268results 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 circuit arrangement (10) for controlling an output voltage of the circuit arrangement (10). The circuit arrangement (10) comprises battery cells (121) forming a plurality of series-connectable cell modules (120, 120′). The cell modules (120, 120′) comprise: a first group of cell modules (150) comprising a first number of cell modules (150), Each cell module (120, 120′) of the first group has a first nominal cell module voltage in a range of 30-200 V, and at least one second group of cell modules (150′) comprising a second number of cell modules (150′). Each cell module (120, 120′) of said at least one second group has a second nominal cell module voltage that is less than the first nominal cell module voltage. The circuit arrangement (10) comprises a control unit (20) configured to: measure the output voltage of the circuit arrangement (10), and in order to control the measured output voltage towards the voltage target, control at least one respective electronic module (100, 100′) to adjust a respective contributing number of cell modules (120, 120′) of at least one of the first and second groups. Each cell module (120, 120′) of the respective contributing number of cell modules (120, 120′) is contributing, positively or negatively, to the output voltage of the circuit arrangement (10).

In a battery monitoring device for monitoring a state of a rechargeable battery that includes an electrolyte and a plurality of electrodes, a response signal input unit is configured to receive a response signal of the rechargeable battery to a predefined AC signal, and a calculation unit is configured to calculate a complex impedance of the rechargeable battery based on the response signal. A power supply unit is configured to receive a power supply voltage from the rechargeable battery and supplies the power supply voltage to at least the calculation unit. A first electrical path connecting the rechargeable battery to the power supply unit and a second electrical path connecting the rechargeable battery to the signal control unit are provided independent of each other. The signal control unit is configured to cause the rechargeable battery to be monitored, as a power source, to output the predefined AC signal.

In an approach to a state of health for grid applications, a system includes one or more battery energy storage systems having a plurality of batteries; energy sources; power distribution systems; and computing devices. The computing devices are configured to: for each of the battery energy storage systems: receive battery parameters for each of the batteries from the battery energy storage systems; determine a lithium plating state, a solid electrolyte interface (SEI) thickness, and a dendrite length for each of the plurality of batteries; determine a battery state of health (SOH) for each of the batteries based on at least one of the lithium plating state, the SEI thickness, and the dendrite length; determine a battery charge profile to mitigate aging for each of batteries based on the SOH; and send updated battery parameters and control thresholds for each of batteries to each of the battery energy storage systems.

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.

Disclosed is a power electronic intelligent battery unit, including: a battery module, the battery module comprising a plurality of battery cells connected in series and sensors for measuring the voltage, current, pressure and / or temperature of the battery cells; and an intelligent battery interface, the intelligent battery interface being connected to an output side of the battery module and the sensors, and the intelligent battery interface having a power interface and an information interface for the outside, wherein the battery module monitors the voltage, current, pressure and / or temperature information of the battery cells, while providing or absorbing power by means of the intelligent battery interface.

An energy storage device includes a charge storage assembly, an auxiliary storage element, and a charge control circuit. The charge storage assembly includes an array of supercapacitors coupled in series, a plurality of batteries, and a charge retention circuit. Each of the plurality of batteries is electrically coupled to a corresponding supercapacitor in the array of supercapacitors. The charge retention circuit is configured to maintain a charge state of at least one supercapacitor in the array of supercapacitors when the at least one supercapacitor is in an idle state. A charge control circuit is configured to selectively transfer charge between the at least one supercapacitor in the array of supercapacitors and the auxiliary storage element.

A battery dynamic-equalization apparatus includes a power battery including a first battery pack and a second battery pack, a motor controller connected to the power battery, a motor connected to the motor controller, and a controller connected to the motor controller. The controller is configured to: control, in a first preset state, a bridge arm of the electric-motor controller to drive the electric motor, cause a first battery pack and a second battery pack to be alternately charged and discharged so as to realize self-heating of the first battery pack and the second battery pack, and to configure the absolute value of the difference value between the capacitance of the first battery pack and the capacitance of the second battery pack to be lower than a preset threshold value.

Provided are a battery management system and a battery pack including the same. The battery management system includes a plurality of slave managers provided to correspond to a plurality of battery modules, and configured to uniformly adjust cell voltages of a plurality of battery cells of respective battery modules, a master manager configured to detect a battery module having a contact defect therein among the battery modules as a defective module using a voltage deviation that is a difference between a maximum value and a minimum value of the cell voltages, and a data transmitter configured to electrically connect the master manager and the slave managers to enable data exchange.

A battery dynamic equalization apparatus includes a power battery; a motor controller; a direct-current charging and discharging port; and a controller. The controller is connected to the motor controller and configured to: in a first preset state, charge the power battery by the direct-current charging and discharging port, and control bridge arms of the motor controller to alternately charge and discharge a first battery pack and a second battery pack so as to achieve self-heating of the first battery pack and the second battery pack, and allow the absolute value of the difference between the battery level of the first battery pack and the battery level of the second battery pack to be lower than a preset threshold, realizing dynamic equalization of battery levels of the first battery pack and the second battery pack in the self-heating process, thereby improving the battery performance and extending the battery life.

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.

An apparatus for extending battery life includes a control objective map module configured to derive a mapping between a state of charge (“SOC”) of each battery unit of a plurality of battery units with respect to an average SOC of the battery units. A highest capacity battery unit has a highest discharge amount between a SOC maximum and a SOC minimum and a lowest capacity battery unit has a lowest discharge amount between the SOC maximum and the SOC minimum. Each battery unit is connected to a shared bus through a direct current (“DC”) to DC power converter. The control objective map provides a current reference for a battery unit of the plurality of battery units in relation to a common current of the shared bus. The current reference for the battery unit includes a reference current for the DC to DC power converter connected to the battery unit.

The present disclosure relates to a battery management system for energy control and, more specifically, to a battery management system for controlling energy by stably managing, using a new current management means, battery conditions that change due to internal or external factors during the charging and discharging process of a battery cell, so as to enable optimized charging and discharging of the battery cell.

The present disclosure relates to a reconfigurable battery system and method of operating the same. An example apparatus includes at least one memory, instructions in the apparatus, and processor circuitry to execute the instructions to determine a state of charge of a battery, determine a closed circuit voltage of the battery, determine a value of a parameter based on a ratio of the state of charge and the closed circuit voltage, and control a switch coupled to the battery based on the value of the parameter, the controlling of the switch to either cause the battery to be coupled to a battery string or cause the battery to be disconnected from the battery string.

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.

Systems and methods directed to solar power-assisted hybrid battery balancing are disclosed. For example, operating the solar power-assisted hybrid battery balancing system includes determining accessibility of solar power from a plurality of solar panels and in response to determining solar power is not accessible, activating one or more arrangements of a plurality of switches to enable a battery balancing process including redistribution of stored energy among a plurality of battery cells to maintain a balanced state-of-charge across the plurality of battery cells and transferring of charge between battery cells via a capacitor coupled to output terminals of a solar charge controller. The method includes, in response to determining solar power is accessible, activating one or more other arrangements of the plurality of switches to enable a solar battery balancing process including directing of solar-generated electrical energy among the plurality of battery cells to maintain the balanced state-of-charge.

A power supply system that utilizes a hybrid architecture to enable low cycle-life, high energy density chemistries to be used in rechargeable batteries to extend the range of a traction battery.

The present disclosure relates to a battery pack of an electric battery system, for balancing individual cells within the battery pack with respect to voltage, charge and / or state of charge. The electric battery system comprises at least one pack, each pack comprising a plurality of battery cells, and each battery cell is monitored via a cell monitoring device (CMD), which provides cell-level measurements. Cell balancing is provided in a manner which allows for the simultaneous measuring of a cell-level balancing current and a cell-level balancing voltage during the balancing. Such measuring allows for control of the cell balancing without having to continuously interrupt and restart the cell balancing procedure.

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.

To provide a battery control circuit with a novel structure, a battery protection circuit with a novel structure, and a power storage device including the battery circuit. The semiconductor device includes n cell-balance circuits (n is an integer greater than or equal to 1). One secondary battery is electrically connected to one cell-balance circuit. The cell-balance circuit includes a comparison circuit, and a memory element is electrically connected to an inverting input terminal of the comparison circuit. The memory element includes a first transistor and a capacitor. A potential is retained. The retained potential changes in accordance with a change in a potential of a negative electrode of the secondary battery. The comparison circuit has a function of comparing the retained potential with a potential of a positive electrode of the secondary battery. Output from the comparison circuit controls a gate voltage of a second transistor electrically connected to the secondary battery in parallel. The first transistor includes a metal oxide including indium in a channel formation region.

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.

A computer system determines a compensation current adapted to counteract at least parts of a charge equalization current expected to be generated by an activation of an additional battery pack in parallel connection with one or more currently activated battery packs. The compensation current is determined as a current range between a lower and upper compensation current limits. The lower limit is based on a voltage of the additional battery pack, and a voltage and impedance of the currently activated battery packs. The upper limit is based on a maximum discharge ability of a system powered by the currently activated battery packs, a maximum discharge ability of the currently activated battery packs, a voltage and impedance of the additional battery pack, and a voltage and impedance of the one or more currently activated battery packs.

An electric quantity balance control method includes: S1: obtaining remaining electric quantities of a plurality of energy storage devices; S2: calculating an average value of the remaining electric quantities of the plurality of energy storage devices; S3: subtracting the average value calculated in step S2 from the remaining electric quantity of each energy storage device to obtain a corresponding difference, and for each energy storage device, if the corresponding difference is greater than 0, increasing an output voltage of the energy storage device to increase its output power, otherwise if the corresponding difference is less than 0, reducing the output voltage of the energy storage device to decrease its output power. According to the energy storage device alternating current multi-phase system and the electric quantity balance control method therefor provided in the present invention, the problem of the overall endurance of the system being greatly shortened is effectively solved.

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 method of charging a battery pack is a method of charging a battery pack by charging, with one charger, a battery pack configured by connecting, in parallel, a plurality of storage batteries configured to store and release power, the method comprising: a detection step of detecting voltage and current values with respect to each of the storage batteries, which are connected in parallel; a determination step of determining whether or not a voltage detected for each of the storage batteries in the detecting step, is equal to or less than a first set voltage; and a charging step of charging the storage batteries, which are connected in parallel, wherein: in a first case, in which the voltages of all the storage batteries are determined to be equal to or less than the first set voltage in the determination step.

A trailer includes a first power equipment having an equipment battery pack, a charging device having a primary battery pack, and a docking station electrically connected to the primary battery pack. When the first power equipment is positioned in the docking station, the docking station supplies power from the primary battery pack to the equipment battery pack to recharge the equipment battery pack.

Techniques and apparatus for supplying power, including battery balancing and isolating. One example power supply circuit generally includes a first battery node for coupling to a first battery, a second battery node for coupling to a second battery, and a switch circuit coupled between the first battery node and the second battery node and disposed on a same integrated circuit (IC) die as the first battery node and the second battery node. The power supply circuit may be configured to balance the first battery and the second battery without a resistor (e.g., a resistor external to the IC die on which the power supply circuit resides).

A household load power supply method and a battery charge method are provided. A central controller can allocate a discharge power for each battery according to a required total discharge power, a state-of-charge data and state-of-heath data of n batteries, and the discharge power for each battery is proportional to the state-of-charge data and state-of-heath data of the each battery. A sum of discharge powers allocated to the n batteries is equal to the total discharge power. In this way, a battery with higher state-of-charge data and higher state-of-heath data can have higher discharge power, and the battery with higher state-of-heath data can have higher discharge power. Two dimensions, that is, the state-of-charge data and state-of-heath data are comprehensively considered, and thus the discharge powers allocated to the batteries are more reasonably and balanced, thereby extending an overall service life of a plurality of batteries in parallel.

Methods, apparatus, systems and articles of manufacture are described for a wireless battery system. An example apparatus includes at least one memory, instructions, and processor circuitry to at least one of instantiate or execute the instructions to identify a first battery node to transmit an uplink command during a first superframe interval, transmit a downlink command to the first battery node and a second battery node, the first battery node to switch in the first superframe interval from a receive state to a transmit state in response to the downlink command, the first battery node to transmit the uplink command in the transmit state, and receive the uplink command from the first battery node in the first superframe interval.