Electrode plate frame structure of flow battery

Abstract

The invention relates to the field of flow batteries, in particular to an electrode plate frame structure of a flow battery. The electrode plate frame structure of the redox flow battery comprises a runner plate frame and an auxiliary plate frame, a clamping groove used for wrapping the periphery of a bipolar plate is formed in the inner edge of the binding face of the runner plate frame and the auxiliary plate frame, and a hot melt adhesive film used for fixing the bipolar plate is arranged in the clamping groove. Based on the structure, the inner edge of the faying face of the runner plate frame and the auxiliary plate frame is provided with a clamping groove used for wrapping the periphery of the bipolar plate, and a hot melt adhesive film used for fixing the bipolar plate is arranged in the clamping groove. And the bipolar plate is coated between the runner plate frame and the auxiliary plate frame, so that erosion corrosion caused by electrolyte flowing is avoided. And the structural design that the hot melt adhesive film is arranged in the clamping groove can be compatible with connection processes such as laser welding and hot melting, so that the source of raw materials of the stack is wider, and the universality is higher.

Description

Technical Field

[0001] This application relates to the field of flow battery technology, and in particular to an electrode plate and frame structure for a flow battery. Background Technology

[0002] A flow battery stack consists of multiple individual cells connected in series. Electrode frames and bipolar plates are fixedly fitted together to separate adjacent cells. Their structural design and connection process directly affect the stack's performance and lifespan. Existing electrode frame connection processes need to be adapted to bipolar plates of different materials. For example, composite graphite bipolar plates are laser-welded, while flexible graphite bipolar plates are bonded with hot-melt adhesive film. This results in poor versatility and cannot meet the assembly requirements of bipolar plates made of various materials. Furthermore, existing electrode frames lack effective protection for the bipolar plates, making them susceptible to corrosion from electrolyte erosion during stack operation. Summary of the Invention

[0003] The purpose of this application is to provide a flow battery electrode plate frame structure, which aims to solve the problems of insufficient versatility and lack of protection function of the electrode plate frame in the prior art.

[0004] To achieve the above objectives, this application adopts the following technical solution: A flow battery electrode plate frame structure includes a flow channel plate frame and an auxiliary plate frame. The inner edge of the mating surface of the flow channel plate frame and the auxiliary plate frame is provided with a slot for covering the outer periphery of the bipolar plate. A hot melt adhesive film for fixing the bipolar plate is provided in the slot.

[0005] Furthermore, the flow channel frame and the auxiliary frame are stacked and fixed together.

[0006] Furthermore, the flow channel frame and auxiliary frame are constructed as plate-shaped frames with adapted shapes.

[0007] Furthermore, the card slot is formed on the auxiliary plate frame.

[0008] Furthermore, a flow channel is provided on the side of the flow channel plate frame facing away from the card slot.

[0009] Furthermore, the flow channel extends along the longitudinal direction of the flow channel plate frame.

[0010] Furthermore, the flow channels are arranged in a rotationally symmetrical manner on the flow channel plate frame.

[0011] Furthermore, two symmetrical branches are provided at the ends of the flow channel.

[0012] Furthermore, the branch circuit has an integrally formed diversion block inside.

[0013] Furthermore, the diversion blocks are distributed at intervals along the extension direction of the branch.

[0014] Beneficial Effects: This application improves upon existing electrode plate frames. A groove for covering the outer periphery of the bipolar plate is provided on the inner edge of the mating surface of the flow channel plate frame and the auxiliary plate frame. A hot-melt adhesive film for fixing the bipolar plate is placed within the groove. The bipolar plate is covered within the groove between the flow channel plate frame and the auxiliary plate frame, avoiding erosion and corrosion caused by electrolyte flow. The structural design of the hot-melt adhesive film within the groove is compatible with laser welding and hot-melt bonding processes, broadening the source of raw materials for the fuel cell stack and enhancing its versatility. Attached Figure Description

[0015] Exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be understood that the embodiments described below are for illustrative purposes only and are not intended to limit the scope of this application. In the accompanying drawings: Figure 1 A schematic diagram of the electrode plate and frame structure of the flow battery provided in this application; Figure 2 A front view of the flow battery electrode plate frame structure provided in this application; Figure 3 An exploded view of the flow battery electrode plate and frame structure provided in this application; The following are the labeling elements in the figure: 10. Flow channel plate frame; 11. Flow channel; 12. Branch path; 13. Flow divider block; 20. Auxiliary frame; 21. Fitting surface; 22. Slot; 23. Relief slot; 30. Bipolar plate; 31. Voltage test tab. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description of this application is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this application and are not intended to limit this application.

[0017] The design concept of the flow battery electrode plate frame structure described in this application is as follows: A flow battery electrode plate frame structure includes a flow channel plate frame 10 and an auxiliary plate frame 20. The inner edge of the mating surface 21 of the flow channel plate frame 10 and the auxiliary plate frame 20 is provided with a groove 22 for covering the outer periphery of the bipolar plate 30. A hot melt adhesive film for fixing the bipolar plate 30 is provided in the groove 22.

[0018] In the above structure, the bipolar plate 30 is encased in the slot 22 between the flow channel frame 10 and the auxiliary frame 20, avoiding erosion and corrosion caused by electrolyte flow. The structural design of setting a hot melt adhesive film in the slot 22 can accommodate laser welding and hot melt bonding processes, making the raw material sources of the fuel cell stack more diverse and its versatility stronger.

[0019] An embodiment of the flow battery electrode plate and frame structure described in this application: Please see Figures 1 to 3 A flow battery bipolar plate adapter structure includes a flow channel frame 10 and an auxiliary frame 20. The inner edge of the mating surface 21 of the flow channel frame 10 and the auxiliary frame 20 is provided with a slot 22 for covering the outer periphery of the bipolar plate 30. A hot melt adhesive film for fixing the bipolar plate is provided in the slot 22.

[0020] The flow channel plate frame 10 is constructed as a rectangular plate-shaped frame. The central area of ​​the flow channel plate frame 10 is a cavity structure. Flow channels 11 are provided on the upper and lower sides of the front sidewall of the flow channel plate frame 10. The flow channels 11 are used to transport electrolyte.

[0021] The flow channel 11 extends along the longitudinal direction of the flow channel frame 10, and the flow channels 11 on the upper and lower sides are arranged in rotational symmetry on the flow channel frame 10. The flow channel 11 forms two branches 12 on the inner edge of the flow channel frame 10, and the two branches 12 are located on the same straight line, which is parallel to the flow channel 11. The two branches 12 are arranged symmetrically on both sides of the end of the flow channel 11.

[0022] Branch 12 has an integrally formed diverter block 13 inside, and the diverter blocks 13 are distributed at intervals along the extension direction of the branch. The diverter blocks 13 are used to divert the flow of electrolyte, so that the distribution of electrolyte is more uniform.

[0023] It should be noted that the one-piece molded flow divider structure used in this application simplifies the process and improves fuel cell stack production efficiency compared to welding a cover plate at the flow channel opening in the prior art.

[0024] The auxiliary plate frame 20 is constructed as a plate-shaped frame that is adapted to the shape of the flow channel plate frame 10. The auxiliary plate frame 20 and the flow channel plate frame 10 are stacked and fixed. The slot 22 is formed on the mating surface 21 of the auxiliary plate frame 20 and the flow channel plate frame 10. The slot 22 is used to snap the bipolar plate 30 with the adapted shape.

[0025] The slot 22 has a hot melt adhesive film inside, which is used to fix the bipolar plate 30 inside the slot 22.

[0026] It should be noted that a voltage test tab 31 protruding outward is provided on one side of the bipolar plate 30, and a relief groove 23 for placing the voltage test tab 31 is provided on the mating surface 21 of the auxiliary plate frame 20. The voltage test tab 31 is used to measure the voltage of a single cell, which can facilitate the identification of problems in the battery stack.

[0027] It should be understood that a slot 22 for covering the outer periphery of the bipolar plate 30 is provided on the inner edge of the mating surface 21 of the flow channel frame 10 and the auxiliary frame 20, and a hot melt adhesive film for fixing the bipolar plate 30 is provided in the slot 22, so that the bipolar plate 30 is covered in the slot 22 between the flow channel frame 10 and the auxiliary frame 20, avoiding erosion and corrosion caused by electrolyte flow. At the same time, the structural design of the hot melt adhesive film in the slot 22 can be compatible with laser welding and hot melt connection processes, making the raw material sources of the fuel cell stack more extensive and more versatile.

[0028] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A flow battery electrode plate and frame structure, characterized in that, It includes a flow channel plate frame and an auxiliary plate frame. The inner edge of the mating surface of the flow channel plate frame and the auxiliary plate frame is provided with a slot for covering the outer periphery of the bipolar plate. The slot is provided with a hot melt adhesive film for fixing the bipolar plate.

2. The flow battery electrode plate and frame structure according to claim 1, characterized in that, The flow channel frame and the auxiliary frame are stacked and fixed together.

3. The flow battery electrode plate and frame structure according to claim 1, characterized in that, The flow channel frame and the auxiliary frame are constructed as a plate-shaped frame with a suitable shape.

4. The flow battery electrode plate and frame structure according to claim 1, characterized in that, The slot is formed on the auxiliary plate frame.

5. The flow battery electrode plate and frame structure according to claim 1, characterized in that, The flow channel plate frame has a flow channel on the side facing away from the slot.

6. The flow battery electrode plate and frame structure according to claim 5, characterized in that, The flow channel extends along the longitudinal direction of the flow channel plate frame.

7. The flow battery electrode plate and frame structure according to claim 6, characterized in that, The flow channels are arranged in a rotationally symmetrical manner on the flow channel plate frame.

8. The flow battery electrode plate and frame structure according to claim 7, characterized in that, The flow channel has two symmetrical branches at its ends.

9. The flow battery electrode plate and frame structure according to claim 8, characterized in that, The branch circuit has an integrally formed diversion block inside.

10. The flow battery electrode plate and frame structure according to claim 9, characterized in that, The diversion blocks are distributed at intervals along the extension direction of the branch.

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