Electrode frame of a flow battery and flow battery

Abstract

The application provides an electrode frame of a flow battery and the flow battery. The electrode frame adjusts the flow rate of electrolyte by arranging a first flow disturbing structure and a second flow disturbing structure with multi-stage flow disturbing functions, so as to effectively enhance the distribution uniformity of the electrolyte when the electrolyte enters the porous electrode, and effectively reduce the flow dead zone of the electrolyte when the electrolyte leaves the porous electrode, reduce the concentration polarization of the flow battery, and finally improve the capacity utilization rate and energy efficiency of the flow battery.

Description

Technical Field

[0001] This invention relates to the field of flow battery technology, and more specifically, to an electrode frame and a flow battery. Background Technology

[0002] Increasing the utilization rate of renewable energy sources such as wind and solar power to support the huge growth in energy consumption is the main strategy for future energy development. However, the inherent intermittency and volatility of renewable energy will pose a huge challenge to the stable operation of the power system.

[0003] When the grid connection rate of renewable energy exceeds 20%, the stability of the power supply system will be threatened. Configuring energy storage power stations is a key step in addressing renewable energy consumption and ensuring stable grid operation. Flow batteries possess the advantage of decoupling capacity and power. Capacity mainly depends on electrolyte solubility and tank size, while power mainly depends on electrode reaction kinetics and stack size, making them the most promising large-scale, long-term energy storage technology. Based on the electrolyte, flow batteries can be classified into vanadium redox flow batteries, zinc-bromine flow batteries, iron-chromium flow batteries, and organic flow batteries, among others. Regardless of the specific technology, effective measures to improve the capacity utilization and energy efficiency of flow batteries need to be explored. Summary of the Invention

[0004] In view of this, to solve the above problems, the present invention provides an electrode frame for a flow battery and a flow battery, the technical solution of which is as follows:

[0005] An electrode frame for a flow battery, the electrode frame comprising:

[0006] An electrode frame body, the electrode frame body including a first surface, the first surface being parallel to the plane where the electrode frame body is located;

[0007] The inlet main channel groove and the outlet main channel groove are located on the first surface, and the central groove is located between the inlet main channel groove and the outlet main channel groove. The central groove penetrates the electrode frame body and is used to place the porous electrode of the flow battery.

[0008] A first turbulence structure is provided in the area adjacent to the middle groove of the main inlet channel groove;

[0009] A second turbulence structure is provided in the area adjacent to the middle groove of the main outlet channel;

[0010] The first and second turbulence structures have the same structure, including:

[0011] Porous media layer;

[0012] A plurality of first turbulence protrusions are arranged sequentially at intervals in a first direction on one side of the porous dielectric layer adjacent to the central groove;

[0013] A plurality of second turbulence protrusions are arranged at intervals in the first direction on the side of the porous medium layer away from the central groove;

[0014] The first direction is the length extension direction of the porous dielectric layer.

[0015] Preferably, in the electrode frame described above, the spacing between two adjacent first turbulence protrusions is equal in the first direction.

[0016] Preferably, in the electrode frame described above, the spacing between two adjacent second turbulence protrusions is equal in the first direction.

[0017] Preferably, in the electrode frame described above, the first turbulence protrusion is tangent to the porous electrode.

[0018] Preferably, in the electrode frame described above, the porous dielectric layer is made of any one of polyethylene, polypropylene, polytetrafluoroethylene, polyvinyl chloride, and polyvinylidene fluoride.

[0019] Preferably, in the electrode frame described above, the orthographic projection of the first turbulence protrusion onto the first surface is a semicircle, a triangle, or a pentagon.

[0020] Preferably, in the electrode frame described above, the orthographic projection of the second turbulence protrusion onto the first surface is a square or a rectangle.

[0021] Preferably, in the electrode frame described above, the pore size of the porous dielectric layer is larger than the pore size of the porous electrode;

[0022] The porosity of the porous dielectric layer is greater than that of the porous electrode.

[0023] Preferably, in the electrode frame described above, in the direction perpendicular to the first surface, the depth of the inlet main channel groove and the depth of the outlet main channel groove are respectively less than the thickness of the electrode frame body.

[0024] A flow battery comprising the electrode frame described in any of the preceding claims.

[0025] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0026] The present invention provides an electrode frame for a flow battery, comprising: an electrode frame body, the electrode frame body including a first surface, the first surface being parallel to the plane of the electrode frame body; an inlet main channel groove and an outlet main channel groove located on the first surface, and a central groove located between the inlet main channel groove and the outlet main channel groove, the central groove penetrating the electrode frame body, the central groove being used to place a porous electrode of the flow battery; a first turbulence structure is provided in the region of the inlet main channel groove adjacent to the central groove; a second turbulence structure is provided in the region of the outlet main channel groove adjacent to the central groove; the first turbulence structure and the second turbulence structure have the same structure, including: a porous dielectric layer; a plurality of first turbulence protrusions arranged sequentially at intervals in a first direction on the side of the porous dielectric layer adjacent to the central groove; a plurality of second turbulence protrusions arranged sequentially at intervals in the first direction on the side of the porous dielectric layer away from the central groove; the first direction being the length extension direction of the porous dielectric layer. The electrode frame adjusts the flow rate of the electrolyte by setting a first turbulence structure and a second turbulence structure with multi-stage turbulence function. This effectively enhances the uniformity of electrolyte distribution when entering the porous electrode and reduces the flow dead zone when the electrolyte leaves the porous electrode, thereby reducing the concentration polarization of the flow battery and ultimately improving the capacity utilization and energy efficiency of the flow battery. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, 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 embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the electrode frame of a flow battery provided in an embodiment of the present invention;

[0029] Figure 2 This is a flow rate distribution diagram of the electrolyte in Example 1;

[0030] Figure 3 This is a schematic diagram of the charge-discharge curves of an aqueous organic flow battery assembled with the electrode frame defined by the above parameters in Example 1.

[0031] Figure 4 This is a schematic diagram of the discharge power curve of an aqueous organic flow battery assembled with the electrode frame defined by the above parameters in Example 1.

[0032] Figure 5 This is a schematic diagram of the rate performance of an aqueous organic flow battery assembled with the electrode frame defined by the above parameters in Example 1.

[0033] Figure 6 This is a schematic diagram illustrating the capacity utilization of an aqueous organic flow battery assembled with the electrode frame defined above in Example 1 under different electrolyte inflow rates and different current densities.

[0034] Figure 7 This is a schematic diagram illustrating the energy efficiency of an aqueous organic flow battery assembled with the electrode frame defined above in Example 1 under different electrolyte inflow rates and different current densities.

[0035] Figure 8 A schematic diagram of the capacity utilization of a conventional aqueous organic flow battery with a single electrode frame under different electrolyte inflow rates and different current densities.

[0036] Figure 9 A schematic diagram showing the energy efficiency of a conventional aqueous organic flow battery assembled with a single electrode frame under different electrolyte inflow rates and different current densities.

[0037] Figure 10 This is a schematic diagram comparing the capacity utilization and energy efficiency of an aqueous organic flow battery assembled with the electrode frame defined by the above parameters in Embodiment 1 and a conventional aqueous organic flow battery assembled with a certain electrode frame, provided as an embodiment of the present invention, under the same flow battery operating conditions. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] refer to Figure 1 , Figure 1 This is a schematic diagram of the electrode frame of a flow battery according to an embodiment of the present invention. The electrode frame of the flow battery includes:

[0041] Electrode frame body A, the electrode frame body A includes a first surface, the first surface being parallel to the plane on which the electrode frame body A is located.

[0042] The inlet main channel groove 2 and the outlet main channel groove 10 are located on the first surface, and the central groove 6 is located between the inlet main channel groove 2 and the outlet main channel groove 10. The central groove 6 penetrates the electrode frame body A and is used to place the porous electrode of the flow battery.

[0043] A first turbulence structure 15 is provided in the area of ​​the inlet main channel groove 2 adjacent to the middle groove 6.

[0044] A second turbulence structure 16 is provided in the area of ​​the main outlet channel groove 10 adjacent to the central groove 6, wherein the first turbulence structure 15 and the second turbulence structure 16 are connected through the central groove 6.

[0045] The first turbulence structure 15 and the second turbulence structure 16 have the same structure, including:

[0046] A porous dielectric layer; a plurality of first turbulence protrusions arranged sequentially at intervals in the first direction X on one side of the porous dielectric layer adjacent to the central groove 6; it should be noted that the porous dielectric layer is numbered 4 in the first turbulence structure 15 and 8 in the second turbulence structure 16; the first turbulence protrusion is numbered 5 in the first turbulence structure 15 and 7 in the second turbulence structure 16.

[0047] A plurality of second turbulence protrusions are arranged sequentially at intervals in the first direction X on the side of the porous medium layer away from the central groove 6. It should be noted that the second turbulence protrusion is numbered 3 in the first turbulence structure 15 and 9 in the second turbulence structure 16.

[0048] The first direction X is the length extension direction of the porous dielectric layer.

[0049] It should be noted that the porous electrode is made of carbon felt or carbon paper, and can be used in single or multiple layers. The thickness of the porous electrode is the same as the depth of the central groove 6.

[0050] Specifically, in this embodiment of the invention, the electrode frame further includes an electrolyte inlet through-hole 1 located on the side of the inlet main channel groove 2 away from the central groove 6, and an electrolyte outlet through-hole 11 located on the side of the outlet main channel groove 10 away from the central groove 6, such as... Figure 1The electrode frame shown also includes an electrolyte inlet through-hole 12 and an electrolyte outlet through-hole 13. It should be noted that when the electrolyte inlet through-hole 1 is the positive electrode electrolyte inlet through-hole, the electrolyte inlet through-hole 12 is the negative electrode electrolyte inlet through-hole; when the electrolyte outlet through-hole 11 is the positive electrode electrolyte outlet through-hole, the electrolyte outlet through-hole 13 is the negative electrode electrolyte outlet through-hole; similarly, when the electrolyte inlet through-hole 1 is the negative electrode electrolyte inlet through-hole, the electrolyte inlet through-hole 12 is the positive electrode electrolyte inlet through-hole; when the electrolyte outlet through-hole 11 is the negative electrode electrolyte outlet through-hole, the electrolyte outlet through-hole 13 is the positive electrode electrolyte outlet through-hole.

[0051] In this embodiment of the invention, the electrolyte inlet hole 1 and the electrolyte outlet hole 11 are centrally symmetrically distributed.

[0052] like Figure 1 As shown, the electrode frame of the flow battery also includes multiple positioning through holes 14. In this embodiment of the invention, the electrode frame includes four positioning through holes 14 in the top, bottom, left, and right directions as an example. In some other embodiments, the positioning through holes may be designed in other numbers and / or other arrangements to increase the ease of assembly of the flow battery.

[0053] As described above, the first turbulence structure 15 and the second turbulence structure 16 have the same structure. Both are provided with a three-stage turbulence structure consisting of a second turbulence protrusion, a porous dielectric layer, and a first turbulence protrusion. This allows for adjustment of the electrolyte flow rate, effectively enhancing the uniformity of electrolyte distribution when entering the porous electrode. It also effectively reduces the flow dead zone when the electrolyte leaves the porous electrode, thereby reducing concentration polarization in the flow battery and ultimately improving the capacity utilization and energy efficiency of the flow battery.

[0054] Optionally, in another embodiment of the present invention, the spacing between two adjacent second turbulence protrusions is equal in the first direction X.

[0055] Specifically, in this embodiment of the invention, among a plurality of second turbulence protrusions arranged sequentially at intervals in the first direction X, the spacing between two adjacent second turbulence protrusions is made equal, serving as a first-stage turbulence structure to achieve initial uniform distribution of the inflowing electrolyte.

[0056] Optionally, the orthographic projection of the second spoiler protrusion onto the first surface is a square, rectangle, or other shape. Figure 1 The example below uses a square as an illustration.

[0057] The width of the second turbulence protrusion is no greater than the width of the flow channel between the two second turbulence protrusions.

[0058] Optionally, in another embodiment of the present invention, the material of the porous media layer includes, but is not limited to, any one of polyethylene, polypropylene, polytetrafluoroethylene, polyvinyl chloride, and polyvinylidene fluoride, that is, the porous media layer is a filled porous media layer.

[0059] The pore size of the porous dielectric layer is larger than the pore size of the porous electrode.

[0060] The porosity of the porous dielectric layer is greater than that of the porous electrode.

[0061] Specifically, in this embodiment of the invention, since the flow velocity distribution of the inflowing electrolyte in the inlet mainstream channel groove 2 is uneven, the electrolyte flow velocity is greater when it enters the first-stage turbulence structure near the inlet side. Therefore, in this embodiment of the invention, a porous dielectric layer is used as the second-stage turbulence structure to fully turbulently agitate the electrolyte initially distributed by the first-stage turbulence structure, so that the electrolyte flow velocity is evenly distributed and enters the subsequent third-stage turbulence structure.

[0062] Optionally, in another embodiment of the present invention, the spacing between two adjacent first turbulence protrusions is equal in the first direction X.

[0063] Specifically, in this embodiment of the invention, among a plurality of first turbulence protrusions arranged sequentially at intervals in the first direction X, the spacing between two adjacent first turbulence protrusions is made equal, serving as a third-level turbulence structure to achieve the final uniform distribution of the inflowing electrolyte.

[0064] Optionally, the orthographic projection of the first spoiler protrusion onto the first surface is a semicircle, triangle, pentagon, or other shape. Figure 1 The example below is a semi-circle.

[0065] Optionally, in another embodiment of the present invention, the first turbulence protrusion is tangent to the porous electrode, and the first turbulence structure 15 and the second turbulence structure 16 are symmetrically designed.

[0066] Specifically, in this embodiment of the invention, the apex of the first turbulence protrusion is tangent to the porous electrode, which helps to reduce the flow dead zone caused by the electrolyte contacting the first turbulence protrusion when it flows out of the porous electrode; and the first turbulence structure 15 and the second turbulence structure 16 are designed symmetrically, so that the electrolyte has the same fluid distribution characteristics when it flows from bottom to top or from top to bottom in each chamber of the flow battery, thereby improving the consistency of the chambers.

[0067] In summary, this electrode frame adjusts the flow rate of the electrolyte by setting a first turbulence structure and a second turbulence structure with multi-stage turbulence function. This effectively enhances the uniformity of electrolyte distribution when entering the porous electrode and reduces the flow dead zone when the electrolyte leaves the porous electrode, thereby reducing the concentration polarization of the flow battery and ultimately improving the capacity utilization and energy efficiency of the flow battery.

[0068] Optionally, in another embodiment of the present invention, in a direction perpendicular to the first surface, the depth of the inlet main channel groove 2 and the depth of the outlet main channel groove 10 are respectively less than the thickness of the electrode frame body A.

[0069] Specifically, in this embodiment of the invention, the depth of the inlet main channel groove 2 and the depth of the outlet main channel groove 10 are the same, both less than the depth of the middle groove 6; wherein the depth of the inlet main channel groove 2 and the depth of the outlet main channel groove 10 can be 0.5mm-4.5mm; the depth of the middle groove 6 is the same as that of the electrode frame body A, and can be 1.0mm-5.0mm.

[0070] The height of the first turbulence protrusion is the same as the height of the second turbulence protrusion, and the depth of the inlet main channel groove 2 and the outlet main channel groove 10 are the same.

[0071] The four edges of the porous dielectric layer are respectively attached to the first turbulence protrusion, the second turbulence protrusion and the inner wall of the electrode frame. The filling height of the porous dielectric layer is also the same as the depth of the inlet mainstream channel groove 2 and the depth of the outlet mainstream channel groove 10.

[0072] Based on the above embodiments of the present invention, the following describes the solution further with reference to several specific embodiments:

[0073] Example 1

[0074] In Embodiment 1, the electrode frame body A has a thickness of 3.0 mm; the inlet and outlet through holes of the electrolyte are both 2.5 mm in radius and 3.0 mm in depth; the inlet main channel groove 2 and the outlet main channel groove 10 have depths of 2.5 mm; the central groove 6 has a length of 92.5 mm, a width of 60.0 mm, and a depth of 3.0 mm; the first turbulence boss is a semi-circular boss with a radius of 1.25 mm; the porous dielectric layer is a porous dielectric layer filled with polyethylene mesh, the filling area has a length of 92.5 mm, a width of 3.75 mm, and a filling height of 2.5 mm; the second turbulence boss is a rectangular boss with a length of 2.5 mm, a width of 1.25 mm, and a height of 2.5 mm; the porous electrode is made of carbon felt material with a thickness of 3.0 mm.

[0075] An aqueous organic flow battery was assembled using an electrode frame defined by the above parameters. The positive electrode electrolyte consisted of the active material N,N,N-2,2,6,6-heptamethylpiperidinoxy-4-ammonium chloride and the supporting electrolyte sodium chloride, with N,N,N-2,2,6,6-heptamethylpiperidinoxy-4-ammonium chloride having a concentration of 0.5 mol / L and sodium chloride having a concentration of 1.0 mol / L. The negative electrode electrolyte consisted of the active material methyl viologen and the supporting electrolyte sodium chloride, with methyl viologen having a concentration of 0.5 mol / L and sodium chloride having a concentration of 1.0 mol / L. The electrolyte flowed in through the lower inlet and out through the diagonally above outlet. The electrolyte flow rate distribution was simulated using the commercial software package COMSOL Multiphysics@. Figure 2 As shown, Figure 2 The diagram shows the electrolyte flow rate distribution in Example 1. The mathematical model used in the simulation mainly includes the momentum conservation and continuity equations, where the permeability of the porous medium is obtained by the Carman-Kozeny equation.

[0076] An aqueous organic flow battery was assembled using the electrode frame defined by the above parameters, and battery performance was tested. Figure 3 This is a schematic diagram of the charge-discharge curves of an aqueous organic flow battery assembled with the electrode frame defined by the above parameters in Example 1, specifically at 20 mA·cm⁻¹ under different electrolyte inflow rates. -2 The curve showing the change of battery voltage with battery capacity during constant current charging and discharging; Figure 4 This is a schematic diagram of the discharge power curve of an aqueous organic flow battery assembled with the electrode frame defined above in Example 1, specifically with an electrolyte inflow rate of 140 mL / min. -1 At that time, the maximum discharge power density of the battery at different charge levels; Figure 5 This is a schematic diagram illustrating the rate performance of an aqueous organic flow battery assembled with the electrode frame defined above in Example 1, specifically with an electrolyte inflow rate of 140 mL / min. -1 At that time, the battery was subjected to different current densities (100 mA·cm). -2 ~20mA·cm -2 The constant current charge-discharge cycle was performed, with 6 cycles per current density, and the resulting capacitance utilization, coulombic efficiency, and energy efficiency were calculated. Figure 6 This is a schematic diagram illustrating the capacity utilization of an aqueous organic flow battery assembled with the electrode frame defined above in Example 1 under different electrolyte inflow rates and different current densities. Figure 7 This is a schematic diagram illustrating the energy efficiency of an aqueous organic flow battery assembled with the electrode frame defined above in Example 1 under different electrolyte inflow rates and different current densities.

[0077] Example 2

[0078] In Example 2, the electrode frame body A has a thickness of 3.0 mm; the radius of the electrolyte inlet and outlet through-holes is 2.5 mm and the depth is 3.0 mm; the depth of the inlet main channel groove 2 and the outlet main channel groove 10 is 2.5 mm; the length of the central groove 6 is 92.5 mm and the width is 60.0 mm, and the depth is 3.0 mm; the first turbulence protrusion is a regular pentagonal protrusion with a distance of 2.5 mm between the two vertices of the regular pentagonal protrusion, and one of its edges is in contact with the edge of the porous dielectric layer; the porous dielectric layer is a porous dielectric layer filled with polyethylene mesh, with a length of 92.5 mm, a width of 3.75 mm, and a filling height of 2.5 mm; the second turbulence protrusion is a rectangular protrusion with a length of 2.5 mm, a width of 1.25 mm, and a height of 2.5 mm; the porous electrode is made of carbon felt material with a thickness of 3.0 mm.

[0079] Example 3

[0080] In Example 3, the electrode frame body A has a thickness of 3.0 mm; the inlet and outlet through holes of the electrolyte are both 2.5 mm in radius and 3.0 mm in depth; the inlet main channel groove 2 and the outlet main channel groove 10 have depths of 2.5 mm; the central groove 6 has a length of 92.5 mm, a width of 60.0 mm, and a depth of 3.0 mm; the first turbulence boss is a semi-circular boss with a radius of 1.25 mm; the porous dielectric layer is a porous dielectric layer filled with polyvinyl chloride mesh, with a filling area of ​​92.5 mm in length, 3.75 mm in width, and a filling height of 2.5 mm; the second turbulence boss is a rectangular boss with a length of 2.5 mm, a width of 1.25 mm, and a height of 2.5 mm; the porous electrode is made of carbon felt material with a thickness of 3.0 mm.

[0081] Regarding the electrode frame of a traditional flow battery, refer to Figure 8 , Figure 8 A schematic diagram illustrating the capacity utilization of a conventional aqueous organic flow battery with a single electrode frame under different electrolyte inflow rates and current densities; (Reference) Figure 9 , Figure 9 A schematic diagram showing the energy efficiency of a conventional aqueous organic flow battery with a specific electrode frame under different electrolyte inflow rates and current densities.

[0082] refer to Figure 10 , Figure 10 This invention provides a schematic diagram comparing the capacity utilization and energy efficiency of an aqueous organic flow battery assembled with electrode frames defined in Embodiment 1 and a conventional aqueous organic flow battery assembled with a certain electrode frame, under the same flow battery operating conditions. Figure 10The characterization information shows that the aqueous organic flow battery assembled using the electrode frame of the flow battery provided in this embodiment of the invention exhibits improved capacity utilization and energy efficiency at different current densities; specifically, at 20 mA·cm -2 Constant current charge-discharge: Based on Example 1, the capacity utilization rate of the aqueous organic flow battery assembled with the electrode frame defined above is 0.79% higher than that of a conventional aqueous organic flow battery assembled with a certain electrode frame, and the energy efficiency is 1.35% higher; 40mA·cm⁻¹ 2 The constant current charge-discharge method shows that the capacity utilization rate of the aqueous organic flow battery assembled with the electrode frame defined by the above parameters in Example 1 is 2.74% higher and the energy efficiency is 3.08% higher than that of a conventional aqueous organic flow battery assembled with a certain electrode frame.

[0083] Optionally, based on all the above embodiments of the present invention, another embodiment of the present invention also provides a flow battery, which includes the electrode frame described in any of the above embodiments.

[0084] The electrode frame and flow battery of the present invention have been described in detail above. Specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

[0085] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0086] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that elements inherent to a process, method, article, or apparatus that comprises a list of elements, or elements inherent to such processes, methods, articles, or apparatus, are also included. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0087] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electrode frame for a flow battery, characterized in that, The electrode frame includes: An electrode frame body, the electrode frame body including a first surface, the first surface being parallel to the plane where the electrode frame body is located; The inlet main channel groove and the outlet main channel groove are located on the first surface, and the central groove is located between the inlet main channel groove and the outlet main channel groove. The central groove penetrates the electrode frame body and is used to place the porous electrode of the flow battery. A first turbulence structure is provided in the area adjacent to the middle groove of the main inlet channel groove; A second turbulence structure is provided in the area adjacent to the middle groove of the main outlet channel; The first and second turbulence structures have the same structure, including: Porous media layer; A plurality of first turbulence protrusions are arranged sequentially at intervals in a first direction on one side of the porous dielectric layer adjacent to the central groove; the orthographic projection of the first turbulence protrusion on the first surface is a semi-circle, and the first turbulence protrusion is tangent to the porous electrode. A plurality of second turbulence protrusions are arranged at intervals in the first direction on the side of the porous medium layer away from the central groove; The first direction is the length extension direction of the porous dielectric layer; In the first direction, the spacing between two adjacent first turbulence protrusions is equal; In the first direction, the spacing between two adjacent second turbulence protrusions is equal; The porous media layer is made of any one of polyethylene, polypropylene, polytetrafluoroethylene, polyvinyl chloride, and polyvinylidene fluoride. The orthographic projection of the second turbulence protrusion onto the first surface is a square or a rectangle; The pore size of the porous dielectric layer is larger than the pore size of the porous electrode; The porosity of the porous dielectric layer is greater than that of the porous electrode; In the direction perpendicular to the first surface, the depth of the inlet main channel groove and the depth of the outlet main channel groove are respectively less than the thickness of the electrode frame body.

2. A flow battery, characterized in that, The flow battery includes the electrode frame as described in claim 1.

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