Flow frame device suitable for flow battery

Abstract

The utility model provides a liquid flow frame device suitable for a liquid flow battery, which comprises at least one group of battery structures, each group of battery structures comprises two hollow liquid flow frames, two adjacent groups of battery structures are separated by a middle bipolar plate, a first liquid outlet and a first liquid inlet are symmetrically arranged with respect to the center of the liquid flow frame, and a second liquid outlet and a second liquid inlet are symmetrically arranged with respect to the center of the liquid flow frame. Triangular channels communicated with the middle part of the liquid flow frame are respectively arranged by taking the first liquid outlet and the first liquid inlet as vertexes, a plurality of separation ridges are arranged on the inner surface of each triangular channel, end plates are respectively arranged on two sides of the battery structure, and an insulating pad and a collector plate are sequentially arranged on one side, close to the battery structure, of each end plate. When the liquid flow frame is used, the arranged triangular channels can increase the flow flowing into the liquid flow frame, electrolyte directly flows through the channels between the separation ridges, namely, the circulation channels of the electrolyte are all straight lines instead of curves, so that the flowability of the electrolyte can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of liquid flow battery, concretely to a liquid flow frame device suitable for liquid flow battery. BACKGROUND

[0002] In the charge / discharge of liquid flow battery, the electrolyte is circulated into the battery by pump to realize the charge / discharge function through oxidation-reduction reaction. However, whether the electrolyte can be quickly and uniformly dispersed on the electrode by the liquid flow frame will directly affect the oxidation-reduction reaction in the battery, thereby affecting the overall performance of the battery. Therefore, the design of the liquid flow frame plays an important role in the liquid flow battery.

[0003] At present, for the structure of the liquid flow frame, for example, it can be known from the liquid flow frame device for all-vanadium redox flow battery disclosed in document No. "CN201946690U" that two S-shaped inlet and outlet flow channels are arranged on the liquid flow frame, which prolongs the flow distance of the electrolyte in the liquid flow frame and effectively prevents the occurrence of flow dead zones. However, the electrolyte flow path is limited to the width of one channel, which limits the uniform flow of the electrolyte to the electrode. For another example, it is recorded in the structure of the liquid flow frame for liquid flow battery disclosed in document No. "CN221447218U" that the electrolyte flowing out of the positive electrode inlet hole will pass through the liquid inlet groove, the partition strip one and the liquid outlet groove in turn. The liquid inlet groove, the partition strip one and the liquid outlet groove are perpendicular to each other, so that the channel for the circulation of the electrolyte is curved, and therefore the circulation speed of the electrolyte is slow, which results in low reaction efficiency of the battery. Therefore, based on the above background, the liquid flow frame device suitable for liquid flow battery is proposed. SUMMARY

[0004] The utility model provides a liquid flow frame device suitable for liquid flow battery, with the advantages of setting triangular channels at the liquid flow frame, which can increase the flow and flow rate of the electrolyte flowing into the liquid flow frame, and solve the problems proposed in the above background technology.

[0005] The technical scheme of the utility model is implemented as follows: a liquid flow frame device suitable for liquid flow battery is designed, which comprises at least one group of battery structure. Each group of battery structure comprises two hollow liquid flow frames. The two groups of battery structure adjacent to each other are separated by a middle bipolar plate. A first liquid outlet and a first liquid inlet are symmetrically arranged at the center of the liquid flow frame. Triangular channels in communication with the middle part of the liquid flow frame are arranged at the top points of the first liquid outlet and the first liquid inlet. A plurality of separation ridges are arranged on the inner surface of each triangular channel. A second liquid inlet and a second liquid outlet are also arranged at the center of the liquid flow frame. End plates are arranged on both sides of the battery structure. Insulating pads and current collecting plates are sequentially arranged on the side of the end plate close to the battery structure.

[0006] Preferably, the separation ridges extend to the middle part of the liquid flow frame and are fan-shapedly distributed with the first liquid outlet and the first liquid inlet as the top points.

[0007] Preferably, the second liquid inlet, the second liquid outlet, the first liquid outlet, the first liquid inlet and the two triangular channels are symmetrically distributed along the center of the liquid flow frame, and sealing rings are arranged at the openings on both sides of the second liquid inlet, the second liquid outlet, the first liquid outlet and the first liquid inlet.

[0008] Preferably, the distance from the one end of the separation ridge away from the center of the liquid flow frame to the center of the first liquid outlet and the first liquid inlet is equal.

[0009] Preferably, the triangular channel is located inside or on the surface of the liquid flow frame.

[0010] Preferably, the two triangular channels are diagonally symmetrical about the diagonal line of the liquid flow frame.

[0011] Preferably, the two triangular channels are centrally symmetrical with the center of the liquid flow frame as the base point.

[0012] Preferably, the two liquid flow frames in each group of battery structures are arranged back to back, and end bipolar plates are arranged between the liquid flow frames and the current collecting plates.

[0013] Preferably, electrodes are arranged in the liquid flow frame.

[0014] Preferably, the end plate, the insulating pad, the current collecting plate, the middle bipolar plate and the four corner edges of the liquid flow frame are provided with a plurality of mounting holes, and fastening bolts are arranged in the mounting holes.

[0015] Compared with the prior art, the triangular channel can increase the flow rate of the electrolyte flowing into the liquid flow frame, the electrolyte directly flows through the channel between the separation ridges, that is, the flow channel of the electrolyte is a straight line rather than a curve, so the flowability of the electrolyte can be increased. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 It is a structural schematic view of one side of the present application.

[0018] Figure 2 It is a structural schematic view of the other side of the present application.

[0019] Figure 3 It is a structural schematic view of the liquid flow frame in the present application Figure 1 .

[0020] Figure 4 It is a structural schematic view of the liquid flow frame in the present applicationFigure 2 .

[0021] In the figure: 1, mounting hole; 2, second liquid outlet; 3, first liquid outlet; 4, separation ridge; 5, second liquid inlet; 6, first liquid inlet; 7, triangular channel; 8, liquid flow frame; 9, middle bipolar plate; 10, current collector plate; 11, end plate; 12, insulating pad; 13, end bipolar plate. DETAILED DESCRIPTION

[0022] The technical scheme of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] Referring to Figures 1 to 4 , the present application provides a technical scheme: a liquid flow frame device suitable for liquid flow battery, which comprises at least one group of battery structure, as shown in Figure 1 and Figure 2 , each group of battery structure comprises two hollow liquid flow frames 8, and the two groups of battery structures adjacent to each other are separated by a middle bipolar plate 9, the hole in the middle of the liquid flow frame 8 is a square hole, and the two liquid flow frames 8 in each group of battery structure are arranged back to back.

[0024] As shown in Figure 3 , a first liquid outlet 3 and a first liquid inlet 6 are symmetrically arranged with the center of the liquid flow frame 8, and a triangular channel 7 in communication with the middle of the liquid flow frame 8 is arranged with the first liquid outlet 3 and the first liquid inlet 6 as the vertexes, respectively, and a plurality of separation ridges 4 are arranged on the inner surface of each triangular channel 7. As shown in Figure 3 , the separation ridges 4 extend to the middle of the liquid flow frame 8 with the first liquid outlet 3 and the first liquid inlet 6 as the vertexes and are distributed in a fan shape, respectively, and the distance from the end of the separation ridges 4 away from the center of the liquid flow frame 8 to the center of the first liquid outlet 3 and the first liquid inlet 6 is equal, so that the electrolyte can flow uniformly between the separation ridges 4.

[0025] Next, a second liquid inlet 5 and a second liquid outlet 2 are also arranged with the center of the liquid flow frame 8, specifically, the second liquid inlet 5, the second liquid outlet 2, the first liquid outlet 3, the first liquid inlet 6 and the two triangular channels 7 are symmetrically distributed along the center of the liquid flow frame 8.

[0026] End plates 11 are arranged on both sides of the battery structure, respectively, and insulating pads 12 and current collector plates 10 are arranged on the side of the end plates 11 close to the battery structure in sequence, and the end plates 11, the insulating pads 12, the current collector plates 10, the middle bipolar plates 9 and the liquid flow frames 8 have a plurality of mounting holes 1 at the four corners, and fastening bolts are arranged in the mounting holes 1, as shown in Figure 1 andFigure 2 As shown in the figure, an end bipolar plate 13 is arranged between the liquid flow frame 8 and the current collecting plate 10.

[0027] Based on the above embodiment, the electrode is placed in the liquid flow frame 8, and a sealing ring is arranged at the opening on both sides of the second liquid inlet 5, the second liquid outlet 2, the first liquid outlet 3 and the first liquid inlet 6, so as to increase the sealing performance. The first liquid inlet 6 is used for introducing the positive electrolyte, and the first liquid outlet 3 is used for the positive electrolyte to flow out; and the second liquid inlet 5 is used for introducing the negative electrolyte, and the negative electrolyte finally flows out from the second liquid outlet 2.

[0028] Based on the above embodiment, it is necessary to point out that, as shown in the figure, the triangular channel 7 arranged can increase the flow to the liquid flow frame 8, and each separation ridge 4 can divide the electrolyte and make the electrolyte flow into the liquid flow frame 8 at a uniform speed, and the electrolyte directly flows through the channel between the separation ridges 4, and the flow channel is a straight line rather than a curve, so that the flow of the electrolyte can be increased. Figure 3

[0029] And the opening size of the two adjacent separation ridges 4 is larger when it is closer to the center of the liquid flow frame 8, so that when the electrolyte flows into the liquid flow frame 8 from the small opening to the large opening, the electrolyte can intensify the rolling, so that the electrolyte and the electrode can have a better contact effect.

[0030] Based on the above embodiment, the triangular channel 7 and the liquid flow frame 8 in the application exist in two cases, that is, the triangular channel 7 is located inside or on the surface of the liquid flow frame 8, Figure 3 As shown in the figure, the triangular channel 7 is located on the surface of the liquid flow frame 8, Figure 4 As shown in the figure, the triangular channel 7 is located inside the liquid flow frame 8;

[0031] There are two kinds of distribution modes of the two triangular channels 7, that is, Figure 3 As shown in the figure, the first kind is that the two triangular channels 7 are arranged in a central symmetry with the center of the liquid flow frame 8 as the center; as shown in the figure, Figure 4 As shown in the figure, the second kind is that the two triangular channels 7 are symmetrical about the diagonal line of the liquid flow frame 8, and as shown in the figure, Figure 3 and Figure 4 As shown in the figure, both of the two modes can make the triangular channel 7 and the hole in the middle of the liquid flow frame 8 communicate in a "fan surface", and can increase the flow of the electrolyte.

[0032] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.​

Claims

1. A flow frame device suitable for use in a flow battery, characterized in that, The application relates to a battery structure. Each battery structure comprises two hollow flow frames (8), and two adjacent battery structures are separated by a middle bipolar plate (9). A first liquid outlet (3) and a first liquid inlet (6) are symmetrically arranged at the center of the flow frame (8), and a triangular channel (7) in communication with the middle part of the flow frame (8) is arranged at the top point of the first liquid outlet (3) and the first liquid inlet (6) respectively, and a plurality of separation ridges (4) are arranged on the inner surface of each triangular channel (7). A second liquid inlet (5) and a second liquid outlet (2) are also arranged at the center of the flow frame (8). End plates (11) are arranged on the two sides of the battery structure, and an insulating pad (12) and a current collecting plate (10) are sequentially arranged on the side of the end plate (11) close to the battery structure.

2. The flow frame apparatus suitable for use in a flow battery of claim 1, wherein, The separation ridges (4) extend to the middle part of the flow frame (8) and are distributed in a fan shape with the first liquid outlet (3) and the first liquid inlet (6) as the top points.

3. The flow frame apparatus suitable for use in a flow battery of claim 2, wherein, The second liquid inlet (5), the second liquid outlet (2), the first liquid outlet (3), the first liquid inlet (6) and the two triangular channels (7) are symmetrically distributed along the center of the flow frame (8), and sealing rings are arranged at the opening sides of the second liquid inlet (5), the second liquid outlet (2), the first liquid outlet (3), the first liquid inlet (6) and the two triangular channels (7).

4. The flow frame apparatus suitable for use in a flow battery of claim 3, wherein, The distance between the end of the separation ridge (4) away from the center of the flow frame (8) and the center of the first liquid outlet (3) and the first liquid inlet (6) is equal.

5. The flow frame apparatus suitable for use in a flow battery of claim 4, wherein, The triangular channel (7) is located inside or on the surface of the flow frame (8).

6. The flow frame apparatus suitable for use in a flow battery of claim 5, wherein, The two triangular channels (7) are symmetrically arranged about the diagonal line of the flow frame (8).

7. The liquid flow frame apparatus suitable for use in a liquid flow battery of claim 5, wherein, The two triangular channels (7) are symmetrically arranged with the center of the flow frame (8) as the base point.

8. The flow frame apparatus suitable for use in a flow battery of claim 6 or 7, wherein, The two flow frames (8) in each battery structure are arranged back to back, and an end bipolar plate (13) is arranged between the flow frame (8) and the current collecting plate (10).

9. The flow frame apparatus suitable for use in a flow battery of claim 8, wherein, An electrode is arranged in the flow frame (8).

10. The flow frame apparatus suitable for use in a flow battery of claim 9, wherein, The end plate (11), the insulating pad (12), the current collecting plate (10), the middle bipolar plate (9) and the flow frame (8) are provided with a plurality of mounting holes (1) at the four corner edges, and fastening bolts are arranged in the mounting holes (1).

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