Electronic device with wireless charging and battery heating
First Claim
1. An electronic device configured to receive wirelessly transmitted power signals from a power transmitting device, comprising:
- a substrate;
a battery mounted on the substrate;
a wireless charging coil formed on the substrate and configured to receive the wirelessly transmitted power signals;
a wireless power receiving circuit coupled to the wireless charging 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; and
a drive circuit coupled to the wireless charging coil, wherein the controller is configured to apply a signal to the wireless charging coil with the drive circuit that heats the battery.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
20 Citations
20 Claims
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1. An electronic device configured to receive wirelessly transmitted power signals from a power transmitting device, comprising:
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a substrate; a battery mounted on the substrate; a wireless charging coil formed on the substrate and configured to receive the wirelessly transmitted power signals; a wireless power receiving circuit coupled to the wireless charging 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; and a drive circuit coupled to the wireless charging coil, wherein the controller is configured to apply a signal to the wireless charging coil with the drive circuit that heats the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electronic device configured to receive wirelessly transmitted power signals from a power transmitting device, comprising:
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a battery; a wireless charging coil configured to receive the wirelessly transmitted power signals; a wireless power receiving circuit coupled to the wireless charging coil, wherein the wireless power receiving circuit is configured to rectify the received wirelessly transmitted power signals and produce corresponding direct-current signals to charge the battery; and control circuitry that is configured to supply a signal to the wireless charging coil to heat the battery at least partly in response to determining that the battery is at a temperature below a threshold temperature, wherein the signal supplied to the wireless charging coil is a direct-current signal, and wherein the control circuitry includes a drive circuit coupled to the wireless charging coil that is configured to apply the direct-current signal to the wireless charging coil to ohmically heat the wireless charging coil and thereby heat the battery. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An electronic device, comprising:
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a battery; a wireless charging coil on a printed circuit that is configured to receive wirelessly transmitted power signals; a wireless power receiving circuit coupled to the wireless charging coil, wherein the wireless power receiving circuit is configured to rectify the received wirelessly transmitted power signals and is configured to produce a corresponding direct-current voltage that charges the battery; and control circuitry that is configured to supply a signal to metal traces overlapping with the wireless charging coil on the printed circuit and a signal to the wireless charging coil to heat the battery. - View Dependent Claims (18, 19, 20)
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Specification