An energy storage system includes N switch units and N battery packs connected in series. The N switch units are separately connected to two ends of the N battery packs in a one-to-one correspondence. Each of the N switch units is configured to: when the energy storage system is in a charging state and remaining power of a battery pack correspondingly connected to each switch unit meets a first preset condition, and/or when the energy storage system is in a discharging state and the remaining power of the battery pack correspondingly connected to each switch unit meets a second preset condition, perform disconnection processing on the battery pack correspondingly connected to each switch unit. The first preset condition includes being greater than or equal to a first preset power value. The second preset condition includes being less than or equal to a second preset power value.

A power system that is attachable to a helmet is disclosed. The power system provides power and data connections for helmet-mounted accessory devices and provides power to the accessory devices. The power system includes a base unit that is attachable to the helmet. The base unit includes a processor, an internal power source, and one or more cable interfaces. One or more accessory interfaces can each be attached to the helmet, connected to a cable interface, and connected to an accessory device. The base unit further include an interface for attaching a power module to the base unit. The power module includes one or more removable power sources. The base unit selectively provides, to an accessory device connected to an accessory interface, power from either the internal power source or from a removable power source.

A method for controlling a charging current limiting value for a battery management system. In one example, the method includes determining, for a measured temperature and a prescribed state of charge, reference currents for various time intervals; calculating a corresponding reference time constant for each reference current by using a model for the calculation of a mean value of a charging current based on a continuous current; constituting a diagram for the relationship between the reference time constant and the reference current; determining a predictive time constant by the comparison of a measured value of a charging current with the reference currents; calculating a predictive limiting mean value of the charging current; and calculating a first predictive limiting value i.sub.predS for a short predictive time t.sub.predS, a second predictive limiting value i.sub.predL for a long predictive time t.sub.predL, and a third predictive limiting value i.sub.predP for a continuous predictive time.

A method for carrying out a process for charging an appliance battery of an appliance, with the following steps: providing a charging profile that specifies a maximally permissible charging current for charging the appliance battery in a manner depending on a state of charge of the appliance battery; ascertaining a current state of health of the appliance battery; providing a reference state of health that predetermines a customary state of health for a calendrical age of the appliance battery; charging the appliance battery in a manner depending on a corrected maximally permissible charging current, the corrected maximally permissible charging current being ascertained by applying a correction value to the maximally permissible charging current, the correction value being determined in a manner depending on a correction function, depending on a difference between the reference state of health and the current state of health.

A controller discharges a traction battery according to power limits defined by output that is indicative of a state of charge of the traction battery and is updated by a bar delta filter according to a balancing current. The balancing current is associated with each cell of a string of series connected cells of the traction battery and represents a deviation of an estimated current through the cell from a total current of the string.

An electronic device and method are disclosed. The electronic device includes: a battery, a wireless power transfer (WPT) coil, wireless power transceiver circuitry, a charging circuit, and a processor electrically connected to the wireless power transceiver circuitry and the charging circuit. The processor implements the method, including: receiving first detecting power from an external electronic device, determining whether a reception voltage generated by the received first detecting power is higher than a first predetermined voltage value, based on detecting that the reception voltage is higher than the first predetermined voltage value, supplying power from the battery to the wireless power transceiver circuitry, outputting via the WPT coil, foreign object detecting power based on the supplied power, and based on detecting an electrical change in the foreign object detecting power caused by presence of a foreign object, determining that an error has occurred.

Automatically updating a full charge capacity (FCC) of a battery of an information handling system, the method including: determining that the SOC of the battery is less than the SOC threshold; determining that the time since the previous update of the FCC of the battery is greater than the time threshold; identifying configuration parameters for an update of the FCC of the battery; comparing the configuration parameters with current conditions of the battery; based on comparing the configuration parameters with current conditions of the battery, determining that the current conditions of the battery are within bounds of the configuration parameters; and in response to determining that the current conditions of the battery are within the bounds of the configuration parameters, updating the FCC of the battery.

Various embodiments of the present technology may provide methods and apparatus for a battery. The apparatus may be configured to prevent leakage current from the battery to a number of sub-systems by selectively operating switches that connect the battery to the sub-systems. Operation of the switches may be based on whether the battery is charging or discharging and the capacity of the battery.

A method and a system for identifying third-order model parameters of a lithium battery based on a likelihood function are provided, which relates to a method for estimating battery model parameters of a lithium battery under different temperatures, different system-on-chips (SOCs), and charge-discharge currents. The method includes the following steps. A third-order battery model of the lithium battery is established. A battery model output voltage U.sub.d and a total battery current I under different temperatures, different SOCs, and charge-discharge currents are collected. The likelihood function is adopted to construct an identification model, and the collected data is substituted into the identification model to calculate the battery model parameters. Identified parameters are substituted into the third-order battery model to obtain a battery terminal voltage to be compared with a measured terminal voltage. The operation method of the disclosure is simple and effective, and can accurately estimate internal resistance parameters of the lithium battery.

In a power supply device, switching section switch a connection between batteries to a series connection or a parallel connection. In a case where the connection between the batteries is switched from the series connection to the parallel connection to charge the batteries by an external charger, a controller does not switch the connection to the parallel connection, does not charge one battery having a larger voltage out of the batteries, and separately charges the other battery when a potential difference between a voltage of the battery and a voltage of the battery is a predetermined threshold value or higher; and the controller switches the connection to the parallel connection and charges the batteries when the potential difference is lower than the threshold value.