Abstract: A quick charger for a vehicle performs normal charging or quick charging depending on whether a device connected thereto supports quick charging. The quick charger includes: an input terminal receiving power from a vehicle; an output port configured to be connected to an electronic device and comprising a power port and a communication port; and a charging voltage changing module configured to convert a voltage of the power applied to the input terminal into a normal charging voltage or a quick charging voltage larger than the normal charging voltage, depending on a level of a voltage sensed at the communication port connected to the electronic device, wherein the electronic device is charged with the normal charging voltage at a normal speed and is charged with the quick charging voltage at a faster speed than the normal speed. With the above-described configuration, the quick charger can automatically perform normal charging or quick charging depending on the type of the electronic device connected thereto.

Abstract: An operating method for a dual-voltage battery of a vehicle includes a plurality of battery cell blocks and a battery electronic system with a plurality of power switching elements for optionally connecting individual, in any case individual battery cell blocks, in parallel and/or in series, wherein a first battery cell block and at least one additional battery cell block of a group of battery cell blocks are connected in parallel in a first connection arrangement in order to provide a first voltage and in series in a second connection arrangement in order to provide a second voltage, wherein a parallel connection switch and a series connection switch are associated with the first battery cell block of the group of battery cell blocks to produce the parallel and/or series connection.

Abstract: According to various embodiments, an electronic device comprises a battery, a wireless interface including a coil and configured to wirelessly transmit electric power from the battery via the coil, and at least one processor configured to: perform a wireless charging function of wirelessly transmitting electric power to an external device via the wireless interface, while neither the electronic device nor the external device is being supplied with electric power from an external power source via a wire, and based on identifying that the external device starts being supplied with electric power from an external power source via a wire while performing the wireless charging function, stop performing the wireless charging function of wirelessly transmitting electric power to the external device.

Abstract: A method of diagnosing an electrical energy storage apparatus includes exciting at least one energy storage system in the electrical energy storage apparatus; sampling data associated with an electrical characteristic of the at least one energy storage system in response to the excitation of the at least one energy storage system; and estimating at least one electrical parameter and/or at least one operational condition attribute of the at least one energy storage system.

Abstract: A power receptacle including an outlet configured to electrically connect to a load device and an electronic processor. The electronic processor is configured to determine a state of charge of a battery of the load device. The electronic processor is further configured to supply power to the load device when the state of charge of the battery is below a predetermined threshold and to discontinue supply of power to the load device when the state of charge of the battery is at or above the predetermined threshold.

Abstract: A battery capacity translator (209) includes an input (301), an output (302), and a conversion circuit (305) coupled between the input and the output. The conversion circuit receives stored energy capacity information (701,702) corresponding to one or more energy storage cells of a first type at the input, and converts the stored energy capacity information to modeled stored energy capacity information (703) corresponding to one or more other energy storage cells of a second type. This modeled stored energy capacity information is delivered to the output to emulate the energy storage cells of the second type in legacy systems.

Abstract: A portable power source includes a housing and a battery receptacle supported by the housing. The battery receptacle is configured to receive a battery. The portable power source also includes a first power tool battery pack port that is configured to receive a first power tool battery pack. The portable power source further includes a charging circuit coupled to the battery receptacle and the power tool battery pack, and an inverter. The charging circuit is configured to receive power from the battery receptacle and to provide power to the power tool battery pack port. The inverter includes a DC input coupled to the battery receptacle, inverter circuitry, and an AC output. The inverter circuitry is configured to receive power from the battery receptacle via the DC input, invert DC power received from the battery receptacle to AC power, and provide the AC power to the AC output.

Abstract: An exemplary charging system includes, among other things, a first portable charger that electrically couples to an electrified vehicle to charge a traction battery of the electrified vehicle while a second portable charger is providing electrical energy to charge the traction battery. An exemplary charging method includes, among other things, electrically coupling both a first and a second portable charger to an electrified vehicle to charge a traction battery of the electrified vehicle using electrical energy from both the first and the second portable chargers.

Abstract: In general, techniques are disclosed for efficiently transferring power from a portable power bank to an electronic device. More particularly, a disclosed power bank incorporates a switching mechanism capable of routing battery voltage (novel) or a stepped-up voltage (e.g., from a boost regulator) directly to a common portion of an output connector. In addition, electronic devices as described herein also incorporate a switching mechanism to allow them to accept direct battery output (novel) or a stepped-up voltage at a common portion of the device's connector (e.g., a USB connector). When used in combination, the disclosed portable power bank can transfer power to the electronic device with no more than half the loss attributable to voltage conversion operations of the prior art.

Abstract: A battery cell housing and control system enables the use of liquid battery power systems in various applications, including downhole environments. The cell housing includes a plurality of conductive terminals spaced there-around to provide conductivity between the electrochemical solution and the load. Sensors provide orientation data to the control system to thereby determine which terminals should be activated to provide power to a load.

Abstract: A battery includes: a casing that includes a plurality of exterior faces having outer faces facing mutually-different directions and has an arrangement concave part formed; a cell that is housed inside the casing; and a connector that includes a connection terminal connected to an electrode terminal of a connection apparatus and is arranged in the arrangement concave part, in which a face forming the arrangement concave part of the casing is formed as a concave part forming face, and the concave part forming face is present between the exterior faces and the connector.

Abstract: An electric vehicle charging circuit includes a first power converting circuit configured to provide an output current to charge an electric vehicle, a power storage device, and a second power converting circuit electrically coupled between the power storage device and a bus, and configured to bi-directionally transmit power between the storage device and the bus. The first power converting circuit includes an AC/DC converter configured to convert an AC voltage to a bus voltage to the bus, and a DC/DC converter electrically coupled to the AC/DC converter at the bus and configured to output the output current. The second power converting circuit includes an isolated bidirectional converter.

Abstract: A fuel cell module is configured or operated, or both, such that after a shut down procedure a fuel cell stack is discharged and has its cathode electrodes at least partially blanketed with nitrogen during at least some periods of time. If the fuel cell module is restarted in this condition, electrochemical reactions are limited and do not quickly re-charge the fuel cell stack. To decrease start up time, air is moved into the cathode electrodes before the stack is re-charged. The air may be provided by a pump, fan or blower driven by a battery or by the flow or pressure of stored hydrogen. For example, an additional fan or an operating blower may be driven by a battery until the fuel cell stack is able to supply sufficient current to drive the operating blower for normal operation.

Abstract: A consumption device may be detected by a processor. At least one property of the consumption device may be determined. Based on that property, a power configuration for the consumption device may be determined. The processor may permit a finite electrical cell associated with the processor to power the consumption device according to that power configuration.

Abstract: An embodiment relates to a method for predicting a voltage dip in a vehicle electrical system before a planned start of a load in a motor vehicle. The embodiment operates to ascertain a value of supply current expected to be required after the start of the load. An electrical voltage source and an energy store connected in parallel to a voltage source via the vehicle electrical system provide the supply current for operating the load. The energy store blocks a charge current into the energy store or blocks a discharge current out of the energy store based on a vehicle electrical system voltage of the vehicle electrical system being greater than a maximum value. Based on an instantaneous value of the vehicle electrical system voltage, the embodiment further ascertains a proportion of the supply current that the voltage source generates as a source current without the energy store until the vehicle electrical system voltage has fallen to the maximum value.

Abstract: A charge management system including a power distribution bus circuit for distributing energy from a power source to a load, and an intermediate energy storage circuit operably connected to a power distribution bus circuit for aiding in distribution of energy to the load. A charge management system controller may be configured to control the discharge of energy between the intermediate storage circuit and the power distribution bus circuit during one or more modes. Such a charge management system may enable the power distribution bus circuit to receive energy from the intermediate energy storage circuit before the power bus voltage drops in response to load demand, which may enable the power source to respond to perturbations in the power bus voltage and minimize inrush current from the power source. The system also may be used to soft-start high-power equipment, or absorb energy spikes associated with shut-down.

Abstract: A charging detection and control apparatus for an Apple device, including: a charging input interface, a detection apparatus, a control apparatus and a charging output interface. An input terminal of the detection apparatus is connected to a charging source terminal via the charging input interface, an output terminal of the detection apparatus is connected to an input terminal of the control apparatus, an output terminal of the control apparatus is connected to the Apple device via the charging output interface, the detection apparatus detects a capacity for charging current of the charging source terminal inserted into the charging input interface, and outputs a detection result to the control apparatus, the control apparatus converts the received detection result into a charging parameter complying with Apple standards, and sends the charging parameter to the Apple device via the charging output interface.

Abstract: A power supply system that can suppress battery performance degradation due to deposition is provided. Among two battery packs (101, 102) for which it is determined whether a parallel connection is to be made, a specific battery characteristic regarding a charging battery pack (102) that is a battery pack having the lower voltage is calculated. Then, it is determined whether the battery characteristic matches an allowance condition, and it is determined whether the two battery packs (101, 102) are to be connected in parallel to each other. In addition, at least one of the battery characteristic and the allowance condition changes in accordance with a voltage of the charging battery pack (102).

Abstract: The present invention reduces the possibility that parallel connection is not allowed at the time of reactivation. A plurality of battery packs (11, 12) connected in parallel each include a chargeable-dischargeable battery string (21, 22), relays (41, 42) provided in series to the battery string (21, 22), and a detection unit that detects the state of the battery string. A master control unit (34) that controls the battery packs turns off the relays of the battery packs when a circulating current falls below a cancel-allowing current and, on the basis of a result obtained by the detection unit, makes the cancel-allowing current smaller as the SOC-equivalent value of the battery pack into which the largest amount of the circulating current flows increases.

Abstract: The present disclosure provides a protective case for a mobile terminal, the protective case including: a mobile terminal case which has a box shape, and surrounds and protects a mobile terminal; an auxiliary battery case which is positioned outside a rear surface of the mobile terminal case, and defines a space for accommodating an auxiliary battery; a mobile terminal side contact terminal which is disposed on an inner surface of the mobile terminal case, and is in electrical contact with an external terminal of the mobile terminal; and an auxiliary battery side contact terminal which is disposed on an inner surface of the auxiliary battery case, and is in electrical contact with an external terminal of the auxiliary battery, in which electric power of the auxiliary battery is provided to the mobile terminal through a connecting cable that electrically connects the mobile terminal side contact terminal and the auxiliary battery side contact terminal.

Abstract: A second energy storage has a second capacity deterioration factor which has a fluctuation with respect to a state of charge larger than a fluctuation of a first capacity deterioration factor. Circuitry is configured to control a converter to discharge one of the first energy storage and the second energy storage to charge another of the first energy storage and the second energy storage alternately when first temperature of the first energy storage and second temperature of the second energy storage are equal to or lower than a temperature threshold. The circuitry is configured to determine which of the first energy storage and the second energy storage is controlled to be discharged first based on the state of charge of the second energy storage, before the circuitry starts controlling the converter.

Abstract: A method of creating an interconnected combination of a stored energy electric generation system to a variable electric power generation system, said combination, and a method of operating same. A stored energy electric generation system is added to a variable output electric power generation system. An input/output of the stored energy electric power generation system is connected to a power output of the variable electric power generation system and an indicator of power flow level through the power input/output of the stored energy electric power generation system is provided to a controller of the variable electric power generation system. The controller is configured to adjust the output power of the variable electric power generation system based on the indicator of the present stored energy system electric power flow level and a present site output electric power level.

Abstract: In a power supply control device, a microcomputer controls the supply of power from a battery to loads via a battery conductor by individually switching on and off switches. While power is being supplied from the battery to the microcomputer, current flows from the positive electrode of the battery to a battery terminal, the battery conductor, a diode, a resistor, a regulator, the microcomputer, an intermediate conductor, a fuse portion, a GND conductor, and a GND terminal in this order. If a current greater than or equal to a predetermined current flows to the fuse portion, the fuse portion breaks.

Abstract: There is provided a wireless power transmission module for a vehicle that includes a housing providing an internal space and including an upper plate on which a portable device to be charged is placed, an antenna unit including a first wireless power transmission antenna operating in a magnetic induction method and a second wireless power transmission antenna operating in a magnetic resonance method, and a shielding unit including a first shielding sheet disposed in an area corresponding to the first wireless power transmission antenna and a second shielding sheet disposed in an area corresponding to the second wireless power transmission antenna. The antenna unit is placed inside the housing so that a first distance from the first wireless power transmission antenna to an outer surface of the upper plate is shorter than a second distance from the second wireless power transmission antenna to the outer surface of the upper plate.

Abstract: A power supply terminal, and a charging control method are disclosed. The power supply terminal includes a USB port, a switch, a power source module, and a processor, where the USB port is configured to connect to a power receiving terminal; one end of the power source module is connected to a power source pin VBUS of the USB port and is configured to charge the power receiving terminal by using the power source pin VBUS; a first end of the switch is connected to the data pin D+ and a second end of the switch is connected to the data pin D?; when the switch is on and the processor detects that a drop amplitude of the output voltage of the power source module exceeds a preset value, in a process in which the power source module outputs a voltage to charge the power receiving terminal.

Abstract: A control system for an electrified vehicle having low and high voltage battery systems includes a set of vehicle modules that collectively draw an ignition-off draw (IOD) current from the low voltage battery system while the vehicle is off, a set of sensors configured to measure a set of parameters of at least one of the low and high voltage battery systems, and a controller configured to: estimate the IOD current, receive the set of measured parameters from the set of sensors, based on the set of measured parameters and the estimated IOD current, set a wakeup time indicative of a future time at which the low voltage battery system will require recharging, and based on the wakeup time, temporarily wakeup the vehicle such that recharging of the low voltage battery system using the high voltage battery system is enabled.

Abstract: A mobile phone case includes an integrated charging and data communication apparatus, thereby forgoing the need to carry a separate charging and communication cable. The mobile phone case further includes an integrated cable storage compartment for storing the charging and data communication apparatus. The charging and communication apparatus includes a circuit board for electrically connecting a USB connector and a Lightning connector. A first flat cable has one end connected to the USB connector and the other end connect to the circuit board. A second flat cable has one end connected to the Lightning connector and the other end connected to the circuit board to provide electrically connection between the USB connector and the Lightning connector. The storage compartment further includes a USB side slot, a Lightning bottom slot, and a lid for opening and closing the storage compartment.

Abstract: A power interface ensemble includes an article-carrying tool exemplified by a bag or similar other carrying case having an interface opening formed in an exterior surface plane thereof. A power source or battery is disposed within the bag or carrying case, and a particularly configured power interface module is adapted to be electrically coupled to the battery or power source. The power interface module may include an interface input port for connecting to an external power source and an interface output port for connecting to an electronic device. The power interface module is positioned at the interface opening of the article-carrying tool or bag such that the input port and the output port are accessible from an exterior of the bag. The power interface module is particularly contoured externally for protecting the input and output ports and is particularly contoured internally for directing electrical connectivity to the power source.

Abstract: An information handling system may have multiple batteries and be powered by any one or combination of those batteries. The multiple batteries may be in different detachable portions of the system. When the portions are attached, a battery in one unit connects through multiple input paths to provide power to the other unit. Under a heavy loading condition, power may be drawn from a first battery while power from a second battery is routed to an external power input of the information handling system to supplement power drawn from the first battery.

Abstract: A fast charging high energy storage capacitor system jump starter is described. The jump starter apparatus incorporates a method of using extracted energy from a battery pack, such as a battery pack used with a portable power tool. The extracted energy is stored at a higher DC potential level by the capacitor system after being boosted or stepped up by a boost/convertor circuit. The stored energy is then available for use in starting a motor vehicle whose vehicle battery as become depleted such that it does not provide enough energy for its intended purposes. The disclosed system and method provide for the motor vehicle battery, combined with a fast charging high energy capacitor bank, to enable the rapid and effective way to jump start a vehicle.

Abstract: A converter circuit is disclosed. The converter circuit includes a transformer and a primary circuit connected to the primary side of the transformer, where the primary circuit includes a first switch connected to a ground. The converter circuit also includes a second switch connected to the first switch, and a clamping capacitor connected to the second switch and to the input. The converter circuit also includes a secondary circuit connected to the secondary side of the transformer, where the secondary circuit includes a secondary capacitor, an inductor, and a bypass element in parallel with the inductor.

Abstract: A lock portable charging apparatus includes a case defining an interior area that is enclosed and a locking device situated in the case. A shackle assembly is operatively coupled to the locking mechanism and is functional to selectively secure the case to a support structure. The case defines a key inlet for receiving a key in to operate the lock mechanism. A battery, processor, and memory storing programming are situated in the case. A primary and auxiliary USB port are positioned on the case and electrically connected to the battery for receiving AC power to recharge the battery and share battery power with other electronic devices, respectively. A GPS module is in the case for determining a global location of the case. A solar cell is included to provide electrical current to the battery. Programming is included to locate a mobile phone associated with the case.

Abstract: A compact, decorative and multi-functional portable power charger and cable apparatus includes a portable charger unit with a housing where the housing encloses an internal rechargeable battery unit for connecting to and recharging one or more electronic devices, and a charging cable extending from the charger housing and in operative communication with the rechargeable battery. At least the charger housing is surrounded by an aesthetic feature, which can comprise a tasseled fitting, a puffball, a luggage tag, or a doll or teddy bear to hide the charger unit. Electrical fittings including power connection interfaces for connecting the charger and cable apparatus with at least one electronic device, or an external power source, or both, can be provided on the charging cable and also hidden by the aesthetic feature. The power charger and cable apparatus can be attached to a fashion accessory, such as a purse, a bag, luggage or clothing.

Abstract: A switching arrangement for discharging an energy storage device of a motor vehicle including an energy storage device that stores electrical energy and supplies an electrical machine of a motor vehicle, a discharging circuit having a discharging resistor, a voltage comparison element and an activation switching device. The activation switching device starts discharging the energy storage device via the discharging resistor at the end of a delay period after the motor vehicle has been switched off. The voltage comparison element compares the prevailing voltage of an energy storage voltage and a voltage threshold value and terminates the procedure of discharging the energy storage device if the prevailing voltage of the energy storage device is less than or equal to the voltage threshold value.

Abstract: A power switch and a semiconductor device thereof are disclosed. The power switch device includes a first transistor cell, a second transistor cell, a body region and a conductive layer. The first transistor cell includes a first electrode. The second transistor cell includes a second electrode. The body region is disposed between the first transistor cell and the second transistor cell. The conductive layer is electrically connected with the body region, the first electrode and the second electrode respectively.

Abstract: A portable drone battery charger that charges a variety of batteries of different capacities as well as voltage levels is provided. The drone battery charger operates from an internal battery and may charge a drone battery multiple times because the capacity of the drone battery charger internal battery is many times larger than the done battery.

Abstract: An example apparatus for powering a mobile device display includes a first voltage regulator electronically to be electronically coupled to a display backlight and to a power rail. The power rail is coupled to a power source to provide a first voltage within a first range of voltages. The first voltage regulator is to provide a second voltage within a second range of voltages to the display backlight. The apparatus also includes a second voltage regulator to be electronically coupled to display electronics of the mobile device display and the power rail. The second voltage regulator is to provide a third voltage within a third range of voltages to the display electronics. The first range of voltages, the second range of voltages, and the third range of voltages, are different voltages.

Abstract: A system for a rechargeable battery pack includes one or more lower voltage cells connectable to a charging circuit via a lower voltage terminal and one or more higher voltage cells electrically coupled in series to the one or more lower voltage cells via a bi-directional charge regulator. A higher voltage terminal is electrically coupled to the one or more higher voltage cells, and a common ground terminal is coupled to the one or more lower voltage cells and to the one or more higher voltage cells.

Abstract: A charge control apparatus includes a control device configured to execute a refresh charge to fully charge a battery upon a predetermined refresh charge start condition being met, and execute a predetermined control according to a vehicle travel state under a situation where the control device does not execute the refresh charge, the predetermined control involving at least one of charging and discharging the battery. The control device suppresses the refresh charge when the control device detects at least one of a predetermined input from an external device and a predetermined vehicle operation.

Abstract: 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.

Abstract: A Service Provider (SP) includes a controller that instructs several Producers (provide the electric energy) and Consumers (consume the electric energy) about the electrical energy. The controller selects one of the Producers as an Active Producer (AP) that provides a predetermined volume of the electric energy, one of a remainder of the Producers as a Passive Producer (PP) that adjusts a volume of provided electric energy to be, one of the Consumers as an Active Consumer (AC) that consumes a predetermined volume of the electric energy, and one of a remainder of the Consumers as a Passive Consumer (PC) that adjusts a volume of consumed electric energy, and the controller instructs one of Passive Subscribers (either the PP or the PC) to adjust the electric energy, so as to mitigate a difference between a total supply volume and a total demand volume.

Abstract: A switching power supply apparatus is provided which reduces the time of application of an input voltage to a choke to suppress a peak current flowing through switch elements when a primary or secondary voltage is 0 V (or a voltage near 0 V). A DAB converter or switching power supply apparatus performs phase control to change at least either a first conduction width or a second conduction width of pairs of diagonally-arranged switch elements, constituting a primary full bridge circuit. The first conduction width is a time width in which a pulse for driving the first switch element and a pulse for driving the fourth switch element overlap temporally. The second conduction width is a time width in which a pulse for driving the second switch element and a pulse for driving the third switch element overlap temporally.

Abstract: In one embodiment, an eyewear for a user includes an eyewear frame, electrical circuitry at least partially in the eyewear frame, and a touch sensitive input surface on the eyewear frame configured to provide an input to the electrical circuitry to perform a function via touching the touch sensitive input surface. In another embodiment, the eyewear includes a switch with at least two operational states. The operational states of the switch can be configured to be changed by sliding a finger across the touch sensitive input surface of the frame.

Abstract: An apparatus, such as a user device, can comprise a battery, a plurality of antennas, a transceiver, a charging pad interface, and a controller. The battery can be configured to power the user device. The plurality of antennas can be configured to send and receive signals to and from a wireless node. The transceiver can be configured to communicate, via the plurality of antennas, with the wireless node. The charging pad interface can be configured to detect that the apparatus is coupled to a charging pad and to receive charging power from the charging pad. The controller can be configured to change a configuration of at least one antenna from the plurality of antennas in response to the charging pad interface detecting that the apparatus is coupled to the charging pad.

Abstract: Various embodiments of a biocompatible, self-rechargeable bio-fueling micro battery with a glucose burning chamber, are disclosed herein, to power an implanted medical device. The micro battery comprises a bio-membrane that is configured to diffuse a plurality of bio-fluids across an anode and cathode electrode. The bio-membrane includes: a biocompatible compartment storing at least one of a chemical substance configured to operate a plurality of bio-medical implant devices; one or more bio-fuel compartments (blood, glucose, and/or microbial) configured to store bio-fuels for generating electrolyte and to create a conductive path for electrons emitted by electrodes; and a processor in communication with the biocompatible compartment through plurality of connectors interface with the one or more bio fuel compartments to control the communication between user and the bio medical implant devices. The biofluids comprise a lemon juice, an orange juice, a pineapple juice, and a sour juice; and/or an ingested food.

Abstract: An apparatus system is provided which comprises: a port to selectively receive a device external to the apparatus; a port control circuitry to selectively supply power to the port; and a controller to selectively turn on or turn off the port.

Abstract: The present disclosure relates to a quick charging method, a mobile terminal and a power adapter. The method includes: sending, by a mobile terminal, a first instruction indicating that the mobile terminal is operable under the quick charging mode to the power adapter through the at least one data line in the USB interface, the first instruction being configured for instructing the power adapter to adjust an output of the power adapter based on the received first instruction; and receiving, by the mobile terminal, a charging current delivered by the at least one power line and corresponding to the quick charging mode from the power adapter, so as to charge a battery in the mobile terminal.

Abstract: A charging integration system for a vehicle. The charging integration system includes a seat structure, a charging system carrier and a charging station structure. The charging system carrier is pivotably connected to the seat structure. The charging station structure is movably connected to the charging system carrier. The charging integration system allows one or more devices to be charged wirelessly or by a physical connector that connects the one or more devices to the charging station structure.

Abstract: A multifunctional data mobile power supply (01) and a charging method thereof are provided. The power supply includes a gear selection switch (02), a main control chip (03), a mobile power supply module (04) and an interface module (05). The gear selection switch is configured to select different operation modes for executing by an opening and/or closing operation. The main control chip is configured to detect a gear selection signal of the gear selection switch, and after the charging mode is selected, send an operation command to the mobile power supply module. The mobile power supply module is configured to charge an intelligent mobile terminal which the interface module is connected with after receiving the operation command. The interface module is configured to connect with the external device.

Abstract: A power supply device includes a power supply, a conversion module, and an electric current sensor, and circuitry. The power supply is to output a voltage that varies in accordance with an amount of electric power output from the power supply. The conversion module includes voltage converters electrically connected in parallel to convert the voltage to a target voltage. The electric current sensor is to detect current supplied from the power supply to the conversion module. The circuitry is configured to determine a number of operating voltage converters among the voltage converters, which are to actually convert the voltage, based on the current detected by the electric current sensor, the voltage, and a representative voltage representing a target range within which the target voltage is included.