The present disclosure relates to a wireless charging transmitter system and its control method. The system includes at least two transmit coils, configured to simultaneously transmit power; at least two transmit circuits, wherein each of the transmit circuits is electrically connected to each of the transmit coils, and is configured to supply a current to the transmit coil; and at least one decoupling circuit, wherein the decoupling circuit is connected to any two coupled transmit coils of the at least two transmit coils. By controlling N switches in a first compensation circuit and/or M switches in a second compensation circuit in the decoupling circuit, compensation capacitors connected in parallel with two terminals of a first inductor and a second inductor are controlled such that the equivalent mutual-inductance of the decoupling circuit may be adjusted to improve decoupling precision and reduce power loss caused by coupling between transmit coils.

A vehicle is provided. The vehicle includes a solar generator; a first battery configured to supply power for driving at least one load; and perform a recharge; a first charge amount detector configured to detect a charge amount of the first battery; and a controller configured to perform charging control on the first battery using electric energy generated by the solar generator in a parked state; determine whether the detected charge amount of the first battery is greater than or equal to a first reference charge amount during the charging control of the first battery; and perform charging termination control on the first battery when the detected charge amount of the first battery is determined to be greater than or equal to the first reference charge amount.

A wireless power receiver includes a rectifier configured to convert a radio frequency (RF) voltage signal generated based on an RF input to a direct current (DC) voltage, and a boost converter configured to generate a voltage for battery charging using the RF voltage signal as a switching signal.

Systems and methods are described for managing charging and discharging of battery packs. In one or more aspects, a system and method are provided to minimize overcharging of battery cells of specific battery chemistries while still enabling fast charging cycles. In other aspects, a buck converter may be used to reduce a voltage of power used to charge the cells. In further aspects, a fast overcurrent protection circuit is described to address situations involving internal short circuits of a battery cell or battery pack. In yet further aspects, a bypass circuit is provided in series-connected battery packs to improve the charging of undercharged battery packs while also increasing the efficiency of the overall charging process. In other aspects, a circuit is provided that permits a controller to determine a configuration of battery packs. In yet further aspects, a system may determine a discharge current for a collection of battery packs based on each battery pack's state of health (SOH) and forward that determination to an external device.

A flywheel assembly for a renewable energy generation system includes a flywheel housing defining a cavity therein, a flywheel rotatably disposed within the cavity of the flywheel housing, where the flywheel is simultaneously formed from the same component as the flywheel housing, a magnetic levitation disk defining opposed upper and lower surfaces, the upper surface supporting the flywheel and the lower surface including a first plurality of magnets disposed thereon, and a base plate having a second plurality of magnets disposed on a surface thereof that is facing the first plurality of magnets, the second plurality of magnets having a polarity that is opposite of a polarity of the first plurality of magnets such that the magnetic force of the first and second plurality of magnets urges the magnetic levitation disk away from the base plate.

In a storage system including a plurality of battery units, the charge/discharge amounts of the battery units are determined by predetermined computation using the state of charge (SOC). The predetermined computation includes allocating a larger discharge amount to a battery unit higher in SOC, out of the battery units, in the discharge mode, and allocating a larger charge amount to a battery unit lower in SOC, out of the battery units, in the charge mode.

An apparatus for controlling optimization of a charging amount of a battery for a vehicle charged with external power includes: a map storage, a position detector, and a controller to control the map storage and the position detector. The controller acquires a current position of the vehicle when a driver's desired charging setting value is input, acquires altitude information of topography corresponding to a driving path, calculates a gain charging amount in an uphill or downhill section on the driving path based on the altitude information, calculates an optimum charging setting value based on the driver's desired charging setting value and the gain charging amount, calculates a final target charging amount based on the optimum charging setting value and a current residual charging amount, and performs optimum charging of the battery.

A rechargeable battery jump starting device with a discharged battery pre-conditioning system to facilitate boosting the discharged battery to jump start a vehicle or equipment engine. The pre-conditioning increases the operating voltage to the discharged battery during the pre-conditioning phase.

A power system includes at least one generator driven by at least one of a number (N) of prime movers, at least one energy storage device, and at least one control device, wherein the generator and the energy storage device provide electrical energy to a power grid having an external load. The power system includes at least one first measuring device for determining at least one first signal for a computer to determine what amount of electrical power (ΣP.sub.G,i) has to be generated by the at least one generator to meet a power requirement (P.sub.load) of the external load. The at least one control device is configured to receive the at least one first signal and to influence the control of the speed (n.sub.i) of the at least one of the number (N) of prime movers or the frequency (f) of the power grid taking into account the at least one signal to change the mechanical power generated by the at least one of the number (N) of prime movers such that the electrical power provided by the at least one generator approaches the power requirement (P.sub.load) of the external load in situations where the power requirement (P.sub.load) of the external load is at least partially provided for by the at least one energy storage device.

The present disclosure concerns a vehicle-mounted power supply system, comprising: a vehicle-mounted battery assembly; an electric motor electrically coupled to the vehicle-mounted battery assembly; and a controller operatively coupled to the vehicle-mounted battery assembly and the electric motor to selectively provide a voltage outputted by the vehicle-mounted battery assembly to the electric motor. It also concerns a method for discharging a fluid from a tank of a truck with a truck-mounted fluid transfer pump system.