Electrode graphite felt of flow battery

Abstract

The utility model relates to the technical field of graphite felts, and discloses a flow battery electrode graphite felt, which comprises a diaphragm, a large electrode adhesive is arranged on the outer wall of the diaphragm, a narrow graphite felt end is arranged on the left side of the diaphragm, a wide graphite felt end is arranged on the outer wall of the narrow graphite felt end, a mounting frame is sleeved on the outer wall of the narrow graphite felt end, and the large electrode adhesive is arranged on the outer wall of the mounting frame. According to the flow battery electrode graphite felt, the diaphragm on the device is matched with the narrow graphite felt end, the wide graphite felt end and the large electrode glue for use, so that the flow battery electrode graphite felt is more uniform in flow, and the flow battery electrode graphite felt is more uniform in flow. When electrons and ions appearing due to redox reaction in the positive electrode direction of the narrow graphite felt end on the device need to penetrate through the diaphragm to enter a negative electrode environment on the other side, the wide graphite felt end is used for expanding the output area of the output end of the narrow graphite felt end, so that circulation of the electrons and the ions is accelerated, and the receiving area of the receiving end is expanded on the other side; and accelerated circulation on the two sides is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of graphite felt, in particular to a graphite felt for a flow battery electrode. Background Technique

[0002] Graphite felt is divided into three types: pitch-based graphite felt, polyacrylonitrile-based (PAN-based) graphite felt, and viscose-based graphite felt according to the different original felts. Its main uses are as heat preservation and heat insulation materials for single crystal silicon smelting furnaces and as filtering materials for high-purity corrosive chemical reagents in the chemical industry.

[0003] When the existing device is in use, the electrode graphite felt usually used in a flow battery has the same size on both sides of the positive and negative electrodes. This makes the output rate and reception rate of electrons and ions between the positive and negative electrodes the same, and both sides work at the same rate. However, when the flow battery needs to increase the conductive power, it is necessary to increase the output at the output end and synchronously increase the reception at the other receiving end. In order to avoid changing the conduction diameter and causing changes in the flow rates of electrons and ions without increasing the size of the electrode graphite felt, a graphite felt for a flow battery electrode that solves the above problems is needed. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the utility model provides a graphite felt for a flow battery electrode, which has the advantages of expanding the transmission and reception surface and accelerating conduction, and solves the problems raised in the above background technique.

[0005] The utility model provides the following technical scheme: a graphite felt for a flow battery electrode, including a diaphragm, a large electrode glue is arranged on the outer wall of the diaphragm, a narrow graphite felt end is arranged on the left side of the diaphragm, a wide graphite felt end is opened on the outer wall of the narrow graphite felt end, an installation frame is sleeved on the outer wall of the narrow graphite felt end, a small electrode glue is filled on the outer wall of the narrow graphite felt end, a bipolar plate is installed on the left side of the installation frame, a current collector housing is installed on the left side of the bipolar plate, a current collector plate is sleeved in the inner cavity of the current collector housing, an end plate is installed on the left side of the current collector housing, a liquid flow port is arranged on the outer wall of the end plate, and a screw is threadedly connected to the inner wall of the end plate.

[0006] As a preferred technical scheme of the utility model, the large electrode glue and the small electrode glue are prepared from acid-resistant resin, and the large electrode glue is smeared on both sides of the outer wall of the diaphragm.

[0007] As a preferred technical scheme of the utility model, the smearing area of the large electrode glue is the same as the area of the wide graphite felt end, and the wide graphite felt end is arranged on the side of the narrow graphite felt end close to the diaphragm.

[0008] As a preferred technical solution of the present utility model, the outer wall diameter of the small electrode glue is the same as that of the outer wall diameter of the narrow graphite felt end, and the small electrode glue is between the bipolar plate and the narrow graphite felt end.

[0009] As a preferred technical solution of the present utility model, a connecting piece is fixedly connected to the outer wall of the current collector plate, and the current collector plate is in contact with the external positive and negative switching connecting head through the connecting piece.

[0010] As a preferred technical solution of the present utility model, the number of the end plates is two, and the two end plates are connected by screw threads.

[0011] Compared with the prior art, the present utility model has the following beneficial effects:

[0012] 1. For the graphite felt of the flow battery electrode, through the mutual cooperation of the diaphragm, narrow graphite felt end, wide graphite felt end, and large electrode glue on the device, when the electrons and ions that appear due to the redox reaction at the narrow graphite felt end in the positive electrode direction need to pass through the diaphragm and enter the negative electrode environment on the other side, the output area of the narrow graphite felt end is expanded by using the wide graphite felt end, so that the electrons and ions can flow faster, and the receiving area of the receiving end is enlarged on the other side to ensure the accelerated flow on both sides.

[0013] 2. For the graphite felt of the flow battery electrode, through the mutual cooperation of the current collector plate, current collector housing, bipolar plate, small electrode glue, and narrow graphite felt end on the device, the bipolar plate is closely attached to the narrow graphite felt end through the small electrode glue during the charge and discharge process of the battery, and the effective conduction of current is realized by using the bipolar plate and the narrow graphite felt end. Moreover, the conduction diameter is reduced at the narrow graphite felt end to concentrate the output of energy. When the current collector plate on the device contacts the bipolar plate in the inner cavity of the current collector housing, it is connected to the external positive and negative switching connecting head through the connecting piece, so that the positive and negative currents inside the device are connected to the external electrolyte container. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional structure schematic diagram of the present utility model;

[0015] Figure 2 is a three-dimensional sectional structure schematic diagram of the present utility model;

[0016] Figure 3 is the present utility model Figure 2 is an enlarged schematic diagram of the structure at A in;

[0017] Figure 4 is a schematic diagram of the current collector plate structure of the present utility model;

[0018] Figure 5 is a schematic diagram of the small electrode glue structure of the present utility model.

[0019] In the figure: 1. diaphragm; 2. large electrode glue; 3. narrow graphite felt end; 4. wide graphite felt end; 5. mounting frame; 6. small electrode glue; 7. bipolar plate; 8. current collector housing; 9. current collector plate; 10. end plate; 11. liquid flow port; 12. screw. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-5 , a graphite felt for a flow battery electrode, including a diaphragm 1. A large electrode glue 2 is provided on the outer wall of the diaphragm 1. A narrow graphite felt end 3 is provided on the left side of the diaphragm 1. A wide graphite felt end 4 is opened on the outer wall of the narrow graphite felt end 3. A mounting frame 5 is sleeved on the outer wall of the narrow graphite felt end 3. A small electrode glue 6 is filled on the outer wall of the narrow graphite felt end 3. A bipolar plate 7 is installed on the left side of the mounting frame 5. A current collector housing 8 is installed on the left side of the bipolar plate 7. A current collector plate 9 is sleeved in the inner cavity of the current collector housing 8. An end plate 10 is installed on the left side of the current collector housing 8. A liquid flow port 11 is provided on the outer wall of the end plate 10. A screw 12 is threadedly connected to the inner wall of the end plate 10. By the mutual cooperation of the diaphragm 1, the narrow graphite felt end 3, the wide graphite felt end 4, and the large electrode glue 2 on the device, when electrons and ions that appear in the positive electrode direction due to the redox reaction on the narrow graphite felt end 3 of the device need to pass through the diaphragm 1 and enter the negative electrode environment on the other side, the output area of the narrow graphite felt end 3 is expanded by using the wide graphite felt end 4, so that electrons and ions can flow faster, and the receiving area of the receiving end is expanded on the other side to ensure the accelerated flow on both sides.

[0022] In a preferred embodiment, the large electrode glue 2 and the small electrode glue 6 are prepared from acid-resistant resin, and the large electrode glue 2 is applied to both outer walls of the diaphragm 1. Due to the fact that the large electrode glue 2 and the small electrode glue 6 on the device are made of acid-resistant resin, the large electrode glue 2 and the small electrode glue 6 on the device have the characteristics of reducing the electrode and improving the overall conductivity of the battery, so that the large electrode glue 2 on the device can accelerate the electrochemical reaction rate on both sides of the diaphragm 1.

[0023] In a preferred embodiment, the coating area of the large electrode adhesive 2 is the same as the area of the wide graphite felt end 4, and the wide graphite felt end 4 is arranged on the side of the narrow graphite felt end 3 close to the diaphragm 1. By making the coating area of the large electrode adhesive 2 on the device the same as the area of the wide graphite felt end 4, when the large electrode adhesive 2 on the device is coated on the surface of the wide graphite felt end 4 or on the side of the outer wall of the diaphragm 1 facing the wide graphite felt end 4, due to the same area of the large electrode adhesive 2 and the wide graphite felt end 4, after the electrolyte undergoes a redox reaction catalyzed by the positive electrode on the wide graphite felt end 4 with the large electrode adhesive 2, the large electrode adhesive 2 is used to make the wide graphite felt end 4 closely fit with the diaphragm 1, accelerating the passage of electrons and ions through the graphite felt into the negative electrode of the battery. Furthermore, the wide graphite felt end 4 is used to expand the output area or the receiving area of the output end or the receiving end of the narrow graphite felt end 3.

[0024] In a preferred embodiment, the outer wall diameter of the small electrode adhesive 6 is the same as the outer wall diameter of the narrow graphite felt end 3, and the small electrode adhesive 6 is located between the bipolar plate 7 and the narrow graphite felt end 3. By making the outer wall diameter of the small electrode adhesive 6 on the device the same as the outer wall diameter of the narrow graphite felt end 3, the bipolar plate 7 on the device is made to closely adhere to the narrow graphite felt end 3 using the small electrode adhesive 6, and the current conduction speed between the bipolar plate 7 and the narrow graphite felt end 3 is further increased, thus realizing the rapid output and utilization of energy.

[0025] In a preferred embodiment, a connecting piece is fixedly connected to the outer wall of the current collector plate 9, and the current collector plate 9 is in contact with the external positive and negative switching connecting head through the connecting piece. By fixedly connecting a connecting piece to the outer wall of the current collector plate 9 on the device, when the current collector plate 9 on the device is installed in the inner cavity of the current collector housing 8, the connecting piece is used to contact the external positive and negative switching connecting head, thereby connecting the positive and negative electrode currents inside the device to the external electrolyte container.

[0026] In a preferred embodiment, the number of end plates 10 is two, and the screw 12 is threadedly connected to the two end plates 10. By means of the two end plates 10 on the device, the end plates 10 on the device clamp the core components at the outermost side position of the battery pack, and the screw 12 is threadedly connected to the end plates 10 on both sides, thereby enabling the end plates 10 on the device to clamp the positive and negative electrode components in the middle at both sides.

[0027] Working principle: First, through the combined use of diaphragm 1, narrow graphite felt end 3, wide graphite felt end 4, and large electrode glue 2 on the device, when electrons and ions that appear due to redox reactions at the narrow graphite felt end 3 of the device in the positive electrode direction need to pass through diaphragm 1 and enter the negative electrode environment on the other side, the output area of the narrow graphite felt end 3 is expanded by the wide graphite felt end 4, so as to accelerate the flow of electrons and ions, and the receiving area of the receiving end is enlarged on the other side to ensure the accelerated flow on both sides. Then, through the combined use of current collector plate 9, current collector housing 8, bipolar plate 7, small electrode glue 6, and narrow graphite felt end 3 on the device, the bipolar plate 7 on the device is closely attached to the narrow graphite felt end 3 through the small electrode glue 6 during the charge and discharge process of the battery, and the effective conduction of current is realized by using the bipolar plate 7 and the narrow graphite felt end 3, and the conduction diameter is reduced at the narrow graphite felt end 3 to concentrate the output of energy. Thus, when the current collector plate 9 on the device contacts the bipolar plate 7 in the inner cavity of the current collector housing 8, it is connected to the positive and negative closing connectors outside through the connecting piece, and further connects the positive and negative currents inside the device to the external electrolyte container.

[0028] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A graphite felt for a flow battery electrode, comprising a separator (1), characterized in that: The outer wall of the diaphragm (1) is provided with a large electrode glue (2). A narrow graphite felt end (3) is provided on the left side of the diaphragm (1). A wide graphite felt end (4) is formed on the outer wall of the narrow graphite felt end (3). An installation frame (5) is sleeved on the outer wall of the narrow graphite felt end (3). A small electrode glue (6) is filled on the outer wall of the narrow graphite felt end (3). A bipolar plate (7) is installed on the left side of the installation frame (5). A current collector housing (8) is installed on the left side of the bipolar plate (7). A current collector plate (9) is sleeved in the inner cavity of the current collector housing (8). An end plate (10) is installed on the left side of the current collector housing (8). A liquid flow port (11) is provided on the outer wall of the end plate (10). A screw (12) is threadedly connected to the inner wall of the end plate (10).

2. The graphite felt for a flow battery electrode according to claim 1, wherein: The large electrode glue (2) and the small electrode glue (6) are prepared from acid-resistant resin, and the large electrode glue (2) is applied to both sides of the outer wall of the diaphragm (1).

3. A graphite felt for a flow battery electrode according to claim 1, characterized in that: The application area of the large electrode glue (2) is the same as the area of the wide graphite felt end (4), and the wide graphite felt end (4) is arranged on the side of the narrow graphite felt end (3) close to the diaphragm (1).

4. A graphite felt for a flow battery electrode according to claim 1, characterized in that: The outer wall diameter of the small electrode glue (6) is the same as the outer wall diameter of the narrow graphite felt end (3), and the small electrode glue (6) is located between the bipolar plate (7) and the narrow graphite felt end (3).

5. A graphite felt for a flow battery electrode according to claim 1, characterized in that: A connecting piece is fixedly connected to the outer wall of the current collector plate (9), and the current collector plate (9) is in contact with an external positive and negative switching connecting head through the connecting piece.

6. The graphite felt for a flow battery electrode according to claim 1, characterized in that: The number of the end plates (10) is two, and the screw (12) is threadedly connected to the two end plates (10).

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