US 12,012,006 B2
Circuit-triggered fault mitigation for battery electric system and motor vehicle having the same
Rashmi Prasad, Troy, MI (US); Robert J. Heydel, Clawson, MI (US); Andrew K. Chandler, Plymouth, MI (US); Shubham V. Shedge, Northville, MI (US); Chandra S. Namuduri, Troy, MI (US); and Eleni C. Pitses, Grosse Pointe Park, MI (US)
Assigned to GM Global Technology Operations LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Mar. 11, 2022, as Appl. No. 17/692,480.
Prior Publication US 2023/0286388 A1, Sep. 14, 2023
Int. Cl. H02H 9/08 (2006.01); B60L 3/00 (2019.01); B60L 3/04 (2006.01); B60L 58/14 (2019.01); B60L 58/15 (2019.01); H01H 39/00 (2006.01); H02P 23/26 (2016.01); H02P 27/14 (2006.01)
CPC B60L 3/04 (2013.01) [B60L 3/0046 (2013.01); B60L 58/14 (2019.02); B60L 58/15 (2019.02); H01H 39/006 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A battery electric system comprising:
a direct current (DC) voltage bus having a positive bus rail and a negative bus rail;
a battery pack connected to the DC voltage bus, and having a positive battery terminal and a negative battery terminal;
a main pyrotechnic fuse (“pyro fuse”) connected to the negative bus rail of the battery pack and the DC voltage bus;
a plurality of high-voltage (HV) components each connected to the DC voltage bus via a respective HV channel;
a plurality of current sensing elements each connected to a corresponding one of the HV components on the respective HV channel, and configured to output a measured current value;
a plurality of channel switches each integrated or connected in series with a respective one of the plurality of current sensing elements; and
a control system configured to selectively disconnect the battery pack from the DC voltage bus by transmitting a voltage signal to the main pyro fuse to disconnect the battery pack from the DC voltage bus in response to a force or deceleration fault, and to one or more of the plurality of channel switches to disconnect one of more of the plurality of HV components when the measured current value is indicative of a short-circuit fault.