11-01-2018 дата публикации
Номер: US20180013311A1
Принадлежит:
A wireless power transmitting device may transmit wireless power signals to a wireless power receiving electronic device. The electronic device may have a coil that receives the transmitted wireless power signals and may have a power receiving circuit that rectifies the received wireless power signals to produce a corresponding direct-current voltage signal. The direct-current signal may be used to power circuitry in the electronic device and may be used to charge a battery in the electronic device. Control circuitry in the electronic device may use a temperature sensor to make temperature measurements. In response to detecting that the device is below a given threshold temperature and based on other information such as information on which applications are running on a controller in device, the device may supply drive current signals to the coil to heat the battery and improve battery performance. 1. An electronic device configured to receive wirelessly transmitted power signals from a power transmitting device , comprising:a battery;a coil configured to receive the wirelessly transmitted power signals;a wireless power receiving circuit coupled to the coil, wherein the wireless power receiving circuit is configured to produce direct-current signals from the received wirelessly transmitted power signals that charge the battery;a controller; anda drive circuit coupled to the coil, wherein the controller is configured to apply a signal to the coil with the drive circuit that heats the battery.2. The electronic device defined in further comprising:a housing; anda printed circuit having loops of metal traces that form the coil, wherein the printed circuit is interposed between the battery and the housing.3. The electronic device defined in further comprising at least one temperature sensor claim 2 , wherein the controller is configured to gather temperature information with the at least one temperature sensor and is configured to apply the signal to the coil based at ...
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