Double-layer sealing line structure of all-vanadium redox flow battery membrane

Abstract

The utility model belongs to the field of all-vanadium redox flow battery membrane sealing, and particularly relates to an all-vanadium redox flow battery membrane double-layer sealing line structure which comprises membrane inner side sealing lines which are evenly distributed, a public flow channel sealing ring is arranged between every two adjacent membrane inner side sealing lines, one side of each membrane inner side sealing line is provided with a membrane outer side sealing line, and the other side of each membrane outer side sealing line is provided with a sealing ring. The plurality of membrane outer side sealing lines are uniformly arranged on the public runner sealing ring; wherein the membrane inner side sealing line is mainly used for performing a first sealing effect by extruding a membrane onto an electrode plate frame, the membrane outer side sealing line is used for performing a secondary pressurizing sealing effect on the membrane and is used as a second sealing defensive line, and the common runner sealing ring is used for sealing a common runner hole of the membrane and is used for sealing a common runner hole of the membrane. And meanwhile, the fixed concave-convex table can also enhance the friction force of the four common flow channel holes of the membrane, so that a better fixing effect is achieved, liquid leakage caused by displacement of the membrane at the position is prevented, and the effect of improving the sealing performance is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to all vanadium redox flow battery membrane seal field, concretely is a kind of all vanadium redox flow battery membrane double-layer sealing line structure. BACKGROUND

[0002] Ion exchange membrane is one of the most critical components in flow battery stack, and the air tightness thereof directly determines the performance efficiency of the battery. At present, the ion exchange membrane sealing method of most flow batteries still adopts rubber sealing. Compared with laser welding and hot melting, the rubber sealing method does not cause irreversible damage to the ion exchange membrane. If the stack has a problem, it can still be recycled. As the most expensive part in the stack, the ion exchange membrane is not negligible for profit-oriented enterprises. There are two ways of rubber sealing, namely face sealing and line sealing. The face sealing has a relatively large sealing area, requires more sealing materials, and requires a larger fastening force for the stack. The excessive fastening force requires higher hardness and toughness of other parts of the stack. Although the single line sealing can well avoid this situation, the line sealing requires high machining precision of related parts. If the machining precision of a part does not meet the requirements or there is an assembly error, the single line sealing is not firm, which causes the stack to leak on the membrane side. Therefore, the above-mentioned problems are solved by the double-layer sealing line structure of the all vanadium redox flow battery membrane. SUMMARY

[0003] In order to make up for the deficiencies of the prior art, the problems of the face sealing, i.e. a relatively large sealing area, a large amount of required sealing materials, a large fastening force required for the stack, and an excessive fastening force causing higher hardness and toughness requirements of other parts of the stack are solved. The single line sealing can well avoid this situation, but the line sealing requires high machining precision of related parts. If the machining precision of a part does not meet the requirements or there is an assembly error, the single line sealing is not firm, which causes the stack to leak on the membrane side. The double-layer sealing line structure of the all vanadium redox flow battery membrane is provided.

[0004] The utility model discloses a kind of double-layer sealing line structures of all vanadium redox flow battery membrane, and the technical scheme adopted to solve its technical problem is as follows: the double-layer sealing line structure of all vanadium redox flow battery membrane, including the membrane inner side sealing line of uniform distribution, every two adjacent membrane inner side sealing line is provided with public flow channel sealing ring, one side of the membrane inner side sealing line is provided with membrane outer side sealing line, a plurality of membrane outer side sealing lines are evenly provided with public flow channel sealing ring, corresponding membrane inner side sealing line and membrane outer side sealing line are provided with sealing assembly, and the sealing assembly is connected with public flow channel sealing ring.

[0005] Preferably, the sealing assembly comprises a plurality of sealing air bags, a plurality of connecting pipes and an air pipe, the plurality of sealing air bags are fixedly connected to the outside of a common flow channel sealing ring, the plurality of connecting pipes are communicated between two corresponding sealing air bags, and the air pipe is communicated with one of the connecting pipes.

[0006] Preferably, the sealing air bag is fixedly connected with a sealing gasket on the outside.

[0007] Preferably, the sealing gasket is made of corrosion-resistant rubber.

[0008] Preferably, the membrane inner sealing line and the membrane outer sealing line are made of corrosion-resistant rubber.

[0009] Preferably, the outside of the common flow channel sealing ring is provided with a fixed concave-convex platform.

[0010] The utility model discloses the beneficial effect lies in:

[0011] 1. The utility model discloses the membrane inner sealing line mainly is through extruding the membrane to the electrode plate frame and carries out the first sealing effect, and the membrane outer sealing line plays the secondary pressure sealing effect to the membrane, and as the second sealing defense line, and the common flow channel sealing ring seals the common flow channel hole position of the membrane, and the fixed concave-convex platform can also strengthen the friction force of four common flow channel holes of the membrane, and better fixing effect is played, prevents the membrane of this position from producing displacement and leads to the leakage, thereby reach the effect of increasing the sealing property.

[0012] 2. The utility model discloses after installation is completed, the inside of connecting pipe is inflated through the air pipe, and the inside of sealing air bag is inflated and expands in this way, and the sealing air bag will fill all the gaps in this way, and this can further increase the sealing property, thereby reach the effect that the sealing property is better. DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

[0014] Figure 1 It is the structure perspective view of the whole utility model;

[0015] Figure 2 It is the structure overhead view of the whole utility model;

[0016] Figure 3 It is the structure enlarged view of the place A of the utility model;

[0017] Figure 4 It is a structure diagram of the sealing assembly of the utility model.

[0018] In the figure: 1, the inner side sealing line of the film; 2, the outer side sealing line of the film; 3, the common flow channel sealing ring; 4, the sealing assembly; 401, the sealing air bag; 402, the connecting pipe; 403, the air pipe; 404, the sealing gasket; 5, the fixed concave and convex platform. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0020] Please refer to Figures 1-4 As shown in the figure, a kind of membrane double-layer sealing line structure of all-vanadium redox flow battery, including the inner side sealing line 1 of film being evenly distributed, common flow channel sealing ring 3 is arranged between every two adjacent inner side sealing line 1 of film, the outer side sealing line 2 of film is arranged on one side of inner side sealing line 1 of film, several outer side sealing lines 2 are evenly arranged with common flow channel sealing ring 3, sealing assembly 4 is arranged between corresponding inner side sealing line 1 of film and outer side sealing line 2 of film, sealing assembly 4 is connected with common flow channel sealing ring 3;

[0021] When working, after installation is completed, the inside of connecting pipe 402 is inflated by air pipe 403, so that the inside of sealing air bag 401 is inflated and expanded, so that sealing air bag 401 can fill all gaps, so that the sealing property can be further increased.

[0022] Further, sealing assembly 4 includes several sealing air bags 401, several connecting pipes 402 and air pipe 403, the outside of common flow channel sealing ring 3 is fixedly connected with several sealing air bags 401, two corresponding sealing air bags 401 are communicated with several connecting pipes 402, and air pipe 403 is communicated with one of connecting pipes 402.

[0023] When working, after installation is completed, the inside of connecting pipe 402 is inflated by air pipe 403, so that the inside of sealing air bag 401 is inflated and expanded, so that sealing air bag 401 can fill all gaps, so that the sealing property can be further increased.

[0024] Further, the outside of sealing air bag 401 is fixedly connected with sealing gasket 404.

[0025] When working, sealing gasket 404 can increase the sealing property of the device. When working, sealing gasket 404 can increase the sealing property of the device.

[0026] Further, the material of the sealing gasket 404 is corrosion-resistant rubber;

[0027] In operation, the rubber has good elasticity, and the corrosion resistance can increase the service life.

[0028] Further, the material of the inner membrane sealing line 1 and the outer membrane sealing line 2 is corrosion-resistant rubber;

[0029] In operation, the rubber has good elasticity, and the corrosion resistance can increase the service life.

[0030] Further, the outer part of the common flow channel sealing ring 3 is provided with a fixed concave-convex platform 5;

[0031] In operation, the fixed concave-convex platform 5 can also strengthen the friction force of the four common flow channel holes of the membrane, and has a better fixing effect, preventing the membrane at this position from being displaced to cause liquid leakage.

[0032] Working principle: manual assembly, first place the ion exchange membrane flat in the sealing groove inside the electrode plate frame membrane side, then place the four common flow channel holes at the four common flow channel hole positions of the electrode plate frame coaxially, ensure that the ion exchange membrane has no wrinkles, the inner membrane sealing line 1 and the outer membrane sealing line 2 are not folded or twisted, and then press the other side of the electrode plate frame to complete the membrane sealing operation of the single section liquid flow battery, wherein the inner membrane sealing line 1 is mainly used for the first sealing effect by extruding the membrane onto the electrode plate frame, the outer membrane sealing line 2 is used for the second pressure sealing of the membrane, and the common flow channel sealing ring 3 is used for sealing the common flow channel hole position of the membrane, and the fixed concave-convex platform 5 can also strengthen the friction force of the four common flow channel holes of the membrane, and has a better fixing effect, preventing the membrane at this position from being displaced to cause liquid leakage.

[0033] After installation, the inside of the connecting pipe 402 is inflated through the air pipe 403, so that the inside of the sealing air bag 401 is inflated and expanded, so that the sealing air bag 401 can fill all the gaps, so that the sealing performance can be further improved, thereby achieving better sealing performance.

[0034] The above shows and describes the basic principle, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. An all-vanadium redox flow battery membrane dual layer seal wire structure, characterized in that: The application relates to a sealing assembly for a common flow channel sealing ring (3) of a film, which comprises uniformly-distributed film inner sealing lines (1), a common flow channel sealing ring (3) arranged between every two adjacent film inner sealing lines (1), a film outer sealing line (2) arranged on one side of the film inner sealing line (1), and a sealing assembly (4) arranged between the film inner sealing line (1) and the film outer sealing line (2).

2. A membrane double layer seal wire structure for an all-vanadium redox flow battery according to claim 1, characterized in that: The sealing assembly (4) comprises sealing air bags (401), connecting pipes (402) and an air pipe (403), the sealing air bags (401) are fixedly connected to the outside of the common flow channel sealing ring (3), the connecting pipes (402) are connected between two corresponding sealing air bags (401), and the air pipe (403) is connected with one of the connecting pipes (402).

3. A membrane double layer seal wire structure for an all-vanadium redox flow battery according to claim 2, characterized in that: The sealing air bags (401) are fixedly connected with sealing pads (404) on the outside.

4. A membrane double layer seal wire structure for an all-vanadium redox flow battery according to claim 3, characterized in that: The sealing pads (404) are made of corrosion-resistant rubber.

5. The membrane dual seal wire structure for an all-vanadium redox flow battery of claim 1, wherein: The film inner sealing lines (1) and the film outer sealing lines (2) are made of corrosion-resistant rubber.

6. A membrane dual seal wire structure for a vanadium redox flow battery as claimed in claim 1, wherein: The common flow channel sealing ring (3) is provided with a fixed concave-convex platform (5) on the outside.

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