Abstract: A handheld device for jump starting a vehicle engine includes a rechargeable lithium ion battery pack and a microcontroller. The lithium ion battery is coupled to a power output port of the device through a FET smart switch actuated by the microcontroller. A vehicle battery isolation sensor connected in circuit with positive and negative polarity outputs detects the presence of a vehicle battery connected between the positive and negative polarity outputs. A reverse polarity sensor connected in circuit with the positive and negative polarity outputs detects the polarity of a vehicle battery connected between the positive and negative polarity outputs, such that the microcontroller will enable power to be delivered from the lithium ion power pack to the output port only when a good battery is connected to the output port and only when the battery is connected with proper polarity of positive and negative terminals.

Abstract: A charger case for storing and charging two electronic devices includes a docking tray having two storage compartments to hold the two electronic devices. The charger case includes two device connectors, with each device connector exposed to a respective one of the two storage compartments to establish electrical communication with a respective one of the two electronic devices. A portable charger is included in the case and electrically coupled to the two device connectors.

Abstract: An embodiment of this application provides a charging control method and device and a power management controller. The charging control method includes: determining whether battery status of a battery pack meets preset conditions, where the battery pack includes a plurality of battery cells, and the preset conditions are: the battery pack has been left standing for a preset duration, and an open-circuit voltage of each battery cell in the battery pack falls within a preset range; and charging the battery pack based on a charging policy corresponding to a determining result, so that a capacity of a battery cell with a highest remaining capacity in the battery pack reaches a nominal capacity of the battery cell with the highest remaining capacity.

Abstract: An electronic device, which can charge a battery selected from a plurality of batteries and can drive the battery as a power feeding source, includes a control unit and a display unit. When a remaining power of a second battery that does not correspond to a first battery selected as a battery to be charged or the power feeding source among the plurality of batteries is higher than or equal to a predetermined threshold value, the control unit causes the display unit to display a remaining power of the first battery from among the remaining power of the first battery and the remaining power of the second battery, and when the remaining power of the second battery is lower than the threshold value, the control unit causes the display unit to display the remaining power of the first battery and the remaining power of the second battery.

Abstract: According to an aspect of the invention, a motor drive circuit includes a first energy storage device configured to supply electrical energy, a bi-directional DC-to-DC voltage converter coupled to the first energy storage device, a voltage inverter coupled to the bi-directional DC-to-DC voltage converter, and an input device configured to receive electrical energy from an external energy source. The motor drive circuit further includes a coupling system coupled to the input device, to the first energy storage device, and to the bi-directional DC-to-DC voltage converter. The coupling system has a first configuration configured to transfer electrical energy to the first energy storage device via the bi-directional DC-to-DC voltage converter, and has a second configuration configured to transfer electrical energy from the first energy storage device to the voltage inverter via the bi-directional DC-to-DC voltage converter.

Abstract: A method for equalizing SOCs of battery packs in an electric vehicle, may include acquiring, by a controller, SOC information of the battery packs from battery pack state information acquired by state detectors under predetermined conditions of the electric vehicle, determining, by the controller, an average SOC value of the battery packs based on acquired SOC values of the respective battery packs, determining, by the controller, at least one battery pack required to be discharged for equalization of the SOCs of the battery packs among all the battery packs based on the SOC values of the respective battery packs and the determined average SOC value of the battery packs, and operating, by the controller, an electric load connected to the at least one determined battery pack required to be discharged to discharge the at least one determined battery pack required to be discharged.

Abstract: A power management system for an air mobility vehicle includes a plurality of batteries configured to provide power to a propulsion unit of the air mobility vehicle to propel the air mobility vehicle, and a discharge control unit configured to monitor an operation state and a charge state of each battery, determine a discharge mode of each of the plurality of batteries according to the monitored operation state and the monitored charge state, and control whether each of the plurality of batteries is discharged or a discharge rate thereof according to the determined discharge mode.

Abstract: A system and method for hierarchical arc fault monitoring in an energy storage system, where the energy storage system includes a plurality of stacks that are electrically coupled together. Each stack includes a plurality of battery management system nodes that are electrically coupled together. The method includes (1) obtaining respective electrical measurement values for each stack; (2) determining, for each stack, that the stack is free of arc faults, using the respective electrical measurement values for the stack; (3) obtaining electrical measurement values for the energy storage system; and (4) determining that the energy storage system is free of arc faults outside of the plurality of stacks, using (a) the electrical measurement values for the energy storage system and (b) a subset of the respective electrical measurement values for each stack.

Abstract: An apparatus for voltage sharing of series connected battery modules in a DC microgrid includes a battery management system and a battery module controller that generates, for an mth of N converters connected together to a DC microbus, a droop current ?d,m that includes a converter voltage error signal {tilde over (v)}err,m multiplied by a droop multiplier gd(i). Each converter is a DC/DC converter connected between a battery module, with one or more battery cells, and the DC microbus. The mth converter uses the droop current ?d,m, a common current reference ?all of a battery pack that includes the battery modules and an input current ?m to the mth converter to control switching of the mth converter. The common current reference ?all is from the battery management system. The voltage error signal {tilde over (v)}err,m is based on an output voltage {tilde over (v)}o,m of the mth converter and an average converter output voltage {tilde over (v)}avgeodcmastereodcmastereodcmaster.

Abstract: This application provides a battery charging control method and device. Voltages of N cell units in an Mth sampling period are obtained, and a voltage of the battery at each sampling moment among K sampling moments in said sampling period is calculated. Charging of the battery is stopped when the voltage of the battery increases monotonically in the Mth sampling period and a trend of a fitting curve of the voltage of at least one cell unit among the N cell units in said sampling period is not rising.

Abstract: A method of controlling a battery system in a vehicle during discharging or charging includes temporarily interrupting discharging or charging of the identified battery cell with the lowest or highest state charge level; continuing discharging or charging the remaining battery cells; sequentially temporarily interrupting discharging or charging a battery cell in each one of the other battery stacks; controlling a duration of the sequentially temporarily interrupting discharging or charging a battery cell in each one of the other battery stacks based on a battery system characteristic; comparing a monitored state charge levels of the remaining battery cells with the state charge level of the lowest or highest battery cell of the corresponding battery stack; and resuming discharging or charging of the identified battery cell when state charge levels of the remaining battery cells of the set of battery cells corresponds to the state charge level of the identified battery cell.

Abstract: A battery pack charging and discharging protection system comprises a battery pack and a power input controlling circuit connected with the battery pack. The system has a voltage regulator unit and a charging and discharging protection unit. The protection unit includes a coupling wake-up circuit, a power-off acceleration circuit, an MCU self-locking circuit and a button detection circuit. The coupling wake-up circuit is connected with the power input controlling circuit. The power-off acceleration circuit is connected with the coupling wake-up circuit. Compared to the conventional technology, the present invention adopts single-wire compatible communication and coupled wake-up mode to achieve the autonomous power-off of the battery pack in time, avoiding over-discharge of the battery caused by the long-term self-consumption of the battery pack.

Abstract: A battery holding and dispensing device can hold a plurality of batteries, in a single battery size or an assortment of battery sizes. The battery holding and dispensing device includes a frame having a plurality of compartments sized and shaped to each receive a battery of a particular battery size and each having a magnetic insert for releasably retaining the battery in the compartment. A system is disclosed for inductive charging of batteries held in a caddy.

Abstract: A battery monitoring system includes a plurality of battery cells connected in series; a cell voltage measurement circuit for measuring a voltage of the battery cells; a first terminal connected to the cell voltage measurement circuit; a second terminal isolated from the cell voltage measurement circuit; a plurality of protection elements each corresponding to each of the battery cells; and a protection circuit connected to the second terminal for discharging an electric current from the protection elements through the second terminal.

Abstract: Example implementations include a charging device with a capacitor divider circuit including a plurality of battery state inputs operably coupleable to a plurality of battery devices, and a pulse width modulation (PWM) generator operable to selectively charge the battery devices, a plurality of switching transistors each operatively coupled at a gate terminal thereof to a respective PWM control output of a plurality of PWM control outputs, and a flying capacitor operatively coupled at a first terminal thereof to a first plurality of the switching transistors, operatively coupled at a second terminal thereof to a second plurality of the switching transistors.

Abstract: A device capable of being used for a long time is achieved. A power supply, a connection method of a power supply, or a connecting member, for easy attachment and detachment and non-detachment when in use, is provided. A power supply, a connection method of a power supply, or a connecting member for easy replacement is provided. A highly designed power supply is provided. Power from a battery is supplied to an electronic device through a connecting member including a pipe, a spring, and a pair of pivots. The pair of pivots are electrically insulated from each other, and electrically connected to any one of a pair of electrodes of the battery. The electronic device into which the pair of pivots are inserted includes a pair of bearings capable of receiving power.

Abstract: Systems and methods for wireless power transmission based on object identification are provided. A radio frequency wireless power transmitter is in communication with a video camera for capturing image data (e.g., a visual pattern) of at least a portion of a transmission field of the radio frequency wireless power transmitter. A processor of the radio frequency wireless power transmitter is configured to identify an object when the visual pattern matches a pre-stored visual pattern representing the object, and control transmission of one or more radio frequency power transmission waves to a receiving electronic device based on a location of the identified object, wherein the receiving electronic device uses the one or more radio frequency power transmission waves to power or to charge the receiving electronic device.

Abstract: A battery pack includes a plurality of cells and a control module. The control module is configured to acquire internal resistance of each of the plurality of cells, acquire a terminal voltage of each of the plurality of cells in real time in a case where the plurality of cells are charged with a constant current, determine an electromotive force of each of the plurality of cells based on the internal resistance of each of the plurality of cells and a charging current and the terminal voltage, determine a target cell from the plurality of cells based on the electromotive force of each of the plurality of cells, and perform charging balancing management on the target cell.

Abstract: This document describes techniques and systems that enable battery state estimation. The techniques and systems may be used to determine a shut-down voltage for a battery of an electronic device. Additionally or alternatively, the techniques and systems may be used to determine a state-of-charge of the battery, which may be determined relative to the shut-down voltage. The techniques and systems use current or expected conditions at the battery to estimate the battery state. These techniques can allow the electronic device to dynamically set a shut-down voltage, rather than using a fixed shut-down voltage over the life of the electronic device. The dynamically set shut-down voltage can provide a low margin, and therefore a greater portion of battery capacity, when operating in good conditions and provide a relatively large margin that is sufficient for poor conditions.

Abstract: A power regulation apparatus includes a first switch and a switch control signal generation unit including a first transconductance unit including a first input terminal for receiving a first voltage from a first terminal of the first switch, a second input terminal for receiving a second voltage from a second terminal of the first switch, and an output terminal for being connected to a first node, a node voltage generation unit connected to the first node and configured to generate a node voltage signal at the first node, and a second transconductance unit including a first input terminal for receiving a current characterization signal characterizing a current flowing through the first switch, a second input terminal for being connected to the first node so as to receive the node voltage signal, and an output terminal for being connected to a control terminal of the first switch.