Electrode frame with fool-proof structure and flow battery stack

Abstract

The utility model provides an electrode frame with fool-proof structure and redox flow battery stack, the electrode frame with fool-proof structure comprises a frame body and fool-proof structure arranged on the frame body, the fool-proof structure comprises a plurality of fool-proof bulges and a plurality of fool-proof holes for the fool-proof bulges to be inserted and matched, and the fool-proof bulges are arranged on the frame body at intervals, so that the fool-proof bulges are not easy to be separated from the fool-proof holes. The fool-proof protrusions are arranged on the frame body, the fool-proof holes are formed in the frame body at intervals, the fool-proof protrusions and the fool-proof holes are arranged in a one-to-one correspondence mode, and when a plurality of electrode frames are assembled in a stacked mode, all that is needed is to align the fool-proof protrusions on one electrode frame with the corresponding fool-proof holes in the other electrode frame. Therefore, the fool-proof protrusions on one electrode frame can be placed into the corresponding fool-proof holes in the other electrode frame, the situation that two adjacent electrode frames are assembled mistakenly under the condition that an operator recognizes and judges the assembling direction mistakenly is effectively prevented, and the fool-proof effect can be achieved. Meanwhile, high-precision positioning assembly of two adjacent electrode frames can be achieved, and dislocation of the electrode frames is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage batteries, and in particular relates to an electrode frame and a flow battery stack with a fool-proof structure. Background Art

[0002] Flow batteries are an emerging type of energy storage battery, and the electrode frame is a key component. It holds, but is not limited to, the electrodes, bipolar plates, and ion-conducting membranes, and can be stacked to form a flow battery stack. During the assembly of a flow battery stack, screws or other external positioning structures are typically used to position and assemble the stacked electrode frames.

[0003] Currently, in the process of stacking and assembling electrode frames manually or by robots, operators are generally required to quickly and accurately determine the assembly direction of the electrode frames. Once the operator makes an error in identifying and judging the assembly direction of the electrode frames, the electrode frames will not be assembled in the prescribed assembly direction. At the very least, rework and reassembly will be required, which will reduce the efficiency of the electrode frame stacking assembly. At worst, the entire liquid flow battery stack will suffer a short circuit failure during the inspection process and be completely scrapped. Utility Model Content

[0004] Based on the above-mentioned problems existing in the prior art, the purpose of the embodiment of the present utility model is to provide an electrode frame with an anti-fool-proof structure to solve the problem in the prior art that operators are prone to make mistakes in identifying and judging the assembly direction of the electrode frame, which not only affects the efficiency of the stacking assembly of the electrode frame, but also makes it difficult to ensure the accuracy of the positioning and assembly of the electrode frame.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide an electrode frame with a fool-proof structure, comprising:

[0006] a frame having an opening; and

[0007] A fool-proof structure provided on the frame, the fool-proof structure comprising a plurality of fool-proof protrusions and a plurality of fool-proof holes for the fool-proof protrusions to be plugged into and matched with, the plurality of fool-proof protrusions being arranged at intervals, the plurality of fool-proof holes being arranged at intervals, and the fool-proof protrusions being arranged in one-to-one correspondence with the fool-proof holes;

[0008] Each fool-proofing protrusion on one electrode frame can be placed in the corresponding fool-proofing hole on the adjacent electrode frame, so that the side of one electrode frame fits with the side of the adjacent electrode frame, and one electrode frame can be positioned on the adjacent electrode frame in the correct assembly direction.

[0009] Further, the anti-fool-proof protrusion is a truncated cone-shaped protrusion, and the anti-fool-proof hole is a truncated cone-shaped hole adapted to the truncated cone-shaped protrusion; or, the anti-fool-proof protrusion is a conical protrusion, and the anti-fool-proof hole is a conical hole adapted to the conical protrusion; or, the anti-fool-proof protrusion is a prism-shaped protrusion, and the anti-fool-proof hole is a prism-shaped hole adapted to the prism-shaped protrusion; or, the anti-fool-proof protrusion is a pyramid-shaped protrusion, and the anti-fool-proof hole is a pyramid-shaped hole adapted to the pyramid-shaped protrusion.

[0010] Furthermore, the fool-proof hole includes a through hole portion located on the frame and a blind hole portion located in the fool-proof protrusion, and the depth of the fool-proof hole is greater than the axial length of the fool-proof protrusion.

[0011] Furthermore, the ratio of the axial length of the fool-proof protrusion to the thickness of the frame is (4-6):1.

[0012] Furthermore, the fool-proof protrusion is a truncated cone-shaped protrusion, and the cone angle α of the truncated cone-shaped protrusion is 30° to 90°.

[0013] Furthermore, the lines connecting the plurality of fool-proof protrusions in sequence can form a polygon, which is an irregular polygon, a convex polygon or a concave polygon; and the fool-proof protrusions on adjacent electrode frames have the same orientation.

[0014] Furthermore, an assembly groove for assembling bipolar plates is provided on one side of the frame where no flow channel is provided.

[0015] Another purpose of an embodiment of the present utility model is to provide a liquid flow battery stack to solve the problem in the prior art that operators are prone to make errors in identifying and judging the assembly direction of the electrode frame, which not only affects the efficiency of the electrode frame stacking assembly, but also makes it difficult to ensure the accuracy of the electrode frame positioning and assembly.

[0016] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a liquid flow battery stack, including a first end plate, a first insulating plate, a first current collecting plate, a second end plate, a second insulating plate, a second current collecting plate and a bipolar plate, and also including an electrode frame with an anti-foolproof structure provided by any of the above embodiments.

[0017] Furthermore, the first end plate is provided with a plurality of first positioning protrusions, the second end plate is provided with a plurality of first positioning holes, the first surface of the first insulating plate is provided with a plurality of second positioning protrusions, the second surface of the first insulating plate is provided with a plurality of first conical holes, the first current collecting plate is provided with a plurality of second conical holes, and the second insulating plate is provided with a plurality of third conical holes; and the second positioning protrusions have the same structure as the anti-fool protrusions on the electrode frame, and the first positioning holes and the second positioning holes have the same structure as the anti-fool holes on the electrode frame; each first positioning protrusion is inserted into the corresponding second positioning hole, and each second positioning protrusion is inserted into the corresponding anti-fool hole on the adjacent electrode frame after passing through the corresponding first conical hole, and each anti-fool protrusion on the electrode frame adjacent to the second current collecting plate passes through the corresponding second conical hole and the corresponding third conical hole in sequence and is inserted into the corresponding first positioning hole.

[0018] Furthermore, the bipolar plates are arranged in assembly grooves on the corresponding electrode frames.

[0019] Compared with the prior art, the one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects:

[0020] The electrode frame with a fool-proof structure in the embodiment of the present invention is provided with a plurality of fool-proof protrusions and a plurality of fool-proof holes on the frame body of the electrode frame. Since the plurality of fool-proof protrusions are arranged at intervals on the frame body, the plurality of fool-proof holes are arranged at intervals on the frame body, and the fool-proof protrusions and the fool-proof holes are arranged in a one-to-one correspondence, when stacking and assembling a plurality of electrode frames, it is only necessary to align the fool-proof protrusions on one electrode frame with the corresponding fool-proof holes on another electrode frame so that the fool-proof protrusions on one electrode frame can be placed in the corresponding fool-proof holes on the other electrode frame. This fully ensures that the two adjacent electrode frames can be positioned and assembled in the correct assembly direction, and effectively prevents the two adjacent electrode frames from being assembled incorrectly when the operator incorrectly identifies and judges the assembly direction, thereby playing a fool-proof role, ensuring the accuracy of the positioning and assembly of the electrode frames, avoiding the need for rework and reassembly due to assembly errors, and thus improving the efficiency of stacking and assembling the electrode frames.

[0021] At the same time, after the anti-mistake protrusions on one electrode frame are completely placed in the corresponding anti-mistake holes on the other electrode frame, the first surface of one electrode frame can be tightly fitted with the second surface of the other electrode frame, and high-precision positioning and assembly of two adjacent electrode frames can be achieved, effectively preventing subsequent electrode frames from being misaligned up and down and causing sealing leakage problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 A schematic diagram of the three-dimensional structure of an electrode frame with a fool-proof structure provided in an embodiment of the present utility model;

[0024] Figure 2 for Figure 1 Schematic diagram of the local enlarged structure of part A in the middle;

[0025] Figure 3 Another schematic diagram of the three-dimensional structure of the electrode frame with a fool-proof structure provided by an embodiment of the utility model;

[0026] Figure 4 for Figure 3 Schematic diagram of the partial enlarged structure of part B in the middle;

[0027] Figure 5 for Figure 3 A schematic top view of the electrode frame with a fool-proof structure is shown in FIG;

[0028] Figure 6 A cross-sectional structural diagram of a plurality of electrode frames stacked and assembled according to an embodiment of the present invention;

[0029] Figure 7 A cross-sectional structural diagram of the fool-proof structure provided by an embodiment of the utility model;

[0030] Figure 8 An exploded view of a flow battery stack provided by an embodiment of the present utility model;

[0031] Figure 9 This is a cross-sectional structural diagram of a flow battery stack provided in an embodiment of the present utility model.

[0032] Among them, the reference numerals in the figures are:

[0033] 1-frame; 11-mouth; 12-assembly slot; 13-electrolyte inlet; 14-electrolyte inlet; 15-electrolyte outlet; 16-electrolyte outlet; 17-inlet main channel; 18-outlet main channel; 19-flare;

[0034] 2- foolproof structure; 21- foolproof protrusion; 22- foolproof hole; 221- through hole; 222- blind hole;

[0035] 3-first end plate; 31-first positioning protrusion;

[0036] 4-first insulating plate; 41-second positioning protrusion; 42-second positioning hole;

[0037] 5-first current collecting plate; 51-first tapered hole;

[0038] 6-second end plate; 61-first positioning hole;

[0039] 7- second insulating plate; 71- third tapered hole;

[0040] 8-second current collecting plate; 81-second tapered hole;

[0041] 9- Bipolar plates. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] It should be noted that when an element is referred to as being "connected to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined. In the description of this utility model, it should be noted that, unless otherwise specified or defined, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can mean fixed, removable, or integral; mechanical or electrical; direct or indirect through an intermediary; internal communication between two elements; or interaction between two elements. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0044] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment," "in some embodiments," or "in some embodiments" appear in various places throughout this specification, not all references are to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0045] Please also refer to Figures 1 to 7 The electrode frame with a foolproof structure provided by an embodiment of the present invention will now be described. The electrode frame with a foolproof structure provided by an embodiment of the present invention includes a frame body 1 and a foolproof structure 2 provided on the frame body 1. The frame body 1 is configured as a plate-like structure. An opening 11 for placing electrodes is provided in the center of the frame body 1. The foolproof structure 2 includes a plurality of foolproof protrusions 21 and a plurality of foolproof holes 22 for plugging and mating with the foolproof protrusions 21. The plurality of foolproof protrusions 21 are provided at intervals on the frame body 1, and the plurality of foolproof holes 22 are provided at intervals on the frame body 1. The foolproof protrusions 21 and the foolproof holes 22 are provided in a one-to-one correspondence. When multiple electrode frames are stacked and assembled, in adjacent electrode frames, each fool-proofing protrusion 21 on one electrode frame can be placed in the corresponding fool-proofing hole 22 on another electrode frame, so that the first side of one electrode frame can be tightly fitted with the second side of another electrode frame. On the one hand, it can play an anti-fool-proof role in the process of assembling two adjacent electrode frames, avoiding the incorrect assembly of two adjacent electrode frames when the assembly direction is incorrectly identified and judged. On the other hand, it can enable one electrode frame to be positioned on another electrode frame according to the correct assembly direction, realizing high-precision positioning and assembly of two adjacent electrode frames, and preventing the electrode frames from being misplaced and causing sealing leakage problems.

[0046] The electrode frame with a fool-proof structure provided by the embodiment of the utility model is compared with the prior art. By respectively arranging multiple fool-proof protrusions 21 and multiple fool-proof holes 22 on the frame body 1 of the electrode frame, since the multiple fool-proof protrusions 21 are arranged at intervals on the frame body 1, and the multiple fool-proof holes 22 are arranged at intervals on the frame body 1, and the fool-proof protrusions 21 and the fool-proof holes 22 are arranged in a one-to-one correspondence, when stacking and assembling multiple electrode frames, it is only necessary to align the fool-proof protrusions 21 on one electrode frame with the corresponding fool-proof holes 22 on the adjacent electrode frame so that the fool-proof protrusions 21 on one electrode frame can be placed in the corresponding fool-proof holes 22 on the other electrode frame, thereby fully ensuring that the two adjacent electrode frames can be positioned and assembled in the correct assembly direction, and effectively preventing the two adjacent electrode frames from being assembled incorrectly when the operator incorrectly identifies and judges the assembly direction, thereby playing a fool-proof role, ensuring the accuracy of the positioning and assembly of the electrode frames, avoiding the need for rework and reassembly due to assembly errors, and thus improving the efficiency of stacking and assembling the electrode frames. At the same time, after each anti-fool protrusion 21 on one electrode frame is completely placed in the corresponding anti-fool hole 22 on the other electrode frame, the first surface of one electrode frame can be tightly fitted with the second surface of the other electrode frame, and high-precision positioning and assembly of two adjacent electrode frames can be achieved, effectively preventing the electrode frames from being misaligned and causing sealing leakage problems.

[0047] Please refer to Figure 2 、 Figure 4 and Figure 7 In some embodiments, the fool-proofing protrusion 21 is a truncated cone-shaped protrusion, and the fool-proofing hole 22 is a truncated cone-shaped hole adapted to the truncated cone-shaped protrusion. By plugging and matching the multiple truncated cone-shaped protrusions on one electrode frame with the multiple truncated cone-shaped holes on another electrode frame, it can be fully guaranteed that the two adjacent electrode frames can be positioned and assembled in the correct assembly direction to play an anti-fool-proof role. At the same time, in the process of plugging the multiple truncated cone-shaped protrusions on one electrode frame into the corresponding truncated cone-shaped holes on another electrode frame, the cooperation between the truncated cone-shaped protrusions and the truncated cone-shaped holes can, on the one hand, reduce the difficulty of aligning the various fool-proofing protrusions 21 on one electrode frame with the corresponding fool-proofing holes 22 on the other electrode frame, which is conducive to improving assembly efficiency. On the other hand, it can play a role in guiding positioning installation, improving positioning accuracy, and helping to prevent the misalignment of the two adjacent electrode frames. In addition, as Figure 9 As shown, when the electrode frame is placed vertically, the interlocking fit of the truncated cone-shaped protrusions and the truncated cone-shaped holes can also be used to limit the vertical position of adjacent electrode frames, preventing the electrode frames from misaligning. It should be noted that in order to further reduce the difficulty of aligning and interlocking the fool-proofing protrusions 21 on one electrode frame with the corresponding fool-proofing holes 22 on another electrode frame, flares 19 are provided on the frame body 1 of each electrode frame at positions corresponding to the fool-proofing holes 22. Under the guiding effect of the flares 19, the fool-proofing protrusions 21 on one electrode frame can be quickly inserted into the corresponding fool-proofing holes 22 on the other electrode frame.

[0048] It is understandable that in some other embodiments, the fool-proofing protrusion 21 may also be a conical protrusion, and correspondingly, the fool-proofing hole 22 is a conical hole adapted to the conical protrusion. In some other embodiments, the fool-proofing protrusion 21 may also be a prism-shaped protrusion, and correspondingly, the fool-proofing hole 22 is a prism-shaped hole adapted to the prism-shaped protrusion. In some other embodiments, the fool-proofing protrusion 21 may also be a pyramid-shaped protrusion, and correspondingly, the fool-proofing hole 22 is a pyramid-shaped hole adapted to the pyramid-shaped protrusion. It should be noted that when the fool-proofing protrusion 21 is a pyramid-shaped protrusion, the pyramid-shaped protrusion may be, but is not limited to, a protrusion with a conical structure such as a triangular pyramid, a quadrangular pyramid or a pentagonal pyramid.

[0049] Please refer to Figure 5 、 Figure 6 and Figure 7 In some embodiments, the fool-proof protrusion 21 is a truncated cone-shaped protrusion, and the fool-proof hole 22 is a truncated cone-shaped hole adapted to the truncated cone-shaped protrusion. The truncated cone-shaped hole includes a through hole portion 221 located on the frame body 1 and a blind hole portion 222 located in the truncated cone-shaped protrusion. The depth of the fool-proof hole 22 is greater than the axial length of the truncated cone-shaped protrusion. Through the above-mentioned structural setting, when multiple truncated cone-shaped protrusions on one electrode frame are inserted into corresponding truncated cone-shaped holes on another electrode frame, the truncated cone-shaped holes are prevented from interfering with the truncated cone-shaped protrusions, thereby ensuring that the first surface of one electrode frame and the second surface of another electrode frame are tightly fitted together, which is beneficial to improving the accuracy and stability of the positioning and assembly of the two adjacent electrode frames. In addition, as Figure 9 As shown, when the electrode frame is placed vertically, since the depth of the anti-fouling hole 22 is greater than the axial length of the truncated cone-shaped protrusion, the plug-in fit between the truncated cone-shaped protrusion and the truncated cone-shaped hole can also be used to limit the vertical direction of adjacent electrode frames to prevent the electrode frames from being misplaced.

[0050] Please refer to Figure 7 In some embodiments, the fool-proof protrusion 21 is a truncated cone-shaped protrusion, and the ratio of the axial length of the truncated cone-shaped protrusion to the thickness of the frame 1 is (4 to 6): 1. On the one hand, it can be used to limit the vertical direction of adjacent electrode frames to prevent the electrode frames from being misplaced; on the other hand, it is also convenient for guiding, so that the fool-proof protrusion 21 can be smoothly inserted into the fool-proof hole 22.

[0051] Please refer to Figure 7 In some embodiments, the fool-proof protrusion 21 is a frustum-shaped protrusion, and the cone angle α of the frustum-shaped protrusion is 30° to 90°, which can reduce the guide angle to facilitate guiding and positioning.

[0052] Please refer to Figure 1 、 Figure 3 and Figure 5In some embodiments, the lines connecting multiple fool-proofing protrusions 21 in sequence can form a polygon, which is a non-regular polygon, a convex polygon, or a concave polygon. In this way, when the assembly direction of two adjacent electrode frames is incorrectly identified, the fool-proofing protrusions 21 on one electrode frame cannot be completely aligned with the corresponding fool-proofing holes 22 on the other electrode frame, so that one electrode frame cannot be assembled on the other electrode frame, fully ensuring that the two adjacent electrode frames can be positioned and assembled according to the correct assembly direction, effectively preventing the two adjacent electrode frames from being incorrectly assembled when the operator incorrectly identifies the assembly direction, thereby playing a fool-proof role and ensuring the accuracy of the electrode frame positioning and assembly. For example, in one specific embodiment, the frame body 1 of each electrode frame is provided with four fool-proofing protrusions 21 and four fool-proofing holes 22, but the four fool-proofing protrusions 21 and the four fool-proofing holes 22 on the frame body 1 of each electrode frame are arranged at the same position, and the fool-proofing protrusions 21 and the fool-proofing holes 22 are arranged one-to-one. The positions of two of the foolproof protrusions 21 are asymmetrical with respect to the positions of the other two foolproof protrusions 21, and a line connecting the four foolproof protrusions 21 in sequence can form an irregular polygon, a convex polygon, or a concave polygon. Similarly, the positions of two of the foolproof holes 22 are asymmetrical with respect to the positions of the other two foolproof holes 22, and a line connecting the four foolproof protrusions 21 in sequence can form an irregular polygon, a convex polygon, or a concave polygon.

[0053] Please refer to Figure 1 、 Figure 3 and Figure 5 In some embodiments, the fool-proof protrusions 21 on all electrode frames are oriented in the same direction, which facilitates the injection molding preparation and assembly of the electrode frames.

[0054] Please refer to Figure 8 In some embodiments, a side of the frame body 1 of the electrode frame where no flow channel is provided is provided with an assembly groove 12 for assembling the bipolar plate 9 , and the bipolar plate 9 is installed in the assembly groove 12 .

[0055] Please refer to Figure 1 In some embodiments, the frame body 1 of the electrode frame is provided with an electrolyte inlet 13, an electrolyte inlet 14, an electrolyte outlet 15, and an electrolyte outlet 16. The electrolyte inlet 13, the electrolyte outlet 15, the electrolyte inlet 14, and the electrolyte outlet 16 serve as the electrolyte inlets and outlets of the two electrodes, respectively. Only the electrolyte inlet and outlet of one electrode on a single frame body 1 is connected to the opening 11. For example, the frame body 1 of the electrode frame is provided with a main inlet channel 17 connecting the opening 11 and the electrolyte inlet 13, and a main outlet channel 18 connecting the opening 11 and the electrolyte outlet 15.

[0056] Please refer to Figure 8 and Figure 9The present invention also provides a flow battery stack, comprising an electrode frame with a foolproof structure as provided in any of the above embodiments. Since the flow battery stack has all the technical features of the electrode frame with a foolproof structure as provided in any of the above embodiments, it has the same technical effects as the electrode frame with a foolproof structure as provided in the above embodiments.

[0057] Please refer to Figure 8 and Figure 9 In some embodiments, the liquid flow battery stack includes a first end plate 3, a first insulating plate 4, a first current collecting plate 5, a second end plate 6, a second insulating plate 7, a second current collecting plate 8, a plurality of bipolar plates 9 and a plurality of electrode frames with an anti-foolproof structure, the plurality of electrode frames are stacked and assembled between the first current collecting plate 5 and the second current collecting plate 8, the first end plate 3 is stacked on the side of the first current collecting plate 5 facing away from the electrode frame, the first insulating plate 4 is interposed between the first end plate 3 and the first current collecting plate 5, the second end plate 6 is stacked on the side of the second current collecting plate 8 facing away from the electrode frame, the second insulating plate 7 is interposed between the second end plate 6 and the second current collecting plate 8, and each bipolar plate 9 is arranged in an assembly groove 12 on the corresponding electrode frame.

[0058] Please refer to Figure 8 and Figure 9 In some embodiments, a plurality of first positioning protrusions 31 are provided on the first end plate 3, a plurality of first positioning holes 61 are provided on the second end plate 6, a plurality of second positioning holes 42 are provided on the first surface of the first insulating plate 4, a plurality of second positioning protrusions 41 are provided on the second surface of the first insulating plate 4, a plurality of first conical holes 51 are provided on the first current collecting plate 5, a plurality of second conical holes 81 are provided on the second current collecting plate 8, and a plurality of third conical holes 71 are provided on the second insulating plate 7; the first positioning protrusion 31 has the same shape as the anti-fool protrusion 21, the second positioning protrusion 41 has the same structure as the anti-fool protrusion 21 on the electrode frame, the first positioning holes 61 and the second positioning holes 42 are provided on the first surface of the first insulating plate 4, the first current collecting plate 5 has a plurality of first conical holes 51, the second current collecting plate 8 has a plurality of second conical holes 81, and the second insulating plate 7 has a plurality of third conical holes 71; the first positioning protrusion 31 has the same shape as the anti-fool protrusion 21, the second positioning protrusion 41 has the same structure as the anti-fool protrusion 21 on the electrode frame, the first positioning holes 61 and the second positioning holes 42 are provided on the second surface of the first insulating plate 4 The structure is the same as the foolproof hole 22 on the electrode frame; each first positioning protrusion 31 is inserted into the corresponding second positioning hole 42, and each second positioning protrusion 41 passes through the first tapered hole 51 and is inserted into the corresponding foolproof hole 22 on the adjacent electrode frame. Each foolproof protrusion 21 on the electrode frame adjacent to the second current collecting plate 8 passes through the corresponding second tapered hole 81 and the corresponding third tapered hole 71 and is inserted into the corresponding first positioning hole 61. On the one hand, it can improve positioning accuracy and avoid local displacement of the electrode frame. On the other hand, it can play a foolproof role and avoid assembly errors of the electrode frame. In addition, it can also increase the assembly speed of various components of the liquid flow battery stack, which is conducive to improving assembly efficiency. The foolproof structure does not involve the bipolar plates, membranes, electrodes, seals and other structures on the stack. The membranes, electrodes and seals are not shown in the figure.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electrode frame with a fool-proof structure, characterized in that: include: a frame having an opening; and A fool-proof structure provided on the frame, the fool-proof structure comprising a plurality of fool-proof protrusions and a plurality of fool-proof holes for the fool-proof protrusions to be plugged into and matched with, the plurality of fool-proof protrusions being arranged at intervals, the plurality of fool-proof holes being arranged at intervals, and the fool-proof protrusions being arranged in one-to-one correspondence with the fool-proof holes; Each fool-proofing protrusion on one electrode frame can be placed in the corresponding fool-proofing hole on the adjacent electrode frame, so that the side of one electrode frame fits with the side of the adjacent electrode frame, and one electrode frame can be positioned on the adjacent electrode frame in the correct assembly direction.

2. The electrode frame with foolproof structure according to claim 1, characterized in that: The anti-fool-proof protrusion is a truncated cone-shaped protrusion, and the anti-fool-proof hole is a truncated cone-shaped hole adapted to the truncated cone-shaped protrusion; or, the anti-fool-proof protrusion is a conical protrusion, and the anti-fool-proof hole is a conical hole adapted to the conical protrusion; or, the anti-fool-proof protrusion is a prism-shaped protrusion, and the anti-fool-proof hole is a prism-shaped hole adapted to the prism-shaped protrusion; or, the anti-fool-proof protrusion is a pyramid-shaped protrusion, and the anti-fool-proof hole is a pyramid-shaped hole adapted to the pyramid-shaped protrusion.

3. The electrode frame with foolproof structure according to claim 1, characterized in that: The fool-proof hole includes a through hole portion located on the frame body and a blind hole portion located in the fool-proof protrusion. The depth of the fool-proof hole is greater than the axial length of the fool-proof protrusion.

4. The electrode frame with foolproof structure according to claim 1, characterized in that: The ratio of the axial length of the fool-proof protrusion to the thickness of the frame is (4-6):

1.

5. The electrode frame with foolproof structure according to claim 1, characterized in that: The fool-proof protrusion is a truncated cone-shaped protrusion, and the cone angle α of the truncated cone-shaped protrusion is 30° to 90°.

6. The electrode frame with foolproof structure according to claim 1, characterized in that: Lines connecting a plurality of the fool-proofing protrusions in sequence can form a polygon, which is an irregular polygon, a convex polygon, or a concave polygon; the fool-proofing protrusions on adjacent electrode frames have the same orientation.

7. The electrode frame with fool-proof structure according to any one of claims 1 to 6, characterized in that: An assembly groove for assembling bipolar plates is provided on one side of the frame where no flow channel is provided.

8. A flow battery stack comprising a first end plate, a first insulating plate, a first current collecting plate, a second end plate, a second insulating plate, a second current collecting plate and a bipolar plate, characterized in that: It also includes an electrode frame with a fool-proof structure as described in any one of claims 1 to 7.

9. The flow battery stack according to claim 8, wherein: The first end plate is provided with a plurality of first positioning protrusions, the second end plate is provided with a plurality of first positioning holes, the first surface of the first insulating plate is provided with a plurality of second positioning protrusions, the second surface of the first insulating plate is provided with a plurality of first conical holes, the first current collecting plate is provided with a plurality of second conical holes, and the second insulating plate is provided with a plurality of third conical holes; the second positioning protrusions have the same structure as the anti-fool protrusions on the electrode frame, and the first positioning holes and the second positioning holes have the same structure as the anti-fool holes on the electrode frame; each first positioning protrusion is inserted into the corresponding second positioning hole, and each second positioning protrusion is inserted into the corresponding anti-fool hole on the adjacent electrode frame after passing through the corresponding first conical hole, and each anti-fool protrusion on the electrode frame adjacent to the second current collecting plate passes through the corresponding second conical hole and the corresponding third conical hole in sequence and is inserted into the corresponding first positioning hole.

10. The flow battery stack according to claim 8, wherein: The bipolar plate is arranged in the assembly groove on the electrode frame.

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