CN109428093B

CN109428093B - Liquid flow frame and electric pile comprising same

Info

Publication number: CN109428093B
Application number: CN201710720584.3A
Authority: CN
Inventors: 汪保国; 杨霖霖; 廖文俊
Original assignee: Shanghai Electric Group Corp
Current assignee: Shanghai Electric Anhui Energy Storage Technology Co ltd
Priority date: 2017-08-21
Filing date: 2017-08-21
Publication date: 2021-07-30
Anticipated expiration: 2037-08-21
Also published as: CN109428093A

Abstract

The invention discloses a liquid flow frame and a galvanic pile comprising the same. The liquid flow frame is provided with an outer sealing line and an inner sealing line, a flow guide groove and a flow guide hole are arranged between the outer sealing line and the inner sealing line, and the flow guide groove is communicated with the flow guide hole. The electric pile comprises: a plurality of liquid flow frames and two business turn over liquid boards as above, a plurality of liquid flow frames are located between two business turn over liquid boards. According to the liquid flow frame, the diversion trench is arranged between the inner sealing line and the outer sealing line, and electrolyte leaked from the inner sealing line to the space between the inner sealing line and the outer sealing line is decompressed, so that the risk that the electrolyte leaks to the outside of the electric pile is reduced. The galvanic pile can effectively reduce the risk of electrolyte leakage.

Description

Liquid flow frame and electric pile comprising same

Technical Field

The invention relates to a liquid flow frame and a galvanic pile comprising the same.

Background

The all-vanadium redox flow battery pile structure is formed by alternately overlapping all key materials, and all the key materials are embedded into corresponding flow frames, so that the problems of internal sealing between the key materials and the flow frames and external sealing between the flow frames must be solved. The inner seal can affect the coulomb efficiency of the vanadium battery system, and the outer seal can cause the reliability problem of the operation of the vanadium battery system. The main focus on solving the internal and external sealing problem is on how to use a sealing wire or a sealing gasket, and the method has certain effect but also has the problem of leakage of the galvanic pile.

The leakage inside and outside the galvanic pile is solved only by sealing material plugging, the reliability of the galvanic pile becomes lower along with the increase of the service life and the change of the cold and hot alternation of the service temperature, and when the pressure of the fluid in the system is equal to the pressure of the liquid blocked by the sealing line, the risk of the leakage outside the galvanic pile is increased.

Disclosure of Invention

The invention aims to overcome the defect of leakage of a galvanic pile in the prior art, and provides a liquid flow frame for reducing the risk of leakage of the galvanic pile and the galvanic pile comprising the liquid flow frame.

The invention solves the technical problems through the following technical scheme:

a flow frame is provided with an outer sealing line and an inner sealing line, wherein a flow guide groove and a flow guide hole are arranged between the outer sealing line and the inner sealing line, and the flow guide groove is communicated with the flow guide hole.

Preferably, the flow guide groove is annular.

Preferably, the diversion hole is arranged in the diversion trench.

Preferably, the liquid flow frame is provided with two flow guiding holes, the two flow guiding holes are respectively a first flow guiding hole and a second flow guiding hole, an annular mounting groove is arranged in the first flow guiding hole, and the annular mounting groove is used for mounting the sealing element.

Preferably, the bottom surface of the first diversion hole is provided with two mutually-nested convex rings, an annular mounting groove is formed between the two convex rings, and the convex ring positioned on the outer layer is spaced from the side wall of the first diversion hole.

An electrical stack, comprising: a plurality of liquid flow frames and two business turn over liquid boards as above, a plurality of liquid flow frames are located between two business turn over liquid boards.

Preferably, the liquid inlet and outlet plate is provided with a guide groove, a guide hole and a liquid outlet, the positions of the guide groove and the guide hole correspond to the positions of the guide groove and the guide hole respectively, the liquid outlet leads to the outside of the electric pile, and the liquid outlet is communicated with the guide groove.

Preferably, the liquid outlet is arranged on the side surface of the liquid inlet and outlet plate.

Preferably, the stack further comprises two end plates, which clamp the inlet and outlet plates between the two end plates.

The positive progress effects of the invention are as follows: according to the liquid flow frame, the diversion trench is arranged between the inner sealing line and the outer sealing line, and electrolyte leaked from the inner sealing line to the space between the inner sealing line and the outer sealing line is decompressed, so that the risk that the electrolyte leaks to the outside of the electric pile is reduced. The galvanic pile can effectively reduce the risk of electrolyte leakage.

Drawings

Fig. 1 is a front view schematically illustrating a flow frame according to a preferred embodiment of the present invention.

Fig. 2 is an enlarged schematic view of a portion a of fig. 1.

Fig. 3 is an enlarged schematic structural view of a portion B of fig. 1.

Fig. 4 is a schematic cross-sectional structure view of a portion a of fig. 1.

Fig. 5 is a schematic perspective view of a stack according to a preferred embodiment of the present invention.

FIG. 6 is a schematic structural diagram of a liquid inlet and outlet plate according to a preferred embodiment of the present invention.

Description of reference numerals:

flow frame 10

Outer seal line 11

Inner seal line 12

Guiding gutter 13

First flow guide hole 14

Second flow guide hole 15

Annular mounting groove 16

Convex ring 17

Electric pile 20

Liquid inlet and outlet plate 21

Guide groove 211

First guide hole 212

Second guide hole 213

Liquid outlet 214

End plate 22

Detailed Description

The present invention is further illustrated by way of example and not by way of limitation in the scope of the described embodiments in connection with the accompanying drawings.

As shown in fig. 1-3, the flow frame 10 is provided with an outer seal line 11 and an inner seal line 12. The outer seal line 11 and the inner seal line 12 form a double seal for preventing an electrolyte in the below-described stack 20 from leaking to the outside of the stack 20.

A diversion trench 13 and a diversion hole are arranged between the outer sealing line 11 and the inner sealing line 12, and the diversion trench 13 is communicated with the diversion hole. The guiding gutter 13 is annular.

The diversion holes are arranged in the diversion trench 13. The liquid flow frame 10 is provided with two flow guiding holes, the two flow guiding holes are respectively a first flow guiding hole 14 and a second flow guiding hole 15, an annular mounting groove 16 is arranged in the first flow guiding hole 14, and the annular mounting groove 16 is used for mounting a sealing element.

As shown in fig. 4, the bottom surface of the first diversion hole 14 is provided with two mutually nested convex rings 17, an annular installation groove 16 is formed between the two convex rings 17, and the convex ring 17 positioned on the outer layer is spaced from the side wall of the first diversion hole 14.

The first guide hole 14 and the second guide hole 15 guide the positive electrolyte and the negative electrolyte, respectively. In one flow frame 10, the electrolyte leaked between the inner sealing line 12 and the outer sealing line 11 is guided out by the second guide holes 15, and the electrolyte in the first guide holes 14 passes through between the outer convex ring 17 and the side walls of the first guide holes 14 and is not guided out of the first guide holes 14. The second guiding hole 15 of one flow frame 10 is butted with the first guiding hole 14 of the adjacent flow frame 10, namely the electrolyte confluence of the flow frame 10 and the flow frame 10 spaced apart from the flow frame. Because the electric pile 20 is formed by alternately overlapping the positive single cells and the negative single cells, the positive single cells and the negative single cells are respectively placed on the adjacent liquid flow frames 10, and the homopolar single cells are placed on the spaced liquid flow frames 10, the annular mounting grooves 16 for mounting the sealing members are arranged in the first diversion holes 14, so that the positive electrolyte and the negative electrolyte guided out by the diversion grooves 13 cannot be mutually connected in series.

As shown in fig. 5, the stack 20 includes: a plurality of fluid flow frames 10, an access panel 21 and end panels 22, the two end panels 22 clamping the access panel 21 between the two end panels 22.

A plurality of fluidic frames 10 are disposed between the two access plates 21.

In the present embodiment, the stack 20 includes two cells, each cell includes two liquid inlet and outlet plates 21 and a plurality of flow frames 10, and the plurality of flow frames 10 are disposed between the two liquid inlet and outlet plates 21.

Alternatively, the stack 20 may include only one cell or three or more cells.

As shown in fig. 6, the liquid inlet and outlet plate 21 is provided with a guide groove 211, a guide hole 211 and a liquid outlet 214, the positions of the guide groove 211 and the guide hole correspond to the positions of the guide groove 13 and the guide hole, respectively, the liquid outlet 214 leads to the outside of the electric pile 20, and the liquid outlet 214 is communicated with the guide groove 211. Two guide holes, namely a first guide hole 212 and a second guide hole 213, are arranged in the liquid inlet and outlet plate 21, and an annular mounting groove is also arranged in the first guide hole 212 and is used for mounting a sealing element. The bottom surface of the first guiding hole 212 is provided with two mutually nested convex rings, an annular mounting groove is formed between the two convex rings, and the convex ring positioned on the outer layer is spaced from the side wall of the first guiding hole 212. The liquid outlet 214 is provided on the side surface of the liquid inlet/outlet plate 21, and the electrolyte discharged from each flow frame 10 is merged into the guide groove 211 through the second guide hole 213, and flows out of the cell stack 20 from the liquid outlet 214. The second guide hole 213 is abutted with the first guide hole 14 of the flow frame 10 adjacent to the liquid inlet and outlet plate 21, and the first guide hole 212 is abutted with the second guide hole 15 of the flow frame 10 adjacent to the liquid inlet and outlet plate 21.

The stack 20 also includes two end plates 22, the two end plates 22 clamping the inlet and outlet liquid plates 21 between the two end plates 22.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. A liquid flow frame is provided with an outer sealing line and an inner sealing line and is characterized in that a flow guide groove and a flow guide hole are arranged between the outer sealing line and the inner sealing line, and the flow guide groove is communicated with the flow guide hole;

the liquid flow frame is provided with two flow guide holes which are respectively a first flow guide hole and a second flow guide hole, an annular mounting groove is formed in the first flow guide hole, and the annular mounting groove is used for mounting a sealing element;

the bottom surface of the first flow guide hole is provided with two mutually-nested convex rings, an annular mounting groove is formed between the two convex rings, and the convex ring positioned on the outer layer is mutually spaced from the side wall of the first flow guide hole.

2. The flow frame of claim 1 wherein the flow channels are annular.

3. The flow frame of claim 1 wherein the flow guide holes are disposed in the flow guide slots.

4. An electric stack, characterized in that it comprises: a plurality of fluidic frames according to any of claims 1-3 and two fluid access plates, the plurality of fluidic frames being disposed between the two fluid access plates.

5. The stack according to claim 4, wherein the liquid inlet and outlet plate is provided with a guide groove, a guide hole and a liquid outlet, the positions of the guide groove and the guide hole correspond to the positions of the guide groove and the guide hole, respectively, the liquid outlet is opened to the outside of the stack, and the liquid outlet is communicated with the guide groove.

6. The stack of claim 5 wherein said exit port is located on a side of said access plate.

7. The stack of claim 4 further comprising two end plates, wherein the two end plates clamp the access plates between the two end plates.