Patent ID: 11942812
Assignee: HYUNDAI MOTOR COMPANY
Field: Transport (Mechanical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 0:
1. A battery system, comprising:
a main battery;
an inlet connected to an external charger through an outlet;
a bidirectional on-board charger (OBC) configured to:
in a charging mode, convert an alternating current (AC) power supplied from the external charger through the inlet to a direct current (DC) power to charge the main battery;
in a discharge mode, convert a high voltage DC power discharged from the main battery to a low voltage DC power to supply the converted power to a load;
a relay comprising a single pole double through (SPDT) circuit configured to switch an electrical connection between the bidirectional OBC and the inlet, or to switch an electrical connection between the bidirectional OBC and the load; and
a controller configured to:
in the charging mode, transfer, to the bidirectional OBC, an AC-DC power control signal instructing conversion from the AC power to the DC power; and
in the discharge mode, transfer, to the bidirectional OBC, a DC-DC power control signal instructing conversion from the high voltage DC power to the low voltage DC power;
wherein the controller is further configured to:
determine to operate in the charging mode when a connection signal of the inlet and a key-off signal are received; and

determine to operate in the discharge mode when a disconnection signal of the inlet and a key-on signal are received.