An electronic device including a first switch module, a first electrical connection terminal, a second electrical connection terminal, and a control module. The first switch module is electrically connected between the first electrical connection terminal and the second electrical connection terminal, the first electrical connection terminal is configured to electrically connect to a third electrical connection terminal of a second electronic device, and the second electrical connection terminal is configured to electrically connect to a fourth electrical connection terminal of the second electronic device. The control module is connected to the first switch module to control the first switch module to switch between an on state and an off state.

An elevator includes: a car moving in a hoistway; a load provided to the car; a first power storage unit, composed of one battery capable of charging and discharging, connected to the load, and supplying power to the load; a second power storage unit, composed of one or more batteries capable of charging and discharging, and connected to the load; a power transmission circuit and capable of transmitting power between the first power storage unit and the second power storage unit; and a control unit controlling the power transmission circuit to supply power from the second power storage unit to the first power storage unit, when it is determined that a remaining stored power amount of the battery constituting the first power storage unit is less than an amount of power required for driving the load for a certain period of time.

In a power supply system and a method for controlling the same, at least one battery from among a plurality of batteries is designated as a charging-side battery, and the remaining batteries are designated as discharging-side batteries. Next, the difference in current between the current flowing from the discharging-side batteries and the current flowing into the charging-side battery is determined on the basis of currents measured by a plurality of current measuring instruments. Next, the transformation rate of a voltage transformer connected to the discharging-side batteries is determined on the basis of the determined difference in current.

An information processing apparatus is provided. Acquisition means acquires first information regarding OCVs of a plurality of secondarily used vehicle batteries. Determination means determines a combination of the vehicle batteries based on the first information such that the OCV of the vehicle batteries falls within a target range with charging and discharging between the vehicle batteries.

The present invention provides a charging stand includes a base, a housing, a circuit board, and a rotatable connector. An upper surface of the housing is formed with an opening. A plurality of sidewalls of the housing are engaged with a periphery of the base, and the housing has an accommodation space inside. The circuit board is disposed on the base. The circuit board is contained in the accommodation space in the housing, and suitable for being connected to an external power supply. The rotatable connector is pivotally connected to the base. The rotatable connector is electrically connected to the circuit board, and is contained in the accommodation space in the housing and visible from the opening.

This invention relates to a mobile charging unit (1), particularly for one or more electric vehicles (4), of the type including rechargeable batteries (41), comprising a mobile charging vehicle (2), and a charging apparatus (3), installed on said charging vehicle (2), having, in turn: an energy accumulation group (5), equipped with accumulators (51) for containing energy for charging said electric vehicles (4); an inverter (6), connected to said accumulators (51), comprising a DC-AC-DC converter (62) to convert the direct current coming from said accumulators (51) into alternating current, wherein said inverter (6) is connectable to an alternating current network (9) and is adapted to transform the alternating current of said alternating current network (9) into direct current for charging said accumulators (51); and an internal control system (7), connected to said inverter (6), adapted to control the operation of said inverter (6); said charging apparatus (3) is characterised in that said inverter (6) further comprises a direct current bus (63), connected to said DC-AC-DC converter (62), and a DC-DC converter (61), from direct current into direct current, connected to said direct current bus (63) and connectable to the rechargeable batteries (41) of said vehicle (4). This invention also relates to a method (200) for selecting a mobile charging unit (1) and a management system (100) for managing a mobile charging unit (1), the accumulated energy and the delivery of charges on request.

A power system within a battery-powered node includes a primary cell, a secondary cell, and a battery controller. The battery controller includes a constant current source that draws power from the primary cell to charge the secondary cell. The battery-powered node draws power from the secondary cell across a wide range of current levels. When the voltage of the secondary cell drops beneath a minimum voltage level, the constant current source charges the secondary cell and a charging signal is sent to the battery-powered node. When the voltage of the second cell exceeds a maximum voltage level, the constant current source stops charging the secondary cell and the charging signal is terminated. The battery-powered node records the amount of time the charging signal is active and then determines a battery depletion level based on that amount of time. Battery replacement may then be efficiently scheduled based on the depletion level.

A display device, including a backplane, and a power generation component disposed on the backplane for converting kinetic energy generated by movement of the display device into electric energy and supplying power to the display device using the generated electric energy, the power generation component includes a generator, and a swing component with an eccentric structure, the swing component being connected to the generator and swingable during movement of the display device, so as to drive the generator to operate.

A battery connector, an electrical combination and methods. The electrical combination may include a battery connector including a housing with a support portion for a battery pack, and a circuit supported by the housing, the circuit including a universal serial bus (USB) input terminal connectable to a USB cable for receiving power, a charging terminal connectable to a pack terminal of the battery pack, and a battery charging portion operable to receive power from the USB input terminal and to output a charging current to the charging terminal to charge the battery pack.

An electric vehicle comprises: a plurality of charging ports, at least one of which is configured to provide power to another vehicle; and at least one processor or circuit configured to function as following units: an authentication unit configured to authenticate an electronic device associated with the other vehicle using an electronic key; and a control unit configured to control, in accordance with an authentication result of the authentication unit, power provision to the other vehicle using the charging port configured to provide the power.