Disclosed is an electronic device comprising: a first input/output terminal; a second input/output terminal; a power source module; a first switch selectively connecting the first input/output terminal to the power source module; a second switch selectively connecting the second input/output terminal to the power source module; a diode having an anode electrically connected to the first input/output terminal and a cathode electrically connected to the power source module, so that the diode is connected in parallel to the first switch; and a control circuit for controlling the first switch and the second switch. The electronic device can prevent damage due to power from external electronic devices by controlling the first switch and the second switch in response to connection of the external electronic devices. Additional various embodiments identified through the specification are possible.

A power management system has a controller including one or more processors. The controller is configured to monitor electrical power on a power bus of a vehicle. The power bus is electrically connecting a power source to multiple subsystems of the vehicle for powering the subsystems via the electrical power on the power bus. The controller is further configured to determine that the electrical power on the power bus exceeds a designated power generation limit, and, in response, generate a reduction command message for communication to a lowest-priority subsystem of the subsystems. The reduction command message instructs the lowest-priority subsystem to reduce power consumption.

A device for DC-DC conversion includes a plurality of input ports to receive a set of DC voltage inputs, at least one DC voltage input being configured as a differential input, a plurality of input semiconductor switches, each input semiconductor switch being coupled to a respective input port of the plurality of input ports, an inductor coupled to each input semiconductor switch, a pair of output semiconductor switches coupled to the inductor, an output coupled to the inductor via the pair of output semiconductor switches, and a processor configured to generate input switch control signals for the plurality of input semiconductor switches to sequentially and selectively connect each DC voltage input to the inductor to charge the inductor and to generate an output switch control signal for the pair of output semiconductor switches to connect the inductor to the output to discharge the inductor via the output.

The invention relates to a method and system for electronic current control for a flexible DC battery pack, in which the battery pack has a plurality of flexibly interconnectable modules having a respective energy store and at least two respective controllable switches and the modules are electrically connected to one another to form a section having a first and a second section end and the two section ends are connected to a respective high-voltage connection, in which the at least two switches of a respective module interrupt a battery current I or interconnect the respective energy store at least in series or parallel with or to bypass the respective energy store of the respectively adjacent module, in which the flexible interconnection of the modules is controlled by a battery control unit and hence a prescribed DC voltage V is provided.

A working method of a modular uninterruptible power supply (UPS) includes: obtaining working parameters of the modular UPS, where the working parameters include an input voltage parameter, a load parameter, and a battery parameter; and adjusting a working mode of a power module in the modular UPS according to at least one of the working parameters of the modular UPS, so that not all power modules are in a same working mode, where the modular UPS includes K working modules, and 2≤K.

A method is provided for controlling electrical load on a power grid from a load facility using demand response. The method includes accessing memory storing computer-readable program code for decision analysis of a specified time interval for a demand-response (DR) event. The method also includes executing the computer-readable program code, via a processor, to cause an apparatus to at least make a decision to participate in or opt out of the DR event. This includes the apparatus receiving values of variables that describe occupancy and usage of the load facility for one or more time intervals. The apparatus applies the values to an algorithm that maps the variables to a decision to participate in or opt out of the DR event for the specified time interval. And the apparatus automatically notifies an operator responsible for the DR event of the decision at least when the decision is to opt out.

The converter circuit includes an inverter. The converter circuit receives DC power from a DC power supply (such as a solar cell or a storage battery unit), has the DC power converted into AC power by at least the inverter, and outputs the AC power to a load or a power grid. When acquiring information that two or more types of power curtailment causes have arisen, a control circuit makes the converter circuit limit power output to a maximum degree of power curtailment out of two or more degrees of power curtailment according to specifics of the two or more types of power curtailment causes.

Disclosed are a wireless device capable of being self-powered and an operating method thereof. The wireless device includes an energy harvesting module that generates electrical energy based on energy supplied from an outside, a power management module that generates a voltage based on the electrical energy provided from the energy harvesting module, a user input interface that includes at least one input device sensing an input of a user, and a communication module that transfers a command corresponding to the at least one input device to the outside based on the voltage provided from the power management module, in response to that the at least one input device is accessed by the user.

A method of determining the capability of a nonlinear aircraft power source includes accessing status values representing a current state of an energy storage system in an aircraft, accessing demand values related to expected power demands on the energy storage system, modeling an ongoing status of the energy storage system using the status values and the demand values to predict when one of the status values will reach a threshold value, and providing an output of a capability of the aircraft based on the status value reaching the threshold value.

A battery-operated device in one aspect of the present disclosure includes first to fourth current paths. A first end of the first current path and a first end of the third current path are connected to a first battery. A first end of the second current path and a first end of the fourth current path are connected to a second battery. A second end of the first current path is connected to a second end of the second current path. A second end of the third current path is connected to a second end of the fourth current path. The battery-operated device further includes a first switch on the first current path, a second switch on the second current path, a first rectifier on the third current path, and a fourth rectifier on the fourth current path.