A wireless power transfer system can include an electronic device including a first wireless power transfer coil and wireless power transfer circuitry coupled to the wireless power transfer coil. The wireless power transfer circuitry can be capable of receiving power and transmitting power wirelessly via the first wireless power transfer coil. The system can further include an accessory device including a second wireless power transfer coil, a rectifier coupled to the second wireless power transfer coil, and an energy storage device coupled to the rectifier by a regulator circuit. The wireless power transfer circuitry can operate in a pulsed or burst wireless power transfer mode to deliver power to the accessory device.

The disclosed computer-implemented method may include (i) detecting a battery condition of a wearable battery-operated device that indicates a threat to a battery's health and (ii) in response to detecting the battery condition, performing a battery-protection action by initiating a reverse power flow across a bidirectional connection from the wearable battery-operated device to a portable charging case that is designed to charge the wearable battery-operated device. Various other methods, systems, and computer-readable media are also disclosed.

An apparatus for providing power to a vehicle's electric power system comprises a converter (602) for converting electric input electricity having an input voltage into output electricity having an output voltage. A sense line (612) is provided for electrically connecting a control unit (611) to the vehicle's electric power system. A power line (613) is for connecting an output of the converter (602) in parallel to the vehicle's electric power system. The control unit (611) is configured to detect a running state of an alternator (201) of the vehicle based on a measurement of a signal on the sense line (612) and control the converter (602) to set the output voltage in dependence on the detected running state.

A storage battery control device for controlling an energy storage system including storage battery rows connected in parallel, each of the storage battery rows having a plurality of storage batteries connected in series and bypass units each of which bypasses corresponding one of the storage batteries, and a switching unit that switches connection and disconnection of the storage battery rows. The storage battery control device executes: charging processing of charging the storage battery rows connected in parallel, first detection processing of detecting a fully charged storage battery during execution of the charging processing, second detection processing of detecting a storage battery having a highest potential among the storage batteries being charged in another storage battery row different from the storage battery row including the fully charged storage battery, and bypass processing of bypassing the storage battery detected in the first detection processing and the second detection processing.

This application provides a charging method and apparatus, a vehicle, and a computer-readable storage medium. The method includes: obtaining a current voltage of a target battery; determining a current power of the target battery based on the current voltage; determining a chargeable power of the target battery based on the current power; and obtaining a real-time voltage of the target battery where the target battery is charged with the chargeable power, where the real-time voltage is used for determining a charge cut-off voltage of the target battery in a next charging.

One embodiment is a system comprising a medium voltage direct current (MVDC) link electrically coupling a first AC-DC converter and a second AC-DC converter. The first AC-DC converter is electrically coupled with a first alternating current (AC) feeder. The second AC-DC converter electrically coupled with a second AC feeder. A battery charger electrically coupled with the MVDC link via a converterless connection. A first electronic controller is operatively coupled with the first AC-DC converter. A second electronic controller is operatively coupled with the second AC-DC converter. During operation of the battery charger to charge a battery the first electronic controller is configured to control power flow between the first AC feeder and the second AC feeder and the second electronic controller is configured to control the voltage of the MVDC link.

A method for charging a battery, includes: detecting current geographic location information and current time information of the terminal; determining a current temperature characteristic of an environment where the terminal is currently located according to the current geographic location information and the current time information; determining a target full charging voltage matching the current temperature characteristic, and charging a battery of the terminal with the target full charging voltage, in which different full charging voltages match with different temperature characteristics.

A charging cabinet system includes a power supply system, a controlling and displaying system, and a plurality of charging compartments. The power supply system is connected with the controlling and displaying system. The charging compartment is connected with both the power supply system and the controlling and displaying system. The charging compartment includes: a charging module for charging a low-power battery; a driving module for moving the battery out of the charging compartment or moving the battery into the charging compartment; a detection module for detecting whether a fully charged battery is picked by a user after being moved out of the charging compartment for a period of time; and a controller connected with the charging module, the driving module and the detection module, and connected with the controlling and displaying system. The technical effect of the disclosure is that it can effectively prevent the battery from being lost.

A multi-spectral flashlight includes a housing, a battery disposed in the housing, a power switch, a LED module including a plurality of LEDs which emit different colors of illumination, a LED driver coupled to the LED module, and an alternate illumination selector switch coupled to the LED driver. The LED driver is configured to drive the LED module in a default illumination mode in response to a first user operation of the power switch and a selected alternate illumination mode in response to a second user operation of the power switch. The LED driver is further configured with a plurality of selectable pre-determined alternate illumination modes which include different colors of illumination. The LED driver advances through the plurality of selectable pre-determined alternate illumination modes in response to operation of the alternate illumination selector switch, allowing selection of one of the plurality of modes as the selected alternate illumination mode.

A method and apparatus for determining safety of a battery are disclosed, where the method includes identifying a charge state or a discharge state of the battery, activating pulse probe currents at different depths of charge or discharge (charge/discharge) of the battery, in response to identifying the charge or discharge state of the battery, and detecting and differentiating between a state of short (SOS) and a state of health (SOH) of the battery based on variations of the pulse probe currents as a function of the depths of charge/discharge.