Gm global technology operations llc (20240429481). BATTERY ELECTRIC SYSTEM WITH ALTERNATING CURRENT SELF-HEATING MODE
BATTERY ELECTRIC SYSTEM WITH ALTERNATING CURRENT SELF-HEATING MODE
Organization Name
gm global technology operations llc
Inventor(s)
Neeraj S. Shidore of Novi MI (US)
Chandra S. Namuduri of Troy MI (US)
Nicholas W. Pinto of Shelby Township MI (US)
BATTERY ELECTRIC SYSTEM WITH ALTERNATING CURRENT SELF-HEATING MODE
This abstract first appeared for US patent application 20240429481 titled 'BATTERY ELECTRIC SYSTEM WITH ALTERNATING CURRENT SELF-HEATING MODE
Original Abstract Submitted
a battery electric system includes an inverter connected to a battery pack and a direct current (dc) voltage bus, first and second electrical switches, and a battery controller. the first switch is connected between the inverter and battery pack, and opens during an alternating current (ac) self-heating mode of the battery pack. this mode includes generating an ac waveform through the battery pack via the inverter at a controlled amplitude. the second switch, which is connected to the inverter and the first switch, closes during the self-heating mode. the controller, in response to calibrated entry criteria, opens the first switch, closes the second switch, and controls on/off conducting states of the power switches to self-heat the battery pack using the ac waveform. the entry criteria includes required charging of the battery pack while a temperature of the battery pack is less than a calibrated temperature limit.