Flow cell panel frame in horizontal overturning installation form, single cell and cell stack

Abstract

The invention belongs to the technical field of flow batteries, and discloses a flow battery panel frame, a single battery and a battery stack.The flow battery panel frame comprises an electrolyte inlet, an electrolyte outlet and an electrode cavity, and the electrode cavity is divided into a negative electrode cavity and a positive electrode cavity through a membrane; a positive electrode overturning hole and a negative electrode overturning hole are also formed in two sides of the electrode cavity; electrolyte tanks are arranged on the opposite upper and lower end faces of the plate frame, and the electrolytic tank on the lower end face of the plate frame is overlapped with the electrolytic tank on the upper end face of the plate frame after horizontally rotating by 180 degrees; when the plurality of plate frames are stacked, the electrolyte grooves of the upper plate frame and the lower plate frame form a positive electrolyte flow channel and a negative electrolyte flow channel; when the multiple plate frames are stacked, a double-sided electrolyte runner is formed, the breadth is fully utilized, thick areas are reduced, the shrinkage defect is reduced during injection molding production, the deformation of the plate frames is reduced, and the product reliability is improved. The breadth utilization rate is improved, used materials are reduced, and the material cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of flow batteries, and particularly relates to a flow battery panel frame, a single cell, and a battery stack with a horizontal flipping installation form. Background Art

[0002] With the development of society and economy, the demand for energy is increasing day by day, and the environmental pressure caused by the large consumption of fossil energy is becoming increasingly prominent. Renewable energy power generation such as wind energy / solar energy is affected by factors such as time / day and night / season, and has obvious discontinuous / unstable and uncontrollable non-steady state characteristics. Therefore, the technology of large-scale and efficient energy storage has been highly valued. Among them, flow batteries are recognized as the most promising energy storage technology due to their high safety / large energy storage scale / high efficiency / long life and other characteristics.

[0003] A single cell is a basic component unit in a flow battery stack, and its structural form directly affects the size / power / performance of the battery.

[0004] The existing structural forms of flow battery single cells are as follows:

[0005] 1. Centered on the diaphragm, symmetrically distributed on both sides, with electrodes, panel frames, and bipolar plates arranged in sequence on both sides.

[0006] 2. The panel frame is designed in an integrated form, but it is impossible to make full use of the panel frame. Most of them are in the form of single-sided flow channels, so more panel frame materials are used and the cost is higher.

[0007] 3. Some adopt the form of double-sided flow channels, but it is also impossible to cover the panel frame with flow channels. The main reason for not being able to make the double-sided flow channels cover the panel frame is the lack of a reasonable structural layout, resulting in the sealing gasket pressing on the flow channels and thus unable to be sealed.

[0008] In summary, the existing panel frames of flow batteries do not have a reasonable structural layout, cannot make full use of the panel frame area, and have a high cost. Summary of the Invention

[0009] In view of the above problems, the present invention provides a flow battery panel frame, a single cell, and a battery stack with a horizontal flipping installation form, and adopts the following technical solutions:

[0010] A flow battery panel frame with a horizontal flipping installation form includes a positive electrolyte inlet, a negative electrolyte inlet, a positive electrolyte outlet, a negative electrolyte outlet, and an electrode cavity. The electrode cavity is divided into a negative electrode cavity and a positive electrode cavity by a membrane;

[0011] The electrode cavity is located at the center of the plate frame. On both sides of the electrode cavity, there are also a first positive electrode flipping hole, a second positive electrode flipping hole, a first negative electrode flipping hole, and a second negative electrode flipping hole, and they satisfy the following: after the plate frame rotates horizontally by 180°, the second positive electrode flipping hole coincides with the first positive electrode flipping hole, and the second negative electrode flipping hole coincides with the first negative electrode flipping hole;

[0012] On the opposite upper and lower end faces of the plate frame, there are electrolyte tanks respectively, and they satisfy the following: after the electrolytic tank on the lower end face of the plate frame rotates horizontally by 180°, it coincides with the electrolytic tank on the upper end face of the plate frame;

[0013] When multiple said plate frames are stacked, after horizontally rotating the upper plate frame above the current plate frame by 180° and aligning it with the current plate frame, the electrolyte tank on the upper end face of the current plate frame and the electrolyte tank on the lower end face of the upper plate frame form a positive electrode electrolyte flow channel and a negative electrode electrolyte channel;

[0014] Among them, the positive electrode electrolyte flow channel is communicated with the two positive electrode flipping holes, the positive electrode cavity, the positive electrode electrolyte inlet, and the positive electrode electrolyte outlet of the current plate frame; the negative electrode electrolyte channel is communicated with the two negative electrode flipping holes, the negative electrode cavity, the negative electrode electrolyte inlet, and the negative electrode electrolyte outlet of the upper plate frame.

[0015] Further, the plate frame is square, and the positive electrode electrolyte inlet, the negative electrode electrolyte inlet, the positive electrode electrolyte outlet, and the negative electrode electrolyte outlet are respectively arranged at the four corners of the plate frame.

[0016] Further, the positive electrode electrolyte inlet and the positive electrode electrolyte outlet are arranged along the diagonal of the plate frame, the negative electrode electrolyte inlet and the negative electrode electrolyte outlet are arranged along the diagonal of the plate frame, and the positive electrode electrolyte inlet and the negative electrode electrolyte inlet are respectively located at both ends of the long side of the plate frame.

[0017] Further, on the upper end face of the plate frame, there are a first positive electrode electrolyte tank, a second positive electrode electrolyte tank, a first negative electrode electrolyte tank, a second negative electrode electrolyte tank, a negative electrode dispersion flow channel, and a negative electrode collection flow channel;

[0018] On the lower end face of the plate frame opposite to the upper end face, there are a third positive electrode electrolyte tank, a fourth positive electrode electrolyte tank, a third negative electrode electrolyte tank, a fourth negative electrode electrolyte tank, a positive electrode dispersion flow channel, and a positive electrode collection flow channel;

[0019] The positive electrode electrolyte flows through the positive electrode electrolyte inlet, the first positive electrode electrolyte tank, the first positive electrode flipping hole, the positive electrode dispersion flow channel, the positive electrode cavity, the positive electrode collection flow channel, the second positive electrode flipping hole, the second positive electrode electrolyte tank, and the positive electrode electrolyte outlet in sequence;

[0020] The negative electrode electrolyte flows successively through the negative electrode electrolyte inlet, the third negative electrode electrolyte tank, the first negative electrode turning hole, the negative electrode dispersion flow channel, the negative electrode electrode cavity, the negative electrode converging flow channel, the second negative electrode turning hole, the fourth negative electrode electrolyte tank, and the negative electrode electrolyte outlet.

[0021] Furthermore, the third positive electrode electrolyte tank is located directly below the first positive electrode electrolyte tank. One end of the third positive electrode electrolyte tank is connected to the positive electrode electrolyte inlet, and the other end is closed. The fourth positive electrode electrolyte tank is located directly below the second positive electrode electrolyte tank. One end of the fourth positive electrode electrolyte tank is connected to the positive electrode electrolyte outlet, and the other end is closed.

[0022] The third positive electrode electrolyte tank has the same structure as the second positive electrode electrolyte tank, and the fourth positive electrode electrolyte tank has the same structure as the first positive electrode electrolyte tank.

[0023] Furthermore, one end of the first negative electrode electrolyte tank is connected to the negative electrode electrolyte inlet, and the other end is closed. The third negative electrode electrolyte tank is located below the first negative electrode electrolyte tank. One end of the second negative electrode electrolyte tank is connected to the negative electrode electrolyte outlet, and the other end is closed. The fourth negative electrode electrolyte tank is located below the second negative electrode electrolyte tank.

[0024] Among them, the first negative electrode electrolyte tank has the same structure as the fourth negative electrode electrolyte tank, and the second negative electrode electrolyte tank has the same structure as the third negative electrode electrolyte tank.

[0025] Furthermore, when multiple plate frames are stacked, the fourth positive electrode electrolyte tank on the lower end face of the upper plate frame and the first positive electrode electrolyte tank on the upper end face of the current plate frame are sealed to form the first positive electrode electrolyte flow channel. The third positive electrode electrolyte tank on the lower end face of the upper plate frame and the second positive electrode electrolyte tank on the upper end face of the current plate frame are sealed to form the second positive electrode electrolyte flow channel.

[0026] The fourth negative electrode electrolyte tank on the lower end face of the upper plate frame and the first negative electrode electrolyte tank on the upper end face of the current plate frame are sealed to form the first negative electrode electrolyte flow channel. The third negative electrode electrolyte tank on the lower end face of the upper plate frame and the second negative electrode electrolyte tank on the upper end face of the current plate frame are sealed to form the second negative electrode electrolyte flow channel.

[0027] Furthermore, the positive electrode electrolyte inlet, the first positive electrode electrolyte flow channel, the first positive electrode turning hole of the current plate frame, the positive electrode dispersion flow channel of the current plate frame, the positive electrode electrode cavity of the current plate frame, the positive electrode converging flow channel of the current plate frame, the second positive electrode turning hole of the current plate frame, the second positive electrode electrolyte flow channel, and the positive electrode electrolyte outlet are connected in sequence.

[0028] The negative electrode electrolyte inlet, the first negative electrode electrolyte flow channel, the first negative electrode turning hole of the upper plate frame, the negative electrode dispersion flow channel of the upper plate frame, the negative electrode electrode cavity of the upper plate frame, the negative electrode collecting flow channel of the upper plate frame, the second positive electrode turning hole of the upper plate frame, the second negative electrode electrolyte flow channel, and the negative electrode electrolyte outlet are connected in sequence.

[0029] The present invention also provides a flow single cell, which includes the flow battery plate frame, membrane, positive electrode, negative electrode, and bipolar plate in the horizontal turning installation form described above;

[0030] Among them, the membrane is arranged in the electrode cavity of the plate frame. The membrane divides the electrode cavity of the plate frame to form a negative electrode electrode cavity on the upper end face and a positive electrode electrode cavity on the lower end face. The negative electrode is arranged in the negative electrode electrode cavity, the positive electrode is located in the positive electrode electrode cavity, and the bipolar plate is stacked above the negative electrode.

[0031] The present invention also provides a flow battery stack, which includes a plurality of the above-mentioned flow single cells. When stacking multiple single cells, the single cell above the current single cell is horizontally rotated 180 degrees for stacking installation.

[0032] Advantages of the present invention:

[0033] 1. The flow battery plate frame of the present invention is provided with electrolyte tanks on both opposite upper and lower end faces. When a plurality of the plate frames are stacked, a double-sided electrolyte flow channel is formed, making full use of the area, reducing the area with a relatively thick thickness. During injection molding production, the shrinkage defect is reduced, the deformation of the plate frame is reduced, and the product reliability is improved.

[0034] 2. The flow battery plate frame of the present invention improves the area utilization rate, reduces the materials used, and thus also reduces the material cost.

[0035] Other features and advantages of the present invention will be described in the subsequent description, and some of them will be obvious from the description or can be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the description and the drawings. Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0037] Figure 1 Shows an axonometric view of a flow battery plate frame in a horizontal turning installation form according to an embodiment of the present invention;

[0038] Figure 2The upper end face structure schematic diagram of a liquid flow battery panel frame in a horizontal flipping installation form according to an embodiment of the present invention is shown;

[0039] Figure 3 The lower end face structure schematic diagram of a liquid flow battery panel frame in a horizontal flipping installation form according to an embodiment of the present invention is shown;

[0040] Figure 4 The exploded view of two liquid flow battery panel frames stacked in a horizontal flipping installation form according to an embodiment of the present invention is shown.

[0041] In the figure: 1, positive electrolyte inlet; 2, negative electrolyte inlet; 3, positive electrolyte outlet; 4, negative electrolyte outlet; 5, electrode cavity; 6, first positive flipping hole; 7, second positive flipping hole; 8, first negative flipping hole; 9, second negative flipping hole; 10, first positive electrolyte tank; 11, second positive electrolyte tank; 12, first negative electrolyte tank; 13, second negative electrolyte tank; 14, negative dispersion flow channel; 15, negative collection flow channel; 16, third positive electrolyte tank; 17, fourth positive electrolyte tank; 18, third negative electrolyte tank; 19, fourth negative electrolyte tank; 20, positive dispersion flow channel; 21, positive collection flow channel. Detailed implementation manners

[0042] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. 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.

[0043] It should be noted that the terms "first", "second", etc. in this application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so as to implement the embodiments of the present application described herein. In this application, the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. are based on the orientation or positional relationships shown in the accompanying drawings.

[0044] The present invention provides a liquid flow battery panel frame in a horizontal flipping installation form, which improves the utilization rate of the panel frame area, reduces the deformation of the panel frame, reduces defects, reduces material usage, and lowers costs; by horizontally flipping and installing each single cell, a complete battery stack can be assembled.

[0045] Such as Figure 1As shown in the figure, a liquid flow battery panel frame with a horizontal flipping installation form includes a positive electrolyte inlet 1, a negative electrolyte inlet 2, a positive electrolyte outlet 3, and a negative electrolyte outlet 4.

[0046] For example, the panel frame is square, and the positive electrolyte inlet 1, the negative electrolyte inlet 2, the positive electrolyte outlet 3, and the negative electrolyte outlet 4 are respectively arranged at the four corners of the panel frame.

[0047] It should be noted that the sizes of the electrolyte inlets and outlets are the same. After the panel frame is horizontally rotated by 180°, the outlet of the electrolyte can be used as the inlet, and similarly, the inlet can also be used as the outlet.

[0048] As Figure 1 shown in the figure, the electrode cavity 5 is located at the center of the panel frame. On both sides of the electrode cavity 5, there are also a first positive flipping hole 6, a second positive flipping hole 7, a first negative flipping hole 8, and a second negative flipping hole 9, and it satisfies that after the panel frame is horizontally rotated by 180°, the second positive flipping hole 7 coincides with the first positive flipping hole 6, and the second negative flipping hole 9 coincides with the first negative flipping hole 8.

[0049] Electrolyte grooves are arranged on the opposite upper and lower end faces of the panel frame, and it satisfies that after the electrolytic groove on the lower end face of the panel frame is horizontally rotated by 180°, it coincides with the electrolytic groove on the upper end face of the panel frame.

[0050] As Figure 4 shown in the figure, when multiple said panel frames are stacked, after the upper panel frame above the current panel frame is horizontally rotated by 180° and aligned with the current panel frame, the electrolyte groove on the upper end face of the current panel frame and the electrolyte groove on the lower end face of the upper panel frame form a positive electrolyte flow channel and a negative electrolyte channel.

[0051] Among them, the positive electrolyte flow channel is communicated with the two positive flipping holes, the positive electrode cavity 5, the positive electrolyte inlet 1, and the positive electrolyte outlet 3 of the current panel frame; the negative electrolyte flow channel is communicated with the two negative flipping holes, the negative electrode cavity 5, the negative electrolyte inlet 2, and the negative electrolyte outlet 4 of the upper panel frame.

[0052] For example, the positive electrolyte inlet 1 and the positive electrolyte outlet 3 are arranged along the diagonal of the panel frame, the negative electrolyte inlet 2 and the negative electrolyte outlet 4 are arranged along the diagonal of the panel frame, and the positive electrolyte inlet 1 and the negative electrolyte inlet 2 are respectively located at both ends of the long side of the panel frame, which is convenient for the layout of the electrolyte flow channels.

[0053] As Figure 2 shown in the figure, for example, on the upper end face of the panel frame, there are a first positive electrolyte groove 10, a second positive electrolyte groove 11, a first negative electrolyte groove 12, a second negative electrolyte groove 13, a negative dispersion flow channel 14, and a negative collection flow channel 15.

[0054] As Figure 3As shown, on the lower end surface opposite to the upper end surface of the plate frame, a third positive electrolyte tank 16, a fourth positive electrolyte tank 17, a third negative electrolyte tank 18, a fourth negative electrolyte tank 19, a positive dispersion flow channel 20, and a positive collection flow channel 21 are provided.

[0055] For example, the electrode cavity 5 is square, the electrode cavity 5 is arranged in the middle of the plate frame, and the electrode cavity 5 is divided by a membrane to form a negative electrode cavity 5 on the upper end surface and a positive electrode cavity 5 on the lower end surface.

[0056] Among them, the first positive turning hole 6 and the first negative turning hole 8 are located on one side of the electrode cavity 5, and the second positive turning hole 7 and the second negative turning hole 9 are located on the other side of the electrode cavity 5.

[0057] One end of the negative dispersion flow channel 14 is communicated with the first negative turning hole 8, the other end of the negative dispersion flow channel 14 is communicated with one end of the negative collection flow channel 15 to form an electrolyte flow channel surrounding the negative electrode cavity 5, and the other end of the negative collection flow channel 15 is communicated with the second negative turning hole 9.

[0058] One end of the positive dispersion flow channel 20 is communicated with the first positive turning hole 6, the other end of the positive dispersion flow channel 20 is communicated with one end of the positive collection flow channel 21 to form an electrolyte flow channel surrounding the positive electrode cavity 5, and the other end of the positive collection flow channel 21 is communicated with the second positive turning hole 7.

[0059] As Figure 2 and Figure 3 shown, the positive electrolyte flows through the positive electrolyte inlet 1, the first positive electrolyte tank 10, the first positive turning hole 6, the positive dispersion flow channel 20, the positive electrode cavity 5, the positive collection flow channel 21, the second positive turning hole 7, the second positive electrolyte tank 11, and the positive electrolyte outlet 3 in sequence.

[0060] As Figure 2 and Figure 3 shown, the negative electrolyte flows through the negative electrolyte inlet 2, the third negative electrolyte tank 18, the first negative turning hole 8, the negative dispersion flow channel 14, the negative electrode cavity 5, the negative collection flow channel 15, the second negative turning hole 9, the fourth negative electrolyte tank 19, and the negative electrolyte outlet 4 in sequence.

[0061] As Figure 3 shown, the third positive electrolyte tank 16 is located directly below the first positive electrolyte tank 10, one end of the third positive electrolyte tank 16 is communicated with the positive electrolyte inlet 1, and the other end is closed; the fourth positive electrolyte tank 17 is located directly below the second positive electrolyte tank 11, one end of the fourth positive electrolyte tank 17 is communicated with the positive electrolyte outlet 3, and the other end is closed.

[0062] Among them, the third positive electrode electrolyte tank 16 has the same structure as the second positive electrode electrolyte tank 11, and the fourth positive electrode electrolyte tank 17 has the same structure as the first positive electrode electrolyte tank 10.

[0063] As Figure 2 shown, one end of the first negative electrode electrolyte tank 12 is connected to the negative electrode electrolyte inlet 2, and the other end is closed. The third negative electrode electrolyte tank 18 is located below the first negative electrode electrolyte tank 12; one end of the second negative electrode electrolyte tank 13 is connected to the negative electrode electrolyte outlet 4, and the other end is closed. The fourth negative electrode electrolyte tank 19 is located below the second negative electrode electrolyte tank 13.

[0064] Among them, the first negative electrode electrolyte tank 12 has the same structure as the fourth negative electrode electrolyte tank 19, and the second negative electrode electrolyte tank 13 has the same structure as the third negative electrode electrolyte tank 18.

[0065] As Figure 4 shown, when stacking multiple plate frames of the present invention, the fourth positive electrode electrolyte tank 17 on the lower end surface of the upper plate frame and the first positive electrode electrolyte tank 10 on the upper end surface of the current plate frame are sealed to form a first positive electrode electrolyte flow channel, and the third positive electrode electrolyte tank 16 on the lower end surface of the upper plate frame and the second positive electrode electrolyte tank 11 on the upper end surface of the current plate frame are sealed to form a second positive electrode electrolyte flow channel.

[0066] The fourth negative electrode electrolyte tank 19 on the lower end surface of the upper plate frame and the first negative electrode electrolyte tank 12 on the upper end surface of the current plate frame are sealed to form a first negative electrode electrolyte flow channel, and the third negative electrode electrolyte tank 18 on the lower end surface of the upper plate frame and the second negative electrode electrolyte tank 13 on the upper end surface of the current plate frame are sealed to form a second negative electrode electrolyte flow channel.

[0067] Among them, the positive electrode electrolyte inlet 1, the first positive electrode electrolyte flow channel, the first positive electrode turning hole 6 of the current plate frame, the positive electrode dispersion flow channel 20 of the current plate frame, the positive electrode electrode cavity 5 of the current plate frame, the positive electrode collection flow channel 21 of the current plate frame, the second positive electrode turning hole 7 of the current plate frame, the second positive electrode electrolyte flow channel, and the positive electrode electrolyte outlet 3 are connected in sequence;

[0068] The negative electrode electrolyte inlet 2, the first negative electrode electrolyte flow channel, the first negative electrode turning hole 8 of the upper plate frame, the negative electrode dispersion flow channel 14 of the upper plate frame, the negative electrode electrode cavity 5 of the upper plate frame, the negative electrode collection flow channel 15 of the upper plate frame, the second positive electrode turning hole 7 of the upper plate frame, the second negative electrode electrolyte flow channel, and the negative electrode electrolyte outlet 4 are connected in sequence.

[0069] For example, the first positive electrolyte tank 10, the second positive electrolyte tank 11, the first negative electrolyte tank 12, the second negative electrolyte tank 13, the third positive electrolyte tank 16, the fourth positive electrolyte tank 17, the third negative electrolyte tank 18, and the fourth negative electrolyte tank 19 can be set in an L shape, or can be set in other shapes according to needs.

[0070] For example, the negative dispersion flow channel 14 communicates with the negative collection flow channel 15 to form a square electrolyte flow channel surrounding the negative electrode cavity 5; the positive dispersion flow channel 20 communicates with the positive collection flow channel 21 to form a square electrolyte flow channel surrounding the positive electrode cavity 5.

[0071] For example, when multiple plate frames are stacked, the cross-sectional shapes of the first positive electrolyte flow channel, the second positive electrolyte flow channel, the first negative electrolyte flow channel, and the second negative electrolyte flow channel formed by the upper plate frame and the current plate frame can be rectangular or trapezoidal. For example, when the plate frame is machined, the electrolyte flow channel can be set as rectangular for easy machining; when the plate frame is injection molded, the electrolyte flow channel can be set as trapezoidal.

[0072] In the flow battery plate frame with the horizontal flipping and mounting form of the present invention, electrolyte flow channels are opened on both end faces, enabling the plate frame to make full use of the area, reducing the areas with relatively thick thickness. During injection molding production, the shrinkage defects are reduced, the deformation of the plate frame is reduced, and the product reliability is improved. The area utilization rate is increased, the materials used are reduced, and thus the material cost is also reduced.

[0073] Based on the above-mentioned flow battery plate frame with the horizontal flipping and mounting form, the present invention further provides a flow single cell, including the above-mentioned plate frame, membrane, positive electrode, negative electrode, and bipolar plate.

[0074] Wherein, the membrane is arranged in the electrode cavity 5 of the plate frame. The membrane divides the electrode cavity 5 of the plate frame to form a negative electrode cavity 5 on the upper end face and a positive electrode cavity 5 on the lower end face. The negative electrode is arranged in the negative electrode cavity 5, the positive electrode is located in the positive electrode cavity 5, and the bipolar plate is stacked above the negative electrode.

[0075] The present invention further provides a flow battery stack, including a plurality of the above-mentioned single cells. When the plurality of single cells are stacked, the single cell above the current single cell is horizontally rotated 180 degrees for stacked installation.

[0076] In order to make the flow channels sealable in the present invention, and in cooperation with the double-sided flow channels, adjacent two groups of single cells can be horizontally rotated 180 degrees for stacked installation.

[0077] While reducing the cost, the single cell of the present invention can also reduce the volume of the overall battery stack, indirectly reducing the floor area of the entire battery system.

[0078] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid flow battery plate frame in a horizontal flip installation form, characterized in that: It includes a positive electrode electrolyte inlet, a negative electrode electrolyte inlet, a positive electrode electrolyte outlet, a negative electrode electrolyte outlet and an electrode cavity, wherein the electrode cavity is divided by a membrane to form a negative electrode cavity and a positive electrode cavity; The electrode cavity is located at the center of the plate frame, and a first positive electrode flip hole, a second positive electrode flip hole, a first negative electrode flip hole and a second negative electrode flip hole are also provided on both sides of the electrode cavity and meet the following conditions: after the plate frame is horizontally rotated 180°, the second positive electrode flip hole coincides with the first positive electrode flip hole, and the second negative electrode flip hole coincides with the first negative electrode flip hole; The upper and lower end surfaces of the plate frame are both provided with electrolyte tanks and meet the following conditions: the electrolyte tank on the lower end surface of the plate frame is horizontally rotated 180° to overlap with the electrolyte tank on the upper end surface of the plate frame; When a plurality of the plate frames are stacked, the upper plate frame above the current plate frame is horizontally rotated 180° and aligned with the current plate frame, so that the electrolyte tank on the upper end surface of the current plate frame and the electrolyte tank on the lower end surface of the upper plate frame form a positive electrode electrolyte flow channel and a negative electrode electrolyte channel; Among them, the positive electrode electrolyte flow channel is connected with the two positive electrode flip holes, the positive electrode cavity, the positive electrode electrolyte inlet, and the positive electrode electrolyte outlet of the current plate frame; the negative electrode electrolyte channel is connected with the two negative electrode flip holes, the negative electrode cavity, the negative electrode electrolyte inlet and the negative electrolyte outlet of the upper plate frame.

2. The horizontal flip installation type flow battery plate frame according to claim 1 is characterized in that: The plate frame is square, and the positive electrode electrolyte inlet, the negative electrode electrolyte inlet, the positive electrode electrolyte outlet and the negative electrode electrolyte outlet are respectively arranged at the four corners of the plate frame.

3. The horizontal flip installation type flow battery plate frame according to claim 2 is characterized in that: The positive electrolyte inlet and the positive electrolyte outlet are arranged along the diagonal of the plate frame, the negative electrolyte inlet and the negative electrolyte outlet are arranged along the diagonal of the plate frame, and the positive electrolyte inlet and the negative electrolyte inlet are respectively located at both ends of the long side of the plate frame.

4. The horizontal flip installation type flow battery plate frame according to claim 1 is characterized in that: The upper end surface of the plate frame is provided with a first positive electrode electrolyte tank, a second positive electrode electrolyte tank, a first negative electrode electrolyte tank, a second negative electrode electrolyte tank, a negative electrode dispersion flow channel and a negative electrode collection flow channel; The plate frame is provided with a third positive electrode electrolyte tank, a fourth positive electrode electrolyte tank, a third negative electrode electrolyte tank, a fourth negative electrode electrolyte tank, a positive electrode dispersion flow channel and a positive electrode collection flow channel on the lower end surface opposite to the upper end surface; The positive electrode electrolyte flows sequentially through the positive electrode electrolyte inlet, the first positive electrode electrolyte tank, the first positive electrode reversal hole, the positive electrode dispersion flow channel, the positive electrode cavity, the positive electrode collection flow channel, the second positive electrode reversal hole, the second positive electrode electrolyte tank and the positive electrode electrolyte outlet; The negative electrode electrolyte flows sequentially through the negative electrode electrolyte inlet, the third negative electrode electrolyte tank, the first negative electrode reversal hole, the negative electrode dispersion flow channel, the negative electrode cavity, the negative electrode collection flow channel, the second negative electrode reversal hole, the fourth negative electrode electrolyte tank and the negative electrode electrolyte outlet.

5. The horizontal flip installation type flow battery plate frame according to claim 4 is characterized in that: The third positive electrolyte tank is located directly below the first positive electrolyte tank, one end of the third positive electrolyte tank is connected to the positive electrolyte inlet, and the other end is closed; the fourth positive electrolyte tank is located directly below the second positive electrolyte tank, one end of the fourth positive electrolyte tank is connected to the positive electrolyte outlet, and the other end is closed; The third positive electrode electrolyte tank has the same structure as the second positive electrode electrolyte tank, and the fourth positive electrode electrolyte tank has the same structure as the first positive electrode electrolyte tank.

6. The horizontal flip installation type flow battery plate frame according to claim 5 is characterized in that: One end of the first negative electrode electrolyte tank is connected to the negative electrode electrolyte inlet, and the other end is closed, and the third negative electrode electrolyte tank is located below the first negative electrode electrolyte tank; one end of the second negative electrode electrolyte tank is connected to the negative electrode electrolyte outlet, and the other end is closed, and the fourth negative electrode electrolyte tank is located below the second negative electrode electrolyte tank; The first negative electrode electrolyte tank has the same structure as the fourth negative electrode electrolyte tank, and the second negative electrode electrolyte tank has the same structure as the third negative electrode electrolyte tank.

7. The horizontal flip installation type flow battery plate frame according to claim 6 is characterized in that: When multiple plate frames are stacked, the fourth positive electrode electrolyte tank on the lower end surface of the upper plate frame is sealed with the first positive electrode electrolyte tank on the upper end surface of the current plate frame to form a first positive electrode electrolyte flow channel, and the third positive electrode electrolyte tank on the lower end surface of the upper plate frame is sealed with the second positive electrode electrolyte tank on the upper end surface of the current plate frame to form a second positive electrode electrolyte flow channel; The fourth negative electrode electrolyte tank on the lower end surface of the upper plate frame is sealed with the first negative electrode electrolyte tank on the upper end surface of the current plate frame to form a first negative electrode electrolyte flow channel, and the third negative electrode electrolyte tank on the lower end surface of the upper plate frame is sealed with the second negative electrode electrolyte tank on the upper end surface of the current plate frame to form a second negative electrode electrolyte flow channel.

8. The horizontal flip installation type flow battery plate frame according to claim 7 is characterized in that: The positive electrode electrolyte inlet, the first positive electrode electrolyte flow channel, the first positive electrode reversing hole of the current plate frame, the positive electrode dispersion flow channel of the current plate frame, the positive electrode cavity of the current plate frame, the positive electrode collection flow channel of the current plate frame, the second positive electrode reversing hole of the current plate frame, the second positive electrode electrolyte flow channel, and the positive electrode electrolyte outlet are connected in sequence; The negative electrode electrolyte inlet, the first negative electrode electrolyte flow channel, the first negative electrode reversal hole of the upper plate frame, the negative electrode dispersion flow channel of the upper plate frame, the negative electrode cavity of the upper plate frame, the negative electrode collection flow channel of the upper plate frame, the second positive electrode reversal hole of the upper plate frame, the second negative electrode electrolyte flow channel, and the negative electrode electrolyte outlet are connected in sequence.

9. A liquid flow cell, characterized in that: A flow battery plate frame, a membrane, a positive electrode, a negative electrode and a bipolar plate in a horizontally flipped installation form as described in any one of claims 1 to 8; Among them, the membrane is arranged in the electrode cavity of the plate frame, and the membrane divides the electrode cavity of the plate frame into a negative electrode cavity at the upper end face and a positive electrode cavity at the lower end face. The negative electrode is arranged in the negative electrode cavity, the positive electrode is located in the positive electrode cavity, and the bipolar plate is stacked above the negative electrode.

10. A liquid flow battery stack, characterized in that: Comprising a plurality of liquid flow cells as described in claim 9, when the plurality of cells are stacked, the cell above the current cell is horizontally rotated 180 degrees for stacking and installation.

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