Various disclosed embodiments include illustrative direct current (DC) power electronics modules, charging systems, and methods. In an illustrative embodiment, a DC power electronics module includes an electronics component configured to provide DC power to at least a first battery and a second battery, a processor configured to communicate with the electronics component, and non-transitory computer-readable media configured to store computer-executable instructions. The stored instructions cause the processor to determine connection status of the first battery and the second battery to the DC power electronics module and instruct the electronics component and/or a connection device to allocate DC power to the first battery and the second battery responsive to the determination that the first battery and the second battery are connected to the DC power electronics module.

In a case that the at least one transmission antenna is transmitting a high-frequency power to at least a first wireless power reception apparatus and it is detected that at least a second wireless power reception apparatus is newly electromagnetically coupled with at least one transmission antenna, a wireless power transmission apparatus changes one of a frequency or a amplitude of the high-frequency power depending on a voltage value received from each of at least the first and second wireless power reception apparatuses, to regulate the voltage value of each power reception coil included in each of at least the first and second wireless power reception apparatuses to be equal to or lower than an upper limit value of the voltage value, circuit elements included in each of the first and second wireless power reception apparatuses being durable for the upper limit value.

An electronic device according to various embodiments of the present disclosure includes a rechargeable battery, and at least one processor. The processor generates usage pattern information of the battery based on a charge/discharge state of the battery, and configures charge/discharge information of the battery using the usage pattern information that is used to optimize battery life, operating capability of the battery, or a charge/discharge state that is an optimized tradeoff between such factors.

A method of a charging apparatus for controlling wireless charging is provided. The method includes detecting an electronic device, determining a charging method corresponding to the detected electronic device, and wirelessly charging the electronic device by selecting a coil corresponding to the determined charging method.

A battery charger and method is disclosed for detecting when a battery has a low state of health while simultaneously charging or maintaining the battery. A battery charger includes a processor; a non-transitory memory device; a power management device to receive an input power and to output a charging current; a pair of electrical conductors to electrically couple with a battery, and a display electrically coupled to the processor. The display being configured to indicate a bad battery indicator when the battery has a low state of health and whether the battery is good to start.

Disclosed is an apparatus for efficiently managing a battery system in a situation where a charge or discharge power varies with time. The apparatus for managing a battery system includes a power measuring unit configured to measure the magnitude of a charge power supplied to a battery system or a discharge power output from the battery system, a reference setting unit configured to variably set a power distribution reference according to the measured magnitude of power, and a power distributing unit configured to distribute and supply a charge power to battery units having different outputs and capacities according to the set power distribution reference or allow a discharge power to be distributed and output from battery units having different outputs and capacities according to the set power distribution reference.

A device includes an AC impedance circuit to apply an AC excitation signal to a set of battery cells of a battery pack. The device includes a controller to determine a battery pack identification (ID) value from a battery pack identification (ID) circuit of the battery pack, calculate an impedance value of the battery pack based on the AC excitation signal, identify a maximum charging rate to charge the battery pack using the battery pack ID value of the battery pack and the impedance value of the battery pack, where the battery pack is one of at least two battery packs having a same battery pack ID value with different maximum charging rates, and set a charging rate to charge the battery pack using the maximum charging rate.

A method for conducting an operation including a power tool battery pack. The battery pack can include a housing, a first cell supported by the housing and having a voltage, and a second cell supported by the housing and having a voltage. The battery pack also can be connectable to a power tool and be operable to supply power to operate the power tool. The method can include discharging one of the first cell and the second cell until the voltage of the one of the first cell and the second cell is substantially equal to the voltage of the other of the first cell and the second cell.

A movable platform includes one or more propulsion units configured to provide a driving force to the movable platform and a control unit operatively coupled to the one or more propulsion units. The control unit is configured to: communicate with a plurality of batteries adapted to supply current to the one or more propulsion units; obtain one or more electrical characteristics of each of the plurality of batteries; and determine, based on the electrical characteristics, a controlling signal to set a power supply state for at least one of the plurality of batteries.

A lithium battery designed to replace lead-acid battery. The lithium battery has a plurality of battery cells connected in series and a battery management unit. The battery management unit includes a controller, a sensing unit connected to the plurality of battery cells and the controller, a charging control unit connected to the controller, and a discharging control unit connected to the controller. The battery management unit prevents the batteries connected in parallel from mutually charging each other and also prevents the batteries being depleted completely by outputting a low voltage in pulse mode when the battery has low charge.