CN107819140A - All-vanadium redox flow battery system and its cooling means - Google Patents
All-vanadium redox flow battery system and its cooling means Download PDFInfo
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- CN107819140A CN107819140A CN201711205411.4A CN201711205411A CN107819140A CN 107819140 A CN107819140 A CN 107819140A CN 201711205411 A CN201711205411 A CN 201711205411A CN 107819140 A CN107819140 A CN 107819140A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04067—Heat exchange or temperature measuring elements, thermal insulation, e.g. heat pipes, heat pumps, fins
- H01M8/04074—Heat exchange unit structures specially adapted for fuel cell
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
All-vanadium redox flow battery system and its cooling means, belong to flow battery field, take Peak Load to solve the problems, such as that existing flow battery carries out electrolyte cooling in discharge regime, technical essential is：Cooling device of signal of the all-vanadium flow battery for charged state to start is sent including the monitoring device for monitoring all-vanadium flow battery charge and discharge state, and in monitoring device, the cooling device is used to cool down the electrolyte in electrolyte storage tank, and effect is：Source pump power and investment can be reduced.
Description
Technical field
The invention belongs to flow battery field, is related to a kind of extensive all-vanadium flow battery cooling system and cooling means.
Background technology
Electrolyte temperature is too high in flow battery will influence battery performance, it is also possible to cause electrolyte to crystallize, need to carry out
Appropriate cooling.
Due to discharge regime, flow battery is heat release, thus electrolyte is cooled in discharge regime in existing flow battery
Carry out, however, discharge regime cooling electrolyte can take Peak Load, reduce energy-accumulating power station peak modulation capacity and energy-accumulating power station is defeated
Go out power.
And further technical problem is used as, under existing battery operation and the electrolyte type of cooling, simply by scattered
The equipment such as industrial air conditioning electrolyte is cooled down, or be by container modularized design, each container mostly
The temperature of electrolyte is maintained by the way of air-cooled or water cooling real-time cooling.Such type of cooling power consumption is larger, substantially accounts for
The 4-5% of battery gross output, thus reduce the power output of battery.
The content of the invention
In order to solve the flow battery of existing all-vanadium redox flow battery system electrolyte cooling occupancy tune is carried out in discharge regime
The problem of peak load, the present embodiment propose following technical scheme：A kind of all-vanadium redox flow battery system, including for monitoring full vanadium liquid
The monitoring device of galvanic battery charging and discharging state, and monitoring device send signal that all-vanadium flow battery is charged state to start
Cooling system, the cooling system are used to cool down the electrolyte in electrolyte storage tank.
Further, all-vanadium redox flow battery system also includes anolyte liquid storage tank, and the cooling system includes being installed on
The electrolyte circulation line of anolyte liquid storage tank, there is electrolyte circulating pump and electrolyte heat exchanger, the electricity on the pipeline
The shell-side of solution liquid heat exchanger is electrolyte, and pipe side is the refrigeration working medium in some refrigerant lines in parallel.
Further, the heat that the evaporator of source pump is discharged by the refrigerant line Electolyte-absorptive, heat pump
The condenser of unit is cooled down by circulating cooling system to obtain cold.
Further, compressor is installed between the evaporator and condenser of source pump, the compressor can be filled by control
Control is put, is started, in the stopping of all-vanadium flow battery discharge condition in all-vanadium flow battery charged state.
Further, heat exchanger control valve is arranged on the refrigeration working medium side of electrolyte heat exchanger and/or source pump, and with
Control device connects.
Further, all-vanadium flow battery cooling system also includes the electrolyte positioned at the side of anolyte liquid storage tank
Liquid storage tank, there is electrolyte circulating pump on the electrolyte circulation line of the cathode electrolyte storage tank, and under electrolyte circulating pump
Trip connection pile, pile, which returns, is connected in cathode electrolyte storage tank.
Further, stop valve is installed on the connecting line between evaporator and condenser, in stop valve and evaporator
Between connecting line on expansion valve is installed, check-valves is installed on the connecting line between stop valve and condenser.
Further, temperature measuring equipment is arranged on the porch of the electrolyte circulating pump of anolyte liquid storage tank.
The invention further relates to a kind of all-vanadium flow battery cooling means, cooling system is in the all-vanadium flow battery charging stage pair
Electrolyte is freezed, and the timesharing for stopping refrigeration in discharge regime to form the charging stage is freezed.
The refrigeration is central refrigerating, and temprature control method is as follows：S1. single cycle temperature rise spy is determined according to test data
Linearity curve obtains the temperature characteristic curve of electrolyte；S2. after battery starts to charge up, the existing charge capacity of battery is determined, according to battery
Charge capacity, electrolyte initial temperature, battery operation control temperature, are inquired about to show that residue is filled the temperature characteristic curve of electrolyte
Temperature after electric time and the complete electric discharge of the electrolyte after terminating of discharging of battery；S3. need in battery charging process are tried to achieve according to formula
The heat to be cooled down, formula are as follows：
Q=(T1-T2) × C × V；
Q：The heat cooled down is needed in battery charging process；T：Temperature after electrolyte electric discharge；T2：Battery operation control temperature
Degree；C：Electrolyte specific heat；V：Electrolyte volume；S4. according to the remaining charging interval, the refrigeration work consumption of refrigeration system is calculated, by
This is by controlling refrigerating plant with the temperature control to electrolyte.
Beneficial effect：By such scheme, the present invention changes traditional refrigerating operaton time, by the original battery discharge stage
Refrigeration, being changed to the charging stage is freezed, and can reduce source pump power and investment, because battery energy storage is inherently used to adjust
Network load is saved, electric-net valley-electricity can more be dissolved by starting refrigeration plant in charging, thus the charging stage is to electrolyte cooling
It can no longer to take Peak Load during electric discharge, as further effect, therefore use timesharing cooling system, improve energy storage
Peak-load regulation ability about 4-5%, improve energy-accumulating power station consumption paddy electricity ability about 4-5%.
Brief description of the drawings
Fig. 1 is the structural schematic block diagram of all-vanadium redox flow battery system.
Wherein：
1. pile, 2. anolyte liquid storage tanks, 3. cathode electrolyte storage tanks, 4. electrolyte circulating pumps, 5. cooling systems, 6.
Electrolyte heat exchanger, 7. temperature measuring equipments and temperature transmitter, 8. heat exchanger control valves, 9. check-valves, 10. evaporators, 11. condensations
Device, 12. compressors, 13. expansion valves, 14. circulating cooling systems.
Embodiment
Embodiment：
In the present embodiment, which describe it is a kind of be applied to large-scale all-vanadium redox flow battery system, including pile 1, just
Pole electrolyte storage tank 2, cathode electrolyte storage tank 3, electrolyte circulating pump 4, monitoring device, cooling system 5, and pipeline；
The present embodiment is cooled down by the original battery discharge stage in order to change traditional refrigerating operaton time, is changed to charge
Stage is freezed, and to reduce source pump power and investment, the battery discharge stage discharges heat, thus substantially cold in heat release
But, i.e., discharge regime freezes, however, discharge regime is cooled down, particularly heat exchange cooling, Peak Load can be taken, and electric
Pond energy storage is inherently used to adjust network load, and electric-net valley-electricity can more be dissolved by starting refrigeration plant in charging, thus
Charging stage can no longer to take Peak Load during electric discharge to electrolyte cooling.
Thus, large-scale all-vanadium redox flow battery system should be applied to, including for monitoring all-vanadium flow battery discharge and recharge
The monitoring device of state, and cooling system 5 of signal of the all-vanadium flow battery for charged state to start is sent in monitoring device,
The cooling system 5 is used to cool down the electrolyte in electrolyte storage tank.
Monitoring device therein, can be the battery management system BMS that battery system of the prior art can all be used, should
Management system BMS is mainly the OCV for monitoring battery, is converted to SOC, then controls battery operation.
Described cooling system 5 includes electrolyte heat exchanger 6, source pump and temperature control system；Wherein temperature control system includes
Temperature measuring equipment, transmitter, control device and heat exchanger control valve 8；
Described electrolyte heat exchanger 6 is arranged at each anolyte liquid storage tank 2, and the heat exchanger is pipe shell type heat exchange
Device, wherein after described heat exchanger control valve 8 is arranged on heat exchanger refrigerant inlet valve, shell-side is electrolyte, and pipe side is refrigeration
Machine cryogen, the cryogen of each electrolyte heat exchanger 6 is in parallel, and the source pump is entered after collecting, realizes central refrigerating；The thermometric
Device is arranged on the porch of electrolyte circulating pump 4.
Source pump includes：Shut-off valve (refrigerant inlet valve), effect：Control the startup of refrigeration system, stop；Expansion valve
13, effect：Throttling arrangement, its effect in refrigeration systems is by the saturated solution under condensing pressure in condenser 11 or liquid reservoir
Evaporating pressure and evaporating temperature are down to after body or subcooled liquid throttling, while evaporator 10 is entered according to the change of load, regulation
The flow of refrigerant；Check-valves 9, effect：Prevent medium from flowing backwards, prevent the drive motor of compressor 12 from inverting；In the embodiment
In, stop valve is installed on the connecting line between evaporator 10 and condenser 11, the company between stop valve and evaporator 10
Take over and expansion valve 13 is installed on road, check-valves 9 is installed on the connecting line between stop valve and condenser 11.
The refrigerant pipe of the electrolyte heat exchanger is in parallel and discharges by the heat of electrolyte collection to supply source pump
Evaporator, the condenser of source pump cools down by circulating cooling system 14 to obtain cold energy, and this method reflects electrolyte and changed
Hot device 6 and the membership credentials of source pump.
Source pump also includes compressor, is provided between the evaporator 10 and condenser 11 of source pump 5 and is filled by control
Putting control should be started with the compressor 12 of timesharing start and stop, described compressor 12 in all-vanadium flow battery charged state, Yu Quanfan
Flow battery discharge condition stops.
In one embodiment, after the heat exchanger control valve 8 of source pump is located at heat exchanger refrigerant inlet valve, evaporating
Expansion valve 13 is installed on the connecting line between device 10 and heat exchanger control valve 8, and heat exchanger control valve 8 and condenser 11 it
Between pipeline on connect check-valves 9, shut-off valve is installed between check-valves 9 and heat exchanger control valve 8.
In another embodiment, the source pump also includes heat exchanger control valve 8, and it can be used as single part
Or the part of source pump, as being that the heat exchanger control valve 8 is arranged on the refrigeration work of source pump in source pump
Matter side, described control device is used to control source pump, or the start and stop of source pump and electrolyte heat exchanger 6, at one
In implementation, heat exchanger control valve may be also configured to that the power output of source pump is adjusted, in another embodiment
In, described control device is arranged to control the start and stop of electrolyte heat exchanger 6 by heat exchanger control valve 8 and/or adjusts it
Power output.
By such scheme, only used in shut-off valve and heat exchanger control valve 8 as start and stop effect, then only retain shut-off
Valve is in pipeline.
By the scheme in the various embodiments described above, in one embodiment, described cooling system is used to cool down electrolyte,
And the purpose that source pump is set is the startup opportunity for cooling system in order to realize central refrigerating, i.e., control device is logical
Cross heat exchanger control valve 8 and control the start and stop of electrolyte heat exchanger 6 to realize；And in another scheme, controlled by control device
Opportunity is enabled with control cooling system with the compressor 12 of timesharing start and stop.
In one embodiment, described cooling system can be the electrolyte for including being installed on anolyte liquid storage tank
Circulation line, there is electrolyte circulating pump 4 and electrolyte heat exchanger 6, the shell-side of the electrolyte heat exchanger 6 is electricity on the pipeline
Liquid is solved, pipe side is the refrigeration working medium in some refrigerant pipes in parallel.It can also be the combination of the cooling system and source pump.
In one embodiment, all-vanadium redox flow battery system also includes the negative pole positioned at the side of anolyte liquid storage tank 2
Electrolyte storage tank 3, there is electrolyte circulating pump 4 on the electrolyte circulation line of the cathode electrolyte storage tank 3, and electrolyte circulates
The downstream connection pile 1 of pump 4, pile 1, which returns, is connected in cathode electrolyte storage tank 3.
In one embodiment, temperature measuring equipment is arranged on the porch of the electrolyte circulating pump 4 of anolyte liquid storage tank 2,
Temperature measuring equipment is the monitoring for electrolyte temperature in order to coordinate in cooling means.The present invention cooling means be：
Single cycle system temperature characteristic curve is determined according to existing system test data, the curve indicates battery not
With under SOC states, heat radiation power during charging and discharging, with reference to the volume and specific heat of electrolyte, the temperature of electrolyte can be calculated
Characteristic curve is risen, controls temperature in conjunction with battery operation, the temperature is according to cell operational characteristics, electrolyte reason set in advance
Think temperature, the battery behavior of each battery manufacturers is different, and the value is generally 25-35 DEG C, so that cooling system 5 can be set in electricity
Temperature control strategy and control target temperature value in the charging process of pond.
Temperature control strategy is as follows：After battery starts to charge up, the existing charge capacity of battery is determined, according to battery charge capacity, electricity
The temperature rise curve that solution liquid initial temperature and system testing are drawn, show that battery electric discharge completely terminates rear (i.e. SOC=0) electrolyte
Temperature；According to
Q=(T1-T2) × C × V；
Q：The heat cooled down is needed in battery charging process；
T：Temperature after electrolyte electric discharge；
T2：Battery operation controls temperature；
C：Electrolyte specific heat；
V：Electrolyte volume；
The heat for needing to cool down in battery charging process can be drawn, i.e. heat pump needs the cold provided, according to residue
In the charging interval, the input power of heat pump is calculated, electrolyte temperature control is realized by PLC control devices.
Such as：29 DEG C, SOC=30% of electrolyte initial temperature, battery operation 30 DEG C of temperature of control, looks into battery temperature characteristic
Curve, obtains that battery is fully charged to need hour time T=4, and completely after electric discharge, system temperature rise is 2.6 DEG C, i.e., is now electrolysed liquid temperature
Spend for 31.6 DEG C, density of electrolyte 1440kg/m3, specific heat：3.12kj/kg.k, electrolyte volume：2×30m3=60m3, press
Calculated according to formula：
The heat Q=(temperature-battery operation control temperature after electrolyte electric discharge) for needing to cool down in battery charging process ×
Electrolyte specific heat × electrolyte volume=(31.6-30) DEG C × 3.12kj/kg.k × 60m3×1440kg/m3=431308.8kJ,
Refrigeration work consumption P=Q/T=29.952kW.
In the cooling means, as a kind of scheme, each battery unit independent control.
As another embodiment, a kind of cooling means is which described：
Single cycle system temperature rise is determined according to existing system test data, it is cold with reference to battery operation ideal temperature, setting
But temperature control strategy and control target temperature value of the system 5 in battery charging process, in battery charging process, when any
When the inlet temperature Ti of electrolyte circulating pump 4 of one separate unit is higher than 30 DEG C, the separate unit heat exchanger control valve is opened
8DZi, combined launch refrigerant circulation pump PP1 and source pump RM1, as PP1 and RM1 is in opening, according to scheme
Two adjusting heat pump unit power outputs；After a period of time cools down, when the electrolyte circulating pump 4 of any one separate unit enters
Mouth temperature Ti is down to 29 DEG C, closes separate unit heat exchanger control valve 8Dzi, until the electrolyte of all separate units circulates
When the inlet temperature T1~Tn of pump 4 is down to less than 29 DEG C, stop refrigerant circulation pump PP1 and source pump RM1.
Calculate that subsequent time cooling system 5 always freezes according to the inlet temperature of electrolyte circulating pump 4 of each separate unit of t
Demand Qt+1, adjusting heat pump unit power output；Each inlet temperature T1 of separate unit electrolyte circulating pump 4 of analysis t~
Tn, according to the temperature control strategy and temperature of scheme first from high to low priority level, adjust each separate unit heat exchange
The aperture and on off state of device temperature-sensing valve.The t+1 moment repeats above step, until the electrolyte circulating pump 4 of all separate units
Inlet temperature T1~Tn is down to less than 29 DEG C, and cooling system 5 is out of service.
In one embodiment, born to solve existing flow battery in discharge regime progress electrolyte cooling occupancy peak regulation
The problem of lotus, the present embodiment propose following technical scheme：A kind of all-vanadium flow battery cooling system, including for monitoring full vanadium liquid
The monitoring device of galvanic battery charging and discharging state, and signal that all-vanadium flow battery is charged state is sent to start in monitoring device
Cooling system, the cooling system be used in electrolyte storage tank electrolyte cool down.By such scheme, the present embodiment changes
Traditional refrigerating operaton time, cooled down by original battery discharge stage, being changed to the charging stage is freezed, and can reduce heat pump machine
Group power and investment, because battery energy storage is inherently used to adjust network load, starting refrigeration plant in charging can be more
More consumption electric-net valley-electricities, thus the charging stage electrolyte cooling can be caused no longer to take Peak Load during electric discharge, as entering
The effect of one step, therefore timesharing cooling system is used, energy-accumulating power station peak modulation capacity about 4-5% is improved, improves energy-accumulating power station consumption
Paddy electricity ability about 4-5%.
And as the solution of further technical problem, all-vanadium flow battery cooling system, in addition to anode electrolyte
Storage tank, the cooling system include the electrolyte circulation line for being installed on anolyte liquid storage tank, have electrolyte on the pipeline
Circulating pump and electrolyte heat exchanger, the shell-side of the electrolyte heat exchanger is electrolyte, and pipe side is some refrigerant pipes in parallel
In refrigeration working medium.
A kind of concrete scheme of cooling system is illustrated in the program, the startup of the cooling system passes through the startup opportunity
Logic control can realize the purpose of charging cooling.
The evaporator of the source pump absorbs the heat discharged by electrolyte, heat pump machine by the refrigerant line of parallel connection
The condenser of group is cooled down by circulating cooling system to obtain cold.By such scheme, exchanged heat using source pump cascade electrolyte
Device is as cooling system, and the refrigerant pipe (evaporator as source pump) of multiple electrolyte heat exchangers is arranged in parallel, from
And multiple electrolyte heat exchangers can be concentrated and cooled down, compared to scattered cooling or the cooling of scattered air-conditioning equipment, more concentrate
Type of cooling power consumption it is smaller, it is possible to increase the power output of flow battery.
Described circulating cooling system is air-cooled circulating cooling system and/or water-cooling circulation cooling system.
Naturally, the purpose of the circulating cooling system be in order in condenser end cooling heat exchange, thus except it is above-mentioned it is air-cooled,
Outside water-cooling system, the cooling system of remaining form of the prior art can be used.
Described all-vanadium flow battery cooling system, in addition to the electrolyte liquid positioned at the side of anolyte liquid storage tank
Storage tank, there is electrolyte circulating pump, and the downstream of electrolyte circulating pump on the electrolyte circulation line of the cathode electrolyte storage tank
Pile is connected, pile, which returns, is connected in cathode electrolyte storage tank.
It is provided between the evaporator and condenser of source pump and is controlled by control device with the compressor of timesharing start and stop, is changed
Hot device control valve is arranged on the refrigeration working medium side of heat exchanger, and is connected with control device.
Described compressor is stopped with starting in all-vanadium flow battery charged state in all-vanadium flow battery discharge condition.
Thus, scheme the opening primarily with respect to the compressor of source pump that the time-sharing charging stage of the cooling system starts
Stop what control was achieved, and the control of refrigerating capacity, cooling time can also be realized by compressor control.
Temperature measuring equipment is arranged on the porch of the electrolyte circulating pump of anolyte liquid storage tank, and temperature measuring equipment is for temperature number
According to collection, primarily to when realizing central refrigerating method, there is provided basic data.
After heat exchanger control valve is located at heat exchanger refrigerant inlet valve, the connection between evaporator and heat exchanger control valve
Expansion valve is installed on pipeline, and check-valves is connected on the pipeline between heat exchanger control valve and condenser, in check-valves with changing
Shut-off valve is installed between hot device control valve.Wherein, the effect of described shut-off valve complete switches off, although heat exchanger controls
Valve base instinct plays similar effect, however, because heat exchanger control valve can not complete switch off, for security, in check-valves
Shut-off valve, shut-off valve (refrigerant inlet valve) effect are installed between heat exchanger control valve：Control the startup of refrigeration system, stop
Only；Expand valve action：Throttling arrangement, its effect in refrigeration systems be will be under condensing pressure in condenser or liquid reservoir it is full
Evaporating pressure and evaporating temperature are down to after being throttled with liquid (or subcooled liquid), while according to the change of load, regulation, which enters, steams
Send out the flow of device refrigerant；Non-return valve action：Prevent medium from flowing backwards, preventing compressor driving motor from inverting.
A kind of all-vanadium flow battery cooling means, cooling system is in the all-vanadium flow battery charging stage to electrolyte system
It is cold, and stop freezing in discharge regime, freezed with the timesharing for forming the charging stage.
The startup for refrigeration, it is in the charging stage in the cooling means, and discharge regime is closed down for refrigeration,
So as to reduce source pump power and investment, because battery energy storage is inherently used to adjust network load, opened in charging
Dynamic refrigeration plant can more dissolve electric-net valley-electricity, thus the charging stage electrolyte cooling can no longer to take during electric discharge
Peak Load, as further effect, therefore timesharing cooling system is used, improve energy-accumulating power station peak modulation capacity about 4-5%, carry
High energy-accumulating power station consumption paddy electricity ability about 4-5%.
The refrigeration is central refrigerating, and temprature control method is as follows：
S1. determine that single cycle temperature characteristic curve obtains the temperature characteristic curve of electrolyte according to test data；
S2. after battery starts to charge up, the existing charge capacity of battery is determined, according to battery charge capacity, electrolyte initial temperature, electricity
Pond operation control temperature, the temperature characteristic curve of electrolyte is inquired about to show that the electric discharge completely of remaining charging interval and battery terminates
Temperature after electrolyte electric discharge afterwards；
S3. the heat for needing to cool down in battery charging process is tried to achieve according to formula, formula is as follows：
Q=(T1-T2) × C × V；
Q：The heat cooled down is needed in battery charging process；
T：Temperature after electrolyte electric discharge；
T2：Battery operation controls temperature；
C：Electrolyte specific heat；
V：Electrolyte volume；
S4. according to the remaining charging interval, the refrigeration work consumption of refrigeration system is calculated, from there through control refrigerating plant with right
The temperature control of electrolyte.
By above-mentioned cooling means, controlled by the operation for cooling system, battery operation is realized for the charging stage
Temperature control strategy is formulated, and accurately can realize demand modeling to the temperature of electrolyte.
It is described above, the only preferable embodiment of the invention, but the protection domain of the invention is not
This is confined to, any one skilled in the art is in the technical scope that the invention discloses, according to the present invention
The technical scheme of creation and its inventive concept are subject to equivalent substitution or change, should all cover the invention protection domain it
It is interior.
Claims (10)
1. a kind of all-vanadium redox flow battery system, it is characterised in that including the prison for monitoring all-vanadium flow battery charging and discharging state
Device is surveyed, and cooling system (5) of signal of the all-vanadium flow battery for charged state to start is sent in monitoring device, it is described cold
But system (5) is used to cool down the electrolyte in electrolyte storage tank.
2. all-vanadium redox flow battery system as claimed in claim 1, it is characterised in that described also including anolyte liquid storage tank
Cooling system includes the electrolyte circulation line for being installed on anolyte liquid storage tank, has electrolyte circulating pump (4) on the pipeline
And electrolyte heat exchanger (6), the shell-side of the electrolyte heat exchanger (6) is electrolyte, and pipe side is some refrigerant pipes in parallel
In refrigeration working medium.
3. all-vanadium redox flow battery system as claimed in claim 2, it is characterised in that the refrigerant pipe is in parallel and release is by electricity
The heat that solution liquid is collected to supply the evaporator of source pump, the condenser of source pump by circulating cooling system (14) cool down with
Obtain cold.
4. all-vanadium redox flow battery system as claimed in claim 3, it is characterised in that the evaporator (10) of source pump (5) with
It is provided between condenser (11) and is controlled by control device to start in all-vanadium flow battery charged state, all-vanadium flow battery is put
The compressor (12) that electricity condition stops.
5. all-vanadium redox flow battery system as claimed in claim 3, it is characterised in that heat exchanger control valve (8) is arranged on electrolysis
The cryogen side of liquid heat exchanger (6) and/or source pump, and be connected with control device signal.
6. the all-vanadium redox flow battery system as described in claim any one of 1-5, it is characterised in that also include being located at anolyte
The cathode electrolyte storage tank (3) of the side of liquid storage tank (2), have on the electrolyte circulation line of the cathode electrolyte storage tank (3)
Electrolyte circulating pump (4), and the downstream connection pile (1) of electrolyte circulating pump (4), pile (1), which returns, is connected in the storage of electrolyte liquid
Tank (3).
7. the all-vanadium redox flow battery system as described in claim any one of 3-5, it is characterised in that in evaporator (10) and condensation
Stop valve is installed on connecting line between device (11), expansion is installed on the connecting line between stop valve and evaporator (10)
Valve (13), check-valves (9) is installed on the connecting line between stop valve and condenser (11).
8. all-vanadium redox flow battery system as claimed in claim 7, it is characterised in that temperature measuring equipment is arranged on anode electrolyte storage
The porch of the electrolyte circulating pump (4) of tank (2).
9. a kind of all-vanadium flow battery cooling means, it is characterised in that cooling system is in the all-vanadium flow battery charging stage to electricity
Solution liquid is freezed, and the timesharing for stopping refrigeration in discharge regime to form the charging stage is freezed.
10. all-vanadium flow battery cooling means as claimed in claim 9, it is characterised in that the refrigeration is central refrigerating, temperature
It is as follows to spend control method：
S1. determine that single cycle temperature characteristic curve obtains the temperature characteristic curve of electrolyte according to test data；
S2. after battery starts to charge up, the existing charge capacity of battery is determined, is transported according to battery charge capacity, electrolyte initial temperature, battery
Row control temperature, the temperature characteristic curve of electrolyte is inquired about after electric discharge terminates completely to draw remaining charging interval and battery
Temperature after electrolyte electric discharge；
S3. the heat for needing to cool down in battery charging process is tried to achieve according to formula, formula is as follows：
Q=(T1-T2) × C × V；
Q：The heat cooled down is needed in battery charging process；
T：Temperature after electrolyte electric discharge；
T2：Battery operation controls temperature；
C：Electrolyte specific heat；
V：Electrolyte volume；
S4. according to the remaining charging interval, the refrigeration work consumption of refrigeration system is calculated, from there through control refrigerating plant with to electrolysis
The temperature control of liquid.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112952143A (en) * | 2020-12-21 | 2021-06-11 | 广东三水合肥工业大学研究院 | All-vanadium redox flow battery management method and system |
| CN112952158A (en) * | 2020-12-21 | 2021-06-11 | 广东三水合肥工业大学研究院 | Voltage balance control method for all-vanadium redox flow battery energy storage module device |
| CN114927720A (en) * | 2020-12-21 | 2022-08-19 | 广东三水合肥工业大学研究院 | Control module for heat management of all-vanadium redox flow battery |
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