clusters of battery cells configured to generate a three-phase current output to control the motor torque. The central controller and the local controllers perform a main control loop to control the three-phase current output with an update frequency of about 1 kHz. A local control loop with an update frequency of about 10 kHz is further implemented by the local controllers within the main control loop to detect and minimize disturbances in the motor operation using estimated local control information.

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Gothenburg, Sweden

Aditya Pratap Singh