Provided is a charging/discharging control device (100) which, for an assembled battery (10) including a plurality of storage batteries (1) connected in series, detects capacity variation among the storage batteries (1) and controls charging/discharging of the assembled battery (10). The charging/discharging control device (100) of the present invention includes a charging/discharging control unit (2) which calculates an electric-charge-quantity corresponding value which is a value corresponding to an electric charge quantity of the assembled battery (10), on the basis of a current value of the assembled battery (10), and calculates, as a voltage second-order derivative value, a value obtained through second-order differentiation of open-circuit voltage of the assembled battery (10) with respect to the electric-charge-quantity corresponding value. When a predetermined charging-stop condition is satisfied, the charging/discharging control unit (2) performs control to stop charging, and determines whether or not there is capacity variation among the plurality of storage batteries (1) in the assembled battery (10), on the basis of the voltage second-order derivative value when the charging-stop condition is satisfied.

A battery charging apparatus includes a first switch, a second switch, a third switch and a fourth switch connected in series between an input voltage bus and ground, wherein a common node of the second switch and the third switch is configured to be coupled to a battery, a flying capacitor connected between a common node of the first switch and the second switch, and a common node of the third switch and the fourth switch, and a controller configured to generate gate drive signals for configuring at least one switch of the first switch and the second switch as a linear regulator during a charging process of the battery.

A battery charging method includes acquiring a functional relationship of a differential value of an amount of charge or a state of charge (SOC) with respect to a voltage of a battery based on the voltage or the SOC, determining charging steps for charging of the battery by analyzing the functional relationship, and generating a charging profile comprising charging currents for each of the charging steps to charge the battery.

A charging cable has a current sensor, a charging state indicator and logic circuitry to operate the indicator based on detected levels of current flow to a chargeable device. If the sensor detects current below a low threshold, the logic circuitry operates the indicator to indicate that the cable is not connected to any chargeable device. If the sensor detects current above a higher threshold, the logic circuitry operates the indicator to provide a perceptible output indicating that the cable is connected to the chargeable device and the current is charging the battery. If the sensor detects current at or above the low threshold but below the high threshold, the logic circuitry operates the indicator to provide a perceptible output indicating that the cable is connected to a chargeable device but is not charging the battery of the device, e.g., when the battery is, or is nearly, fully charged.

A server for a deterioration degree determination system for a secondary battery includes an estimation formula memory unit and an update unit. The estimation formula memory unit stores an estimation formula for determining a deterioration degree based on a battery characteristic related to transition of a battery state over a predetermined voltage section in the secondary battery or a battery characteristic relationship value related to the battery characteristic. The update unit that updates the estimation formula stored in the estimation formula memory unit based on the battery characteristic related to the transition of the battery state of the secondary battery acquired by charging and discharging the secondary battery in an external terminal.

Disclosed are methods, systems, and devices to adaptively charge a battery. Charging current is applied to charge the battery. After application of the charging current, at least one discharging pulse is applied to the battery. During an ON period of the discharging pulse, at least one battery parameter is measured. One or more charging parameters are adapted based on the at least one battery parameter as measured during the ON period of the discharging pulse. The battery is charged based on the adapted one or more charging parameters.

An electrical combination. The electrical combination comprises a battery pack configured to be interfaced with a hand held power tool, a control component, and a semiconducting switch. The transfer of power from the battery pack to the hand held power tool is controlled by the control component and the switch based on one of a battery pack state of charge and a respective state of charge of one of a plurality of battery cells. A discharge current of the battery pack is regulated based on the switch being controlled into one of a first state and a second state by the control component to selectively enable the transfer power from the plurality of battery cells to the hand held power tool.

Provided is a control circuit which can discharge a charge stored in an X capacitor with certainty even when an alternating current input voltage largely fluctuates. The control circuit for controlling a discharge of an X capacitor C100 connected between power source lines AC1 and AC2 having different polarities of an alternating current of an AC-DC convertor which receives inputting of the alternating current, converts the alternating current into a direct current, and outputs the direct current wherein the control circuit detects a change state of a voltage of the X capacitor C100, and controls the discharge such that a charge stored in the X capacitor C100 is discharged based on the change state.

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.

A power supply apparatus and method for providing electric energy to a target system are provided. The power supply apparatus includes: a capacitor module configured to store electric charge and provide electric energy to a target system based on the stored electric charge; an internal battery module configured to be operably connected with the capacitor module in series; and an output interface configured to couple the internal battery module with the capacitor module. The internal battery module and the capacitor module provide electric energy to the target system in controllable series connection through the output interface.