CN104882620A - Method and device for realizing self protection on high-low temperature halt of flow battery system - Google Patents
Method and device for realizing self protection on high-low temperature halt of flow battery system Download PDFInfo
- Publication number
- CN104882620A CN104882620A CN201510203230.2A CN201510203230A CN104882620A CN 104882620 A CN104882620 A CN 104882620A CN 201510203230 A CN201510203230 A CN 201510203230A CN 104882620 A CN104882620 A CN 104882620A
- Authority
- CN
- China
- Prior art keywords
- storage tank
- pole storage
- charge
- electrolyte
- negative pole
- 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.)
- Granted
Links
Classifications
-
- 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
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
-
- 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
- H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
-
- 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0432—Temperature; Ambient temperature
-
- 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04664—Failure or abnormal function
- H01M8/04679—Failure or abnormal function of fuel cell stacks
-
- 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
-
- 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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Fuel Cell (AREA)
- Hybrid Cells (AREA)
Abstract
The invention discloses a method and a device for realizing self protection on high-low temperature halt of a flow battery system. The method comprises the following steps: judging whether the flow battery system receives a halt command or is in a halt state, and monitoring environment temperature T if the flow battery system receives a halt command or is in a halt state; determining the normal range of SOC (state of charge) of an electrolyte in a positive electrode storage or a negative electrode storage tank according to the environment temperature T; and judging whether the SOC of the electrolyte in the positive electrode storage or the negative electrode storage tank is within respective corresponding normal range, and reducing the SOC of the electrolyte in the positive electrode storage or the SOC of the electrolyte in the negative electrode storage tank if the SOC of the electrolyte in the positive electrode storage or the negative electrode storage tank is not within the respective corresponding normal range. The method and the device are capable of improving the electrolyte stability of the flow battery system under a high-low temperature halt condition, improving the self protection capability of the flow battery system, reducing the capacitance loss under a high-low temperature condition, prolonging the service life and improving the performance of a flow battery.
Description
Technical field
The present invention relates to a kind of flow battery system high/low temperature and shut down self-protection method and device thereof.
Background technology
Flow battery has flexible design (power and capacity can independent design), long service life, charge-discharge performance are good, addressing is free, energy efficiency is high, safety and environmental protection, maintenance cost are low and easily realize the plurality of advantages not available for other conventional batteries such as scale electric power storage.During practical application, flow battery can be widely used in the renewable energy system such as wind energy, solar energy as energy-storage system, enables the output of the electric power continous-stable of generation; Also can be used for carrying out peak load shifting to electrical network, the power storage of low power consumption be got up, exports when peak of power consumption, carry out balancing electric power supply and demand with this; In addition, as emergency power system and stand-by station etc., one of energy storage technology of most Commercial Prospect can also be considered to.At present, multiple country builds up the flow battery demonstration system of kW ~ MW level in succession, is matched in the renewable energy system such as solar energy, wind energy and plays the effects such as level and smooth output, tracking plan generating, balanced load and peak load shifting.
In the actual application of flow battery system, shutdown situation can be there is according to actual needs, and sometimes downtime longer; The SOC of flow battery system during appearance shutdown situation is random often, SOC between 0 ~ 100% all likely, when shutting down in the charged situation of flow battery system, the situation of pile is damaged due to inner self discharge, by the mode of outer meeting resistance, the electrolyte in pile is discharged in prior art, thus reach the effect of protection flow battery system, and electrolyte in both positive and negative polarity electrolyte storage tank is due to the stopping of circulating pump, there is no the passage of self discharge, cannot realize shutting down electric discharge; But under the flow battery system after shutting down is in low temperature environment, as in prolonged storage in the winter time, because the tolerance of divalent vanadium ion is poor, then easily occur the situation of divalent vanadium ion crystallization in electrolyte, the crystal of precipitation partly will enter in pile when flow battery system carries out startup and charge and discharge cycles and damage ion-conducting membrane material; Similarly; under the flow battery system after shutting down is in hot environment, because 5 valency vanadium ions cannot bear higher temperature, then after ambient temperature is higher than uniform temperature; 5 valency vanadium ions can form Precipitation, thus obviously can reduce performance and the life-span of flow battery system.Based on the temperature tolerance of different SOC electrolyte---electrolyte liquid low-temperature stability is different with anode electrolyte high-temperature stability, therefore develops a kind of general flow battery system high/low temperature shutdown self-shield scheme very necessary.
Summary of the invention
The present invention is directed to the proposition of above problem, and develop a kind of flow battery system high/low temperature shutdown self-protection method and device thereof.
Technological means of the present invention is as follows:
A kind of flow battery system high/low temperature shuts down self-protection method, and described flow battery system comprises at least one pile, positive pole storage tank, negative pole storage tank and circulating pump, and described method comprises the steps:
Step 1: judge whether flow battery system receives halt instruction or be in stopped status, is, performs step 2, otherwise continue to perform step 1;
Step 2: monitoring of environmental temperature T;
Step 3: judge that whether ambient temperature T is higher than equaling the first temperature threshold or lower than equaling the second temperature threshold, being perform step 4, otherwise returning step 2;
Step 4: monitor the electrolyte state-of-charge in positive pole storage tank and negative pole storage tank;
Step 5: environmentally temperature T determines the normal range (NR) of the electrolyte state-of-charge in positive pole storage tank or negative pole storage tank;
Step 6: judge whether the electrolyte state-of-charge in positive pole storage tank or negative pole storage tank is in each self-corresponding normal range (NR), is return step 2, otherwise perform step 7;
Step 7: reduce the electrolyte state-of-charge in positive pole storage tank and/or the electrolyte state-of-charge in negative pole storage tank;
Further, described step 7 is specially:
Electrolyte in electrolyte in positive pole storage tank and negative pole storage tank is delivered in a mixing storage tank and mixes;
Mixed electrolyte is returned and is delivered to positive pole storage tank and negative pole storage tank;
Further, described step 7 is specially:
Be communicated with positive pole storage tank and negative pole storage tank;
Electrolyte in positive pole storage tank is delivered to negative pole storage tank, and/or the electrolyte in negative pole storage tank is delivered to positive pole storage tank;
Further, described step 7 is specially:
Additive is applied in positive pole storage tank and/or negative pole storage tank;
Further, described step 4 is specially:
When ambient temperature T is higher than when equaling the first temperature threshold, the electrolyte state-of-charge in monitoring positive pole storage tank;
When ambient temperature T is lower than when equaling the second temperature threshold, the electrolyte state-of-charge in monitoring negative pole storage tank.
A kind of flow battery system high/low temperature shuts down self-protecting device, and described flow battery system comprises at least one pile, positive pole storage tank, negative pole storage tank and circulating pump, and described device comprises:
For judging whether flow battery system receives halt instruction or be in the self-shield judge module of stopped status;
Connect described self-shield judge module, for receive when flow battery system halt instruction or flow battery system shut down after the temperature monitoring module of monitoring of environmental temperature T;
Connect temperature monitoring module, for judging ambient temperature T whether higher than equaling the first temperature threshold or lower than the temperature judge module equaling the second temperature threshold;
Connect temperature judge module, for when ambient temperature T is higher than when equaling the first temperature threshold, monitor the monitoring modular I of the electrolyte state-of-charge in positive pole storage tank;
Connect temperature judge module, for when ambient temperature T is lower than when equaling the second temperature threshold, monitor the monitoring modular II of the electrolyte state-of-charge in negative pole storage tank;
Connect temperature monitoring module, determine the acquisition module of the normal range (NR) of the electrolyte state-of-charge in positive pole storage tank or negative pole storage tank for environmentally temperature T;
Connect monitoring modular I, monitoring modular II and acquisition module, whether the electrolyte state-of-charge for judging in positive pole storage tank or negative pole storage tank is in the state-of-charge judge module in each self-corresponding normal range (NR);
Connect state-of-charge judge module, for not being in the normal range (NR) of its correspondence when the electrolyte state-of-charge in positive pole storage tank, or when the electrolyte state-of-charge in negative pole storage tank is not in the normal range (NR) of its correspondence, controls flow battery system and carry out the control module that electrolyte state-of-charge reduces operation;
In addition, described device also comprises:
Connect described positive pole storage tank and negative pole storage tank, for the mixing storage tank carrying the electrolyte of coming to mix to positive pole storage tank and negative pole storage tank; In described mixing storage tank, mixed electrolyte returns and is delivered to positive pole storage tank and negative pole storage tank;
Be placed between positive pole storage tank and mixing storage tank and the transfer pipeline be placed between negative pole storage tank and mixing storage tank;
For the electrolyte in positive pole storage tank and negative pole storage tank being delivered to respectively the delivery pump of described mixing storage tank; When the electrolyte state-of-charge in positive pole storage tank is not in the normal range (NR) of its correspondence, or when the electrolyte state-of-charge in negative pole storage tank is not in the normal range (NR) of its correspondence, described control module controls described transfer pipeline and connects and the unlatching of described delivery pump; When the electrolyte state-of-charge in positive pole storage tank is in the normal range (NR) of its correspondence, or when the electrolyte state-of-charge in negative pole storage tank is in the normal range (NR) of its correspondence, described control module controls described transfer pipeline and disconnects and the closedown of described delivery pump;
Further, the volume of described mixing storage tank is 10% ~ 30% of positive pole flask volume or negative pole flask volume; Described delivery pump rated power is 10% ~ 50% of described circulating pump rated power;
In addition, described device also comprises:
Be arranged on the connecting pipeline between positive pole storage tank and negative pole storage tank; The electrolyte state-of-charge that described control module is worked as in positive pole storage tank is not in the normal range (NR) of its correspondence, or when the electrolyte state-of-charge in negative pole storage tank is not in the normal range (NR) of its correspondence, controls described connecting pipeline and connect;
In addition, described device also comprises:
According to the electrolyte state-of-charge in positive pole storage tank and negative pole storage tank, calculate the computing module of institute's expense additive;
The interpolation module of described additive is applied in positive pole storage tank and/or negative pole storage tank; The electrolyte state-of-charge that described control module is worked as in positive pole storage tank is not in the normal range (NR) of its correspondence, or when the electrolyte state-of-charge in negative pole storage tank is not in the normal range (NR) of its correspondence, control described computing module and carry out institute's expense additive calculating operation, and control described interpolation module carry out described consumption additive add operation.
Owing to have employed technique scheme, flow battery system high/low temperature provided by the invention shuts down self-protection method and device thereof, the change of environmentally temperature can automatically adjust electrolyte state-of-charge in electrolyte storage tank, when time too high or too low for temperature, monitor the electrolyte state-of-charge in positive pole storage tank or the electrolyte state-of-charge in negative pole storage tank respectively, and the normal range (NR) of the environmentally corresponding relation determination electrolyte state-of-charge of temperature and electrolyte state-of-charge, when the electrolyte state-of-charge monitored is not in aforementioned normal range (NR), then set up the self discharge passage of the electrolyte in both positive and negative polarity storage tank, realize the high/low temperature self-shield operation after flow battery system shutdown, the electrolyte stability that flow battery system is shut down under high/low temperature can be improved, promote the self-shield ability of flow battery system, reduce the loss of capacitance in high/low temperature situation, improve flow battery life-span and performance, in the implementation procedure of protected mode, electrolyte does not flow through pile, the secondary avoiding pile shuts down discharge process.
Accompanying drawing explanation
Fig. 1 is the flow chart of the method for the invention;
Fig. 2 is the apparatus structure schematic diagram of the embodiment of the present invention 1;
Fig. 3 is the apparatus structure schematic diagram of the embodiment of the present invention 2;
Fig. 4 is the apparatus structure schematic diagram of the embodiment of the present invention 3;
Fig. 5-a is the relation curve of state of charge of anode electrolyte (SOC) and anode electrolyte current potential;
Fig. 5-b is the relation curve of electrolyte liquid state-of-charge (SOC) and electrolyte liquid current potential;
In figure: 1, pile, 2, positive pole storage tank, 3, negative pole storage tank, 4, circulating pump, 5, storage tank is mixed, 6, transfer pipeline, 7, delivery pump, 8, valve, 9, connecting pipeline, 10, add module, the 101, first additive storage apparatus, 102, Second addition storage apparatus.
Embodiment
As shown in Figure 1, a kind of flow battery system high/low temperature shuts down self-protection method, and described flow battery system comprises at least one pile, positive pole storage tank, negative pole storage tank and circulating pump, and described method comprises the steps:
Step 1: judge whether flow battery system receives halt instruction or be in stopped status, is, performs step 2, otherwise continue to perform step 1;
Step 2: monitoring of environmental temperature T;
Step 3: judge that whether ambient temperature T is higher than equaling the first temperature threshold or lower than equaling the second temperature threshold, being perform step 4, otherwise returning step 2;
Step 4: monitor the electrolyte state-of-charge in positive pole storage tank and negative pole storage tank;
Step 5: environmentally temperature T determines the normal range (NR) of the electrolyte state-of-charge in positive pole storage tank or negative pole storage tank;
Step 6: judge whether the electrolyte state-of-charge in positive pole storage tank or negative pole storage tank is in each self-corresponding normal range (NR), is return step 2, otherwise perform step 7;
Step 7: reduce the electrolyte state-of-charge in positive pole storage tank and/or the electrolyte state-of-charge in negative pole storage tank;
Further, described step 7 is specially:
Electrolyte in electrolyte in positive pole storage tank and negative pole storage tank is delivered in a mixing storage tank and mixes;
Mixed electrolyte is returned and is delivered to positive pole storage tank and negative pole storage tank;
Further, described step 7 is specially:
Be communicated with positive pole storage tank and negative pole storage tank;
Electrolyte in positive pole storage tank is delivered to negative pole storage tank, and/or the electrolyte in negative pole storage tank is delivered to positive pole storage tank;
Further, described step 7 is specially:
Additive is applied in positive pole storage tank and/or negative pole storage tank;
Further, described step 4 is specially:
When ambient temperature T is higher than when equaling the first temperature threshold, the electrolyte state-of-charge in monitoring positive pole storage tank;
When ambient temperature T is lower than when equaling the second temperature threshold, the electrolyte state-of-charge in monitoring negative pole storage tank.
Wherein, reduce the electrolyte state-of-charge in positive pole storage tank and/or the electrolyte state-of-charge in negative pole storage tank, be preferably and reduce the electrolyte state-of-charge in positive pole storage tank and/or the electrolyte state-of-charge in the negative pole storage tank upper limit place to state-of-charge normal range (NR), and then can ensure that the capacity relative that flow battery system reduces is less, be beneficial to the capacity can releasing more capacity or needs when flow battery system starts again less.
Described additive is glucose, fructose, citric acid, ascorbic acid, EDTA, ethylene glycol, acetaldehyde, glycerine, oxygen, hydrogen peroxide etc.; Electrolyte state-of-charge in positive pole storage tank or negative pole storage tank can be obtained by potential monitoring mode.
Fig. 2 shows the apparatus structure schematic diagram of the embodiment of the present invention 1, as shown in Figure 2, a kind of flow battery system high/low temperature shuts down self-protecting device, described flow battery system comprises at least one pile 1, positive pole storage tank 2, negative pole storage tank 3 and circulating pump 4, and described device comprises: for judging whether flow battery system receives halt instruction or be in the self-shield judge module of stopped status; Connect described self-shield judge module, for receive when flow battery system halt instruction or flow battery system shut down after the temperature monitoring module of monitoring of environmental temperature T; Connect temperature monitoring module, for judging ambient temperature T whether higher than equaling the first temperature threshold or lower than the temperature judge module equaling the second temperature threshold; Connect temperature judge module, for when ambient temperature T is higher than when equaling the first temperature threshold, monitor the monitoring modular I of the electrolyte state-of-charge in positive pole storage tank 2; Connect temperature judge module, for when ambient temperature T is lower than the second temperature threshold, the monitoring modular II of the electrolyte state-of-charge in monitoring negative pole storage tank 3; Connect temperature monitoring module, determine the acquisition module of the normal range (NR) of the electrolyte state-of-charge in positive pole storage tank 2 or negative pole storage tank 3 for environmentally temperature T; Connect monitoring modular I, monitoring modular II and acquisition module, whether the electrolyte state-of-charge for judging in positive pole storage tank 2 or negative pole storage tank 3 is in the state-of-charge judge module in each self-corresponding normal range (NR); Connect state-of-charge judge module, for not being in the normal range (NR) of its correspondence when the electrolyte state-of-charge in positive pole storage tank 2, or when the electrolyte state-of-charge in negative pole storage tank 3 is not in the normal range (NR) of its correspondence, controls flow battery system and carry out the control module that electrolyte state-of-charge reduces operation; Described device also comprises: connect described positive pole storage tank 2 and negative pole storage tank 3, for the mixing storage tank 5 carrying the electrolyte of coming to mix to positive pole storage tank 2 and negative pole storage tank 3; In described mixing storage tank 5, mixed electrolyte returns and is delivered to positive pole storage tank 2 and negative pole storage tank 3; Be placed between positive pole storage tank 2 and mixing storage tank 5 and the transfer pipeline 6 be placed between negative pole storage tank 3 and mixing storage tank 5; For the electrolyte in positive pole storage tank 2 and negative pole storage tank 3 being delivered to respectively the delivery pump 7 of described mixing storage tank 5; When the electrolyte state-of-charge in positive pole storage tank 2 is not in the normal range (NR) of its correspondence, or when the electrolyte state-of-charge in negative pole storage tank 3 is not in the normal range (NR) of its correspondence, described control module controls the connection of described transfer pipeline 6 and described delivery pump 7 is opened; Further, when the electrolyte state-of-charge in positive pole storage tank 2 is in the normal range (NR) of its correspondence, or when the electrolyte state-of-charge in negative pole storage tank 3 is in the normal range (NR) of its correspondence, described control module controls the disconnection of described transfer pipeline 6 and described delivery pump 7 cuts out; Further, the volume of described mixing storage tank 5 is 10% ~ 30% of positive pole flask volume or negative pole flask volume; Described delivery pump 7 rated power is 10% ~ 50% of described circulating pump rated power; Described control module controls switching on and off of transfer pipeline 6 by the valve 8 be placed on described transfer pipeline 6.
Fig. 3 shows the apparatus structure schematic diagram of the embodiment of the present invention 2, as shown in Figure 3, a kind of flow battery system high/low temperature shuts down self-protecting device, described flow battery system comprises at least one pile 1, positive pole storage tank 2, negative pole storage tank 3 and circulating pump 4, and described device comprises: for judging whether flow battery system receives halt instruction or be in the self-shield judge module of stopped status; Connect described self-shield judge module, for receive when flow battery system halt instruction or flow battery system shut down after the temperature monitoring module of monitoring of environmental temperature T; Connect temperature monitoring module, for judging ambient temperature T whether higher than equaling the first temperature threshold or lower than the temperature judge module equaling the second temperature threshold; Connect temperature judge module, for when ambient temperature T is higher than when equaling the first temperature threshold, monitor the monitoring modular I of the electrolyte state-of-charge in positive pole storage tank 2; Connect temperature judge module, for when ambient temperature T is lower than when equaling the second temperature threshold, monitor the monitoring modular II of the electrolyte state-of-charge in negative pole storage tank 3; Connect temperature monitoring module, determine the acquisition module of the normal range (NR) of the electrolyte state-of-charge in positive pole storage tank 2 or negative pole storage tank 3 for environmentally temperature T; Connect monitoring modular I, monitoring modular II and acquisition module, whether the electrolyte state-of-charge for judging in positive pole storage tank 2 or negative pole storage tank 3 is in the state-of-charge judge module in each self-corresponding normal range (NR); Connect state-of-charge judge module, for not being in the normal range (NR) of its correspondence when the electrolyte state-of-charge in positive pole storage tank 2, or when the electrolyte state-of-charge in negative pole storage tank 3 is not in the normal range (NR) of its correspondence, controls flow battery system and carry out the control module that electrolyte state-of-charge reduces operation; Described device also comprises: be arranged on the connecting pipeline 9 between positive pole storage tank 2 and negative pole storage tank 3; The electrolyte state-of-charge that described control module is worked as in positive pole storage tank 2 is not in the normal range (NR) of its correspondence, or when the electrolyte state-of-charge in negative pole storage tank 3 is not in the normal range (NR) of its correspondence, controls described connecting pipeline 9 and connect; Further, when the electrolyte state-of-charge in positive pole storage tank 2 is in the normal range (NR) of its correspondence, or when the electrolyte state-of-charge in negative pole storage tank 3 is in the normal range (NR) of its correspondence, described control module controls described connecting pipeline 9 and disconnects; Described control module controls switching on and off of connecting pipeline 9 by the valve 8 be placed on described connecting pipeline 9.
Fig. 4 is the apparatus structure schematic diagram of the embodiment of the present invention 3, as shown in Figure 4, a kind of flow battery system high/low temperature shuts down self-protecting device, described flow battery system comprises at least one pile 1, positive pole storage tank 2, negative pole storage tank 3 and circulating pump 4, and described device comprises: for judging whether flow battery system receives halt instruction or be in the self-shield judge module of stopped status; Connect described self-shield judge module, for receive when flow battery system halt instruction or flow battery system shut down after the temperature monitoring module of monitoring of environmental temperature T; Connect temperature monitoring module, for judging ambient temperature T whether higher than equaling the first temperature threshold or lower than the temperature judge module equaling the second temperature threshold; Connect temperature judge module, for when ambient temperature T is higher than when equaling the first temperature threshold, monitor the monitoring modular I of the electrolyte state-of-charge in positive pole storage tank 2; Connect temperature judge module, for when ambient temperature T is lower than when equaling the second temperature threshold, monitor the monitoring modular II of the electrolyte state-of-charge in negative pole storage tank 3; Connect temperature monitoring module, determine the acquisition module of the normal range (NR) of the electrolyte state-of-charge in positive pole storage tank 2 or negative pole storage tank 3 for environmentally temperature T; Connect monitoring modular I, monitoring modular II and acquisition module, whether the electrolyte state-of-charge for judging in positive pole storage tank 2 or negative pole storage tank 3 is in the state-of-charge judge module in each self-corresponding normal range (NR); Connect state-of-charge judge module, for not being in the normal range (NR) of its correspondence when the electrolyte state-of-charge in positive pole storage tank 2, or when the electrolyte state-of-charge in negative pole storage tank 3 is not in the normal range (NR) of its correspondence, controls flow battery system and carry out the control module that electrolyte state-of-charge reduces operation; Described device also comprises: according to the electrolyte state-of-charge in positive pole storage tank 2 and negative pole storage tank 3, calculates the computing module of institute's expense additive; The interpolation module 10 of described additive is applied in positive pole storage tank 2 and/or negative pole storage tank 3; The electrolyte state-of-charge that described control module is worked as in positive pole storage tank 2 is not in the normal range (NR) of its correspondence, or when the electrolyte state-of-charge in negative pole storage tank 3 is not in the normal range (NR) of its correspondence, control described computing module and carry out institute's expense additive calculating operation, and control described interpolation module 10 carry out described consumption additive add operation; Described computing module connects described monitoring modular I and monitoring modular II; Particularly, computing module according to the electrolyte state-of-charge in positive pole storage tank 2 and negative pole storage tank 3 calculate institute's expense additive implementation procedure can REFERENCE TO RELATED people in the application number that on December 29th, 2012 applies for be 201210591063.X, denomination of invention is the patent application document content of " organic molecule is as the application of all-vanadium flow battery capacity restoration additive ", capacity restoration additive is wherein the additive in the application; Described interpolation module 10 comprises the first additive storage apparatus 101 and Second addition storage apparatus 102, first additive storage apparatus 101 connects positive pole storage tank inlet by pipeline, Second addition storage apparatus 102 connects negative pole storage tank inlet by pipeline, pipeline on pipeline between first additive storage apparatus 101 and positive pole storage tank inlet and between Second addition storage apparatus 102 and negative pole storage tank inlet is provided with electromagnetically operated valve, the control of control module by utilizing the break-make of solenoid control pipeline to realize adding additive operation.
The present invention indicates the minimum and the highest tolerable temperature that the different state-of-charge of electrolyte is corresponding different, and Fig. 5-a shows the relation curve of state of charge of anode electrolyte (SOC) and anode electrolyte current potential, Fig. 5-b shows the relation curve of electrolyte liquid state-of-charge (SOC) and electrolyte liquid current potential, table 1-a give the example of the data relationship between state of charge of anode electrolyte and ambient temperature, and table 1-b give the example of the data relationship between electrolyte liquid state-of-charge and ambient temperature, setting the first temperature threshold is 30 DEG C, then when ambient temperature T is higher than equaling the first temperature threshold namely higher than when equaling 30 DEG C, electrolyte state-of-charge in positive pole storage tank is monitored, setting the second temperature threshold is 20 DEG C, when ambient temperature T is lower than equaling the second temperature threshold namely lower than when equaling 20 DEG C, electrolyte state-of-charge in anticathode storage tank is monitored, such as current environmental temperature is 10 DEG C, judge that this temperature is lower than the second temperature threshold 20 DEG C, electrolyte state-of-charge then in anticathode storage tank is monitored, and the normal range (NR) of electrolyte state-of-charge that environmentally temperature 10 DEG C is determined in negative pole storage tank is 0% ~ 40%, judge current electrolyte state-of-charge in negative pole storage tank whether in this normal range (NR) further, suppose that the current electrolyte state-of-charge in negative pole storage tank is 80%, namely this value is not in normal range (NR), then need to perform the electrolyte state-of-charge operation reduced in negative pole storage tank, such as current environmental temperature is 37 DEG C, judge that this temperature is higher than the first temperature threshold 30 DEG C, then the electrolyte state-of-charge in positive pole storage tank is monitored, and the normal range (NR) of electrolyte state-of-charge that environmentally temperature 37 DEG C is determined in positive pole storage tank is 0% ~ 65%, judge current electrolyte state-of-charge in positive pole storage tank whether in this normal range (NR) further, suppose that the current electrolyte state-of-charge in positive pole storage tank is 80%, namely this value is not in normal range (NR), then need to perform the electrolyte state-of-charge operation reduced in positive pole storage tank.
Data relationship example between table 1-a. state of charge of anode electrolyte and ambient temperature.
| Ambient temperature | Electrolyte liquid state-of-charge normal range (NR) |
| 30℃ | 0％～85％ |
| 37℃ | 0％～65％ |
| 42℃ | 0％～52％ |
| 45℃ | 0％～15％ |
Data relationship example between table 1-b. electrolyte liquid state-of-charge and ambient temperature.
| Ambient temperature | State of charge of anode electrolyte normal range (NR) |
| 20℃ | 0％～85％ |
| 15℃ | 0％～60％ |
| 10℃ | 0％～40％ |
| 5℃ | 0％～5％ |
Above data are all for total vanadium 1.5 ± 0.1M, SO
4 2-the V electrolyte of=4.0 ± 0.1M.
Under normal circumstances, electrolyte in positive pole storage tank is the vanadium ion solution of 4 valencys and the mixing of 5 valencys, electrolyte in negative pole storage tank is the vanadium ion solution of divalent and the mixing of 3 valencys, electrolyte in electrolyte in positive pole storage tank and negative pole storage tank mixes by the present invention in electrolyte container, or mixed, during mixing in positive pole storage tank or negative pole storage tank by connecting pipeline: electrolyte liquid reacts: V
2++ V
4+→ V
3+, anode electrolyte reacts: V
5++ V
3+→ V
4+, namely mixed electrolyte is V
3+/ V
4+solution, pure V
3+, V
4+the theoretical electrical potential difference of valency solution only has 0.2V.
The combined amount of anode electrolyte of the present invention and electrolyte liquid can be determined in the following manner: at flow battery system after repeatedly circular flow, the both positive and negative polarity electrolyte SOC (active material concentration poor) of those skilled in the art by detecting, the surplus of active material can be known, according to both positive and negative polarity active material average price, directly carry out trim, can know that both positive and negative polarity storage tank needs the electrolyte volume exported.
Flow battery system high/low temperature provided by the invention shuts down self-protection method and device thereof, the change of environmentally temperature can automatically adjust electrolyte state-of-charge in electrolyte storage tank, when time too high or too low for temperature, monitor the electrolyte state-of-charge in positive pole storage tank or the electrolyte state-of-charge in negative pole storage tank respectively, and the normal range (NR) of the environmentally corresponding relation determination electrolyte state-of-charge of temperature and electrolyte state-of-charge, when the electrolyte state-of-charge monitored is not in aforementioned normal range (NR), then set up the self discharge passage of the electrolyte in both positive and negative polarity storage tank, realize the high/low temperature self-shield operation after flow battery system shutdown, the electrolyte stability that flow battery system is shut down under high/low temperature can be improved, promote the self-shield ability of flow battery system, reduce the loss of capacitance in high/low temperature situation, improve flow battery life-span and performance, in the implementation procedure of protected mode, electrolyte does not flow through pile, the secondary avoiding pile shuts down discharge process.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (10)
1. flow battery system high/low temperature shuts down a self-protection method, and described flow battery system comprises at least one pile, positive pole storage tank, negative pole storage tank and circulating pump, it is characterized in that described method comprises the steps:
Step 1: judge whether flow battery system receives halt instruction or be in stopped status, is, performs step 2, otherwise continue to perform step 1;
Step 2: monitoring of environmental temperature T;
Step 3: judge that whether ambient temperature T is higher than equaling the first temperature threshold or lower than equaling the second temperature threshold, being perform step 4, otherwise returning step 2;
Step 4: monitor the electrolyte state-of-charge in positive pole storage tank and negative pole storage tank;
Step 5: environmentally temperature T determines the normal range (NR) of the electrolyte state-of-charge in positive pole storage tank or negative pole storage tank;
Step 6: judge whether the electrolyte state-of-charge in positive pole storage tank or negative pole storage tank is in each self-corresponding normal range (NR), is return step 2, otherwise perform step 7;
Step 7: reduce the electrolyte state-of-charge in positive pole storage tank and/or the electrolyte state-of-charge in negative pole storage tank.
2. flow battery system high/low temperature according to claim 1 shuts down self-protection method, it is characterized in that described step 7 is specially:
Electrolyte in electrolyte in positive pole storage tank and negative pole storage tank is delivered in a mixing storage tank and mixes;
Mixed electrolyte is returned and is delivered to positive pole storage tank and negative pole storage tank.
3. flow battery system high/low temperature according to claim 1 shuts down self-protection method, it is characterized in that described step 7 is specially:
Be communicated with positive pole storage tank and negative pole storage tank;
Electrolyte in positive pole storage tank is delivered to negative pole storage tank, and/or the electrolyte in negative pole storage tank is delivered to positive pole storage tank.
4. flow battery system high/low temperature according to claim 1 shuts down self-protection method, it is characterized in that described step 7 is specially:
Additive is applied in positive pole storage tank and/or negative pole storage tank.
5. flow battery system high/low temperature according to claim 1 shuts down self-protection method, it is characterized in that described step 4 is specially:
When ambient temperature T is higher than when equaling the first temperature threshold, the electrolyte state-of-charge in monitoring positive pole storage tank;
When ambient temperature T is lower than when equaling the second temperature threshold, the electrolyte state-of-charge in monitoring negative pole storage tank.
6. flow battery system high/low temperature shuts down a self-protecting device, and described flow battery system comprises at least one pile, positive pole storage tank, negative pole storage tank and circulating pump, it is characterized in that described device comprises:
For judging whether flow battery system receives halt instruction or be in the self-shield judge module of stopped status;
Connect described self-shield judge module, for receive when flow battery system halt instruction or flow battery system shut down after the temperature monitoring module of monitoring of environmental temperature T;
Connect temperature monitoring module, for judging ambient temperature T whether higher than equaling the first temperature threshold or lower than the temperature judge module equaling the second temperature threshold;
Connect temperature judge module, for when ambient temperature T is higher than when equaling the first temperature threshold, monitor the monitoring modular I of the electrolyte state-of-charge in positive pole storage tank;
Connect temperature judge module, for when ambient temperature T is lower than when equaling the second temperature threshold, monitor the monitoring modular II of the electrolyte state-of-charge in negative pole storage tank;
Connect temperature monitoring module, determine the acquisition module of the normal range (NR) of the electrolyte state-of-charge in positive pole storage tank or negative pole storage tank for environmentally temperature T;
Connect monitoring modular I, monitoring modular II and acquisition module, whether the electrolyte state-of-charge for judging in positive pole storage tank or negative pole storage tank is in the state-of-charge judge module in each self-corresponding normal range (NR);
Connect state-of-charge judge module, for not being in the normal range (NR) of its correspondence when the electrolyte state-of-charge in positive pole storage tank, or when the electrolyte state-of-charge in negative pole storage tank is not in the normal range (NR) of its correspondence, controls flow battery system and carry out the control module that electrolyte state-of-charge reduces operation.
7. flow battery system high/low temperature according to claim 6 shuts down self-protecting device, it is characterized in that described device also comprises:
Connect described positive pole storage tank and negative pole storage tank, for the mixing storage tank carrying the electrolyte of coming to mix to positive pole storage tank and negative pole storage tank; In described mixing storage tank, mixed electrolyte returns and is delivered to positive pole storage tank and negative pole storage tank;
Be placed between positive pole storage tank and mixing storage tank and the transfer pipeline be placed between negative pole storage tank and mixing storage tank;
For the electrolyte in positive pole storage tank and negative pole storage tank being delivered to respectively the delivery pump of described mixing storage tank; When the electrolyte state-of-charge in positive pole storage tank is not in the normal range (NR) of its correspondence, or when the electrolyte state-of-charge in negative pole storage tank is not in the normal range (NR) of its correspondence, described control module controls described transfer pipeline and connects and the unlatching of described delivery pump; When the electrolyte state-of-charge in positive pole storage tank is in the normal range (NR) of its correspondence, or when the electrolyte state-of-charge in negative pole storage tank is in the normal range (NR) of its correspondence, described control module controls described transfer pipeline and disconnects and the closedown of described delivery pump.
8. flow battery system high/low temperature according to claim 7 shuts down self-protecting device, it is characterized in that the volume of described mixing storage tank is 10% ~ 30% of positive pole flask volume or negative pole flask volume; Described delivery pump rated power is 10% ~ 50% of described circulating pump rated power.
9. flow battery system high/low temperature according to claim 6 shuts down self-protecting device, it is characterized in that described device also comprises:
Be arranged on the connecting pipeline between positive pole storage tank and negative pole storage tank; The electrolyte state-of-charge that described control module is worked as in positive pole storage tank is not in the normal range (NR) of its correspondence, or when the electrolyte state-of-charge in negative pole storage tank is not in the normal range (NR) of its correspondence, controls described connecting pipeline and connect.
10. flow battery system high/low temperature according to claim 6 shuts down self-protecting device, it is characterized in that described device also comprises:
According to the electrolyte state-of-charge in positive pole storage tank and negative pole storage tank, calculate the computing module of institute's expense additive;
The interpolation module of described additive is applied in positive pole storage tank and/or negative pole storage tank; The electrolyte state-of-charge that described control module is worked as in positive pole storage tank is not in the normal range (NR) of its correspondence, or when the electrolyte state-of-charge in negative pole storage tank is not in the normal range (NR) of its correspondence, control described computing module and carry out institute's expense additive calculating operation, and control described interpolation module carry out described consumption additive add operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510203230.2A CN104882620B (en) | 2015-04-24 | 2015-04-24 | Method and device for realizing self protection on high-low temperature halt of flow battery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510203230.2A CN104882620B (en) | 2015-04-24 | 2015-04-24 | Method and device for realizing self protection on high-low temperature halt of flow battery system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104882620A true CN104882620A (en) | 2015-09-02 |
| CN104882620B CN104882620B (en) | 2017-04-26 |
Family
ID=53950019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510203230.2A Active CN104882620B (en) | 2015-04-24 | 2015-04-24 | Method and device for realizing self protection on high-low temperature halt of flow battery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104882620B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017156681A1 (en) * | 2016-03-14 | 2017-09-21 | 大连融科储能技术发展有限公司 | Electrolyte storage tank, flow cell, box-type flow cell system and flow cell charge-discharge control method |
| CN109346756A (en) * | 2018-11-26 | 2019-02-15 | 上海电气集团股份有限公司 | A kind of flow battery system and its regeneration of electrolyte method of regeneration of electrolyte |
| CN111509278A (en) * | 2020-03-20 | 2020-08-07 | 香港科技大学 | Method for recovering capacity and efficiency of all-vanadium redox flow battery on line |
| EP3602664A4 (en) * | 2017-03-27 | 2021-01-20 | D'Anzi, Angelo | An advanced electrolyte mixing method for all vanadium flow batteries |
| CN112531192A (en) * | 2021-02-01 | 2021-03-19 | 深圳市寒暑科技新能源有限公司 | Zinc-manganese single flow battery |
| WO2023125673A1 (en) * | 2021-12-31 | 2023-07-06 | 寰泰储能科技股份有限公司 | Shutdown protection system and method for liquid flow energy storage system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050158614A1 (en) * | 2004-01-15 | 2005-07-21 | Hennessy Timothy D.J. | System and method for optimizing efficiency and power output from a vanadium redox battery energy storage system |
| CN102354761A (en) * | 2011-10-10 | 2012-02-15 | 中国东方电气集团有限公司 | Redox flow cell system and shutdown protection method as well as device thereof |
| CN102420333A (en) * | 2011-11-14 | 2012-04-18 | 中国东方电气集团有限公司 | Control method, apparatus and system for redox flow batteries |
| CN103199285A (en) * | 2013-04-10 | 2013-07-10 | 大连融科储能技术发展有限公司 | Liquid flow battery halt protection method and liquid flow battery system |
-
2015
- 2015-04-24 CN CN201510203230.2A patent/CN104882620B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050158614A1 (en) * | 2004-01-15 | 2005-07-21 | Hennessy Timothy D.J. | System and method for optimizing efficiency and power output from a vanadium redox battery energy storage system |
| CN102354761A (en) * | 2011-10-10 | 2012-02-15 | 中国东方电气集团有限公司 | Redox flow cell system and shutdown protection method as well as device thereof |
| CN102420333A (en) * | 2011-11-14 | 2012-04-18 | 中国东方电气集团有限公司 | Control method, apparatus and system for redox flow batteries |
| CN103199285A (en) * | 2013-04-10 | 2013-07-10 | 大连融科储能技术发展有限公司 | Liquid flow battery halt protection method and liquid flow battery system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017156681A1 (en) * | 2016-03-14 | 2017-09-21 | 大连融科储能技术发展有限公司 | Electrolyte storage tank, flow cell, box-type flow cell system and flow cell charge-discharge control method |
| US10991960B2 (en) | 2016-03-14 | 2021-04-27 | Dalian Rongkepower Co., Ltd | Electrolyte storage tank, flow battery, box-type flow battery system and charge-discharge control method of flow battery |
| EP3602664A4 (en) * | 2017-03-27 | 2021-01-20 | D'Anzi, Angelo | An advanced electrolyte mixing method for all vanadium flow batteries |
| CN109346756A (en) * | 2018-11-26 | 2019-02-15 | 上海电气集团股份有限公司 | A kind of flow battery system and its regeneration of electrolyte method of regeneration of electrolyte |
| CN111509278A (en) * | 2020-03-20 | 2020-08-07 | 香港科技大学 | Method for recovering capacity and efficiency of all-vanadium redox flow battery on line |
| CN111509278B (en) * | 2020-03-20 | 2023-03-17 | 香港科技大学 | Method for recovering capacity and efficiency of all-vanadium redox flow battery on line |
| CN112531192A (en) * | 2021-02-01 | 2021-03-19 | 深圳市寒暑科技新能源有限公司 | Zinc-manganese single flow battery |
| WO2023125673A1 (en) * | 2021-12-31 | 2023-07-06 | 寰泰储能科技股份有限公司 | Shutdown protection system and method for liquid flow energy storage system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104882620B (en) | 2017-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11626605B2 (en) | Flow battery control method, flow battery control system and flow battery | |
| CN104882620A (en) | Method and device for realizing self protection on high-low temperature halt of flow battery system | |
| US11597290B2 (en) | Flow battery-based charging systems | |
| Price et al. | A novel approach to utility-scale energy storage | |
| US7181183B1 (en) | Telecommunication system incorporating a vanadium redox battery energy storage system | |
| CN103199285B (en) | A kind of flow battery halt protection method and flow battery system | |
| CN103928697B (en) | A kind of flow battery system with emergency power supply function | |
| CN102867977B (en) | All-vanadium redox flow energy storage battery system and subsystem power consistency adjustment method thereof | |
| CN219372030U (en) | Shutdown control system for flow battery | |
| CN102354761A (en) | Redox flow cell system and shutdown protection method as well as device thereof | |
| WO2017156680A1 (en) | Flow battery regulation and control method, regulation and control system thereof, and flow battery | |
| CN104795584A (en) | Method and device for realizing low-temperature quick start of flow cell system and flow cell system | |
| Miyake et al. | Vanadium redox-flow battery for a variety of applications | |
| CN102290849A (en) | Power-supply system and control device thereof | |
| Yano et al. | Development and demonstration of redox flow battery system | |
| CN109599935A (en) | Light hydrogen energy-storage power supplying apparatus and its method of supplying power to | |
| CN105702994B (en) | A kind of flow battery system structure | |
| CN104393626A (en) | Distributed solid oxide fuel cell charging station | |
| CN103825042B (en) | For the flow battery system from net type solar power system | |
| CN105186602A (en) | Power supply system output controlling method, device and system | |
| Li et al. | Long term performance evaluation of a commercial vanadium flow battery system | |
| CN209313514U (en) | Light hydrogen energy-storage power supplying apparatus | |
| CN113964359A (en) | Energy storage system and energy storage method for organic flow battery and all-vanadium flow battery in complementation mode | |
| Ceraolo et al. | Redox-flow batteries for high energy-to-power ratio storage: a preliminary experimental study | |
| CN216250822U (en) | Energy storage system with organic flow battery and all-vanadium flow battery being complementary |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |