CN105223517A - The online balanced monitoring method of a kind of battery pack - Google Patents
The online balanced monitoring method of a kind of battery pack Download PDFInfo
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- CN105223517A CN105223517A CN201510771008.2A CN201510771008A CN105223517A CN 105223517 A CN105223517 A CN 105223517A CN 201510771008 A CN201510771008 A CN 201510771008A CN 105223517 A CN105223517 A CN 105223517A
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Abstract
The online balanced monitoring method of a kind of battery pack, relates to power domain.The present invention is the phenomenon that there is some accumulator super-charges and another part accumulator charge less in order to solve existing battery pack, and the existing capacity needing manual detection battery pack, workload is large, inefficient problem.The present invention adopts N number of battery module battery pack in series, N number of back discharge unit is adopted to make each battery module in the case of an open circuit, can regular picture, adopt N number of cell activation unit to monitor the internal resistance of each battery module, adopt the voltage of each battery module of N number of balance module Real-Time Monitoring, adopt the open circuit signaling gathering each battery module of control module Real-time Collection, internal resistance value, capacitance and magnitude of voltage, and process, send result to Main Control Tank, Main Control Tank carries out data interaction by Ethernet and server, adopt current Hall sensor to gather the charging and discharging currents of whole battery pack simultaneously.It is monitored for battery pack balancing.
Description
Technical field
The present invention relates to the online balanced monitoring method of a kind of battery pack.Belong to power domain.
Background technology
In power industry, in electric operation power, the effect of battery pack is particularly important.Accumulator is likened to the last lifeline of security of operation by constituent parts usually.Constituent parts equipment maintenance and management department will from guaranteeing running quality; the angle of production safety and property safety payes attention to the maintenance of accumulator; when electrical grid failure, directly electric power supply will be provided to protective relaying device, shunt of closing a floodgate, control shunt and other important load by battery pack.Due to battery dispatch from the factory before design, tooling device, the factors such as quality control cause the internal resistance of every accumulator, capacity and self discharge degree not identical, and it is identical to the floating current of every accumulator when using, battery pack the quality control of running management system is not all had again in the electric operation power of all producers, result is some accumulator super-charges and another part accumulator charge less, active substance of battery is caused to come off, degenerate, the phenomenons such as positive pole grid corrosion and sulfuration occur, thus whole Battery pack can be made to occur that capacity is lost, voltage is uneven, and cell fall behind etc. situation.To bring great hidden danger to safety in production like this, and when there is electric network fault, need powered battery, and battery can not put the serious accident of electricity.
But at present, the phenomenon of some accumulator super-charges and another part accumulator charge less cannot be eliminated, allow accumulator capacity decline and feel simply helpless.Simultaneously, owing to lacking necessary special instrument instrument, also rest in manual detection level to battery group capacity test, this is that a complex operation, workload are large, the work that efficiency is extremely low, causes and fails to carry out volume test maintenance according to regulatory requirements to accumulator.At present battery pack be delivered for use from completion of works after not do the phenomenon of once thoroughly volume test so far very general.Battery is as last one critical point of electric operation power, and run if listen to let alone to be in for a long time when state is failed to understand, so hidden danger part is by numerous.As time goes on, the increase of battery tenure of use, the discontinuity events caused by battery is by hard to guard against.
Summary of the invention
The present invention is the phenomenon that there is some accumulator super-charges and another part accumulator charge less in order to solve existing battery pack, and the capacity of existing battery pack needs manual detection, and workload is large, inefficient problem.Now provide a kind of battery pack online balanced monitoring method.
The online balanced monitoring method of a kind of battery pack, the method realizes based on following system, described system comprises N number of battery module, N number of back discharge unit, N number of cell activation unit, N number of electric discharge survey appearance unit, N number of balance module, N number of collection control module, Main Control Tank and current Hall sensor, N is positive integer
N number of battery module series connection, two open circuit signaling input/output terminals of each back discharge unit connect the two ends of a battery module and two open circuit signaling input/output ends of a collection control module simultaneously,
Two internal resistance detection signal input/output terminals of each cell activation unit connect the two ends of a battery module and two internal resistance detection signal input/output ends of a collection control module simultaneously,
Each electric discharge is surveyed two the capacity check signal input/output terminals holding unit and is connected the two ends of a battery module and two capacity check signal input/output ends of a collection control module simultaneously,
Two voltage signal input/output terminals of each balance module connect the two ends of a battery module and two voltage signal input/output ends of a collection control module simultaneously,
N number of collection control module is all connected with Main Control Tank by communication bus,
The current signal output end of Main Control Tank connects the current signal input end of current Hall sensor,
The voltage signal output end of Main Control Tank connects the voltage signal inputs of voltage hall sensor;
The online balanced monitoring method of a kind of battery pack based on said system is:
Step one, adopt the open circuit signaling of each back discharge unit of N number of collection control module Real-time Collection, and control each back discharge unit and make each battery module in the case of an open circuit, can regular picture;
Meanwhile, the internal resistance of each cell activation unit of N number of collection control module Real-time Collection, when the internal resistance of battery module is greater than setting value, controls cell activation unit and carries out activation process to battery module,
Meanwhile, N number of collection control module Real-time Collection also controls the capacity that appearance unit is surveyed in each electric discharge,
Meanwhile, the voltage of each balance module of N number of collection control module Real-time Collection, when the voltage of battery module is greater than setting value, controls balance module and discharges to battery module;
Step 2, all collection control modules carry out information interaction by communication bus and Main Control Tank,
Step 3, Main Control Tank carry out data interaction by Ethernet and server, adopt current Hall sensor to gather the charging and discharging currents of whole battery pack simultaneously, voltage hall sensor is adopted to gather the voltage of whole battery pack, the equalizing voltage of each every block battery module is set according to this whole accumulator battery voltage, realizes the online balanced monitoring of battery pack.
Beneficial effect of the present invention is: be all equipped with one to each block battery module and detect maintenance module, namely comprises back discharge unit, cell activation unit, electric discharge survey appearance unit, balance module and collection control module,
Under adopting back discharge unit to make battery open circuit situation, ensure that electric battery can regular picture, when battery module is in open-circuit condition, under whole Battery pack is in charged state or discharge condition, all can maintain the charging and discharging state of whole Battery pack by this battery of auto by pass, cell activation unit, for monitoring the internal resistance of each battery module, when detecting that the internal resistance of cell increases, carries out activation to accumulator, accomplishes to pinpoint the problems in advance, thus deals with problems, adopt electric discharge to survey appearance unit not need to carry out deep discharge to each battery module, do not need manually to carry out any patching operations, detect battery capacity and only need a few minutes, adopt balance module for monitoring the voltage of each battery module, when the voltage of battery module is greater than expectation value, battery module is discharged, to make voltage stabilization, thus improve the service condition of battery, extend the life-span of battery, finally by collection control module to the voltage signal of each balance module, the internal resistance detection signal of each cell activation unit and each electric discharge are surveyed the capacity check signal holding unit and are gathered, pass to Main Control Tank by communication bus to realize controlling, Main Control Tank adopts intelligent power equipment standard, by the modeling to each block cell batteries monitoring modular, the IED node that modeling is formed is supplied to the up-stream systems such as Intelligent Substation System, for transformer station's unified operation.Main Control Tank passes to server by ethernet signal, and carry out safeguarding at the heart to each battery according to the order that server is assigned, adopt the charging and discharging currents situation of the whole battery pack of current Hall sensor Real-Time Monitoring, voltage hall sensor is adopted to gather the voltage of whole battery pack, the equalizing voltage of each every block battery module is set according to this whole accumulator battery voltage, realizes the online balanced monitoring of battery pack.This system adopts balance module to be embodied as each cell and carries out man-to-man Voltage Cortrol, guarantee that in battery pack, every battery terminal voltage is consistent, avoid overcharging and charge less, the exception that may occur for cell batteries and fault, active process, before the faults such as generation battery pack disabler, prevent in advance, reduce loss.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the online balanced monitoring method of a kind of battery pack described in embodiment one.
Embodiment
Embodiment one: illustrate present embodiment with reference to Fig. 1, the online balanced monitoring method of a kind of battery pack described in present embodiment, the method realizes based on following system, described system comprises N number of battery module 1, N number of back discharge unit 2, N number of cell activation unit 3, N number of electric discharge survey appearance unit 4, N number of balance module 5, N number of collection control module 6, Main Control Tank 7 and current Hall sensor 8, N is positive integer
N number of battery module 1 is connected, and two open circuit signaling input/output terminals of each back discharge unit 2 connect the two ends of a battery module 1 and two open circuit signaling input/output ends of a collection control module 6 simultaneously,
Two internal resistance detection signal input/output terminals of each cell activation unit 3 connect the two ends of a battery module 1 and two internal resistance detection signal input/output ends of a collection control module 6 simultaneously,
Each electric discharge is surveyed two the capacity check signal input/output terminals holding unit 4 and is connected the two ends of a battery module 1 and two capacity check signal input/output ends of a collection control module 6 simultaneously,
Two voltage signal input/output terminals of each balance module 5 connect the two ends of a battery module 1 and two voltage signal input/output ends of a collection control module 6 simultaneously,
N number of collection control module 6 is all connected with Main Control Tank 7 by communication bus,
The current signal output end of Main Control Tank 7 connects the current signal input end of current Hall sensor 8,
The voltage signal output end of Main Control Tank 7 connects the voltage signal inputs of voltage hall sensor 9;
The online balanced monitoring method of a kind of battery pack based on said system is:
Step one, adopt the open circuit signaling of each back discharge unit 2 of N number of collection control module 6 Real-time Collection, and control each back discharge unit 2 and make each battery module 1 in the case of an open circuit, can regular picture;
Meanwhile, the internal resistance of each cell activation unit 3 of N number of collection control module 6 Real-time Collection, when the internal resistance of battery module 1 is greater than setting value, controls cell activation unit 3 pairs of battery modules 1 and carries out activation process,
Meanwhile, N number of collection control module 6 Real-time Collection also controls the capacity that appearance unit 4 is surveyed in each electric discharge,
Meanwhile, the voltage of each balance module 5 of N number of collection control module 6 Real-time Collection, when the voltage of battery module 1 is greater than setting value, controls balance module 5 pairs of battery modules 1 and discharges;
Step 2, all collection control modules 6 carry out information interaction by communication bus and Main Control Tank 7,
Step 3, Main Control Tank 7 carry out data interaction by Ethernet and server, adopt current Hall sensor 8 to gather the charging and discharging currents of whole battery pack simultaneously, voltage hall sensor 9 is adopted to gather the voltage of whole battery pack, the equalizing voltage of each every block battery module is set according to this whole accumulator battery voltage, realizes the online balanced monitoring of battery pack.
In present embodiment, the major function of this system and feature:
1, accumulator on-line checkingi
The content of accumulator on-line checkingi comprises that battery voltage detects in real time, battery pack current detects in real time, monomer battery voltage detection, internal resistance of single cell detection, cell capacity detection, intelligent object temperature monitoring, environment temperature monitor.Often can save accumulator internal resistance by on-line checkingi, judge that accumulator is good and bad; Prediction accumulator capacity and life-span.On-line real time monitoring Dan body electricity pond electricity Ya ﹑ total voltage, electricity Liu ﹑ environment temperature; Regularly automatically can measure internal resistance, measuring process is without the need to manual intervention.
2, accumulator is protected online
The content that accumulator is protected online comprises the backup of cell electronics, bus loss of pressure protection.
Digital protection balance module is that every cell carries out electronics backup one to one, and increase close to when opening a way when accumulator internal resistance is abnormal, module automatically by trouble accumulator bypass, can avoid DC bus decompression.The by-pass current of each protection module allows 100A to continue one hour, and 200A continues not damage for one minute.5 batteries are allowed at most successively to open a way or open a way simultaneously and do not affect battery power discharge in interchange power failure discharge process.
3, accumulator is balanced online
The online balanced content of accumulator comprises cell pressure-limiting function, with Battery pack automatically equalizing voltage function.Digital protection balance module is that every cell carries out voltage-regulation one to one, guarantees that in battery pack, every battery terminal voltage is consistent, avoids overcharging and charge less.
4, accumulator on-line maintenance
The online balanced content of accumulator comprises that cell activates online, the cell property checked electric discharge online, program controlled automatic activation, battery discharging circulation numeration.
Cell activate online refer to long-range or local control cell batteries in order online activation can programming cell batteries automatic sequence activation, in reactivation process, any moment battery pack keeps the ability to work of more than 99.4%, and any moment exchanges to have a power failure and also can not make DC bus decompression.
The cell online property checked electric discharge refers to the property the checked electric discharge online in order of long-range or local control cell batteries, and in discharge process, any moment battery pack keeps the ability to work of more than 99.4%, and any moment exchanges to have a power failure and also can not make DC bus decompression.
5, accumulator is fault-tolerant online
The fault-tolerant online content of accumulator refer to allow new used batteries mixed, allow different manufacturers battery to use with.
Server comprises user management user profile to be arranged, adds user, fabric anomaly etc., be mainly used in priority assignation, dry contact report to the police the historical events exported in convenient other centralized monitoring systems of access, analysiss of client expert data, client database server, log services record operational process, comprise that equipment controls event, user arranges event, alarm logging etc., Report Forms Service output daily sheet, the moon form.
Embodiment two: present embodiment is described further the online balanced monitoring method of a kind of battery pack described in embodiment one, in present embodiment, communication bus adopts RS458 or CAN to realize.
Embodiment three: present embodiment is described further the online balanced monitoring method of a kind of battery pack described in embodiment one, in present embodiment, N number of balance module 5 all adopt model be PJH-2 balance module realize.
Embodiment four: present embodiment is described further the online balanced monitoring system of a kind of battery pack described in embodiment one, and in present embodiment, the number of battery module is 108.
Embodiment five: present embodiment is described further the online balanced monitoring system of a kind of battery pack described in embodiment one, in present embodiment, in step 3, the process arranging the equalizing voltage of each every block battery module according to this whole accumulator battery voltage is:
Under charging operating mode, adopt voltage hall sensor to gather battery pack actual voltage value, this magnitude of voltage, divided by battery module number in electric battery, adds the voltage difference allowing upwards to float, thus obtains the equalizing voltage of every block battery module.
In present embodiment, voltage hall sensor, for monitoring whole accumulator battery voltage, avoids the cumulative errors caused by means of only an accumulator bulk voltage in read group total group
Because the requirement arranged the equalizing voltage of every block accumulator is more accurate, so need the equalization target value calculating every block accumulator, computing method are, under charging operating mode, gather battery pack actual voltage value, this magnitude of voltage, divided by accumulator number in electric battery, adds the voltage difference allowing upwards to float.
As whole group storage battery, charging voltage 235V, totally 108 fast accumulators in group, then real time charging equalization target value is, 235/108+0.05=2.22V, and wherein 0.05 is allow upwards floating voltage value, is obtained by inquiry empirical value table.
Claims (5)
1. the online balanced monitoring method of battery pack, the method realizes based on following system, described system comprises N number of battery module (1), N number of back discharge unit (2), N number of cell activation unit (3), N number of electric discharge survey appearance unit (4), N number of balance module (5), N number of collection control module (6), Main Control Tank (7), current Hall sensor (8) and voltage hall sensor (9), N is positive integer
N number of battery module (1) is connected, two open circuit signaling input/output terminals of each back discharge unit (2) connect the two ends of a battery module (1) and two open circuit signaling input/output ends of collection control module (6) simultaneously
Two internal resistance detection signal input/output terminals of each cell activation unit (3) connect the two ends of a battery module (1) and two internal resistance detection signal input/output ends of collection control module (6) simultaneously,
Each electric discharge is surveyed two the capacity check signal input/output terminals holding unit (4) and is connected the two ends of a battery module (1) and two capacity check signal input/output ends of collection control module (6) simultaneously,
Two voltage signal input/output terminals of each balance module (5) connect the two ends of a battery module (1) and two voltage signal input/output ends of collection control module (6) simultaneously,
N number of collection control module (6) is all connected with Main Control Tank (7) by communication bus,
The current signal output end of Main Control Tank (7) connects the current signal input end of current Hall sensor (8),
The voltage signal output end of Main Control Tank (7) connects the voltage signal inputs of voltage hall sensor (9);
It is characterized in that, the online balanced monitoring method of a kind of battery pack based on said system is:
Step one, adopt the open circuit signaling of each back discharge unit (2) of N number of collection control module (6) Real-time Collection, and control each back discharge unit (2) and make each battery module (1) in the case of an open circuit, can regular picture;
Simultaneously, the internal resistance of each cell activation unit (3) of N number of collection control module (6) Real-time Collection, when the internal resistance of battery module (1) is greater than setting value, controls cell activation unit (3) and activation process is carried out to battery module (1)
Meanwhile, N number of collection control module (6) Real-time Collection also controls the capacity that appearance unit (4) is surveyed in each electric discharge,
Simultaneously, the voltage of each balance module of N number of collection control module (6) Real-time Collection (5), when the voltage of battery module (1) is greater than setting value, controls balance module (5) and battery module (1) is discharged;
Step 2, all collection control modules (6) carry out information interaction by communication bus and Main Control Tank (7),
Step 3, Main Control Tank (7) carry out data interaction by Ethernet and server, adopt current Hall sensor (8) to gather the charging and discharging currents of whole battery pack simultaneously, voltage hall sensor (9) is adopted to gather the voltage of whole battery pack, the equalizing voltage of each every block battery module is set according to this whole accumulator battery voltage, realizes the online balanced monitoring of battery pack.
2. the online balanced monitoring system of a kind of battery pack according to claim 1, is characterized in that, communication bus adopts RS458 or CAN to realize.
3. the online balanced monitoring system of a kind of battery pack according to claim 1, is characterized in that, N number of balance module (5) all adopt model be PJH-2 balance module realize.
4. the online balanced monitoring system of a kind of battery pack according to claim 1, is characterized in that, the number of battery module is 108.
5. the online balanced monitoring system of a kind of battery pack according to claim 1, is characterized in that, in step 3, the process arranging the equalizing voltage of each every block battery module according to this whole accumulator battery voltage is:
Under charging operating mode, adopt voltage hall sensor to gather battery pack actual voltage value, this magnitude of voltage, divided by battery module number in electric battery, adds the voltage difference allowing upwards to float, thus obtains the equalizing voltage of every block battery module.
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| CN111987374A (en) * | 2020-09-09 | 2020-11-24 | 南京鼎尔特科技有限公司 | Lead-acid storage battery online activation maintenance system based on forward spike pulse excitation |
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