US 12,391,148 B2
Battery heating system
Chandra S. Namuduri, Troy, MI (US); and Neeraj S. Shidore, Novi, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Aug. 3, 2021, as Appl. No. 17/392,487.
Prior Publication US 2023/0043498 A1, Feb. 9, 2023
Int. Cl. B60L 58/27 (2019.01); H01M 10/0525 (2010.01); H01M 10/615 (2014.01); H01M 10/625 (2014.01); H02M 7/5387 (2007.01); H05B 1/02 (2006.01)
CPC B60L 58/27 (2019.02) [H01M 10/615 (2015.04); H01M 10/625 (2015.04); H02M 7/5387 (2013.01); H05B 1/0236 (2013.01); B60L 2210/46 (2013.01); H01M 10/0525 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A heating apparatus for a battery, comprising:
a first solid state switch having respective first and second terminals and a second solid state switch having respective first and second terminals, wherein the first solid state switch and the second solid state switch comprise one leg of an inverter coupled between a positive DC rail and a negative DC rail;
the second terminal of the first solid state switch coupled to the first terminal of the second solid state switch at a first node;
a coupling between a positive terminal of the battery and the first node with an inductance between the first node and the battery, wherein the inductance is switchably connected to the positive terminal of the battery by a third switch;
a negative terminal of the battery coupled to the second terminal of the second solid state switch at a second node;
a capacitance between the second node and the first terminal of the first solid state switch at a third node; and
a controller repeatedly closing the second switch and opening the first switch for a first duration followed by opening the second switch and closing the first switch for a second duration.