The application provides a battery management method and a power supply system. The battery management method includes: providing the power supply system comprising a power supply device and a plurality of battery systems connected in parallel, the power supply device electrically configured to control the charging or discharging of each of the plurality of battery systems connected to each of the plurality of battery systems; detecting an actual voltage of each battery system; controlling the start of battery systems with a low actual voltage for charging or discharging; and controlling the start of battery systems with a high actual voltage after the actual voltage of each battery system is balanced. The battery systems are directly controlled by the power supply device when connected in parallel to the power supply system, such that unlimited capacity expansion may be realized without redesigning the battery systems or adding a BMS.

A secondary battery protection circuit for protecting a secondary battery, including: a low-voltage detecting circuit configured to detect a voltage across the secondary battery that is lower than a second voltage for low voltage detection, the second voltage being set to be lower than a first voltage for overdischarge detection; and a switching circuit configured to cause a gate of a charge control NMOS transistor to be fixed at a potential at a high side power supply terminal, upon detecting, by the low-voltage detecting circuit, that the voltage across the secondary battery is lower than the second voltage for low voltage detection.

A three-phase synchronous rectifier for charging a battery on board the vehicle, comprising a first and a second input which are independent of each other and each connectable to a respective first and second three-phase output branch of a generator, two independent negative and positive outputs each connectable to the respective poles of the battery, a first group of three rectification units configured to be connected to the first output branch of the generator via said first input, a second group of three rectification units configured to be connected to the second output branch of said generator via the second input. Advantageously, the rectification units are configured to be simultaneously connected to the battery of the vehicle.

A balancing apparatus, a battery management system and a battery pack including the battery management system are described. The balancing apparatus includes a voltage regulator to generate a first high level voltage from a voltage of an auxiliary battery, a power switch electrically connected to a high voltage node of a battery group, a DC-DC converter to generate a second high level voltage from a voltage applied to a voltage input terminal, a balancing unit including a plurality of balancing circuits connected in parallel to a plurality of battery cells of the battery group; and a control unit to hold the first high level voltage applied to the control terminal of the power switch in response to the second high level voltage being applied to the power terminal.

An electric power system includes a relay which is switched between an on state in which charging/discharging of a battery is permitted and an off state in which charging/discharging of the battery is inhibited, and an electronic control unit which controls switching of the relay between an on state and an off state based on a command from an electronic control unit. When a command for switching the relay from the on state to the off state is given from the electronic control unit to the electronic control unit, in a case where an abnormality occurs in the electronic control unit or in a case where an abnormality occurs in communication between the electronic control unit and the electronic control unit, the electronic control unit switches the relay to the off state.

A power supply unit includes: a power supply configured to discharge power to a load for generating an aerosol from an aerosol generation source; a charger configured to convert inputted power into charging power; a temperature measuring unit configured to measure a temperature of the power supply; and a charging controller configured to perform a first control for stopping the charger from supplying the charging power to the power supply and a second control for causing the charger to supply the charging power to the power supply, the charging controller setting a duty ratio to a value greater than 0 and smaller than 100 in a case where the temperature of the power supply is within a predetermined range, and the duty ratio being obtained by dividing a time during which the charging controller performs the first control by a unit time.

A charging controlling system includes an input terminal, an output terminal, a battery terminal, and a switch terminal. The charging controlling system includes a coil connected to the switch terminal at a first end thereof. The charging controlling system includes a resistor connected to a second end of the coil at a first end thereof and to the battery terminal at a second end thereof. The charging controlling system includes a capacitor connected between the second end of the coil and the ground. The charging controlling system includes a diode connected to the switch terminal at a cathode thereof and to the ground at an anode thereof. The charging controlling system includes a charging controlling circuit that controls charging of the battery.

An electronic device selectively coupled to a first charger and/or a second charger includes a power supply interface, a first comparator, a second comparator, a controller, a first switch circuit, and a second switch circuit. The power supply interface receives a first input voltage and a second input voltage. The first comparator compares the first input voltage with a first reference voltage, so as to generate a first comparison voltage. The second comparator compares the second input voltage with a second reference voltage, so as to generate a second comparison voltage. The controller generates a first control voltage and a second control voltage according to the first comparison voltage and the second comparison voltage. The first switch circuit is selectively enabled or disabled according to the first control voltage. The second switch circuit is selectively enabled or disabled according to the second control voltage.

The invention relates to an arrangement (10) for balancing the battery cells (11) of a battery string, in particular the battery cells (11) of a battery module which has a plurality of serially connected battery cells (11). The arrangement (10) has an inductor (9) for storing electric energy and switching devices (17) on the supply side for connecting the poles of a first battery cell (11) to the inductor (9) via a first connection point (13) and a second connection point (14). The arrangement can be actuated by a controller such that electric energy can be transmitted from at least one first battery cell (11) to the inductor (9) and from the inductor (9) to at least one second battery cell (11). According to the invention, the arrangement (10) has a third connection point (15) and a fourth connection point (16) in order to balance the charge and two switching devices (17) on the transfer side, wherein the inductor (9) is connected to the third connection point (15) and the fourth connection point (16) via the two switching devices (17) on the transfer side.

A wirelessly chargeable electronic device according to various embodiments may comprise: a first circuit board; a second circuit board; a battery; a flexible printed circuit board (FPCB) electrically connecting the first circuit board and the second circuit board to each other; and a wireless charging antenna stacked on the FPBC, wherein at least a part of the FPBC is arranged overlap in the width range of a pattern of the wireless charging antenna.