A battery system including a number of first battery modules each including a number of battery cells, and a number of second battery modules each including a number of battery cells. Each second battery module includes a power electronics unit having a DC/DC converter. The first and second battery modules are connected in series. The first battery modules are connected directly in series and the second battery modules are connected via their power electronics units.

Method for controlling a battery system that includes a battery with at least one string of battery modules connected in series. Each battery module including a number of battery cells connected in parallel and/or in series. At least a number of battery modules including a power electronics unit connected in series via their respective power electronics unit. The power electronics unit having a DCDC converter operable at least in buck mode, boost mode, and bypass mode. The method includes specifying a DC link voltage for the battery; specifying a first distribution of the set DC link voltage for all modules; determining a state of charge and/or a temperature for all modules; determining a deviation of the state of charge and/or of the temperature of each module from an average value; specifying a second distribution of the set DC link voltage. The set voltage for each module is corrected depending on deviation of state of charge and/or of temperature of each module from the average value.

A power storage apparatus includes a plurality of power storage modules connected in series and a control apparatus that controls each power storage module. The power storage module includes a battery section, a controller, a communication unit, a first insulator that insulates the controller from the communication unit, and a second insulator having a withstand voltage higher than a withstand voltage of the first insulator. The second insulator is provided between the communication unit of each power storage module and the control apparatus.

In accordance with disclosed embodiments, a power conversion system and method are provided. The power conversion system comprises a main power source configured to deliver drive power to a load and an add-on power module. The add-on power module comprises an isolated DC/DC converter and a low voltage source coupled in series with a high voltage source. The add-on power module is coupled to the main power source and the load and configured to output boost power to the load. The power conversion system further comprises a controller coupled to the main power source and the add-on power module, wherein the controller is configured to: determine that the load requires power from the main power source, and if so, direct boost power from the add-on power module to the load; and direct drive power from the main power source to the load when boost power falls below a predetermined threshold.

A battery pack management device capable of reducing power consumption while transmitting and receiving data between a master BMS and a slave BMS by using a wireless communication method. The battery pack management device according to the present disclosure includes: a master BMS including an external communicator, an internal communicator, and a master controller and a slave BMS including a power supply, a state measurement sensor, a slave wireless communicator, and a slave controller.

There are provided an energy storage system and a method for driving the energy storage system, which can exactly measure discharge current by calculating measurement times of the discharge current according to the frequency of the discharge current. An energy storage system includes a battery rack, a battery management system configured to control charging and discharging of the battery rack, and a power conversion system configured to supply discharge current of the battery rack as an alternating current having a frequency to the battery management system. The battery management system is further configured to calculate measurement times of the discharge current, measure the discharge current at the calculated measurement times, and control the charging and discharging of the battery rack based on the measured discharge currents.

Systems and methods for battery management are disclosed. A system may include an internal control network including multiple node controllers powered by a unique cell or combination of cells of a battery. The node controllers may communicate with each other via a node communication system. Each node controller may be responsible for managing a charge level associated with one or more cells. The one or more devices of the internal control network may enable measurement of environmental factors such as a temperature and a current and voltage applied at the battery. Based on the measured environmental factors, the internal control network may perform an ongoing assessment of the one or more cells of the battery and of an overall battery condition. The internal control network may initiate turning on or off a battery output to prevent over discharge and possible damage to the battery or devices connected to the battery.

The present disclosure provides a charging and discharging method for series-parallel batteries applied to a series-parallel battery system including series-parallel batteries and a mainboard, the series-parallel batteries are connected to the mainboard and include at least two batteries that are connected to each other, and the method includes: determining and adjusting a connection mode of each battery of the series-parallel batteries according to a charging or discharging demand type; and charging or discharging the series-parallel batteries according to the connection mode of each battery of the series-parallel batteries. The present disclosure further provides a series-parallel battery system.

A power generating system architecture includes a prime mover, a generator component including a switched reluctance generator, the switched reluctance generator being mechanically coupled to the prime mover and having a plurality of stator pole windings, a DC power bus connected to at least one output of the switched reluctance generator, the DC power bus including a positive bus bar and a negative bus bar, at plurality of series arranged energy storage devices connecting the positive bus bar and the negative bus bar, a plurality of state of charge modules connected to the plurality of energy storage devices, each of the state of charge modules being communicatively coupled to a generator controller, and the generator controller being configured to independently control each of the stator pole windings.

A power system architecture includes a prime mover, a plurality of single phase permanent magnet generators mechanically coupled to the prime mover, a DC power bus including a plurality of DC power storage components, each of the DC energy storage components being electrically connected to at least one of the single phase permanent magnet generators, a plurality of state of charge calculators, each of the state of charge calculators being connected to one of the DC energy storage component and being communicatively coupled to a generator control unit, and wherein the generator control unit is configured to independently control each of the single phase permanent magnet generators.