A system and method for variable power transfer in an inductive charging or power system. In accordance with an embodiment the system comprises a pad or similar base unit that contains a primary, which creates an alternating magnetic field. A receiver comprises a means for receiving the energy from the alternating magnetic field from the pad and transferring it to a mobile device, battery, or other device. In accordance with various embodiments, additional features can be incorporated into the system to provide greater power transfer efficiency, and to allow the system to be easily modified for applications that have different power requirements. These include variations in the material used to manufacture the primary and/or the receiver coils; modified circuit designs to be used on the primary and/or receiver side; and additional circuits and components that perform specialized tasks, such as mobile device or battery identification, and automatic voltage or power-setting for different devices or batteries.

A system is provided with a set of removable battery packs and a set of power tools each including a motor, a controller, and a battery receiving portion. For each power tool, the controller is configured to identify a type of battery pack coupled to the battery receiving portion and set a conduction band associated with phases of the motor or an advance angle by which phases of the motor are shifted based on the identified type of the battery pack.

The present disclosure relates to systems, methods, and devices for controlling charging of vehicles, to avoid charging during charge-adverse time periods or during charge restriction events. This can advantageously reduce cost to vehicles owners, and or provide access to reward incentives. Further, power distribution entities (utility providers) advantageously have increased control over power distribution to avoid over-burdening of power distribution infrastructure. Further, systems and methods for determining or inferring whether a vehicle is connected to a charge station are described, which can be used to inform automatic restriction of vehicle charging.

A first battery of a battery system can include a thermoelectric component (TEC) that produces electric energy from thermal energy that the first battery generates. The TEC is used to charge a second battery of the battery system, while maintaining proper thermal conditions for the first battery. The battery system can be used to support information technology (IT) equipment by acting as backup power during a power outage, and/or to provide supplemental power under peak power conditions.

A battery charging method and device thereof, relates to a technical field of battery charging, including steps of activating a battery to-be-charged, charging the battery to-be-charged in a low current short-charging mode having a preset time; after the preset time, detecting and obtaining a floating charge voltage value of the battery to-be-charged; if the floating charge voltage value is less than a first voltage threshold, determining that the battery to-be-charged is a nickel-hydrogen battery; if the floating charge voltage value is greater than the first voltage threshold, charging the battery to-be-charged in a constant current long-charging mode, turning off the constant current after reaching a preset voltage value, performing no-load detection on a real-time voltage of the battery to-be-charged, and obtaining a second voltage value of the battery to-be-charged when the real-time voltage drops to be unchanged.

An electrical device includes a control or regulating circuit and a plurality of electromechanical battery interfaces configured to supply the electrical device with a maximum permissible operating voltage using at least one exchangeable battery pack, which is releasably accommodated by the electromechanical battery interfaces. The electromechanical battery interfaces are configured such that exchangeable battery packs of at least two different voltage classes can be accommodated. The control or regulating circuit electrically connects several exchangeable battery packs of a lower voltage class in series and/or in parallel such that a resulting battery voltage does not exceed the maximum permissible supply voltage.

Provided are a wireless charging system, a wireless charging device and a wireless charging method. The wireless charging device includes a voltage conversion circuit, a wireless transmitter circuit and a communication control circuit. The voltage conversion circuit is configured to receive an input voltage and convert the input voltage to obtain an output voltage and an output current. The wireless transmitter circuit is configured to transmit an electromagnetic signal according to the output voltage and the output current of the voltage conversion circuit to perform wireless charging on a device to be charged. The communication control circuit is configured to perform wireless communication with the device to be charged during the wireless charging, to adjust a transmitting power of the wireless transmitter circuit, such that the transmitting power matches a charging voltage and/or a charging current required by a present charging stage of the battery.

A handheld device includes an electronic instrument and a capacitive power supply for storing and delivering power to the electronic instrument. The capacitive power supply includes at least one capacitor, and an electronic circuit operable to boost a voltage from the capacitor to a higher voltage for use by the electronic instrument. The capacitive power supply can be rapidly recharged. Some configurations include an accelerometer which permits the handheld device to detect movement and perform various operations responsive to detected movement. A dual charging station is also disclosed.

Examples relate to a smart bag for charging a set of electronic devices. An example smart bag may comprise a set of power sources integral to the smart bag, where the set of power sources may comprise multiple power sources. The example smart bag may also comprise a power management engine that manages provision of power from each of the set of power sources to a first electronic device.

A charging apparatus and charging method. The apparatus includes a step-current adjustment circuit and an inertial link circuit. The step-current adjustment circuit is configured to determine a first current value based on a charging current condition, and provide a current of the first current value to the inertial link circuit, where the charging current condition includes a temperature and a charge state of the battery, and determine a second current value based on a present charging current condition and in response to the charging current condition changing, and provide a current of the second current value to a current smoothing module. The inertial link circuit adjusts the charging current from the first current value to the second current value in response to the received charging current being converted from the first current value to the second current value, and continuously outputs the adjusted current to the battery.