A battery management system may include a plurality of balancing resistors respectively forming balancing discharging paths of cells connected in series to each other, a plurality of balancing switches respectively connected between the cells and the balancing resistors, and configured to control cell-balancing of each of the cells, a voltage-detecting circuit for detecting respective cell voltages of the cells, and a battery controller for acquiring respective balancing capacities of the cells based on the cell voltages, for obtaining duty cycles of the balancing switches according to the balancing capacities, and for scaling the duty cycles of the balancing switches according to a sum of duty cycles of two adjacent cells from among the cells.

A battery pack includes a power supply conduction member to be electrically connected to a power supply, a power supply terminal connected to the power supply conduction member, a load conduction member to be connected to an electrical load, a load terminal connected to the load conduction member, a wiring pattern connecting the power supply terminal and the load terminal, and a switch provided in the wiring pattern. The power supply conduction member includes a plurality of power supply connection terminals that are mechanically and electrically connected to a plurality of power supply terminals, respectively, and the load conduction member includes a plurality of load connection terminals that are mechanically and electrically connected to a plurality of load terminals, respectively.

A storage cell control system configured to perform charge/discharge control for a plurality of storage cells under control based on a power adjustment request from a power system includes: a power storage capacity calculating means configured to calculate a current power storage capacity of the storage cell based on storage cell information of the storage cell; a target power storage capacity setting means configured to set a target power storage capacity in stopping an operation of the storage cell; a capacity degradation speed calculating means configured to calculate a current capacity degradation speed and a target capacity degradation speed with respect to each power storage capacity by applying the current power storage capacity and the target power storage capacity to capacity degradation speed correlation information set in advance; and a power distributing means configured to distribute power to the plurality of storage cells in such a manner that when it is assumed that t is an elapsed time from start of operation, a capacity degradation amount D.sub.SOCvaried(t) is a time integral value of a capacity degradation speed in a case where the capacity degradation speed varies according to a power storage capacity, and a capacity degradation amount D.sub.SOCfixed(t) is a time integral value of a capacity degradation speed in a case where the capacity degradation speed is fixed regardless of a power storage capacity, a capacity degradation amount minimization condition: a capacity degradation amount D.sub.SOCvaried(t)a capacity degradation amount D.sub.SOCfixed(t) is satisfied.

Provided is a battery balancing apparatus and method including determining state information of a battery unit based on battery quantity data of the battery unit, determining a balancing parameter of the battery unit based on a range comprising the state information, and controlling a balancing unit based on the balancing parameter.

A battery management system for monitoring battery cells of an uninterruptible power supply (UPS) coupled to a medical imaging load. The battery management system includes a first slave configured to obtain an operating parameter of a first battery cell. The first slave is configured to determine health of the first battery cell based at least in part on the operating parameter. The first slave is configured to generate a signal indicating the health of the first battery cell to communicate serially, via at least a second slave, to a master.

A power distribution and control module includes a digital data processor and associated memory module operating an energy management program or schema and a battery charging manager program thereon. The energy management schema is operable to determine an instantaneous configuration of the power and distribution and control module, to determine total instantaneous input power available, total instantaneous power demand by connected power loads and to allocate a portion of the input power to power the loads. Thereafter any unallocated power is allocated to charge rechargeable batteries using allocation criteria that are situationally variable.

A secondary power system is configured to connect to a motor vehicle having a powertrain comprising an engine and a first alternator. The secondary power system includes a second alternator connected to the engine, one or more electro-chemical storage devices coupled to the second alternator and configured to be charged by the alternator, and one or more inverter chargers. The inverter chargers may operate in a first mode to provide AC power to loads on the vehicle or in a second mode to receive alternative power and charge the storage devices. In an embodiment, the secondary power system includes multiple storage devices each comprising at least one electro-chemical storage pack and a logic. The storage devices are interconnected by a junction box. The logics within each storage device may selectively disrupt power flow from the junction box upon detection of an error condition.

An energy storage system stores potential energy and providing a regulated output of electrical energy for powering an electrical load. The system includes an array of storage capacitors including a plurality of storage capacitors coupled in series. A balance control device balances the voltage on each of the storage capacitors in the array. An input control device manages the input for charging the storage capacitor array. An output power supply has an input coupled to the storage capacitor array and provides regulated power to an electrical load. A power monitor device electrically decouples the storage capacitor array from the electrical load when the total voltage of the storage capacitor array falls below a preset minimum level.

The present invention relates to a battery cell balancing system and method using LC resonance. The present invention comprises: a drive unit including one or more battery cells connected in series, a resonance module for performing a resonant operation, and a switch unit provided so as to allow electric charges stored in the resonance module to be transferred to each of the one or more battery cells; and a control unit for measuring a resonance period of the resonance module according to a voltage state of each of the one or more battery cells, and transferring the electric charges charged in the resonance module to each of the one or more battery cells by controlling an on/off operation of the switch unit according to the measured resonance period.

A method and apparatus are disclosed for a Battery Management System (BMS) for the controlling of the charging and discharging of a plurality of battery cells (12). Each battery cell has an associated plurality of control circuits (32, 36) which monitor and control the charging of individual battery cells. These units are controlled by a central microcontroller (14) which shunts current around the battery cell if fully charged and stops discharge if a battery cell is fully discharged in order to prevent damage to the other cells.