74results about "Charge equalisation circuit" patented technology

An apparatus is dedicated to controlling the voltage of a battery comprising at least two modules connected in series and each comprising at least one electrochemical cell, and each coupled to voltage balancing means. The apparatus comprises measurement means for determining first voltages across the terminals of each of the modules, calculation means for measuring a second voltage across the terminals of the battery and for determining a mean voltage per module representative of the second voltage divided by the number of modules, and processor means for comparing each measured first voltage with the mean voltage per module and for delivering to the balancing means signals representative of the result of the comparison whenever the first voltage of a module is greater than the mean voltage, such that the balancing means reduce the voltage across the terminals of the module.

A converter system, e.g., for vehicle-to-vehicle charging, includes galvanically-isolated modular first and second converters having the same maximum voltage rating, a direct current (DC) voltage bus interconnecting the converters, and an electronic controller. An input voltage to the DC bus is converted into an output voltage via switching control signals to the modular converters. The system's voltage rating may equal the maximum of the input and / or output voltage, or it may equal the maximum input voltage and be about 50-percent of the maximum output voltage. The maximum input and output voltages may be equal. When the voltage rating is about 50-percent of the maximum input voltage, capacitors may be connected in parallel with the modular converters on an input side thereof. Switching circuits may be connected to the bus to control the conversion of the input voltage via switching control signals.

The present disclosure discloses a balancing control method, apparatus, and system for a battery cluster, and belongs to the field of energy storage systems. The balancing control method for the battery cluster includes: obtaining at least one of a first actual state of charge and an actual state of health of each battery cell, and a second actual state of charge of each PACK; controlling, by a first balancing module based on the at least one of the first actual state of charge and the actual state of health, at least one of state of charge balancing and state of health balancing of each battery cell; and controlling, by a second balancing module based on the second actual state of charge, state of charge balancing of the PACK.

Embodiments that provide advanced charging of energy source arrangements for energy storage applications are disclosed. The embodiments can be used within energy storage systems having a cascaded arrangement of converter modules. The embodiments can include the application of pulses to an energy source of each module of the system. The pulses can be applied for a duration sufficient to initiate an electrochemical reaction. Feedback based pulse control embodiments are also disclosed.

A battery cell system includes multiple battery cells and a control circuit. The battery cells include an internal cell resistance. The control circuit is configured to detect when a charge level of a first battery cell of the battery system is greater than a charge level of a second battery cell of the battery system; and activate an internal cell resistance of the first battery cell to reduce the charge level of the first battery cell and deactivate the internal cell resistance when the charge level of the first battery cell is within a specified threshold charge level of the second battery cell.

Electrochemical cell and battery management systems comprise at least one battery comprising two or more strings of cells, each string of cells comprising two or more cells. The system includes a multiplexing switch apparatus connected to each string of cells and a controller. the controller is used to control various aspects of the charge and / or discharge of the electrochemical cell and / or battery.

A circuit enabling precharge, active discharge and battery balancing operations in a single subcircuit is described. According to one or more embodiments, a circuit is provided comprising a first battery comprising a positive terminal coupled to a positive transmission line and a negative terminal coupled to a common node, wherein the positive transmission line comprises a first contactor, a second battery comprising a positive terminal coupled to the common node and a negative terminal coupled to a negative transmission line, wherein the negative transmission line comprises a second contactor, and a subcircuit coupled to the common node, to the positive transmission line, and to the negative transmission line.

The present disclosure relates to computer-implemented method of operating a battery for providing frequency response to a power grid, the battery comprising a plurality of containers each configured to store electrical energy, the method comprising, for a given container: determining a container target response by dividing a system target response by the plurality of containers; determining a container capacity by dividing a battery capacity by the plurality of containers; determining a state-of-charge offset between an average state of charge across the plurality of containers and a state of charge of the given container; determining a response adjustment by multiplying the container capacity by the state-of-charge offset; and determining a response for the given container by adjusting the container target response by the response adjustment.

A battery system including: a first electrical energy store being configured to provide a first electrical energy output at a first voltage and being connected to a voltage conversion unit; a second electrical energy store being configured to provide a second electrical energy output at a second voltage and being connected to an output of the battery system; and the voltage conversion unit connecting the first electrical energy store and the second electrical energy store and being configured to: perform a first voltage conversion functionality, in which the voltage conversion unit is configured to convert between the first voltage and the second voltage; and perform a second voltage conversion functionality, in which the voltage conversion unit is configured to convert between a third voltage and the first or second voltage; the first voltage conversion functionality and the second voltage conversion functionality sharing circuitry of the voltage conversion unit.

A power storage device includes: a battery cell; a power terminal; a memory that stores information on the battery cell; and a signal terminal at which voltage and temperature signals of the battery cell and input-output data of the memory are transmitted and received. A charger includes: a signal terminal; a power output terminal to output power to the power storage device; an AC power input terminal; a DC power input terminal; a power converter that converts input power into output power; a current converter, a voltage converter, and a temperature converter that convert a current signal, a voltage signal, and a temperature signal of the battery cell into current data, voltage data, and temperature data, respectively; and an ECU that processes the data.

The invention discloses method and apparatus for quantitative analysis of battery performance and an electronic device. The method includes performing a full charging / discharging process on a to-be-analyzed battery cluster, and determining differential capacities versus voltage of a plurality of cells in the battery cluster at different times; determining first times and first states of charge (SOC) when the differential capacities versus voltage of the cells reach a first peak and second times and second SOCs when the differential capacities versus voltage of the cells reach a second peak, and determining capacity parameters of the cells; and performing quantitative analysis on the battery cluster according to the capacity parameters of the plurality of cells. Accordingly, the battery cluster does not need to be disassembled. The capacity parameters can be quickly and accurately determined through a full charging / discharging process. The method requires can realize relatively accurate quantitative analysis for the battery cluster.

A cell balancing current control device and method for a battery pack are capable of reflecting a resistance value depending on a length of a flat cable which connects each cell of a multi-series battery and a battery management system (BMS) (that is, cell to BMS connection) to control an on / off duty ratio of a switching module for applying a cell balancing current to be different for each individual cell, and a battery pack. Cell balancing current control is based on an on / off duty of a switching module calculated by reflecting the resistance value depending on the length of the flat cable.

A charging system for electric vehicles includes a number N of charge ports, each charge port having an interface for power exchange with an electric vehicle, a number M of modular energy storage direct converter systems (MESDCS), a switchable connection matrix, and a control system. The control system is configured to control an output voltage of each MESDCS. The switchable connection matrix is configured to connect one or more selected MESDCS with each given charge port and is further configured to connect one or more selected MESDCS with a power source.

Improved systems and methods for balancing a state of charge (SOC) of a plurality of batteries are disclosed. For example, a system may include multiple battery strings connected in parallel to one another through a common bus. Each battery string may include a power converter and multiple battery modules connected in series. The power converter may be configured to regulate the combined power output of the battery modules. Each battery module may include multiple relays that may be controlled to discharge, charge, and / or bypass that battery module. Collectively, the power converters of the battery strings and the relays of the battery modules may be controlled to balance the battery strings with one another and to balance the battery modules within each of the battery strings.

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.

In management device, voltage measurement circuit measures a voltage of each of a plurality of cells connected in series. A plurality of voltage measurement lines connect between respective nodes of the plurality of cells and respective voltage measurement terminals of voltage measurement circuit. A lower reference potential line connects between a lower node of lowermost cell of the plurality of cells and a lower reference terminal of voltage measurement circuit. Voltage dividing resistor is connected between a predetermined fixed potential and lowermost voltage measurement line. Controlling circuit monitors the voltage between a voltage dividing point potential of voltage dividing resistor and a lower reference potential of voltage measurement circuit, and diagnoses presence or absence of disconnection of lowermost voltage measurement line or the lower reference potential line.

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.

A power storage device includes a plurality of batteries connected in series, a cell balancing circuit configured to individually discharge the plurality of the batteries, and a controller configured to execute a cell balancing process in which operation of the cell balancing circuit is controlled so that at least one of cell balancing target batteries is discharged by a predetermined state of charge, the at least one of the cell balancing target batteries including the battery that is fully charged.

A power supply system is applied to the electronic device, where the electronic device includes at least two cell groups, an external interface, and a load; the power supply system includes a toggle switch circuit and a buck switch circuit; two poles of the cell group are respectively coupled to an input end of the toggle switch circuit; a first output end of the toggle switch circuit is coupled to an input end of the buck switch circuit, a second output end of the toggle switch circuit is coupled to an output end of the buck switch circuit, and the input end of the buck switch circuit is coupled to an external interface; and the output end of the buck switch circuit is further coupled to the load, and the external interface is configured to connect a charger.

An energy storage system (EMS) for mobile and stationary applications includes multiple battery circuits connected in parallel via bidirectional DC-DC converters and managed by centralized or distributed control. Each circuit comprises one or more electrochemical storage elements, and the EMS regulates current flow based on system data indicative of state-of-charge (SOC), state-of-health (SOH), temperature, and chemistry. The EMS performs active balancing by adjusting current commands to equalize SOC across circuits and isolates faulty or degraded modules when necessary. In vehicle applications, the EMS manages power flow between traction batteries, electric drive units, and low-voltage systems, supporting propulsion, regenerative braking, and accessory loads. In stationary systems, the EMS integrates with generators, renewable sources, or grid-tied inverters to coordinate energy delivery, provide backup power, and optimize battery usage. The architecture supports heterogeneous battery types, modular scalability, and fault-tolerant operation, enabling safe and efficient control of energy storage resources in a range of electrified transport and stationary power environments.

The invention provides a voltage balancing system for balancing controlling of voltage of battery cells including a first set of battery cells and a second set of battery cells connected in series. The system includes a high-side analog front end (AFE) connected to the first set of battery cells, a low-side analog front end (AFE) connected to the second set of battery cells, a microcontroller communicating with the high-side AFE and the low-side AFE, and a communication isolating module interconnecting between the high-side AFE and the microcontroller. The system further includes a balancing module arranged at a back end of the low-side AFE or the high-side AFE to equalize voltages output by the low-side AFE and the high-side AFE. Compared with the prior arts, the system employs a balancing module to balance the voltages of the two sets of battery cells, which can shorten the voltage difference therebetween.

Described herein are techniques and mechanisms for modules in a battery stack to provide backup power to their neighbor modules thereby permitting the neighboring cell to activate bypass switches, which can effectively remove a module's associated battery cells from the charge / discharge loop and permit the battery to continue safe operations. This mechanism can be a cost-effective technique of providing backup power.

Examples of the present disclosure include an energy-storage system having a plurality of energy units, each energy unit including a battery module and a power converter coupled to a respective battery module; and at least one controller configured to (a) receive one or more parameter values from each battery module, each parameter value indicating a respective battery module state, (b) determine a difference between a largest parameter value from a first battery module and a smallest parameter value from a second battery module, (c) determine whether the difference is greater than a threshold difference, and (d) control at least one power converter to transfer energy between the first battery module and the second battery module through a lowest number of power converters in response to determining that the difference is greater than the threshold difference.

A battery control apparatus according to the present disclosure includes a plurality of switching circuits connected in series to a plurality of battery packs; a plurality of sensing circuits to generate a sensing signal indicating a voltage and a current of each battery pack; and a control circuit to determine the voltage, a state of health (SOH) and a state of charge (SOC) of each battery pack. According to an embodiment of the present disclosure, in the selective parallel connection control for at least one of the plurality of batteries, it is possible to reduce a difference in SOH between the plurality of batteries.

A battery SOC balancing control method and a single-machine control method are disclosed. The method includes: collecting an SOC value of each single-machine in a parallel-machine system, and when the parallel-machine system meets a condition for starting SOC balancing, switching an operation mode of each single-machine according to a numerical comparison result between the SOC value of each single-machine and an average SOC value of the parallel-machine system; controlling an output of each single-machine according to a type of the operation mode of each single-machine, where the single-machine in a voltage source mode is controlled to output a rated voltage, and the single-machine in a current source mode is controlled to start a grid connection operation; when it is detected that there exists no single-machine operating in the current source mode in the parallel-machine system, switching an operation mode of the parallel-machine system to a voltage source droop parallel-machine mode.

Provided in the present application are a modulation method and modulation apparatus for a cascaded energy storage system, and a storage medium. The cascaded energy storage system comprises N sub-modules connected in a cascade mode, where N≥2. The modulation method comprises: according to N carriers, modulating waveform signals that are output by N sub-modules, wherein the N carriers correspond to the N sub-modules on a one-to-one basis; and during modulation, performing at least one instance of synchronization delay on the N carriers, so as to synchronously change initial phase angles of the N carriers, wherein during the synchronization delay, the amplitudes of the carriers remain unchanged.

There are provided an electric vehicle and a control method thereof, the electric vehicle including: a motor configured to cause the electric vehicle to travel; a plurality of battery packs configured to supply electric power to the motor; an electric power path electrically connecting the motor and the plurality of battery packs; a switching element configured to electrically switch disconnection and connection of the electric power path; and a controller configured to control the switching element. The controller performs a pack balance control that causes, when at least one of predetermined control start conditions is satisfied, the switching element to repeatedly open and close to perform an intermittent charging and discharging operation between the plurality of battery packs, and reduces a potential difference between the plurality of battery packs.

The present disclosure relates to a battery cell balancing device and method, and a battery management system, and the technical problem to be solved is to provide a mechanism capable of increasing a service lifespan of the battery pack by allowing a balancing function to be maximally used in a range in which a cell voltage measurement error may be compensated for even when an abnormality has occurred in an internal circuit of the battery management system (BMS). To this end, the present disclosure provides a configuration of determining whether an abnormality occurs in an RC circuit based on a cell voltage of a battery cell measured through the RC circuit of the BMS, and controlling a switching time of a balancing switch to compensate for a cell voltage measurement error caused by the abnormality in the RC circuit.

A battery management system (100) includes a set of N battery modules (175A-N) coupled together in series, a set of N battery monitors (170A-N), and a controller (110). Each battery monitor in the set of N battery monitors is coupled to a respective battery module in the set of N battery modules and measures a battery parameter of the respective battery module. The controller determines a preprogrammed delay for each battery monitor and provides the respective preprogrammed delay to each battery monitor. The controller transmits a synchronization command to the set of N battery monitors, which wait the respective preprogrammed delays in response to receiving the synchronization command before stopping updates to values of the respective battery parameters. The controller transmits a read command to the set of N battery monitors, which transmit read responses to the controller comprising values of the battery parameters.