An apparatus and method of balancing cells in a battery using an isolated power supply and pairs of switches to direct power to cells at a lower state of charge to bring them into balance with cells at a higher state of charge.

An energy storage device mounted in a moving body, the energy storage device including a plurality of thin-coated cells to which first active materials having thicknesses within a first range are applied between a current collector and a separator, and a plurality of thick-coated cells to which second active materials having thicknesses within a second range whose lower limit value is greater than an upper limit value of the first range, are applied between the current collector and the separator. The thin-coated cells and the thick-coated cells are alternately arranged at predetermined intervals.

Systems, methods, and computer program products are provided for monitoring and passive balancing in battery pack charging. An example system includes a plurality of voltage detectors, a plurality of passive balancing circuits, a charging current detector, and a control circuit. The control circuit may be configured to receive a plurality of voltage measurements and a charging current measurement; determine based on a voltage measurement of the plurality of voltage measurements and/or the charging current measurement, whether to activate a passive balancing circuit of the plurality of passive balancing circuits to adjust the adjustable resistance of the passive balancing circuit; and adjust, based on a passive balance current measurement through the passive balancing circuit and the voltage measurement, the adjustable resistance of the passive balancing circuit.

Systems and apparatus may carry out analysis of battery physical phenomena, and characterize batteries based on phenomena occurring in particular time and/or frequency domains. These systems may be additionally responsible for charging and/or monitoring a rechargeable battery. Examples of battery physical phenomena include mass transport (e.g., diffusion and/or migration) in battery electrolytes, mass transport in battery electrodes, and reactions on battery electrodes.

An electronic device may include a battery, a charging circuit, at least one sensor, a plurality of temperature sensors disposed respectively at different positions, at least one processor operatively coupled to the battery, the charging circuit, the at least one sensor, or the plurality of temperature sensors, and memory. The memory storing instructions which are configured to, when executed, cause the electronic device to, measure temperature values at intervals of a predefined period using the plurality of temperature sensors during charging, identify a heat state based on at least in part of the measured temperature values, identify a user contact state using the at least one sensor, and control charging power for the battery through the charging circuit based on the heat state and the user contact state. Various other embodiments are also available.

A system is disclosed for determining complex impedance characteristics of one or more battery cells based on the charge signal applied, or to be applied, to the battery cell. Implementations may include measuring the impedance of a battery cell to, in some instances, determine a frequency component or harmonic that defines, at least a portion, of a waveform shape for charging the battery cell. In one implementation, the impedance at the battery cell may be measured or estimated from a discrete charge period being applied to the battery cell or from multiple discrete charge periods applied to the battery cell. The measured differences between the amplitude and time components of the voltage and current waveforms may be used to determine or estimate the magnitude, phase shift, real, and/or imaginary values of the impedance at the battery cell.

A device includes a battery module, and an inverter configured to convert a DC voltage output from the battery module into an AC voltage. The battery module includes battery cells connected in series, and a state detection unit configured to detect a state of each battery cell of the battery cells. An output voltage of the battery cells is input to the inverter without being stepped up. At least some battery cells of the battery cells are reused battery cells. The electrical storage device includes a switching unit configured to connect/disconnect an electrical connection between the battery cells and the inverter. The switching unit is controlled into a disconnected state when a voltage of the battery cells or the DC voltage on an input side of the inverter exceeds a threshold.

A vehicle is configured to perform charging/discharging between an EVPS and the vehicle via a vehicle inlet. The vehicle includes an ECU that controls charging/discharging of the vehicle, and a control signal circuit including at least one control signal line connected between the vehicle inlet and the ECU. The control signal circuit includes a compatible circuit for ensuring compatibility of a control signal transmitted through the at least one control signal line between the EVPS and the ECU, and an isolating element of capacitive coupling type or magnetic coupling type electrically isolating the compatible circuit from the ECU.

A power supply unit for an aerosol generation device includes: a power supply configured to supply power to a heater configured to heat an aerosol source; a receptacle configured to receive power for charging the power supply from a plug connected to an external power supply; a charger configured to control charging of the power supply by power received by the receptacle; and a controller. The receptacle and the power supply are connected in parallel with the charger, and the charger is configured to supply power from the receptacle and the power supply to the controller via the charger.

An aspect of the current disclosure includes a battery management apparatus including a plurality of resistors respectively connected to a plurality of batteries, respectively, a plurality of first switches configured to respectively connect the plurality of resistors to output terminals of the plurality of batteries, respectively, a plurality of second switches configured to connect the plurality of resistors to each other in parallel, and a controller configured to determine whether each of the plurality of batteries is abnormal, and control operations of the plurality of first switches and the plurality of second switches based on whether each battery of the plurality of batteries is abnormal.