A battery charging apparatus includes a first converter having an input coupled to an input voltage bus and an output coupled to a first battery, and a second converter having an input coupled to the input voltage bus and an output coupled to the first battery and a second battery through a first bidirectional current blocking switch and a second bidirectional current blocking switch, respectively.

A charging circuit applied to a first electronic device includes a charging interface, a charging module coupled therewith and configured to detect a connection between the charging interface and a second electronic device, and adjust a current output to the second electronic device, a reverse charging protocol module, and a control module. The reverse charging protocol module is configured to determine a reverse charging protocol matched with the charging current of the second electronic device. The control module is coupled with the charging module and the reverse charging protocol module, and configured to acquire the reverse charging protocol determined by the reverse charging protocol module in response to the connection between the charging interface and the second electronic device, and control the charging module to adjust the current output to the second electronic device based on the reverse charging protocol. The charging circuit can increase the reverse charging current.

A state estimator estimates, based on at least one of a voltage, a current, and a temperature of a secondary battery, a state of the secondary battery including a state of charge (SOC) of the secondary battery. A discharge controller discharges, when a state of non-use of the secondary battery lasts for a predetermined period of time, the secondary battery such that an indicator indicating easiness of storage deterioration of the secondary battery to progress decreases in stages. The indicator includes a parameter that depends on an SOC of the secondary battery. A value of the indicator and a duration of stay in each stage are set such that a predetermined relationship holds between products in a plurality of stages, each of the products being derived from multiplying the value of the indicator and the duration of stay in each stage.

A battery charging method is disclosed. The method includes: obtaining historical working durations in which the electronic device was powered by a battery of the electronic device; in response to an electronic device connected to a charging power source, obtaining a remaining battery level and a target capacity of a battery of the electronic device, and accordingly defining a capacity to be charged; obtaining a current system time when the electronic device is connected to the charging power source; obtaining a specific time difference between the current system time and a predicted working duration, wherein the predicted working duration is a specific working duration chosen from the historical working durations subsequent to the current system time; and using the capacity to be charged to correspond to the specific time difference to obtain a predicted charging current value.

An electronic device is provided. The electronic device includes a housing, a power interface exposed through at least a portion of the housing to be connected to an external power source in a wired manner or disposed inside the housing to be connected to the external power source in a wireless manner, at least one battery disposed inside the housing and electrically connected to the power interface, a processor disposed inside the housing and operatively connected to the power interface, and a memory disposed inside the housing and operatively connected to the processor. The memory stores instructions that, when executed, causes the processor to, in a state in which an external power is supplied through the power interface, when a voltage of the battery reaches a first voltage value, lower the voltage of the battery to a second voltage value lower than the first voltage value by discharging the battery after a first time has elapsed from a time point at which the voltage of the battery reaches the first voltage value.

A server includes a charge schedule creation unit that creates a charge schedule for external charging of a vehicle. When user-specified-time information for determining a time to perform the external charging is not given by a user of the vehicle, the charge schedule creation unit creates a first charge schedule. When the user-specified-time information is given, the charge schedule creation unit creates a second charge schedule. In the first charge schedule, a battery mounted in the vehicle is pre-charged with some of power to be charged to the battery, and, after the pre-charging is performed, the battery is charged with a remaining amount of the power during a time period in which an electricity cost is inexpensive. In the second charge schedule, the battery is charged, without the pre-charging being performed.

A method for managing state of charge of a battery of an electric work vehicle to be ready to return to work at a return to work time that coincides with an end of a duration of immobilization. A charge mode is selected via a user interface. An initial state of charge of the battery and a target operational state of charge of the battery are used to calculate a targeted charge increase. A charge cycle comprising a charge rate is selected based on the charge mode and the targeted charge increase. A charging start time is calculated such that at the return to work time an actual state of charge of the battery corresponds to the target operational state of charge. The temperature of the battery is adjusted to be a target temperature at the charging start time. The charge cycle is started at the charging start time.

A method for battery charging includes performing a first-constant-current charging the battery with a constant current having a first intensity, determining a voltage of the battery rises above a first voltage level, performing a second-constant-current charging of the battery with a constant current having a second intensity that is less than the first intensity, determining a voltage of the battery rises above a second voltage level that is higher than the first voltage level, performing a third-constant-current charging the battery with a constant current having a third intensity that is less than the second intensity, determining a voltage of the battery rises above a third voltage level that is higher than the second voltage level, performing a constant voltage charging the battery with a constant voltage having the third voltage level, determining a charging current of the battery falls to a fourth intensity that is less than the third intensity.

Provided is a charging system including: a second power transmission unit; a moving mechanism that moves the second power transmission unit within a moving area including prescribed ranges within a plurality of parking spaces; and a power transmission control unit that, when a first electric vehicle is parked in a first parking space as one of a plurality of parking spaces, moves the second power transmission unit into the prescribed range of the first parking space by the moving mechanism to cause the first power transmission unit mounted to a first electric vehicle and the second power transmission unit to face each other so as to transmit power to the first power transmission unit from the second power transmission unit wirelessly to execute vehicle charging processing for charging the first electric vehicle.

An automated vehicle battery preconditioning system and method that receive battery state-of-charge and battery preconditioning time information from a vehicle battery management system of each of a plurality of vehicles and battery charging time and charging power information from a battery charger management system and, based on the information, generate a battery charging schedule and a battery preconditioning schedule for the plurality of vehicles; direct the battery charger management system to charge a battery of each of the plurality of vehicles according to the battery charging schedule; and direct the vehicle battery management system of each of the plurality of vehicles to precondition the associated battery according to the battery preconditioning schedule. The vehicle battery preconditioning system and method further receive power grid schedule and cost information and, based on the information, generate the battery charging schedule and the battery preconditioning schedule for the plurality of vehicles.