CN201868909U - Valve-regulated battery pack intelligent control system for backup power supply - Google Patents
Valve-regulated battery pack intelligent control system for backup power supply Download PDFInfo
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- CN201868909U CN201868909U CN2010206053828U CN201020605382U CN201868909U CN 201868909 U CN201868909 U CN 201868909U CN 2010206053828 U CN2010206053828 U CN 2010206053828U CN 201020605382 U CN201020605382 U CN 201020605382U CN 201868909 U CN201868909 U CN 201868909U
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Abstract
The utility model relates to a valve-regulated battery pack intelligent control system for a backup power supply, which belongs to the field of VRLA lead acid battery state monitoring technique. The valve-regulated battery pack intelligent control system comprises a plurality of voltage detection and equalization modules (2, 3, 4), a battery parameter detection module (1), and a main control module (5), wherein the plurality of voltage detection and equalization modules and the battery parameter detection module are arranged in matching, and are respectively connected with the main control module through communication isolation units (6, 7, 8, 9) and a data bus (10). The valve-regulated battery pack intelligent control system has the benefits that functions of active battery equalization, quick battery capacity detection and battery health degree detection are integrated, so as to substitute of the prior battery inspection device which can only detect the battery voltage, thereby prolonging service life of the battery, improving the safety and the reliability of a substation DC system, accurately predicting the battery capacity and the health degree, improving the operation and maintenance level, improving the automation degree of the substation, and reducing the loads of personnel. Accordingly, the valve-regulated battery pack intelligent control system has wide application prospect.
Description
Technical field:
The utility model relates to a kind of back-up source with valve control battery group intelligence control system, belongs to VRLA lead acid accumulator condition monitoring technical field.
Background technology:
At present, the VRLA lead acid accumulator obtains wide popularization and application, progressively replaces traditional storage battery in fields such as electric power, communication, railways.Compare with rich solution type lead-acid battery, VRLA has advantages such as volumetric specific energy is big, discharge performance good, maintenance workload is little.According to the actual operating position in scene, owing to many-sided reason, the VRLA battery leakage, distortion, short time inner capacities decay occur down to failure phenomenon in running, had a strong impact on the operational reliability of power-supply system.From battery assembling finish inject sulfuric acid after, battery just changes playing Chemical Physics all the time, with the difference of battery quality and service conditions, the situation of battery failure varies.Accurately the inefficacy of precognition battery is the problem that battery applications receives much attention in history always.The parameter the surveyed electric current of battery, voltage, temperature, internal resistance etc. all can be used to estimate or revise SOC, but because the relation between these battery parameters and the SOC is complicated and non-linear, the long-term accurately predicting of battery charge state (SOC) is very difficult.Usually the SOC Forecasting Methodology has discharge test method, internal resistance method, open circuit voltage method, ampere-hour method, intelligent neural net method and modelling etc.Many business-like battery condition monitoring instrument based on internal resistance measurement is widely used, but, the too high effect of estimating internal resistance measurement method of people, because VRLA battery exists the inefficacy mechanism of many complexity, and the internal resistance measurement result also can only provide some batteries to use early stage forecast information.Be higher than at 4 0% o'clock at battery remaining power, the internal resistance of battery (it has comprised ohmic internal resistance and part concentration polarization internal resistance) almost is identical; Just be lower than at 40% o'clock, its internal resistance just increases sharply.Be sealed lead accumulator in use (battery capacity is higher than 80%), its internal resistance changes very little; In case the internal resistance of cell has had marked change, then the life-span of battery has only also promptly come to an end.Between battery remaining power and internal resistance, do not find strict mathematical relationship; Present internal resistance method of testing has alternating current method and direct current method, but the accuracy of measuring in electric power system is relatively poor, and be the pith that equipment cost constitutes, make extensively to promote and become obstacle, at present, the problem that exists is to judge the quality of battery according to the internal resistance of measuring, and can't provide capacity information accurately.
Transformer station needs manually battery regularly to be checked capacity, and time-consuming, effort because human factor is arranged, may cause test data to have error, and for the system that has only single Battery pack, full discharge examination is a danger close to transformer station.
The utility model content:
The utility model purpose provides a kind of back-up source with valve control battery group intelligence control system, initiatively equilibrium of battery, battery capacity fast detecting, battery health degree are detected on one, substitute the battery logging that can only detect cell voltage, solve the problems referred to above that background technology exists.
The technical solution of the utility model is: back-up source is with valve control battery group intelligence control system, comprise several voltage detecting and balance module, a battery parameter detection module, a main control module, several voltage detecting and balance module, a battery parameter detection module coupling are provided with, and are connected with a main control module by communication isolation, data/address bus respectively.
It is to adopt the light idol to realize isolating that said communication is isolated.
Battery is under floating charge state, voltage detecting and balance module guarantee the unanimity of battery float voltage, guarantee that the Charging state of all batteries is in same level, and this is the basis of following capacity check, because do not have comparativity between each battery of unbalanced battery pack, may derive a wrong conclusion.When battery is detected, just close the direct current cabinet AC power, needn't throw off battery, make battery be in the regular picture state, short-term discharge through 15-20 minute, in this process, the parameters such as voltage, electric current, temperature of record battery can accurately be predicted the capacity and the health degree of battery according to the battery Mathematical Modeling of structure.
Regularly battery is carried out the shallow shallow effect that can play the storage battery activation of putting of filling, can avoid long-term floating charge to cause the pole plate passivation, battery capacity reduces.
Voltage detecting and balance module effect: the voltage that detects each monocell in real time; Initiatively balanced each monomer battery voltage makes monomer voltage reach balanced.
Battery parameter detection module effect: monitor the relevant parameter of battery cell in real time: battery pack Zong Dian Ya ﹑ battery charging and discharging electric current, ambient temperature, battery status, charge/discharge capacity.
Main control module effect: be a personal-machine interactive system,, obtain battery data analysis with voltage detecting and balance module, the communication of battery pack parameter detection module; According to total voltage and electric current the discharge of battery pack is surveyed automatically, and stored these discharge process data, the available capacity of counting cell and the health degree of battery show and local storage, in a suitable manner in order to the inquiry playback; Be furnished with touch-screen display module, can show in real time that to detect the data pedestrian's machine of going forward side by side mutual, parameter is provided with etc.; Different according to configuration, can store 3-12 individual month alert data and battery pack data; The communication interface of outfit and host computer is uploaded data in real time by the IEC61850 agreement of electric power system.
Preferred implementation: each voltage detecting and balance module detect, balanced eight adjacent series-connected cells, and the instruction according to main control module is sent will be dealt into main control module on the battery data that detect.Main control module by with the serial communication of voltage detecting and balance module, obtain the voltage of all batteries, and the mean value of calculating voltage, maximum, minimum value.Give each subelement issue average voltage information according to above-mentioned value, voltage detecting and balance module determine whether to start the DC/DC equalizing circuit according to the battery average voltage of main control module issue, finally reach the equilibrium of whole Battery pack.
Main control module is obtained the battery pack parameter by the communication with the battery parameter detection module, as: total voltage, charging and discharging currents, capacity, ambient temperature etc.
Quantity according to detection of battery number configuration voltages and balance module in the battery pack can comprise 250 batteries in maximum every Battery packs.Link to each other by communication bus between voltage detecting and balance module and the main control module.
Because what each voltage detecting and balance module detected is batteries different in the series battery, and certain voltage difference is arranged between them, so communication bus needs to isolate.
By the operation of said process, voltage detecting and balance module make that each single battery voltage reaches unanimity in the battery pack, for the calculating of capacity lays the foundation.By the discharge in short-term (about 20 minutes) to battery pack, main control module is by the capacity and the health degree of each monocell of discharge data accurately predicting of analysis-by-synthesis battery pack.
Said voltage detecting and balance module, comprise and connect subtracter, capacitance-resistance filter, multiway analog switch, single-chip microcomputer successively, the subtracter of forming by amplifier, can obtain different multiplication factors by the resistance of adjusting resistance, obtain the virtual voltage of every battery, through import the voltage of the A/D conversion mouthful every road of the acquisition battery of single-chip microcomputer after the capacitance-resistance filter filtering more respectively by multiway analog switch.
The two-way DC/DC conversion of battery balanced employing makes voltage is high in two adjacent batteries battery to the low battery charge of voltage, finally reaches the equilibrium of whole Battery pack.
Said battery parameter detection module, comprise AD chip, single-chip microcomputer, Hall element, voltage signal conditioning unit, digital temperature sensor, AD chip, digital temperature sensor connect single-chip microcomputer respectively, and Hall element, voltage signal conditioning unit connect the AD chip respectively.This module detects total voltage, charging and discharging currents, the ambient temperature of battery pack, and calculates the state and the charge/discharge capacity of battery, by isolated serial port data is passed to main control unit.
Said main control module comprises the large-screen all-in-one, adopts the industrial computer based on the ARM chip, running software WINCE.
The utility model battery is initiatively balanced to adopt monolithic processor controlled intelligent equalization technology that the float charge voltage of each battery of battery pack is reached unanimity, maximum voltage difference is (2V battery) about 20mV, make float charge voltage be controlled at optimum state, make the etch factor of battery pole plates reduce to minimum, avoid causing over-charging of battery and owe to fill, improve the useful life of battery, fail safe, the reliability of raising battery, can save considerable battery altering expense (approximately saving 30% battery expense) simultaneously.
Use the utility model to substitute the artificial capacity of regularly checking to battery, the AC power that need only turn off direct current cabinet, do not need the direct current electric loading of breaking, battery was discharged 15-20 minute naturally to load, system can go out the available capacity (being converted into the battery capacity of 10 hours discharge rates under 25 degree) and the battery health degree (representing with percentage) of battery according to information calculations such as discharging current, voltage, battery temperatures, save human and material resources, accuracy height, avoid discharging fully.And regularly the battery shallow discharge is helped cell activation, avoid long-term floating charge to cause the battery pole plates passivation.
The beneficial effects of the utility model: the initiatively equilibrium of comprehensive battery, battery capacity fast detecting, battery health degree measuring ability are, substitute the battery logging that can only detect cell voltage at present, battery useful life be can improve, safety, the reliability of transformer station direct current system improved, accurately predict the capacity and the health degree of battery, improve operation and maintenance levels, improve the automaticity of transformer station, alleviate personnel's burden, have broad application prospects.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present utility model;
Accompanying drawing 2 is the utility model voltage detecting and balance module schematic diagram;
Accompanying drawing 3 is the utility model battery pack parameter detection module schematic diagrams;
Among the figure: battery parameter detection module 1, voltage detecting and balance module 2,3,4, main control module 5, communication isolates 6,7,8,9, data/address bus 10, variable connector 11, AD chip 12, single-chip microcomputer 13,17, Hall element 14, voltage signal conditioning unit 15, digital temperature sensor 16.
Embodiment:
Below in conjunction with accompanying drawing, the utility model is described in further detail by embodiment.
Back-up source is with valve control battery group intelligence control system, comprise several voltage detecting and balance module, battery parameter detection module 1, a main control module 5, several voltage detecting and balance module, a battery parameter detection module coupling are provided with, and are connected with a main control module by communication isolation, data/address bus 10 respectively.
Execution mode more specifically:
With reference to accompanying drawing 1.
Each voltage detecting and balance module are responsible for detecting, balanced eight adjacent series-connected cells.For battery pack, expand by the mode of module cascade more than eight batteries.Link to each other by the RS-422 communication bus of isolating between each voltage detecting and balance module and main control module, pass through communication bus, voltage detecting and balance module return the cell voltage of detection to main control module, and main control module sends instruction to voltage detecting and balance module.The battery parameter detection module detects total voltage, charging and discharging currents, ambient temperature, charged state, the charge/discharge capacity of battery pack, also communicates by letter with main control module by isolating communication bus.
Concrete control flow is as follows:
Main control module sends to all voltage detecting and balance module, battery pack parameter detection module and detects instruction, and each module begins to detect simultaneously, can guarantee that like this cell voltage detects simultaneously.Delay time after 0.3 second, main control module sends the instruction that transmits detection voltage to each voltage detecting and balance module respectively, obtains the voltage of each module respectively; Send instructions to the battery parameter detection module and to obtain the battery pack parameter.Main control module calculates the average voltage of all batteries, ceiling voltage, minimum voltage, then these data are sent to each voltage detecting and balance module, each module with the numeric ratio of the magnitude of voltage that detects and these receptions is carried out equilibrium if surpass the startup value of setting then start balance module with mean value difference.
Each voltage detecting and balance module detect eight adjacent series-connected cells, because whole battery group is connected, the earth potential of each unit has very big-difference, so must be by communication light every isolation between communication bus and the module, and native system adopts high-speed light to carry out the communication isolation every 6N137.
With reference to accompanying drawing 2.
Voltage detecting and balance module schematic diagram.Detect the voltage of monocell in the series battery, and will guarantee enough accuracy of detection, adopt precision operational-amplifier to form the voltage detecting that subtracter is realized single battery.The both positive and negative polarity of a battery of input input of each subtracter is output as cell voltage.Can make output voltage equal R1/R2(V2-V1 by the ratio of setting resistance).The output of amplifier is carried out filtering by capacitance-resistance filter, to eliminate the influence of high frequency ripple to voltage measurement, by the simulation Port Multiplier A/D end of convert that the voltage of each battery is input to single-chip microcomputer is carried out the A/D conversion again.The I/O port of single-chip microcomputer is used for the start and stop of gating simulation Port Multiplier and control equalizing circuit.
Balanced way adopts the mode of two-way DC/DC conversion to transmit energy, and the high energy content of battery of voltage is transferred in the low battery of battery.Each DC/DC module input has three lines, is always just, always bearing and two battery plus-negative plate tie points of adjacent cell, as the V1 of first module access battery pack, V2, V3 voltage.If single-chip microcomputer starts this balanced unit, this balanced unit compares the voltage of adjacent cell automatically, and makes the high battery of voltage to the low battery charge of voltage, and the energy content of battery that voltage is high flows to the low battery of voltage, thereby adjacent cell voltage is reached unanimity.The balanced unit that each detects, balanced unit comprises seven batteries, be responsible for the equilibrium of eight batteries, the corresponding same battery of first balanced unit of the 7th balanced unit and next unit, so that reach two energy Flow between the unit, finally make whole Battery pack voltage reach balanced by this battery.
With reference to accompanying drawing 3.
Battery parameter detection module schematic diagram.12 AD chip AD7321 is adopted in the detection of battery voltage and charging and discharging currents, and this chip links to each other by the I2C bus with single-chip microcomputer, and the total voltage of the battery pack of detection and the charging and discharging currents of battery are passed to single-chip microcomputer.Current detecting is by Hall element, according to sense of current Hall element output+4V or-voltage of 4V, the output voltage of Hall element is imported the input of chip AD7321, convert digital signal to, pass to single-chip microcomputer by the I2C connection.Assembled battery total voltage carries out processing such as level variation, voltage-limiting protection, buffering by voltage signal conditioning unit to voltage signal, inputing to AD7321.Ambient temperature detects and adopts digital temperature sensor DS18B20, directly links to each other by the I2C bus with single-chip microcomputer, and reading temperature data is to single-chip microcomputer.
Main control module is made up of the integrated industrial computer that has touch-screen.Industrial computer has the RS-422 serial ports, by this serial bus and voltage detecting and balance module and the communication of battery parameter detection module.But by main control unit initialization system parameter, as: battery number in the battery pack, alarm voltage etc.Main control module is responsible for coordinating whole system operation, by with the serial communication of voltage detecting and balance module, obtain the voltage of all batteries, and the mean value of calculating voltage, maximum, minimum value.Give each subelement issue information of voltage according to above-mentioned value.Voltage detecting and balance module determine whether to start equalizing circuit according to the cell voltage of main control module issue.Main control module is made analyses and prediction by discharging in short-term to battery pack, the capacity of accurately predicting battery and health degree according to the voltage of battery pack parameter, each monocell.Main control module has the RJ45 Ethernet interface, can insert in the local area network (LAN) in the transformer station by this interface, and IEC61850 is provided communications protocol.
Claims (4)
1. a back-up source is with valve control battery group intelligence control system, it is characterized in that comprising several voltage detecting and balance module (2,3,4), a battery parameter detection module (1), a main control module (5), several voltage detecting and balance module, a battery parameter detection module coupling are provided with, and are connected with a main control module by communication isolation (6,7,8,9), data/address bus (10) respectively.
According to claim 1 described after stand-by power source with valve control battery group intelligence control system, it is characterized in that it is to adopt the light idol to realize isolating that said communication is isolated.
3. it is characterized in that said voltage detecting and balance module according to claim 1 or 2 described stand-by power sources afterwards with valve control battery group intelligence control system, comprise and connect subtracter, capacitance-resistance filter, multiway analog switch, single-chip microcomputer successively.
According to claim 1 or 2 described after stand-by power sources with valve control battery group intelligence control system, it is characterized in that said battery parameter detection module, comprise AD chip, single-chip microcomputer, Hall element, voltage signal conditioning unit, digital temperature sensor, AD chip, digital temperature sensor connect single-chip microcomputer respectively, and Hall element, voltage signal conditioning unit connect the AD chip respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010206053828U CN201868909U (en) | 2010-11-15 | 2010-11-15 | Valve-regulated battery pack intelligent control system for backup power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010206053828U CN201868909U (en) | 2010-11-15 | 2010-11-15 | Valve-regulated battery pack intelligent control system for backup power supply |
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| CN201868909U true CN201868909U (en) | 2011-06-15 |
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| CN2010206053828U Expired - Fee Related CN201868909U (en) | 2010-11-15 | 2010-11-15 | Valve-regulated battery pack intelligent control system for backup power supply |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023112A (en) * | 2012-12-18 | 2013-04-03 | 北车风电有限公司 | Charging device and charging method of backup power source of wind turbine generating set variable pitch system |
| CN103227489A (en) * | 2013-04-02 | 2013-07-31 | 珠海瓦特电力设备有限公司 | Active type management method and system of valve-regulated sealed lead acid storage battery pack |
| CN103401274A (en) * | 2013-06-21 | 2013-11-20 | 广东电网公司佛山供电局 | Management control system and method of transformer-station valve-regulated lead acid (VRLA) batteries |
| CN107139728A (en) * | 2017-06-16 | 2017-09-08 | 北京信息科技大学 | A kind of vehicle-mounted composite power source intelligent safety control system |
| CN107276154A (en) * | 2017-06-19 | 2017-10-20 | 广东电网有限责任公司惠州供电局 | Adaptive single battery balancer |
| CN112327195A (en) * | 2020-09-29 | 2021-02-05 | 浙江南都电源动力股份有限公司 | Battery health degree detection method |
| CN113783706A (en) * | 2021-08-26 | 2021-12-10 | 福建星云电子股份有限公司 | Multi-machine communication system and method |
-
2010
- 2010-11-15 CN CN2010206053828U patent/CN201868909U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023112A (en) * | 2012-12-18 | 2013-04-03 | 北车风电有限公司 | Charging device and charging method of backup power source of wind turbine generating set variable pitch system |
| CN103023112B (en) * | 2012-12-18 | 2015-09-09 | 北车风电有限公司 | The back-up source charging device of wind generating set pitch control system and charging method |
| CN103227489A (en) * | 2013-04-02 | 2013-07-31 | 珠海瓦特电力设备有限公司 | Active type management method and system of valve-regulated sealed lead acid storage battery pack |
| CN103227489B (en) * | 2013-04-02 | 2015-07-15 | 珠海瓦特电力设备有限公司 | Active type management method and system of valve-regulated sealed lead acid storage battery pack |
| CN103401274A (en) * | 2013-06-21 | 2013-11-20 | 广东电网公司佛山供电局 | Management control system and method of transformer-station valve-regulated lead acid (VRLA) batteries |
| CN107139728A (en) * | 2017-06-16 | 2017-09-08 | 北京信息科技大学 | A kind of vehicle-mounted composite power source intelligent safety control system |
| CN107276154A (en) * | 2017-06-19 | 2017-10-20 | 广东电网有限责任公司惠州供电局 | Adaptive single battery balancer |
| CN107276154B (en) * | 2017-06-19 | 2023-04-28 | 广东电网有限责任公司惠州供电局 | Self-adaptive storage battery monomer equalization device |
| CN112327195A (en) * | 2020-09-29 | 2021-02-05 | 浙江南都电源动力股份有限公司 | Battery health degree detection method |
| CN113783706A (en) * | 2021-08-26 | 2021-12-10 | 福建星云电子股份有限公司 | Multi-machine communication system and method |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110615 Termination date: 20181115 |