Multi-cavity flow battery guide plate

Abstract

The utility model discloses a multi-chamber flow battery guide plate which comprises a plate body, a plurality of reaction chambers are arranged on the plate body, the adjacent reaction chambers are arranged at intervals through partition columns, one side of each reaction chamber is provided with a positive electrode liquid inlet hole and a negative electrode liquid inlet hole, and the other side of each reaction chamber is provided with a positive electrode liquid outlet hole and a negative electrode liquid outlet hole; a liquid storage tank is arranged on the outer side wall of the reaction chamber and is communicated with the reaction chamber through a permeation channel; diversion trenches are formed in two sides of the reaction chamber, one end of each diversion trench is communicated with the positive liquid inlet hole or the positive liquid outlet hole, and the other end of each diversion trench is communicated with the liquid storage tank. According to the guide plate disclosed by the utility model, a plurality of independent electrolyte reaction chambers are arranged, so that the problem that the flow field of the electrolyte in the guide plate is not uniform under the condition of large reaction area is effectively solved, the defects caused by large ion concentration difference of the electrolyte at different parts of the reaction chambers are reduced, and the working efficiency and the service life of the battery are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid flow batteries, in particular to a multi-chamber liquid flow battery guide plate. Background Art

[0002] Liquid flow battery is a new type of high-efficiency electric energy conversion and storage device. Since its battery output power and energy storage capacity are independent of each other, it is suitable for use as a large-scale energy storage device in the process of renewable energy power generation such as wind and solar energy and the process of grid peak regulation. Liquid flow battery is a new type of electrochemical energy storage system. Liquid flow battery is mostly used in the form of battery stacks when in use, and often requires a guide plate to guide the electrolyte. However, the distance between the liquid inlet and outlet holes on the current guide plate is far, and the flow field area of ​​the reaction chamber is large, resulting in a large difference in electrolyte ion concentration in different parts during the charge and discharge process, thereby increasing the polarization resistance, affecting the battery's working efficiency, and even shortening the battery's service life. Utility Model Content

[0003] The utility model provides a multi-chamber flow battery guide plate, which solves the problem caused by the large flow field area of ​​the reaction chamber.

[0004] A multi-chamber flow battery guide plate comprises a plate body, a plurality of reaction chambers are arranged on the plate body, adjacent reaction chambers are arranged by spacers, a positive electrode liquid inlet hole and a negative electrode liquid inlet hole are arranged on one side of the reaction chamber, and a positive electrode liquid outlet hole and a negative electrode liquid outlet hole are arranged on the other side;

[0005] A liquid storage tank is provided on the outer wall of the reaction chamber, and the liquid storage tank is connected with the reaction chamber through a permeation channel;

[0006] Guide grooves are arranged on both sides of the reaction chamber, one end of the guide groove is connected to the positive electrode liquid inlet or the positive electrode liquid outlet, and the other end is connected to the liquid storage tank.

[0007] The beneficial effects of adopting the above technical solution are as follows: the guide plate of the utility model divides the large-area reaction chamber into multiple independent small reaction chambers, and each small reaction chamber is separately introduced with electrolyte, which is used to reduce the migration distance of ions in the electrolyte, while also avoiding the problems caused by the difference in electrolyte ion concentration; in addition, a liquid storage tank, a guide tank and an infiltration channel are also provided on the guide plate, which can greatly avoid the situation where the ion concentration in different parts of the reaction chamber is greatly different by cooperating with each other.

[0008] Furthermore, a diverter block is provided in the guide groove, and the diverter block divides the liquid storage tank into two left and right parts.

[0009] The beneficial effect of adopting the above technical solution is that the electrolyte can be transported to each independent reaction chamber in equal amounts at the same time through the diverter block.

[0010] Furthermore, the top surface of the above-mentioned permeation channel is higher than the bottom wall of the liquid storage tank and lower than the ridges on both sides.

[0011] The beneficial effect of adopting the above technical solution: the setting of the permeation channel is conducive to the electrolyte flowing into the reaction chamber only after it accumulates to a certain height in the liquid storage tank, thereby preventing the problem of different times for the electrolyte to enter the reaction chamber caused by deformation of the plate body.

[0012] Furthermore, the smoothness of the surface of the plate is not greater than 20 μm.

[0013] Furthermore, the cross-sectional shape of the guide groove is any one of a rectangular, semicircular, U-shaped, and a dovetail groove.

[0014] Furthermore, the reaction chamber comprises a first reaction chamber and a second reaction chamber, and the first reaction chamber and the second reaction chamber are symmetrically arranged on the plate.

[0015] Furthermore, an anti-reverse installation mark is provided on the side wall of the plate body.

[0016] The beneficial effects of adopting the above technical solution are as follows: the anti-reverse installation mark can ensure that the assembler assembles correctly at one time, thereby reducing production costs.

[0017] The utility model has the following beneficial effects: the guide plate of the utility model effectively solves the problem of uneven flow field of the electrolyte in the guide plate when the reaction area is large by setting up multiple independent electrolyte reaction chambers, reduces the defects caused by large difference in electrolyte ion concentration in different parts of the reaction chamber, and greatly improves the working efficiency and service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view schematic diagram of the guide plate of the utility model.

[0019] In the figure: 10-plate; 101-partition column; 102-guide groove; 103-diverter block; 104-liquid storage tank; 105-permeation channel; 106-positive electrode liquid inlet hole; 107-negative electrode liquid inlet hole; 108-positive electrode liquid outlet hole; 109-negative electrode liquid outlet hole; 201-first reaction chamber; 202-second reaction chamber. DETAILED DESCRIPTION

[0020] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0021] refer to Figure 1The utility model provides a multi-chamber flow battery guide plate, comprising: a plate body 10, the plate body 10 is a rectangular plate structure, and a plurality of reaction chambers are arranged in the middle thereof, and the reaction chambers provide a reaction place for the electrolyte reaction. In this embodiment, two independent reaction chambers, a first reaction chamber 201 and a second reaction chamber 202, are arranged. The first reaction chamber 201 and the second reaction chamber 202 are symmetrically arranged at both ends of the plate body 10 and are spaced apart by a spacer 101; the arrangement of multiple reaction chambers can effectively solve the problem of uneven flow field of the electrolyte in the guide plate when the reaction area is large.

[0022] A positive electrode liquid inlet hole 106, a negative electrode liquid inlet hole 107, a positive electrode liquid outlet hole 108, and a negative electrode liquid outlet hole 109 are respectively arranged on both sides of the long side of the reaction chamber. The positive electrode liquid inlet hole 106 is used to inject positive electrolyte, the negative electrode liquid inlet hole 107 is used to inject negative electrolyte, the positive electrode liquid outlet hole 108 is used to receive and discharge the positive electrolyte in the reaction chamber, and the negative electrode liquid outlet hole 109 is used to receive and discharge the negative electrolyte in the reaction chamber.

[0023] A liquid storage tank 104 is provided on the outer wall of the reaction chamber, and the liquid storage tank 104 is connected to the reaction chamber through a permeation channel 105. The top surface of the permeation channel 105 is higher than the bottom wall of the liquid storage tank 104 and lower than the convex edges on both sides; the liquid storage tank 104 is used to store electrolyte, and the electrolyte in the liquid storage tank 104 flows into the reaction chamber from the permeation channel 105 after it is filled, so as to avoid uneven electrolyte concentration in different parts of the reaction chamber.

[0024] The reaction chamber is provided with flow guide grooves 102 on both sides, one end of which is connected to the positive electrode liquid inlet 106 or the positive electrode liquid outlet 108, and the other end is connected to the liquid storage tank 104. The cross-sectional shape of the flow guide groove 102 is any one of rectangular, semicircular, U-shaped, and dovetail groove.

[0025] A diverter block 103 is provided in the guide groove 102, and the diverter block 103 divides the liquid storage tank 104 and the guide groove 102 itself into two parts, left and right, so that the electrolyte can be injected into both sides independently.

[0026] In order to prevent the board body 10 from being installed upside down during assembly or packaging, an anti-reverse installation mark is provided on the side wall of the board body 10. The anti-reverse installation mark is a small protrusion.

[0027] At the same time, the surface finish of the plate body 10 is required to be no greater than 20μm, there should be no impurities and air bubbles inside the plate body 10, there should be no burrs or scratches on the edges, there should be no bending as a whole, the size should remain stable, and the finished product should eliminate residual stress.

[0028] The positive electrode liquid inlet 106 is used to inject the positive electrolyte, and the negative electrode liquid inlet 107 is used to inject the negative electrolyte.

[0029] The above is only a preferred embodiment of the utility model, which does not represent all possible forms of the utility model, and the protection scope of the utility model is not limited to such special statements and embodiments. According to the technical inspirations disclosed by the utility model, various other modifications and improvements that do not deviate from the essence of the utility model are made, and these modifications and improvements are still within the protection scope of the utility model.

Claims

1. A multi-chamber flow battery guide plate, comprising a plate body (10), characterized in that: A plurality of reaction chambers are arranged on the plate body (10), and adjacent reaction chambers are arranged at intervals by spacers (101); a positive electrode liquid inlet hole (106) and a negative electrode liquid inlet hole (107) are arranged on one side of the reaction chamber, and a positive electrode liquid outlet hole (108) and a negative electrode liquid outlet hole (109) are arranged on the other side; A liquid storage tank (104) is provided on the outer wall of the reaction chamber, and the liquid storage tank (104) is connected to the reaction chamber through a permeation channel (105); Guide grooves (102) are arranged on both sides of the reaction chamber, one end of the guide groove (102) is connected to the positive electrode liquid inlet hole (106) or the positive electrode liquid outlet hole (108), and the other end is connected to the liquid storage tank (104).

2. The multi-chamber flow battery guide plate according to claim 1, characterized in that: A diverter block (103) is provided in the guide groove (102), and the diverter block (103) divides the liquid storage tank (104) into two parts, a left part and a right part.

3. The multi-chamber flow battery guide plate according to claim 1, characterized in that: The top surface of the permeation channel (105) is higher than the bottom wall of the liquid storage tank (104) and lower than the ridges on both sides.

4. The multi-chamber flow battery guide plate according to claim 1, characterized in that: The surface finish of the plate body (10) is no greater than 20 μm.

5. The multi-chamber flow battery guide plate according to claim 1, characterized in that: The cross-sectional shape of the guide groove (102) is any one of a rectangular shape, a semicircular shape, a U shape, and a dovetail groove shape.

6. The multi-chamber flow battery guide plate according to claim 1, characterized in that: The reaction chamber comprises a first reaction chamber (201) and a second reaction chamber (202), and the first reaction chamber (201) and the second reaction chamber (202) are symmetrically arranged on the plate body (10).

7. The multi-chamber flow battery guide plate according to any one of claims 1 to 6, characterized in that: An anti-reverse installation mark is provided on the side wall of the plate body (10).

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