The invention relates to a method for reducing the overall power consumption of a parked vehicle, whereby said vehicle comprises a DC power network including two batteries connected in series and an equalizer circuit, whereby the equalizer circuit includes a DC/DC converter for converting an input voltage corresponding to the sum of the voltages of the two batteries into an output voltage to be applied to a first battery of the two batteries. The method consists in i) activating the DC/DC converter only when the State of Charge (SoC) of the first battery reaches a first level below the State of Charge (SoC) of the second battery; and u) keeping the DC/DC converter active until the State of Charge (SoC) of the first battery reaches a second level above the State of Charge (SoC) of the second battery.

High power bidirectional charging systems with a split battery architecture are disclosed. The bidirectional charging systems can include a bidirectional charger and an integrated battery. The bidirectional charger is bidirectional, providing vehicle-to-grid (V2G) energy transfer capability from an electrical grid to an electric vehicle (EV), as well as electrical energy transfer capability from the integrated battery to the power grid and from EV battery to the electrical grid. The integrated battery is split into two sections. A first battery section is a lower voltage battery, which can feed the output direct current (DC) directly without a converter. A second battery section is a higher voltage battery. The output power provided by the charger can exceed voltage limits of the individual electronic components by adding the output of the first integrated battery section with an output of the second integrated battery section.

Technologies and techniques for charging a high-voltage battery of an electric drive of a vehicle, in which electrical power is transmitted from a low-voltage on-board electrical system of the vehicle to the high-voltage battery, and, to aid starting of the vehicle, electrical power is transmitted from a separate external unit to the low-voltage on-board electrical system of the vehicle and is transmitted from the low-voltage on-board electrical system to the high-voltage battery. The present disclosure also relates to a related power transmission system.

A vehicle that has electronic systems including an autonomous vehicle stack includes a dual output power system for powering the electronic systems of the vehicle. The power system includes a battery at a first voltage level for storing energy at the first voltage level, a dual output belt-driven starter generator that is started by a starter receiving power from the battery at the first voltage level and that provides dual outputs at a second voltage level for providing power to the electronics systems, at least one DC-DC converter that converts the dual outputs at the second voltage level to dual outputs at the first voltage level, and first and second power distributors that distribute power from the battery and DC-DC converter(s) to the electronic systems. The power systems may be configured to power safety critical components from respective power distributors and DC-DC converters at the respective voltage levels.

A vehicle power supply device converts power from high voltage to low voltage by selectively connecting a predetermined power storage element group to a low voltage electric load from a high voltage power supply formed by connecting power storage elements in series. A leakage resistance from the high voltage power supply to the ground is measured when the high voltage circuit is cut by the cutoff means placed between the high voltage power supply and the high-voltage load device. When the value less than a predetermined value, the connection between the high voltage power supply and the high-voltage load device is interrupted, so that electric shock is prevented.

An in-vehicle power supply system includes: a main battery; an upper power supply unit configured to supply power of a power supply to the main battery; a first power supply line allocated to conduct the power of the power supply of a first voltage; a second power supply line allocated to conduct the power of the power supply of a second voltage lower than the first voltage; a step-down conversion unit configured to step down a voltage of the first power supply line to supply the power of the power supply to the second power supply line; and a capacitor. The upper power supply unit, the capacitor, and an input of the step-down conversion unit are connected to the first power supply line. The main battery and an output of the step-down conversion unit are connected to the second power supply line.

An example system includes a first plurality of nacelles located on a first side of an aircraft, wherein each nacelle of the first plurality of nacelles includes an electric motor coupled to a propulsor, wherein an outboard nacelle of the first plurality of nacelles includes an electrical energy storage system (ESS) coupled to a first electrical bus; and a second plurality of nacelles located on a second side of the aircraft, wherein each nacelle of the second plurality of nacelles includes an electric motor coupled to a propulsor, wherein an outboard nacelle of the second plurality of nacelles includes an ESS coupled to a second electrical bus.

An on-board charging system for an electric vehicle comprising a generator (Dynamo) 1, coupled to the wheel of the electric vehicle. The generator produces a charging voltage which is connected to a 12 V battery, via voltage regular, the 12 V battery, and is connected to the input of a Power Boaster, which boasts the voltage from 12 V at the input to 48 V at the output. A Dual battery isolator is connected between the secondary Lithium battery and the Main lithium battery, that supply power to the a gear drive of the electric vehicle. When there is a drop in the voltage of the main lithium battery, during operation, the intelligent dual battery isolator triggers a release of the stored voltage from the secondary lithium battery pack to instantaneously charge up the main lithium battery, supplying power to the electric vehicle drive.

A vehicle electrical system for a vehicle includes first and second subsystems, each connected to at least one energy source. The first and second subsystems have different voltage levels. At least one safety-relevant load is connected to one of the subsystems, this subsystem having two partial systems, and the load being connected to both partial systems so that the load is connected to the energy source of the subsystem via two separate supply lines. A power module, which connects the two subsystems to each other and is designed such that each of the two supply lines can be connected to both energy sources so that the load can be supplied from both energy sources via both supply lines. There is also described a corresponding power module.

A discharge apparatus for an electrical drive arrangement of a vehicle, having an input interface, having an output interface, having a main switching device, wherein the main switching device is connected to the input interface, having a first discharge branch, wherein a first input of the first discharge branch is connected to the main switching device, having a second discharge branch, and having a control device, wherein the control device is designed to connect the first discharge branch in a first discharge state of the discharge apparatus and to connect the second discharge branch in a second discharge state.