Abstract: A connector module, which includes a male connector having a first housing and first terminals accommodated in the first housing; a female connector having a second housing configured such that the first housing is fitted therein and second terminals accommodated in the second housing and a connector connection detecting unit having a pressure sensor configured to contact at least one side of the first housing when the first housing is entirely fitted into the second housing, the connector connection detecting unit being configured to transmit a connection state of the male connector and the female connector to an external device.

Abstract: Provided is a power supply circuit for energy transfer between a battery and a smoothing capacitor, a battery management system and a battery pack. The power supply circuit includes a transformer including a first winding and a second winding, a first switching circuit including a first switch connected in series to the first winding, and connected in parallel to the battery together with the first winding, a second switching circuit including a second switch connected in series to the second winding, and connected in parallel to the smoothing capacitor together with the second winding, and a switch controller. To pre-charge the smoothing capacitor, the switch controller is configured to perform a first operation of turning on the first switch and turning off the second switch, and subsequently perform a second operation of turning off the first switch and turning on the second switch.

Abstract: Disclosed is a battery management apparatus, which includes: a precharging unit having a plurality of switches, the precharging unit being connected to the first main relay in parallel and connected between the second main relay and the second charge/discharge terminal; a control unit configured to control the plurality of switches which causes an output voltage of the battery module to be converted into an AC voltage and applied to the first main relay or the second main relay; and a diagnosing unit configured to diagnose a failure of the first main relay based on a first both-end voltage value of the first main relay to which the AC voltage is applied or to diagnose a failure of the second main relay based on a second both-end voltage value of the second main relay to which the AC voltage is applied.

Abstract: Provided is a power supply circuit for energy transfer between a battery and a smoothing capacitor, a battery management system and a battery pack. The power supply circuit includes a transformer including a first winding and a second winding, a first switching circuit including a first switch connected in series to the first winding, and connected in parallel to the battery together with the first winding, a second switching circuit including a second switch connected in series to the second winding, and connected in parallel to the smoothing capacitor together with the second winding, and a switch controller. To pre-charge the smoothing capacitor, the switch controller is configured to perform a first operation of turning on the first switch and turning off the second switch, and subsequently perform a second operation of turning off the first switch and turning on the second switch.

Abstract: Disclosed is a battery management apparatus, which includes: a pre-charging unit having a plurality of switches and connected to the first main relay in parallel, the pre-charging unit being connected between the second main relay and the second charging/discharging terminal; a control unit configured to control the plurality of switches so that an output voltage of the battery module is reduced to a reduced voltage and output between the first charging/discharging terminal and the second charging/discharging terminal; and a diagnosing unit configured to diagnose a connection state in the load based on a load current value of the current flowing in the load to which the reduced voltage is applied.

Abstract: Disclosed is a battery management apparatus, which includes: a precharging unit having a plurality of switches, the precharging unit being connected to the first main relay in parallel and connected between the second main relay and the second charge/discharge terminal; a control unit configured to control the plurality of switches which causes an output voltage of the battery module to be converted into an AC voltage and applied to the first main relay or the second main relay; and a diagnosing unit configured to diagnose a failure of the first main relay based on a first both-end voltage value of the first main relay to which the AC voltage is applied or to diagnose a failure of the second main relay based on a second both-end voltage value of the second main relay to which the AC voltage is applied.

Abstract: Disclosed is a battery management apparatus, which includes: a pre-charging unit having a plurality of switches and connected to the first main relay in parallel, the pre-charging unit being connected between the second main relay and the second charging/discharging terminal; a control unit configured to control the plurality of switches so that an output voltage of the battery module is reduced to a reduced voltage and output between the first charging/discharging terminal and the second charging/discharging terminal; and a diagnosing unit configured to diagnose a connection state in the load based on a load current value of the current flowing in the load to which the reduced voltage is applied.