An electrical energy storage device includes a plurality of energy cell slots for receiving energy cells; and a controller; wherein the controller is arranged to estimate a characteristic of a cell in each slot; and wherein the controller is arranged to apply charge and discharge currents to each cell slot dependent upon at least one estimated characteristic currently associated with that slot. The controller may be a single controller that controls all slots or it may be implemented as multiple controllers each controlling more than one cell slot or a controller for each slot. The characteristic may be one or more of: a power capability, a storage capacity, a cell impedance, an energy cell type and an energy cell chemistry.

Provided are a charging method and device, capable of meeting battery requirements for usage life and charging speed in different charging processes. The method includes determining an actual capacity of a battery; according to the actual capacity of the battery, updating a charging parameter of the battery. The charging parameter of the battery includes at least one of the following: a charging current of the battery in a constant current stage, a charging cutoff voltage of the battery in a constant current stage, and a charging cutoff current of the battery in a constant voltage stage. The method further includes charging the battery according to the charging parameter of the battery.

The present application provides a charging current control method, an electronic device, and a power supply device. The method comprises: in the process of charging a battery, the electronic device determines a target impedance, wherein the target impedance comprises a first impedance and a second impedance, the first impedance is an impedance between an output of the power supply device and an input of a mainboard, the second impedance is an impedance between an output of the mainboard and an input of the battery, and the target impedance is less than a total impedance between the output of the power supply device and the input of the battery; and the electronic device sends indication information to the power supply device, wherein the indication information indicates that the power supply device adjusts an output current of the power supply device according to the target impedance.

In some examples, a circuit is configured to receive an input signal and deliver, based on the input signal, a charging current to a capacitor. The circuit may be further configured to receive an output voltage that indicates a charge on the capacitor. The circuit may be further configured to determine that the output voltage is shorted to a reference ground. The circuit may be further configured to reduce, based on determining that the output voltage is shorted to the reference ground, the charging current.

Wireless transceivers, and associated methods and computer-readable media, for enabling wireless power signals to be used for operating and/or charging a battery of existing or newly designed rechargeable electronic devices. A method making use of the wireless transceivers according to the present technology may include the step determining, by a circuit, whether or not an output power associated with a voltage induced in response to the circuit receiving a wireless power signal meets a power requirement of another circuit coupled to the circuit. When the output power meets the power requirement, a first current may be transmitted from the circuit to the another circuit and the battery coupled to the circuit. Alternatively, when the output power does not meet the power requirement, a second current may be transmitted from the circuit to the another circuit, and a third current may be transmitted from the battery to the another circuit.

A method for charging rechargeable cells, in particular lithium ion cells. An apparatus for charging such cells. In order to specify a method for charging a lithium-based cell and an apparatus for charging a lithium-based cell, in which the capacitance of the cell is optimally used, the charging time is drastically shortened, the shelf life of the cell is extended and/or it is possible to increase the capacitance of the cell, a method is stated which includes the following steps, pulsed charging of the cell, wherein the charging current I.sub.L exceeds the nominal charging current I.sub.Lmax of the cell during the charging pulses; and the cell is discharged between the charging pulses using load pulses.

A battery pack charger includes a first circuit region, a second circuit region, an input voltage measuring circuit, a temperature measurement device, and a controller. The controller is configured to measure an input voltage to the charger using the input voltage measuring circuit, measure a temperature of the second circuit region using the temperature measurement device, and estimate a temperature of the first circuit region based on the input voltage to the charger and the measured temperature of the second circuit region. The controller is further configured to select one of a plurality of correlations between the temperature of the second circuit region and the temperature of the first circuit region based on the input voltage to the charger to estimate the temperature of the first circuit region. After the temperature of the first circuit region has been estimated, one or more control operations associated with the charger can be performed.

A charge control device of one example of the present invention comprises a temperature detection unit, a storage unit, and an upper limit setting unit. The storage unit stores a reference current characteristic and at least one of a first current characteristic and a second current characteristic as a charging current characteristic, and stores a reference voltage characteristic and at least one of a first voltage characteristic and a second voltage characteristic as a charging voltage characteristic. The upper limit setting unit selects a characteristic used to set upper limits of a charging current and a charging voltage to the battery from among a plurality of the charging current characteristics and a plurality of the charging voltage characteristics stored in the storage unit.

Systems and methods for power management are disclosed. In an embodiment, a battery charging system includes closed-loop control of a battery charger using a servo target based on measurements taken by a battery gauge.

A power supply apparatus has a first electric storage section, a second electric storage section having an excellent energy density and a poor output density compared with the first storage section, and a control section that acquires first data and second data before and after each time of transferring charge between the first and storage sections, the first data being a combination of an SOC and an OCV of the first storage section, the second data being a combination of an SOC and an OCV of the second storage section, estimates a first correlation between the SOC and the OCV of the first storage section from an aggregation of the first data including reference data, and estimates a second correlation between the SOC and the OCV of the second storage section based on a comparison between a plurality of stored data and an aggregation of the second data.