A vehicle electrical system is equipped with a DC charging connection, a rechargeable battery, a first DC-DC converter and an electrical drive. The first DC-DC converter has a first side. This is connected to a connecting point via a first switch. The first DC-DC converter has a second side to which the electrical drive is connected. The second side is connected to the rechargeable battery via a second switch and via a connecting point or is connected to the rechargeable battery directly. The vehicle electrical system has a second DC-DC converter. This is connected to one side of the first switch.

A battery system includes: a battery and a battery management system (BMS) for controlling charging of the battery depending on a normal mode using a first battery capacity between a first lower limit state of charge (SOC) and a first upper limit SOC or an eco-friendly mode using a second battery capacity between a second lower limit SOC and a second upper limit SOC, the first lower limit SOC is smaller than the second lower limit SOC, and the first upper limit SOC is greater than the second upper limit SOC.

A method for vehicle-to-vehicle charging for electric vehicles, including: controlling a three phase bi-directional on-board charger of a first electric vehicle to provide a DC power from an energy storage system of the first electric vehicle at a first terminal L1 and a second terminal L2 of the three phase bi-directional on board-charger of the first electric vehicle; transferring the DC power from the first terminal L1 of the first electric vehicle to an energy storage system of a second electric vehicle, and from the second terminal L2 of the first electric vehicle to an energy storage system of a third electric vehicle.

A control method for a bi-directional DC/DC converter. A source terminal transmits electric energy to a destination terminal sequentially through a first rectifier module and a second rectifier module of the converter. The method includes obtaining a first voltage value output by the first rectifier module in a current control cycle, obtaining a second voltage value output by the second rectifier module in the current control cycle, calculating a theoretical voltage control quantity of the bi-directional DC/DC converter in the current control cycle based on a preset reference voltage value and the second voltage value, and setting an actual output voltage of the bi-directional DC/DC converter in a next control cycle based on the theoretical voltage control quantity and the first voltage value.

Various disclosed embodiments include illustrative controller modules, direct current (DC) fast charging devices, and methods. In an illustrative embodiment, a controller module for a DC-DC converter includes a controller and computer-readable media configured to store computer-executable instructions configured to cause the controller to receive an input voltage V.sub.in to the DC-DC converter, receive an output DC voltage V.sub.o from the DC-DC converter, generate control signals configured to control a charging output of the DC-DC converter responsive to the received input voltage V.sub.in and output voltage V.sub.o, and output the generated control signals to the DC-DC converter.

A charge coupler adapted to be coupled to a charging inlet of an electric vehicle, the charge coupler including: a housing including a first portion adapted to be disposed around a first plurality of contacts and a second portion adapted to be disposed around a second plurality of contacts; a conductive member disposed between the first portion of the housing and the second portion of the housing; and a control system coupled to the conductive member and operable for sensing a break in the conductive member indicating damage to one or more of the first portion of the housing and the second portion of the housing or that the second portion of the housing is detached from the first portion of the housing. Optionally, the conductive member includes a conductive loop disposed around an inner periphery of the housing, the first plurality of contacts, and the second plurality of contacts.

A wireless-charging adapter is connectable to a direct current (DC) fast charger and includes an induction coil for wireless charging a second induction coil on a vehicle. In some instances, the adapter may include an electrical connector to mate with a DC fast charger. In addition, the adapter may include hardware and/or software to receive a DC from the DC fast charger and provide an alternating current (AC) to the induction coil. The induction coil of the adapter may be positioned (e.g., on a ground surface) to align with an induction coil on a vehicle.

A charging station for charging a plurality of electric vehicles, in particular electric cars, comprising: a supply device, in particular for connecting to an electricity supply grid, for supplying the charging station with electric power, a plurality of charging terminals each for charging at least one electric vehicle, and each charging terminal comprises a supply input for drawing electric power from the supply device, a charging output having one or more charging terminals each for outputting a charging current for respectively charging a connected electric vehicle, and at least one DC current controller, arranged between the supply input and the charging output, for generating a respective controlled current from the electric power from the supply device, wherein each charging current (IL1, IL2) is formed from a controlled current or from a plurality of controlled currents (IS1, IS2, IS3), and wherein the charging terminals are connected to one another at exchange terminals by way of electrical exchange lines in order to exchange controlled currents with one another by way of said exchange lines.

A portable rescue power bank for an electric vehicle. The portable rescue power bank includes an electrical energy storage, a first bidirectional DC/DC converter having a first side connected to the electrical energy storage and a second side connected to a high-voltage electrical connector that is suitable for being connected to a corresponding high-voltage electrical connector of the electric vehicle, a second bidirectional DC/DC converter having a first side connected to the electrical energy storage and a second side connected to a low-voltage electrical connector that is suitable for being connected to a corresponding low-voltage electrical connector of the electric vehicle, and an electronic control unit configured for controlling operation of the first and second bidirectional DC/DC converters.

A charging communication module and a charging method of an electric vehicle are provided. The charging communication module includes a voltage sensor that senses a voltage level of a signal line to generate a sensing result, a controller that generates first control information based on the sensing result and converts information of a first communication format provided from the signal line into information of a second communication format, and a switch device that electrically connects or disconnects the signal line with or from the controller based on the first control information.