CN205248399U - Can change battery module's energy storage battery supply system at scene - Google Patents
Can change battery module's energy storage battery supply system at scene Download PDFInfo
- Publication number
- CN205248399U CN205248399U CN201520749560.7U CN201520749560U CN205248399U CN 205248399 U CN205248399 U CN 205248399U CN 201520749560 U CN201520749560 U CN 201520749560U CN 205248399 U CN205248399 U CN 205248399U
- Authority
- CN
- China
- Prior art keywords
- battery
- battery module
- voltage
- buffer
- strings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Secondary Cells (AREA)
Abstract
The utility model provides a can change battery module's energy storage battery supply system at scene, includes: a group battery (cluster), it includes: an at least load is connected to the busbar altogether, an at least battery cluster to parallelly connected mode connects and assembles the busbar in this. The battery cluster comprises with the mode of establishing ties a plurality of battery module, and battery module comprises with the mode of establishing ties or connect in parallel a plurality of battery cell, an at least DC to DC voltage converter, this application still includes four big novel characteristics: 1. Has buffering battery cluster, produced heavy current in the twinkling of an eye when being responsible for load start -up and momentary charge. 2. Have battery module detecting system, can detect out every battery module's state respectively to send abnormal signal. 3. Have voltage balance control system, can carry out the balance of voltage with indivedual battery module that the battery cluster includes. 4. A plurality of DC to DC voltage converter have for maintain into fixing system voltage with the output voltage adjustment of every battery cluster.
Description
Technical field
The utility model relates to battery supplied system, and relating in particular to one can be at the sceneThe energy-storage battery supply system of changing battery module, this type of battery supplied system especiallyBe applicable to large-scale renewable energy generating system energy storage or medium-and-large-sized electric motor car. Wherein,Monomer buffer battery can be lead-acid battery, lithium battery, super capacitor or above threeCombination.
Background technology
Because solar energy, wind energy and electrical network requirement regulatory demand increase, relevant great RongAmount battery manufacture technology is thereupon progressive, large capacity energy-storage battery can be applicable to electric motor car,In industrial power supply system or household electricity system, each medium-sized or large-sized battery mouldPiece, is all made up of a large amount of baby batteries.
Based on above-mentioned situation, a set of large capacity energy-storage battery supply system one of traditionAs formed by connection in series-parallel by complicated and a large amount of battery units. Battery unit byLithium battery forms, and because energy density is than high, has following properties: 1. based on factoryThe difference of manufacturing process, material behavior and environmental aspect, causes battery unit (lithium electricityPond) chemical reaction cannot be identical while discharging and recharging. 2. in actual use, byIn installation site temperature contrast, quick charge/discharge flows, and causes the characteristic of cell substratesChange. 3. battery unit barrier film, because of external force factor, causes electric leakage situation to differ. OnThe situation of stating all can make in use characteristic inconsistent (voltage) of battery unit.
The basic framework of the large capacity energy-storage battery supply system of general tradition is by batteryUnit (lithium battery) is with series-parallel system composition battery module, then by battery module with stringConnection mode forms battery strings, due to the voltage of lithium cells generally aboutBetween 2.8V～4.2V, and large capacity energy-storage battery supply system needs high voltage to driveMoving, its voltage, between 360V～600V, therefore needs a large amount of serial connections. And singleBody lithium battery energy is low, therefore needs a large amount of and connects. Therefore battery unit is usingAfter a period of time, its voltage and electric power storage energy can produce difference gradually. At battery listUnit's connection in series-parallel is combined into after battery module, when the electric power storage energy of certain battery unit lower thanOr during higher than other battery. Battery module inside will form backflow, thereby causesEach battery module characteristic is inconsistent, and voltage differences occurs. If this phenomenon is not improved (electricityPress uniformity), when a certain battery strings is in the time charging, the battery module that energy is larger willCan take the lead in filling full (it is critical that voltage exceeds battery module high pressure), but other is connected with itBattery module does not also fill full, if whole crosstalk pond does not stop charging, this high voltageThe battery module situation of will overcharging, makes the battery unit in this battery moduleBecause overtension causes substrate partition absciss layer insulation degradation, produce short circuit or electric leakage,Cause battery burning or deteriorated. When a certain battery strings is in the time discharging, energy comparison is lowBattery module will take the lead in discharging (voltage is critical lower than battery module low pressure), butOther battery module of connecting is with it also not electric discharge completely, if does not stop in whole crosstalk pondOnly electric discharge, will there is overdischarge situation in this low-voltage battery module, causes thisBattery unit in battery module is deteriorated and may form load heating, and situation is seriousTime also can cause battery burning.
Lithium battery factory is in order to meet user's use habit, mostly according to visitor at presentThe voltage at family and the demand of capacity, first become battery unit connection in series-parallel(simulation passes the battery module of 12V/24V/48V50AH/100AH or more high power capacityThe specification of system lead-acid battery). Again battery module is concatenated into high-tension battery strings.Again according to the demand of large capacity energy-storage battery power system capacity, by multiple battery strings with directlyAfter stream bus-bar carries out and connects, form the direct supply load of battery pack. System simultaneouslyThe voltage that battery monitoring system monitoring battery module is installed, detects battery module at any timeThe uniformity of voltage, avoids the characteristic of battery module differ and cause disaster. SoBe designed with following pluses and minuses:
Advantage: 1. connection in series-parallel technique is simple. 2. cell monitors is taking battery module as prisonMeasurement unit, monitoring quantity significantly reduces, and saves cell monitors volume cost.
Shortcoming: 1. battery module inside is formed by the connection in series-parallel of many battery units institute, electricityCell monitoring device cannot be monitored the situation of battery unit. 2. battery unit causes battery extremelyModule is abnormal, although battery monitor monitoring is abnormal, prompting changing, due to electricityPond has been carried out a large amount of connection in series-parallel and has been connected to form huge energy with same bus-barAmount, change the battery module in battery strings to be quite not easy, and dangerous. 3.When upgrading (or repairing abnormal electrical pool unit), battery module forms after battery strings, due to electricityPond crosstalk pressure and direct current bus bar voltage are unequal, thus cannot be directly and bus-bar alsoConnection, in parallel again must make both end voltage consistent by conductive discharge or alternate manner time,Its process is very loaded down with trivial details. 4. when changing after a certain battery module, due to new battery behaviorGood, thus in the time of charging, easily make this battery strings voltage increases, but because battery strings isBe parallel to direct current bus-bar, battery strings voltage cannot increase, except form battery strings itBetween outside not current-sharing, can long lasting effect bus-bar in the poor battery strings of characteristic, permanentForm vicious circle, can affect indirectly capacity and the life-span of battery pack. 5. battery packDirectly be connected with motor by bus-bar, in the time of load startup and momentary charge, meetingHave moment large discharge current and moment recharge greatly electric current, dash current can affect lithium electricityThe life-span in pond. Battery monitor detect battery module abnormal after, send battery factory back to,Battery factory must disassemble battery module and become battery unit inspection one by one again, changesAfter abnormal electrical pool unit, recombinant is returned battery module, but new and old battery unit,Characteristic is uncontrollable, and performance of battery module is difficult for maintaining. 7. bus bar voltage can be along withThe situation of battery system electric discharge declines one by one, and its variation in voltage can be up to 25%.
Therefore the application wish to propose a kind of brand-new can change at the scene battery module andPossess the large capacity energy-storage battery supply system that buffer battery and battery pack form,This type of battery supplied system be particularly useful for large-scale renewable sources of energy energy-storage system or in largeType electric motor car, to solve the defect in prior art.
Utility model content
So the purpose of this utility model is the problem solving in above-mentioned prior art,Propose a kind of energy-storage battery supply system that can change at the scene battery module, it is excellentPoint is to utilize buffer battery string to be responsible for the wink that load startup and momentary charge produceBetween large electric current, protect other battery strings (lithium battery forms), the prolongation battery strings life-span;Each battery module of battery strings is all monitored, and carries out battery module at any timeVoltage balancing circuit, guarantees that the voltage of the battery module in any moment battery strings is equalWeighing apparatus property; Battery strings is confluxed again with always by the two-way DCtoDC electric pressure converter of direct currentRow's serial connection, each battery strings can, according to the demand of own equalizing circuit, be adjusted battery stringsSeries voltage (this mode does not affect the series voltage of other adjacent cell string).
For achieving the above object, the utility model proposes one and can change at the scene electricityThe energy-storage battery supply system of pond module, comprising:
One battery pack, it comprises: a total bus-bar, it comprises two flat cables,Be respectively the first flat cable and the second flat cable, this first flat cable andThe polarity of two flat cables is contrary, and these two flat cables can in addition and connect or go here and thereConnect at least one load, so that the electric power of battery pack is provided in to this load; At least one electricityPond string, these battery strings are connected between these two flat cables in parallel.This battery strings is made up of in the mode of series connection multiple battery modules, wherein, and this batteryModule is made up of in the mode of serial or parallel connection multiple cells; At least one DCtoDC voltage converter, each DC (directcurrent, direct current) toDC voltage transitionsDevice is connected between corresponding the first flat cable and battery strings, for by battery stringsNot specific voltage transitions becomes the fixed system voltage of the first flat cable one side; LogicalCross and close this DCtoDC electric pressure converter, can allow this battery strings depart from and always confluxRow, carries out the maintenance work of battery strings; In the time that battery pack discharges and recharges operation,This DCtoDC electric pressure converter can fill respectively in various degree to each battery stringsElectric discharge, progressively to make each battery strings capacity reach unanimity, therefore different battery stringsNot having each other situation about interfering with each other occurs. In addition, at the first flat electricityBetween cable and the second flat cable, connect buffer battery, wherein, buffer battery can be leadAcid battery, lithium battery, super capacitor or other combination etc.
Wherein, this at least one battery strings also comprises at least one buffer battery string, and this is slowRush battery strings in parallel with this total bus-bar, this buffer battery string is by multiple buffer batteriesModule forms in the mode of series connection, and wherein, this buffer battery module is by multiple monomersBuffer battery forms in the mode of serial or parallel connection;
When operation, when the load of system is risen suddenly, this buffer battery string can be immediatelyProvide required moment impact electric current, then other battery strings power supply together subsequentlyIn this load; In the time that the electric current supply of this total bus-bar reaches a stationary value, batteryString is main supply power supply, and now, the electric current supply of this buffer battery string will becomeBe bordering on zero.
Wherein, also comprise a battery module detection system, this battery module detects systemTurnkey is drawn together:
Be positioned at the voltage measurement device of battery module one side, voltage measurement device is for measuringThe output voltage values of the battery module of correspondence connecting, and magnitude of voltage is passedDeliver to the device in downstream;
One voltage measurement processor, reception is many from this battery module detection systemThe measured value of individual voltage measurement device in addition aggregation process;
One internal memory, is inside built in this voltage measurement processor, for storing this voltageThe numerical value of measurement processor;
This voltage measurement processor comprises a logical block, and this logical block has patrolsCollect judgement and calculation function, this logical block can be judged each electricity according to logic decided at the higher level but not officially announcedPond module whether normal operation, when this logical block is judged certain battery moduleWhen electric voltage exception, can export the abnormal information of this battery module to downstream unit.
Wherein, also comprise at least one balance of voltage control system, with this at least one electricityPond string is in conjunction with using, and it comprises:
One sub-bus-bar, wherein, the plurality of battery module is with the mode and this of series connectionSub-bus-bar connects, and this sub-bus-bar is also connected on this total bus-bar;
Wherein, each battery module connects a balancer separately, and this balancer hasBalance of voltage function, for the voltage of this each battery module of battery strings of balance,And control the voltage of this battery module, relative to prevent the voltage of some battery moduleIn the overtension of other battery modules or too low, each balancer can be used for detectingEach corresponding battery module is at the voltage at serial connection sub-bus-bar two ends.
Wherein, also comprise buffer battery module detection system, separately with each buffering electricityPond module connects, and this buffer battery module detection system comprises:
Multiple voltage measurement devices, each voltage measurement device is for measuring connected correspondenceThe output voltage values of one or more buffer battery modules, and magnitude of voltage is outsideTransmit;
One voltage measurement processor, receives the measurement from the plurality of voltage measurement deviceValue in addition aggregation process;
One internal memory, for storing the numerical value of this voltage measurement processor;
This voltage measurement processor comprises a logical block, and this logical block has patrolsCollect judgement and calculation function, this logical block can be judged according to logic decided at the higher level but not officially announced each slowRush whether normal operation of battery module, when this logical block is judged certain buffering electricityWhen the electric voltage exception of pond module, can export the abnormal information of this buffer battery module,To remind attendant to change this buffer battery module.
Wherein, also comprise a siren and display, be connected with this logical block,Receive the abnormal information of this battery module, and show in display, this alarmDevice can give a warning the sound remind operation or attendant, to remind attendantChange this buffer battery module.
Wherein, also comprise a siren and display, be connected with this logical block,Receive the abnormal information of this buffer battery module, and show in display, shouldSiren can give a warning the sound remind operation or attendant, to remind maintenancePersonnel change this buffer battery module.
Wherein, this buffer battery module is lead-acid battery, lithium battery, super capacitorOr above three's combination.
The application has four large novel features: 1. have buffer battery string, be responsible for loadThe instantaneous large-current producing when startup and momentary charge. 2. having battery module detectsSystem, can detect respectively the state of each battery module, and send abnormal signal.3. there is voltage balance control system, battery module voltage that can balancing battery string. 4.There are multiple DCtoDC electric pressure converters, for adjusting the output of each battery stringsVoltage is maintained in fixing bus bar voltage.
In the utility model, described DCtoDC electric pressure converter, refers to just straightThe converter that stream voltage transitions is DC voltage.
Can further understand feature of the present utility model and excellent by explanation belowPoint, please refer to accompanying drawing when reading.
Brief description of the drawings
Fig. 1: the structure block diagram of the application's assembly.
Fig. 2: the detailed structure block diagram of the application's assembly, wherein also comprises that voltage is flatWeighing apparatus control system.
Fig. 3: the schematic diagram of the application's balance of voltage control system.
Fig. 4: what the application's battery module detection system and this battery module linked showsIntention.
Fig. 5: the application's buffer battery module detection system is applied to buffer battery and showsIntention.
Fig. 6: the application schematic diagram of the application's buffer battery module, this buffer batteryModule can be lead-acid battery, lithium battery or super capacitor.
Description of reference numerals
10 battery strings
11 battery modules
12 cells
13 voltage measurement devices
14 voltage measurement processors
15 internal memories
16 logical blocks
17 sirens and display
20 buffer battery strings
21 buffer battery modules
22 monomer buffer batteries
31 anodal flat cables
32 negative pole flat cables
40 balancers
50 battery strings controllers
60 communication bus-bars
100 total bus-bars
200 sub-bus-bars
400DCtoDC electric pressure converter
Detailed description of the invention
Now just the application's structure forms, and effect and the advantage that can produce, and joinsClose accompanying drawing, a preferred embodiment of lifting the application is described in detail as follows.
Please refer to shown in Fig. 1 to Fig. 6, show of the present utility model can be at the scene moreChange the energy-storage battery supply system of battery module, the exportable higher electricity of this battery systemPress, to provide the application of large electric current (as medium-and-large-sized electric motor car, electrical network application in parallel etc.Deng), at present the actual voltage that uses upper this height volt can be 300V, 360V, 440V,576V, 600V, the application's battery system comprises following assembly:
One battery pack, it comprises:
One total bus-bar 100, comprises two flat cables, is respectively the first flat electricityCable and the second flat cable, the polarity of this first flat cable and the second flat cableOn the contrary, these two flat cables can connect load 300 in addition, with by battery packElectric power is provided in this load 300. Wherein, in the application with the motor that connects in the lump asLoad 300, but this is not limited to the application's scope.
At least one battery strings 10, these battery strings 10 are connected to this in parallelBetween two flat cables. This battery strings 10 by multiple battery modules 11 with series connectionMode form. Wherein, this battery module 11 by multiple cells 12 with stringConnection or mode in parallel form.
The application mainly has following four large novel features:
(1) there is buffer battery string 20
Wherein, this at least one battery strings 10 and at least one buffer battery string 20 and thisTotal bus-bar 100 parallel connections, this buffer battery string 20 is by multiple buffer battery modules 21Mode with series connection forms. Wherein, this buffer battery module 21 is delayed by multiple monomersRush battery 22 and form in the mode of serial or parallel connection, this monomer buffer battery 22 canFor lead-acid battery, lithium battery, super capacitor or above three's combination.
Buffer battery string 20 is responsible for dash current (large capacity charge/discharge of moment). InstituteRising suddenly when the load 300 of whole electric power system (as load startup or moment fillWhen electricity) and when electric current is sharply increased, this buffer battery string 20 can supply rapidlyShould or impact-absorbing electric current to meet the needs of system.
Other battery strings 10 (be generally the battery strings 10 that lithium battery forms, below withLithium battery explains) in parallel with this total bus-bar 100; Because lithium battery has applicableDark cycle charge discharge electrical characteristics and energy density be than high characteristic, therefore lithium battery discomfortClose dash current (large capacity charge/discharge of moment). Moment impact electric current can affect lithiumBattery life, thus power supply when system is used lithium battery as steady-state current,Can make the life of whole system.
When operation, when the load 300 of system increases suddenly (as load starts or momentCharging) time, this buffer battery string 20 can provide required moment impact electric current immediately,Then other battery strings 10 will be powered at this load 300 subsequently together. When this aggregationWhen stream row 100 electric current supply reaches a stationary value, taking other battery strings 10 asMain supply power supply, now the electric current of this buffer battery string 20 can level off to zero.
(2) battery module detection system
The application also comprises a battery module detection system, and this battery module detects systemTurnkey is drawn together:
Multiple positions are respectively at the voltage measurement device 13 of battery module 11 1 sides, and voltage is surveyedMeasuring device 13 is for measuring the output voltage values of connected corresponding battery module 11,And magnitude of voltage is sent out.
One voltage measurement processor 14, receives from this battery module detection systemThe measured value of voltage measurement device 13 in addition aggregation process;
One internal memory 15, is inside built in this voltage measurement processor 14, for storing thisThe numerical value of voltage measurement processor 14;
This voltage measurement processor 14 comprises a logical block 16, this logical block16 have logic judgement and calculation function, and this logical block 16 can be complied with logic decided at the higher level but not officially announcedJudge whether normal operation of each battery module 11, when this logical block 16 judgesWhile going out the electric voltage exception of battery module 11, can export the abnormal of this battery module 11Information is to the device (battery strings controller 50 below) in downstream.
One siren and display 17, be connected with this logical block 16, receives this electricityThe abnormal information of pond module 11, and show in display, this siren canGive a warning the sound to remind operation or attendant, to remind attendant to changeThis battery module 11.
This battery module detection system can each battery module 11 of independent detection power supplyState, and analyze relatively with other battery module 11, when battery module 11Be detected when the variation tendency of voltage differs from other battery module 11 in the running,Represent that its characteristic has occurred extremely, therefore can detect abnormal battery module11. In the time of substituted battery module 11, do not need whole battery strings 10 to cut off remittanceStream row, then check one by one out of order battery module 11. And because the application goes backThere is a balance of voltage control system, magnitude of voltage that can balancing battery module 11, soWhen after the battery module 11 more renewing, if battery module 11 voltages are higher, flatWeighing apparatus circuit can discharge automatically, if voltage is lower, balancing circuitry can enter automaticallyRow charging, can be rapidly by the voltage (energy) of the new battery module 11 of replacing and otherThe module of serial connection reaches unanimity.
Above-mentioned battery module detection system also can be applicable in buffer battery string 20,Be called buffer battery module detection system, its difference is this battery module 11For buffer battery module 21, and this cell 12 is monomer buffer battery 22,All the other application modes are all identical.
Battery module detection system, the measurement of its battery module voltage also can be by voltageBalance controller is measured simultaneously, and related data is provided.
(3) balance of voltage control system
The application also comprises at least one balance of voltage control system, this balance of voltage controlSystem processed and each battery strings 10 are in conjunction with using, and it comprises:
One sub-bus-bar 200, wherein, the plurality of battery module 11 is with the side of series connectionFormula is connected with this sub-bus-bar 200, and this sub-bus-bar 200 is also connected to this and always confluxesOn row 100.
Wherein, each battery module 11 connects a balancer 40, this balancer separately40 have balance of voltage function, for these battery strings 10 each battery modules of balance11 voltage, and control the balance of voltage of this battery module 11, to prevent some electricityThe voltage of pond module 11 is with respect to the overtension of other battery modules 11 or too low,Balancer 40 also detects the voltage at serial connection sub-bus-bar 200 two ends simultaneously. This balanceDevice 40 also can be used for measuring the temperature of each battery module 11.
One balancing circuitry bus-bar, comprises that an anodal flat cable 31 and a negative pole are flatFlat cable 32, wherein, one end of this positive pole flat cable 31 and this balancer 40Positive input terminal connect, the positive pole of other end battery module 11 corresponding to each is exportedEnd connects; The negative input of one end of this negative pole flat cable 32 and this balancer 40End connects, and the other end cathode output end of battery module 11 corresponding to each connectsConnect.
One battery strings controller 50, can be used for monitoring electricity that whole battery strings 10 containsThe voltage of pond module 11, and adjust individually battery module 11 electricity through balancerPress the object tending to balance to reach each battery module 11 voltages. This battery strings controlDevice 50 processed is communicated by letter bus-bar 60 (as RS-485, RJ-45 and other communication by oneMode) be connected with the balancer 40 of each battery module 11 (in Fig. 3 with connect squareSignal, to simplify drawing).
This battery strings controller 50 also comprises a cell voltage adjustment System, this batteryVoltage adjustment system is connected with this battery module detection system, receives this battery moduleThe voltage detecting result of detection system, complies with logic decided at the higher level but not officially announced to each battery module 11In magnitude of voltage compare, find out the battery module 11 with abnormal voltage value,Then notify this battery module 11 corresponding balancer 40, carry out other chargingOr electric discharge, make it voltage (energy) and be tending towards identical with other battery module 11.
When operation, each balancer 40 or battery module detection system are measured each battery mouldThe voltage of piece 11, and this voltage is sent back to this battery strings controller 50, by this electricityPond series controller 50 determines that according to logic decided at the higher level but not officially announced voltage and average voltage depart from excessiveBattery module 11, to carry out the balance of voltage by this balancer 40. Wherein,This logic decided at the higher level but not officially announced is got after can making all battery module 11 voltages averageThe difference of these battery module 11 voltages and average voltage exceedes a predetermined ratio(as 10%), think depart from excessive, so must carry out the balance of voltage.
(4) multiple DCtoDC electric pressure converters 400
The application also comprises multiple DCtoDC electric pressure converters 400:
Each DC (directcurrent, direct current) toDC electric pressure converter 400 connectsBetween corresponding the first flat cable of total bus-bar 100 and battery strings 10, itsIn, buffer battery string 20 does not arrange DCtoDC electric pressure converter 400. ShouldDCtoDC electric pressure converter 400 has the Voltage-output of the each battery strings 10 of balanceFunction, for becoming the first flat electricity by not specific battery strings 10 1 sides voltage transitionsThe fixed system voltage of cable one side.
The effect of this DCtoDC electric pressure converter 400 is: in the time of System OperationThe voltage at each battery strings 10 two ends can't equate, therefore in the running, and voltageLower battery strings 10 can, by control command, reduce output, allows other energyMany battery strings are discharged in advance, by so operating, can allow the appearance of each battery stringsAmount reaches unanimity gradually. 400 of this DCtoDC electric pressure converters can make eachThe voltage of battery strings 10 is fixed system voltage, so can not produce above-mentioned general biographyLoad 300 effects of the large capacity energy-storage battery supply system of uniting.
By closing this DCtoDC electric pressure converter 400, can allow this battery strings10 depart from total bus-bar 100, carry out the dress work of battery strings 10, when having keeped in repairCheng Hou, although its battery strings voltage is not identical with other crosstalk cell voltage, passes throughThe conversion of this DCtoDC, can very easily connect with total bus-bar 100Connect. In the time of total bus-bar 100 short circuit, because each battery strings 10 has DCtoDCThe automatic short-circuit protection of electric pressure converter 400, can cut off short by battery strings 10 individually, can there is not huge short circuit current in waypoint, therefore application is upper safer.
In the time discharging and recharging operation, this DCtoDC electric pressure converter 400 can be to batteryString 10 carries out independently discharging and recharging the control of import and export, therefore different battery strings 10Do not have each other situation about interfering with each other and occur, each battery strings 10 is onlyThe vertical operation that discharges and recharges of carrying out oneself.
The application's advantage is: 1. utilize buffer battery string to be responsible for load and start and winkBetween the instantaneous large-current that produces of charging, protect other battery strings (lithium battery), extendOther battery strings life-spans. Because buffer battery string may be because long-term a large amount of momentsCharging and discharging currents, causes the life-span to reduce, can separately exchange buffering battery strings, and maintenanceCost more can reduce costs more than whole Battery pack system conversion. 2. each of battery stringsBattery module is all monitored, and carries out circuit balancing, guarantees in any moment battery stringsBattery module harmony. 3. battery strings turns by the two-way DCtoDC voltage of direct currentParallel operation is connected with total bus-bar again, and each battery strings can be according to the need of own equalizing circuitAsk, adjust crosstalk and press (not affecting other battery strings). 4. abnormal when detecting battery moduleTime, as long as two-way direct current DCtoDC electric pressure converter is closed, battery stringsDepart from total bus-bar, carry out at the scene battery strings maintenance. When the abnormal electrical of battery stringsAfter pond module reparation or renewal, although battery strings voltage is different from other, can be lightEasily, by the isolation of DCtoDC electric pressure converter, be incorporated to total bus-bar, safety andEasily safeguard. 5. each battery strings balanced control voluntarily, is not subject to total bus-bar voltage disturbance,Easily balanced. 6. in when charging, by each DCtoDC electric pressure converter, can be singleSolely each battery strings is filled full according to required voltage and electric current. In the time of electric discharge, sustainableBattery strings electric energy is transformed into total bus-bar by DCtoDC electric pressure converter, reallyProtect the capacity of battery power discharge. 7. when total bus-bar short circuit, because each battery strings hasThe protection of DCtoDC short circuit current, therefore short circuit energy is less, safer in application.8. due to by isolation and the conversion of DCtoDC electric pressure converter, total bus-bar electricityThe pressure rate of change is low, is applicable to the use of all kinds of loads. 9. various loads, as medium-and-large-sized electricityMotor-car due to charging voltage grade in response to every country or regional regulation are different to some extentDifference, can adapt to all kinds of different filling to this by DCtoDC electric pressure converterElectric moter voltage. If large-scale renewable energy generating system or medium-and-large-sized electric motor car adopt thisBattery system, need be in response to the requirement of each filling apparatus electric moter voltage, and changes batterySystem.
In sum, the application's innovative design, quite realistic demand. ItsCan specifically improve prior art shortcoming, be compared to prior art, obviously have prominentThe progress of broken property, really can realize the improvement of effect, and be easy to reach. The applicationBe not disclosed on the document and market of internal and overseas, met patent statute.
Above-listed detailed description is only the tool for a possible embodiments of the present utility modelBody explanation, but this embodiment is not in order to limit protection domain of the present utility model,Allly do not depart from the equivalence that the utility model skill spirit does and implement or change, all shouldBelong to the application's scope of patent protection.
Claims (7)
1. the energy-storage battery supply system that can change at the scene battery module, is characterized in that: comprising:
One battery pack, it comprises:
One total bus-bar, comprise two flat cables, be respectively the first flat cable and the second flat cable, the polarity of this first flat cable and the second flat cable is contrary, these two flat cables can in addition and connect or be connected in series at least one load, so that the electric power of battery pack is provided in to this load;
At least one battery strings, these battery strings are connected between these two flat cables in parallel, and this battery strings is made up of in the mode of series connection multiple battery modules, and wherein, this battery module is made up of in the mode of serial or parallel connection multiple cells;
At least one DCtoDC electric pressure converter, each DCtoDC electric pressure converter is connected between corresponding the first flat cable and battery strings, for not specific battery strings voltage transitions being become to the fixed system voltage of the first flat cable one side; By closing this DCtoDC electric pressure converter, can allow this battery strings depart from total bus-bar, carry out the dress work of battery strings; In the time discharging and recharging operation, this DCtoDC electric pressure converter can independently discharge and recharge battery strings, and therefore different battery strings does not have the situation generation interfering with each other each other;
At least one balance of voltage control system, is combined utilization with this at least one battery strings, it comprises:
One sub-bus-bar, wherein, the plurality of battery module is connected with this sub-bus-bar in the mode of series connection, and this sub-bus-bar is also connected on this total bus-bar;
Wherein, each battery module connects a balancer separately, this balancer has balance of voltage function, for the voltage of this each battery module of battery strings of balance, and control the voltage of this battery module, to prevent that the voltage of some battery module is with respect to the overtension of other battery modules or too low, each balancer can be used for detecting the voltage of each corresponding battery module at serial connection sub-bus-bar two ends.
2. the energy-storage battery supply system that can change at the scene battery module as claimed in claim 1, it is characterized in that: this at least one battery strings also comprises at least one buffer battery string, this buffer battery string is in parallel with this total bus-bar, this buffer battery string is made up of in the mode of series connection multiple buffer battery modules, wherein, this buffer battery module is made up of in the mode of serial or parallel connection multiple monomer buffer batteries;
When operation, when the load of system is risen suddenly, this buffer battery string can provide required moment impact electric current immediately, and then other battery strings will be powered at this load subsequently together; In the time that the electric current supply of this total bus-bar reaches a stationary value, battery strings is main supply power supply, and now, the electric current supply of this buffer battery string will level off to zero.
3. the energy-storage battery supply system that can change at the scene battery module as claimed in claim 1 or 2, is characterized in that: also comprise a battery module detection system, this battery module detection system comprises:
Be positioned at the voltage measurement device of battery module one side, voltage measurement device is used for measuring the output voltage values of a battery module of connected correspondence, and magnitude of voltage is sent to the device in downstream;
One voltage measurement processor, receives from the measured value of multiple voltage measurement devices of this battery module detection system aggregation process in addition;
One internal memory, is inside built in this voltage measurement processor, for storing the numerical value of this voltage measurement processor;
This voltage measurement processor comprises a logical block, this logical block has logic judgement and calculation function, this logical block can be judged the whether normal operation of each battery module according to logic decided at the higher level but not officially announced, in the time that this logical block is judged the electric voltage exception of certain battery module, can export the abnormal information of this battery module to downstream unit.
4. the energy-storage battery supply system that can change at the scene battery module as claimed in claim 2, is characterized in that: also comprise buffer battery module detection system, be connected separately with each buffer battery module, this buffer battery module detection system comprises:
Multiple voltage measurement devices, each voltage measurement device is used for measuring the output voltage values of the one or more buffer battery modules of connected correspondence, and magnitude of voltage is outwards transmitted;
One voltage measurement processor, receives from the measured value of the plurality of voltage measurement device aggregation process in addition;
One internal memory, for storing the numerical value of this voltage measurement processor;
This voltage measurement processor comprises a logical block, this logical block has logic judgement and calculation function, this logical block can be judged the whether normal operation of each buffer battery module according to logic decided at the higher level but not officially announced, in the time that this logical block is judged the electric voltage exception of certain buffer battery module, can export the abnormal information of this buffer battery module, to remind attendant to change this buffer battery module.
5. the energy-storage battery supply system that can change at the scene battery module as claimed in claim 3, it is characterized in that: also comprise a siren and display, be connected with this logical block, receive the abnormal information of this battery module, and show in display, this siren can give a warning the sound remind operation or attendant, to remind attendant to change this battery module.
6. the energy-storage battery supply system that can change at the scene battery module as claimed in claim 4, it is characterized in that: also comprise a siren and display, be connected with this logical block, receive the abnormal information of this buffer battery module, and show in display, this siren can give a warning the sound remind operation or attendant, to remind attendant to change this buffer battery module.
7. the energy-storage battery supply system that can change at the scene battery module as claimed in claim 2, is characterized in that: this buffer battery module is lead-acid battery, lithium battery, super capacitor or above three's combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520749560.7U CN205248399U (en) | 2015-09-25 | 2015-09-25 | Can change battery module's energy storage battery supply system at scene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520749560.7U CN205248399U (en) | 2015-09-25 | 2015-09-25 | Can change battery module's energy storage battery supply system at scene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205248399U true CN205248399U (en) | 2016-05-18 |
Family
ID=55947475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520749560.7U Active CN205248399U (en) | 2015-09-25 | 2015-09-25 | Can change battery module's energy storage battery supply system at scene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205248399U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109050257A (en) * | 2018-08-17 | 2018-12-21 | 安徽工程大学 | A kind of new-energy automobile New Low Voltage power supply system |
-
2015
- 2015-09-25 CN CN201520749560.7U patent/CN205248399U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109050257A (en) * | 2018-08-17 | 2018-12-21 | 安徽工程大学 | A kind of new-energy automobile New Low Voltage power supply system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105140996B (en) | A kind of Li-ion batteries piles balanced management system and balance control method | |
| CN102104257B (en) | Energy storage system of apartment building, integrated power management system, and method of controlling the system | |
| CN204230982U (en) | Large Electric car battery supplied system | |
| CN106505694B (en) | A kind of management system and control method of intelligent battery group | |
| WO2011096430A1 (en) | Power supply device | |
| CN105162215B (en) | One kind is used for lead-acid batteries distributed battery management system and method in a balanced way | |
| CN201985554U (en) | Active self-management charging device for lithium ion power battery | |
| CN104993602A (en) | Modular energy storage system | |
| CN108649594B (en) | Distributed energy storage system for low-voltage distribution network | |
| CN103219766B (en) | Non-floating charge lithium electricity type station DC power system | |
| CN102468678A (en) | Power grid optimization direct current charging system | |
| CN206195347U (en) | Electric wire netting energy storage system | |
| CN203326621U (en) | Non floating charge lithium battery type DC (direct current) power system used for station | |
| CN107154666A (en) | A kind of batteries management system and electric power system | |
| Jie et al. | Design of energy storage system using retired valve regulated lead acid (VRLA) batteries in substations | |
| CN106685012A (en) | Charging control system of lithium battery and working method of charging control system | |
| CN203481854U (en) | Battery management device, power system and energy storage power station | |
| KR102284859B1 (en) | Grid participant charging system for easy management of multiple chargers | |
| CN109167111A (en) | The LiFePO4 standby battery group charging method for inhibiting circulation to generate | |
| CN205248399U (en) | Can change battery module's energy storage battery supply system at scene | |
| US20190280494A1 (en) | Method and system for managing electrochemical batteries of a power supply facility in case of battery failure | |
| CN204597550U (en) | A kind of battery pack with stand-by unit | |
| TWM519347U (en) | Large-capacity energy-storage power supply system capable of replacing battery module at site and comprising buffer battery and battery set | |
| CN103199586A (en) | -48V direct current single system double-power-source storage battery contact device and switching method thereof | |
| CN103354366A (en) | Application of floating-charge type protective lithium iron phosphate storage battery in electric power engineering DC system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |