A charging circuit of an electronic device having a three-level converter, and a method and a device for controlling balancing in a charging circuit are provided. The electronic device includes a battery, at least one processor, and a charging circuit. The charging circuit includes, as a three-level converter, a switching circuit including multiple switching elements and a flying capacitor, and a filter circuit including an inductor and a capacitor. The charging circuit includes, as a balancing circuit, a balancing control circuit configured to, during balancing corresponding to a designated a mode, based on whether the balancing corresponds to targeted balancing, generate an output for maintaining or switching a balancing control direction configured for the designated mode, and a switching control circuit configured to perform switching for the switching elements in a balancing control direction corresponding to the designated mode, based on an output of the balancing control circuit, or perform switching for the switching elements in a direction reverse to a balancing control direction corresponding to the designated mode.

A power supply system comprises an alternating-current sweep unit that outputs alternating-current power from a U-phase battery string, a V-phase battery string, and a W-phase battery string that are Y-connected, a first power supply circuit that converts output of a direct-current sweep unit to alternating-current power using an inverter and outputs the alternating-current power, the direct-current sweep unit including a first battery string; and a control device. An energy density of a battery included in the U-phase battery string, the V-phase battery string, and the W-phase battery string is higher than an energy density of a battery included in the first battery string.

An energy storage system and a method for controlling an the energy storage system, includes a plurality of energy storage units. The energy storage unit includes a plurality of battery cells, a plurality of balancing units, a voltage conversion unit, a first switch, a second switch, and a control unit. The control unit is configured to detect fault cases of the plurality of battery cells, and control open and closed states of the first switch and the second switch. According to the application, it can be ensured that each energy storage unit in the energy storage system can continuously work when a battery cell is faulty and when state of charge balance between battery cells is implemented, thereby greatly improving reliability of the energy storage system with low costs.

A battery array comprising a plurality of battery modules each having one or more battery cells. The battery array comprises a plurality of switching elements configured to switch the one or more battery cells in circuit and out of circuit with the battery array, and a memory storing a connection map indicating an identifier associated with each of the plurality of battery modules, a location of one or more electrical outputs of the battery array, and interconnections between each of the plurality of battery modules. The battery array also comprises a module management unit coupled to the memory that controls the plurality of switching elements. The module management unit is in electronic communication with remaining battery modules of the battery array based on a data mesh architecture.

Disclosed herein is a switch assembly electrically couplable to a rechargeable power storage device (PSD). The switch assembly includes an electrical input A, an electrical output B, and first and second conduction paths there between, passing through, and circumventing, the PSD, respectively. A positive polarity of the PSD points from A to B. The switch assembly is switchable between: (i) a state, wherein current is capable of flowing from A to B simultaneously through the first and second conduction paths but is incapable of flowing from B to A the second conduction path, (ii) a state, wherein current is capable of flowing between A and B through the second conduction path but current flow through the first conduction path is blocked, and (iii) a state, wherein current is capable of flowing between A and B through the first conduction path but current flow through the second conduction path is blocked.

An energy storage system according to an embodiment of the present disclosure includes: a battery configured to at least store a received electrical energy in a form of direct current, or output the stored electrical energy; a power conditioning system configured to convert an electrical characteristic to charge or discharge the battery; and a battery management system configured to monitor state information of the battery, wherein based on a plurality of preset inputs being input to the battery management system, power is supplied to the power conditioning system, and based on a single preset input being input to the battery management system, power supply to the power conditioning system is blocked.

An energy storage system has at least one string of N modules, with each module including an energy storage device and a switching unit configured to for either serially connect the energy storage device into the string or to provide a short circuit. The energy storage system additionally includes a controller configured to perform (during on-load operation of the ESS) the steps of: changing the state of at least one switching unit of a module; measuring a current and a voltage at the energy storage device of the module, and determining characteristics of the energy storage device on a basis of at least a current through the string and change over time of the voltage measured before and after change of the state of the switching unit.

An open cell detection system includes a battery management system. The battery management system includes a control unit that transmits an open cell detection signal, to enable a balance unit for a first time period and to disable it for a second time period, and to enable an under-voltage comparison unit and an over-voltage comparison unit for a third time period. The under-voltage comparison unit compares a voltage with a first open cell threshold and outputs a first comparison result in the third time period. The over-voltage comparison unit compares a voltage with a second open cell threshold and outputs a second comparison result in the third time period. A judging unit determines whether a connection between a first battery unit and the battery management system is inoperative based on the first and second comparison results.

A battery management system comprising: at least one battery comprising two or more sets of cells, each set of cells comprising one or more cells; a multiplexing switch apparatus connected to each set of cells; and at least one controller configured to use the multiplexing switch apparatus to selectively discharge the sets of cells based on at least one criterion. A battery pack comprising: at least one battery comprising two or more sets of cells, each set of cells comprising one or more cells; and an integrated switching control system comprising at least one switch connected to each set of cells, wherein the integrated switching control system is configured to control the at least one switch to discharge the sets of cells sequentially or selectively based on at least one criterion. A battery management method or a battery pack control method.

Temperature controlled Battery Pack; a Method of protecting a large battery pack from thermal stresses; all weather Battery module; an apparatus and method for charging a battery pack, and decoupling the charging voltage from the battery pack voltage; an apparatus and method for discharging the hybrid battery modules, and extending the range of the battery pack; Battery pack controller—safety and reliability of battery pack. A method of providing flood protection to a large battery pack. A method of cooling the battery pack in extreme hot temperatures. A method of heating the battery pack in extreme cold temperatures. A method of repurposing the battery module (BM) Charging and balancing circuit is one of the key components of the battery pack. The invention constitutes an apparatus of Energy discharging split circuit installed within each BM, and an energy management algorithm installed in the battery pack controller. The energy discharging circuit mixes the current output of batteries and capacitors within each BM, as per the instructions from the battery pack controller algorithm. The algorithm takes the SoH and SoC of the batteries in the weakest BMs into account to calculate the mix of current from batteries and capacitors, and selectively instructs each BM. A method for discharging the battery BMs, and extending the range of the battery pack. Battery pack controller is the Master controller of the battery pack.