Flow battery end plate and design method

Abstract

The invention discloses a flow battery end plate and a design method, and belongs to the technical field of flow batteries, the flow battery end plate comprises first members, the extension length of a first bottom plate part in a first direction is equal to the length of the end plate, the adjacent first members are arranged at intervals in a second direction, and the first members are arranged at intervals in the second direction. A connecting interval is formed between every two adjacent first components; the adjacent second components are arranged at intervals in the connecting interval in the first direction, so that a gap interval is formed between the adjacent second components, and the two ends, in the second direction, of each second component are welded to the two first components correspondingly. According to the end plate, the first component composed of the first side wall part and the first bottom plate part and the second component composed of the second bottom plate part and the second side wall part are designed, and the first component and the second component are assembled in a welding mode to form the end plate, so that the machining difficulty of the end plate is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of flow batteries, and particularly relates to a flow battery end plate and a design method thereof. Background Art

[0002] With the development of the economic society and the improvement of the living standards of human beings, the traditional energy supply structure dominated by fossil energy can no longer meet the sustainable development of human beings. Renewable energy such as wind power and photovoltaic is gradually changing from auxiliary energy to dominant energy. With the increase in the installed capacity of renewable energy, the demand for large-scale energy storage systems will be increasing. Energy storage technologies include physical energy storage, electrochemical energy storage, and electromagnetic energy storage. Large-scale electrochemical energy storage technology can effectively improve the safety and operation efficiency of the power grid, and is of extremely important significance for the country to implement the major strategy of energy structure adjustment; flow battery is an important electrochemical energy storage method, with the characteristics of high safety, high cycle life, and scalability, and is a very promising large-scale energy storage technology.

[0003] The end plate is an important component of the flow battery, which is the direct object of the pressing force of the battery stack and can transmit the pressing force to the components inside the battery stack; the strength of the end plate affects its structural deformation and internal stress, and the warping degree of the end plate under force affects the uniform force of the battery stack plate frame and thus affects the sealing performance of the stack; currently, the common end plate structures in the market are relatively thick and heavy, and there is still room for optimization in the structure. Moreover, the overall end plate is processed from a single steel plate or a steel plate plus section steel, and the processing amount is large and complex. Summary of the Invention

[0004] The purpose of the present invention is to provide a flow battery end plate to solve the problems in the structural design of the existing end plates proposed in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A flow battery end plate, the end plate includes a plurality of:

[0006] A first member, having a first bottom plate portion and a first side wall portion, the first side wall portion is formed by extending along a third direction from the edge line of the first bottom plate portion, and has two relatively arranged parts in a second direction, and the extension length of the first bottom plate portion in a first direction is equal to the length of the end plate. Adjacent first members are spaced in the second direction to form a connection interval between two adjacent first members;

[0007] A second member, having a second bottom plate portion and a second side wall portion, the second side wall portion is formed by extending along a third direction from the edge line of the second bottom plate portion, and has two relatively arranged parts in a first direction. Adjacent second members are spaced in the first direction within the connection interval to form a gap interval between two adjacent second members, and both ends of the second member in the second direction are welded to two first members respectively.

[0008] Preferably, the contact positions of the first bottom plate portion and the second bottom plate portion, and the contact positions of the first side wall portion and the second side wall portion are configured as welding positions.

[0009] Preferably, the ratio of the extension length of the gap interval in the first direction to the extension length of the second component in the first direction is not greater than 1 / 2.

[0010] Preferably, the first component and the second component are channel steels of different specifications.

[0011] Preferably, liquid inlet and outlet pipes for the battery stack are provided at both ends of the first plate portion in the first direction, and flange short pipes are welded at the positions of the liquid inlet holes.

[0012] Preferably, auxiliary hole groups are provided on the first bottom plate portion, and the auxiliary hole groups include a plurality of auxiliary hole units spaced in the first direction.

[0013] Preferably, the auxiliary hole group includes a first hole group located in the middle of the first bottom plate portion in the first direction and second hole groups located on both sides of the first hole group, and the distance between adjacent auxiliary hole units in the first hole group is smaller than the distance between adjacent auxiliary hole units in the second hole group.

[0014] Preferably, a reinforcing rib structure is provided between the first bottom plate portion and the first side wall portion.

[0015] On the other hand, the present application discloses a design method for an end plate of a flow battery, and the method includes:

[0016] Select a first component, the first component has a first bottom plate portion and a first side wall portion, the first side wall portion is formed by extending along a third direction from the edge line of the first bottom plate portion, and has two relatively arranged parts in the second direction, and the extension length of the first bottom plate portion in the first direction is equal to the length of the end plate;

[0017] Select a second component, the second component has a second bottom plate portion and a second side wall portion, the second side wall portion is formed by extending along a third direction from the edge line of the second bottom plate portion, and has two relatively arranged parts in the first direction;

[0018] Assemble a plurality of first components and second components by welding to form an end plate.

[0019] Preferably, the first component and the second component are channel steels of different specifications.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] In this application, a first component composed of a first side wall portion and a first bottom plate portion, and a second component composed of a second bottom plate portion and a second side wall portion are designed. The first component and the second component are assembled by welding to form an end plate, thereby reducing the processing difficulty of the end plate. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the overall assembly of the end plate;

[0023] Figure 2 It is a schematic diagram of the structure of the first component;

[0024] Figure 3 It is a schematic diagram of the structure of the second component;

[0025] Figure 4 It is a schematic diagram of the end face of the end plate.

[0026] In the figure:

[0027] 10. End plate;

[0028] 100. First component; 101. First bottom plate portion; 102. First side wall portion;

[0029] 200. Second component; 201. Second bottom plate portion; 202. Second side wall portion

[0030] 300. Connection interval; 301. Gap interval;

[0031] 400. Long strip hole; 401. Auxiliary hole group; 401a. First part; 401b. Second part; 402. Reinforcing rib structure. Detailed Implementation Modes

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] A flow battery end plate 10 (hereinafter referred to as the end plate 10) is configured as the object of the pressing force of the battery stack and can transmit the above-mentioned pressing force to the components inside the battery stack. That is, the end plate 10 constitutes a force-bearing and transmitting component of the flow battery. Specifically, the end plate 10 has a bottom surface in the height direction (thickness direction), and this bottom surface is configured as the assembly plane of the heat preservation plate, and based on this heat preservation plate, the pressing force acting on the end plate 10 is transmitted to the components inside the stack.

[0034] In some examples, refer to Figure 1, the main body of the above-mentioned end plate 10 is formed by splicing a first member 100 and a second member 200. The main structures of the first member 100 and the second member 200 are the same (both are composed of a subsequent bottom plate portion and a side wall portion), and they have different specifications, that is, the first member 100 and the second member 200 have different dimensional parameters (such as parameters like length, width, and height). At the same time, different first members 100 (second members 200) that make up the end plate 10 are connected by welding to form the above-mentioned end plate 10.

[0035] In some examples, referring to Figures 1-3 , both the above-mentioned first member 100 and second member 200 have a bottom plate portion and a side wall portion. The bottom plate portions of the first member 100 and the second member 200 are both approximately configured as a rectangular plate body. The side wall portion is formed by unidirectional extension of two opposite edge lines of the bottom plate portion in a direction perpendicular to the bottom plate portion (i.e., the height direction of the end plate 10). That is, the side wall portion includes two relatively arranged parts. Exemplarily, referring to Figure 2 , the above-mentioned first member 100 has opposite first and second edges in the width direction (hereinafter referred to as the second direction) of the end plate 10. Two rectangular plate bodies formed by the unidirectional extension of the first edge and the second edge in the height direction (hereinafter referred to as the third direction) of the end plate 10 respectively constitute the two parts of the side wall portion of the first member 100. That is, the two parts of the side wall portion in the first member 100 are relatively arranged in the second direction. Correspondingly, the two parts of the side wall portion in the second member 200 are respectively formed by the unidirectional extension of two opposite edge lines of its bottom plate portion in the third direction in the length direction (hereinafter referred to as the first direction) of the end plate 10. That is, the two parts of the side wall portion in the second member 200 are relatively arranged in the first direction.

[0036] Continue to refer to Figures 1-3, The composition of the end plate 10 will be further described in combination with this figure. In some examples, the length of the above-mentioned first member 100 in the first direction is adapted to the length of the end plate 10, so that the end face of the first member 100 covers the bottom surface of the end plate 10 in the first direction and forms a part of the bottom surface of the end plate 10 in the second direction. At the same time, a plurality of first members 100 are spaced apart in the second direction, and a connection interval 300 is formed between the side wall portions of adjacent first members 100. The length of the connection interval 300 in the second direction is adapted to the width of the second member 200. A plurality of second members 200 are spaced apart in the first direction within the connection interval 300 and are connected to the first members 100 on both sides (in the second direction) by welding. That is, a plurality of first members 100 are connected by the second members 200 in the second direction, and the end faces of the plurality of first members 100 and the second members 200 jointly cover the bottom surface of the end plate 10 in the second direction. In some examples, the above-mentioned first member 100 and the second member 200 are welded at the contact positions of the first bottom plate portion 101 and the second bottom plate portion, and the contact positions of the first side wall portion 102 and the second side wall portion 202. That is, the contact positions of the first bottom plate portion 101 and the second bottom plate portion 201, and the contact positions of the first side wall portion 102 and the second side wall portion 202 constitute the welding positions of the first member 100 and the second member 200. At the same time, adjacent second members 200 are spaced apart in the first direction to form a gap interval 301 between the second side wall portions 202 of adjacent two second members 200. In some examples, refer to Figure 4 , the length D of the above-mentioned gap interval 301 in the first direction is not greater than 1 / 2 of the length of the second member 200 in the first direction (that is, the distance between the second side walls in the second member 200) W, that is, D / W ≤ 1 / 2.

[0037] Refer to Figure 1 , In the figure, an end plate 10 formed by splicing two first members 100 and four second members 200 is exemplarily shown, and the two first members 100 are distinguished by letters A1 and A2, and the four second members 200 are distinguished by B1, B2, B3, and B4. At the same time, in order to distinguish the bottom plate portions and side wall portions of the first member 100 and the second member 200, the plate body portion and the side wall portion of the first member 100 are respectively denoted as the first bottom plate portion 101 and the first side wall portion 102, and the plate body portion and the side wall portion of the second member 200 are respectively denoted as the second bottom plate portion 201 and the second side wall portion 202. Specifically, the above-mentioned first members 100A1 and A2 are spaced apart in the second direction, a plurality of second members 200 are arranged within the connection interval 300, adjacent first members 100 are connected by the second members 200 within the connection interval 300, and the outer end faces of the first bottom plate portion 101 of the first member 100 and the second plate body portion 201 of the second member 200 are coplanar to form the bottom surface of the end plate 10.

[0038] In some examples, the above-mentioned first member 100 and second member 200 are formed as channel steels of different specifications.

[0039] In some examples, on the first bottom plate portion 101 of the first member 100 located at both ends of the end plate 10 in the first direction, elongated holes 400 are provided.

[0040] Refer to Figure 2 , on the first bottom plate portion 101 of the first member 100 of the above-mentioned end plate 10, an auxiliary hole group 401 is provided. The auxiliary hole group 401 includes a first part 401a composed of a plurality of auxiliary hole units spaced in the first direction and a second part 401b composed of two auxiliary hole units respectively provided at both ends of the first bottom plate portion 101 in the first direction. Among them, the auxiliary hole units constituting the first part 401a and the second part 401b both include spring seat counterbore holes and screw holes. At the same time, the first part 401a of the auxiliary hole group 401 includes a first hole group (such as Figure 2 the a1-a3 auxiliary hole units in Figure 2 ) located in the middle of the first bottom plate portion 101 in the first direction and a second hole group ( Figure 2 the a4-a7 auxiliary hole units in

[0041] ) located on both sides of the first hole group. And the distance between adjacent auxiliary hole units in the first hole group is smaller than the distance between adjacent auxiliary hole units in the second hole group.

[0041] Refer to Figure 2 , at the connection corner position of the first bottom plate portion 101 and the first side wall portion 102 of the first member 100 of the above-mentioned end plate 10, a reinforcing rib structure 402 is provided. In some examples, the reinforcing rib structure 402 is formed as a triangular reinforcing rib.

[0042] In some examples, at both ends of the first plate body portion 101 in the first direction, liquid inlet holes for the battery stack liquid inlet or outlet pipeline to pass through are provided, and flange short pipes are welded at the positions of the liquid inlet holes to protect the battery stack liquid inlet or outlet pipeline.

[0043] On the other hand, the present application discloses a design method of a flow battery, and the method includes:

[0044] Select a first member 100. The first member 100 has a first bottom plate portion 101 and a first side wall portion 102. The first side wall portion 102 is formed by extending along the third direction from the edge line of the first bottom plate portion 101 and has two relatively arranged parts in the second direction. And the extension length of the first bottom plate portion 101 in the first direction is equal to the length of the end plate 10;

[0045] Select a second member 200. The second member 200 has a second bottom plate portion and a second side wall portion 202. The second side wall portion 202 is formed by extending along the third direction from the edge line of the second bottom plate portion and has two relatively arranged parts in the first direction;

[0046] A plurality of first members 100 and second members 200 are assembled by welding to form an end plate 10.

[0047] In a preferred embodiment, the first member 100 and the second member 200 are channel steels of different specifications.

[0048] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand 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 liquid flow battery end plate, characterized in that: The end plate comprises a plurality of: The first member comprises a first bottom plate portion and a first side wall portion, wherein the first side wall portion is formed by extending the edge line of the first bottom plate portion along the third direction and has two parts arranged opposite to each other in the second direction, and the extension length of the first bottom plate portion in the first direction is equal to the length of the end plate, and adjacent first members are arranged at intervals in the second direction to form a connection interval between two adjacent first members; The second component has a second bottom plate portion and a second side wall portion, wherein the second side wall portion is formed by extending the edge line of the second bottom plate portion along the third direction and has two parts arranged opposite to each other in the first direction, and adjacent second components are arranged at intervals along the first direction within the connection interval to form a gap interval between adjacent second components, and the two ends of the second component in the second direction are respectively welded to the two first components.

2. A liquid flow battery end plate according to claim 1, characterized in that: The contact position between the first bottom plate portion and the second bottom plate portion and the contact position between the first side wall portion and the second side wall portion constitute a welding position.

3. A liquid flow battery end plate according to claim 1 or 2, characterized in that: The ratio of the extension length of the gap section in the first direction to the extension length of the second member in the first direction is not greater than 1 / 2.

4. A liquid flow battery end plate according to claim 3, characterized in that: The first component and the second component are channel steels of different specifications.

5. The liquid flow battery end plate according to claim 1, characterized in that: The first plate body is provided with liquid inlet holes at both ends in the first direction for the liquid inlet or liquid outlet pipes of the battery stack to pass through, and flange short pipes are welded at the positions of the liquid inlet holes.

6. The liquid flow battery end plate according to claim 1, characterized in that: An auxiliary hole group is disposed on the first bottom plate portion, and the auxiliary hole group includes a plurality of auxiliary hole units spaced apart in a first direction.

7. A liquid flow battery end plate according to claim 6, characterized in that: The auxiliary hole group includes a first hole group located in the middle of the first bottom plate portion in a first direction and a second hole group located on both sides of the first hole group, and the spacing between adjacent auxiliary hole units in the first hole group is smaller than the spacing between adjacent auxiliary hole units in the second hole group.

8. The liquid flow battery end plate according to claim 1, characterized in that: A reinforcing rib structure is provided between the first bottom plate portion and the first side wall portion.

9. A design method for a flow battery end plate, characterized in that: The method comprises: A first component is selected, wherein the first component has a first bottom plate portion and a first side wall portion, wherein the first side wall portion is formed by extending the edge line of the first bottom plate portion along the third direction and has two portions arranged opposite to each other in the second direction, and the extension length of the first bottom plate portion in the first direction is equal to the length of the end plate; A second component is selected, wherein the second component has a second bottom plate portion and a second side wall portion, wherein the second side wall portion is formed by extending an edge line of the second bottom plate portion along a third direction and has two portions arranged opposite to each other in the first direction; The end plate is formed by assembling a plurality of first members and second members by welding.

10. A method for designing a flow battery end plate according to claim 9, characterized in that: The first component and the second component are channel steels of different specifications.

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