Composite graphite bipolar plate for flow battery

Abstract

The utility model relates to the field of flow batteries, in particular to a composite graphite bipolar plate for a flow battery, which comprises a graphite bipolar plate main body, the graphite bipolar plate main body consists of a cathode plate, an anode plate and a liquid guide plate, and the cathode plate and the anode plate are respectively and symmetrically arranged on two side surfaces of the liquid guide plate in a fitting manner. The composite graphite bipolar plate for the flow battery is designed into the graphite bipolar plate main body consisting of the negative plate, the positive plate and the liquid guide plate, so that when an electrolyte flows through, the flow path of the electrolyte can be effectively increased through the first flow channel, the second flow channel and the third flow channel; and moreover, the flow path is prolonged through a gap generated when the liquid guide plate is overlapped with the cathode plate and the anode plate on the two sides, so that the graphite bipolar plate main body can be more stable when electrolyte flows through the graphite bipolar plate main body.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid flow batteries, in particular to a composite graphite bipolar plate for liquid flow batteries. Background Art

[0002] A flow battery is a special type of battery that differs from traditional batteries because it uses a liquid electrolyte rather than solid materials to store and release electrical energy. Flow batteries are also known as flow battery systems or flow battery technology.

[0003] Some flow batteries now use graphite bipolar plates to conduct electrons and isolate the electrolyte inside the current collector and electrode. However, the flow grooves of some graphite bipolar plates are too simple, which makes the flowing electrolyte less stable and reduces the performance of the electrolyte. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a composite graphite bipolar plate for a liquid flow battery.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A composite graphite bipolar plate for a liquid flow battery, comprising a graphite bipolar plate body, wherein the graphite bipolar plate body is composed of a cathode plate, an anode plate, and a liquid guide plate, wherein the cathode plate and the anode plate are symmetrically arranged on both sides of the liquid guide plate;

[0007] A first flow channel is provided on one surface of the anode plate, and a second flow channel and a third flow channel are provided on both sides of the first flow channel respectively. A second groove is provided on one surface of the anode plate at one end of the first flow channel, the second flow channel and the third flow channel, and a second opening is provided through the other end of the first flow channel, the second flow channel and the third flow channel away from the second groove.

[0008] In addition, a preferred structure is that the second groove is communicated with the first flow channel, the second flow channel, and the third flow channel, and the second opening is communicated with the first flow channel, the second flow channel, and the third flow channel.

[0009] In addition, a preferred structure is that the anode plate is symmetrically provided with second positioning holes on both sides of the first flow channel, the second flow channel, and the third flow channel.

[0010] In addition, the preferred structure is that a plurality of guide grooves are symmetrically provided on both sides of the surface of the liquid guide plate body, and the liquid guide plate body is symmetrically provided with first positioning holes on both sides of the guide grooves, and the first positioning hole and the second positioning hole have the same aperture and are aligned in center.

[0011] In addition, the preferred structure is that the first grooves are symmetrically opened on the two side surfaces of the liquid guide plate body at one end of the guide groove, and the first opening is opened through the other end of the guide groove on both sides away from the first groove.

[0012] In addition, it is preferred that the cathode plate has the same structure as the anode plate.

[0013] In addition, the preferred structure is that the first flow channel, the second flow channel, and the third flow channel of the anode plate are at the same position as the guide groove, and there is a gap between the protrusion on the back of the anode plate and the guide groove.

[0014] The beneficial effects of the present invention are as follows: by designing the composite graphite bipolar plate for liquid flow batteries into a graphite bipolar plate main body composed of a cathode plate, an anode plate, and a liquid guide plate, when the electrolyte flows through, the provided first flow channel, the second flow channel, and the third flow channel can effectively increase the flow of the electrolyte, and the flow is extended by the gaps generated when the liquid guide plate in the middle and the cathode plate and anode plates on both sides are superimposed, so that the graphite bipolar plate main body can be more stable when the electrolyte circulates. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of the graphite bipolar plate body;

[0016] Figure 2 Schematic diagram of the structure of the graphite bipolar plate after disassembly;

[0017] Figure 3 It is a structural diagram of the front side of the anode plate;

[0018] Figure 4 It is a structural diagram of the back side of the anode plate;

[0019] Figure 5 Schematic diagram of the structure of the liquid guide plate;

[0020] Figure 6 This is a partially enlarged structural diagram when the anode plate and the cathode plate are attached to both sides of the liquid guide plate.

[0021] In the figure: 001 graphite bipolar plate body, 1 liquid guide plate, 11 first opening, 12 guide groove, 13 first positioning hole, 14 first groove, 2 cathode plate, 3 anode plate, 31 second groove, 32 second positioning hole, 33 first flow channel, 34 second flow channel, 35 third flow channel, 36 second opening. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Reference Figure 1-6 A composite graphite bipolar plate for a liquid flow battery includes a graphite bipolar plate body 001. The graphite bipolar plate body 001 is composed of a cathode plate 2, an anode plate 3, and a liquid guide plate 1. The cathode plate 2 and the anode plate 3 are symmetrically arranged on the two side surfaces of the liquid guide plate 1. The liquid guide plate 1 can increase the flow of the electrolyte.

[0024] Among them, a first flow channel 33 is opened on the surface of one side of the anode plate 3, and a second flow channel 34 and a third flow channel 35 are opened on both sides of the first flow channel 33 respectively. A second groove 31 is opened on the surface of one side of the anode plate 3 at the end of one side of the first flow channel 33, the second flow channel 34, and the third flow channel 35, and a second opening 36 is opened through the end of the other side of the first flow channel 33, the second flow channel 34, and the third flow channel 35 away from the second groove 31. The second groove 31 is connected to the first flow channel 33, the second flow channel 34, and the third flow channel 35, and the second opening 36 is connected to the first flow channel 33, the second flow channel 34, and the third flow channel 35. The second opening 36 facilitates the flow of liquid into the gap between the first flow channel 33, the second flow channel 34, the third flow channel 35 and the guide groove 12.

[0025] In addition, the anode plate 3 is symmetrically provided with second positioning holes 32 on both sides of the first flow channel 33, the second flow channel 34, and the third flow channel 35, and a plurality of guide grooves 12 are symmetrically provided on the surfaces of both sides of the liquid guide plate 1. The liquid guide plate 1 is symmetrically provided with first positioning holes 13 on both sides of the guide groove 12. The first positioning hole 13 and the second positioning hole 32 have the same aperture and are aligned in center. The first positioning hole 13 and the second positioning hole 32 facilitate more accurate positioning and fitting of the anode plate 3 and the liquid guide plate 1 together.

[0026] Moreover, first grooves 14 are symmetrically provided on the surfaces of both sides of the liquid guide plate 1 at one end of the guide groove 12, and first openings 11 are provided through the other end of the guide grooves 12 on both sides away from the first groove 14. The first openings 11 facilitate communication between the gaps between the guide grooves 12 on both sides and the first flow channel 33, the second flow channel 34, and the third flow channel 35.

[0027] At the same time, the cathode plate 2 has the same structure as the anode plate 3 , and the surface of the cathode plate 2 with the flow channel is arranged to face outward, while the shell of the flow channel protrusion faces inward toward the liquid guide plate 1 side.

[0028] Moreover, the first flow channel 33 , the second flow channel 34 , and the third flow channel 35 of the anode plate 3 are located at the same position as the guide groove 12 , and there is a gap between the protrusions on the back of the anode plate 3 and the guide groove 12 .

[0029] In this embodiment, after the graphite bipolar plate main body 001 is installed in the liquid flow battery, the electrolyte flows from the second groove 31 to the first flow channel 33, the second flow channel 34, and the third flow channel 35 on one side. At this time, the electrolyte is dispersed into each flow channel and flows, and then flows to the second opening 36, and flows into the gap formed between the guide groove 12 and the raised shell on the back of the first flow channel 33, the second flow channel 34, and the third flow channel 35 through the second opening 36, and then flows along the curved guide groove 12 to the first opening 11, and flows from the first opening 11 to the liquid guide plate 1 on one side surface of the cathode plate 2, and then flows out from the cathode plate 2 in the same process as the anode plate 3, so that the electrolyte flows longer when it flows through the graphite bipolar plate main body 001.

[0030] In the present invention, the composite graphite bipolar plate for the flow battery is designed into a graphite bipolar plate body 001 composed of a cathode plate 2, an anode plate 3, and a liquid guide plate 1. When the electrolyte flows through, the first flow channel 33, the second flow channel 34, and the third flow channel 35 are provided to effectively increase the flow of the electrolyte, and the flow is extended by the gap generated when the liquid guide plate 1 in the middle and the cathode plate 2 and the anode plate 3 on both sides are superimposed. In this way, the graphite bipolar plate body 001 can be more stable when the electrolyte circulates.

[0031] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A composite graphite bipolar plate for a flow battery, comprising a graphite bipolar plate body (001), characterized in that: The graphite bipolar plate body (001) is composed of a cathode plate (2), an anode plate (3), and a liquid guide plate (1), wherein the cathode plate (2) and the anode plate (3) are symmetrically arranged on both side surfaces of the liquid guide plate (1); A first flow channel (33) is provided on one side surface of the anode plate (3), and a second flow channel (34) and a third flow channel (35) are provided on both sides of the first flow channel (33). A second groove (31) is provided on one side surface of the anode plate (3) at one end of the first flow channel (33), the second flow channel (34), and the third flow channel (35), and a second opening (36) is provided through the other end of the first flow channel (33), the second flow channel (34), and the third flow channel (35) away from the second groove (31).

2. The composite graphite bipolar plate for a flow battery according to claim 1, characterized in that: The second groove (31) is in communication with the first flow channel (33), the second flow channel (34), and the third flow channel (35); the second opening (36) is in communication with the first flow channel (33), the second flow channel (34), and the third flow channel (35).

3. The composite graphite bipolar plate for a flow battery according to claim 2, characterized in that: The anode plate (3) is symmetrically provided with second positioning holes (32) on both sides of the first flow channel (33), the second flow channel (34), and the third flow channel (35).

4. The composite graphite bipolar plate for a flow battery according to claim 1, characterized in that: The liquid guide plate (1) has a plurality of guide grooves (12) symmetrically formed on both sides of the plate body. The liquid guide plate (1) has a first positioning hole (13) symmetrically formed on both sides of the guide groove (12). The first positioning hole (13) and the second positioning hole (32) have the same aperture and are aligned in center.

5. The composite graphite bipolar plate for a flow battery according to claim 4, characterized in that: The liquid guide plate (1) has first grooves (14) symmetrically formed on both sides of the plate body at one end of the guide groove (12), and a first opening (11) extending through the plate body of the liquid guide plate (1) at the other end of the guide groove (12) on both sides away from the first groove (14).

6. The composite graphite bipolar plate for a flow battery according to claim 1, characterized in that: The cathode plate (2) and the anode plate (3) have the same structure.

7. The composite graphite bipolar plate for a flow battery according to claim 3, characterized in that: The first flow channel (33), the second flow channel (34), and the third flow channel (35) of the anode plate (3) are located at the same position as the guide groove (12), and a gap is formed between the protrusion on the back side of the anode plate (3) and the guide groove (12).

Images