A power supply charging system comprising: a) a first power cell having electrical energy stored therein; b) a second power cell having electrical energy stored therein, wherein the first power cell and the second power cell are adapted to not be in a discharging mode or a charging mode simultaneously; c) a third power cell in electrical communication with the first power cell and the second power cell, wherein the third power cell is adapted to operably supply power to the first power cell when in the charging mode or the second power cell when in the charging mode; and d) a control system which is adapted to alternate the power being supplied from the third power cell to the first power cell while in the charging mode and the second power cell which in the charging mode based on an occurrence of a pre-determined condition.

The present disclosure provides a battery supply circuit, a device to be charged, and a charging control method. The battery supply circuit includes a first cell, a second cell, a switch, a first switching unit and a second switching unit. A first end of the second cell is coupled to a first end of the second switching unit, and a second end of the second cell is coupled to a first end of the switch, a second end of the second switching unit is coupled to a second end of the switch; a first end of the first cell is coupled to the second end of the switch, a second end of the first cell is coupled to a first end of the first switching unit, and a second end of the first switching unit is coupled to the first end of the switch.

An autonomously activated electric energy storage device and a control method thereof are provided. The autonomously activated electric energy storage device includes a first battery cell, a second battery cell, a temperature detector, a first bidirectional charger, a second bidirectional charger and a control circuit. When the control circuit determines through the temperature detector that a battery cell temperature is equal to or lower than a low working temperature limit, the control circuit allows the first bidirectional charger to be electrically conducted with the first battery cell and the second bidirectional charger to be electrically conducted with the second battery cell, and the first battery cell and the second battery are controlled to perform power transfer therebetween through the first and the second bidirectional charger until temperatures of the first battery cell and the second battery cell are both higher than the low working temperature limit.

Methods and apparatus for vehicle-based drone charging are disclosed herein. A vehicle-based drone charging apparatus includes a charging device to be operatively coupled to a vehicle. The charging device is to charge a drone in response to the drone being operatively coupled to the charging device. The vehicle-based drone charging apparatus further includes a communication interface to be operatively coupled to the vehicle. The communication interface is to broadcast use information associated with the charging device. The use information includes location information associated with a location of the vehicle and fee information associated with a cost for use of the charging device.

The embodiments of the present application provide a power supply apparatus, a battery management system, a power supply system, a control method and a medium. The method includes: controlling, under a condition that a vehicle is in a parking state, a first battery pack of a power supply apparatus to supply power to a first load of the vehicle, and controlling the first battery pack and a second battery pack of the power supply apparatus to stop supplying power to a second load of the vehicle; acquiring, in a process of supplying power to the first load, a capacity parameter of the first battery pack; controlling, under a condition that the capacity parameter of the first battery pack is lower than a first preset capacity threshold, a direct current converter to transmit electric energy of the second battery pack to the first battery pack.

A battery management circuit that is provided for each of sets of battery cells connected in series in an energy storage device including the sets of the battery cells and at least one capacitor, and that includes: a positive connection terminal to be connected to a positive electrode of a corresponding one of the sets of the battery cells; a negative connection terminal to be connected to a negative electrode of the corresponding one of the sets of the battery cells; a capacitor connection terminal to be connected to a terminal of the at least one capacitor; and a control circuit that controls a connection operation of connecting the positive connection terminal or the negative connection terminal to the capacitor connection terminal, and causes the battery management circuit to perform the connection operation in synchronization with the connection operation of another battery management circuit among battery management circuits.

The efficient operation of an electric vehicle depends greatly on proper functioning of a battery pack in the electric vehicle. A system and method for optimizing the operation of the battery pack in an electric vehicle is provided. The system comprises a digital twin for a battery pack in an electric vehicle. The system determines the state of charge, state of health and temperature distribution in the battery pack using various models. This information can be used to predict optimal charge and discharge profiles of the battery pack for given load conditions, as well as remaining useful life of the battery. The digital twin would require inputs such as battery temperatures from the sensors, coolant flow rates, coolant temperature, ambient temperature, load on the vehicle, current and voltages from the pack and battery characteristics from the manufacturer.

A modular portable power station comprises a portable power charger that can be supplemented with battery expansion modules that can be mechanically and electrically connected, as needed, to increase power output and capacity. The power charger housing is adapted for mechanical connection to a battery expansion module. When the expansion module is mechanically connected to the charger housing, an internal battery of the expansion module is electrically connected to the internal battery of the power charger to provide a boost of additional power and capacity, which can be transferred to electronic devices in need of a charge. The expansion module includes connection means to complement the connection means on the portable power charger. Additionally, the expansion module may include further connection means, simulating the connection means of the portable power charger, so that multiple expansion modules can be connected to the portable charger, in series, at the same time.

A battery operated hair dryer includes a battery management and control module to control how to efficiently dry a user's hair while maintaining the health and charge of the battery.

A DC energy storage module has a plurality of DC energy storage devices electrically connected in series; an internal control unit in the DC energy storage module; and a power supply for the internal control unit. The power supply for the internal control unit includes one or more of the DC energy storage devices in the module, electrically connected to the internal control unit through a rectifying unit.