CPC H01M 10/615 (2015.04) [G01R 31/382 (2019.01); H01M 10/48 (2013.01); H01M 10/625 (2015.04); H01M 10/63 (2015.04); H01M 10/6571 (2015.04); H02J 7/0068 (2013.01); H02M 1/0009 (2021.05); H02M 3/158 (2013.01); H02M 7/53871 (2013.01); H01M 2220/20 (2013.01)] | 20 Claims |
1. A device for thermal control of a battery system, comprising:
a heating control module electrically connected to the battery system and a conversion device configured to control power output from the battery system, the conversion device including a first inverter connected to a first electric motor, wherein the first inverter includes a plurality of phase legs, the plurality of phase legs are selectively connected to a propulsion bus by a set of switches, and a selected phase leg of the plurality of phase legs is selectively connected to a terminal of the battery system by a switch, the heating control module configured to perform:
measuring a current through the first inverter, the measured current provided by rotation of the first electric motor when the first electric motor is not producing torque, or provided by an energy source during vehicle charging;
opening the set of switches to disconnect the plurality of phase legs from the propulsion bus, and closing the switch to electrically connect the selected phase leg to the terminal;
controlling the first inverter to modulate the current through the conversion device and produce an alternating current (AC) heating current wherein controlling the first inverter includes controlling the selected phase leg of the first inverter to produce the AC heating current; and
applying the AC heating current to the battery system to heat the battery system to a desired temperature.
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