Various embodiments are described that relate to charging a battery set. The battery set can comprise a first battery and a second battery. The batteries can be alternately charged so they are balanced. In one example, when the first battery is charged, then the second battery is not charged and vice versa. The alternation of charging can be managed based on different criteria, such as timing or charge level.

A management method for a battery system having parallel battery packs includes a charging control operation of sequentially closing battery packs having a low voltage value level and completing a charging of the battery packs. The purpose of the present invention is to provide a management method for a battery system having parallel battery packs which is applicable to multiple parallel battery packs being charged in parallel, to solve the technical problems that a safe and stable operation of the entire battery packs cannot be ensured caused by the failure of the battery packs, and excessive current impact may be generated due to an excessive voltage difference among the battery packs.

Fluctuations in the battery life of a plurality of storage batteries are reduced. A DC power supplying system includes power conditioners that supply generated power of power generators to a DC bus, converters that perform voltage conversion on a bus voltage and supply load power to load appliances, bidirectional converters that execute charging operations that charge storage batteries and discharging operations that discharge the storage batteries, and an energy management system that causes the converters to execute a charging operation when the generated power exceeds the load power and to execute a discharging operation when the generated power is below the load power. During a charging operation, the energy management system applies a first voltage-current characteristic that linearly increases the charging current in keeping with an increase in the bus voltage to each bidirectional DC/DC converter with a slope in keeping with the SOC of a storage battery.

In a storage system including a plurality of battery units, the charge/discharge amounts of the battery units are determined by predetermined computation using the state of charge (SOC). The predetermined computation includes allocating a larger discharge amount to a battery unit higher in SOC, out of the battery units, in the discharge mode, and allocating a larger charge amount to a battery unit lower in SOC, out of the battery units, in the charge mode.

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.

Flying machines may be docked during charging or other processes. A tray having multiple docking areas is configured to accommodate flying machines for transport and docking. The docking areas may, but need not, include passageways which may accommodate charging stations. For example, a storage enclosure may be configured to house one or more trays, configured to interface to corresponding charging surfaces. Protective layers and vibration dampening features may be used to soften impacts during storage and transport. A charging station may include electrical terminals, recesses, and locating features for docking a flying machine.

An electrical energy storage system is provided in this dislosure, which includes: M battery packs; M first DC/DC converters, where first terminals of the M first DC/DC converters are respectively connected to the M battery packs, the M first DC/DC converters are classified into N first DC/DC converter sets; and N second DC/DC converters, where the N second DC/DC converters one-to-one correspond to the N first DC/DC converter sets, a first terminal of each second DC/DC converter is connected to second terminals of all first DC/DC converters in a first DC/DC converter set corresponding to the second DC/DC converter, a second terminal of each second DC/DC converter is connected to a first interface of the electrical energy storage system, the first interface is to receive a direct current from a power generation system or output a direct current to the power generation system.

A battery system includes a battery module that includes a plurality of battery cells, a monitoring unit configured to monitor a parameter of each of the battery cells, and a control unit configured to determine whether there is an abnormal battery cell in the battery module using the parameter, to calculate a reference voltage for balancing the battery cells when it is determined that there is an abnormal battery cell in the battery module, and to control cell balancing of the battery cells to an equalization target range.

A system and method for charging battery packs is provided. The system may include a charging pad comprising a power supply, a charging pad surface, and a microcontroller unit. The power supply may provide charging power. The charging pad surface may include a first charging region and a second charging region. The microcontroller unit may control delivery of charging power to the first charging region and the second charging region such that a device placed in contact with the first charging region is given a higher charging priority than a device placed in contact with the second charging region.

The present application discloses a battery equalization system, a vehicle, a battery equalization method, and a storage medium. The battery equalization system includes: a collection circuit; an equalization circuit; a controller; a charging branch circuit, connected to a charging device and a battery pack; and a first power supply branch circuit, connected to the charging device and the battery equalization system, and configured to supply power to the battery equalization system. When a state-of-charge of the battery pack is full and a cell in the battery pack needs enabling of equalization, the controller controls the charging branch circuit to disconnect, and controls the first power supply branch circuit to keep connected, so that an equalization module performs equalization processing on the cell that needs enabling of equalization.