	US 11,912,146 B2
	Vehicle with integrated DC-DC converter
Rashmi Prasad, Troy, MI (US); and Chandra S. Namuduri, Troy, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Apr. 23, 2021, as Appl. No. 17/239,241.
Prior Publication US 2022/0340026 A1, Oct. 27, 2022
Int. Cl. B60L 53/20 (2019.01); B60L 53/16 (2019.01); B60L 53/18 (2019.01); H02J 7/00 (2006.01); H02P 27/06 (2006.01); B60K 6/28 (2007.10)

CPC B60L 53/20 (2019.02) [B60L 53/16 (2019.02); B60L 53/18 (2019.02); H02J 7/0045 (2013.01); H02P 27/06 (2013.01); B60K 6/28 (2013.01); B60Y 2200/91 (2013.01); B60Y 2200/92 (2013.01); B60Y 2300/91 (2013.01); H02J 2207/20 (2020.01)]

20 Claims

1. A battery charging system, comprising:

an electric motor including stator coils;

a battery;

a charge port configured to receive power from charging stations by wire;

first and second electrical conductors connected between the battery and the charge port;

an inverter module including (a) inputs connected to receive power from the battery and (b) outputs connected to U, V, and W phases of the electric motor and configured to output positive reference potentials to the electric motor;

a third electrical conductor; and

a switch configured to electrically connect and disconnect a first end of the third electrical conductor to and from the first electrical conductor,

wherein the third electrical conductor includes a second end that is directly connected to the U phase of the electric motor and one of the outputs of the inverter module.

19. A battery charging system, comprising:

an electric motor including stator coils;

a battery;

a charge port configured to receive power from charging stations by wire;

first and second electrical conductors connected between the battery and the charge port;

a third electrical conductor; and

a switch configured to electrically connect and disconnect a first end of the third electrical conductor to and from the first electrical conductor,

wherein the third electrical conductor includes a second end that is directly connected to (a) the U phase of the electric motor and (b) one output of a group of outputs of an inverter module, the outputs of the inverter module connected to U, V, and W phases of the electric motor and configured to output positive reference potentials to the electric motor.

20. A battery charging method, comprising:

receiving power from a charging station by wire using a charge port;

electrically connecting a battery with the charge port via first and second electrical conductors;

by an inverter module, receiving power from the battery and outputting power to via outputs of the inverter module to U, V, and W phases of an electric motor, the electric motor including stator coils, and the outputs configured to output positive reference potentials to the electric motor; and

by a switch, electrically connecting and disconnecting a first end of a third electrical conductor to and from the first electrical conductor,

wherein the third electrical conductor includes a second end that is directly connected to the U phase of the electric motor and one of the outputs of the inverter module.