A flow channel structure of an electrode plate frame of a flow battery capable of reducing flow resistance

Abstract

The utility model discloses a kind of liquid flow battery electrode plate frame runner structures of reducing flow resistance, including frame plate, the inner wall of the frame plate is equipped with inflow channel, the inner wall of the frame plate is equipped with outflow channel, the inner wall of the frame plate is fixedly connected with multiple resistance triangles, the inner wall of the frame plate is equipped with public flow channel.When electrolyte is pumped into from the inflow channel of electric pile by magnetic pump, outflow channel is pumped out to liquid storage tank, and a circulating operation of electric pile is formed, when electrolyte passes through resistance triangle structure in electrode plate frame plate, the flow resistance of entire electrolyte will be reduced, improve the efficiency performance of electric pile and reduce pump consumption, multiple resistance triangles form a specific equal distribution electrolyte flow channel in entire flow channel structure, similar to the liquid one-way flow principle of Tesla valve, but cannot be completely same with Tesla valve structure, and the structure has water hammer effect in fluid.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage battery technology, specifically relating to a flow channel structure for a flow battery electrode plate frame that can reduce flow resistance. Background Technology

[0002] The fuel cell stack plays a crucial role in flow batteries, and its performance directly determines the product's competitiveness. Among the factors influencing stack performance parameters, the flow channel is a direction that industry scholars have been exploring. Currently, the design principle of the flow channel on the electrode plate frame of the flow battery stack mainly focuses on solving the flow uniformity of the electrolyte, and research on flow resistance is mostly concentrated on the concentration, viscosity, and other ratios of the electrolyte. However, as a complex, multidisciplinary field of electrochemical energy storage, flow batteries will achieve more significant results by improving multiple aspects. Optimizing flow resistance is not only related to electrolyte materials but also closely related to the structure of the flow channel. This invention will optimize the flow channel structure to reduce the flow resistance of the fuel cell stack. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a flow channel structure for a flow battery electrode plate and frame that can reduce flow resistance, thus reducing the flow resistance of the electrolyte in a single cell.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a flow channel structure for a flow battery electrode plate frame that can reduce flow resistance, comprising a frame plate, an inlet channel and an outlet channel formed on the inner wall of the frame plate, multiple resistance triangles fixedly connected to the inner wall of the frame plate, and a common flow channel formed on the inner wall of the frame plate.

[0005] Through the above technical solution, when the electrolyte is pumped into the fuel cell stack from the inlet channel by a magnetic pump and pumped out to the storage tank from the outlet channel, a cycle operation of the fuel cell stack is formed. When the electrolyte passes through the resistance triangle structure in the electrode plate frame, the flow resistance of the entire electrolyte will be reduced, which improves the efficiency performance of the fuel cell stack and reduces pump consumption. Multiple resistance triangles form a specific and evenly distributed electrolyte flow channel in the entire flow channel structure, which is similar to the unidirectional liquid flow principle of the Tesla valve, but cannot be exactly the same as the Tesla valve structure. This structure also has the water hammer effect in the fluid, which can ensure that the flow resistance caused by the backflow of electrolyte due to gravity is reduced, and no dead zone of electrolyte is formed in the frame plate.

[0006] Preferably, the apex of the plurality of resistance triangles faces the inlet channel, and the base of the triangles faces the outlet channel.

[0007] The above technical solution can achieve a resistance effect. The top of the resistance triangle faces the inlet channel and the bottom faces the outlet channel. This can reduce the inlet area when the electrolyte flows back, thereby preventing backflow.

[0008] Preferably, the plurality of resistance triangles are arranged at equal intervals on the inner sides of the inlet and outlet channels.

[0009] The above technical solution can achieve a uniform flow resistance effect. The uniform distribution of the resistance triangle can ensure even force distribution and avoid dead zones.

[0010] Preferably, the inlet channel is located on the bottom side of the frame plate, the outlet channel is located on the top side of the frame plate, and the structures of the outlet channel and the inlet channel are non-rotationally symmetric.

[0011] The above technical solution can increase the electrolyte flow distance. The structure of the outlet channel and the inlet channel is non-rotationally symmetric, which can increase the electrolyte flow distance.

[0012] Preferably, the frame material is an acid and alkali resistant and corrosion resistant polymer.

[0013] The above technical solution uses acid and alkali resistant and corrosion-resistant polymers such as PP / PE / PVC, and the flow channel can be manufactured through injection molding or machining.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. When the electrolyte is pumped into the fuel cell stack from the inlet channel by a magnetic pump and pumped out to the storage tank from the outlet channel, a cycle operation of the fuel cell stack is formed. When the electrolyte passes through the resistance triangle structure in the electrode plate frame, the overall flow resistance of the electrolyte is reduced, which improves the efficiency of the fuel cell stack and reduces pump consumption. Multiple resistance triangles form a specific and evenly distributed electrolyte flow channel in the entire flow channel structure, which is similar to the unidirectional liquid flow principle of the Tesla valve, but it is not exactly the same as the Tesla valve structure. This structure also has the water hammer effect in the fluid, which can ensure that the flow resistance caused by the backflow of electrolyte due to gravity is reduced, and no dead zone of electrolyte is formed in the frame plate. The top of the resistance triangle faces the inlet channel and the bottom of the triangle faces the outlet channel, which can reduce the inlet area when the electrolyte backflows, thereby preventing backflow.

[0015] 2. The uniform distribution of the resistance triangle ensures even force distribution and avoids dead zones. The non-rotationally symmetrical structure of the outlet and inlet channels increases the flow distance of the electrolyte. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the main three-dimensional structure of this utility model.

[0017] In the diagram: 1. Frame plate; 2. Inlet channel; 3. Outlet channel; 4. Resistance triangle; 5. Common channel. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1: Please see Figures 1-2 This utility model provides a technical solution: a flow battery electrode plate frame flow channel structure that can reduce flow resistance, including a frame plate 1, an inlet channel 2 and an outlet channel 3 on the inner wall of the frame plate 1, a plurality of resistance triangles 4 fixedly connected to the inner wall of the frame plate 1, a common flow channel 5 on the inner wall of the frame plate 1, the top of the plurality of resistance triangles 4 facing the inlet channel 2 and the bottom of the triangles facing the outlet channel 3.

[0020] In this embodiment, when the electrolyte is pumped into the fuel cell stack from the inlet channel 2 by a magnetic pump and pumped out to the storage tank from the outlet channel 3, a cycle operation of the fuel cell stack is formed. When the electrolyte passes through the resistance triangle 4 structure in the electrode plate frame 1, the flow resistance of the entire electrolyte will be reduced, which improves the efficiency performance of the fuel cell stack and reduces pump consumption. Multiple resistance triangles 4 form a specific and evenly distributed electrolyte flow channel in the entire flow channel structure, which is similar to the unidirectional liquid flow principle of the Tesla valve, but cannot be exactly the same as the Tesla valve structure. This structure also has the water hammer effect in the fluid, which can ensure that the flow resistance caused by the backflow of electrolyte due to gravity is reduced, and no dead zone of electrolyte is formed in the frame 1. The top of the resistance triangle 4 faces the inlet channel 2, and its bottom faces the outlet channel 3, which can reduce the inlet area when the electrolyte backflows, thereby preventing backflow.

[0021] Example 2: Please see Figures 1-2 Based on Embodiment 1, this utility model provides a technical solution: multiple resistance triangles 4 are arranged equidistantly on the inner sides of the inlet channel 2 and the outlet channel 3, the inlet channel 2 is located on the bottom side of the frame plate 1, and the outlet channel 3 is located on the top side of the frame plate 1. The structures of the outlet channel 3 and the inlet channel 2 are non-rotationally symmetric.

[0022] In this embodiment, the resistance triangles 4 are evenly distributed, which can make the force uniform and avoid dead zones. The structures of the outlet channel 2 and the inlet channel 3 are non-rotationally symmetric, which can increase the flow distance of the electrolyte.

[0023] Example 3: Please see Figures 1-2Based on Embodiment 1 and Embodiment 2, this utility model provides a technical solution: the frame plate 1 is made of an acid and alkali resistant and corrosion-resistant polymer.

[0024] In this embodiment, the material is an acid and alkali resistant and corrosion resistant polymer such as PP / PE / PVC, and the flow channel can be manufactured by injection molding or machining.

[0025] The working principle and usage process of this utility model are as follows: When the electrolyte is pumped into the fuel cell stack from the inlet channel 2 by a magnetic pump and pumped out to the storage tank from the outlet channel 3, a cycle operation of the fuel cell stack is formed. When the electrolyte passes through the resistance triangle 4 structure in the electrode plate frame 1, the flow resistance of the entire electrolyte is reduced, which improves the efficiency performance of the fuel cell stack and reduces pump consumption. Multiple resistance triangles 4 form a specific and evenly distributed electrolyte flow channel in the entire flow channel structure, which is similar to the unidirectional liquid flow principle of a Tesla valve, but cannot be exactly the same as the Tesla valve structure. This structure also has the water hammer effect in the fluid, which can ensure the electrolyte flow. The flow resistance caused by the backflow of electrolyte due to gravity is reduced, and no dead zone of electrolyte is formed in the frame plate 1. The top of the resistance triangle 4 faces the inlet channel 2, and the bottom of the triangle faces the outlet channel 3. This can reduce the inlet area when the electrolyte backflows, thereby preventing backflow. The resistance triangle 4 is evenly distributed, which can make the force uniform and avoid dead zones. The structure of the outlet channel 3 and the inlet channel 2 is non-rotationally symmetric, which can increase the flow distance of the electrolyte. The material is an acid and alkali resistant and corrosion resistant polymer such as PP / PE / PVC. The flow channel can be manufactured by injection molding or machining.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flow cell electrode plate frame flow channel structure with reduced flow resistance, comprising a frame plate (1), characterized in that: The inner wall of the frame plate (1) is provided with an inlet channel (2), the inner wall of the frame plate (1) is provided with an outlet channel (3), the inner wall of the frame plate (1) is fixedly connected with multiple resistance triangles (4), and the inner wall of the frame plate (1) is provided with a common channel (5).

2. The flow channel structure for a flow battery electrode plate and frame that reduces flow resistance according to claim 1, characterized in that: The tops of the multiple resistance triangles (4) face the inlet channel (2), and the bottoms of the triangles face the outlet channel (3).

3. The flow channel structure for a flow battery electrode plate and frame that reduces flow resistance according to claim 2, characterized in that: Multiple resistance triangles (4) are arranged at equal intervals on the inner sides of the inlet channel (2) and the outlet channel (3).

4. The flow channel structure for a flow battery electrode plate and frame that reduces flow resistance according to claim 1, characterized in that: The inlet channel (2) is located on the bottom side of the frame plate (1), and the outlet channel (3) is located on the top side of the frame plate (1). The structures of the outlet channel (3) and the inlet channel (2) are non-rotationally symmetric.

5. The flow channel structure for a flow battery electrode plate and frame that reduces flow resistance according to claim 1, characterized in that: The frame plate (1) is made of an acid and alkali resistant and corrosion resistant polymer.

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