Disclosed is a system for transmitting/receiving wireless power, the system includes a wireless power transmitter including an inverter that generates a first current using an input power source, a first resonant circuit to which the first current is applied to transmit a power signal, and a first controller that controls the inverter, and a wireless power receiver including a second resonant circuit that receives the power signal, an impedance varying unit that varies an impedance of the second resonant circuit, and a second controller that controls the impedance varying unit, wherein the first controller controls the inverter to spread a frequency spectrum of the power signal, and the second controller controls the impedance varying unit such that the second resonant circuit resonates with the power signal generated from the first resonant circuit of the wireless power transmitter. Additional various embodiments recognized through the specification are possible.

An induction charging device for an electrically operated vehicle may include a sub-surface protection, a shield element, and an induction charging module. The shield element may include a recess. The sub-surface protection may include a receiving area. The recess and the receiving area may define an insertion area in which the induction charging module is arranged.

A wireless charging system for recharging batteries in a medical environment includes a charging station. The charging station may include an opening to receive batteries and an outlet for dispensing charged batteries, wherein the outlet comprises a slot in a front cover. The charging station also includes a wireless power transmitter having a transmitting antenna.

A wireless charging system for recharging batteries in a medical environment includes a charging station. The charging station may include an opening to receive batteries and an outlet for dispensing charged batteries, wherein the outlet comprises a slot in a front cover. The charging station also includes a wireless power transmitter having a transmitting antenna.

A manhole cover and a manhole management system are provided. A manhole cover according to one embodiment includes: a cover body; an electronic unit including at least one sensing unit configured to sense information inside a manhole and at least one communication module configured to transmit information which is obtained through the sensing unit to the outside, and embedded in the cover body; a battery providing driving power to the electronic unit; and a wireless power reception antenna embedded in the cover body to receive wireless power supplied from the outside and provide the wireless power to the battery.

A device comprises a plurality of power converters, a resonator block and a connection block. The plurality of power converters is coupled to a power port having a voltage. Each power converter comprises a plurality of switch networks, and each switch network has a plurality of power switches. The resonator block comprises a plurality of resonators. Each resonator has a resonant capacitor and is coupled to one of the plurality of power converters. The connection block comprises a switching component and is coupled to one of the plurality of resonators, and the connection block and the said resonator are configured such that the device operates in a wireless charging mode with the resonator block activated or a wired charging mode with the connection block activated.

A power supply unit for an aerosol inhaler includes: a power supply capable of supplying power to a load capable of generating aerosol from an aerosol source; and a charger capable of controlling charging of the power supply, in which the power supply unit further includes: a power reception coil capable of receiving the power in a wireless manner, a converter configured to convert AC power into DC power, an AC conductive wire connecting the power reception coil and the converter, and a DC conductive wire connecting the converter and the charger and having a length equal to or greater than a length of the AC conductive wire.

A power supply unit for an aerosol inhaler includes: a power supply capable of supplying power to a load capable of generating aerosol from an aerosol source; and a charger capable of controlling charging of the power supply, in which the power supply unit further includes: a power reception coil capable of receiving the power in a wireless manner, a converter configured to convert AC power into DC power, an AC conductive wire connecting the power reception coil and the converter, and a DC conductive wire connecting the converter and the charger and having a length equal to or greater than a length of the AC conductive wire.

Embodiments of this application disclose a wireless charging system. The wireless charging system includes a first electronic device, a wireless charging device, and a second electronic device. The wireless charging device is located between the first electronic device and the second electronic device. The wireless charging device is an auxiliary device of the first electronic device and is physically connected to the first electronic device, the wireless charging device includes a receiver circuit and a housing, the receiver circuit includes a receiver coil, and the receiver coil is located on an inner side of the housing. The first electronic device is configured to: charge the wireless charging device, charge the second electronic device through the wireless charging device, and receive power from the second electronic device through the wireless charging device.

Embodiments of this application disclose a wireless charging system. The wireless charging system includes a first electronic device, a wireless charging device, and a second electronic device. The wireless charging device is located between the first electronic device and the second electronic device. The wireless charging device is an auxiliary device of the first electronic device and is physically connected to the first electronic device, the wireless charging device includes a receiver circuit and a housing, the receiver circuit includes a receiver coil, and the receiver coil is located on an inner side of the housing. The first electronic device is configured to: charge the wireless charging device, charge the second electronic device through the wireless charging device, and receive power from the second electronic device through the wireless charging device.