Integrated flow channel plate and battery stack of liquid flow battery

Abstract

The present invention discloses an integrated flow channel plate and a battery stack of a liquid flow battery. The integrated flow channel plate comprises a flow channel main body plate and a flow channel sealing plate. A plurality of flow channel grooves are evenly distributed on the flow channel main body plate. When the flow channel sealing plate is overlapped with the flow channel main body plate, the flow channel grooves of the flow channel main body plate and the strip-shaped protrusions of the flow channel sealing plate cooperate to form an integrated flow channel plate. Flow channels equal in number to the electrodes of the liquid flow battery are evenly arranged on the integrated flow channel plate. The flow channels on the integrated flow channel plate are separated from each other, and a flow channel opening is provided at each flow channel at the bottom of the flow channel plate. A positive electrode electrolyte shared channel and a negative electrode electrolyte shared channel are provided on the upper part of the flow channel plate. All positive electrode flow channels are connected to the positive electrode shared channel, and all negative electrode flow channels are connected to the negative electrode shared channel. The integrated flow channel plate has a simple structure, a high reliability of the sealing method, and is simple and convenient to operate, thereby reducing the risk of flow channel leakage, and at the same time reducing the battery stack installation process and reducing the cost.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to an integrated flow channel plate and a battery stack of a liquid flow battery. Background Art

[0002] Liquid flow battery is an emerging energy storage battery with good safety and long service life, making it an ideal battery for long-term energy storage applications. In liquid flow batteries, the battery stack is its core component, and its performance is directly related to the performance and cost of the entire system.

[0003] In the prior art, a flow channel is usually set on the electrode frame, and a complete electrolyte flow channel is formed by stacking two electrode frames. The electrode frames are connected by sealing materials or welding. This stacking method can only stack one piece at a time, and there is also a complex sealing structure and a risk of leakage, which affects the installation efficiency and increases the cost of the battery stack to a certain extent. Summary of the invention

[0004] In view of this, the purpose of the present invention is to: in view of the shortcomings of the existing liquid flow battery flow channel technology, disclose an integrated flow channel plate and a battery stack of a liquid flow battery, the integrated flow channel plate includes a flow channel main body plate and a flow channel sealing plate, and a plurality of flow channel grooves are evenly distributed on the flow channel main body plate. When the flow channel sealing plate is overlapped with the flow channel main body plate, the flow channel grooves of the flow channel main body plate and the strip-shaped protrusions of the flow channel sealing plate cooperate to form an integrated flow channel plate, and the integrated flow channel plate is evenly arranged with flow channels equal to the number of liquid flow battery electrodes. The flow channels on the integrated flow channel plate are separated from each other, and a flow channel opening is provided at each flow channel at the bottom of the flow channel plate. A positive electrode electrolyte shared channel and a negative electrode electrolyte shared channel are provided on the upper part of the flow channel plate, all positive electrode flow channels are connected to the positive electrode shared channel, and all negative electrode flow channels are connected to the negative electrode shared channel; the integrated flow channel plate has a simple structure, a high reliability of the sealing method, simple and convenient operation, and reduces the risk of flow channel leakage, while reducing the battery stack installation process and reducing the cost.

[0005] In order to achieve the above technical effects, the following technical solutions are adopted:

[0006] An integrated flow channel plate of a liquid flow battery, consisting of a flow channel main body plate and a flow channel sealing plate; wherein the flow channel main body plate is provided with a positive electrode electrolyte shared channel and a negative electrode electrolyte shared channel, and flow channel grooves 1 are evenly arranged on the flow channel main body plate, and the flow channel grooves 1 are alternately connected with the positive electrode electrolyte shared channel and the negative electrode electrolyte shared channel, respectively, for circulating electrolytes of different polarities; on the matching flow channel sealing plate, protrusions 1 matching with the flow channel grooves 1 are evenly distributed, and flow channel openings are distributed at both ends of the flow channel sealing plate, and through-type positive electrode electrolyte flow channel openings and through-type electrolyte flow channel openings are alternately distributed. a negative electrode electrolyte flow channel outlet; after the flow channel sealing plate and the flow channel main body plate are installed, a positive electrode electrolyte flow channel and a negative electrode electrolyte flow channel are formed between the flow channel groove one and the protrusion one, the upper end of the positive electrode electrolyte flow channel is connected to the positive electrode electrolyte shared channel, and the lower end is connected to the positive electrode electrolyte flow channel outlet, the upper end of the negative electrode electrolyte flow channel is connected to the negative electrode electrolyte shared channel, and the lower end is connected to the negative electrode electrolyte flow channel outlet, the shared channel and the flow channel outlet are located at both ends of the flow channel; the positive and negative electrode electrolyte flow channels are alternately distributed front and back, and are alternately connected to the shared channel and the flow channel outlet to form an electrolyte communication channel.

[0007] Further, the integrated flow channel plate also includes a flow channel main body plate modification, the flow channel main body plate modification is evenly provided with protrusions 2 corresponding to the flow channel groove 1 of the flow channel main body plate on its upper part, and liquid flow inlets are also alternately distributed on both sides; flow channel grooves 2 are evenly arranged at the lower part, and the upper part of the flow channel grooves 2 is alternately connected to the liquid flow inlet; after the flow channel main body plate modification is installed with the flow channel main body plate, a positive electrode electrolyte flow channel and a negative electrode electrolyte flow channel are formed between the flow channel groove 1 and the protrusions 2, and after the lower part of the flow channel main body plate modification is installed with the flow channel sealing plate, a lower positive electrode electrolyte flow channel and a lower negative electrode electrolyte flow channel are formed between the flow channel groove 2 and the protrusions 1;

[0008] The upper end of the positive / negative electrolyte flow channel is connected to the positive / negative electrolyte shared channel, the lower part is connected to the lower positive / negative electrolyte flow channel through the liquid flow inlet, and the lower end of the lower positive / negative electrolyte flow channel is connected to the positive / negative electrolyte flow channel outlet, forming a " "-shaped flow channel.

[0009] Furthermore, the shape of the electrolyte sharing channel is any shape, including circular, elliptical, and square.

[0010] Furthermore, after the flow channel main body plate and the flow channel sealing plate are installed in coordination, the sealing of each flow channel is achieved through sealing materials or welding, so that the flow channels are isolated from each other and electrolytes in different flow channels will not cross-liquid.

[0011] Furthermore, after the flow channel main body plate is modified and installed, the sealing of each flow channel is achieved through sealing materials or welding, so that the flow channels are isolated from each other and the electrolytes in different flow channels will not cross-flow.

[0012] Furthermore, the sealing material is one or more of corrosion-resistant rubber and elastomeric resin.

[0013] Furthermore, the material of the flow channel main body plate and the flow channel sealing plate is a non-metallic material with insulating properties.

[0014] Furthermore, the modified material of the flow channel main body plate is a non-metallic material with insulating properties.

[0015] Furthermore, the flow channel main body plate and the flow channel sealing plate include one of polypropylene, polyethylene, polyvinyl chloride, ABS, CPVC, EPDM rubber or one or more of their modified polymer materials.

[0016] A liquid flow battery stack, the stack consisting of a flow channel plate and a pole core group, characterized in that the liquid flow battery includes any one of the integrated flow channel plates described above.

[0017] The beneficial effects of the present invention are:

[0018] The present invention provides an integrated flow channel plate structure, which has a simple structure and no complicated flow channel sealing design, greatly reduces the use of sealing rings and reduces the risk of leakage of the fuel cell stack. At the same time, the integrated flow channel plate design reduces the installation process, improves installation efficiency and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. The drawings in the following description are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0020] Figure 1 This is an exploded schematic diagram of the integrated flow channel plate of Example 1 of the present invention;

[0021] Figure 2 This is a schematic diagram of the integrated flow channel plate in Example 1 of the present invention being exploded after being turned upside down;

[0022] Figure 3 This is a schematic diagram of the flow channel structure of the integrated flow channel plate according to Example 1 of the present invention;

[0023] Figure 4 This is a schematic diagram of another flow channel structure of the integrated flow channel plate according to Example 1 of the present invention;

[0024] Figure 5 This is an exploded schematic diagram of the integrated flow channel plate of Example 2 of the present invention;

[0025] Figure 6This is a schematic diagram of the integrated flow channel plate of Example 2 of the present invention being exploded after being turned upside down;

[0026] Figure 7 This is a schematic diagram of the flow channel structure of the integrated flow channel plate according to Embodiment 2 of the present invention;

[0027] Figure 8 This is a schematic diagram of another flow channel structure of the integrated flow channel plate according to Example 2 of the present invention;

[0028] Among them, 1 is the flow channel main body plate, 11 is the positive electrolyte shared channel, 12 is the negative electrolyte shared channel, 13 is the flow channel groove one, 111 is the positive electrolyte flow channel, 112 is the negative electrolyte flow channel, 2 is the flow channel sealing plate, 21 is the protrusion one, 22 is the negative electrolyte flow channel opening, 23 is the positive electrolyte flow channel opening, 3 is the flow channel main body plate modification, 31 is the liquid flow inlet, 32 is the protrusion two; 33 is the flow channel groove two; 311 is the lower positive electrolyte flow channel; 312 is the lower negative electrolyte flow channel. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations and / or combinations thereof.

[0032] Embodiment 1:

[0033] The up, down, front, back, left, and right described in the following text are defined according to the orientation of the embodiment diagram.

[0034] See also Figure 1 The present invention provides an integrated flow channel plate, such as Figure 1 As shown, it is composed of a flow channel main body plate 1 and a flow channel sealing plate 2. The number of the flow channel main body plate and the flow channel sealing plate is not limited to 1, and can be increased or decreased according to actual conditions, and the structural form can be deformed.

[0035] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The integrated flow channel plate is composed of a flow channel main body plate 1 and a flow channel sealing plate 2. The flow channel main body plate is provided with a positive electrolyte shared channel 11 and a negative electrolyte shared channel 12, and the shape of the shared channel can be different shapes such as round, oval, square, etc. The flow channel main body plate is evenly arranged with flow channel grooves 13, and the flow channel grooves 13 are alternately connected with the shared channels 11 and 12, and are used to circulate electrolytes of different polarities. On the matching flow channel sealing plate 2, there are evenly distributed protrusions 21 that match the flow channel grooves 13, and the flow channel openings are distributed at both ends of the sealing plate, and there are alternately distributed through-type positive electrolyte flow channel openings 22 and through-type negative electrolyte flow channel openings 23. After the channel sealing plate and the channel main body plate are installed, a positive electrolyte channel 111 and a negative electrolyte channel 112 are formed between the channel groove 13 and the protrusion 21. The upper end of the positive electrolyte channel 111 is connected to the positive electrolyte shared channel 11, and the lower end is connected to the positive electrolyte channel opening 23. The upper end of the negative electrolyte channel 112 is connected to the negative electrolyte shared channel 12, and the lower end is connected to the negative electrolyte channel opening 22. The shared channel and the channel opening are located at both ends of the channel. The positive and negative electrolyte channels are alternately distributed front and back, and are alternately connected to the shared channel and the channel opening to form an electrolyte communication channel.

[0036] Embodiment 2:

[0037] See also Figure 5 , Figure 6 , Figure 7 and Figure 8 The integrated flow channel plate is composed of a flow channel main body plate 1, a flow channel main body plate modification 3, and a flow channel sealing plate 2. The flow channel main body plate 1 and the flow channel sealing plate 2 have the same structural forms as those in Example 1. The flow channel main body plate modification 3 is evenly provided with a protrusion 2 32 structure corresponding to the flow channel groove 1 13 of the flow channel main body plate 1 on its upper part, and liquid flow inlets 31 are also alternately distributed on both sides; flow channel groove structures 33 are evenly arranged at the lower part, and the upper part of the flow channel groove 2 33 is alternately connected to the liquid flow inlet 31; after the flow channel main body plate modification 3 is installed with the flow channel main body plate 1, a positive electrode electrolyte flow channel 111 and a negative electrode electrolyte flow channel 111 are formed between the flow channel groove 1 13 and the protrusion 2 32. 2. After the lower part of the flow channel main body plate modification 3 is installed with the flow channel sealing plate 2, a lower positive electrode electrolyte flow channel 311 and a lower negative electrode electrolyte flow channel 312 are formed between the flow channel groove 2 33 and the protrusion 1 21; the upper end of the negative electrode electrolyte flow channel 112 is connected to the negative electrode electrolyte shared channel 12, and the lower part is connected to the lower negative electrode electrolyte flow channel 312 through the liquid flow inlet 31, and the lower end of the lower negative electrode electrolyte flow channel 312 is connected to the negative electrode electrolyte flow channel opening 22, forming a " "-shaped flow channel; the lower positive electrolyte flow channel 311 is similar in form. In this embodiment, the shared channel and the flow channel opening are located at both ends of the flow channel. The positive and negative electrolyte flow channels are alternately distributed front and back, and are alternately connected with the shared channel and the flow channel opening to form an electrolyte communication channel. In this embodiment, by adding a modified part of the liquid flow main plate, the original flow channel length is increased, and it can be selected according to needs in actual use.

[0038] In summary, the present invention discloses an integrated flow channel plate and a battery stack of a liquid flow battery. The integrated flow channel plate comprises a flow channel main body plate and a flow channel sealing plate. A plurality of flow channel grooves are evenly distributed on the flow channel main body plate. When the flow channel sealing plate is overlapped with the flow channel main body plate, the flow channel grooves of the flow channel main body plate and the strip-shaped protrusions of the flow channel sealing plate cooperate to form an integrated flow channel plate. The integrated flow channel plate is evenly arranged with flow channels having the same number as the number of electrodes of the liquid flow battery. The flow channels on the integrated flow channel plate are separated from each other, and a flow channel opening is provided at each flow channel at the bottom of the flow channel plate. A positive electrode electrolyte shared channel and a negative electrode electrolyte shared channel are provided on the upper part of the flow channel plate. All positive electrode flow channels are connected to the positive electrode shared channel, and all negative electrode flow channels are connected to the negative electrode shared channel. The integrated flow channel plate has a simple structure, a high reliability of the sealing method, simple and convenient operation, reduced the risk of flow channel leakage, and at the same time reduces the battery stack installation process and reduces the cost.

[0039] At this point, those skilled in the art recognize that, although the embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the contents disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. An integrated flow channel plate for a flow battery, It is characterized in that The integrated flow channel plate is composed of a flow channel main body plate (1) and a flow channel sealing plate (2); wherein the flow channel main body plate (1) is provided with a positive electrode electrolyte shared channel (11) and a negative electrode electrolyte shared channel (12); flow channel grooves (13) are evenly arranged on the flow channel main body plate (1); the flow channel grooves (13) are alternately connected to the positive electrode electrolyte shared channel (11) and the negative electrode electrolyte shared channel (12), and are respectively used to circulate electrolytes of different polarities; on the flow channel sealing plate (2) matched therewith, protrusions (21) matched with the flow channel grooves (13) are evenly distributed; the flow channel openings are distributed at both ends of the flow channel sealing plate (2); and through-type positive electrode electrolyte flow channel openings (23) and through-type negative electrode electrolyte flow channel openings (23) are alternately distributed. An electrolyte flow channel opening (22); after the flow channel sealing plate (2) and the flow channel main body plate (1) are installed, a positive electrolyte flow channel (111) and a negative electrolyte flow channel (112) are formed between the flow channel groove 1 (13) and the protrusion 1 (21); the upper end of the positive electrolyte flow channel (111) is connected to the positive electrolyte shared channel (11), and the lower end is connected to the positive electrolyte flow channel opening (23); the upper end of the negative electrolyte flow channel (112) is connected to the negative electrolyte shared channel (12), and the lower end is connected to the negative electrolyte flow channel opening (22); the shared channel and the flow channel opening are located at both ends of the flow channel; the positive and negative electrolyte flow channels are alternately distributed front and back, and are alternately connected to the shared channel and the flow channel opening to form an electrolyte communication channel.

2. An integrated flow channel plate for a liquid flow battery as claimed in claim 1, It is characterized in that The integrated flow channel plate also includes a flow channel main plate modification (3), wherein the flow channel main plate modification (3) is evenly provided with protrusions (32) corresponding to the flow channel main plate flow channel groove (13) at its upper portion, and liquid flow inlets (31) are also alternately distributed on both sides; flow channel grooves (33) are evenly arranged at the lower portion, and the upper portions of the flow channel grooves (33) are alternately connected to the liquid flow inlets (31); after the flow channel main plate modification (3) is installed with the flow channel main plate (1), a positive electrode electrolyte flow channel (111) and a negative electrode electrolyte flow channel (112) are formed between the flow channel groove (13) and the protrusions (32); after the lower portion of the flow channel main plate modification (3) is installed with the flow channel sealing plate (2), a lower positive electrode electrolyte flow channel (311) and a lower negative electrode electrolyte flow channel (312) are formed between the flow channel groove (33) and the protrusions (21); The upper end of the positive / negative electrolyte flow channel is connected to the positive / negative electrolyte shared channel, the lower part is connected to the lower positive / negative electrolyte flow channel through the liquid flow inlet (31), and the lower end of the lower positive / negative electrolyte flow channel is connected to the positive / negative electrolyte flow channel outlet, forming a whole" "-shaped flow channel.

3. The integrated flow channel plate as claimed in claim 1, It is characterized in that The electrolyte sharing channel can be of any shape.

4. The integrated flow channel plate as claimed in claim 1, It is characterized in that The shape of the electrolyte shared channel includes circular, elliptical, and square; after the flow channel main body plate (1) and the flow channel sealing plate (2) are assembled, the sealing of each flow channel is achieved through sealing materials or welding, so that the flow channels are isolated from each other and electrolytes in different flow channels will not cross-flow.

5. The integrated flow channel plate as claimed in claim 2, It is characterized in that After the modified flow channel main plate (3) is installed, the sealing of each flow channel is achieved through sealing materials or welding, so that the flow channels are isolated from each other and electrolytes in different flow channels will not cross-liquid.

6. The integrated flow channel plate as claimed in claim 4, It is characterized in that The sealing material is one or more of corrosion-resistant rubber and elastomeric resin.

7. The integrated flow channel plate as claimed in claim 1, It is characterized in that The material of the flow channel main body plate (1) and the flow channel sealing plate (2) is a non-metallic material with insulating properties.

8. The integrated flow channel plate as claimed in claim 2, It is characterized in that The material of the modified flow channel main body plate (3) is a non-metallic material and has insulating properties.

9. The integrated flow channel plate as claimed in claim 1, It is characterized in that The flow channel main body plate (1) and the flow channel sealing plate (2) comprise one of polypropylene, polyethylene, polyvinyl chloride, ABS, CPVC, EPDM rubber or one or more of their modified polymer materials.

10. A liquid flow battery stack, the stack consisting of a flow channel plate and a pole core group, It is characterized in that The liquid flow battery comprises the integrated flow channel plate according to any one of claims 1 to 9.

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