Bipolar plate and carbon felt integrated combined structure

Abstract

The utility model relates to the technical field of aquatic product cleaning machinery, in particular to a bipolar plate and carbon felt integrated combined structure which is provided with bipolar plates and carbon felt plates, the bipolar plates are located between the two carbon felt plates, groove runners are formed in the outer surfaces of the carbon felt plates, channels are formed in the carbon felt plates, and the two ends of each channel are open. The groove flow channels on the outer surface of the carbon felt plate can increase the contact area between the electrolyte and the carbon felt plate, so that the electrochemical reaction is improved, and the current density and the power density of the system are improved; the channel design in the carbon felt plate can promote the transmission of the electrolyte in the carbon felt plate, so that the electrolyte is easier to diffuse in the carbon felt plate, the uniformity and transmission rate of the electrolyte are improved, the pressure drop of the carbon felt plate is effectively reduced, and the risk of electrolyte leakage and pumping loss are avoided; therefore, the contact area of the electrolyte and the carbon felt plate is increased, reactants are distributed more uniformly, the flow velocity is increased, the mass transfer process is enhanced, and the power density of the system is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aquatic product cleaning machinery, in particular to a bipolar plate carbon felt integrated combination structure. Background Art

[0002] Liquid flow battery is a new type of device for storing and efficiently converting electrical energy, with the characteristics of large storage capacity, long life, high efficiency and non-toxicity. The core power of liquid flow battery is its single cell, which is mainly composed of a membrane and porous electrodes on the positive and negative sides, as well as other auxiliary components, and is the site of electrochemical reactions.

[0003] At high current density, the electrode material of the liquid flow battery will experience ohmic polarization, resulting in a decrease in the voltage efficiency of the battery. To address this problem, an effective design of thin carbon felt electrodes is currently used to reduce the resistance between the electrolyte and the electrode, reduce the ohmic resistance, and increase the operating current density. However, there are two main disadvantages to using thin electrodes: first, the use of thin carbon felt electrodes in large battery stacks may increase the pressure drop, leading to the risk of electrolyte leakage and pumping losses; second, the contact resistivity between the carbon felt and the bipolar plate will also limit the increase in the system current density. These two shortcomings seriously hinder the further development of high power density liquid flow battery stacks. Summary of the invention

[0004] To solve the above problems, the present application provides a bipolar plate-carbon felt integrated combination structure, which is provided with a bipolar plate and a carbon felt plate, wherein the bipolar plate is located between two carbon felt plates, a groove flow channel is provided on the outer surface of the carbon felt plate, and a channel is provided inside the carbon felt plate, wherein the channel is open at both ends.

[0005] In one embodiment, a plurality of through holes are disposed on the inner wall of the channel.

[0006] In one embodiment, the number of the channels is at least two, the channels are arranged in parallel, and the channels are evenly spaced.

[0007] In one embodiment, the groove flow channel has a shape of a triangle, a rectangle, or a semi-arc.

[0008] In one embodiment, the bipolar plate and the carbon felt plate are both rectangular plates, and the length and width of the bipolar plate are smaller than those of the carbon felt plate.

[0009] The beneficial effects of the utility model are:

[0010] The present application discloses a bipolar plate carbon felt integrated combination structure, which is provided with a bipolar plate and a carbon felt plate. The bipolar plate is located between two carbon felt plates to form a close contact structure of a carbon felt plate-bipolar plate-carbon felt plate, which directly and effectively eliminates the contact resistance between the carbon felt plate and the bipolar plate, and improves the working current density. By setting groove flow channels and channels, the conductivity and electrochemical activity of the carbon felt plate are fully utilized, while the contact area between the electrolyte and the carbon felt plate is increased, and the transmission of the electrolyte inside the carbon felt plate is promoted. The groove flow channels on the outer surface of the carbon felt plate can increase the contact area between the electrolyte and the carbon felt plate, which is conducive to improving the electrochemical reaction, thereby improving the current density and power density of the system; it can make the electrolyte flow more evenly on the surface of the carbon felt plate, reduce the generation of local concentration polarization, help improve the uniformity of the electrochemical reaction, and improve the efficiency and energy conversion efficiency of the system. The channel design inside the carbon felt plate can promote the transmission of the electrolyte inside the carbon felt plate, making it easier for the electrolyte to diffuse inside the carbon felt plate, and improving the uniformity and transmission rate of the electrolyte. Therefore, by setting grooved flow channels and channels, the pressure drop of the carbon felt plate can be effectively reduced, and the risk of electrolyte leakage and pumping loss can be avoided; the contact area between the electrolyte and the carbon felt plate is increased, and the distribution of the reactants is more uniform. At the same time, the flow rate is increased, the mass transfer process is enhanced, and the system power density is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a side view of the utility model;

[0012] Figure 2 This is the front view of the utility model;

[0013] Figure 3 It is a schematic diagram of the structure of the utility model;

[0014] Explanation of symbols in the figure:

[0015] 1. Bipolar plate; 2. Carbon felt plate; 3. Grooved flow channel; 4. Channel. DETAILED DESCRIPTION

[0016] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0017] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0018] like Figure 1 , 2 As shown in , 3, a bipolar plate carbon felt integrated combination structure is provided with a bipolar plate 1 and a carbon felt plate 2, wherein the bipolar plate 1 is located between two carbon felt plates 2, a groove flow channel 3 is provided on the outer surface of the carbon felt plate 2, a channel 4 is provided inside the carbon felt plate 2, and the channel 4 is opened at both ends.

[0019] Specifically, the bipolar plate 1 is located between two carbon felt plates 2, forming a close contact structure of carbon felt plate 2-bipolar plate 1-carbon felt plate 2, directly and effectively eliminating the contact resistance between the carbon felt plate and the bipolar plate 1, and improving the working current density. The outer surface of the carbon felt plate 2 is provided with a groove flow channel 3 for contacting with the electrolyte, and the carbon felt plate 2 is provided with a channel 4, and the two ends of the channel 4 are opened to increase the transmission path of the electrolyte inside the carbon felt plate 2. By providing the groove flow channel 3 and the channel 4, the conductivity and electrochemical activity of the carbon felt plate 2 are fully utilized, while the contact area between the electrolyte and the carbon felt plate 2 is increased, and the transmission of the electrolyte inside the carbon felt plate 2 is promoted. The groove flow channel 3 on the outer surface of the carbon felt plate 2 can increase the contact area between the electrolyte and the carbon felt plate 2, which is conducive to improving the electrochemical reaction, thereby improving the current density and power density of the system; it can make the electrolyte flow more evenly on the surface of the carbon felt plate 2, reduce the generation of local concentration polarization, help to improve the uniformity of the electrochemical reaction, and improve the efficiency and energy conversion efficiency of the system. The design of the channel 4 inside the carbon felt plate 2 can promote the transmission of the electrolyte inside the carbon felt plate 2, making it easier for the electrolyte to diffuse inside the carbon felt plate 2, thereby improving the uniformity and transmission rate of the electrolyte. Therefore, by providing the groove flow channel 3 and the channel 4, the pressure drop of the carbon felt plate 2 is effectively reduced, and the risk of electrolyte leakage and pumping loss are avoided; the contact area between the electrolyte and the carbon felt plate 2 is increased, the distribution of the reactants is more uniform, and the flow rate is increased, the mass transfer process is enhanced, and the system power density is greatly improved.

[0020] like Figure 1 , 3 As shown, a plurality of through holes are arranged on the inner wall of the channel 4 .

[0021] Specifically, the design of providing a plurality of through holes on the inner wall of the channel 4 is to increase the contact area between the inner wall of the channel 4 and the electrolyte, promote uniform transmission of the electrolyte in the channel, and improve the stability and reliability of the system.

[0022] like Figure 1 , 3 As shown, the number of the channels 4 is at least two, the channels are arranged in parallel, and the channels 4 are evenly spaced.

[0023] Specifically, the channels 4 arranged in parallel and evenly spaced apart can ensure that the electrolyte is evenly distributed throughout the carbon felt plate 2 , increase the diffusion path of the electrolyte within the carbon felt plate 2 , and improve the diffusion rate of the electrolyte, thereby promoting rapid transmission of the electrolyte within the carbon felt plate 2 .

[0024] like Figure 1 , 2 As shown, the groove flow channel 3 has a shape of a triangle, a rectangle, or a semi-arc.

[0025] Specifically, designing the groove flow channel 3 into a triangular, rectangular or semi-arc shape is beneficial to increasing the flow rate of the electrolyte, increasing the contact area between the electrolyte and the carbon felt plate 2, promoting gas release, and reducing concentration polarization, thereby improving the stability and efficiency of the system. In this embodiment, the groove flow channel 3 is rectangular.

[0026] like Figure 1 , 2 As shown, the bipolar plate 1 and the carbon felt plate 2 are both rectangular plates, and the length and width of the bipolar plate 1 are smaller than those of the carbon felt plate 2 .

[0027] Compared with the prior art, the beneficial effects of this application are:

[0028] The present application discloses a bipolar plate carbon felt integrated structure, which is provided with a bipolar plate 1 and a carbon felt plate 2, wherein the bipolar plate 1 is located between two carbon felt plates 2, forming a close contact structure of carbon felt plate 2-bipolar plate 1-carbon felt plate 2, directly and effectively eliminating the contact resistance between the carbon felt plate and the bipolar plate 1, and improving the working current density. The outer surface of the carbon felt plate 2 is provided with a groove flow channel 3, and the carbon felt plate 2 is provided with a channel 4, and the channel 4 is provided with openings at both ends. By providing the groove flow channel 3 and the channel 4, the conductivity and electrochemical activity of the carbon felt plate 2 are fully utilized, and the contact area between the electrolyte and the carbon felt plate 2 is increased, and the transmission of the electrolyte inside the carbon felt plate 2 is promoted, so as to effectively reduce the pressure drop of the carbon felt plate 2, avoid the risk of electrolyte leakage and pumping loss; so that the contact area between the electrolyte and the carbon felt plate 2 is increased, the distribution of the reactants is more uniform, and the flow rate is increased, the mass transfer process is enhanced, and the system power density is greatly improved.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A bipolar plate carbon felt integrated structure, comprising a bipolar plate (1) and a carbon felt plate (2), wherein the bipolar plate (1) is located between two carbon felt plates (2), and the outer surface of the carbon felt plate (2) is provided with a groove flow channel (3), characterized in that: A channel (4) is provided inside the carbon felt plate (2), and the channel (4) is open at both ends.

2. The bipolar plate carbon felt integrated structure according to claim 1, characterized in that: A plurality of through holes are arranged on the inner wall of the channel (4).

3. The bipolar plate carbon felt integrated structure according to claim 1, characterized in that: The number of the channels (4) is at least two, the channels (4) are arranged in parallel, and the channels (4) are evenly spaced.

4. The bipolar plate carbon felt integrated structure according to claim 1, characterized in that: The groove flow channel (3) has a shape of one of a triangle, a rectangle, and a semi-arc.

5. The bipolar plate carbon felt integrated structure according to claim 1, characterized in that: The bipolar plate (1) and the carbon felt plate (2) are both in the shape of rectangular plates, and the length and width of the bipolar plate (1) are smaller than the length and width of the carbon felt plate (2).

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