A wireless power receiving device includes a first housing, a second housing coupled to the first housing to be changed in relative position with respect to the first housing, a first resonance circuit disposed in the first housing, and at least one processor. The at least one processor may be configured to control the wireless power receiving device to wirelessly receive power from a wireless power transmitting device through the first resonance circuit, identify a charging efficiency corresponding to the received wireless power, and in case the identified charging efficiency is less than a threshold, provide content for changing an angle between the first housing and the second housing.

At least some embodiments of the present disclosure are directed to systems and methods for predictive energy management for an electrified powertrain. In some embodiments, the system is configured to: receive a first state-of-charge (SOC) of a high-voltage energy storage system; receive a second SOC of a low-voltage energy storage system; predict an energy recuperation of an electrified powertrain using telematics data; and determine a charging direction of a bidirectional converter based on the predicted energy recuperation, the first SOC, and the second SOC.

A control device includes a communication circuit configured to acquire battery voltage information of a battery of an electronic device, and a control circuit configured to control, based on the battery voltage information, a charging voltage supply circuit that supplies a charging voltage to the electronic device at a contact point such that a voltage difference between the charging voltage and a battery voltage of the battery is a given set voltage.

A method of determining whether a first playback device is to rejoin a group is disclosed. The method comprises playing back, by the first playback device, media content in synchrony with at least a second playback device, wherein the first and second playback devices are playing back the media content as members of a group. While playing back the media content, and after a loss of power at the first playback device, the method comprises stopping, by the first playback device, playback of the media content. After the loss of power, and after a resumption of power to the first playback device the method comprises automatically determining to rejoin the group and joining the first playback device to the group.

The vehicle control device controls a vehicle configured to receive power by non-contact from a power transmission coil when passing over the power transmission coil. The vehicle control device includes a processor configured to prohibit lane changing by the vehicle in a predetermined range up to an end point of a power supply area where the power transmission coil is installed when the vehicle is running in a lane of the power supply area.

An electric power management system is a system that performs an exchange of electric power with an electric power system of an electric power company that is a counterparty of the exchange of the electric power, and includes a plurality of the vehicles, each including a battery, and a server that manages an exchange of the electric power between the battery of each of the vehicles and the electric power system. The server manages the exchange of the electric power for each vehicle group in which the vehicles are bundled, and configures the vehicle group in advance by bundling the vehicles having the same or similar electric power supply and demand characteristics of the battery.

An information processing device includes a control unit configured to perform: acquiring a charging time required for charging a battery with which a predetermined device is operated with a first state of charge for each of a plurality of charging methods; and notifying the predetermined device of the charging times acquired for the plurality of charging methods.

Battery management techniques for a vehicle include a set of sensors configured to measure a set of parameters of a battery of the vehicle and a controller configured to control recharging of the battery to a first target state of charge (SOC) corresponding to optimized battery life when a mileage of the vehicle is less than a threshold mileage corresponding to an expected transport period of the vehicle, wherein controlling the recharging of the battery to the first target SOC prevents battery malfunctions and thereby reduces vehicle warranty costs for an original equipment manufacturer (OEM) of the vehicle, and control recharging of the battery to a second target SOC determined by a cost-based optimization technique when the mileage of the vehicle reaches the threshold mileage.

A battery powered electronic device can include a wireless power system configured to receive power from a wireless power transmitter, a converter coupled to the wireless power system that converts a voltage from the wireless power system to a battery charging voltage, a battery comprising at least two cells, a power management unit that delivers power from one or more of the at least two cells to one or more subsystems of the electronic device, and a plurality of switching devices connecting the at least two cells, the converter, and the power management unit. The plurality of switching devices can be arranged so that a first switching configuration connects the cells in series for charging from the converter and a second switching configuration connects the cells in parallel for delivering power to the power management unit.

Various embodiments of the present technology may comprise methods and apparatus to determine an RSOC value of a battery. The methods and apparatus may comprise utilizing various parameters, such as voltage and/or current, to calculate the RSOC of the battery. In various embodiments, the methods and apparatus may display one of a first RSOC and a second RSOC. In various embodiments, the methods and apparatus may further detect changes in the relevant parameter(s), adjust a previously-reported RSOC of the battery accordingly, and report the adjusted RSOC.