An energy storage system according to an embodiment of the present disclosure is connected to a grid power source and a photovoltaic panel, and includes: a battery configured to store electric energy received from the grid power source or the photovoltaic panel in a direct current form, or to output the stored electric energy to one or more loads; a grid relay configured to connect or block a power path connected to the grid power source; and a load relay configured to connect or block a power path connected to the load, wherein the grid relay is turned off when an error occurs in the grid power source, and the load relay is turned off when a state of charge of the battery is lower than an off-reference value.

The present application relates to a power supply device and a power supply method for providing electric energy to a target system. The power supply device includes: a first controller which is configured to receive an external signal or instruction, and to generate a power supply control signal; and a first option switch which is configured to receive the power supply control signal, and to establish a connection between at least one energy storage module and the target system in order to selectively output electric energy to the target system with one or more predetermined voltage; wherein when the electric energy to be output by the power supply device is a first predetermined voltage, a first energy storage module of the at least one energy storage module is connected with the target system.

A back-up power supply system (1) is configured to supply electric power from an electric storage device (5) to loads (3) when a power supply (2) is defective. The back-up power supply system (1) includes a first voltage conversion circuit (6) configured to convert an output voltage of the electric storage device (5). The loads (3) include a first load (31) and a second load (32). The back-up power supply system (1) is configured to supply power from the electric storage device (5) to the first load (31) not via the voltage conversion circuit (6), and to supply electric power from the electric storage device (5) to the second load (32) via the voltage conversion circuit (6).

An internal charging system controls charging of a battery used to power an electronic device when an external power source is connected to the device. The internal charging system can charge a battery that has a higher operating voltage than the voltage provided by the external power source. While charging the battery from the external power source, an internal charge controller can operate and inhibit functions of the device to indicate to user that a charging operation is commencing, and to prevent operation of the device when the battery voltage is too low to support such operation.

An electronic control circuit with a backup energy source subassembly for an e-latch assembly and a method of operating the backup energy source subassembly are disclosed. The electronic control circuit includes a control unit including a computing module and a memory for electrically coupling to a plurality of sensors and to a main power source. The backup energy source subassembly is electrically coupled to the control unit for providing electrical energy to the electronic control circuit in response to one of a failure and interruption of the main power source. An output module is electrically connected to the backup energy source subassembly and to the main power source for driving an actuation group. The backup energy source subassembly includes a backup low voltage source and a boost-buck converter configured to selectively supply voltage to and selectively amplify voltage from the backup low voltage source.

In a control apparatus mounted in a vehicle supporting start-stop control, for controlling a power supply system, a target charge level setter variably sets a target charge level of a second rechargeable battery when an internal-combustion engine of the vehicle is operating. The target charge level setter sets the target charge level to a higher level as load current increases, and when setting the target charge level, performs at least one of subtracting a first load quantity indicative of a current that is supplied to first electrical loads from a detected value of the load current and adding a second load quantity indicative of a current that is supplied to second electrical loads to the detected value of the load current. The first electrical loads operate when the internal-combustion engine is operating, and the second electrical loads operate when the engine is not operating.

Embodiments of the present disclosure provide an electrical apparatus, a power supply system having the same and a method of manufacturing the electrical apparatus. The electrical apparatus includes a detecting circuit coupled to a generator and configured to detect a frequency of the generator. The electrical apparatus also includes a controller coupled to the detecting circuit and configured to receive a first signal indicating the detected frequency and adjust the frequency of the generator in response to determining that the detected frequency is out of a predetermined frequency range. In this way, an actively controlling of the changing rate of the power to and from generator may be achieved, if the generator frequency exceeds the configured limits.

An electrical distribution device includes at least one power controller that is connectable to at least one electrical body, at least one local controller used to interface at least one power controller with at least one external calculator, and at least one local power supply path for powering at least one power controller and each local controller. Each power controller and each local controller includes a local DC/DC-type converter for coupling to each local power supply path. The device also includes an energy reservoir coupled to each local power supply path and to the local converters of the power controllers and the local controller.

The invention relates to an energy supply circuit of electric components, in particular for a motor vehicle, having an accumulator, wherein a discharge monitoring circuit monitors the energy stored in the accumulator. If the energy stored in the accumulator falls below a threshold value, the discharge monitoring circuit switches off the energy supply at least of individual components, in particular of all components.

One method for remotely starting an engine of a vehicle includes notifying, from the vehicle, a remote user of the vehicle that a battery of the vehicle has a charge level below a predetermined threshold. This method includes remotely starting the engine to charge the battery with energy from the engine upon receiving from the user a confirmation to start the engine. Another method includes remotely starting the engine in response to a command, from the user, to start the engine for preconditioning the vehicle. This method assesses charge level of the battery following engine start and adjusts engine-on time and vehicle settings to prioritize battery charge maintenance versus preconditioning based on the charge level.