CN112151844A - Heat insulation plate for flow battery stack and flow battery stack with heat insulation plate - Google Patents
Heat insulation plate for flow battery stack and flow battery stack with heat insulation plate Download PDFInfo
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- CN112151844A CN112151844A CN201911166365.0A CN201911166365A CN112151844A CN 112151844 A CN112151844 A CN 112151844A CN 201911166365 A CN201911166365 A CN 201911166365A CN 112151844 A CN112151844 A CN 112151844A
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04067—Heat exchange or temperature measuring elements, thermal insulation, e.g. heat pipes, heat pumps, fins
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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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
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- 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
Abstract
The invention discloses a heat insulation plate for a flow battery stack and the flow battery stack with the heat insulation plate, wherein the heat insulation plate comprises a first plate body and a second plate body which are arranged in a stacking mode in the thickness direction, a first electrolyte flow channel extending on the first plate body is formed on the first plate body, a second electrolyte flow channel extending on the second plate body is formed on the second plate body, and the first electrolyte flow channel and the second electrolyte flow channel are separated. According to the heat preservation plate for the flow battery stack, the heat preservation effect can be formed on the adjacent battery units, the performance consistency and stability among the battery units are improved, the energy efficiency of the battery is improved, the cost of a battery system is reduced, and the problem that the performance of the battery units is inconsistent in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of flow batteries, in particular to a heat-insulating plate for a flow battery stack and the flow battery stack with the heat-insulating plate.
Background
Electric energy plays a vital powerful role in our lives. The traditional power generation mode continuously consumes non-renewable natural energy sources (petroleum and coal) for a short time, and a large amount of waste and gas polluting the environment are generated in the power generation process. Energy crisis and environmental pressures have driven traditional energy systems to be transformed into renewable energy sources. With the application of energy sources such as wind energy, solar energy, geothermal energy and the like, the research and the application of a novel energy storage system are promoted.
At present, the high-capacity energy storage technology mainly comprises mechanical energy storage, electromagnetic energy storage, heat storage, electrochemical energy storage and the like. Among them, the electrochemical energy storage technology is concerned about due to its advantages of short response time, large energy density, flexibility and convenience, etc., and the flow battery is an important component.
The iron-chromium redox flow battery is one of flow batteries, and has the advantages of long service life, high energy conversion efficiency, good safety, environmental friendliness and the like.
The active material of the ferrochrome flow battery is a liquid electrolyte solution with fluidity, which is stored outside and delivered into the battery by a pump for reaction. The electrolyte of positive and negative poles in the battery is separated by ion exchange membrane, and active substance ion in the electrolyte generates valence state change on the surface of inert electrode in the charging and discharging process. When the iron-chromium flow battery works, reactants flow through the electrode and undergo the following oxidation-reduction reaction:
in the Fe/Cr flow battery stack in the related technology, the flow equalizing grooves for the electrolyte to flow are arranged on the flow frame, so that the fluid can be uniformly distributed as much as possible. The related technology also provides a flow frame for a flow battery and a single cell thereof, wherein the flow frame can be used within 70 ℃, and the flow frame can be used for a ferro-chromium battery stack. The flow frame is also provided with a main runner and a branch runner in the frame, the main runner is provided with an annular splitter box, and the design plays a certain role in preventing the solution in the flow battery from flowing in series.
Disclosure of Invention
The present invention is based on the finding by the inventors of the present application of the following facts and problems:
the iron-chromium flow battery stack is composed of a plurality of groups of single batteries, and the performance stability and consistency of each group of single batteries are key indexes for determining the energy efficiency of a battery system. Unlike other flow batteries, the optimal operating temperature of the ferrochrome flow battery is 60-70 ℃, so that the electrolyte needs to be heated externally and then flows into a battery stack. If the first group of battery units and the last group of battery units in the battery stack are directly contacted with the insulating plate, the heat loss of the two groups of battery units is far larger than that of other battery units, so that the working temperature of each group of single batteries is influenced, and the overall performance of the battery stack is influenced.
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an insulation board for a flow battery stack, which can reduce the heat loss of the flow battery stack, so that the temperature of each battery unit is kept at the optimal working temperature, and the working consistency and stability of each battery unit are ensured.
The invention also provides a flow battery stack with the heat insulation plate.
The thermal insulation plate for a flow cell stack according to a first aspect of the invention comprises: the electrolyte tank comprises a first plate body and a second plate body which are arranged in a stacking mode in the thickness direction, wherein a first electrolyte flow channel extending on the first plate body is formed on the first plate body, a second electrolyte flow channel extending on the second plate body is formed on the second plate body, and the first electrolyte flow channel and the second electrolyte flow channel are separated.
According to the insulation board for the flow battery stack in the first aspect of the invention, the first electrolyte flow channel is arranged on the first board body, and the second electrolyte flow channel is arranged on the second board body, so that the positive and negative electrolytes form relatively uniform fluid distribution and temperature field distribution in the flowing process of flowing through the first board body and the second board body, and the insulation board formed by assembling the first board body and the second board body can perform an insulation effect on the adjacent battery units, so that the performance consistency and stability among the battery units are improved, the energy efficiency of the battery is improved, the cost of the battery system is reduced, and the problem of inconsistent performance of the battery units in the prior art is solved. In addition, by spacing the first electrolyte flow path from the second electrolyte flow path, mixing of the electrolytes of the positive and negative electrodes can be prevented.
According to some embodiments of the present invention, the first electrolyte flow channel is formed on a side surface of the first plate body facing the second plate body, and the second electrolyte flow channel is formed on a side surface of the second plate body facing the first plate body.
Further, the first electrolyte flow channel is a groove-shaped flow channel formed by the first plate body with one side surface being recessed toward the other side surface, and the second electrolyte flow channel is a groove-shaped flow channel formed by the second plate body with one side surface being recessed toward the other side surface.
In some embodiments, the insulation board further includes a partition plate disposed between the first plate body and the second plate body to separate the first electrolyte flow channel from the second electrolyte flow channel.
Further, the heated board still includes: the first sealing gasket is arranged between the partition plate and the first plate body and extends around the first electrolyte flow channel to seal the first electrolyte flow channel; and the second sealing gasket is arranged between the partition plate and the second plate body and surrounds the second electrolyte flow channel to extend so as to seal the second electrolyte flow channel.
According to some embodiments of the present invention, one end of the first electrolyte flow channel is formed with a first inlet and outlet hole communicating with the outside, and the other end of the first electrolyte flow channel is formed as a first inlet and outlet groove opening toward the second plate body; and a second access hole communicated with the outside is formed at one end of the second electrolyte flow channel, and a second access groove opened towards the first plate body is formed at the other end of the second electrolyte flow channel.
Further, the first access hole penetrates through the first plate body along the thickness direction of the first plate body, and the second access hole penetrates through the second plate body along the thickness direction of the second plate body; the first plate body is also provided with a first connecting hole which is separated from the first electrolyte flow channel, and the first connecting hole is opposite to and communicated with the second outlet groove in the thickness direction of the heat preservation plate; and a second communicating hole which is separated from the second electrolyte flow channel is formed on the second plate body, and the second communicating hole is opposite to and communicated with the first outlet groove in the thickness direction of the heat preservation plate.
Further, the first access hole is arranged side by side with the first communication hole.
In some embodiments of the invention, the insulation board further comprises: the third sealing gasket is arranged around the first connecting hole and is positioned on the surface of one side, facing the second plate body, of the first plate body; and the fourth sealing gasket is arranged around the second communication hole and is positioned on one side surface of the second plate body facing the first plate body.
In some embodiments, the first electrolyte flow channel includes a plurality of first sub-flow channels connected in parallel at two ends of the first electrolyte flow channel, the second electrolyte flow channel includes a plurality of second sub-flow channels connected in parallel at two ends of the second electrolyte flow channel, the first sub-flow channels extend in a winding manner on the first plate body, and the second sub-flow channels extend in a winding manner on the second plate body.
Furthermore, two ends of the first electrolyte flow channel are respectively provided with a plurality of first flow guiding bridges for guiding flow, and the plurality of first flow guiding bridges are arranged at intervals along the width direction of the first electrolyte flow channel; and second flow guiding bridges for guiding flow are arranged at two ends of the second electrolyte flow channel and comprise a plurality of flow guiding bridges, and the second flow guiding bridges are arranged at intervals along the width direction of the second electrolyte flow channel.
According to some embodiments of the present invention, the first plate body is provided with a first positioning portion, and the second plate body is provided with a second positioning portion which is in positioning fit with the first positioning portion.
According to some embodiments of the invention, at least one of the first plate body and the second plate body is a polypropylene piece or an epoxy-phenolic laminated glass cloth plate.
In some embodiments of the present invention, a first deformation groove is formed on at least one side surface of the first plate, and/or a second deformation groove is formed on at least one side surface of the second plate.
A flow cell stack according to a second aspect of the invention comprises: a plurality of battery cells arranged in a stacked manner in a thickness direction; the first heat insulation plate and the second heat insulation plate are both heat insulation plates for the flow battery stack according to the first aspect of the invention, and are respectively arranged on two sides of the plurality of battery units; first end plate and second end plate, first end plate is established deviating from of first heated board one side of battery unit, the second end plate is located deviating from of second heated board one side of battery unit.
Further, the flow battery stack is an iron-chromium flow battery stack.
According to the flow battery stack, the insulation board for the flow battery stack is arranged, so that the insulation effect on the battery units adjacent to the insulation board in the flow battery stack can be achieved, the performance consistency and stability among the battery units are improved, the battery energy efficiency is improved, the battery system cost is reduced, the problem that the performance of the battery units is inconsistent in the prior art is solved, and the overall performance of the flow battery stack is 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 diagram of a flow cell stack according to an embodiment of the invention;
fig. 2 is an exploded view of the thermal insulation plate of the flow cell stack shown in fig. 1;
FIG. 3 is a front schematic view of a first panel of the insulation panel shown in FIG. 2;
fig. 4 is a rear schematic view of a first panel of the insulation panel shown in fig. 2;
fig. 5 is a schematic front view of a second panel of the insulation panel shown in fig. 2;
fig. 6 is a rear schematic view of a second panel of the insulation panel shown in fig. 2;
fig. 7 is a schematic front view of another embodiment of the first panel of the insulation panel shown in fig. 2;
fig. 8 is a rear view of the first panel of the insulation panel shown in fig. 7.
Reference numerals:
flow cell stack 100:
the number of the battery cells 1 is such that,
the first end plate 2, the first liquid pipe 21,
the second end plate 3, the second liquid pipe 31,
the heat-insulating board 4 is provided with a plurality of heat-insulating boards,
a first plate 41, a first access hole 411, a first access groove 412, a first connecting hole 413, a first electrolyte channel 414, a first sub-channel 4141, a first diversion bridge 415, a first deformation groove 416, a first positioning portion 417, a first hoisting hole 418,
a second plate body 42, a second inlet and outlet hole 421, a second inlet and outlet groove 422, a second communication hole 423, a second electrolyte flow channel 424, a second sub flow channel 4241, a second diversion bridge 425, a second deformation groove 426, a second positioning part 427, a second hoisting hole 428,
a separator 43, a first gasket 44, a second gasket 45, a third gasket 46, a fourth gasket 47,
a stud 5 and a spring 6.
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.
An insulation board 4 for a flow cell stack 100 according to an embodiment of the first aspect of the invention is described below with reference to fig. 1 to 8.
As shown in fig. 2, the heat-insulating plate 4 for the flow cell stack 100 according to the embodiment of the first aspect of the present invention includes: a first plate 41 and a second plate 42.
Specifically, the first plate 41 and the second plate 42 are stacked in a thickness direction (for example, a front-back direction shown in fig. 2), a first electrolyte flow channel 414 is formed on the first plate 41, the first electrolyte flow channel 414 may extend on the first plate 41, and the negative electrolyte may flow in the first electrolyte flow channel 414, a second electrolyte flow channel 424 is formed on the second plate 42, and the second electrolyte flow channel 424 may extend on the second plate 42, and the positive electrolyte may flow in the second electrolyte flow channel 424, and the first electrolyte flow channel 414 and the second electrolyte flow channel 424 are separated to prevent the positive electrolyte and the negative electrolyte from mixing.
When the heated positive electrolyte and negative electrolyte respectively flow through the first electrolyte flow channel 414 on the first plate 41 and the second electrolyte flow channel 424 on the second plate 42, a heat preservation effect is formed on the battery unit 1 adjacent to the heat preservation plate 4. Because electrolyte is circulation heating, so can maintain the constancy of temperature of heated board 4, like this, the fluid temperature difference that gets into every group battery unit 1 is less to improved the performance uniformity and the stability between battery unit 1, improved battery energy efficiency, reduce battery system cost, solved the inconsistent problem of battery unit 1 performance among the prior art.
According to the insulation board 4 for the flow cell stack 100 in the first aspect of the present invention, the first electrolyte flow channel 414 is disposed on the first plate 41, and the second electrolyte flow channel 424 is disposed on the second plate 42, so that the positive and negative electrolytes form relatively uniform fluid distribution and temperature field distribution in the flowing process of flowing through the first plate 41 and the second plate 42, and thus the insulation board 4 formed by assembling the first plate 41 and the second plate 42 can form an insulation effect on the adjacent battery units 1, so as to improve performance consistency and stability between the battery units 1, improve battery energy efficiency, reduce battery system cost, and solve the problem of inconsistent performance of the battery units 1 in the prior art. In addition, spacing the first electrolyte flow path 414 from the second electrolyte flow path 424 prevents mixing of the positive and negative electrolytes.
Referring to fig. 2 to 6, according to some embodiments of the present invention, a first electrolyte flow channel 414 may be formed on a surface of a side of the first plate body 41 facing the second plate body 42 (e.g., a front side of the first plate body 41 shown in fig. 3), and a second electrolyte flow channel 424 may be formed on a surface of a side of the second plate body 42 facing the first plate body 41 (e.g., a rear side of the second plate body 42 shown in fig. 5), so that the first electrolyte flow channel 414 and the second electrolyte flow channel 424 may be conveniently formed. In addition, during the assembly, the side that is formed with first electrolyte runner 414 on first plate body 41 sets up with one side that is formed with second electrolyte runner 424 on second plate body 42 relatively, from this, after first plate body 41 and second plate body 42 assembly formed heated board 4, first electrolyte runner 414 all is inside heated board 4 with second electrolyte runner 424, can prevent that electrolyte from revealing, also is favorable to keeping warm.
For example, as shown in fig. 2, the first plate 41 and the second plate 42 may be stacked in the front-rear direction, the front side surface of the first plate 41 may be opposite to the rear side surface of the second plate 42, the first electrolyte channel 414 may extend along a meander curve on the front side surface of the first plate 41, and the meander curve may be centered and symmetrical with respect to the geometric center of the rear side surface of the first plate 41, so that the negative electrolyte forms a more uniform fluid distribution and temperature field distribution in the first plate 41 during the flowing process of the negative electrolyte in the first electrolyte channel 414; similarly, the second electrolyte flow channel 424 may extend along a serpentine line on the rear side surface of the second plate body 42, and the serpentine line may be centered symmetrically with respect to the geometric center of the front side surface of the second plate body 42, so that the flow of the positive electrolyte in the second electrolyte flow channel 424 may provide a more uniform fluid distribution and temperature field distribution in the second plate body 42. Therefore, relatively uniform fluid distribution and temperature field distribution can be formed in the assembled heat insulation board 4, the heat insulation effect on the flow battery pile can be effectively achieved, and meanwhile the overall fluid resistance of the flow battery pile 100 is not affected.
Further, as shown in fig. 3 and 5, the first electrolyte channel 414 is a groove-shaped channel formed by the first plate 41 being recessed from one side surface toward the other side surface, and the second electrolyte channel 424 is a groove-shaped channel formed by the second plate 42 being recessed from one side surface toward the other side surface. For example, the first electrolyte flow channel 414 may be formed as a groove-type flow channel by the front side surface of the first plate body 41 being recessed rearward, and the second electrolyte flow channel 424 may be formed as a recessed flow channel by the rear side surface of the second plate body 42 being recessed forward, so that the first electrolyte flow channel 414 and the second electrolyte flow channel 424 may be formed inside the assembled heat insulation board 4, thereby confining the electrolyte in the groove flow channel and preventing the electrolyte from leaking from the first electrolyte flow channel 414 or the second electrolyte flow channel 424.
In some embodiments, referring to fig. 2, the heat insulation plate 4 further includes a partition plate 43, the partition plate 43 is disposed between the first plate body 41 and the second plate body 42, and the partition plate 43 may separate the first electrolyte flow passage 414 and the second electrolyte flow passage 424 to prevent the positive and negative electrolytes from mixing.
Preferably, the spacer 43 may be a polypropylene member, and the thickness of the spacer 43 may be in the range of 2mm to 3 mm. Thus, the separator 43 is made of polypropylene, which can prevent the separator 43 from being corroded by the electrolyte, and the separator 43 with a proper thickness can separate the positive and negative electrolytes.
Further, with reference to fig. 3 and 5, the insulation board 4 may further include: a first gasket 44 and a second gasket 45. Specifically, the first gasket 44 is provided between the separator 43 and the first plate body 41, the first gasket 44 extends around the first electrolyte flow passage 414, and the first gasket 44 may be formed in a sheet shape with a peripheral edge substantially parallel to a peripheral edge of the rear side surface of the first plate body 41; a second gasket 45 is provided between the separator 43 and the second plate body 42, the second gasket 45 extends around the second electrolyte flow passage 424, and the second gasket 45 may be formed in a sheet shape with a peripheral edge parallel to a peripheral edge of the front side surface of the second plate body 42. After the heat insulation board 4 is assembled, the first sealing gasket 44 may seal the first electrolyte flow channel 414 to prevent the electrolyte in the first electrolyte flow channel 414 from leaking out from the gap between the first plate 41 and the partition plate 43, and the second sealing gasket 45 may seal the second electrolyte flow channel 424 to prevent the electrolyte in the second electrolyte flow channel 424 from leaking out from the gap between the second plate 42 and the partition plate 43.
Further, at least one of the first sealing gasket 44 and the second sealing gasket 45 is an epdm rubber or a viton, and preferably, the first sealing gasket 44 and the second sealing gasket 45 may be both epdm rubber or both viton, so that the first sealing gasket 44 and the second sealing gasket 45 can better seal the first electrolyte flow channel 414 and the second electrolyte flow channel 424, and simultaneously, the first sealing gasket 44 and the second sealing gasket 45 can have the same performance and the same service life.
According to some embodiments of the present invention, one end of the first electrolyte flow channel 414 (e.g., the lower end of the first electrolyte flow channel 414 shown in fig. 3) is formed with a first access hole 411, the first access hole 411 may communicate with the battery cell 1 inside the flow cell stack 100 to facilitate the anode electrolyte to flow into or out of the first electrolyte flow channel 414, the other end of the first electrolyte flow channel 414 (e.g., the upper end of the first electrolyte flow channel 414 shown in fig. 3) is formed as a first access groove 412, the opening of the first access groove 412 may face the second plate body 42, the first access groove 412 may be disposed to guide the anode electrolyte into the first electrolyte flow channel 414, one end of the second electrolyte flow channel 424 (e.g., the upper end of the second electrolyte flow channel 424 shown in fig. 5) is formed with a second access hole 421, the second access hole 421 may communicate with the outside of the flow cell stack 100, the flow of the positive electrode electrolyte into or out of the second electrolyte flow passage 424 is facilitated, the other end of the second electrolyte flow passage 424 (e.g., the lower end of the second electrolyte flow passage 424 shown in fig. 5) is formed as a second outlet groove 422, and the opening of the second outlet groove 422 may face the first plate body 41.
Further, with reference to fig. 3 and 4 and fig. 5 and 6, the first access hole 411 penetrates the first plate 41 in a thickness direction (e.g., a front-rear direction shown in fig. 3) of the first plate 41, and the second access hole 421 penetrates the second plate 42 in a thickness direction (e.g., a front-rear direction shown in fig. 5) of the second plate 42; a first through hole 413 is further formed in the first plate 41, the first through hole 413 is spaced apart from the first electrolyte flow channel 414, and the first through hole 413 and the second outlet groove 422 are opposite to and communicate with each other in a thickness direction (e.g., a front-rear direction shown in fig. 1) of the thermal insulation plate 4; a second communication hole 423 is further formed in the second plate 42, the second communication hole 423 being spaced apart from the second electrolyte flow channel 424, and the second communication hole 423 and the first inlet/outlet groove 412 being opposed to and communicating with each other in the thickness direction of the heat insulating plate 4.
The flow direction of the positive and negative electrolytes in heat insulating plate 4 will be described below with reference to fig. 1 to 6, taking the flow of the positive and negative electrolytes into flow cell stack 100 as an example.
When negative electrolyte flows into flow cell stack 100, the flow direction is: the negative electrolyte enters the first outlet groove 412 of the first plate body 41 from the second communication hole 423 of the second plate body 42 of the heat insulation plate 4 at the rear end of the flow battery stack 100 (the rear end of the flow battery stack 100 shown in fig. 1), then is guided by the first guide bridges 415 when flowing out of the first outlet groove 412, enters the first sub-channels 4141 of the first electrolyte channel 414, flows along the extending direction of the first sub-channels 4141, and is collected before entering the first inlet/outlet hole 411, and the collected negative electrolyte enters the electrolyte channel formed by the plurality of battery units 1 through the first inlet/outlet hole 411, so that the negative electrolyte can enter the flow battery stack 100 for operation.
When positive electrolyte flows into flow cell stack 100, the flow direction is: the positive electrode electrolyte enters the heat insulation plate 4 from a second access hole 421 on a second plate body 42 of a second heat insulation plate 4 at the rear end of the flow cell stack 100 (the rear end of the flow cell stack 100 shown in fig. 1), is guided by a plurality of second guide bridges 425 when flowing out of the second access hole 421 and enters a plurality of second sub-flow channels 4241 of a second electrolyte flow channel 424, flows along the extending direction of the plurality of second sub-flow channels 4241, and is converged before entering a second access groove 422, and the converged positive electrode electrolyte enters an electrolyte flow channel formed by a plurality of battery units 1 through a first connecting hole 413, so that the positive electrode electrolyte can enter the flow cell stack 100 for operation.
Further, the first access hole 411 is arranged side by side with the first communication hole 413. Similarly, the second manhole 421 is arranged side by side with the second communication hole 423. Therefore, on one hand, liquid pipes (namely, a first liquid pipe 21 and a second liquid pipe 31) needed by the positive and negative electrolyte to enter and exit the insulation board 4 can be conveniently and compactly arranged, and on the other hand, after the first board body 41 and the second board body 42 are assembled into the insulation board 4, the first communication hole 413 can be right opposite to the second outlet groove 422, and the second communication hole 423 can be right opposite to the first outlet groove 412, so that the smoothness of a flow channel of the electrolyte is ensured, the fluid resistance of the insulation board 4 to the electrolyte is reduced, and the performance of the cell stack is improved.
Further, the first through holes 413 may include two, the upper first through hole 413 may be disposed side by side with the first entrance slot 412, and the lower first through hole 413 may be disposed side by side with the first entrance hole 411; similarly, the second communication holes 423 may include two, the second communication hole 423 at the upper side may be disposed side by side with the second entrance and exit hole 421, and the second communication hole 423 at the lower side may be disposed side by side with the second exit and entrance groove 422. In this way, when the first plate 41 and the second plate 42 are assembled into the insulation board 4, the second inlet/outlet hole 421 may be aligned with the first communication hole 413 on the upper side of the first plate 41, and the first inlet/outlet hole 411 may be aligned with the second communication hole 423 on the lower side of the second plate 42. Therefore, in the embodiment, the two communication holes are respectively formed in the first plate body 41 and the second plate body 42, so that the first plate body 41 and the second plate body 42 can be conveniently assembled, a passage suitable for flowing of positive electrolyte and negative electrolyte is formed inside the assembled heat insulation plate 4, the first electrolyte flow channel 414 and the second electrolyte flow channel 424 inside the heat insulation plate 4 can be conveniently communicated with the outside, the first communication hole 413 on the upper side or the lower side of the first plate body 41 can be selected for pipe distribution during assembly according to actual needs, and similarly, the second communication hole 423 on the upper side or the lower side of the second plate body 42 can be selected for pipe distribution according to actual needs. It should be noted that the heat insulation plates 4 at the two ends of the flow cell stack 100 may have the same structure, which facilitates the exchange and enhances the versatility.
In some embodiments of the present invention, with reference to fig. 3 and 5, the heat insulation board 4 further includes: a third gasket 46 and a fourth gasket 47. Specifically, the third gasket 46 is provided around the first communication hole 413, and the third gasket 46 is located on a side surface of the first plate body 41 facing the second plate body 42, whereby the third gasket 46 can prevent leakage of the electrolyte flowing through the first communication hole 413; the fourth gasket 47 is provided around the second communication hole 423, and the fourth gasket 47 is located on a side surface of the second plate body 42 facing the first plate body 41, whereby the fourth gasket 47 can prevent leakage of the electrolyte in the second communication hole 423.
Further, at least one of the third gasket 46 and the fourth gasket 47 is an ethylene propylene diene monomer or a fluororubber, and preferably, both the third gasket 46 and the fourth gasket 47 may be an ethylene propylene diene monomer or a fluororubber, so that the corrosion resistance of the third gasket 46 and the corrosion resistance of the fourth gasket 47 may be kept the same, the sealing performance of the first communication hole 413 and the second communication hole 423 may be kept the same, and the reliability of the heat preservation board 4 may be improved.
In some embodiments, referring to fig. 3 and 5, the first electrolyte channel 414 may include a plurality of first sub-channels 4141, the plurality of first sub-channels 4141 are connected in parallel between two ends of the first electrolyte channel 414, the second electrolyte channel 424 may include a plurality of second sub-channels 4241, the plurality of second sub-channels 4241 are connected in parallel between two ends of the second electrolyte channel 424, the first sub-channels 4141 extend in a winding manner on the first plate 41, and the second sub-channels 4241 extend in a winding manner on the second plate 42. That is, the plurality of first sub-channels 4141 may be connected in parallel between the first access hole 411 and the first access slot 412, the plurality of first sub-channels 4141 may share the same first access hole 411 and the same first access slot 412, the plurality of first sub-channels 4141 may extend in the same direction as the first electrolyte channel 414, and the plurality of first sub-channels 4141 may be separated by the partition plate 43; the plurality of second sub-flow passages 4241 may be connected in parallel between the second access hole 421 and the second access groove 422, the plurality of second sub-flow passages 4241 may share the same second access hole 421 and the same second access groove 422, the plurality of second sub-flow passages 4241 may extend in the same direction as the second electrolyte flow passage 424, the plurality of second sub-flow passages 4241 may be separated by a partition plate 43, the plurality of first sub-flow passages 4141 may extend in parallel, and the plurality of second sub-flow passages 4241 may extend in parallel. Therefore, the fluid resistance of the electrolyte in the first plate 41 and the second plate 42 can be reduced, the electrolyte can be more uniformly distributed in the heat-insulating plate 4, and the heat-insulating effect can be further improved.
When the electrolyte enters the first plate 41, the electrolyte may flow to the plurality of first sub-channels 4141 through the first access holes 411, and finally converge in the first access groove 412; when electrolyte gets into second plate body 42, can flow to a plurality of second sub-runners 4241 respectively through second access hole 421, finally assemble in second access groove 422, this embodiment is through all designing first runner and second runner to including a plurality of parallel sub-runners, not only can reduce the fluid resistance of electrolyte in first heat preservation 4, can also make electrolyte more evenly distributed in heat preservation 4, and then improve the heat preservation effect.
Further, two ends of the first electrolyte flow channel 414 are respectively provided with a first flow guiding bridge 415, the first flow guiding bridges 415 may be used for guiding the electrolyte, the first flow guiding bridges 415 may include a plurality of first flow guiding bridges 415, and the plurality of first flow guiding bridges 415 are arranged at intervals along the width direction (the left-right direction shown in fig. 3) of the first electrolyte flow channel 414; both ends of the second electrolyte channel 424 are provided with a second flow guiding bridge 425, the second flow guiding bridge 425 may be used to guide the electrolyte, the second flow guiding bridge 425 may include a plurality of second flow guiding bridges 425, and the plurality of second flow guiding bridges 425 are arranged at intervals along the width direction (the left-right direction shown in fig. 5) of the second electrolyte channel 424. Thus, the plurality of first flow guiding bridges 415 in this embodiment help to guide the electrolyte into the plurality of first sub flow passages 4141 and reduce the fluid resistance of the first electrolyte flow passage 414, and the plurality of second flow guiding bridges 425 in this embodiment help to guide the electrolyte into the plurality of second sub flow passages 4241 and reduce the fluid resistance of the second electrolyte flow passage 424.
According to some embodiments of the present invention, referring to fig. 3 and 5, the first plate 41 may be provided with a first positioning portion 417, and the second plate 42 may be provided with a second positioning portion 427 that is in positioning fit with the first positioning portion 417, wherein the first positioning portion 417 and the second positioning portion 427 may be formed as pin holes, and pins are used to position and connect the first plate 41 and the second plate 42 during assembly, thereby facilitating the processing and forming and improving the assembly efficiency.
According to some embodiments of the present invention, at least one of first board body 41 and second board body 42 is a polypropylene piece or an epoxy-phenolic laminated glass cloth board. Preferably, the first board body 41 and the second board body 42 may be both polypropylene pieces or both epoxy phenolic aldehyde laminated glass cloth boards, so that the mechanical property and the chemical property of the first board body 41 can be kept consistent, and the performance and the reliability of the assembled insulation board 4 can be improved.
In some embodiments of the present invention, referring to fig. 7 and 8, at least one side surface of the first plate 41 is formed with a first deformation groove 416, and/or at least one side surface of the second plate 42 is formed with a second deformation groove 426. That is to say, a deformation groove may be formed on a surface of one side of the first plate 41 opposite to the second plate 42, a deformation groove may be formed on a surface of one side of the first plate 41 away from the second plate 42, or deformation grooves may be formed on surfaces of two sides of the first plate 41; similarly, a deformation groove may be formed on a side surface of the second plate 42 opposite to the first plate 41, a side surface of the second plate 42 away from the first plate 41 may be formed with a deformation groove, and both sides of the second plate 42 may be formed with deformation grooves on surfaces.
The deformation groove on the first plate 41 may be spaced apart from the first electrolyte channel 414, and the deformation groove on the second plate 42 may be spaced apart from the second electrolyte channel 424, so as to facilitate the machining and forming of the first electrolyte channel 414 and the second electrolyte channel 424, and meanwhile, the first deformation groove 416 and the second deformation groove 426 may offset the structural deformation of the first plate 41 and the second plate 42 caused by the machining of the first electrolyte channel 414 and the second electrolyte channel 424, and may not affect the flowing direction of the electrolyte.
In addition, with reference to fig. 1 to 8, the first plate body 41 is provided with first hoisting holes 418 for hoisting, the first hoisting holes 418 may include two, two first hoisting holes 418 may be arranged at intervals on the upper side surface of the first plate body 41, and the two first hoisting holes 418 are symmetrically arranged about the central line of the upper side surface of the first plate body 41 in the front-back direction; similarly, the second plate body 42 is provided with two second hoisting holes 428 for hoisting, the second hoisting holes 428 may include two second hoisting holes 428, the two second hoisting holes 428 may be spaced apart from each other on the upper side of the second plate body 42, and the two second hoisting holes 428 are symmetrically arranged about the central line of the upper side of the second plate body 42 in the front-rear direction. Thus, when the heat insulation plate 4 is hoisted, the gravity center of the heat insulation plate 4 can be ensured not to incline.
Further, the thickness of the first plate body 41 and the second plate body 42 is not greater than 75mm, and the depth of the first electrolyte flow channel 414 and the second electrolyte flow channel 424 is not greater than 50mm, that is, the thickness of the first plate body 41 may be less than or equal to 75mm, for example, the thickness of the first plate body 41 may be 75mm, 70mm, 65mm, 60mm, or the like, and the thickness of the second plate body 42 may be equal to the thickness of the first plate body 41. The depth of the first electrolyte flow channel 414 may be less than or equal to 50mm, for example, the depth of the first electrolyte flow channel 414 may be 50mm, 45mm, or 40mm, etc., the depth of the first electrolyte flow channel 414 may be reasonably set with reference to the thickness of the first plate body 41, and the depth of the second electrolyte flow channel 424 may be the same as the depth of the first electrolyte flow channel 414. Therefore, the thicknesses of the first plate 41 and the second plate 42 in this embodiment can make the assembled heat insulation board 4 have good heat insulation performance, and the depths of the first electrolyte flow channel 414 and the second electrolyte flow channel 424 in this embodiment can make the fluid resistance of the heat insulation board 4 to the electrolyte weakened, and at the same time, facilitate the processing and molding of the first electrolyte flow channel 414 and the second electrolyte flow channel 424.
A flow cell stack 100 according to a second aspect of the invention is described below with reference to fig. 1.
As shown in fig. 1, a flow cell stack 100 according to a second aspect of the invention includes: a plurality of battery units 1, a first insulation board 4, a second insulation board 4, a first end plate 2 and a second end plate 3.
Specifically, the plurality of battery units 1 may be stacked in the thickness direction (the front-back direction shown in fig. 1) of the flow cell stack 100, and the plurality of battery units 1 are each formed with a flow hole corresponding to the first connection hole 413, the first inlet/outlet and the first inlet/outlet groove 412, and when the plurality of battery units 1 are stacked together, the flow holes of the plurality of battery units 1 may be collectively formed as an electrolyte flow channel, each of which is communicated with the first connection hole 413, the first inlet/outlet and the first inlet/outlet groove 412, thereby facilitating the circulation flow of the electrolyte inside the battery stack.
The first heat preservation plate 4 and the second heat preservation plate 4 are both heat preservation plates 4 for the flow battery stack 100 according to the first aspect of the present invention, and the first heat preservation plate 4 and the second heat preservation plate 4 are respectively disposed on two sides of the plurality of battery units 1, for example, the first heat preservation plate 4 may be disposed on a front side of a foremost battery unit 1 among the plurality of battery units 1, and the second heat preservation plate 4 may be disposed on a rear side of a rearmost battery unit 1 among the plurality of battery units 1, in other words, the plurality of battery units 1 are stacked in front of and behind each other between the first heat preservation plate 4 and the second heat preservation plate 4, so that the first heat preservation plate 4 and the second heat preservation plate 4 can exert a heat preservation effect, and an electrolyte flow channel in the heat preservation plate 4 is convenient for guiding an electrolyte in the flow battery stack 100.
The first end plate 2 is arranged on one side of the first heat-insulating plate 4, which is far away from the battery unit 1, the second end plate 3 is arranged on one side of the second heat-insulating plate 4, which is far away from the battery unit 1, for example, the first end plate 2 may be disposed at a front side of the first heat insulation plate 4, the second end plate 3 may be disposed at a rear side of the second heat insulation plate 4, the first end plate 2 may be formed with a plurality of first liquid tubes 21 corresponding to the second communication holes 423, the second entrance holes 421, and the second entrance grooves 422 in a one-to-one manner, the second end plate 3 may be formed with a plurality of second liquid tubes 31 corresponding to the second communication holes 423, the second entrance holes 421, and the second entrance grooves 422 in a one-to-one manner, the plurality of first liquid tubes 21 may extend from a front side of the first end plate 2 to face away from the flow cell stack 100, and the plurality of second liquid tubes 31 may extend from a rear side of the second end plate 3 to face away from the flow cell stack 100 to face away from the electrolyte tube inlet into the flow cell stack 100.
Further, a plurality of first through holes may be formed on two side surfaces of the first end plate 2 in the front-rear direction, preferably, the plurality of first through holes may be four, wherein four first through holes may be arranged at positions near four corners of two side surfaces of the first end plate 2 in the front-rear direction, respectively, in a centrosymmetric manner, and similarly, four second through holes may be formed on the second end plate 3, and the four second through holes may correspond to the four first through holes one to one in the front-rear direction. Therefore, in the assembly process of the flow cell stack 100, the components of the flow cell stack 100 can be stacked in the front-rear direction, then press-fitted by a press, and then the four high-strength studs 5 and the springs 6 are respectively connected with the corresponding first through holes and the corresponding second through holes, so that the flow cell stack 100 is packaged.
Further, the flow cell stack 100 is a ferro-chrome flow cell stack 100.
According to the flow battery stack 100 disclosed by the invention, by arranging the heat insulation plate 4 for the flow battery stack 100 in the first aspect, a heat insulation effect can be formed on the battery units 1 adjacent to the heat insulation plate 4 in the flow battery stack 100, so that the performance consistency and stability among the battery units 1 are improved, the battery energy efficiency is improved, the battery system cost is reduced, the problem of inconsistent performance of the battery units 1 in the prior art is solved, and the overall performance of the flow battery stack 100 is improved.
A flow cell stack 100 according to a particular embodiment of the invention will now be described with reference to fig. 1-8.
Referring to fig. 1, a flow cell stack 100 includes: a plurality of battery units 1, a first insulation board 4, a second insulation board 4, a first end plate 2 and a second end plate 3.
Wherein, a plurality of battery units 1 can be stacked in the front-back direction, a plurality of circulation holes corresponding to the first communication hole 413, the first inlet/outlet and the first inlet/outlet groove 412 are formed on each of the plurality of battery units 1, and when the plurality of battery units 1 are stacked together, the plurality of circulation holes on the plurality of battery units 1 can be formed into a plurality of electrolyte channels; the first heat insulating plate 4 may be provided on a front side of a foremost battery unit 1 among the plurality of battery units 1, and the second heat insulating plate 4 may be provided on a rear side of a rearmost battery unit 1 among the plurality of battery units 1, such that the plurality of battery units 1 are arranged in a stacked manner in front and rear in the middle between the first heat insulating plate 4 and the second heat insulating plate 4; the first end plate 2 can be arranged at the front side of the first heat preservation plate 4, the second end plate 3 can be arranged at the rear side of the second heat preservation plate 4, the first end plate 2 can be provided with a plurality of first liquid pipes 21 in one-to-one correspondence with the second communication holes 423, the second access holes 421 and the second access grooves 422, the second end plate 3 can be provided with a plurality of second liquid pipes 31 in one-to-one correspondence with the second communication holes 423, the second access holes 421 and the second access grooves 422, the plurality of first liquid pipes 21 can extend forwards from the front side of the first end plate 2 away from the flow cell stack 100, and the plurality of second liquid pipes 31 can extend backwards from the rear side of the second end plate 3 away from the flow cell stack 100.
When negative electrolyte flows into flow cell stack 100, the flow direction is: the negative electrode electrolyte flows into the second communication hole 423 of the second plate 42 of the second heat insulation plate 4 from the second liquid pipe 31 on the rear side of the second end plate 3, enters the first inlet/outlet groove 412 of the first plate 41 through the second communication hole 423, is guided by the first guide bridges 415 when flowing out of the first inlet/outlet groove 412, enters the first sub-channels 4141 of the first electrolyte channel 414, flows along the extending direction of the first sub-channels 4141, and is collected before entering the first inlet/outlet hole 411, and the collected negative electrode electrolyte enters the electrolyte channel formed by the plurality of battery units 1 through the first inlet/outlet hole 411, so that the negative electrode electrolyte can enter the flow battery stack 100 to work.
When negative electrolyte flows out of flow cell stack 100, the flow direction is: the electrolyte flow channel formed by the plurality of battery cells 1 enters the first access hole 411 of the first plate 41 of the first heat-insulating plate 4, and then flows out of the first access hole 411, and is guided by the plurality of first guide bridges 415 to enter the plurality of first sub-flow channels 4141 in the first electrolyte flow channel 414, and flows along the extending direction of the plurality of first sub-flow channels 4141, and then converges before entering the first access groove 412, and the converged negative electrolyte enters the second communication hole 423 of the second plate 42 through the first access groove 412, and finally circulates along the second communication hole 423 and the first liquid pipe 21 on the first end plate 2 opposite thereto.
When positive electrolyte flows into flow cell stack 100, the flow direction is: the positive electrolyte flows into the second access hole 421 on the second plate body 42 of the second insulation plate 4 from the second liquid pipe 31 on the rear side surface of the second end plate 3, is guided by the second guide bridges 425 when flowing out of the second access hole 421, enters the second sub-flow channels 4241 of the second electrolyte flow channel 424, flows along the extending direction of the second sub-flow channels 4241, and is converged before entering the second access groove 422, and the converged positive electrolyte enters the electrolyte flow channel formed by the battery units 1 through the first communication hole 413, so that the positive electrolyte can enter the flow battery stack 100 to work.
When positive electrolyte flows into flow cell stack 100, the flow direction is: the electrolyte flow channel formed by the plurality of battery cells 1 enters the first through hole 413 of the first plate body 41 of the first heat-insulating plate 4, flows into the second inlet and outlet groove 422 opposite to the first through hole 413, is guided by the plurality of second guide bridges 425 when flowing out of the second inlet and outlet groove 422, enters the plurality of second sub-flow channels 4241 in the second electrolyte flow channel 424, flows along the extending direction of the plurality of second sub-flow channels 4241, and is converged before entering the second inlet and outlet hole 421, and the converged positive electrode electrolyte enters the second inlet and outlet hole 421 and circulates along the second inlet and outlet hole 421 and the first liquid pipe 21 on the first end plate 2 opposite to the second inlet and outlet hole 421.
According to the flow battery stack 100 of the present invention, the positive and negative electrolytes respectively flow into the flow battery stack 100 through the first heat insulating plate 4 at a certain flow rate, and the positive and negative electrolytes are separated by the separator 43 inside the heat insulating plate 4, so that the positive and negative electrolytes are prevented from mixing with each other. Meanwhile, the flow route of the positive electrolyte and the negative electrolyte in the cell stack is X-shaped, and the positive electrolyte and the negative electrolyte have the same flow channel structure by the flow mode, so that the internal fluid resistance of the cell is reduced, and the internal resistance is reduced.
When the heated electrolytes of the positive and negative electrodes flow through the first insulating plate 4 and the second insulating plate 4, the heat insulating effect is exerted on the foremost battery cell 1 and the rearmost battery cell 1. Because the electrolyte is circularly heated, the temperature of the heat-insulating plate 4 can be kept constant, so that the temperature difference of fluid entering each group of battery units 1 is within +/-5 ℃, the consistency and stability among a plurality of battery units 1 are improved, the energy efficiency of the battery is improved, and the cost of a battery system is reduced.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "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 the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; 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 by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (16)
1. The heat insulation plate for the flow battery stack is characterized by comprising a first plate body and a second plate body which are arranged in a stacking mode in the thickness direction, wherein a first electrolyte flow channel extending on the first plate body is formed in the first plate body, a second electrolyte flow channel extending on the second plate body is formed in the second plate body, and the first electrolyte flow channel and the second electrolyte flow channel are isolated.
2. The thermal insulation plate for a flow cell stack according to claim 1, wherein the first electrolyte flow channel is formed on a side surface of the first plate body facing the second plate body, and the second electrolyte flow channel is formed on a side surface of the second plate body facing the first plate body.
3. The thermal insulation plate for a flow cell stack according to claim 2, wherein the first electrolyte flow channel is a groove-shaped flow channel formed by the first plate body with the one side surface being recessed toward the other side surface, and the second electrolyte flow channel is a groove-shaped flow channel formed by the second plate body with the one side surface being recessed toward the other side surface.
4. The thermal insulation plate for a flow cell stack of claim 2 or 3, further comprising a partition plate disposed between the first plate body and the second plate body to separate the first electrolyte flow channel from the second electrolyte flow channel.
5. The thermal insulation plate for a flow cell stack of claim 4, further comprising:
the first sealing gasket is arranged between the partition plate and the first plate body and extends around the first electrolyte flow channel to seal the first electrolyte flow channel;
and the second sealing gasket is arranged between the partition plate and the second plate body and surrounds the second electrolyte flow channel to extend so as to seal the second electrolyte flow channel.
6. The thermal insulation plate for a flow cell stack of claim 3,
a first access hole communicated with the outside is formed at one end of the first electrolyte flow channel, and a first access groove opened towards the second plate body is formed at the other end of the first electrolyte flow channel;
and a second access hole communicated with the outside is formed at one end of the second electrolyte flow channel, and a second access groove opened towards the first plate body is formed at the other end of the second electrolyte flow channel.
7. The thermal insulation plate for a flow cell stack according to claim 6, wherein the first access hole penetrates through the first plate body in a thickness direction of the first plate body, and the second access hole penetrates through the second plate body in a thickness direction of the second plate body;
the first plate body is also provided with a first connecting hole which is separated from the first electrolyte flow channel, and the first connecting hole is opposite to and communicated with the second outlet groove in the thickness direction of the heat preservation plate;
and a second communicating hole which is separated from the second electrolyte flow channel is formed on the second plate body, and the second communicating hole is opposite to and communicated with the first outlet groove in the thickness direction of the heat preservation plate.
8. The thermal insulation plate for a flow cell stack according to claim 7, wherein the first access hole is arranged side by side with the first communication hole.
9. The thermal insulation plate for a flow cell stack of claim 7, further comprising:
the third sealing gasket is arranged around the first connecting hole and is positioned on the surface of one side, facing the second plate body, of the first plate body;
and the fourth sealing gasket is arranged around the second communication hole and is positioned on one side surface of the second plate body facing the first plate body.
10. The thermal insulation plate for a flow cell stack according to claim 6, wherein the first electrolyte flow channel comprises a plurality of first sub-flow channels connected in parallel at two ends of the first electrolyte flow channel, the second electrolyte flow channel comprises a plurality of second sub-flow channels connected in parallel at two ends of the second electrolyte flow channel, the first sub-flow channels are extended in a winding manner on the first plate body, and the second sub-flow channels are extended in a winding manner on the second plate body.
11. The heat insulation board for the flow battery stack according to claim 10, wherein first flow guiding bridges for guiding flow are arranged at two ends of the first electrolyte flow channel, the first flow guiding bridges comprise a plurality of first flow guiding bridges, and the first flow guiding bridges are arranged at intervals along the width direction of the first electrolyte flow channel;
and second flow guiding bridges for guiding flow are arranged at two ends of the second electrolyte flow channel and comprise a plurality of flow guiding bridges, and the second flow guiding bridges are arranged at intervals along the width direction of the second electrolyte flow channel.
12. The thermal insulation plate for the flow cell stack as claimed in claim 1, wherein a first positioning portion is provided on the first plate, and a second positioning portion matched with the first positioning portion is provided on the second plate.
13. The thermal insulation plate for a flow cell stack according to claim 1, wherein at least one of the first plate body and the second plate body is a polypropylene piece or an epoxy phenolic laminated glass cloth plate.
14. The thermal insulation plate for the flow cell stack according to claim 1, wherein at least one side surface of the first plate body is formed with a first deformation groove, and/or at least one side surface of the second plate body is formed with a second deformation groove.
15. A flow battery stack, comprising:
a plurality of battery cells arranged in a stacked manner in a thickness direction;
the first heat insulation plate and the second heat insulation plate are both heat insulation plates for the flow battery stack according to any one of claims 1 to 14, and are respectively arranged on two sides of the plurality of battery units;
first end plate and second end plate, first end plate is established deviating from of first heated board one side of battery unit, the second end plate is located deviating from of second heated board one side of battery unit.
16. The flow cell stack of claim 15, wherein the flow cell stack is a ferro-chromium flow cell stack.
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| CN201911166365.0A CN112151844B (en) | 2019-11-25 | 2019-11-25 | Heat insulation plate for flow battery stack and flow battery stack with heat insulation plate |
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| CN201911166365.0A CN112151844B (en) | 2019-11-25 | 2019-11-25 | Heat insulation plate for flow battery stack and flow battery stack with heat insulation plate |
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| CN2865019Y (en) * | 2005-06-29 | 2007-01-31 | 胜光科技股份有限公司 | Flow passage plate structure for fuel battery |
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