A method for orienting a power receiving coil of a vehicle relative to a power emitting coil of a wireless charging system for a vehicle. The method includes detecting a positioning of the vehicle at a charging location in which the power receiving coil detects reception of electromagnetic radiation emitted from the power emitting coil, performing a calibration sequence in which the orientation of the power receiving coil and/or the power emitting coil is varied according to a predetermined scheme, while registering the electromagnetic radiation reception of the power receiving coil, in response to the calibrations sequence, determining a desired relative orientation including relative angle between the power receiving coil and the power emitting coil for which the electromagnetic radiation reception of the power receiving coil is in a top range of the registered electromagnetic radiation reception.

A system for controlling a group of charging stations for at least one electric vehicle includes a central device charger controller for controlling system operation. A plurality of charging units communicate with the central device charger controller. The plurality of charging units each further comprises charging circuitry for generating a charging current to the at least one electric vehicle responsive to power provided from a local power grid. A connector provides the generated charging current from the charging circuitry to the at least one electric vehicle. At least one interface within the central device charger controller enables communications with the central device charger controller and a plurality of mobile charging applications and controls charging of a connected at least one electric vehicle.

Provided is an electric storage device including: an electric storage unit; a temperature measurement unit that detects the temperature of the electric storage unit; a current measurement unit that measures the charge/discharge current of the electric storage unit; and a safety evaluation unit that calculates the safety evaluation value of the electric storage unit, where the safety evaluation unit determines a temperature range to which the temperature detected by the temperature measurement unit belongs among multiple temperature ranges, and calculates a safety evaluation value, based on the temperature range as a result of the determination and an accumulated value of a value related to the charge/discharge time of the electric storage unit.

A charging socket includes a housing formed of an electrically insulating material, a cavity in the housing receiving an electrical contact, and a dual-functional element partially protruding from an outer surface of the housing. The dual-functional element has a fixing component and a drainage component. The fixing component protrudes from the housing and fixes the housing to a mounting bracket. The drainage component has a drainage channel within the housing discharging fluids from the charging socket.

An AC-DC converter includes three phase terminals, first and second DC terminals, a first converter stage for converting between the AC signal and a first signal at first and second intermediate nodes, a second converter stage to convert between a second signal at third and fourth intermediate nodes and the DC signal at the first and second DC terminals. The second converter stage has a first active switch. A link connects the first and third intermediate nodes and the second and fourth intermediate nodes. A current injection circuit has second active switches. In a first mode, the first active switch and the second active switches are operated through PWM. In a second mode, the third and fourth intermediate nodes are continuously connected to the first and second DC terminals such that the second converter stage is inoperative and the second active switches are operated through PWM.

Example bidirectional energy transmission apparatus and methods are described. An example of a bidirectional energy transmission apparatus includes a controller and a bidirectional energy transmission circuit. A control terminal of the controller is connected to a controlled terminal of the bidirectional energy transmission circuit. In the example, the controller is configured to control the bidirectional energy transmission circuit to be in a rectification working state, so as to convert, into a first direct current voltage, a three-phase or single-phase alternating current voltage that is input from a first port of the bidirectional energy transmission circuit, and output the first direct current voltage from a second port of the bidirectional energy transmission circuit. The controller is configured to control the bidirectional energy transmission circuit to be in an inversion working state, so as to convert, into a three-phase or single-phase alternating current voltage.

An underwater wireless charging method and device using acoustic waves for covering the entire depth of sea is disclosed. Within 10 meters below the water-level, unmanned undersea vehicles (UUV) are charged from a mother ship . Between 10 meters and 100 meters below the water-level, a sound wave is directly sent from the mother ship to the underwater sensor to be charged. At the depth of more than 100 meters below the water-level, an underwater UUV is adopted to in situ charge the underwater sensor node at close range. The transmitting transducer converts electrical energy to sound energy through the inverse piezoelectric effect. The sound wave is then sent by the transducer to a hydrophone that transforms sound energy to electrical energy via the piezoelectric effect. The load can thus be charged. Three types of wireless charging can be realized by the station for different underwater application scenarios, so as to satisfy the wireless charging for covering the entire depth of sea.

A parking facility for motor vehicles includes a carrying device with parking spaces, reception devices that are movable into a parking position in the parking space and out of it, parking space-side contact elements that are suppliable with electrical energy, arranged on at least some reception devices, and corresponding device-side contact elements and a connection element electrically coupled thereto for connecting to a vehicle positioned on the reception device, where the parking space-side contact elements are arranged movably on the carrying device and/or the device-side contact elements are arranged movably on the reception device, and the contact elements are movable from a base position in the absence of the reception device to a contact position when the reception device assumes the parking position, in which contact position the corresponding contact elements are coupled to one another, and can be brought out of the contact position.

A DC converter, a controlling method, and a vehicle are provided. The DC converter includes: a first inductor, a switching unit, a diode, a first capacitor, a load resistor, a pre-charge control unit and a controller. The output terminal of the controller is connected with the control terminal of the switching unit and the control terminal of the pre-charge control unit. The controller is configured to control the switching unit to be turned on or turned off, and to control the resistor connected between the negative electrode of the diode and the first end of the load resistance in the pre-charge control unit when the switching unit is turned off, such that the direct current converter is pre-charged by the low-voltage power supply.

A system for connecting a first ship to a second ship, the system having a plurality of target items coupled to the second ship, a camera module coupled to the first ship and configured to provide information comprising positions of images of the target items in a FOV, and a processor coupled to the camera module and a memory and configured to determine a first position and a first orientation of the second ship relative to the first ship.