Bipolar plate structure

Abstract

The utility model discloses a bipolar plate structure which comprises a bipolar plate main body, the bipolar plate main body is a plate with a rectangular structure, a reaction runner is arranged on one side of the bipolar plate main body, a fixed frame is arranged on the bipolar plate main body, and the bipolar plate main body is a plate with a rectangular structure; the utility model relates to the technical field of flow batteries, a bipolar plate structure, a bipolar plate material and a reaction flow channel only correspond to an electrode area, the outer part of the bipolar plate material is connected with an integrated fixed frame, and a bipolar plate main body and the fixed frame can be integrally detached and replaced during daily maintenance and replacement; during fine maintenance, the bipolar plate main body and the fixed frame can be quickly separated, the structure is simple, the disassembly and replacement operation is convenient, the application area of a bipolar plate material can be reduced due to the existence of the fixed frame, and more materials are saved due to loss replacement of the bipolar plate.

Description

Technical Field

[0001] This utility model relates to the field of flow battery technology, specifically a bipolar plate structure. Background Technology

[0002] In modern flow battery applications, bipolar plates are important components that isolate individual cells. In current applications, bipolar plates need to be in contact with the electrodes and one side of the electrode frame.

[0003] However, during use, since the bipolar plate needs to be placed on the outside of the electrode, a flow channel needs to be opened on it to allow the electrolyte to pass through. In addition, the outside of the bipolar plate needs to be sealed by a sealing frame. However, this structure requires the complete removal of the sealing frame and the bipolar plate during disassembly and assembly, which makes disassembly and assembly inconvenient. In view of this, in-depth research was conducted on the above problems, which led to this case. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a bipolar plate structure, which solves the existing background technology problems.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a bipolar plate structure, including a bipolar plate body, wherein the bipolar plate body is a rectangular plate, a reaction channel is provided on one side of the bipolar plate body, and a fixing frame is provided on the bipolar plate body;

[0006] The fixed frame is a rectangular frame with a mounting groove on one side. The bipolar plate body is embedded in the mounting groove. The fixed frame is provided with inlet and outlet channels that connect to the reaction channel. The fixed frame is provided with liquid inlet and liquid outlet that are respectively connected to the two ends of the inlet and outlet channels.

[0007] The bipolar plate body has an embedding groove, and a connecting rod extends from the fixing frame and is connected to the embedding groove. The head end of the connecting rod has a threaded hole, and a fixing bolt is threaded to one side of the bipolar plate body. The fixing bolt and the connecting rod are pulled against each other on both sides of the bipolar plate body.

[0008] One side of the bipolar plate body is provided with an extended current collector, and the fixed frame is provided with a limiting groove that matches the current collector.

[0009] Preferably, the embedding groove is a cylindrical through hole, and the connecting rod is a cylindrical plate that matches the diameter of the embedding groove.

[0010] Preferably, the outer side of the fixed frame is provided with two pairs of connecting holes symmetrically.

[0011] Preferably, the side of the bipolar plate body is provided with an installation bevel, the installation groove is a socket-type structure, and the installation bevel matches the shape of the installation groove.

[0012] Preferably, the current collector plate has an L-shaped structure, and a through groove is provided on the fixed frame, through which one end of the current collector plate passes.

[0013] Preferably, the fixed frame is provided with a pair of weight-reducing grooves.

[0014] Beneficial effects

[0015] This invention provides a bipolar plate structure. It offers the following advantages: In this bipolar plate structure, the bipolar plate material and its reaction channel correspond only to the electrode area. An integrated fixing frame connects the bipolar plate material to the outside, allowing for seamless replacement of the bipolar plate body and fixing frame during routine maintenance. For detailed maintenance, the bipolar plate body and fixing frame can be quickly separated. The structure is simple, and replacement is convenient. Furthermore, the fixing frame reduces the application area of ​​the bipolar plate material, making replacement more material-efficient. Attached Figure Description

[0016] Figure 1 This is a front view schematic diagram of a bipolar plate structure according to the present invention.

[0017] Figure 2 This is a rear view schematic diagram of the bipolar plate structure described in this utility model.

[0018] Figure 3 This is a schematic diagram of the blasting structure of the bipolar plate structure described in this utility model.

[0019] In the diagram: 1. Bipolar plate body; 2. Fixing frame; 11. Reaction channel; 12. Embedding groove; 13. Collector plate; 21. Mounting groove; 22. Inlet and outlet channels; 23. Liquid inlet hole; 24. Liquid outlet hole; 25. Connecting rod; 26. Fixing bolt; 27. Connecting hole; 28. Weight reduction groove. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-3This utility model provides an implementation scheme: In modern flow batteries, bipolar plates are an important component. In order to improve the reaction efficiency and electron conduction efficiency of the electrolyte, current bipolar plate structures often have flow channels opened on the bipolar plates. In order to maintain the structural integrity of the flow channels, the bipolar plates are often an integral structure. Current bipolar plates need to be sealed with a sealing frame, which makes disassembly and assembly inconvenient due to the large number of parts.

[0022] To address the above issues, please refer to the appendix to the instruction manual. Figure 1-3 As can be seen, this application discloses a bipolar plate structure, including a bipolar plate body 1, which is a rectangular plate. A reaction channel 11 is provided on one side of the bipolar plate body 1. The reaction channel 11 adopts a serpentine or S-shaped structure design. The reaction channel 11 corresponds to one side of the electrode, and the electrolyte flows into one side of the electrode. In order to facilitate the installation of the bipolar plate body 1, a fixing frame 2 is provided on the bipolar plate body 1.

[0023] According to the instruction manual Figure 1-3 As can be seen, the bipolar plate body 1 is a rectangular plate, and the fixing frame 2 is a rectangular frame. The fixing frame 2 is fitted onto one side of the bipolar plate body 1. Specifically, an installation groove 21 is provided on one side of the fixing frame 2. The bipolar plate body 1 is embedded in the installation groove 21. The installation groove 21 serves to install and limit the bipolar plate body 1. Furthermore, an inlet and outlet flow channel 22 is provided on the fixing frame 2 to connect to the reaction flow channel 11. An inlet hole 23 and an outlet hole 24 are provided on the fixing frame 2 to connect to the two ends of the inlet and outlet flow channel 22 respectively. The inlet and outlet flow channel 22 on the fixing frame 2 serves to connect to and divert the feed channel. Furthermore, the feed end and discharge end of the flow battery are connected through the inlet hole 23 and the outlet hole 24 respectively, so that the electrolyte flows into the reaction flow channel 11 from the inlet flow channel through the inlet hole 23. The electrolyte after electrolysis flows back to the outlet hole 24 from the inlet and outlet flow channel 22 and is discharged.

[0024] According to the instruction manual Figure 1-3 As can be seen, the bipolar plate body 1 is provided with an embedding groove 12, and a connecting rod 25 extends from the fixing frame 2 and is connected to the embedding groove 12. The head end of the connecting rod 25 is provided with a threaded hole, and a fixing bolt 26 is threadedly connected to one side of the bipolar plate body 1. The fixing bolt 26 and the connecting rod 25 are pulled against each other on both sides of the bipolar plate body 1. The fixing bolt 26 is connected to the connecting rod 25, which serves to limit the bipolar plate body 1. The mutual limitation between the connecting rod 25 and the embedding groove 12 also limits the bipolar plate body 1, so that the bipolar plate body 1 and the fixing frame 2 together constitute a complete bipolar plate. In the application of the single battery pack of the flow battery, the fixing frame 2 is used for connection and installation.

[0025] A current collector 13 extends from one side of the bipolar plate body 1. A limiting groove matching the current collector 13 is provided on the fixing frame 2. The current collector 13 is used to integrate the power of the bipolar plate. The material of the fixing frame 2 is different from that of the bipolar plate body 1. However, the fixing frame 2 and the bipolar plate body 1 are connected by a connecting rod 25. During routine maintenance and replacement, the bipolar plate body 1 and the fixing frame 2 can be replaced as a whole. During fine maintenance, the bipolar plate body 1 and the fixing frame 2 can also be quickly separated.

[0026] As a preferred option, the embedded groove 12 is a cylindrical through hole, and the connecting rod 25 is a cylindrical plate that matches the diameter of the embedded groove 12. The embedded groove 12 limits the connecting rod 25 axially and radially, thereby limiting the bipolar plate body 1.

[0027] As a preferred option, the outer side of the fixing frame 2 is symmetrically provided with two pairs of connecting holes 27 for the screw to pass through during the assembly of the single battery pack of the flow battery.

[0028] As a preferred option, the bipolar plate body 1 is further provided with an installation bevel on its side, and the installation groove 21 is a socket-type structure. The installation bevel matches the shape of the installation groove 21, and the socket-type matching of the bipolar plate body 1 and the installation groove 21 plays a role in pushing and pulling the bipolar plate body 1.

[0029] As a preferred option, the collector plate 13 is further designed to be L-shaped, with a through slot on the fixed frame 2, through which one end of the collector plate 13 passes.

[0030] As a preferred option, the fixed frame 2 is further provided with a pair of weight-reducing grooves 28 to reduce the structural weight of the fixed frame 2.

[0031] In summary, this bipolar plate structure has bipolar plate material and its reaction channel 11 that only correspond to the electrode area. The bipolar plate material is externally connected to an integrated fixing frame 2. During routine maintenance and replacement, the bipolar plate body 1 and the fixing frame 2 can be replaced as a whole. During detailed maintenance, the bipolar plate body 1 and the fixing frame 2 can also be quickly separated. The structure is simple, the replacement operation is convenient, and the presence of the fixing frame 2 can reduce the application area of ​​the bipolar plate material, making the replacement of the bipolar plate more material-efficient.

[0032] 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 bipolar plate structure comprising a bipolar plate body (1) which is a plate piece of a rectangular structure, one side of the bipolar plate body (1) being provided with a reaction flow channel (11), characterized in that, The bipolar plate body (1) is provided with a fixed frame (2); The fixed frame (2) is a rectangular structure frame, one side of the fixed frame (2) is provided with a mounting groove (21), the bipolar plate body (1) is embeddedly connected in the mounting groove (21), the fixed frame (2) is provided with an inlet-outlet flow channel (22) communicated to the reaction flow channel (11), the fixed frame (2) is provided with an inlet hole (23) and an outlet hole (24) respectively communicated with both ends of the inlet-outlet flow channel (22); The bipolar plate body (1) is provided with an embedded groove (12), the fixed frame (2) extends a connecting rod (25) connected in the embedded groove (12), the head end of the connecting rod (25) is provided with a threaded hole, one side of the bipolar plate body (1) is threadedly connected with a fixing bolt (26), the fixing bolt (26) and the connecting rod (25) are oppositely arranged on both sides of the bipolar plate body (1); One side of the bipolar plate body (1) is provided with an extended current collecting sheet (13), the fixed frame (2) is provided with a limiting groove matched with the current collecting sheet (13).

2. A bipolar plate structure according to claim 1, characterized in that The embedded groove (12) is a cylindrical through hole, and the connecting rod (25) is a plate with a cylindrical structure matched with the diameter of the embedded groove (12).

3. A bipolar plate structure according to claim 2, characterised in that The outer side of the fixed frame (2) is symmetrically provided with two pairs of connecting holes (27).

4. A bipolar plate structure according to claim 3, characterised in that The side surface of the bipolar plate body (1) is provided with a mounting slope, the mounting groove (21) is a socket type structure, and the mounting slope is matched with the mounting groove (21).

5. A bipolar plate structure according to claim 4, characterised in that The current collecting sheet (13) is an L-shaped structure, the fixed frame (2) is provided with a through groove, and one end of the current collecting sheet (13) passes through the through groove.

6. A bipolar plate structure according to claim 5, characterised in that The fixed frame (2) is provided with a pair of weight reduction grooves (28).

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