A wireless charging receiving apparatus includes a wireless charging conversion module, a charging management module, a voltage combination module and at least two wireless charging receiving coils. The at least two wireless charging receiving coils are used to couple with a wireless charging transmitting coil in a wireless charging transmitting apparatus and output alternating-current electromagnetic induction signals to the voltage combination module; the voltage combination module is used to carry out voltage superposition on the alternating-current electromagnetic induction signals output by the at least two wireless charging receiving coils and output superposed alternating-current electrical signals to the wireless charging conversion module; the wireless charging conversion module is used to convert received alternating-current electrical signals into direct-current electrical signals, and output the direct-current electrical signals to the charging management module; and the charging management module is used to charge a battery by means of received direct-current electrical signals.

Systems, methods and apparatus for wireless charging are disclosed. A charging device has a plurality of charging cells provided on a charging surface provided at a charging surface of the wireless charging device, and a controller. The controller may be configured to provide a charging current to at least one active transmitting coil in the charging surface, measure voltages across three or more transmitting coils in the charging surface and determine that the chargeable device is in motion across the charging surface based on changes in the voltages measured across the three or more transmitting coils. The charging current may cause a wireless transfer of power through the at least one active transmitting coil to a chargeable device located on the charging surface.

A case a portable listening device. The case includes a housing having an interior space to receive the portable listening device; a lid attached to the housing; a rechargeable battery and first and second wireless power receiving elements configured to receive electric charge from a wireless power transmitter during a charging event. The case further includes switching circuitry that is configured to disable one of the first or second wireless power receiving elements during a charging event when the disabled element is receiving power less efficiently than the other element.

A wireless charging positioning device and method, a receiver and a storage medium are provided. The device is applied to a transmitter and includes: at least one group of detection coils and at least one processor. Each group of detection coils includes N detection coils, detection regions covered by different detection coils are at least partially different, detection coil is configured to transmit a detection signal and receive a feedback signal sent by a receiver, and N is a positive integer greater than or equal to 2. The at least one processor is connected with the N detection coils and configured to determine a position region of the receiver at the transmitter according to the feedback signals received by the N detection coils.

A pad for wirelessly charging wireless products selected from the group consisting of wireless hair clippers, wireless air compressors, wireless hair curling iron, wireless hair styles, wireless hair trimmer, wireless hair dryer, wireless hair massager, wireless hair straightener, wireless hair brush, wireless razor, wireless hot hair brush, wireless nose trimmer, wherein said pad includes permanent charging ports and temporary charging ports, said permanent charging ports having charging coils embedded in the pad, said temporary charging ports inserted with wireless charging modules to provide wireless charging capability. The size, number and orientation of the permanent and temporary charging ports can vary depending on the users's need.

A wireless power system for an implantable device is described. The system includes multiple inductive charging coils to increase an effective area for receiving an electromagnetic charging field from a wireless charging device. The multiple inductive charging coils produce different alternating current signals in response to receiving the electromagnetic charging field. The system includes a rectifying circuit for rectifying the alternating current signals into direct current signals. The system also includes a current combination circuit for combining the multiple direct current signals into a single direct current for powering an operation of the implantable device. Methods and devices for implementing the power system in an implantable device are also described.

A method and apparatus are provided for determining, by a wireless power transmitter, whether a wireless power receiver is removed from a wireless power network managed by the wireless power transmitter. The method includes transmitting a command signal to report power information of the wireless power receiver at stated periods; determining whether a report signal corresponding to the command signal is received from the wireless power receiver; and determining that the wireless power receiver is removed from the wireless power network, if the report signal is not received after transmitting the command signal a predetermined number of times at the stated periods.

An example method is performed at a near-field charging pad with a processor, a power-transferring element, a signature-signal-receiving circuit, and the processor of the near-field charging pad is in communication with a data source that includes predefined signature signals that each identify one of (i) a wireless power receiver, (ii) an object other than a wireless power receiver, and (iii) a combination of a wireless power receiver and an object other than a wireless power receiver. The method includes: after sending a plurality of test radio frequency (RF) power transmission signals, detecting, using the signature-signal-receiving circuit, respective amounts of reflected power; generating, based on variations in the respective amounts of reflected power, a signature signal; and determining whether (i) an authorized wireless power receiver is present on the near-field charging pad and/or (ii) an object other than a wireless power receiver is present on the near-field charging pad.

A patient support apparatus for removably retaining differently-sized portable electronic devices. The patient support apparatus comprises a base, a litter with a patient support deck for supporting the patient, and a side rail. The side rail is coupled to the litter and arranged for movement relative to the base. The side rail includes a caddy comprising a back, a first brace, and a second brace spaced from the first brace. The first brace extends laterally from the back and defines a first bottom support region. The second brace extends laterally from the back and defines a second bottom support region converging toward the first bottom support region to arrange the first and second bottom support regions to provide differing points of contact for retaining differently-sized portable electronic devices.

An electronic device in a wireless power system may be operable with a removable accessory such as a case. The device may have coplanar power transmitting and power receiving coils. The transmitting coil may be positioned within a central opening of the receiving coil. The removable accessory may have an embedded receiving coil configured to receive wireless power from the transmitting coil of the electronic device. The receiving coil of the electronic device may receive wireless power from a power transmitting device such as charging mat. The receiving coil of the electronic device may operate up to a higher maximum power than the transmitting coil of the electronic device. The power transmitting coil and power receiving coil in the electronic device may operate at different power transmission frequencies. To mitigate crosstalk, the power transmitting coil's operation frequency may be a non-integer multiple of the power receiving coil's operation frequency.