A charge/discharge control circuit includes: an output terminal from which a cell-balance control signal is sent to each of the first and the second cell balance circuits; the first and the second voltage detection circuits; a control circuit configured to send the first and the second control signals in accordance with a detection signal received from at least one of the first and the second voltage detection circuits; and an output circuit configured to select one of a voltage of a power supply terminal, a voltage of an input terminal connected to each of a negative electrode of a first battery and a positive electrode of a second battery, and a voltage of a ground terminal in accordance with the first and second control signals, and send the selected voltage to the output terminal.

An embodiment of the disclosure provides a first power receiving device including a battery, a power management integrated circuit, an interface for receiving power from a power supply device, and a processor configured to control a charging current using the power management integrated circuit. The processor may be configured to: if charging from the power supply device through the interface is detected, set the charging current, transmit first charging information associated with the first power receiving device to the power supply device, through the interface, receive second charging information associated with a second power receiving device which is paired with the first power receiving device or associated with the power supply device from the power supply device, through the interface, and control the charging current by comparing the first charging information and the second charging information.

A system and a method of controlling a solar roof of a vehicle are provided. The system includes a solar cell panel and a controller that controls charging of a main battery and an auxiliary battery using power generated from the solar cell panel. A light amount sensor senses the amount of light collected in the solar cell panel and a temperature sensor measures a surface temperature of the solar cell panel.

System and method of dynamically balancing a rechargeable energy storage assembly having two or more respective units, a respective switch for each of the respective units and at least one sensor. The system includes a controller configured to control operation of the respective switch. The respective switch is configured to enable a respective circuit connection to the respective units when in an ON state and disable the respective circuit connection when in an OFF state. The respective units are characterized by a respective state of charge obtained based in part on the at least one sensor. A controller is configured to selectively employ at least one of a plurality of charging modes to charge one or more of the respective units, through operation of the respective switch. The plurality of charging modes includes a rest charging mode, a rapid initial charging mode and a rapid final charging mode.

A battery pack may include a battery (60), a board (10), a first connection terminal (12), a second connection terminal (11), a control circuit (620), and a busbar (18). The first connection terminal is provided on the board and is configured to be connected to an electric work machine (500). The second connection terminal is provided on the board and is connected to the battery. The control circuit is provided on the board and is configured to control discharging of the battery. The busbar is provided on the board in a current discharge path between the first connection terminal and the second connection terminal.

A charging device that charges a battery having cells connected in series and configured as cell units, the charging device includes a solar battery, and a charging circuit configured to selectively supply electric power generated by the solar battery to each of the cell units. The charging circuit includes a first electric power adjustment unit configured to adjust electric power generated by the solar battery into first electric power, and output the first electric power, a second electric power adjustment unit configured to adjust the first electric power into second electric power, and supply the second electric power to each of the cell units, and a power storage unit provided between the first electric power adjustment unit and the second electric power adjustment unit and configured to store the first electric power output by the first electric power adjustment unit.

A multiple-battery charger includes a switching subsystem and a control element. The switching subsystem is configured to selectively electrically connect each of a plurality of individual batteries one at a time to a constrained energy source having electrical power production that varies over time. The control element is operatively connected to the switching subsystem. The control element is configured to deliver one or more pulse width modulated signals to the switching subsystem. The one or more pulse width modulated signals establish a duty cycle with which each of the plurality of batteries is electrically connected to the constrained energy source to receive electrical power from the constrained energy source.

An electric-vehicle battery system includes a high voltage system with a plurality of connected rechargeable battery cells; a low voltage system with an operating voltage lower than an operating voltage of the high voltage system, the low voltage system supplying a battery system manager; and a real time clock configured to provide a system time to the battery system manager. The real time clock may be at least temporarily powered by the high voltage system.

Space-saving in an automobile or the like provided with a battery is achieved. Design flexibility of an automobile or the like can be improved. An electric power control method or an electric power control system capable of utilizing electric power efficiently is provided. It is an electric power control system of an automobile including a car body, a first battery, a second battery, and a control unit. The control unit obtains states of charge of the first battery and the second battery, determines whether or not a difference between remaining capacities of the first battery and the second battery exceeds a predetermined value, and controls transmission of electric power between the first battery and the second battery, in the case where the difference in the remaining capacities exceeds the predetermined value, to be made such that the remaining capacities are close to each other.

In a storage-battery control system, an insulating communication unit couples a controller to a battery module constituting a storage battery unit that outputs a predetermined high voltage value. A power supply line is further provided for supplying electric power output from a controller DC/DC, i.e., a controller-side voltage converter for the controller, to the battery module, so that electric power is collectively supplied via the power supply line to a module CPU and a module-side insulating circuit both consuming electric power in the battery module. A secondary battery in the battery module supplies electric power to only a cell-voltage detector.