Amazon Technologies, Inc.

Benjamin Thomas Gaide

Bryan Holmdahl

Ming Feng

Don Brunnett

Ramez Nachman

Donald Joseph Brunnett

Marko Bundalo

Mohammed Sameed Shafi

Systems, methods, and computer-readable media are disclosed for improved wireless battery charging. The device may include a battery, and may be configured to determine that the battery is de-coupled from a wireless charger at a first time, determine that the battery is coupled to the wireless charger at a second time, determine that a first elapsed time between the first time and the second time is equal to or less than a first threshold, and cause charging of the battery to be disabled for a first time duration.

Wireless battery charging

A device including a first receptacle for receiving a first electronic device, a second receptacle for receiving a second electronic device, a first switching charger for fast charging the first electronic device, and a second switching charger for fast charging the second electronic device. The device may determine that the first electronic device is communicatively coupled to the device within the first receptacle and that the second electronic device is communicatively coupled to the device within the second receptacle. The device may receive a first request from the first electronic device to fast charge the first electronic device via the first switching charger and charge the first electronic device via the first switching charger. Additionally, the device may receive a second request from the second electronic device to fast charge the second electronic device via the second switching charger and charge the second electronic device via the second switching charger.

Charging system for electronic devices

Systems, methods, and computer-readable media are disclosed for dynamic adjustments to battery parameters using battery metrics. The device may be configured to determine a first value indicative of a battery voltage output during a first time interval, determine a second value indicative of a temperature during the first time interval, and determine a first acceleration factor for the battery during the first time interval based at least in part on the first value and the second value. The device may determine an adjusted number of charge cycles completed during the first time interval using the first acceleration factor, determine a total adjusted number of charge cycles of the battery, determine that the total adjusted number of charge cycles is equal to or greater than a first threshold, and cause the first maximum output voltage value to be reduced.

Dynamic adjustments to battery parameters using battery metrics

Systems, methods, and computer-readable media are disclosed for battery-specific adjustments to maximum battery voltage. In one embodiment, an example device may include a battery, at least one memory that stores computer-executable instructions, and at least one processor. The device may be configured to determine a first value indicative of a first length of time the battery was at a first voltage and a first temperature, determine a second value indicative of a second length of time the battery was at a second voltage and a second temperature, determine that a sum of the first value and the second value satisfies a first threshold, and cause a maximum output voltage value to be reduced from a first maximum output voltage value to a second maximum output voltage value.

Battery-specific adjustments to maximum battery voltage

A device may utilize a cable that includes connectors and conductors to transfer signals, electrical power, or both. Some cable failures result in an inability to transfer signals. Other failures may result from different cables being used at different times, resulting in a mismatch in which the cable is rated to transfer less power than what could otherwise be delivered by the power source. Parameters, such as cable impedance, transmitter gain, signal conditioning, and so forth that are associated with use of the cable are monitored at different times. If the values of these parameters from one time to another exceed a threshold value, a fault in the cable is determined. A notification about the impending or actual failure of the cable may be presented, and a suitable cable may be recommended for purchase. For example, a hyperlink may be provided to allow for purchase of the suitable cable.

Automated cable assessment and control

A first device, such as a charger, includes electrical contacts to supply power to a second device, such as a wearable device. The first device includes a detection circuit that measures a sense voltage proportional to an effective resistance, which includes resistances of the contacts, an internal resistance of the second device, and any contaminants between the contacts. When the sense voltage is within a range, the detection circuit determines the second device is compatible and correctly oriented and determines there are insufficient contaminants to alter the effective resistance. The first device de-energizes the contacts while the sense voltage is outside of a voltage range and provides a power supply to one or more of the contacts when the sense voltage is within the voltage range. In some aspects, the detection circuit may delay the power supply for a period of time to avoid false detection events.

Dock device with circuit to detect charge pin alignment

A resettable battery input control apparatus includes disconnect circuitry that allows for a battery or other power source to be disconnected from a load in an electronic device. A processor, such as a power management integrated circuit, may assess operating data indicative of operation of the electronic device. If the processor determines a fault condition, the disconnect circuitry is activated. In the event that the processor itself fails, the disconnect circuitry will fail safe and disconnect the battery from the load. Once disconnected, the battery remains disconnected until external power is applied. In one implementation the disconnect circuitry may comprise a field-effect transistor acting as a low-side switch that operates to disconnect the negative terminal of the battery from the load.

Resettable battery disconnect device

This disclosure describes techniques for detecting and recovering from faults in computing devices. The faults being detected may consume amounts of power within normal consumption parameters of the device, such as under upper-current protection limits of a power adapter. The power adapter may include components which prevent power from being supplied to the device if the current drawn by the device is not periodically reduced to less than a threshold amount of current. The device may include logic which causes the device to periodically reduce the current drawn from the power adapter to less than the threshold amount of current to reset a timer of the components of the power adapter. Thus, the device may periodically reduce the current drawn when the device is operating normally, but fail to reduce the current drawn when experiencing a fault, which results in the power adapter shutting off power to the faulted device.

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San Jose, CA, United States of America

Benjamin Thomas Gaide