Abstract: A method of wirelessly transmitting power includes: causing a power transmission circuit to transmit, to a master power reception circuit, a portion of power it is capable of transmitting; adjusting operation of a slave power reception unit until a first rectified voltage produced by the master power reception circuit and a second rectified voltage produced by the slave power reception unit are equal; causing the power transmission circuit to transmit additional power to the slave power reception unit, resulting in the first and second rectified voltages being unequal; and adjusting operation of the slave power reception unit until the first and second rectified voltages are again equal. A dummy load is connected to the slave power reception unit prior to causing the power transmission circuit to transmit the additional power, and is disconnected once the first and second rectified voltages are equal.

Abstract: A wireless power transfer system comprises at least one power receiver (105) for receiving a power transfer from the power transmitter (101) via a wireless inductive power transfer signal. Configurers (207, 306) of the power transmitter and receiver may perform a configuration process to determine a set of power transfer parameter values which are used in a first power transfer. The power transfer parameter values and a first identity for the first power receiver (105) are stored. After a detection of an absence of the power receiver by a first controller (211), a detector (213) may detect a presence of a candidate power receiver. If the candidate power receiver is detected within a given duration and has an identity matching the first identity, an initialization processor (215) initializes a second power transfer using the set of stored parameter values. Otherwise it discards the set of stored parameter values.

Abstract: A power supply system includes at least two power supply devices that supply a current to a load. Each of the at least two power supply devices includes a converter configured to generate a current that is to be supplied to the load, an FET that is connected in series between the converter and the load, a gate voltage monitoring circuit configured to monitor whether a gate voltage of the FET has fallen below a predetermined first reference voltage, and an alarm generation circuit configured to generate an alarm according to a result of monitoring by the gate voltage monitoring circuit.

Abstract: A system may be provided that may include a first battery, and an inverter coupled to the battery. The system may also include a first active filter including a first switch element, second switch element, third switch element, and fourth switch element. Each switch element may be coupled to the first battery or the inverter. The first, second, third, and fourth switch elements may be configured to increase or decrease an applied voltage or current of the first battery.

Abstract: Power supply system mounted in electric vehicle includes voltage measurement unit that measures a voltage of each of a plurality of cells to ensure both safety of an electric vehicle and convenience of a user. Current measurement unit therein measures a current flowing through the plurality of cells. Temperature measurement unit therein measures a temperature of the plurality of cells. Controller therein determines a current limit value defining an upper limit of a current for suppressing cell deterioration and ensuring safety based on the voltage, the current, and the temperature of each of the plurality of cells measured by voltage measurement unit, current measurement unit, and temperature measurement unit respectively, and that notifies a higher-level controller in electric vehicle of the determined current limit value.

Abstract: A high-voltage hierarchy hundred-megawatt level (100 MW) battery energy storage system and optimizing and control methods are provided. The system includes a multi-phase structure, of which each phase is divided into multi-story spaces from top to bottom. A battery module is provided in each story of the multi-story spaces. The battery module is connected to a DC terminal of an H-bridge converter, and each phase is cascaded by the H-bridge converter. A capacity of the single-phase energy storage apparatus of the present invention is large, and multiple phases can be connected in parallel to form a 100 MW battery energy storage power station. The power station has the advantages of simple structure, easy coordinated control, low control loop model and coupling, and optimal system stability. The control system of the present invention has fewer hierarchies, a small information transmission delay, and a rapid response speed.

Abstract: A vehicle control unit (e.g., a control unit for an automobile) receives feedback from an intelligent voltage/current sensor and a DC/DC controller. The DC/DC controller comprises a first switch for controlling power from a primary power source (e.g., low voltage power supplied from a high voltage battery). The intelligent voltage/current sensor senses power output from the primary power source. The vehicle control unit processes feedback from the intelligent voltage/current sensor and/or the DC/DC controller to determine if a failure has occurred in the primary power source. In response to determining the failure in the primary power source, the vehicle control unit disables the power from the primary power source using a second switch (e.g., a switch in a relay).

Abstract: A wireless power transfer system includes an antenna base having a charger surface configured substantially as a concave spherical section and a first antenna comprising a spiral wire coil conforming to the charger surface of the antenna base. A target item includes an interface surface configured as a convex spherical section substantially matching the concave spherical section of the charger base. A second antenna is located within the target item and adjacent to the interface surface such that when the target item is placed in the antenna base with the interface surface mated to the charger surface, the first and second antennas are within inductive coupling range for wireless power transfer between the antennas.

Abstract: Eyewear that is configured to be wirelessly charged and also wirelessly communicate with a case charger having a battery using time gating power transfer. In one example, wireless charging and bidirectional communication of the eyewear can be performed using a unidirectional communication protocol, such as the Qi baseline power profile (BPP) which is only suited for unidirectional communication. The eyewear has a processor configured to send data to the wireless power charger that instructs the wireless power charger to stop wireless charging for a time period that is correlated to a state of charge (SOC) of the wireless power charger battery. The wireless power charger resumes charging of the eyewear battery after the time period, and the eyewear determines the SOC of the wireless power charger battery to be a percentage that correlates to the time period.

Abstract: A wireless electrical power supply apparatus 100 includes a first electrical power supply unit 101, a second electrical power supply unit 104, voltage control circuits 113 and 123 configured to control a first voltage difference between a first input voltage E1 and a first output voltage E2 during forward power transmission and a second voltage difference between a second input voltage E2 and a second output voltage E1 during reverse power transmission, a second switching control circuit 121, 122 configured to turn off a second transistor Q2 during the forward power transmission and thereby cause a second diode D2 to perform rectification, and a first switching control circuit 111, 112 configured to turn off a first transistor Q1 during the reverse power transmission and thereby cause a first diode D1 to perform rectification.

Abstract: An Inductive Power Transfer System pickup provides a controlled AC power supply by controlled variation of the phase angle between the pickup coil induced voltage (jwMI) and the tuning capacitor C voltage. The phase angle can be varied by maintaining the tuning capacitor C voltage substantially constant for a selected time period. Switches S1 and S2 may be used to clamp the tuning capacitor C voltage at substantially zero volts during the selected time period. Switch S1 can be operated to prevent a rise in positive voltage across the tuning capacitor, and switch S2 can be used to prevent the voltage across the tuning capacitor from going negative.

Abstract: An example operation includes one or more of determining, by a transport, an energy transfer condition exists along a route, routing, by the transport, to a location on the route based on the energy transfer condition exceeding an energy transfer value and based on one or more traffic conditions, aligning, by the transport, a position of the transport at the location to wirelessly receive an energy transfer, and receiving, by the transport, the energy transfer while the transport is in motion.

Abstract: Provided is an operating state display method in an electric vehicle in which the drive electric power is supplied from a battery to a travel motor. The operating state display method includes an eco-level setting step of setting an eco-level with respect to an operating state of the electric vehicle based on a vehicle speed of the electric vehicle and an output of the travel motor, and a display step of displaying in a vehicle cabin an eco-level gauge configured to expand or contract according to the eco-level.

Abstract: Provided are a wireless charging control method, a charging control device and a device to-be-charged. The method includes: according to an output voltage of a wireless receiving circuit, determining whether a power of a wireless charging signal received by the wireless receiving circuit can meet a charging power currently required by a battery; and when the power of the wireless charging signal fails to meet the charging power currently required by the battery, reducing the charging power currently required by the battery. In the embodiments, the output voltage of the wireless receiving circuit serves as the basis for determining whether the power of the wireless charging signal can meet the charging power currently required by the battery; and the difference between the charging power received by and required by the battery is decreased by reducing the charging power currently required by the battery.

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: The present disclosure provides methods and circuits of multi-output hybrid voltage regulators that generate multiple lower level DC voltages lower than the magnitude of an input voltage provided to an input node of the regulator. The disclosed methods and circuits can be applied to today's Large conversion ratio DC-DC converters that allow them to support same power conversion functionality for multiple output voltages with one core switched capacitor network sharing passive components and switches with less voltage ratings, and therefore, reduce the implementation space to save cost as well as improve efficiency. Sample applications include, but are not limited to, PoL converters for data centers and telecommunication systems with better efficiency and compactness for higher conversion ratio.

Abstract: A power transmitter may send a digital ping to a receiver. The power transmitter may transfer power to the receiver. The power transmitter may receive a report from the receiver which may comprise a received power value. The power transmitter may determine a transmitted power parameter value, which may be based on a threshold value subtracted from a transmitter power and based on transmitter losses subtracted from the transmitter power. The power transmitter may determine that the received power value is less than the determined transmitted power parameter value and may send an analog ping to the receiver in response to a determination that the received power value is less than the determined transmitted power parameter value. The power transmitter may measure a decay pattern of the analog ping. The power transmitter may determine that the receiver comprises a friendly foreign object. The power transmitter may update the threshold value.

Abstract: This disclosure provides systems, methods and apparatus for an energy storage system. In one aspect, the energy storage system includes a controller configured to connect a first capacitor system and a second capacitor system in series with an output of a battery system during a high current demand event such that the voltage of the output of the battery system is supported within the voltage constraints of the output of that battery system.

Abstract: A power transmitter includes a control and communications unit, an inverter circuit, a coil, and a shielding. The control and communications unit is configured to provide power control signals to control a power level of a power signal configured for transmission to a power receiver, provide a power timing request to an external power supply, and determine if the timing of the external power supply is compliant if the power timing request is met within a timing interval. The coil is configured to transmit the power signal to a power receiver, the coil formed of wound Litz wire and including at least one layer, the coil defining, at least, a top face. The shielding comprises a ferrite core and defining a cavity, the cavity configured such that the ferrite core substantially surrounds all but the top face of the coil.

Abstract: A surface mountable housing for a power transmitter for wireless power transfer includes a connector system configured for use to mount, at least, a transmitter antenna to an underside of a structural surface, such that the transmitter antenna is configured to couple with a receiver antenna of a power receiver when the receiver antenna is proximate to a top side of the structural surface. The surface mountable housing further includes a heat sink, the heat sink configured to rest, at least in part, below the transmitter antenna, when the power transmitter is connected to the structural surface, and configured to direct heat generated by the power transmitter away from the structural surface, and an antenna housing, the antenna housing substantially surrounding a side wall of the transmitter antenna, the antenna housing connected to the heat sink and positioned between the heat sink and the structural surface.