Liquid flow battery system and separator end plate
By integrating flow channels into the electrolyte distribution endplate, the problems of high production and space costs in traditional flow batteries are solved, enabling more efficient electrolyte distribution and collection, reducing costs and improving coulombic efficiency.
Patent Information
- Application Number
- CN202521930840.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-09
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-09
AI Technical Summary
Traditional flow batteries have high production and space costs, mainly due to the need for a large number of coils.
The flow channels are integrated on the liquid distribution end plate, eliminating the need for coils. The first and second flow channels are directly set on the substrate, and through holes are set on both sides to realize the input, output, distribution and collection of electrolyte.
It reduces production and space costs, improves coulombic efficiency, reduces energy loss, and the flow channel design extends the ion transport path and suppresses the generation of bypass current.
Smart Images
Figure CN224683113U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of flow battery energy storage technology, and in particular to a liquid-separating end plate and a flow battery system. Background Technology
[0002] Driven by the "dual carbon" goals, the installed capacity of wind power and photovoltaic power has increased rapidly, highlighting the demand for long-term energy storage. Vanadium redox flow batteries, due to their intrinsic safety, long cycle life (>6000 cycles), and flexible deployment, have become one of the mainstream technologies for long-term energy storage in the 100 kilowatt to gigawatt range. Traditional flow batteries typically employ a centralized liquid inlet and outlet design with a "parallel main pipe + branch pipes," requiring a large number of coils and resulting in higher production costs. Utility Model Content
[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a liquid distribution end plate and a flow battery system, which can directly integrate flow channels on the liquid distribution end plate, eliminating the need for coils and reducing production costs.
[0004] According to a first aspect embodiment of this application, a liquid distribution end plate includes a substrate. A first flow channel and a second flow channel are provided on one side of the substrate. A first through-hole and a second through-hole are provided on the periphery of the substrate. The first through-hole communicates with the first flow channel, and the second through-hole communicates with the second flow channel. The first through-hole is used for inputting positive or negative electrolyte, and the second through-hole is used for outputting negative or positive electrolyte. A third through-hole and a fourth through-hole are also provided on both sides of the substrate where the first and second flow channels are provided. The third through-hole communicates with the first flow channel, and the fourth through-hole communicates with the second flow channel. The third through-hole is used for distributing the electrolyte in the first flow channel to multiple fuel cell stack units, and the fourth through-hole is used for guiding the electrolyte flowing through the multiple fuel cell stack units back into the second flow channel. The liquid distribution end plate according to the embodiments of this application has at least the following beneficial effects: by directly integrating the first flow channel and the second flow channel on the substrate, compared with the traditional liquid distribution end plate, there is no need to set an additional coil as a flow channel, thereby eliminating the use of the coil, reducing the production cost of the liquid distribution end plate of this application, and the elimination of the coil also reduces the space occupied by the liquid distribution end plate, thereby reducing the required space cost. The first through hole and the second through hole facilitate the flow of electrolyte into the first flow channel and out of the second flow channel. The third through hole facilitates the uniform distribution of electrolyte in the flow channel to multiple battery stack units. The fourth through hole facilitates the return of electrolyte waste liquid flowing through multiple battery stack units to the second flow channel, and then out through the second through hole, so as to realize the liquid distribution operation of the liquid distribution end plate.
[0005] According to some embodiments of this application, a base plate is also included, which covers one side of the substrate where the first flow channel and the second flow channel are provided. The base plate is provided with a fifth through hole that matches the third through hole, and the base plate is also provided with a sixth through hole that matches the fourth through hole.
[0006] According to some embodiments of this application, a sealing gasket is also included, wherein the sealing gasket is provided with a first strip-shaped opening that matches the first flow channel, the sealing gasket is also provided with a second strip-shaped opening that matches the second flow channel, the sealing gasket is also provided with a seventh through hole that matches the third through hole, and the sealing gasket is also provided with an eighth through hole that matches the fourth through hole, and the sealing gasket is disposed between the substrate and the bottom plate.
[0007] According to some embodiments of this application, the substrate has a plurality of connection holes around the perimeter of the first flow channel side, and the plurality of connection holes are used for fixed connection with the clamping plate of the fuel cell unit.
[0008] According to some embodiments of this application, the corners of the first flow channel and the second flow channel are both rounded corners.
[0009] According to some embodiments of this application, both the first flow channel and the second flow channel are serpentine flow channels.
[0010] According to some embodiments of this application, the substrate is an acid and alkali resistant engineering plastic board.
[0011] According to some embodiments of this application, the sealing gasket is an acid and alkali resistant rubber gasket.
[0012] According to some embodiments of this application, the bottom plate is provided with a third flow channel and a fourth flow channel on the side near the sealing gasket. The first flow channel and the third flow channel are mirror-symmetrical about the sealing gasket, and the second flow channel and the fourth flow channel are mirror-symmetrical about the sealing gasket.
[0013] The flow battery system according to a second aspect embodiment of this application includes: The liquid dispensing end plate of the first aspect of this application.
[0014] The flow battery system according to the embodiments of this application has at least the following beneficial effects: By directly integrating the first flow channel and the second flow channel on the substrate, compared with the traditional liquid distribution end plate, it is not necessary to set up a coil as a flow channel, thereby eliminating the use of the coil, reducing the production cost of the liquid distribution end plate of this application, and the elimination of the coil also reduces the space occupied by the liquid distribution end plate, thereby reducing the required space cost. By setting the first through hole and the second through hole, the electrolyte can flow into the first flow channel and out of the second flow channel. By setting the third through hole, the electrolyte in the flow channel can be evenly distributed to multiple stack units. By setting the fourth through hole, the electrolyte waste liquid flowing through multiple stack units can be flowed back to the second flow channel and then flowed out through the second through hole to realize the liquid distribution operation of the liquid distribution end plate. By using the liquid distribution end plate of this application, the space cost and material cost required for the flow battery system of this application are reduced.
[0015] Additional aspects and advantages of this application 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 this application. Attached Figure Description
[0016] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the liquid distribution end plate according to an embodiment of this application; Figure 2 for Figure 1 A schematic diagram showing another perspective of the liquid distribution end plate; Figure 3 for Figure 1 A schematic diagram of a cross-sectional view of the liquid separator plate shown; Figure 4 This is a schematic diagram showing the assembly positions of the clamping plate, substrate, sealing gasket, and base plate in an embodiment of this application.
[0017] Figure label: Substrate 100; First flow channel 101; Second flow channel 102; First through hole 103; Second through hole 104; Third through hole 105; Fourth through hole 106; Connecting hole 107; Base plate 110; Fifth through hole 111; Sixth through hole 112; Sealing gasket 120; First strip-shaped through hole 121; Second strip-shaped through hole 122; Seventh through hole 123; Eighth through hole 124; Clamping plate 130. Detailed Implementation
[0018] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0019] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0020] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0021] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.
[0022] Currently, traditional flow batteries use a centralized liquid inlet and outlet configuration of "parallel main pipe + branch pipe", which requires a large number of coils, increasing production costs. At the same time, the arrangement of multiple coils also requires a large space, resulting in higher space costs.
[0023] Based on this, this application proposes a liquid distribution end plate and a flow battery system, which directly integrates a flow channel for the electrolyte to flow on the liquid distribution end plate, replacing the coil and thus eliminating the need for the coil, saving production costs. Moreover, since the flow channel is integrated on the surface of the liquid distribution end plate, the required space is also small, thereby saving space costs.
[0024] It is understood that the liquid distribution end plate of this application includes a substrate 100. A first flow channel 101 and a second flow channel 102 are provided on one side of the substrate 100. A first through hole 103 and a second through hole 104 are provided on the periphery of the substrate 100. The first through hole 103 communicates with the first flow channel 101, and the second through hole 104 communicates with the second flow channel 102. The first through hole 103 is used to input positive or negative electrolyte, and the second through hole 104 is used to output negative or positive electrolyte. A third through hole 105 and a fourth through hole 106 are also provided on both sides of the substrate 100 where the first flow channel 101 and the second flow channel 102 are provided. The third through hole 105 communicates with the first flow channel 101, and the fourth through hole 106 communicates with the second flow channel 102. The third through hole 105 is used to distribute the electrolyte in the first flow channel 101 to multiple fuel cell stack units, and the fourth through hole 106 is used to guide the electrolyte flowing through the multiple fuel cell stack units back into the second flow channel 102.
[0025] The beneficial effects of the liquid distribution end plate of this application embodiment can be manifested as follows: by directly integrating the first flow channel 101 and the second flow channel 102 on the substrate 100, compared with the traditional liquid distribution end plate, there is no need to set an additional coil as a flow channel, thereby saving the use of the coil, reducing the production cost of the liquid distribution end plate of this application, and the elimination of the coil also reduces the space occupied by the liquid distribution end plate, thereby reducing the required space cost. By setting the first through hole 103 and the second through hole 104, the electrolyte can flow into the first flow channel 101 and out of the second flow channel 102. By setting the third through hole 105, the electrolyte in the flow channel can be evenly distributed to multiple fuel cell stack units to realize the liquid distribution operation of the liquid distribution end plate. By setting the fourth through hole 106, the electrolyte waste liquid flowing through multiple fuel cell stack units can be flowed back to the second flow channel 102, and then flowed out through the second through hole 104 for collection and treatment.
[0026] For example, in some embodiments, reference is made to Figure 1 , Figure 2 and Figure 3In this embodiment, the first flow channel 101 and the second flow channel 102 are both integrated on the same side of the substrate 100. The first flow channel 101 can be used as a positive electrode flow channel, and the second flow channel 102 can be used as a negative electrode flow channel. The integration of the first flow channel 101 and the second flow channel 102 realizes an integrated design, thereby replacing the traditional coil design, and achieving a high degree of integration between the coil and the fuel cell stack unit. This optimizes the piping system and reduces the use of coils, thereby reducing costs. At the same time, the integrated design also allows for a longer ion transport path between different modules, thereby increasing the ion resistance of the main pipeline, reducing bypass current, reducing energy loss, and improving coulombic efficiency. The substrate 100 has a first through hole 103 and a second through hole 104 on its periphery. The first through hole 103 corresponds to and communicates with the first flow channel 101, and the second through hole 104 communicates with the second flow channel 102. The electrolyte is connected to the first flow channel 101 and flows out through the second flow channel 102. Multiple third through holes 105 and fourth through holes 106 are provided, each located on the side of the base 100 where the first flow channel 101 is located. The multiple third through holes 105 are connected to the first flow channel 101 and correspond one-to-one with multiple fuel cell stack units, allowing the electrolyte in the first flow channel 101 to be evenly distributed to each fuel cell stack unit through the multiple third through holes 105. Multiple fourth through holes 106 are connected to the second flow channel 102 and correspond one-to-one with multiple fuel cell stack units, allowing the electrolyte distributed to each fuel cell stack unit to flow back to the second flow channel 102 through the fourth through holes 106, and then flow out through the second through hole 104, thereby realizing the liquid distribution operation of the liquid distribution end plate of this application.
[0027] Furthermore, in some embodiments, the ion loops between fuel cell units can lead to the generation of bypass currents, resulting in a decrease in coulombic efficiency. Existing technologies typically address this problem by lengthening the pipes, reducing the pipe diameter, or adding insulating valves. However, these measures also introduce new problems such as increased flow resistance and system complexity. The first flow channel 101 and the second flow channel 102 integrated into the substrate 100 in this application include one or more of the following flow patterns: serpentine flow, interdigitated flow, and parallel flow. This further extends the path of the first flow channel 101 and the second flow channel 102 within a smaller space, thus extending the ion transport path. Since the ion resistance is proportional to the transport path, the ion resistance of the main flow channel is increased. The increase in the ion resistance of the main flow channel suppresses the generation of bypass currents, thereby reducing energy loss and improving coulombic efficiency without introducing new technical problems as in the prior art.
[0028] It should be noted that: generally, the depth of the first flow channel 101 and the second flow channel 102 is between 5-50 mm, and the width of the first flow channel 101 and the second flow channel 102 is between 10-50 mm. One first flow channel 101 and one second flow channel 102 constitute a group, and multiple groups of first flow channels 101 and second flow channels 102 can be combined on the substrate 100. The depth, width, and number of the first flow channels 101 and the second flow channels 102 are determined based on the pipe diameter and the thickness of the substrate 100 in actual engineering applications, and can be adjusted accordingly. The first flow channels 101 and the second flow channels 102 can be arranged longitudinally or laterally on the substrate 100.
[0029] It is understood that the liquid distribution end plate of this application also includes a base plate 110, which covers the side of the substrate 100 where the first flow channel 101 and the second flow channel are provided. The base plate 110 is provided with a fifth through hole 111 that matches the third through hole 105, and the base plate 110 is also provided with a sixth through hole 112 that matches the fourth through hole 106.
[0030] For example, in some embodiments, reference is made to Figure 4 In this embodiment, a plurality of fifth through holes 111 and sixth through holes 112 are provided on the bottom. The plurality of fifth through holes 111 correspond one-to-one with a plurality of third through holes 105, so that the electrolyte in the first flow channel 101 can flow sequentially through the third through holes 105 and the fifth through holes 111 to each fuel cell stack unit. The plurality of sixth through holes 112 correspond one-to-one with a plurality of fourth through holes 106, so that the electrolyte flowing through each fuel cell stack unit can flow sequentially through the sixth through holes 112 and the fourth through holes 106 back into the second flow channel 102. The bottom plate 110 covers the side of the substrate 100 where the first flow channel 101 is provided to prevent the electrolyte in the first flow channel 101 and the second flow channel 102 from leaking out, thereby causing unnecessary safety hazards. The number of fifth through holes 111 is twice that of third through holes 105, and the number of sixth through holes 112 is twice that of fourth through holes 106. This means that when the base plate 110 is placed directly on the side of the base 100 where the first flow channel 101 is provided, there is no need to consider the orientation of the base plate 110. In this way, the multiple fifth through holes 111 correspond one-to-one with the multiple third through holes 105, and the multiple sixth through holes 112 correspond one-to-one with the multiple fourth through holes, thereby improving the installation efficiency of the base plate 110 and the base 100.
[0031] It is understood that the liquid distribution end plate of this application also includes a sealing gasket 120. The sealing gasket 120 is provided with a first strip-shaped opening 121 that matches the first flow channel 101, a second strip-shaped opening 122 that matches the second flow channel 102, a seventh through hole 123 that matches the third through hole 105, and an eighth through hole 124 that matches the fourth through hole 106. The sealing gasket 120 is disposed between the substrate 100 and the bottom plate 110.
[0032] For example, in some embodiments, reference is made to Figure 4 In this embodiment, the sealing gasket 120 is filled between the substrate 100 and the bottom plate 110. The sealing gasket 120 is provided with a plurality of seventh through holes 123, which correspond one-to-one with a plurality of third through holes 105, so that the electrolyte in the first flow channel 101 can flow to each fuel cell unit in sequence through the third through hole 105, the seventh through hole 123 and the fifth through hole 111. A plurality of eighth through holes 124 correspond one-to-one with a plurality of fourth through holes 106, so that the electrolyte flowing through each fuel cell unit can flow back to the second flow channel 102 in sequence through the sixth through hole 112, the eighth through hole 124 and the fourth through hole 106. The sealing gasket 120 is designed to further prevent the leakage of electrolyte in the first flow channel 101 and the second flow channel 102, and further avoid unnecessary safety hazards. The first strip-shaped through hole 121 and the second strip-shaped through hole 122 increase the depth of the first flow channel 101 and the second flow channel 102 to a certain extent.
[0033] It is understood that the substrate 100 has multiple connection holes 107 around the side where the first flow channel 101 is located, and the multiple connection holes 107 are used for fixed connection with the clamping plate 130 of the fuel cell unit.
[0034] For example, in some embodiments, reference is made to Figure 2 and Figure 3 In this embodiment, multiple connection holes 107 are distributed around the first flow channel 101 and the second flow channel 102. The substrate 100 can be fixedly connected to the clamping plate 130 of the fuel cell unit through the multiple connection holes 107 by bolt structure, so that the substrate 100 is not easy to detach from the fuel cell unit, thus ensuring the stable operation of the liquid separation process.
[0035] It is understandable that the corners of the first flow channel 101 and the second flow channel 102 are both rounded corners.
[0036] For example, in some embodiments, reference is made to Figure 4 In this embodiment, the corners of the first flow channel 101 and the second flow channel 102 are both set as arc-shaped corners. Compared with the traditional double right-angle corners, the arc-shaped corner design can reduce local losses during electrolyte flow and further reduce the electrolyte loss rate.
[0037] It is understandable that both the first flow channel 101 and the second flow channel 102 are serpentine flow channels.
[0038] For example, in this embodiment, both the first flow channel 101 and the second flow channel 102 are configured as serpentine flow channels. Compared with other flow channel shapes, the serpentine flow channel configuration makes the paths of the first flow channel 101 and the second flow channel 102 the longest within the same range, thereby further extending the ion transport path, increasing the ion resistance of the main flow channel, better suppressing the generation of bypass current, and further reducing energy loss and improving coulombic efficiency.
[0039] It is understandable that the substrate 100 is an acid and alkali resistant engineering plastic board.
[0040] For example, in some embodiments, the substrate 100 is configured as an acid and alkali resistant engineering plastic plate to resist the strong corrosiveness of the electrolyte, thereby avoiding the risk of the substrate 100 being dissolved and contaminating the electrolyte, and also promoting the stable operation of the liquid separation process. In addition, the acid and alkali resistant engineering plastic material has a low cost, which can further reduce the production cost. The acid and alkali resistant engineering plastic plate can be one of the following materials: PP (polypropylene), PVC (polyvinyl chloride), PVDF (polyvinylidene fluoride), PPH (homopolymer polypropylene).
[0041] It is understandable that the sealing gasket 120 is an acid and alkali resistant rubber gasket.
[0042] For example, in some embodiments, the sealing gasket 120 is set as an acid and alkali resistant rubber gasket to resist the strong corrosiveness of the electrolyte, thereby avoiding the risk of the sealing gasket 120 being dissolved and contaminating the electrolyte, and also ensuring the stability of the seal between the base 100 and the bottom. Moreover, the acid and alkali resistant rubber material has a low cost, which can further reduce the production cost. The acid and alkali resistant rubber gasket can be one of the materials such as EPDM (ethylene propylene diene monomer rubber) and FPM (fluororubber).
[0043] It is understandable that the bottom plate 110 is provided with a third flow channel and a fourth flow channel on the side near the sealing gasket 120. The first flow channel 101 and the third flow channel are mirror symmetrical about the sealing gasket 120, and the second flow channel 102 and the fourth flow channel are mirror symmetrical about the sealing gasket 120.
[0044] For example, in some embodiments, the base plate 110 is provided with a third flow channel and a fourth flow channel. The third flow channel is mirror-symmetrical to the first flow channel 101 with the sealing gasket 120 as the plane of symmetry, so that the electrolyte can flow between the first flow channel 101 and the third flow channel. This increases the depth of the first flow channel 101 with the cooperation of the third flow channel. The fourth flow channel is mirror-symmetrical to the second flow channel 102 with the sealing gasket 120 as the plane of symmetry, so that the electrolyte can flow between the second flow channel 102 and the fourth flow channel. This increases the depth of the second flow channel 102 with the cooperation of the fourth flow channel, reduces the resistance to electrolyte flow, and thus adapts to scenarios requiring a large flow rate, thereby improving the application range of the liquid distribution end plate of this application.
[0045] The flow battery system according to the second aspect of the application includes the liquid distribution end plate of the first aspect of the application described above.
[0046] According to the flow battery system of this application embodiment, the first flow channel 101 and the second flow channel 102 are directly integrated on the substrate 100. Compared with the traditional liquid distribution end plate, there is no need to set up a coil as a flow channel, thereby eliminating the use of the coil and reducing the production cost of the liquid distribution end plate of this application. The elimination of the coil also reduces the space occupied by the liquid distribution end plate, thereby reducing the required space cost. The first through hole 103 and the second through hole 104 are provided to facilitate the flow of electrolyte into the first flow channel 101 and out of the second flow channel 102. The third through hole 105 is provided to facilitate the uniform distribution of electrolyte in the flow channel to multiple stack units. The fourth through hole 106 is provided to facilitate the return of electrolyte waste liquid flowing through multiple stack units to the second flow channel 102 and then out through the second through hole 104 to realize the liquid distribution operation of the liquid distribution end plate. By using the liquid distribution end plate of this application, the space cost and material cost required for the flow battery system of this application are reduced.
[0047] Since the flow battery system includes the liquid distribution end plate of the first aspect embodiment, the corresponding contents of the liquid distribution end plate in the first aspect embodiment can be applied to the flow battery system of the second aspect, and have the same implementation principle and technical effect. To avoid redundancy, it will not be described in detail here.
[0048] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.
Claims
1. A liquid separation end plate, characterized in that, include: A substrate has a first flow channel and a second flow channel on one side, and a first through hole and a second through hole on the periphery of the substrate. The first through hole communicates with the first flow channel, and the second through hole communicates with the second flow channel. The first through hole is used to input positive or negative electrolyte, and the second through hole is used to output negative or positive electrolyte. The substrate also has a third through hole and a fourth through hole on both sides of the first and second flow channels. The third through hole communicates with the first flow channel, and the fourth through hole communicates with the second flow channel. The third through hole is used to distribute the electrolyte in the first flow channel to multiple fuel cell stack units, and the fourth through hole is used to guide the electrolyte flowing through the multiple fuel cell stack units back into the second flow channel.
2. The liquid distribution end plate according to claim 1, characterized in that, It also includes a base plate, which covers the side of the substrate where the first flow channel and the second flow channel are provided. The base plate is provided with a fifth through hole that matches the third through hole, and the base plate is also provided with a sixth through hole that matches the fourth through hole.
3. The liquid distribution end plate according to claim 2, characterized in that, It also includes a sealing gasket, which has a first strip-shaped opening that matches the first flow channel, a second strip-shaped opening that matches the second flow channel, a seventh through hole that matches the third through hole, and an eighth through hole that matches the fourth through hole. The sealing gasket is disposed between the substrate and the bottom plate.
4. The liquid distribution end plate according to claim 1, characterized in that, The substrate has multiple connection holes around one side of the first flow channel, and the multiple connection holes are used for fixed connection with the clamping plate of the fuel cell unit.
5. The liquid distribution end plate according to claim 1, characterized in that, Both the first flow channel and the second flow channel have rounded corners.
6. The liquid distribution end plate according to claim 1, characterized in that, Both the first flow channel and the second flow channel are serpentine flow channels.
7. The liquid distribution end plate according to claim 1, characterized in that, The substrate is an acid and alkali resistant engineering plastic board.
8. The liquid distribution end plate according to claim 3, characterized in that, The sealing gasket is an acid and alkali resistant rubber gasket.
9. The liquid distribution end plate according to claim 3, characterized in that, The base plate has a third flow channel and a fourth flow channel on the side near the sealing gasket. The first flow channel and the third flow channel are mirror-symmetrical about the sealing gasket, and the second flow channel and the fourth flow channel are mirror-symmetrical about the sealing gasket.
10. A flow battery system, characterized in that, include: The liquid dispensing end plate according to any one of claims 1 to 9.