Cover plate for flow battery capable of efficiently injecting liquid

Abstract

The utility model relates to the technical field of flow batteries, and discloses a cover plate for a flow battery capable of efficiently injecting liquid. The efficient liquid injection type cover plate for the flow battery comprises a plate frame main body and a cover plate main body, a rectangular stepped hole is formed in the center of the plate frame main body, flow channel grooves distributed in a central symmetry mode are formed in the surface of the plate frame main body, and the cover plate main body is matched with the rectangular stepped hole; the device has the advantages that the electrolyte enters and exits from the front side, the rear side, the left side and the right side of the galvanic pile, so that the speed of the electrolyte entering and exiting the galvanic pile is improved, the working efficiency of the galvanic pile is further improved, and the problem that the electrolyte entering the galvanic pile is shunted by arranging shunting bodies which are linearly arranged and symmetrically distributed front and back on a cover plate is solved. The electrolyte only passes through the front side and the rear side of the galvanic pile, so that the speed of the electrolyte entering and exiting the galvanic pile is reduced, and the working efficiency of the galvanic pile is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid flow batteries, in particular to a cover plate for a liquid flow battery with high efficiency liquid injection. Background Art

[0002] The cover plate of a flow battery is a key component that plays a vital role in the flow battery system. This cover plate is usually designed with a fine flow channel structure to control the inflow and outflow of the electrolyte solution, ensuring the battery's charge and discharge efficiency.

[0003] For example, publication number CN111446465A proposes an integrated plate frame and battery stack for a liquid flow battery. The integrated plate frame includes a battery plate frame body, a battery plate frame cover, and a bipolar plate. The upper side of the battery plate frame body is provided with a stepped slot. The battery plate frame cover snaps the bipolar plate onto the stepped surface of the slot. The periphery of the battery plate frame cover cooperates with the slot contour to form a complete plane. A connecting structure is provided between the bipolar plate and the battery plate frame body and the battery plate frame cover. The battery plate frame cover is provided with a branch channel for the electrolyte to pass through, and the branch channel is connected to the main channel of the battery plate frame body. The integrated plate frame of the liquid flow battery of the present invention and the battery stack made using the same solve the problems of leakage, dislocation, and distortion during the assembly and manufacturing of the battery plate frame, reduce costs, and improve the reliability of the battery plate frame.

[0004] The above patent diverts the electrolyte entering the battery stack by providing diverter bodies arranged in a line and symmetrically distributed front to back on the cover plate. However, the electrolyte enters and exits the battery stack only through the front and rear sides of the battery stack, which leads to a decrease in the rate at which the electrolyte enters and exits the battery stack, thereby affecting the working efficiency of the battery stack. Therefore, a cover plate for a liquid flow battery with high efficiency injection is proposed to solve the above problem. Utility Model Content

[0005] (1) Technical problems solved

[0006] In response to the shortcomings of the existing technology, the utility model provides a cover plate for liquid flow batteries with high-efficiency liquid injection, which has the advantages of allowing electrolyte to enter and exit from the front, back, left and right sides of the battery stack, thereby increasing the rate at which the electrolyte enters and exits the battery stack, thereby further improving the working efficiency of the battery stack. It solves the problem of diverting the electrolyte entering the battery stack by arranging diverter bodies arranged in a line and symmetrically distributed front to back on the cover plate, but the electrolyte enters and exits the battery stack only through the front and rear sides of the battery stack, which leads to a decrease in the rate at which the electrolyte enters and exits the battery stack, thereby affecting the working efficiency of the battery stack.

[0007] (2) Technical solution

[0008] The technical solution of the utility model for solving the above-mentioned technical problems is as follows: A cover plate for a liquid flow battery with high efficiency injection, comprising a plate frame body and a cover plate body, a rectangular stepped hole is provided in the center of the plate frame body, flow channel grooves are provided on the surface of the plate frame body and are symmetrically distributed in the center, the cover plate body is adapted to the rectangular stepped hole, a rectangular embedded hole adapted to both the rectangular stepped hole and the electrode plate is provided in the center of the cover plate body, diffusion grooves are provided on the surface of the cover plate body and are symmetrically distributed in the front and back, the opposite sides of the diffusion grooves are connected to the rectangular embedded holes, the opposite sides of the diffusion grooves are respectively adapted to the flow channel grooves, the bottoms of the diffusion grooves are provided with flow balancing components which are symmetrically distributed on the left and right and adapted to the rectangular embedded holes, and the bottoms of the diffusion grooves are fixedly connected to diversion blocks located between the flow balancing components and adapted to the opposite sides of the diffusion grooves.

[0009] The beneficial effects of the utility model are:

[0010] The cover plate for the high-efficiency liquid-injected liquid flow battery has an electrolyte that flows into the diffusion groove on the front side through the flow channel groove on the front side, and is then diverted by the diversion block on the front side in the diffusion groove and directed to both sides thereof. The electrolyte thus flows to both sides along the equalizing flow components on both sides, and at the same time flows into the battery stack in the rectangular embedded hole through the equalizing flow components, and flows out into the flow channel groove on the rear side through the diffusion groove on the rear side. The electrolyte flows in from the front and left and right sides of the battery stack, and then flows out through the rear and left and right sides of the battery stack. It has the advantages of electrolyte inflow and outflow from the front, back, left and right sides of the battery stack, thereby increasing the rate at which the electrolyte enters and exits the battery stack, thereby further improving the working efficiency of the battery stack.

[0011] On the basis of the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, the flow balancing assembly includes a guide block and a bend transition block. The bottom of the diffusion groove is fixedly connected with a guide block that is symmetrically distributed on the left and right and located at the edge of the rectangular embedded hole. The guide blocks are distributed at equal distances. The bottom of the diffusion groove is fixedly connected with a bend transition block located at the right angle of the rectangular embedded hole.

[0013] Furthermore, the bottom of each diffusion trough is fixedly connected with a diverter block located on the opposite side of the diffusion trough and in communication with the outer side thereof, and the diverter block is located between the guide blocks near the center;

[0014] Furthermore, the tops of the guide blocks, the corner transition blocks and the diverter blocks are all flush with the top surface of the plate frame body.

[0015] The beneficial effect of adopting the above-mentioned further scheme is that the electrolyte flows into the diffusion groove on the front side through the flow channel groove on the front side, and is then diverted by the diversion block on the front side in the diffusion groove and directed to both sides thereof. The electrolyte thus flows to both sides along the guide blocks on both sides, and is smoothly guided to the diffusion grooves on the left and right sides of the battery stack through the bend transition blocks. At the same time, it flows into the battery stack in the rectangular embedded hole through the gap between the guide blocks, and flows out to the flow channel groove on the rear side through the diffusion groove on the rear side. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the main structure of the plate frame of the utility model;

[0018] Figure 3 This is a schematic diagram of the main structure of the cover plate of the utility model.

[0019] In the figure: 1. Plate frame body; 2. Cover plate body; 3. Rectangular stepped hole; 4. Flow channel groove; 5. Rectangular embedded hole; 6. Diffusion groove; 7. Flow balancing assembly; 701. Guide block; 702. Corner transition block; 8. Diverter block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In the embodiment, Figure 1-3 A cover plate for a liquid flow battery with high efficiency injection is provided. The utility model comprises a plate frame body 1 and a cover plate body 2. A rectangular stepped hole 3 is provided in the center of the plate frame body 1. A flow channel 4 with a central symmetrical distribution is provided on the surface of the plate frame body 1. The cover plate body 2 is adapted to the rectangular stepped hole 3. A rectangular embedded hole 5 adapted to both the rectangular stepped hole 3 and the electrode plate is provided in the center of the cover plate body 2. Diffusion grooves 6 with a front-to-back symmetrical distribution are provided on the surface of the cover plate body 2. The opposite sides of the diffusion grooves 6 are connected to the rectangular embedded holes 5, and the opposite sides of the diffusion grooves 6 are respectively adapted to the flow channel 4. The bottoms of the diffusion grooves 6 are provided with flow balancing components 7 with a left-right symmetrical distribution and adapted to the rectangular embedded holes 5. The bottoms of the diffusion grooves 6 are fixedly connected with diverter blocks 8 located between the flow balancing components 7 and adapted to the opposite sides of the diffusion grooves 6.

[0022] The flow balancing component 7 includes a guide block 701 and a bend transition block 702. The bottom of the diffusion groove 6 is fixedly connected with the guide blocks 701 that are symmetrically distributed on the left and right and located at the edge of the rectangular embedded hole 5. The guide blocks 701 are distributed at equal distances. The bottom of the diffusion groove 6 is fixedly connected with the bend transition block 702 located at the right angle of the rectangular embedded hole 5.

[0023] The bottom of the diffusion groove 6 is fixedly connected with a diverter block 8 located on the opposite side of the diffusion groove 6 and in communication with the outside thereof. The diverter block 8 is located between the guide blocks 701 near the center.

[0024] The tops of the guide block 701, the corner transition block 702 and the diverter block 8 are all flush with the top surface of the plate frame body 1;

[0025] The electrolyte flows into the diffusion groove 6 on the front side through the flow channel 4 on the front side, and is then diverted by the diversion block 8 on the front side in the diffusion groove 6 and directed to both sides thereof. The electrolyte thus flows to both sides along the guide blocks 701 on both sides, and is smoothly guided to the diffusion grooves 6 on the left and right sides of the battery stack through the bend transition block 702. At the same time, it flows into the battery stack in the rectangular embedded hole 5 through the gap between the guide blocks 701, and flows out to the flow channel 4 on the rear side through the diffusion groove 6 on the rear side.

[0026] Working principle:

[0027] Step 1: The electrolyte flows through the front flow channel 4 into the front diffusion tank 6, and is then diverted by the front diversion block 8 in the diffusion tank 6 and directed to both sides thereof;

[0028] Step 2: The electrolyte flows along the guide blocks 701 on both sides and smoothly flows through the bend transition blocks 702 to the diffusion slots 6 on the left and right sides of the stack. At the same time, the electrolyte flows through the gaps between the guide blocks 701 and into the stack in the rectangular embedded hole 5.

[0029] Step 3: The electrolyte flows out through the diffusion groove 6 on the rear side into the flow channel groove 4 on the rear side. The electrolyte flows in from the front and left and right sides of the fuel cell stack, and then flows out through the rear and left and right sides of the fuel cell stack. The electrolyte can flow in and out from the front, back, left and right sides of the fuel cell stack, thereby increasing the rate of electrolyte entering and exiting the fuel cell stack, thereby further improving the working efficiency of the fuel cell stack.

[0030] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cover plate for a high-efficiency liquid-injection flow battery, comprising a plate frame body (1) and a cover plate body (2), wherein a rectangular stepped hole (3) is provided in the center of the plate frame body (1), and flow channel grooves (4) are provided on the surface of the plate frame body (1) in a centrally symmetrical distribution, characterized in that: The cover plate body (2) is adapted to the rectangular stepped hole (3); a rectangular embedded hole (5) adapted to both the rectangular stepped hole (3) and the electrode plate is provided at the center of the cover plate body (2); diffusion grooves (6) symmetrically distributed front and back are provided on the surface of the cover plate body (2); opposite sides of the diffusion grooves (6) are communicated with the rectangular embedded hole (5); opposite sides of the diffusion grooves (6) are adapted to the flow channel grooves (4); the bottoms of the diffusion grooves (6) are provided with flow balancing components (7) symmetrically distributed left and right and adapted to the rectangular embedded hole (5); the bottoms of the diffusion grooves (6) are fixedly connected with diverter blocks (8) located between the flow balancing components (7) and adapted to the opposite sides of the diffusion grooves (6).

2. The cover plate for a high-efficiency liquid injection flow battery according to claim 1, characterized in that: The flow balancing assembly (7) comprises a flow guide block (701) and a bend transition block (702); the bottom of each diffusion groove (6) is fixedly connected to the flow guide blocks (701) which are symmetrically distributed on the left and right and located at the edge of the rectangular embedded hole (5); the flow guide blocks (701) are distributed at equal distances; and the bottom of each diffusion groove (6) is fixedly connected to the bend transition block (702) located at a right angle of the rectangular embedded hole (5).

3. The cover plate for a high-efficiency liquid injection flow battery according to claim 2, characterized in that: The bottom of each diffusion groove (6) is fixedly connected to a diversion block (8) located on the opposite side of the diffusion groove (6) and in communication with the outside thereof. The diversion block (8) is located between the guide blocks (701) near the center.

4. The cover plate for a high-efficiency liquid injection flow battery according to claim 3, characterized in that: The tops of the guide block (701), the corner transition block (702) and the diverter block (8) are all flush with the top surface of the plate frame body (1).

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