CN114220986A - Electric pile structure, flow battery temperature regulating system and control method thereof - Google Patents
Electric pile structure, flow battery temperature regulating system and control method thereof Download PDFInfo
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- CN114220986A CN114220986A CN202210154254.3A CN202210154254A CN114220986A CN 114220986 A CN114220986 A CN 114220986A CN 202210154254 A CN202210154254 A CN 202210154254A CN 114220986 A CN114220986 A CN 114220986A
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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
- H01M8/04029—Heat exchange using liquids
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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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
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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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
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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
- H01M8/04298—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
- H01M8/04701—Temperature
- H01M8/04723—Temperature of the coolant
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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
- H01M8/18—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
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Abstract
The invention discloses a galvanic pile structure, a redox flow battery temperature regulating system and a control method thereof, and relates to the technical field of chemical energy storage battery manufacturing. The electric pile structure comprises a plurality of battery units which are connected in series, each battery unit comprises a bipolar plate, the surface of each bipolar plate is respectively provided with a first flow field and a second flow field which are not communicated with each other, electrolyte can flow on the first flow field, heat exchange liquid can flow on the second flow field, and the temperature of the electrolyte is adjusted by changing the temperature of the heat exchange liquid. According to the electric pile structure, the flow field which enables heat exchange liquid to flow is directly arranged on the bipolar plate, so that the temperature of electrolyte in the electric pile structure is adjusted, meanwhile, the increase of the size and complexity of the whole flow battery system is avoided, and the cost and the maintenance cost of the whole flow battery system are further reduced.
Description
Technical Field
The invention relates to the technical field of chemical energy storage battery manufacturing, in particular to a galvanic pile structure, a flow battery temperature regulating system and a control method thereof.
Background
The flow battery is an energy storage technology which realizes energy storage and release through the chemical change of electrolyte. Flow battery systems typically consist of a stack of multiple cells connected in series and corresponding positive and negative electrolyte tanks. Because the flow battery generates mutual conversion of electric energy and chemical energy in the charging and discharging process, certain heat can be generated in the galvanic pile, the heat is taken away by electrolyte flowing through the galvanic pile, but the temperature of the electrolyte can be integrally increased when the flow battery runs for a long time. When the temperature in the galvanic pile exceeds the upper limit of the temperature of the electrolyte, the solid of the electrolyte is separated out, and the normal operation of the flow battery system is seriously influenced; when the flow battery is applied to regions such as severe cold regions, the temperature of the electrolyte may be lower than the lower temperature limit, and a solid may be precipitated, so that the charge and discharge performance of the flow battery is affected.
In the prior art, in order to control the temperature of the electrolyte, a heat exchanger is usually added in a liquid storage tank or a pipeline between the liquid storage tank and the electric pile, and the temperature of the electrolyte is changed by adjusting the heat exchange amount of the heat exchanger. However, since the flow battery system is complex, adding a heat exchanger inside the liquid storage tank or in the pipeline between the liquid storage tank and the electric pile not only increases the flow resistance of the electrolyte, but also further increases the volume and complexity of the whole flow battery system.
Disclosure of Invention
The first objective of the present invention is to provide an electric pile structure, in which a flow field enabling a heat exchange fluid to flow is directly disposed on a bipolar plate, so as to adjust the temperature of an electrolyte in the electric pile structure while avoiding increasing the volume and complexity of the whole flow battery system, thereby reducing the cost and maintenance cost of the whole flow battery system.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
the utility model provides a galvanic pile structure, the galvanic pile structure includes a plurality of battery cell of establishing ties each other, the battery cell includes bipolar plate, the surface of bipolar plate is provided with first flow field and second flow field that do not communicate each other respectively, and electrolyte can flow in first flow field, and heat exchange liquid can flow in the second flow field, through changing the heat exchange liquid temperature adjusts the electrolyte temperature.
As an alternative to the stack structure, the bipolar plate is provided with the first flow field and the second flow field on two opposite surfaces, respectively.
The invention has the beneficial effects that: the invention provides a galvanic pile structure, which is characterized in that a first flow field and a second flow field which respectively allow electrolyte and heat exchange liquid to flow are arranged on a bipolar plate, so that the heat exchange liquid can directly flow in the bipolar plate in a circulating way to change the temperature of the flowing electrolyte in the galvanic pile structure in real time. In addition, because the flow field which can enable the heat exchange liquid to flow is directly arranged on the bipolar plate, compared with the prior art that the heat exchanger is additionally arranged in a pipeline between the liquid storage tank and the electric pile, the flow resistance of the electrolyte is not increased, the size and the complexity of the whole flow battery system are not required to be increased, and the cost and the maintenance cost of the whole flow battery system are further reduced.
The second objective of the present invention is to provide a flow battery temperature adjustment system, which can adjust the temperature of the electrolyte in the stack structure while avoiding increasing the volume and complexity of the whole flow battery system, thereby reducing the cost and maintenance cost of the whole flow battery system.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
a flow battery attemperation system comprising a stack structure as described above, the flow battery attemperation system further comprising:
a storage tank for containing the heat exchange fluid, wherein the storage tank is communicated with the electric pile structure through a pipeline, and the heat exchange fluid can flow into the electric pile structure from the storage tank and flow back into the storage tank;
the temperature detection module is connected with the electric pile structure and is used for respectively detecting the temperature of the electrolyte flowing into and out of the electric pile structure;
an adjustment module disposed in the conduit for adjusting a temperature of the heat exchange fluid flowing into the stack structure;
and the control module is electrically connected with the adjusting module and the temperature detection module respectively.
As an alternative to the flow battery temperature adjustment system, the adjustment module includes a heating unit and a cooling unit, the heating unit and the cooling unit are disposed on the storage tank and connected to the control module, the heating unit is configured to heat the heat-exchange fluid in the storage tank, and the cooling unit is configured to cool the heat-exchange fluid in the storage tank.
As an alternative of the flow battery temperature regulating system, the flow battery temperature regulating system further includes a flow control pump disposed in the pipeline and electrically connected to the control module to regulate a flow rate of the heat exchange fluid flowing into the storage tank.
As an alternative to the flow battery temperature adjustment system, the flow battery temperature adjustment system further includes a control valve provided in the pipe for controlling a flow rate of the heat exchange liquid in the pipe.
As an alternative of the flow battery temperature regulating system, the flow battery temperature regulating system further comprises a positive electrolyte storage tank and a negative electrolyte storage tank, and the galvanic pile structure is respectively connected with the positive electrolyte storage tank and the negative electrolyte storage tank through pipelines.
The invention has the beneficial effects that: the invention provides a flow battery temperature regulating system, which is characterized in that the temperature of electrolyte flowing into and out of a galvanic pile structure is obtained through a temperature detection module by applying the galvanic pile structure, so that the temperature of heat exchange liquid in the galvanic pile structure is obtained, when the temperature of the heat exchange liquid in the galvanic pile structure is higher than a preset temperature, the situation that the heat generated by chemical reaction of the electrolyte in the galvanic pile structure is excessive at the moment is required to be reduced is shown, and therefore, the control module controls the regulating module to cool the heat exchange liquid, so that the interior of the galvanic pile structure can be rapidly cooled when the heat exchange liquid flows into the galvanic pile structure; when the temperature of the heat exchange liquid in the galvanic pile structure is lower than the preset temperature, it is indicated that the heat generated by the chemical reaction generated by the electrolyte in the galvanic pile structure at the moment is too low, the temperature in the galvanic pile structure needs to be increased, thereby the heat exchange liquid is heated by the control module control and adjustment module, so that the heat exchange liquid can be rapidly heated when flowing into the galvanic pile structure, and further the temperature of the electrolyte in the galvanic pile structure during the chemical reaction is always in a proper state, the charging and discharging performance of the flow battery is ensured, and the service life of the flow battery is prolonged as far as possible, and the sensitivity and the timeliness for adjusting the temperature of the electrolyte are improved.
The third purpose of the present invention is to provide a control method for a flow battery temperature regulation system, which can adjust the temperature of the electrolyte in the stack structure and avoid increasing the volume and complexity of the whole flow battery system, thereby reducing the cost and maintenance cost of the whole flow battery system.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
a control method of a flow battery temperature regulation system comprises the following steps:
acquiring the temperature of electrolyte flowing into and out of the galvanic pile structure to obtain the temperature of heat exchange liquid in the galvanic pile structure;
when the temperature of the heat exchange liquid in the electric pile structure is judged to be higher than the preset temperature, the control and regulation module is used for cooling the heat exchange liquid flowing into the electric pile structure;
and when the temperature of the heat exchange liquid in the galvanic pile structure is judged to be lower than the preset temperature, the control and regulation module is used for heating the heat exchange liquid flowing into the galvanic pile structure.
An alternative to a control method of a flow battery attemperation system, the control method of a flow battery attemperation system further comprising:
the flow of the heat exchange liquid flowing into the storage tank is adjusted by adjusting the rotating speed of the flow control pump.
An alternative to a control method of a flow battery attemperation system, the control method of a flow battery attemperation system further comprising:
the flow rate of the heat exchange liquid in the pipeline is regulated by a control valve.
The invention has the beneficial effects that: the invention provides a control method of a flow battery temperature regulation system, which comprises the steps of obtaining the temperature of electrolyte flowing into and out of a galvanic pile structure, obtaining the temperature of heat exchange liquid in the galvanic pile structure, and when the temperature of the heat exchange liquid in the galvanic pile structure is higher than a preset temperature, indicating that the heat generated by chemical reaction of the electrolyte in the galvanic pile structure is excessive at the moment and the temperature in the galvanic pile structure needs to be reduced, so that the heat exchange liquid is cooled through a regulation module, and the interior of the galvanic pile structure can be rapidly cooled when the heat exchange liquid flows into the galvanic pile structure; when the temperature of the heat exchange liquid in the galvanic pile structure is lower than the preset temperature, it is described that the heat generated by the chemical reaction generated by the electrolyte in the galvanic pile structure at the moment is too low, the temperature in the galvanic pile structure needs to be improved, thereby the heat exchange liquid is heated through the adjusting module, so that the heat exchange liquid can be rapidly heated to the galvanic pile structure when flowing into the galvanic pile structure, and further the temperature of the electrolyte in the galvanic pile structure during the chemical reaction is always in a proper state, the charging and discharging performance of the flow battery is ensured, and the service life of the flow battery is prolonged as far as possible, and the sensitivity and the timeliness for adjusting the temperature of the electrolyte are improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic structural diagram of a stack structure provided in an embodiment of the present invention;
FIG. 2 is a schematic view of a bipolar plate having a first flow field according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a bipolar plate having a second flow field according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a flow battery temperature regulating system according to an embodiment of the invention;
fig. 5 is a flowchart of a control method of a flow battery temperature regulation system according to an embodiment of the present invention.
Reference numerals:
1. a stack structure; 11. a battery cell; 111. a bipolar plate; 1111. a first flow field; 1112. a second flow field; 1113. a first liquid supply port; 1114. a first drain port; 1115. a second liquid supply port; 1116. a second liquid discharge port; 12. an end plate;
2. a storage box; 3. a pipeline; 4. a temperature detection module; 5. an adjustment module; 51. a heating unit; 52. a cooling unit; 6. a control module; 7. a flow control pump; 8. and (4) controlling the valve.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning. Wherein the terms "first position" and "second position" are two different positions.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1 to 3, the present embodiment provides a stack structure 1, the stack structure 1 includes a plurality of battery cells 11 connected in series, each battery cell 11 includes a bipolar plate 111, a first flow field 1111 and a second flow field 1112 that are not connected to each other are respectively disposed on a surface of the bipolar plate 111, an electrolyte can flow on the first flow field 1111, a heat exchange liquid can flow on the second flow field 1112, and a temperature of the electrolyte can be adjusted by changing a temperature of the heat exchange liquid.
Wherein, through set up first class of field 1111 and the second class of field 1112 that lets electrolyte and heat exchange fluid flow respectively on bipolar plate 111 to make the heat exchange fluid can directly flow at bipolar plate 111 inner loop and then change the electrolyte temperature of the flow in cell stack structure 1 in real time, because electrolyte carries out the interconversion of electric energy and chemical energy in cell stack structure 1, compare in prior art and set up the heat exchanger in the liquid storage pot that holds electrolyte, directly change the electrolyte temperature in cell stack structure 1 and can guarantee sensitivity and the timeliness to electrolyte temperature control. In addition, because the flow field which enables the heat exchange liquid to flow is directly arranged on the bipolar plate 111, compared with the prior art that the heat exchanger is added in a pipeline between the liquid storage tank and the electric pile, the flow resistance of the electrolyte is not increased, the volume and the complexity of the whole flow battery system are not required to be increased, and the cost and the maintenance cost of the whole flow battery system are further reduced.
In this embodiment, the first flow field 1111 and the second flow field 1112 are respectively disposed on two opposite surfaces of the bipolar plate 111, so that the first flow field 1111 and the second flow field 1112 are not communicated with each other, and the area of the heat exchange fluid and the electrolyte for performing the heat exchange is as large as possible, thereby ensuring that the temperature of the electrolyte in the cell stack structure 1 can be adjusted sufficiently and uniformly.
In this embodiment, the heat exchange fluid is an antifreeze, so as to prevent the heat exchange fluid from being solidified and unable to flow when the cell stack structure 1 is applied to a severe cold region. Illustratively, the heat exchange fluid is deionized water or ethylene glycol, which has the advantages of easy availability, low cost, and no chemical reaction with the electrolyte.
The first flow field 1111 and the second flow field 1112 can be directly processed on the bipolar plate 111 by machine carving, stamping, mould pressing or the like, so that large-scale industrial production can be performed, the processing is convenient, and the cost is low.
Preferably, the bipolar plate 111 is made of a graphite material, which has the advantages of high electrical conductivity and high thermal conductivity, and can improve the charge and discharge efficiency and the sensitivity of electrolyte temperature adjustment in the stack structure 1.
The bipolar plate 111 is further provided with a first liquid supply port 1113, a first drain port 1114, a second liquid supply port 1115 and a second drain port 1116, and the first flow field 1111 is respectively communicated with the first liquid supply port 1113 and the first drain port 1114; the second flow field 1112 is connected to a second liquid supply port 1115 and a second liquid discharge port 1116, respectively. That is, the electrolyte in the storage tank flows into the first flow field 1111 from the first liquid supply port 1113 and flows back to the storage tank from the first liquid discharge port 1114, and the heat-exchange liquid in the storage tank 2 flows into the second flow field 1112 from the second liquid supply port 1115 and flows back into the storage tank 2 from the second liquid discharge port 1116, thereby ensuring that the electrolyte and the heat-exchange liquid can continuously flow in the stack structure 1.
Wherein, the stack structure 1 further comprises two end plates 12, the plurality of battery units 11 are arranged between the two end plates 12, and the two end plates 12 are used for fixedly pressing the plurality of battery units 11 which are laminated together. Namely, the electrolyte in the storage tank and the heat exchange liquid in the storage tank 2 enter from the end plate 12 and are distributed into the respective first flow field 1111 and second flow field 1112, and then flow out from the other end plate 12 and flow back into the storage tank and storage tank 2,
in order to realize real-time temperature regulation of the electrolyte in the electric pile structure 1, the embodiment further provides a flow battery temperature regulation system, as shown in fig. 4, the flow battery temperature regulation system comprises, in addition to the electric pile structure 1, a storage tank 2, a temperature detection module 4, a regulation module 5 and a control module 6, wherein the storage tank 2 is used for containing a heat exchange fluid, the storage tank 2 is communicated with the electric pile structure 1 through a pipeline 3, and the heat exchange fluid can flow into the electric pile structure 1 from the storage tank 2 and flow back into the storage tank 2; the temperature detection module 4 is connected with the electric pile structure 1 and is used for respectively detecting the temperature of the electrolyte flowing into and out of the electric pile structure 1; the adjusting module 5 is arranged in the pipeline 3, and the adjusting module 5 is used for adjusting the temperature of the heat exchange liquid flowing into the pile structure 1; the control module 6 is electrically connected with the regulating module 5 and the temperature detecting module 4 respectively.
Specifically, the temperature of the electrolyte flowing into and out of the cell stack structure 1 is obtained through the temperature detection module 4, so as to obtain the temperature of the heat exchange liquid in the cell stack structure 1, and when the temperature of the heat exchange liquid in the cell stack structure 1 is higher than a preset temperature, it is indicated that the heat generated by the chemical reaction generated by the electrolyte in the cell stack structure 1 is excessive at the moment, and the temperature in the cell stack structure 1 needs to be reduced, so that the control module 6 controls the adjustment module 5 to cool the heat exchange liquid, and the heat exchange liquid can be rapidly cooled in the cell stack structure 1 when flowing into the cell stack structure 1; when the temperature of the heat exchange liquid in the electric pile structure 1 is lower than the preset temperature, it is indicated that the heat generated by the chemical reaction of the electrolyte in the electric pile structure 1 at the moment is too low, the temperature in the electric pile structure 1 needs to be increased, thereby the heat exchange liquid is heated by the control module 6 controlling the adjusting module 5, so that the heat exchange liquid can be rapidly heated when flowing into the electric pile structure 1, and further the temperature of the electrolyte in the electric pile structure 1 during the chemical reaction is always in a proper state, the charging and discharging performance of the flow battery is ensured, and the service life of the flow battery is prolonged as far as possible, and the sensitivity and timeliness for adjusting the temperature of the electrolyte are improved.
It should be explained that the arrows in fig. 4 refer to the flow direction of the heat exchange fluid in the pipe 3.
Wherein, in order to realize that can quick adjustment heat-exchange liquid temperature, adjusting module 5 includes heating unit 51 and cooling unit 52, and heating unit 51 and cooling unit 52 set up on storage box 2 and are connected with control module 6, and heating unit 51 is used for heating the heat-exchange liquid in storage box 2, and cooling unit 52 is used for cooling the heat-exchange liquid in storage box 2. In this embodiment, the heating unit 51 is a heater disposed in the storage box 2, and the cooling unit 52 is a fan disposed outside the storage box 2, that is, the heat exchange fluid is cooled by air.
In this embodiment, the temperature of the electrolyte flowing into and out of the electric pile structure 1 is monitored in real time, and when the temperature is too high, the cooling unit 52 is controlled to cool the heat exchange liquid, so as to cool and exchange the electrolyte in the electric pile structure 1; when the temperature crosses lowly then control heating unit 51 heats heat exchange liquid, thereby heat transfer heaies up the electrolyte in the galvanic pile structure 1, thereby avoid the electrolyte in the galvanic pile structure 1 the too high condition of appearing the temperature and appearing and separate out and the crystallization is crossed to the low temperature condition takes place, realized controlling the electrolyte temperature in the galvanic pile structure 1 in the target temperature range that suits all the time, thereby ensured the security and the stability that carry out the charge-discharge in the galvanic pile structure 1, can ensure that the galvanic pile structure 1 can uninterruptedly charge-discharge.
Further, the redox flow battery temperature regulating system further comprises a flow control pump 7, wherein the flow control pump 7 is arranged in the pipeline 3 and electrically connected with the control module 6 to regulate the flow of the heat exchange liquid flowing into the storage tank 2, namely, the rotating speed of the control pump is regulated according to the temperature of the heat exchange liquid flowing out of the galvanic pile structure 1, so that the control module 6 controls the flow of the heat exchange liquid flowing into the storage tank 2 to be dynamically regulated through the flow control pump 7, the power waste of the whole redox flow battery temperature regulating system is avoided, and the energy consumption of the whole redox flow battery temperature regulating system is reduced as far as possible. The pump 7 is a common knowledge in the art, and therefore, the pump 7 is not specifically described herein.
In this embodiment, the flow cell temperature regulating system further includes a control valve 8, and the control valve 8 is disposed in the pipe 3 and is used for controlling the flow rate of the heat exchange liquid in the pipe 3. Namely, the flow velocity of the heat exchange liquid can be controlled to influence the heat exchange effect between the electrolyte and the heat exchange liquid in the galvanic pile structure 1.
Wherein, in order to realize the interconversion of electric energy and chemical energy in the pile structure 1, electrolyte divide into anodal electrolyte and negative pole electrolyte, and on the same way, the storage tank also divide into anodal electrolyte storage tank and negative pole electrolyte storage tank. The redox flow battery temperature regulating system also comprises a positive electrolyte storage tank and a negative electrolyte storage tank, and the pile structure 1 is respectively connected with the positive electrolyte storage tank and the negative electrolyte storage tank through pipelines.
The embodiment also provides a control method of the flow battery temperature regulating system, which is realized by adopting the flow battery temperature regulating system.
As shown in fig. 5, the control method of the flow battery temperature regulation system of the present embodiment includes:
acquiring the temperature of electrolyte flowing into and out of the galvanic pile structure 1 to obtain the temperature of heat exchange liquid in the galvanic pile structure 1;
when the temperature of the heat exchange liquid in the electric pile structure 1 is judged to be higher than the preset temperature, the control and regulation module 5 is used for cooling the heat exchange liquid flowing into the electric pile structure 1;
when the temperature of the heat exchange liquid in the galvanic pile structure 1 is judged to be lower than the preset temperature, the control and regulation module 5 heats the heat exchange liquid flowing into the galvanic pile structure 1. By acquiring the temperature of the electrolyte flowing into and out of the cell stack structure 1, the temperature of the heat exchange liquid in the cell stack structure 1 is obtained, and when the temperature of the heat exchange liquid in the cell stack structure 1 is higher than a preset temperature, it is indicated that the heat generated by the chemical reaction generated by the electrolyte in the cell stack structure 1 is excessive at the moment, and the temperature in the cell stack structure 1 needs to be reduced, so that the heat exchange liquid is cooled by the adjusting module 5, and the interior of the cell stack structure 1 can be rapidly cooled when the heat exchange liquid flows into the cell stack structure 1; when the temperature of the heat exchange liquid in the galvanic pile structure 1 is lower than the preset temperature, it is described that the heat generated by the chemical reaction of the electrolyte in the galvanic pile structure 1 at the moment is too low, the temperature in the galvanic pile structure 1 needs to be increased, thereby the heat exchange liquid is heated through the adjusting module 5, so that the heat exchange liquid can be rapidly heated up to the galvanic pile structure 1 when flowing into the galvanic pile structure 1, and further the temperature of the electrolyte in the galvanic pile structure 1 during the chemical reaction is always in a proper state, the charging and discharging performance of the flow battery is ensured, and the service life of the flow battery is prolonged as far as possible, and the sensitivity and the timeliness for adjusting the temperature of the electrolyte are improved.
It should be explained that the temperature detection module 4 acquires data related to the temperature of the electrolyte flowing into and out of the stack structure 1 and uploads the data to the control module 6, the control module 6 calculates a temperature difference based on the temperature of the electrolyte flowing into the stack structure 1 and the temperature of the electrolyte flowing out of the stack structure 1, the temperature of the heat exchange liquid in the stack structure 1, which exchanges heat with the electrolyte, can be calculated through the temperature difference, and then the control module 6 determines whether the temperature of the heat exchange liquid in the stack structure 1 is higher or lower than the preset temperature, and then the regulating module 5 is controlled to heat or cool the heat exchange liquid which is to flow into the electric pile structure 1 later so as to ensure that the temperature in the electric pile structure 1 is always in a proper temperature range, therefore, the safety and the stability of the flow battery are guaranteed, and the flow battery can operate uninterruptedly all day long.
In this embodiment, "when judging that the temperature of the heat exchange liquid in the cell stack structure 1 is higher than the preset temperature, control regulating module 5 cools the heat exchange liquid flowing into the cell stack structure 1" and "when judging that the temperature of the heat exchange liquid in the cell stack structure 1 is lower than the preset temperature, control regulating module 5 heats the heat exchange liquid flowing into the cell stack structure 1" specifically include the following steps:
the control module 6 judges whether the temperature of the heat exchange liquid in the galvanic pile structure 1 is higher than a preset temperature or not;
if so, controlling the regulating module 5 to cool the heat exchange liquid flowing into the electric pile structure 1;
if not, judging that the temperature of the heat exchange liquid in the galvanic pile structure 1 is lower than the preset temperature;
if yes, the control and regulation module 5 heats the heat exchange liquid flowing into the electric pile structure 1.
It should be explained that, when the temperature of the heat exchange liquid in the electric pile structure 1 is equal to the preset temperature, it indicates that the temperature of the electrolyte in the electric pile structure 1 is in the suitable temperature range at this time, that is, the temperature in the electric pile structure 1 is the optimal working temperature, and the temperature adjustment of the heat exchange liquid is not needed.
Wherein, because the adjusting module 5 includes the cooling unit 52 and the heating unit 51, the step of controlling the adjusting module 5 to cool the heat-exchange fluid flowing into the stack structure 1 specifically includes: the heat exchange fluid in the storage tank 2 is cooled by the cooling unit 52. The step of controlling the regulating module 5 to heat the heat exchange liquid flowing into the electric pile structure 1 specifically comprises the following steps: the heat-exchange fluid in the storage tank 2 is heated by the heating unit 51.
Preferably, the control method of the flow battery temperature regulation system further comprises the following steps: the flow rate of the heat exchange fluid flowing into the storage tank 2 is adjusted by adjusting the rotation speed of the flow control pump 7. That is, after the heat exchange fluid in the storage tank 2 is heated or cooled by the adjusting module 5, the control module 6 can also dynamically adjust the rotation speed of the flow control pump 7 to adjust the flow rate of the heat exchange fluid flowing into the storage tank 2, so as to dynamically adjust the temperature of the electrolyte in the cell stack more accurately. Meanwhile, the power waste of the whole flow battery temperature regulating system can be avoided, and the energy consumption is reduced.
Further, the control method of the flow battery temperature regulation system further comprises the following steps: the flow rate of the heat exchange fluid in the conduit 3 is regulated by means of a control valve 8. That is, in the process of flowing the heat exchange liquid in the pipeline 3, the flow rate of the heat exchange liquid is controlled to influence the heat exchange effect between the electrolyte in the cell stack structure 1 and the heat exchange liquid, so that the charging and discharging efficiency in the cell stack structure 1 and the sensitivity of electrolyte temperature adjustment are further improved.
In the description herein, references to the description of "some embodiments," "other embodiments," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (10)
1. A galvanic stack structure comprising a plurality of cells (11) connected in series with each other, characterized in that the cells (11) comprise a bipolar plate (111), the surface of the bipolar plate (111) is respectively provided with a first flow field (1111) and a second flow field (1112) which are not communicated with each other, an electrolyte can flow on the first flow field (1111), a heat exchange fluid can flow on the second flow field (1112), and the temperature of the electrolyte is adjusted by changing the temperature of the heat exchange fluid.
2. The stack structure according to claim 1, characterized in that the bipolar plate (111) is provided with the first flow field (1111) and the second flow field (1112) on two opposite surfaces, respectively.
3. A flow battery attemperation system comprising the stack structure of claim 1 or 2, the flow battery attemperation system further comprising:
a storage tank (2), wherein the storage tank (2) is used for containing the heat exchange liquid, the storage tank (2) is communicated with the electric pile structure through a pipeline (3), and the heat exchange liquid can flow into the electric pile structure from the storage tank (2) and flow back into the storage tank (2);
the temperature detection module (4) is connected with the electric pile structure and is used for respectively detecting the temperature of the electrolyte flowing into and out of the electric pile structure;
a regulating module (5), said regulating module (5) being arranged in said duct (3), said regulating module (5) being intended to regulate the temperature of said heat exchange fluid flowing into said galvanic pile structure;
the control module (6), the control module (6) respectively with adjust module (5) and temperature detection module (4) electricity is connected.
4. The flow battery tempering system according to claim 3, characterized in that said regulating module (5) comprises a heating unit (51) and a cooling unit (52), said heating unit (51) and said cooling unit (52) being arranged on said storage tank (2) and being connected with said control module (6), said heating unit (51) being adapted to heat said heat exchange fluid in said storage tank (2), said cooling unit (52) being adapted to cool said heat exchange fluid in said storage tank (2).
5. The flow battery attemperation system according to claim 4, further comprising a flow control pump (7), wherein the flow control pump (7) is arranged in the pipeline (3) and electrically connected with the control module (6) to regulate the flow of the heat exchange fluid flowing into the storage tank (2).
6. The flow battery tempering system according to claim 3, further comprising a control valve (8), said control valve (8) being arranged in said conduit (3) for controlling a flow rate of said heat exchange fluid in said conduit (3).
7. The flow battery attemperation system of claim 3, further comprising a positive electrolyte storage tank and a negative electrolyte storage tank, wherein the stack structure is connected to the positive electrolyte storage tank and the negative electrolyte storage tank via a pipeline, respectively.
8. A control method of a flow battery temperature regulation system is characterized by comprising the following steps:
acquiring the temperature of electrolyte flowing into and out of the galvanic pile structure to obtain the temperature of heat exchange liquid in the galvanic pile structure;
when the temperature of the heat exchange liquid in the galvanic pile structure is judged to be higher than the preset temperature, the control and regulation module (5) cools the heat exchange liquid flowing into the galvanic pile structure;
and when the temperature of the heat exchange liquid in the galvanic pile structure is judged to be lower than the preset temperature, the control and regulation module (5) heats the heat exchange liquid flowing into the galvanic pile structure.
9. The method for controlling the flow battery temperature regulating system according to claim 8, further comprising:
the flow of the heat exchange liquid flowing into the storage tank (2) is adjusted by adjusting the rotating speed of the flow control pump (7).
10. The method for controlling the flow battery temperature regulating system according to claim 8, further comprising:
the flow rate of the heat exchange liquid in the pipeline (3) is adjusted through a control valve (8).
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| CN202210154254.3A CN114220986A (en) | 2022-02-21 | 2022-02-21 | Electric pile structure, flow battery temperature regulating system and control method thereof |
| CN202222165334.7U CN218769633U (en) | 2022-02-21 | 2022-08-17 | Electric pile structure and flow battery temperature regulating system |
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| CN202210154254.3A CN114220986A (en) | 2022-02-21 | 2022-02-21 | Electric pile structure, flow battery temperature regulating system and control method thereof |
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| CN218769633U (en) | 2023-03-28 |
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