The present disclosure is directed to charging a battery pack by measuring an electrical impedance value of a battery pack by applying a sinusoidal AC excitation signal to a plurality of battery cells of the battery pack, measuring a total impedance value of the battery pack, obtaining a chemical impedance value of the battery pack based on the electrical impedance value and the total impedance value, and adjusting a charge current applied to the battery pack based on the chemical impedance value of the battery pack.

In a power storage pack, a power storage unit supplies electric power to an electric mobile body. A wireless communication unit performs short-range wireless communication. A notification unit presents, to a user of a mobile terminal device, a tentative notification of a verification code that is to be used in the process of exchanging an encryption key that is to be used for the short-range wireless communication with the mobile terminal device. The notification unit may include a remaining capacity display for the power storage unit.

A portable power station is disclosed. The portable power station includes an illumination device including a device body, and a light source configured to emit a light through an optically transmissive portion of the device body. The portable power station further includes a housing including a middle portion between a bottom portion and a top portion. The portable power station further includes a device holder configured to be positioned on the top portion and support the device body in an operative position. The portable power station further includes a diffuser configured to be removably mounted to the device body in the operative position. The portable power station further includes a first receptacle disposed on the middle portion and configured to removably receive and secure the device body, such that the optically transmissive portion remains at least partially uncovered, and a second receptacle configured to removably receive and secure the diffuser.

There may be provided a cable management system for an electric vehicle charger. The cable management system may include a mechanical wire coupled to a charging cable associated with the electric vehicle charger and an enclosure. The cable management system may include a wire tension sensor engaging the mechanical wire. The wire tension sensor may generate a sensor output based on a force applied to the mechanical wire. The wire retractor may be configured to retract the mechanical wire into the enclosure and extend the mechanical wire from the enclosure. The cable management system may include a controller coupled to the wire tension sensor. The controller may be configured with instructions which, when executed, cause the controller to control the wire retractor based on an amount of force applied to the mechanical wire.

A neck fan includes a hanging main body and a first fan assembly. The hanging main body includes an inner end portion that is in contact with the neck of a user. The first fan assembly includes a straight-tube-shaped first fan shell. The first fan shell is connected to a lower end portion of the hanging main body; the first fan shell is provided with a third air inlet and a third air outlet; and the first fan assembly is configured to drive air flow to be blown from the third air inlet towards the inner end portion via the third air outlet.

A processor of a battery apparatus estimates an internal resistance of a battery at a reference temperature based on a measured voltage of the battery, a measured current of the battery, an open circuit voltage of the battery, and a measured temperature of the battery, and estimates a resistance state of the battery based on the estimated internal resistance and a beginning of life (BOL) resistance at the reference temperature when the battery is in a BOL state.

A vehicle charging system comprises at least one controller and at least one arm, each arm having a first end coupled to an actuator and a second end comprising a charging interface. The actuator is configured to articulate the arm into a charging position. The charging interface comprises at least one charging contact coupled to a power source and configured to engage and deliver power to a vehicle charging interface to charge at least one battery of a vehicle. The charging system can include a plurality of arms, each configured to charge a different vehicle. A method of charging one or more vehicles using the charging system is also provided.

A battery system for a machine includes one or more battery module cell bus bars, one or more terminal bus bars, an interconnect system, and a battery module circuit. The one or more terminal bus bars include a coupling configured to couple the battery system to one or more components of the machine. The interconnect system couples the one or more battery module cells to the one or more terminal bus bars. The battery module circuit is coupled to one or more portions of the interconnect system. The battery module circuit includes one or more thermistors positioned at least partially overlapping with the one or more terminal bus bars.

A system for charging a battery is provided. The system including a battery, a sterile barrier for encasing the battery, a charging device including a charging bay, and a charging controller. The battery includes a battery controller. The charging bay includes a first antenna for establishing communication with a battery controller of the battery encased in the sterile barrier in response to the battery being within a proximity of the charging bay and a second antenna for providing charging power to the battery encased in the sterile barrier. The charging controller establishes communication with the battery controller while the second antenna is deactivated, activates the second antenna after the first antenna establishes communication with the battery controller, and provides charging power to the battery via the second antenna.

A battery control apparatus may include a power supply unit connected to a charging and discharging path of a battery, a driving unit configured to operate the power supply unit by applying a starting power to the power supply unit during a preset starting time from the charging and discharging path, a switching unit connected between the charging and discharging path of the battery and the power supply unit, and a control unit configured to turn on the switching unit in response to that a first operation power output from the power supply unit is applied, and to be driven through a second operation power generated by the power supply unit after the starting time.