US 12,191,774 B2
Bidirectional power supply system for powering a battery management system of an electric vehicle
Matthias Flatscher, Graz (AT); and Peter Kurcik, Nikolai Im Sausal (AT)
Assigned to SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed on Jun. 21, 2022, as Appl. No. 17/845,330.
Claims priority of application No. 21180915 (EP), filed on Jun. 22, 2021; and application No. 10-2022-0070267 (KR), filed on Jun. 9, 2022.
Prior Publication US 2022/0407427 A1, Dec. 22, 2022
Int. Cl. B60R 16/02 (2006.01); B60L 50/60 (2019.01); B60L 58/18 (2019.01); B60R 16/03 (2006.01); B60R 16/033 (2006.01); H02J 7/00 (2006.01); H02M 3/335 (2006.01)
CPC H02M 3/33584 (2013.01) [B60L 50/60 (2019.02); B60L 58/18 (2019.02); H02J 7/0063 (2013.01); H02J 7/00711 (2020.01); B60L 2210/10 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A bidirectional power supply system for powering a control unit of an electric vehicle, the bidirectional power supply system comprising:
a low voltage board net that includes the control unit, the low voltage board net being adapted to supply power from a low voltage primary power supply to the control unit in a first mode of operation corresponding to normal operation;
a high voltage board net, the high voltage board net being configured to receive power from a high voltage traction battery of the electric vehicle;
a bidirectional DC-DC converter, in which a low voltage side is coupled to the low voltage board net, and a high voltage side is coupled to the high voltage board net;
a measurement element adapted to detect whether power from the low voltage primary power supply is lost; and
a switching element adapted to switch operation of the bidirectional DC-DC converter from the first mode to a second mode of operation, in accordance with detection of a loss of the low voltage primary power supply, wherein:
the bidirectional DC-DC converter is adapted to, in the first mode, transfer energy from the low voltage board net to the high voltage board net, to power components of the high voltage board net via the low voltage primary power supply, and
the bidirectional DC-DC converter is adapted to, in the second mode, transfer energy from the high voltage board net to the low voltage board net, to power the control unit via the high voltage traction battery.