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6424results about "Charge equalisation circuit" patented technology
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Battery pack for cordless power tools
InactiveUS7728553B2Avoid damageCircuit monitoring/indicationCharge equalisation circuitEngineeringPower tool
A battery pack which includes a battery pack electronic control circuit adapted to control an attached power tool and / or an attached charger. The battery pack includes additional protection circuits, methodologies and devices to protect against fault conditions within the pack, as the pack is operatively attached to and providing power to the power tool, and / or as the pack is operatively attached to and being charged by the charger.
Owner:BLACK & DECKER INC
State of charge indicator for battery
InactiveUS20060097699A1Circuit monitoring/indicationCharge equalisation circuitBattery state of chargeBipolar voltage
A state of charge indicator includes a current sensing circuit for sensing and converting charge or discharge current of a battery into a bipolar voltage. A counter circuit counts battery charge. A charge / discharge circuit is operatively connected to the current sensing and counter circuits and detects the voltage polarity from the current sensing circuit and sets the counter circuit to a count mode with an up or down count for a respective charge or discharge. A reset circuit is operative with the current sensing circuit, counter circuit and charge / discharge circuit for resetting the counter circuit to an actual state-of-charge of the battery after delay when the battery is idle representative of a battery open circuit voltage.
Owner:MATHEWS ASSOCS
System and method for tracking and archiving battery performance data
ActiveUS9197079B2Provide reliablyEnhanced and improved operatingCircuit authenticationCircuit monitoring/indicationRechargeable cellEngineering
An intelligent rechargeable battery pack having a battery management system for monitoring and controlling the charging and discharging of the battery pack is described. The battery management system includes a memory for storing data related to the operation of the battery, and the battery management system is also configured to communicate the data related to the operation of the battery to other processors for analysis.
Owner:ZOLL CIRCULATION
Battery management system for control of lithium power cells
ActiveUS9099877B2Provide reliablyEnhanced and improved operatingCharge equalisation circuitCircuit monitoring/indicationRechargeable cellEngineering
An intelligent rechargeable battery pack having a battery management system for monitoring and controlling the charging and discharging of the battery pack is described. The battery management system includes primary and secondary protection circuits for monitoring the charging and discharging of the battery. Individual battery cells forming the battery pack are connected by a main bus to a connector for connection to a battery charger or a device to be powered, and the main bus may be interrupted by a switch controlled by the battery management system to prevent damage to the battery during charging or discharging of the battery.
Owner:ZOLL CIRCULATION
Protection methods, protection circuits and protective devices for secondary batteries, a power tool, charger and battery pack adapted to provide protection against fault conditions in the battery pack
InactiveUS20050077878A1Primary cell to battery groupingCharge equalisation circuitElectrical batteryEngineering
In a cordless power tool system, protection methods, circuits and devices are provided to protect against fault conditions within a battery pack that is operatively attached to a power tool or charger, so as to prevent internal or external damage to the battery pack or attached tool or charger. The exemplary methods, circuits and devices address fault conditions such as over-charge, over-discharge, over-current, over-temperature, etc.
Owner:BLACK & DECKER INC
Battery management system
ActiveUS20090146610A1Easy maintenanceEasy to replaceCharge equalisation circuitSecondary cells charging/dischargingCritical levelTransfer switch
Apparatus for a modular battery management system with interchangeable slave modules connected to each cell and including a master module controlling and managing the battery system. All the modules receive power through a transfer switch that selectively switches between an external source, an auxiliary source, and the battery. The modules are configured to connect to a cell of the battery for charging and monitoring the cell individually. Each module is electrically isolated from the other modules. The modules are autonomous and shut down the battery and disconnect the module when a critical parameter of the cell is reached. When the battery is in service and a cell parameter approaches the critical level, the master controller instructs the corresponding slave module to charge the cell using battery power. The master module initializes the slave modules to uniquely identify the modules.
Owner:TRIGIANI ANTONIO
Method and system for battery protection
ActiveUS20060091858A1Solution to short lifeSevere impactCharge equalisation circuitCell electrodesElectric powerBattery pack
A method of conducting an operation including a battery. The battery includes a cell having a voltage. Power is transferable between the cell and the electrical device. A controller is operable to control a function of the battery pack. The controller is also operable with a voltage at least one of equal to and greater than an operating voltage threshold. The cell is operable to selectively supply voltage to the controller. The method includes the act of enabling the controller to operate when the voltage supplied by the cell is below the operating voltage threshold.
Owner:MILWAUKEE ELECTRIC TOOL CORP
Inductively powered battery charger
InactiveUS6100663AExtended service lifeImprove reliabilityCharge equalisation circuitElectromagnetic wave systemElectrical conductorEngineering
PCT No. PCT / NZ97 / 00053 Sec. 371 Date Nov. 3, 1998 Sec. 102(e) Date Nov. 3, 1998 PCT Filed May 2, 1997 PCT Pub. No. WO97 / 42695 PCT Pub. Date Nov. 13, 1997Loosely coupled inductive power for charging batteries is rectified from a first power pickup winding and the resulting current source is connected to a battery unit. Each current source is controlled by shorting a second resonant winding. Battery banks may be charged using multiple isolated position-tolerant pickups independently controlled according to the condition of the connected battery unit and by overall commands communicated over an isolated link. The battery unit may be a single cell. In a self-stabilizing bank or monoblock a primary inductive conductor is energized using all the cells, individual cells are separately monitored by control means and any below-average cell can be individually charged from the inductive conductor, thus correcting between-cell variations. The charge in all cells within a bank can be held within 30% to 70% of full charge and prevented from drifting towards full or empty during repetitive charge and discharge times.
Owner:AUCKLAND UNISERVICES LTD
Systems and Methods to Provide Enhanced Diode Bypass Paths
Systems and methods are herein disclosed for efficiently allowing current to bypass a group of solar cells having one or more malfunctioning or shaded solar cells without overwhelming a bypass diode. This can be done using a switch (e.g., a MOSFET) connected in parallel with the bypass diode. By turning the switch on and off, a majority of the bypass current can be routed through the switch, which is configured to handle larger currents than the bypass diode is designed for, leaving only a minority of the current to pass through the bypass diode.
Owner:NEWLIGHT CAPITAL LLC
Method and system for battery protection
ActiveUS20050007068A1Solution to short lifeIrreversible damageCharge equalisation circuitEmergency protective circuit arrangementsElectrical devicesEngineering
A system and method for battery protection. In some aspects, a method of conducting an operation including a battery pack, includes the acts of monitoring a first battery pack condition at a first monitoring rate, determining when a second battery pack condition reaches a threshold, after the second battery pack condition reaches the threshold, monitoring the first battery pack condition at a second monitoring rate, the second monitoring rate being different than the first monitoring rate. In some aspects, a method of conducting an operation including a battery, the battery including a cell having a voltage, power being transferable between the cell and the electrical device, a controller operable to control a function of the battery pack, the controller being operable with a voltage at least one of equal to and greater than an operating voltage threshold, the cell being operable to selectively supply voltage to the controller, includes the act of enabling the controller to operate when the voltage supplied by the cell is below the operating voltage threshold.
Owner:MILWAUKEE ELECTRIC TOOL CORP
Battery management unit, system and method
InactiveUS20040164706A1Charge equalisation circuitSecondary cells charging/dischargingManagement unitState of charge
Owner:TRANSPORTATION TECH
Battery management system and method
InactiveUS6983212B2Stable temperatureExtend battery lifeCircuit monitoring/indicationCharge equalisation circuitElectrical batteryVoltmeter
A battery management system is disclosed for control of individual cells in a battery string. The battery management system includes a charger, a voltmeter, a selection circuit and a microprocessor. Under control of the microprocessor, the selection circuit connects each cell of the battery string to the charger and voltmeter. Information relating to battery performance is recorded and analyzed. The analysis depends upon the conditions under which the battery is operating. By monitoring the battery performance under different conditions, problems with individual cells can be determined and corrected.
Owner:SCHNEIDER ELECTRIC IT CORP
Solar powered, grid independent EV charging system
InactiveUS20100181957A1Facilitating full environmental benefitNeed can be addressedHybrid vehiclesCharge equalisation circuitLow demandCharge rate
A system for charging a multiplicity of commuter EVs without dependence on the power grid is provided, using the EV batteries themselves as distributed off grid storage for all EVs connected to the system. The EV charging system comprises low cost solar modules and an intelligent charge management system capable of a providing flexible charge rate to EVs based on user demand, that is decoupled from the grid and thus does not add to peak power demands. Only a low capacity grid connection is provided for backup, and buffer solar panels may be provided for load balancing. Excessive solar energy is fed into the grid during times of low demand at the charging stations, such as on weekends.
Owner:SURYA POWER
Series-connected rechargeable cells, series-connected rechargeable cell device, voltage-balance correcting circuit for series-connected cells
ActiveUS20090278496A1Inhibit deteriorationAvoid breakingCharge equalisation circuitElectric powerTransformerRechargeable cell
[Object] There is provided series-connected rechargeable cells in which a large number of cells are series-connected and that makes it possible to improve performance on operations such as assembly or exchange and to perform speedy and smooth voltage-balance correcting for all cells.[Means for Solution] Series-connected rechargeable cells includes: a large number of rechargeable cells that are series-connected, and that are divided into a plurality of series-connected cell groups placed continuously in order of connecting; and a voltage-balance correcting circuit that balances the voltages of the cells, and that is provided with an inter-cell voltage-balance correcting circuit that performs voltage-balance correcting between adjacent cells in each of the cell groups and an inter-group voltage-balance correcting circuit that performs balance correcting of series-connection voltages of the cell groups by AC-coupling formed with a transformer coil and a switching circuit.
Owner:FDK CORP
Universal battery module and controller therefor
InactiveUS20070080662A1Easy to integrateMass productionCircuit monitoring/indicationCharge equalisation circuitEmbedded systemBattery pack
A battery pack is provided including universal battery modules and a master control module. By selecting proper rated universal battery modules and connecting them either in series and / or parallel, a high performance and long life battery pack is assembled that is suitable for high power applications such as electrical vehicles whereby the master control module acts as the battery pack control and interface module.
Owner:DELAWARE POWER SYST CORP
Battery controller and method for controlling a battery
ActiveUS7282814B2Process economyMore energyDc network circuit arrangementsCharge equalisation circuitElectricityEngineering
A battery controller for charging and discharging a plurality of batteries is disclosed. The battery controller has a plurality of direct current to direct current (DC to DC) converters connected to each other in series. Each battery of a plurality of batteries is electrically connectable to a respective DC to DC converter. A co-ordinator connected to each of the plurality of DC to DC converters controls charging and discharging of the battery electrically connected to the respective converter. The co-ordinator can also control charging and discharging of any one of the batteries to ensure that the battery retains sufficient electrical capacity, and, to increase the longevity of the respective batteries. Because each battery is electrically connected to a respective DC to DC converter, the energy from one battery can be used to charge another battery in order to monitor battery characteristics including energy capacity of each battery. Each of the DC to DC converters is selected to operate preferably below 30 volts while the total voltage of the entire battery system can be much more than 30 volts depending on the number of DC to DC converters placed in series.
Owner:ELECTROVAYA
Energy transfer device for series connected energy source and storage devices
InactiveUS20050077879A1Extended service lifeImprove energy storage performanceCharge equalisation circuitElectric powerTransformerEnergy device
A low cost, efficient, and rapid means for transferring energy or balancing charge among multiple, series connected batteries, capacitors, photovoltaic cells, fuel cells, and other types of energy source or storage devices is provided. Modules that transfer energy by moving charge from one or more series connected energy devices directly to one or more other energy devices in the string are disclosed. The modules utilize steering circuits comprised of switches and rectifiers, and energy storage elements such as inductors and transformers, to transfer energy between multiple energy devices in the string. The modules may be used in combination with string charging devices and loads. The modules provide a means to balance charge or potential of the energy devices, which is known to provide benefits of increased life and capacity.
Owner:NEAR TIMOTHY PAUL
Li-ion battery array for vehicle and other large capacity applications
InactiveUS20100121511A1Improve reliabilityMinimize timeCharge equalisation circuitDigital data processing detailsElectrical batteryComputer module
A large battery array, particularly for use in an electric vehicle, is formed of multiple modules, each containing plural battery cells and module management electronics. Each battery module has a nominal output voltage in the range of about 5 volts to about 17 volts. A controller communicates with individual battery modules in the array and controls switching to connect the modules in drive and charging configurations. The module management electronics monitor conditions of each battery module, including the cells it contains, and communicates these conditions to the controller. The module management electronics may place the modules in protective modes based upon the performance of each module in comparison to known or configurable specifications. The modules may be pluggable devices so that each module may be replaced if the module is in a permanent shutdown protective mode or if a non-optimal serviceable fault is detected.
Owner:BOSTON POWER INC
Battery controller and method for controlling a battery
ActiveUS20050194937A1Process economyMore energy efficientDc network circuit arrangementsCharge equalisation circuitElectricityBattery system
A battery controller for charging and discharging a plurality of batteries is disclosed. The battery controller has a plurality of direct current to direct current (DC to DC) converters connected to each other in series. Each battery of a plurality of batteries is electrically connectable to a respective DC to DC converter. A co-ordinator connected to each of the plurality of DC to DC converters controls charging and discharging of the battery electrically connected to the respective converter. The co-ordinator can also control charging and discharging of any one of the batteries to ensure that the battery retains sufficient electrical capacity, and, to increase the longevity of the respective batteries. Because each battery is electrically connected to a respective DC to DC converter, the energy from one battery can be used to charge another battery in order to monitor battery characteristics including energy capacity of each battery. Each of the DC to DC converters is selected to operate preferably below 30 volts while the total voltage of the entire battery system can be much more than 30 volts depending on the number of DC to DC converters placed in series.
Owner:ELECTROVAYA
Charging apparatus for capacitor storage type power source and discharging apparatus for capacitor storage type power source
InactiveUS20070194759A1MinimizeImprove efficiencyCharge equalisation circuitElectric powerCharge currentVoltage reference
A charging apparatus for electrically charging a capacitor storage type power source comprises a switching circuit for turning on / off the charge current, a current detection circuit for detecting the charge current, a voltage detection circuit for detecting the voltage of power source, a constant current control circuit for outputting an error amplifying signal according to the current value, a power control circuit for outputting an error amplifying signal according to the current value, the voltage value-and a power reference value, a constant voltage control circuit for outputting an error amplifying signal according to the voltage value and a voltage reference value, an OR circuit for selecting one of the error amplifying signals and a control circuit for generating a pulse width modulation signal according to the error amplifying signal output from the OR circuit to turn on / off the switching circuit and control the charge current.
Owner:POWER SYST KK
Autonomous battery cell balancing system with integrated voltage monitoring
InactiveUS6873134B2Circuit monitoring/indicationCharge equalisation circuitLithium-ion batteryControl circuit
Owner:THE BOEING CO
Battery management system and driving method thereof
ActiveUS20080211459A1Hybrid vehiclesCharge equalisation circuitElectrical batteryBattery management systems
A battery management system is provided for managing a battery that supplies power to a vehicle. The battery includes a plurality of cells. The battery management system includes a sensing unit for measuring a voltage of each of the plurality of cells. The battery management system detects at least one first cell among the plurality of cells that needs to be balanced according to the measured voltage of each of the plurality of cells. In addition, the battery management system performs a cell balancing operation on said at least one first cell by using different methods according to a driving state of the vehicle.
Owner:SAMSUNG SDI CO LTD
Battery pack for cordless power tools
InactiveUS20080238370A1Avoid damageCharge equalisation circuitCircuit monitoring/indicationEngineeringPower tool
A battery pack which includes a battery pack electronic control circuit adapted to control an attached power tool and / or an attached charger. The battery pack includes additional protection circuits, methodologies and devices to protect against fault conditions within the pack, as the pack is operatively attached to and providing power to the power tool, and / or as the pack is operatively attached to and being charged by the charger.
Owner:BLACK & DECKER INC
Autonomous battery cell balancing system with integrated voltage monitoring
InactiveUS20050017682A1Circuit monitoring/indicationCharge equalisation circuitLithium-ion batteryControl circuit
An autonomous lithium-ion cell balancing system with integrated voltage monitoring includes a lithium-ion battery having a plurality of cells, a cell balancing circuit and a cell balancing control circuit. The heart of the cell balancing circuit is a plurality of gated cell balancing converters that are connected with the battery cells and a common share bus. Each gated lithium-ion cell balancing converter receives and input drive voltage and an input sample voltage and transfers energy from highly charged lithium-ion cells to the less charged lithium-ion cells, forcing all cells to have the same energy level. Further, the gated cell balancing converter provides a telemetry output voltage analog to an input cell voltage, eliminating the need for a separate cell voltage monitor.
Owner:THE BOEING CO
Charge balancing systems and methods
InactiveUS6841971B1Easy to scaleCharge equalisation circuitSecondary cells charging/dischargingCapacitanceCapacitive storage
A system for equalizing the voltages across first and second batteries coupled in series at a common terminal comprising a capacitive storage element, first and second inductive storage elements, first and second switch circuits, and a control unit. The capacitive storage element is coupled to first and second nodes. The first inductive storage element is coupled between the first node and the first battery. The second inductive storage element is coupled between the second node and the second battery. The first switch circuit is coupled between the first node and the common terminal. The second switch circuit is coupled between the second node and the common terminal. The control circuit operates the first and second switch circuits to control current flow to the first and second batteries.
Owner:ALPHA TECHNOLOGIES SERVICES INC
Battery-Cell Converter Management Systems
InactiveUS20100213897A1Increase manufacturing costSerious degradationCharge equalisation circuitDc-dc conversionManagement unitState of charge
A battery cell converter (BCC) unit including one or more energy-storing battery cells coupled to one or more DC / DC converters is disclosed. A management unit can monitor and control the charging and discharging of each battery cells; including monitoring of voltages & State-of-Charge of each cell as well as controlling the switching of the DC / DC converters. The combined power and cell switching algorithms optimizes the charging and discharging process of the battery cells. A compound battery cell converter system comprising a series stack of BCCs to achieve high effective converter output voltage is also disclosed. The new proposed Battery Cell Converter architecture will enable improvements in battery pack usage efficiencies, will increase battery pack useable time per charge, will extend battery pack life-time and will lower battery pack manufacturing cost.
Owner:TSE LAWRENCE TZE LEUNG
Equalizer for series of connected battery strings
InactiveUS20050140335A1Quick effectLower the volumeCharge equalisation circuitElectric powerCharge currentTransformer
A terminal voltage equalization circuit is used to equalize the terminal voltage of the series of connected battery strings so that each battery in the series of connected battery strings can be equally charged. When voltage of a certain battery in the battery string is higher than that of the other batteries, the battery voltage sensing and controlling circuit will output a high frequency signal to drive the switch devices to transit power from the high voltage batteries to the low voltage batteries by transformer. By the high switching switches, the charging currents through the batteries with high terminal voltages can be reduced, the charging currents through the batteries with low terminal voltages can be enhanced, and therefore the damages to the batteries due to overcharging can be avoided and speedy balance of the terminal voltages between each battery can be achieved.
Owner:IND TECH RES INST
Battery optimization system and method of use
InactiveUS7489106B1Battery capacity can be maximizedMinimizing electrical componentCharge equalisation circuitElectric devicesSystem optimizationBattery capacity
The present invention relates to a microprocessor controlled battery management system that optimizes the total electrical capacity of that battery. It uses localized cell power sources that correct the capacity of the individual connected cells to achieve the maximum capacity of the battery as it acts in a synergistic series connection of cells. The microprocessor retrieves data of battery load current, cell voltage, cell temperature, and battery charger current in timed increments. Through the application of the microprocessor's algorithms, after an initial cell profiling of individual cell capacities has been performed, individual cell DC / DC converters are enabled to correct the condition of the individual cells. In this manner the battery capacity is not affected by the capacity of the weakest cell.
Owner:TIKHONOV VICTOR
Health Management of Rechargeable Batteries
ActiveUS20100121587A1Improved characterizationEasy to controlCharge equalisation circuitCharging managementManagement unitState of health
Systems and methods for health management of rechargeable batteries are disclosed. In one embodiment, a rechargeable battery system includes a rechargeable battery, and a battery health management unit operatively coupled to the rechargeable battery and including a state of health module configured to estimate a battery health by receiving battery-related data and predicting one or more failure modes. The state of health module may further include a prognostic failure mode component configured to combine at least one flight data variable with at least one model-based prognostic. In alternate embodiments, the battery health management unit may further include a state of life module and a state of charge module.
Owner:THE BOEING CO
Device for managing battery packs by selectively monitoring and assessing the operative capacity of the battery modules in the pack
InactiveUS6239579B1Rejuvenate and boost healthCycle wellCharge equalisation circuitCircuit monitoring/indicationElectricityElectrical battery
The invention relates to a device for managing battery packs by measuring and monitoring the operating capacity of individual battery modules in a battery pack. A programmable logic controller directs the selective closing of relays to allow individual battery modules to be load-tested using a variable discharge load unit, without compromising useful battery pack capacity. A battery module whose useful capacity falls below a predefined threshold may be connected to a battery charger for replenishment and then electrically realigned with the remaining modules in the pack for continued operation. Alternatively, an alarm may be triggered which alerts the user that the module is due for replacement. This sequence of events is performed on all cells in the pack at a predetermined interval.
Owner:ESTCO ENERGY +1
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