Abstract: Methods, systems, and devices for wireless charger are described. A charging device may include a base configured to receive a ring-shaped wearable device in multiple radial orientations relative to the base. The charging device may also include a magnetic component configured to magnetically attract a magnetic component of the ring-shaped wearable device to orient the wearable device in a single radial orientation relative to the base. The charging device may include an inductive charging component that may wireless charge the wearable device via an inductive charging component of the wearable device based on the inductive charging components being within a threshold distance.

Abstract: An electronic device included a first energy storage device coupled to a second energy storage device by a conductor. A charging node is coupled to the first energy storage device. Another conductor couples the charging node to the second energy storage device. A switch is electrically coupled between the conductor and the second energy storage device. A control circuit opens the switch, thereby allowing a first charging current to flow from the charging node to the first energy storage device through the conductor and a second charging current to flow from the charging node to the second energy storage device through the other conductor and closes the switch when a difference between a voltage of the first energy storage device and a voltage of the second energy storage device is within a predefined voltage difference threshold.

Abstract: Techniques for converting power received from a power grid at a first voltage and outputting a signal at a second voltage are discussed herein. A power converter with a transformer that has a 22.5 degrees phase shift between current output by corresponding pairs of secondary windings can be utilized to convert power of a first level to power of a second level. The transformer can output power from 30 secondary windings. The power converter can output power with a total harmonic distortion of 5% and an efficiency of 96% or higher. Further, power can be output by a transmission coil and received by a receive coil in a device, such as a vehicle, to wirelessly charge the vehicle.

Abstract: A management system for a multi-cell rechargeable energy storage system (RESS) is capable of wirelessly communicating with an unsecured third-party device. The management system includes a system controller that is in communication with cell monitoring units that are arranged to individually monitor the battery cells. Each cell monitoring unit includes a cell controller that is in communication with a sensor that is arranged to determine a parameter of a respective one of the battery cells of the RESS. Each of the cell controllers is configured to execute a secure wireless communication protocol, and is also configured to execute an open wireless communication protocol. The open wireless communication protocol is activated to enable non-proprietary wireless communication to a proximal third-party device in response to a trigger event.

Abstract: A system includes a power optimized energy source, an energy storage optimized source, and a network that combines a first current from the power optimized energy source and a second current from the energy storage optimized source in order to power a load at least during a high power demand event, including by connecting the power optimized energy source and the energy storage optimized source using a parallel connection.

Abstract: An ASIC chip for performing active battery equalization is provided. The ASIC chip for performing active battery equalization includes: a power conversion module, an equalization switch matrix circuit module comprising a power MOS transistor, a switch control module, a temperature protection module, and a communication interface module. By connecting and controlling the above modules, the equalization switch matrix circuit module performs equalization on a battery in the battery pack. That is, the use of the integrated ASIC chip accelerates and facilitates the BMS solution manufacturers adding the active equalization function, and facilitates the BMS Battery management system effectively improving the service performance and life of lithium batteries.

Abstract: There is disclosed herein examples of system and procedure for assigning state-of-charge profiles to vehicles to extend battery lives of batteries of the vehicles. Determining an optimal state-of-charge profile for the vehicle may take into account battery degradation of the battery of the vehicle and/or characteristics of an operational assignment to which the vehicle is being assigned. The state-of-charge profiles assigned to the vehicles may extend the battery life of the battery of the vehicle and reduce battery replacements of the battery.

Abstract: A power tool system includes a power tool having a tool housing and a load disposed in the tool housing. The tool housing includes a battery pack receptacle having a set of tool terminals. The power tool system includes a set of battery packs. Each battery pack includes a battery pack housing operably connectable to the battery pack receptacle through a battery pack interface disposed on the battery pack housing, a set of battery cells disposed in the battery pack housing, and a set of battery pack terminals electrically connectable to the set of tool terminals and electrically connected to the set of battery cells. Each battery pack in the set of battery packs has a same nominal voltage and defines a common interface and at least a portion of the set of battery packs defines a total volume in a range of approximately 150 cm3 to 1300 cm3.

Abstract: Systems, methods, and apparatus for providing a homopolar generator charger with an integral rechargeable battery. A method is provided for converting rotational kinetic energy to electrical energy for charging one or more battery cells. The method can include rotating, by a shaft, a rotor in a magnetic flux field to generate current, wherein the rotor comprises an electrically conductive portion having an inner diameter conductive connection surface and an outer diameter conductive connection surface, and wherein a voltage potential is induced between the inner and outer diameter connection surfaces upon rotation in the magnetic flux field. The method can also include selectively coupling the generated current from the rotating rotor to terminals of the one or more battery cells.

Abstract: A charging system is provided herein. The charging system includes an alternating current (AC) power source, opening/closing rectifying units composed of rectifying circuits and opening/closing circuits, and a control device. The rectifying circuits are connected to modules formed by dividing a battery into the modules. The rectifying circuits supply direct current (DC) electric power obtained by rectifying AC electric power supplied from the AC power source to the modules. The opening/closing circuits switch between connection and disconnection between the AC power source and each of the modules. The control device controls connection and disconnection of the opening/closing circuits in accordance with a state quantity of at least one of an output voltage of the AC power source and an input voltage of the rectifying circuits or a state quantity associated with at least one of the output voltage and the input voltage.

Abstract: A battery management system for dynamically balancing power in a battery module is provided. The battery management system comprises a plurality of modules, and each of the plurality of modules comprises a plurality of bricks. Each of the plurality of bricks comprises a plurality of blocks, electrically connected in one of a series configuration or a parallel configuration and a controller assembly provided in each of the plurality of the modules. The controller assembly comprises a first converter adapted to be connected to the plurality of bricks and a second converter adapted to be connected to an external system. The controller assembly is configured to obtain a plurality of battery pack parameters from the plurality of bricks using the first converter, process the obtained plurality of battery pack parameters and determine a current level to regulate a charging or discharging of the battery pack using the second converter.

Abstract: An electronic device for inductive power transfer with a second electronic device is disclosed. The electronic device includes a first inductive coil and a permanent magnet strucrure for creating a magnetic attachment between the electronic device and the second electronic device. The permanent magnet structure is positioned around an outer perimeter of the inductive coil to align the inductive coil with a second inductive coil in the second electronic device for inductive power transfer. The permanent magnet structure forms a ring that includes a gap and includes one or more arc-shaped magnets. The permanent magnet structure is configured such that the electronic device can be rotated across a continuous range of angles with respect to the second electronic device while keeping alignment between the coils during inductive power transfer. The electronic device is configured to communicate with the second electronic device through a modulated current in the inductive coil.

Abstract: An electronic device for inductive power transfer with a second electronic device is disclosed. The electronic device includes an inductive coil and a permanent magnet structure for creating a magnetic attachment between the electronic device and the second electronic device. The permanent magnet structure is positioned around an outer perimeter of the inductive coil to align the inductive coil with a second inductive coil in the second electronic device for inductive power transfer. The permanent magnet structure forms a ring that includes a gap and includes one or more arc-shaped permanent magnets. The permanent magnet structure is configured such that the electronic device can be rotated across a continuous range of rotational angles with respect to the second electronic device while keeping the alignment between the inductive coil and the second inductive coil during inductive power transfer.

Abstract: A method for measuring a position, is performed by a vehicle assembly (VA) for alignment between a ground assembly (GA) and the VA. The method includes transmitting low frequency (LF) signals to initiate alignment with the GA and estimating a position of a vehicle using at least one sensor mounted on the vehicle. Information regarding the estimated position of the vehicle is provided to the GA and information regarding a position of the vehicle measured by LF receive antennas of the GA and an acceleration flag calculated by the GA is received. Accordingly, a transmission strength of the LF signals transmitted by the VA is adjusted based on the information regarding the position of the vehicle measured by the LF receive antennas and the acceleration flag.

Abstract: A battery management apparatus, battery management method and battery pack that detects feature points of each of a first differential capacity curve acquired by charging the battery with a first constant current, a second differential capacity curve acquired by discharging the battery with the first constant current, a third differential capacity curve acquired by charging the battery with a second constant current and a fourth differential capacity curve acquired by discharging the battery with the second constant current, and determines degradation information of the battery based on voltage values of the feature points detected from each differential capacity curve.

Abstract: A power storage device management system includes a storage device configured to store power storage devices that are removably mounted on an electric power device using electric power and a server device communicatively connected to the storage device. The server device includes a first storage unit storing identification information of a power storage device shared by a plurality of users among the power storage devices as storage identification information. The storage device includes a second storage unit storing the storage identification information received from the server device and a determiner configured to determine whether or not reception of the power storage device is possible on the basis of the storage identification information stored in the second storage unit when the power storage device has been received from a user.

Abstract: Embodiments described herein provide a modular storage for power tool devices including a charging compartment for power tool battery packs. The modular storage includes a housing, a storage compartment in the housing, and a charger compartment in the housing including a battery pack interface configured to receive a power tool battery pack. The modular storage also includes an AC input receiving universal AC power and an active power factor correction (PFC) converter receiving AC power from the AC input and configured to convert the AC power to a high-voltage DC output. The modular storage further includes a DC-DC converter electrically connected between the active PFC converter and the battery pack interface, the DC-DC converter including an active clamp flyback converter.

Abstract: The present application provides a timing apparatus mounted in an unmanned aerial vehicle (UAV). The timing apparatus includes: a timing unit configured to generate a current reference time and to send the current reference time to at least one system in the UAV; and a power supply unit connected to the timing unit and configured to supply power to the timing unit. According to the timing apparatus provided in the present application, the current reference time is generated through the timing unit in the technical apparatus, and is provided to the system in the UAV, thereby synchronizing a system time of the UAV with the current reference time.

Abstract: A battery pack connection system includes a first battery pack, a second battery pack, and a battery receptacle. Each of the first and second battery packs includes a first guide slot, a second guide slot, and an electrical connector slot. The second battery pack has a power capacity and a width greater than the first battery pack. The battery receptacle defines an elongate passage sized and shaped to separately receive each of the first and second battery packs therein. The battery receptacle includes an electrical connector rail, a first guide rail sized and shaped to cooperatively engage the first guide slot of each of the first and second battery packs, and a second guide rail sized and shaped to cooperatively engage the second guide slot of each of the first and second battery packs.

Abstract: A method, device, and computer-readable medium for operating an electrical energy store is provided. The electrical energy store includes a storage cell for storing electrical energy and a control unit. State variables of the electrical energy store are detected. The state variables are transmitted to a computation unit outside of the electrical energy store. The electrical energy store is operated based on operating parameters provided by the computation unit.