A charging method comprises: in response to a charging request sent by a device, acquiring a state of charge of an energy storage apparatus, and comparing a charging power of the device with a first supply power of a first charging module corresponding to a charging gun connected to the device; in response to the first charging module not meeting a power supply requirement, determining power to be allocated based on the charging power and the first supply power; based on a second supply power of each second charging module and the power to be allocated, determining at least one second charging module that meets an allocation condition as a target charging module; in response to the state of charge being less than a preset threshold, disconnecting an energy storage switch to supply power to the first charging module and the target charging module through a power grid.

An adjustment unit of an on-board backup control apparatus controls a first charge/discharge unit corresponding to a first power storage portion such as to supply charge current to the first power storage portion in a first state during a first period and perform constant voltage charging with respect to the first power storage portion during a second period following the first period. The adjustment unit controls a second charge/discharge unit corresponding to a second power storage portion such as to establish a second state with respect to the second power storage portion during the first period and supply charge current to the second power storage portion in a third state during the second period, charge current being suppressed in the second state compared to in the first state and being increased in the third state compared to in the second state.

A method for charging an energy storage device includes receiving battery information representing the state of the battery, and ascertaining the state of charge, the cell temperature, and the cell resistance of the energy storage device. On the basis of the battery information, the state of charge, the cell temperature, and the cell resistance of the energy storage device, a charging factor is ascertained. The charging capacity is ascertained on the basis of the charging factor, and the energy storage device is charged using the ascertained charging capacity.

The invention relates to activating an active discharge of a DC link capacitor. To this end, provision is made of a discharge device which can detect a condition for activating the discharge of a DC link capacitor independently of other system components and thus can initiate an active discharge of the DC link capacitor. To this end, the voltage across the DC link capacitor is evaluated and the active discharge of the DC link capacitor is enabled if a gradient of the voltage across the DC link capacitor falls below a predefined threshold value.

A battery conditioning system and method configured to shorten charging time and block energy consumption due to unnecessary conditioning by performing battery pre-conditioning in a timely manner through collecting customer charging tendency data, etc., using big data and generating a charging scenario by combining charge-inducing factors to perform pre-conditioning.

A method for operating a battery converter in a system includes controlling an exchange power of the battery converter using a battery, which is connected to the battery converter, depending on a voltage of the intermediate circuit in accordance with a converter characteristic curve, identifying a decrease in the intermediate circuit voltage below a rectifying value of the permissible AC voltage of the grid connected to the inverter, and when the decrease is identified, temporarily shifting the converter characteristic curve so that a maximum discharging power of the battery converter is reached at a value of the intermediate circuit voltage that is above or at the rectifying value. A battery converter and a system having such a battery converter are also described.

A battery management system includes a sensing unit to generate a sensing signal indicating a battery voltage and a battery current of a battery, a memory unit to store a charge map recording a correlation between first to n.sup.th reference state of charge (SOC) ranges, first to n.sup.th reference currents and first to n.sup.th reference voltages for multi-stage constant-current charging, and a control unit to change to constant voltage charging using a k.sup.th reference voltage corresponding to a k.sup.th reference SOC range in response to the battery voltage having reached the k.sup.th reference voltage during constant current charging using a k.sup.th reference current corresponding to the k.sup.th reference SOC range to which an SOC of the battery belongs. The control unit updates the k.sup.th reference current of the charge map based on a time-series of the battery current in a charging period of the constant voltage charging.

Disclosed is a method for controlling battery charging/discharging current in an off-grid mode of a hybrid energy storage inverter that is based on photovoltaic and a lithium battery. If photovoltaic energy is sufficient and a battery is not fully charged, the photovoltaic energy is supplied to a load and excess energy is supplied to the battery, to achieve maximum power point tracking of an output power of a photovoltaic component achieves maximum power point tracking; if photovoltaic energy is sufficient and a battery has been fully charged, the photovoltaic energy is supplied to a load, the excess photovoltaic energy is prohibited from charging the battery to prevent overcharging of the lithium battery; if photovoltaic energy is insufficient, the photovoltaic energy and battery energy are jointly supplied to a load, to achieve maximum power point tracking of an output power of a photovoltaic component.

The control device includes a charger to which electric power is distributed from the distribution board, an acquisition unit for acquiring power consumption of one or more electric devices, an instruction unit for instructing suppression of the charging operation of the charger in accordance with the power consumption based on an instruction authority of the charging operation for the charger, and a management unit for giving the instruction authority to the power management device that manages power demand using the charger when the power consumption is equal to or less than a first threshold, and giving the instruction authority to the instruction unit when the power consumption is greater than the first threshold.

A wireless power transfer facility includes: a power factor correction device that converts AC front-stage input power received from a commercial power source into DC front-stage output power and has a plurality of output terminals for outputting the front-stage output power; a plurality of inverters that are respectively connected to the output terminals of the power factor correction device and convert DC rear-stage input power including the DC front-stage output power received from the output terminals into AC rear-stage output power; a plurality of power transmission coils that are respectively connected to the plurality of inverters and receive the rear-stage output power; and a control device that performs control so that the front-stage input power output to the power factor correction device does not exceed allowable power of the commercial power source.