Flow frame structure and flow battery

Abstract

The utility model provides a kind of liquid flow frame structure and liquid flow battery, belong to chemical energy storage battery technical field.Liquid flow frame structure includes electrode frame, flow channel plate and positioning structure, electrode frame includes frame body and the first limit plate and second limit plate of being arranged in frame body inside.In flow channel plate is assembled on electrode frame, only need to be inserted with the corresponding third insertion limit structure of flow channel plate on each first insertion limit structure of first limit plate and be inserted with the corresponding fourth insertion limit structure of flow channel plate on each second insertion limit structure of second limit plate, without using conductive glue to be bonded and fixed on bipolar plate flow channel plate can be stably installed on electrode frame, fully guarantee that the position of each part of flow channel plate will not produce deviation, not only can realize the quick positioning installation between flow channel plate and electrode frame, reduce the production cost of liquid flow battery stack, but also can reduce the contact resistance between flow channel plate and bipolar plate, improve the performance of liquid flow battery stack.

Description

Technical Field

[0001] This utility model belongs to the field of chemical energy storage battery technology, and in particular, relates to a flow frame structure and a flow battery. Background Technology

[0002] Flow batteries, as a novel battery technology, have gained widespread attention due to their advantages such as high efficiency, safety, reliability, long cycle life, and flexible structural design. A flow battery mainly consists of an electrochemical reactor stack (composed of multiple individual cells connected in series) and a storage tank for storing the positive and negative electrode electrolytes.

[0003] Currently, in electrochemical reactor stacks, the cut flow channel plates are often difficult to securely mount on the electrode frame due to their unique shape. To prevent the flow channel plates from shifting relative to the electrode frame, a prefabricated tooling is typically used. The flow channel plates are first fixed to the bipolar plates with conductive adhesive, and then the bipolar plates are installed on the electrode frame. However, because the flow channel plates require prefabrication and are fixed to the bipolar plates with conductive adhesive, this not only increases the assembly time of the flow battery stack due to additional production steps, but also raises the production cost of the flow battery stack due to the high cost of conductive adhesive. Furthermore, it can easily increase the contact resistance between the flow channel plates and the bipolar plates, leading to a decrease in the performance of the flow battery stack. Utility Model Content

[0004] Based on the above-mentioned problems in the prior art, the purpose of this utility model embodiment is to provide a flow frame structure to solve the problems in the prior art where the flow plate is prefabricated and fixed to the bipolar plate with conductive adhesive, which makes it impossible to achieve rapid positioning and installation of the flow plate and the electrode frame, increases the production cost of the flow battery stack, and increases the contact resistance between the flow plate and the bipolar plate.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a fluid flow frame structure, comprising: An electrode frame includes a frame body and a first limiting plate and a second limiting plate disposed inside the frame body; A flow channel plate is disposed on the electrode frame and positioned between the first limiting plate and the second limiting plate; and The positioning structure includes a plurality of first insertion limiting structures disposed on the first limiting plate, a plurality of second insertion limiting structures disposed on the second limiting plate, a plurality of third insertion limiting structures disposed on the side of the flow channel plate near the first limiting plate, and a plurality of fourth insertion limiting structures disposed on the side of the flow channel plate near the second limiting plate. The first insertion limiting structures and the third insertion limiting structures are arranged in a one-to-one correspondence, and each first insertion limiting structure can be inserted and cooperated with the corresponding third insertion limiting structure to limit the flow channel plate on the electrode frame. The second insertion limiting structures and the fourth insertion limiting structures are arranged in a one-to-one correspondence, and each second insertion limiting structure can be inserted and cooperated with the corresponding fourth insertion limiting structure to limit the flow channel plate on the electrode frame.

[0006] Further, the first and second insertion limiting structures are insertion teeth, and the third and fourth insertion limiting structures are tooth grooves adapted to the insertion teeth; or, the first insertion limiting structure is an insertion tooth, the third insertion limiting structure is a tooth groove adapted to the insertion tooth, the second insertion limiting structure is a tooth groove, and the fourth insertion limiting structure is an insertion tooth adapted to the tooth groove; or, the first insertion limiting structure is a tooth groove, the third insertion limiting structure is an insertion tooth adapted to the tooth groove, the third insertion limiting structure is an insertion tooth, and the fourth insertion limiting structure is a tooth groove adapted to the insertion tooth; or, the first and second insertion limiting structures are tooth grooves, and the third and fourth insertion limiting structures are insertion teeth adapted to the tooth groove.

[0007] Furthermore, the fluid flow frame structure also includes a bipolar plate and a positioning element. The electrode frame is provided with a first positioning hole, and the bipolar plate is provided with a second positioning hole at the position corresponding to the first positioning hole. The positioning element is inserted into the first positioning hole and the second positioning hole to position the bipolar plate on the electrode frame.

[0008] Furthermore, when the bipolar plate is positioned in the electrode frame, the bipolar plate can directly contact the flow channel plate.

[0009] Furthermore, the fluid flow frame structure also includes a sheet-like carbon material disposed on the electrode frame and covering the flow channel plate, a flow channel cover plate disposed on the first limiting plate and the second limiting plate, and a diaphragm disposed on the electrode frame.

[0010] Furthermore, the first insertion limiting structure and / or the second insertion limiting structure are spaced apart along the length direction of the flow channel plate.

[0011] Furthermore, the distance between two adjacent first insertion limiting structures is equal, and the distance between two adjacent second insertion limiting structures is equal.

[0012] Furthermore, the distance between two adjacent first insertion limiting structures is equal to the distance between two adjacent second insertion limiting structures, and the first insertion limiting structures and the second insertion limiting structures are staggered.

[0013] Furthermore, the thickness of the first insertion limiting structure and / or the second insertion limiting structure is less than the thickness of the flow channel plate.

[0014] In view of the above-mentioned problems in the prior art, another objective of this utility model is to provide a flow battery to solve the problems in the prior art that use prefabricated flow channel plate tooling and bond the flow channel plate to the bipolar plate with conductive adhesive, which cannot quickly achieve rapid positioning and installation of the flow channel plate and the electrode frame, increases the production cost of the flow battery stack, and increases the contact resistance between the flow channel plate and the bipolar plate.

[0015] To achieve the above objectives, the technical solution adopted by this utility model is to provide a flow battery, including the flow frame structure in any of the above solutions.

[0016] Compared with the prior art, one or more technical solutions in the embodiments of this utility model have at least one of the following beneficial effects: In this embodiment of the present invention, the flow frame structure and flow battery, when assembling the flow channel plate onto the electrode frame, use a first limiting plate and a second limiting plate to hold and position the flow channel plate against the electrode frame. Simultaneously, each first insertion limiting structure on the first limiting plate engages with a corresponding third insertion limiting structure on the flow channel plate, and each second insertion limiting structure on the second limiting plate engages with a corresponding fourth insertion limiting structure on the flow channel plate. This eliminates the need for conductive adhesive to bond and fix the flow channel plate to the bipolar plate, allowing for a stable installation of the flow channel plate onto the electrode frame. This ensures that the positions of all parts of the flow channel plate do not shift. This not only enables rapid positioning and installation between the flow channel plate and the electrode frame, greatly improving production efficiency and reducing the production cost of the flow battery stack, but also significantly reduces the contact resistance between the flow channel plate and the bipolar plate, improving the performance of the flow battery stack. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A three-dimensional structural diagram of the fluid flow frame structure provided in the embodiment of this utility model; Figure 2 A top view of the fluid flow frame structure provided in this embodiment of the utility model; Figure 3 for Figure 2 A partially enlarged structural diagram; Figure 4 An assembly drawing of the electrode frame and flow channel plate provided for an embodiment of this utility model; Figure 5 An exploded view of the electrode frame and flow channel plate provided in an embodiment of this utility model; Figure 6 Assembly diagram of the fluid flow frame structure and sheet-like carbon material provided in the embodiments of this utility model; Figure 7 An assembly drawing of the fluid flow frame structure and bipolar plate provided for an embodiment of this utility model; Figure 8 An exploded view of the fluid flow frame structure provided in an embodiment of this utility model.

[0019] The following are the labeling elements in the figure: 1-Electrode frame; 11-Frame body; 111-First positioning hole; 12-First limiting plate; 13-Second limiting plate; 14-Frame opening; 15-Flow channel through hole; 2-Flow channel plate; 3-Positioning structure; 31-First insertion limiting structure; 32-Third insertion limiting structure; 33-Second insertion limiting structure; 34-Fourth insertion limiting structure; 4-Bipolar plate; 41-Second positioning hole; 5-Positioning component; 6-Flake carbon material; 7-Flow channel cover; 8-Diaphragm. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] It should be noted that when an element is referred to as "connected to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to or indirectly connected to the other element. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Throughout this specification, reference to "an embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appear in various places throughout the specification, and not all refer to the same embodiment. Furthermore, in one or more embodiments, particular features, structures, or characteristics may be combined in any suitable manner.

[0023] Please refer to the following: Figures 1 to 8 The fluid flow frame structure provided in the embodiments of this utility model will now be described. Please refer to the following for further details. Figure 2 , Figure 3 and Figure 5The fluid flow frame structure provided in this embodiment of the utility model includes an electrode frame 1, a flow channel plate 2, and a positioning structure 3. The electrode frame 1 includes a frame body 11 and a first limiting plate 12 and a second limiting plate 13 disposed inside the frame body 11. The flow channel plate 2 is disposed in the frame opening 14 on the electrode frame 1. The first limiting plate 12 and the second limiting plate 13 are located on both sides of the length direction of the flow channel plate 2, and the flow channel plate 2 is positioned between the first limiting plate 12 and the second limiting plate 13. The positioning structure 3 includes a plurality of first insertion limiting structures 31 disposed on the first limiting plate 12, a plurality of second insertion limiting structures 33 disposed on the second limiting plate 13, a plurality of third insertion limiting structures 32 disposed on the side of the flow channel plate 2 near the first limiting plate 12, and a plurality of fourth insertion limiting structures 34 disposed on the side of the flow channel plate 2 near the second limiting plate 13. The first insertion limiting structures 31 and the third insertion limiting structures 32 are arranged in a one-to-one correspondence. Each first insertion limiting structure 31 can be inserted and cooperated with the corresponding third insertion limiting structure 32 to limit the flow channel plate 2 on the electrode frame 1. The second insertion limiting structures 33 and the fourth insertion limiting structures 34 are arranged in a one-to-one correspondence. Each second insertion limiting structure 33 can be inserted and cooperated with the corresponding fourth insertion limiting structure 34 to limit the flow channel plate 2 on the electrode frame 1.

[0024] Compared with the prior art, the flow frame structure provided in this embodiment of the utility model, when assembling the flow channel plate 2 onto the electrode frame 1, uses the first limiting plate 12 and the second limiting plate 13 to hold and position the flow channel plate 2 against the electrode frame 1. At the same time, the first insertion limiting structures 31 on the first limiting plate 12 are inserted and engaged with the corresponding third insertion limiting structures 32 on the flow channel plate 2, and the second insertion limiting structures 33 on the second limiting plate 13 are inserted and engaged with the corresponding fourth insertion limiting structures 34 on the flow channel plate 2. Without the need to use conductive adhesive to bond and fix the flow channel plate 2 to the bipolar plate 4, the flow channel plate 2 can be stably installed on the electrode frame 1, ensuring that the position of each part of the flow channel plate 2 will not shift. This not only enables rapid positioning and installation between the flow channel plate 2 and the electrode frame 1, greatly improving production efficiency and reducing the production cost of the flow battery stack, but also significantly reduces the contact resistance between the flow channel plate 2 and the bipolar plate 4, improving the performance of the flow battery stack.

[0025] Please refer to the following: Figure 3 , Figure 4 and Figure 5In some embodiments, the first insertion limiting structure 31 and the second insertion limiting structure 33 are insertion teeth, and the third insertion limiting structure 32 and the fourth insertion limiting structure 34 are toothed grooves adapted to the insertion teeth. By simply inserting the insertion teeth on the first limiting plate 12 and the second limiting plate 13 into the corresponding toothed grooves on the flow channel plate 2, the flow channel plate 2 can be stably installed on the electrode frame 1 without the need to use conductive adhesive to bond and fix it to the bipolar plate 4. This ensures that the position of each part of the flow channel plate 2 will not be offset, thereby achieving rapid positioning and installation between the flow channel plate 2 and the electrode frame 1, and significantly reducing the contact resistance between the flow channel plate 2 and the bipolar plate 4.

[0026] Understandably, in some other embodiments, when the first insertion limiting structure 31 is a tooth and the second insertion limiting structure 33 is a groove, the third insertion limiting structure 32 corresponds to a groove that matches the tooth, and the fourth insertion limiting structure 34 corresponds to a tooth that matches the groove. By simply inserting each tooth on the first limiting plate 12 into the corresponding groove on the flow channel plate 2, and by simply inserting each tooth on the flow channel plate 2 into the corresponding groove on the second limiting plate 13, the flow channel plate 2 can be stably installed on the electrode frame 1 without using conductive adhesive to bond and fix it to the bipolar plate 4. This ensures that the position of each part of the flow channel plate 2 will not shift, thereby achieving rapid positioning and installation between the flow channel plate 2 and the electrode frame 1, and significantly reducing the contact resistance between the flow channel plate 2 and the bipolar plate 4.

[0027] Understandably, in some other embodiments, when the first insertion limiting structure 31 is a groove and the second insertion limiting structure 33 is a tooth, the third insertion limiting structure 32 corresponds to a tooth adapted to the groove, and the fourth insertion limiting structure 34 corresponds to a groove adapted to the tooth. Only by inserting each tooth on the second limiting plate 13 into the corresponding groove on the flow channel plate 2, and only by inserting each tooth on the flow channel plate 2 into the corresponding groove on the first limiting plate 12, the flow channel plate 2 can be stably installed on the electrode frame 1 without using conductive adhesive to bond and fix it to the bipolar plate 4. This ensures that the positions of each part of the flow channel plate 2 will not shift, thereby achieving rapid positioning and installation between the flow channel plate 2 and the electrode frame 1, and significantly reducing the contact resistance between the flow channel plate 2 and the bipolar plate 4.

[0028] Understandably, in some other embodiments, the first insertion limiting structure 31 and the second insertion limiting structure 33 are toothed grooves, and the third insertion limiting structure 32 and the fourth insertion limiting structure 34 are corresponding insertion teeth adapted to the toothed grooves. By simply inserting the insertion teeth on the flow channel plate 2 into the corresponding toothed grooves on the first limiting plate 12 and the second limiting plate 13, the flow channel plate 2 can be securely installed on the electrode frame 1 without the need for adhesive bonding to the bipolar plate 4. This ensures that the positions of each part of the flow channel plate 2 do not shift, thereby achieving rapid positioning and installation between the flow channel plate 2 and the electrode frame 1, and significantly reducing the contact resistance between the flow channel plate 2 and the bipolar plate 4.

[0029] It should be noted that the first insertion limiting structure 31, the second insertion limiting structure 33, the third insertion limiting structure 32 and the fourth insertion limiting structure 34 are not limited to the tooth and groove structure that can be inserted and matched with each other. They can also be other similar structures that can realize the flow channel plate 2 and the first limiting plate 12 and the second limiting plate 13 to form a concave and convex structure to achieve a fixing function.

[0030] Please refer to the following: Figure 1 , Figure 7 and Figure 8 In some embodiments, the fluid flow frame structure further includes a bipolar plate 4 and a positioning element 5. The positioning element 5 may be, but is not limited to, a positioning pin. The electrode frame 1 is provided with a first positioning hole 111 into which the positioning element 5 can be inserted. The bipolar plate 4 is provided with a second positioning hole 41 at a position corresponding to the first positioning hole 111. When the positioning element 5 is inserted into the first positioning hole 111 and the second positioning hole 41, the bipolar plate 4 can be positioned on the electrode frame 1 by insertion positioning. It should be noted that there may be multiple first positioning holes 111, and the number of second positioning holes 41 is consistent with the number of first positioning holes 111.

[0031] It should be noted that in some embodiments, when the bipolar plate 4 is positioned on the electrode frame 1, the bipolar plate 4 can directly contact the flow channel plate 2. During the assembly process of the flow battery stack, it is not necessary to pre-bond the bipolar plate 4 and the flow channel plate 2 with conductive adhesive, reducing the pre-fabrication process of the flow channel plate 2 and eliminating the need for conductive adhesive used to fix the flow channel plate 2, thus greatly reducing the production cost of the flow battery stack and improving production efficiency. Furthermore, the contact resistance values ​​between the flow channel plate 2 and the bipolar plate 4 in direct contact and with conductive adhesive were tested: at a pressure of 100N, the contact resistance between the flow channel plate 2 and the bipolar plate 4 connected by conductive adhesive was 10.17mΩ, and the contact resistance between the flow channel plate 2 and the bipolar plate 4 in direct contact was 5.3mΩ. This indicates that this application can significantly reduce the contact resistance between the flow channel plate 2 and the bipolar plate 4, improving the performance of the flow battery stack.

[0032] Please refer to the following: Figure 1 , Figure 6 and Figure 8 In some embodiments, the flow frame structure further includes a sheet-like carbon material 6 disposed on the electrode frame 1 and covering the flow channel plate 2, a flow channel cover plate 7 disposed on the first limiting plate 12 and the second limiting plate 13, and a diaphragm 8 disposed on the electrode frame 1. Specifically, the frame body 11 of the electrode frame 1 is provided with a first positioning hole 111, which is located at the four corners of the frame body 11. The first limiting plate 12 and the second limiting plate 13 are provided with flow channel through holes 15 and flow channels (not shown in the figure) connecting the flow channel through holes 15 and the frame opening 14. The sheet-like carbon material 6 may be, but is not limited to, carbon felt, and the diaphragm 8 may be, but is not limited to, a proton exchange membrane. The sheet-like carbon material 6, the diaphragm 8, the flow channels, and the flow channel cover plate 7 may employ existing technologies.

[0033] Please refer to the following: Figure 2 and Figure 5 In some embodiments, the first insertion limiting structure 31 and / or the second insertion limiting structure 33 are spaced apart along the length direction of the flow channel plate 2, which can further improve the stability of the installation position of the flow channel plate 2 and ensure that the positions of each part of the flow channel plate 2 will not be shifted.

[0034] Please refer to the following: Figure 2 , Figure 4 and Figure 5 In some embodiments, the distance between two adjacent first insertion limiting structures 31 is equal, and the distance between two adjacent second insertion limiting structures 33 is equal. When each of the first insertion limiting structures 31 on the first limiting plate 12 is inserted and matched with the corresponding third insertion limiting structure 32 on the flow channel plate 2, and each of the second insertion limiting structures 33 on the second limiting plate 13 is inserted and matched with the corresponding fourth insertion limiting structure 34 on the flow channel plate 2, the balance of force on each part of the flow channel plate 2 can be enhanced, and deformation or displacement caused by uneven force on each part of the flow channel plate 2 can be avoided, thereby further improving the stability of the installation position of the flow channel plate 2.

[0035] Please refer to the following: Figure 2 , Figure 4 and Figure 5In some embodiments, the distance between two adjacent first insertion limiting structures 31 is equal to the distance between two adjacent second insertion limiting structures 33, and the first insertion limiting structures 31 and the second insertion limiting structures 33 are staggered. When each of the first insertion limiting structures 31 on the first limiting plate 12 is inserted and engaged with the corresponding third insertion limiting structure 32 on the flow channel plate 2, and each of the second insertion limiting structures 33 on the second limiting plate 13 is inserted and engaged with the corresponding fourth insertion limiting structure 34 on the flow channel plate 2, the balance of force on each part of the flow channel plate 2 can be further enhanced, and deformation or displacement caused by uneven force on each part of the flow channel plate 2 can be avoided, thereby further improving the stability of the installation position of the flow channel plate 2.

[0036] Understandably, in some embodiments, the thickness of the first insertion limiting structure 31 and / or the second insertion limiting structure 33 is less than the thickness of the flow channel plate 2, which can ensure that the setting height of the first insertion limiting structure 31 and / or the second insertion limiting structure 32 is lower than the height of the flow channel plate 2, thereby avoiding affecting the compression of the sheet carbon material 6 in the flow battery stack later.

[0037] This utility model embodiment also provides a flow battery, which includes the flow frame structure provided in any of the above embodiments. Since this flow battery possesses all the technical features of the flow frame structure provided in any of the above embodiments, it has the same technical effects as the flow frame structure described above.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fluid flow frame structure, characterized in that, include: An electrode frame includes a frame body and a first limiting plate and a second limiting plate disposed inside the frame body; A flow channel plate is disposed on the electrode frame and positioned between the first limiting plate and the second limiting plate; as well as The positioning structure includes a plurality of first insertion limiting structures disposed on the first limiting plate, a plurality of second insertion limiting structures disposed on the second limiting plate, a plurality of third insertion limiting structures disposed on the side of the flow channel plate near the first limiting plate, and a plurality of fourth insertion limiting structures disposed on the side of the flow channel plate near the second limiting plate. The first insertion limiting structures and the third insertion limiting structures are arranged in a one-to-one correspondence, and each first insertion limiting structure can be inserted and cooperated with the corresponding third insertion limiting structure to limit the flow channel plate on the electrode frame. The second insertion limiting structures and the fourth insertion limiting structures are arranged in a one-to-one correspondence, and each second insertion limiting structure can be inserted and cooperated with the corresponding fourth insertion limiting structure to limit the flow channel plate on the electrode frame.

2. The fluid flow frame structure as described in claim 1, characterized in that, The first and second insertion limiting structures are insertion teeth, and the third and fourth insertion limiting structures are tooth grooves adapted to the insertion teeth; or, the first insertion limiting structure is an insertion tooth, the third insertion limiting structure is a tooth groove adapted to the insertion tooth, the second insertion limiting structure is a tooth groove, and the fourth insertion limiting structure is an insertion tooth adapted to the tooth groove; or, the first insertion limiting structure is a tooth groove, the third insertion limiting structure is an insertion tooth adapted to the tooth groove, the third insertion limiting structure is an insertion tooth, and the fourth insertion limiting structure is a tooth groove adapted to the insertion tooth; or, the first and second insertion limiting structures are tooth grooves, and the third and fourth insertion limiting structures are insertion teeth adapted to the tooth groove.

3. The fluid flow frame structure as described in claim 1, characterized in that, The fluid flow frame structure also includes a bipolar plate and a positioning element. The electrode frame is provided with a first positioning hole, and the bipolar plate is provided with a second positioning hole at the position corresponding to the first positioning hole. The positioning element is inserted into the first positioning hole and the second positioning hole to position the bipolar plate on the electrode frame.

4. The fluid flow frame structure as described in claim 3, characterized in that, When the bipolar plate is positioned in the electrode frame, the bipolar plate can directly contact the flow channel plate.

5. The fluid flow frame structure as described in claim 1, characterized in that, The fluid flow frame structure also includes a sheet-like carbon material disposed on the electrode frame and covering the flow channel plate, a flow channel cover plate disposed on the first limiting plate and the second limiting plate, and a diaphragm disposed on the electrode frame.

6. The fluid flow frame structure as described in claim 1, characterized in that, The first insertion limiting structure and / or the second insertion limiting structure are spaced apart along the length direction of the flow channel plate.

7. The fluid flow frame structure as described in claim 1, characterized in that, The distance between two adjacent first insertion limiting structures is equal, and the distance between two adjacent second insertion limiting structures is equal.

8. The fluid flow frame structure as described in claim 1, characterized in that, The distance between two adjacent first insertion limiting structures is equal to the distance between two adjacent second insertion limiting structures, and the first insertion limiting structures and the second insertion limiting structures are staggered.

9. The fluid flow frame structure according to any one of claims 1 to 8, characterized in that, The thickness of the first insertion limiting structure and / or the second insertion limiting structure is less than the thickness of the flow channel plate.

10. A flow battery, characterized in that, Includes the fluid flow frame structure as described in any one of claims 1 to 9.

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