A method of obtaining battery capacity, includes: acquiring a voltage-capacity curve of a battery; performing differentiation on the voltage-capacity curve to obtain a voltage differential-capacity curve; identifying wave crests in the voltage differential-capacity curve; calculating heights and widths between each wave crest and the adjacent wave trough on the left and the right; calculating a determination index p according to the heights and the widths; determining a voltage knee point in the voltage-capacity curve according to a wave crest with a minimum determination index; acquiring a reference capacity value corresponding to the voltage knee point in the voltage-capacity curve; after the battery reaches a full-charge state, acquiring charging electric energy of the battery for charging from the voltage knee point to the full-charge state; and obtaining a capacity of the battery based on a sum of the reference capacity value and the charging electric energy.

The present disclosure relates to a method of controlling charging of a battery. The method includes generating electrode potential data based on a current profile and a voltage profile of a target battery, calculating a correlation between the electrode potential data and lifespan data of the target battery, predicting the lifespan of the target battery based on the correlation, and controlling a charging speed of the target battery based on the predicted lifespan of the target battery.

Disclosed herein are systems and methods for charging batteries of audio playback devices. An example method performed by a media playback system includes receiving power from a first power source to charge a first power storage of a first playback device according to a first charging scheme, and receiving power from a second power source to charge a second power storage of a second playback device according to a second charging scheme. The system receives an instruction to form a group for synchronous audio playback, and obtains one or more power parameters associated with the first playback device and/or the second playback device. After receiving the instruction to form the group, the system modifies the first charging scheme based on the one or more power parameters, and then receives power from the first power source to charge the first power storage according to the modified first charging scheme.

A secondary battery system is a secondary battery system including a battery bank including a battery rack including a plurality of battery cells connected in series and a power converter for charging and discharging a power system by one or a plurality of the battery racks connected in parallel, the secondary battery system includes a switch that enables the battery rack included in the battery bank to be switched to a power converter of another battery bank; and a controller that monitors a deterioration rate or an age of use of the battery rack and controls the power converter and the switch, in which the controller instructs the switch about a power converter to be connected based on the deterioration rate or the age of use of the battery rack.

A battery management apparatus, a battery pack, an electric vehicle and a battery management method are provided. The battery management apparatus according to the present disclosure includes a controller configured to obtain a plurality of cell state parameters indicating electric states of the plurality of battery cells; determine whether to perform a balancing process, which is a procedure of selectively discharging or charging each of the plurality of battery cells, to suppress a deviation in electric states among the plurality of battery cells; and perform the balancing process for at least one battery cell among the plurality of battery cells, based on the plurality of cell state parameters.

An energy storage system may include one or more first battery racks, one or more second battery racks, one or more DC/DC converters configured to manage the one or more second battery racks respectively, and a battery system controller configured to monitor outputs of the one or more first battery racks and outputs of the one or more DC/DC converters, and to control the outputs of the one or more DC/DC converters. Tye one or more second battery racks and the one or more DC/DC converters are additionally installed in the energy storage system after the first battery racks are installed in the energy storage system to augment the first battery racks.

A control method of power supply for a portable electronic device is disclosed. The portable electronic device includes a power supply module and a control circuit, and the power supply module is configured to provide electric power to the portable electronic device. The control method of power supply includes detecting, by the control circuit, a system status of the portable electronic device or a module status of the power supply module; and adjusting, by the control circuit, a reserved battery capacity of a main battery of the power supply module according to the system status of the portable electronic device or the module status of the power supply module.

A method for determining charging profiles for device batteries of battery-operated devices. In one instance, the method includes selecting device batteries having the same usage-related load and the same aging state; dividing the selected device batteries into groups; assigning different charging profiles to the groups of device batteries, wherein the charging profiles indicate for a charging operation a maximum permissible charging current depending on a charge level range; operating the device batteries of all groups with the respectively assigned charging profiles for a predetermined period of time, so that charging operations are executed depending on the respectively assigned charging profile; detecting a change in the average aging state for each group of device batteries between the beginning of the predetermined time period and the end of the predetermined time period; and adjusting the charging profile depending on the change in the average aging state.

A method for determining charging profiles for device batteries of battery-operated devices. In one instance, the method includes selecting device batteries having the same usage-related load and the same aging state; dividing the selected device batteries into groups; assigning different charging profiles to the groups of device batteries, wherein the charging profiles indicate for a charging operation a maximum permissible charging current depending on a charge level range; operating the device batteries of all groups with the respectively assigned charging profiles for a predetermined period of time, so that charging operations are executed depending on the respectively assigned charging profile; detecting a change in the average aging state for each group of device batteries between the beginning of the predetermined time period and the end of the predetermined time period; and adjusting the charging profile depending on the change in the average aging state.

A battery pack includes: a sensor that generates sensor data indicating an operating parameter of the battery pack; and an electronic controller including a machine learning program. The electronic controller is configured to: receive the sensor data; process the sensor data using the machine learning program, where the machine learning program includes a trained neural network model; and use the machine learning program to generate an output based on the sensor data, where the output indicates at least one of a state of charge (SOC), a state of temperature (SOT), a state of health (SOH), and a state of power (SOP) of a cell. The effective utilization of a battery is improved.