A degradation-determination system includes a volume change detecting unit configured to detect a volume change of a lithium-ion battery, a capacity change detecting unit configured to detect a capacity change of the lithium-ion battery, and a charge control unit configured to control charge of the lithium-ion battery. The charge control unit is configured to determine that the lithium-ion battery is in a state of degradation, upon occurrence of a condition in which volume expansion of the lithium-ion battery is detected by the volume change detecting unit, in conjunction with a condition in which a decrease in a capacity of the lithium-ion battery is not detected by the capacity change detecting unit.

A battery control system includes a secondary battery producing gas inside thereof when being used; and a control unit that controls charging/discharging of the secondary battery. The control unit includes a capacity measuring unit that measures capacity of the secondary battery being deteriorated with the use of the same; and a stop commanding unit that stops charging/discharging of the secondary battery, when the capacity measured by the capacity measuring unit is less than or equal to a predetermined threshold.

The present invention relates to a method for determining a section in which generation of internal gas in a second battery accelerates, the method comprising the steps of: measuring a closed circuit voltage (CCV) and an open circuit voltage (OCV) according to the state of charge (SOC) of the secondary battery while charging the secondary battery; deriving a closed circuit voltage (SOC-CCV) profile according to the state of charge and an open circuit voltage (SOC-OCV) profile according to the state of charge; and determining, from the derived SOC-CCV profile and SOC-OCV profile, a section in which the amount of internal gas generated in the secondary battery rapidly increases.

A method, an apparatus and a system for controlling charging of a battery module are provided in the present disclosure. The method for controlling charging of the battery module may include: acquiring an internal pressure value of the battery module; determining a target pressure threshold range to which the acquired internal pressure value of the battery module belongs, based on a plurality of predefined pressure threshold ranges; obtaining a target charge cutoff voltage corresponding to the target pressure threshold range, based on a correspondence relationship between a plurality of predefined charge cutoff voltage and the plurality of predefined pressure threshold ranges; and controlling the battery module to be charged based on the obtained target charge cutoff voltage.

Provided is an energy storage apparatus capable of appropriately controlling use of a silicon material in normal times and achieving long life, and a method of using the energy storage apparatus. One aspect of the present invention is an energy storage apparatus that includes an energy storage device and a measuring section for measuring an internal pressure change rate of the energy storage device, the energy storage device having a negative electrode that contains a carbon material and a silicon material. Another aspect of the present invention is a method of using the energy storage apparatus that includes performing discharge while the internal pressure change rate of the energy storage device is measured.

A method for controlling charging of a terminal device includes determining whether there is a need to switch from a first charging chip currently charging a battery of the terminal device to a second charging chip waiting to charge the battery, and controlling the first charging chip to stop charging the battery and starting the second charging chip to charge the battery if it is determined that there is the need to switch.

Aspects of the present disclosure include methods of charging secondary lithium metal batteries that include selectively and intentionally overcharging the battery to activate redox shuttling additives in order to reactivate dead lithium. Aspects of the present disclosure also include control systems for determining when to initiate a lithium reactivation charging process and for determining one or more parameters of a lithium reactivation charging protocol.

A battery charging system including a battery is provided. The battery includes a plurality of battery cells that are stacked and a pressure sensor that is configured to detect a pressure caused by swelling of the battery cells. A charger supplies charging power to the battery and a controller determines whether to supply the charging power from the charger and whether the battery is overcharged based on a change in the pressure per hour, detected by the pressure sensor, when the charger supplies the charging power to the battery.

A charging control system for a battery includes a temperature sensor, a voltage sensor, a pressure sensor, and a controller. The controller is configured to determine a threshold pressure change associated with a full charge of the battery based on map data selected from a predetermined data map associated with the battery, monitor a present voltage value obtained by the voltage sensing means and a total pressure change based on a present pressure value obtained by the pressure sensing means, continue the charging process when the present voltage value exceeds an upper limit voltage value, and total pressure change is less than threshold pressure change, and terminate the charging process when the present voltage value exceeds the upper limit voltage value, and the total pressure change is greater than or equal to the threshold pressure change.

A portable communication device, according to various embodiments of the present disclosure, may include: a battery pack; a power dissipation element disposed outside the battery pack; a detecting circuit configured to detect the state of the battery pack; and at least one of first switches that are connected to the battery pack and the detecting circuit, wherein the detecting circuit is configured to control at least one of the first switches to: electrically disconnect the power dissipation element from the battery pack when the state of the battery pack does not satisfy a specified condition; and electrically connect the power dissipation element to the battery pack when the state of the battery pack satisfies the specified condition.