A device for controlling a vehicle includes a sensor that obtains state information of the vehicle, and a power controller which is configured to determine whether an activation condition of a dark current blocking control function is satisfied based on the state information of the vehicle, determines whether a power control mode is selected when the activation condition of the dark current blocking control function is not satisfied, and controls to cut off power supply to a dark current load based on the selected power control mode.

An energy supporting device for a power transmission system is disclosed, the energy supporting device comprising: a first energy supporting arrangement including at least a first string of two or more cells connected in series; a second energy supporting arrangement including at least a second string of two or more cells connected in series, wherein said first string and said second string are at least electrically connectable in series, wherein each cell of the second string comprises a power electronics building block, wherein the energy supporting device is configured to regulate voltage in the energy supporting device at least temporarily by means of one or more cells of the second string when said energy supporting device is operated in one of said at least one charging mode. A power transmission system, a method of providing energy support for a power transmission system, and a control device are also provided.

A system and method are provided for controlling charging and discharging of a group of batteries connected in parallel. A battery charging/discharging control system includes a first battery group comprising one or more first batteries connected in parallel, a second battery group connected in parallel with the first battery group and comprising one or more second batteries connected in parallel, and a charging/discharging controller to generate a first current pulse and a second current pulse, different from the first current pulse. The charging/discharging controller supplies the first current pulse and the second current pulse to the first battery group and the second battery group to control charging/discharging.

A battery control apparatus may include a power supply unit connected to a charging and discharging path of a battery, a driving unit configured to operate the power supply unit by applying a starting power to the power supply unit during a preset starting time from the charging and discharging path, a switching unit connected between the charging and discharging path of the battery and the power supply unit, and a control unit configured to turn on the switching unit in response to that a first operation power output from the power supply unit is applied, and to be driven through a second operation power generated by the power supply unit after the starting time.