Liquid flow frame of side liquid inlet flow channel

Abstract

The utility model relates to the field of flow batteries, in particular to a flow frame of a side liquid inlet runner, which comprises a plate body, a hollow groove structure is arranged in the middle of the plate body, a liquid inlet runner and a liquid outlet runner are arranged on the plate surface of the plate body, the liquid inlet runner is communicated with the hollow groove structure and one side edge of the plate body, and the liquid outlet runner is communicated with the hollow groove structure and one side edge of the plate body. Compared with the prior art, the electrode plate has the beneficial effects that the hollow groove structure is communicated with the edge of one side of the plate body through the liquid flow channel, and the hollow groove structure is communicated with the edge of one side of the plate body through the liquid outlet flow channel, so that a side liquid inlet mode is realized, namely electrolyte of each electrode forms independent circulation and does not influence each other; and the condition that electrolyte in a plurality of electrodes is interrupted at the same time due to channel blockage in the prior art is greatly avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of flow batteries, in particular to a flow frame with a side inlet flow channel. Background Art

[0002] A flow battery is a new type of storage battery based on electrochemical energy storage technology, which consists of a stack unit, an electrolyte, an electrolyte storage tank, etc.; among them, the stack unit is the core component of the flow battery, and the core component in the stack unit is the flow frame. The flow frame is the necessary flow domain for introducing the electrolyte into multiple electrodes. Therefore, the design of the flow channel in the flow frame is very important.

[0003] At present, most of the flow frames in the existing stack units form flow channels by opening through holes perpendicular to the plate surface of the flow frame and connecting the through holes in series to form a channel, so as to realize the positive and negative electrolyte solutions entering and leaving each electrode in the stack unit through each channel. For example, the flow battery structure for testing in the existing patent CN220272519U; however, since there are more or less some impurities in the electrode liquid, in the way of connecting the through holes in series, the channel is likely to be blocked during use. Once blocked, the electrolyte circulation in the electrodes behind the blocked position will be interrupted, greatly affecting the performance of the stack unit. Summary of the Utility Model

[0004] In view of the above problems, an embodiment of the utility model provides a flow frame with a side inlet flow channel.

[0005] The flow frame with a side inlet flow channel provided by the embodiment of the utility model includes a plate body. The middle part of the plate body is a hollow groove structure. An inlet flow channel and an outlet flow channel are opened on the plate surface of the plate body. The inlet flow channel communicates with the hollow groove structure and one side edge of the plate body, and the outlet flow channel communicates with the hollow groove structure and one side edge of the plate body.

[0006] Compared with the prior art, the beneficial effect of the utility model is that: by connecting the hollow groove structure and one side edge of the plate body through the flow channel, and connecting the hollow groove structure and one side edge of the plate body through the outlet flow channel, the side inlet liquid feeding mode is realized, that is, the electrolyte of each electrode forms an independent cycle and does not affect each other, greatly avoiding the situation that the electrolyte in multiple electrodes is interrupted at the same time due to channel blockage in the existing patent.

[0007] Preferably, spoiler bars are arranged in both the inlet flow channel and the outlet flow channel.

[0008] Preferably, both the inlet flow channel and the outlet flow channel include a liquid collecting part communicating with the side edge of the plate body and a guiding part communicating the liquid collecting part with the hollow groove structure.

[0009] Preferably, the plate body is in a rectangular plate structure.

[0010] Preferably, the hollow groove structure is in a rectangular groove structure.

[0011] Preferably, the guiding parts in the liquid inlet flow channel and the liquid outlet flow channel are arranged opposite to each other along a set of side edges of the rectangular groove.

[0012] Preferably, the width of the liquid collecting part is greater than the width of the guiding part.

[0013] Preferably, a tapered transition part is arranged between the liquid collecting part and the guiding part.

[0014] Preferably, a first clamping groove is arranged between the liquid collecting part and the side edge of the plate body; a second clamping groove is arranged on the plate body opposite to the first clamping groove.

[0015] Preferably, the first clamping groove and the second clamping groove are in a convex shape. Description of the Drawings

[0016] The drawings described herein are used to provide a further understanding of the present utility model, form a part of this application, and do not constitute a limitation to the present utility model. In the drawings:

[0017] Figure 1 is a schematic perspective view of a liquid flow frame provided by the present utility model;

[0018] Figure 2 is a schematic front view of a liquid flow frame provided by the present utility model;

[0019] Figure 3 is a schematic rear view of a liquid flow frame provided by the present utility model;

[0020] Figure 4 is a schematic structural view of a stack unit after assembling the liquid flow frame of the present utility model;

[0021] Figure 5 is a schematic structural view of a connector used in cooperation with the liquid flow frame of the present utility model;

[0022] Figure 6 is a schematic view of the assembly effect of the connector provided by the present utility model;

[0023] Figure 7 is a schematic perspective view of a second liquid flow frame provided by the present utility model;

[0024] Figure 8 is a schematic structural view of a connector used in cooperation with the second liquid flow frame.

[0025] Among them, the plate body 1, the hollow groove structure 2, the liquid inlet flow channel 3, the liquid outlet flow channel 4, the flow disturbing strip 5, the liquid inlet 6, the liquid outlet 7, the first clamping groove 8, and the second clamping groove 9. Detailed Embodiments

[0026] To make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the embodiments and the drawings. Herein, the illustrative embodiments of the present utility model and their descriptions are used to explain the present utility model, but do not limit the present utility model.

[0027] Refer to Figures 1-3 , a liquid flow frame with a side inlet liquid flow channel provided by an embodiment of the present utility model includes a plate body 1. The middle part of the plate body 1 is a hollow groove structure 2. Liquid inlet channels 3 and liquid outlet channels 4 are provided on the plate surface of the plate body 1. The liquid inlet channels 3 communicate the hollow groove structure 2 with one side edge of the plate body 1, and the liquid outlet channels 4 communicate the hollow groove structure 2 with one side edge of the plate body 1.

[0028] During implementation, turbulence bars 5 are provided in both the liquid inlet channels 3 and the liquid outlet channels 4. The turbulence bars 5 are in a hexagonal structure. The surface of the turbulence bars 5 is flush with the surface of the plate body 1. The length of the turbulence bars 5 is 30 - 100 mm. The widthwise spacing between the turbulence bars 5 is 2 - 10 mm, and the lengthwise spacing is 30 - 100 mm.

[0029] Both the liquid inlet channels 3 and the liquid outlet channels 4 include a liquid collecting part communicating with the side of the plate body 1 and a guiding part communicating the liquid collecting part with the hollow groove structure 2.

[0030] The plate body 1 is in a rectangular plate structure. The hollow groove structure 2 is in a rectangular groove structure.

[0031] The guiding parts in the liquid inlet channels 3 and the liquid outlet channels 4 are oppositely arranged along a set of side edges of the rectangular groove.

[0032] The width of the liquid collecting part is greater than the width of the guiding part.

[0033] A tapered transition part is provided between the liquid collecting part and the guiding part. That is, the liquid inlet channels 3 and the liquid outlet channels 4 are in an overall funnel shape, realizing a higher electrolyte flow rate inside the stack unit. The increased electrolyte flow rate can strengthen the mass transfer inside the stack unit and improve the reaction rate.

[0034] During implementation, refer to Figure 4 , after assembling the liquid flow frame of the present utility model, liquid inlet ports 6 in an upper row and liquid outlet ports 7 in a lower row are formed on both opposite sides of the stack unit. During implementation, in combination with Figure 5 as shown in the connector, one adapted connector is installed at each row of liquid inlet ports 6 or liquid outlet ports 7. Each liquid inlet pipe in the connector is opposite to the liquid inlet or outlet port of an electrode. The assembly effect is as shown in Figure 6As shown, during the working process, the connector at the upper position on one side can be used for positive electrolyte inlet, the connector at the lower position on the same side can be used for negative electrolyte outlet, the connector at the upper position on the opposite side can be used for negative electrolyte inlet, and the connector at the lower position can be used for positive electrolyte outlet. The positive and negative electrolyte circulate separately, and an independent circulation is formed between each single electrode, greatly avoiding the situation in the existing patent where the electrolyte in multiple electrodes is interrupted simultaneously due to channel blockage.

[0035] Regarding the effect of the flow frame of the present invention, our company made two stack units respectively. One is a stack unit with the existing front and back liquid inlet, and the other is a stack unit with side liquid inlet of the present invention. Both stack units are composed of three groups of single electrodes, and all the materials selected for the stack are the same. In the comparative test, an internal resistance tester (a high-precision battery internal resistance / voltage tester BP2080S produced by BiYouDe Technology) was used to test the internal resistance of the two stack units respectively. The internal resistance of the stack unit with front and back liquid inlet is 0.97Ω, and the internal resistance of the stack unit with side liquid inlet is 0.86Ω. Obviously, the internal resistance of the stack unit with side liquid inlet is smaller. Then, the two stack units were connected to a charge and discharge tester (the charge and discharge tester is a tester produced by Neware, model CT-4800Tn-5V12A -204n). After the charge and discharge cycle, the charge and discharge efficiency was observed. The average charge and discharge efficiency of the stack unit with front and back liquid inlet is about 76%, and the average charge and discharge efficiency of the stack unit with side liquid inlet is about 84%. From the above data, it can be concluded that the design of the side liquid inlet flow frame can reduce the internal resistance of the battery, make the electrolyte flow more smoothly, and increase the charge and discharge efficiency of the stack unit.

[0036] See Figure 7 In the second flow frame shown, a first clamping groove 8 is provided between the liquid collecting part and the side of the plate body 1; a second clamping groove 9 is provided on the plate body 1 opposite to the first clamping groove 8. The first clamping groove 8 and the second clamping groove 9 are in a convex shape. Correspondingly, the connector adopts Figure 8 the structure shown, with a clamping corner added at the bottom to match the clamping groove, achieving the effect of enhancing the assembly firmness of the connector during the assembly process.

[0037] The above are only the preferred embodiments of the present utility model and are not intended to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model are included in the protection scope of the present utility model.

Claims

1. A liquid flow frame with a side inlet liquid flow channel, comprising a plate body, and the middle part of the plate body is a hollow groove structure, characterized in that, On the plate surface of the plate body, a liquid inlet flow channel and a liquid outlet flow channel are provided, and the liquid inlet flow channel communicates with the hollow groove structure and one side edge of the plate body, and the liquid outlet flow channel communicates with the hollow groove structure and one side edge of the plate body.

2. The liquid flow frame of the side liquid inlet flow channel according to claim 1, characterized in that Turbulence bars are provided in both the liquid inlet flow channel and the liquid outlet flow channel.

3. The liquid flow frame of the side inlet liquid flow channel according to claim 1, characterized in that, Both the liquid inlet flow channel and the liquid outlet flow channel include a liquid collecting portion communicating with the side of the plate body, and a diversion portion communicating the liquid collecting portion with the hollow groove structure.

4. The liquid flow frame of the side inlet liquid flow channel according to claim 1, characterized in that, The plate body has a rectangular plate structure.

5. The liquid flow frame of the side inlet liquid flow channel according to claim 3, characterized in that, The hollow groove structure has a rectangular groove structure.

6. The liquid flow frame of the side inlet liquid flow channel according to claim 5, characterized in that The diversion portions in the liquid inlet flow channel and the liquid outlet flow channel are oppositely arranged along a set of side edges of the rectangular groove.

7. The liquid flow frame of the side inlet liquid flow channel according to claim 3, characterized in that, The width of the liquid collecting portion is greater than the width of the diversion portion.

8. The liquid flow frame of the side inlet liquid flow channel according to claim 7, characterized in that, A tapered transition portion is provided between the liquid collecting portion and the diversion portion.

9. The liquid flow frame of the side liquid inlet flow channel according to claim 3, wherein A first clamping groove is provided between the liquid collecting portion and the side of the plate body; a second clamping groove is provided on the plate body opposite to the first clamping groove.

10. The liquid flow frame of the side inlet liquid flow channel according to claim 8, characterized in that, The first clamping groove and the second clamping groove are in a convex shape.

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