A high voltage battery pack comprises series-connected battery units, each separately powering a respective DC/DC converter. The converter outputs are coupled in parallel to supply a low-voltage DC bus. A central module has 1) an outer loop controller generating a target current to regulate the bus voltage and 2) an allocator distributing the target current via allocated current commands for respective converters. Local controllers each regulate an output current of a respective converter. The allocator identifies battery units having a predetermined deviation from a reference metric that characterizes the battery pack, allocates reverse currents to respective converters for the identified battery units, and increases the target current commanded for the DC/DC converters not allocated to have a reverse current by the allocated reverse currents. Battery units with extremely low or high states as compared with the other units are quickly balanced, thereby improving overall performance of the battery pack.

A method of managing energy service for a plurality of assets of different types connected to a plurality of grid connection points includes determining, by a respective asset, a quantity of the energy service to be realized by the respective asset during a connection event; responsive to the respective asset being of a first type; detecting a grid connection point identifier that identifies an associated grid connection point associated with the respective asset of the first type used for the connection event; and sending, by the respective asset, connection event information, wherein the connection event information includes at least one of: the determined quantity of the energy service and an asset identifier, responsive to the respective asset not being of the first type; or the determined quantity of the energy service and the detected grid connection point identifier, responsive to the respective asset being of the first type.

An electronic device includes a housing, a display exposed through one surface of the housing, at least one ground member, a first battery disposed in the housing and including a first anode and a first cathode, a second battery disposed in the housing and including a second anode and a second cathode electrically connected with the ground member, a charging circuit electrically connected with the first battery and the second battery, a charging interface electrically connected with the charging circuit, and a power management integrated circuit electrically connected with the charging interface and the charging circuit and managing power supplied to the electronic device. When an external power source is connected through the charging interface, the charging circuit connects the first battery and the second battery in series during a first time period and connects the first battery and the second battery in parallel during a second time period.

Module-based energy systems are provided having multiple converter-source modules. The converter-source modules can each include an energy source and a converter. The systems can further include control circuitry for the modules. The modules can be arranged in various ways to provide single phase AC, multi-phase AC, and/or DC outputs. Each module can be independently monitored and controlled.

Module-based energy systems are provided having multiple converter-source modules. The converter-source modules can each include an energy source and a converter. The systems can further include control circuitry for the modules. The modules can be arranged in various ways to provide single phase AC, multi-phase AC, and/or DC outputs. Each module can be independently monitored and controlled.

Module-based energy systems are provided having multiple converter-source modules. The converter-source modules can each include an energy source and a converter. The systems can further include control circuitry for the modules. The modules can be arranged in various ways to provide single phase AC, multi-phase AC, and/or DC outputs. Each module can be independently monitored and controlled.

A power plant-connected energy storage system maintains frequency quality of power generated and supplied by a power plant. The system includes an electric energy storage unit that includes two or more batteries of different types and is configured to be charged or discharged to improve frequency quality of power output from the power plant; and a power conditioner configured to control of the power output from the power plant and to control charge and discharge at least one of the two or more batteries in accordance with the control of the power output from the power plant. The two or more batteries include a short cycle battery having a relatively short charge/discharge cycle and a long cycle battery having a relatively long charge/discharge cycle.

A drone is described. The drone includes a propulsion system, a transceiver, a tether connector, and a power system. The power system has a battery and a chopper circuit. The chopper circuit bleeds excess charge from the battery. The power system is configured to power the propulsion system, and to power the transceiver through the chopper circuit. The power system is also configured to receive electrical power, through the tether connector, to charge the battery while the drone is in the air.

Provided are a battery monitoring device capable of suppressing a current flowing to individual battery cells and enhancing the safety thereof, even when there is a short circuit, for example, in a connection line connecting substrates having integrated circuits mounted thereon and a substrate having a microcomputer mounted thereon or a connection line connecting the substrates having the integrated circuits mounted thereon, and a battery system using the same. Resistors are provided in a positive electrode input line 13a connecting a positive electrode side of a battery pack group 200 and a total voltage detecting unit 13 and/or a negative electrode input line 13b connecting a negative electrode side of the battery pack group 200 and the total voltage detecting unit 13 and the resistors of the positive electrode input line 13a and/or negative electrode input line 13b are arranged on individual cell monitoring circuit boards 31 and 32.

A system for balancing a battery assembly and related methods for making and using same are provided. The system can obtain a status of a battery assembly with a plurality of batteries. One or more of the batteries can be selected based on the obtained status, and the selected batteries can be balanced. The system, for example, can control active balancing of the selected batteries when the battery assembly is in a static state and control selective discharging of the selected batteries when the battery assembly is in a discharging state. When the battery assembly is in a charging state, selective charging of the selected batteries can be controlled. One or more cells that comprise the individual batteries alternatively can be selected for balancing. A protective circuit can help ensure safety of the balancing. Battery balancing can be energy-efficient and time-efficient. The lifetime of the battery assembly can be extended.