An apparatus for mitigating capacity fade of an all-vanadium redox flow battery

Abstract

The application relates to the technical field of batteries and discloses a device for relieving capacity attenuation of a full-vanadium liquid flow battery, which comprises a base, the upper surface of the base is fixedly connected with a negative electrode box, one side of the negative electrode box is provided with an electric box, one side of the electric box is provided with a positive electrode box, the upper surface of the base is provided with a filtering mechanism, one side of the filtering mechanism is provided with a separation mechanism, the upper surfaces of the negative electrode box and the positive electrode box are fixedly connected with a first connecting pipe, and one end of the first connecting pipe is provided with a condensing mechanism; the separation mechanism comprises a separation tank. Nitrogen is made to enter into the fifth connecting pipe through the air outlet pipe, a second booster pump is started to convey the nitrogen in the fifth connecting pipe into the inside of a second conveying pipe, the gas is conveyed into a nitrogen tank, nitrogen is blown into the inside of the negative electrode box and the positive electrode box through the second connecting pipe, the occurrence of a side reaction is reduced through the addition of nitrogen, and capacity attenuation is relieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a device for alleviating capacity attenuation of a full vanadium flow battery. BACKGROUND

[0002] As a renewable energy storage technology with high energy density and long cycle life, full vanadium flow batteries have been widely used in large-scale energy storage in recent years. The working principle of full vanadium flow batteries is to store and release energy through the oxidation and reduction reactions of vanadium ions in the electrolyte between the two electrodes of the battery. However, although full vanadium flow batteries have a long service life, the problem of capacity attenuation of the battery is still very prominent during actual operation, which is mainly caused by the following factors.

[0003] In existing full vanadium flow batteries, side reactions such as water decomposition reaction and oxygen reduction reaction have a negative impact on the performance of the battery. Side reactions not only consume vanadium ions in the electrolyte, but also may produce water and gas in the battery, which will cause capacity attenuation and efficiency reduction of the battery. The existing technology has limited means to control these side reactions.

[0004] If the water in the gas (such as the water produced by the hydroxide reaction in the battery) is not removed in time, it will have an adverse effect on the quality of the electrolyte inside the battery and the service life of the battery. Although there is a certain condensation technology for handling water, the condensation efficiency and water removal effect in the existing technology are still insufficient, and cannot effectively avoid the accumulation of water and its impact on the performance of the battery. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a device for alleviating capacity attenuation of a full vanadium flow battery, which solves the problem of capacity attenuation of a full vanadium flow battery caused by side reactions, water accumulation and gas pollution during long-term use.

[0006] To achieve the above purpose, the present application realizes the following technical scheme: a device for alleviating capacity attenuation of a full vanadium flow battery, comprising a base, the upper surface of the base is fixedly connected with a negative electrode box, one side of the negative electrode box is provided with an electric box, one side of the electric box is provided with a positive electrode box, the upper surface of the base is provided with a filtering mechanism, one side of the filtering mechanism is provided with a separation mechanism, the upper surfaces of the negative electrode box and the positive electrode box are fixedly connected with a first connecting pipe, one end of the first connecting pipe is provided with a condensing mechanism;

[0007] The separation mechanism comprises a separation tank, the outer wall of the separation tank is fixedly connected with a second fixing frame, the second fixing frame is fixedly connected to the upper surface of the base, the inner wall of the separation tank is fixedly connected with a partition plate, the inner wall of the partition plate is fixedly connected with a separation membrane, one end of the separation tank is fixedly connected with an air inlet pipe, the other end of the separation tank is fixedly connected with an air outlet pipe, and the outer wall of the separation tank is fixedly connected with a communication tank.

[0008] Preferably, the condensation mechanism comprises a condensation tank, the outer wall of the condensation tank is fixedly connected to one end of the first connecting pipe, the upper surface of the condensation tank is fixedly connected with a one-way valve, the lower surface of the condensation tank is fixedly connected with a drain valve, and one end of the drain valve is fixedly connected with a drain pipe.

[0009] Preferably, the inner part of the condensation tank is fixedly connected with a first baffle, the first baffle is fixedly connected with a condensation pipe, the outer wall of the condensation pipe is fixedly connected with a second baffle, the second baffle is fixedly connected to the inner wall of the condensation tank, the inner wall of the condensation tank is fixedly connected with a flow guide plate, and the inner part of the flow guide plate is fixedly connected with a condensation pipe.

[0010] Preferably, the filter mechanism comprises a filter box, the lower surface of the filter box is fixedly connected to the upper surface of the base, the inner part of the filter box is provided with a connecting frame, and the inner part of the connecting frame is fixedly connected with a filter core.

[0011] Preferably, the inner part of the filter box is fixedly connected with a first connecting pipe, the inner part of the filter box is fixedly connected with a gas conveying pipe, and the outer wall of the gas conveying pipe is fixedly connected to one end of the air inlet pipe.

[0012] Preferably, the upper surface of the base is fixedly connected with a cold water tank, one side of the cold water tank is fixedly connected with a second connecting pipe, one end of the second connecting pipe is fixedly connected with a conveying pump, the lower surface of the conveying pump is fixedly connected to the upper surface of the base, the output end of the conveying pump is fixedly connected with a first conveying pipe, one end of the first conveying pipe is fixedly connected to the outer wall of the condensation tank, the upper surface of the cold water tank is fixedly connected with a fourth connecting pipe, and one end of the fourth connecting pipe is fixedly connected to the outer wall of the condensation tank.

[0013] Preferably, the upper surface of the base is fixedly connected with a storage box, the upper surface of the storage box is fixedly connected to one end of the drain pipe, the outer wall of the storage box is fixedly connected with a first fixing frame, and the inner part of the first fixing frame is fixedly connected to the outer wall of the drain pipe.

[0014] Preferably, the upper surface of the base is fixedly connected with a first mounting seat, the upper surface of the first mounting seat is fixedly connected with a first booster pump, the input end of the first booster pump is fixedly connected with a third connecting pipe, one end of the third connecting pipe is fixedly connected with one end of a one-way valve, and the output end of the first booster pump is fixedly connected with one end of a first communicating pipe.

[0015] Preferably, the upper surface of the base is fixedly connected with a second mounting seat, the upper surface of the second mounting seat is fixedly connected with a second booster pump, the input end of the second booster pump is fixedly connected with a fifth connecting pipe, the outer wall of the fifth connecting pipe is fixedly connected with one end of an air outlet pipe, and the output end of the second booster pump is fixedly connected with a second conveying pipe.

[0016] Preferably, one end of the second conveying pipe is fixedly connected with a nitrogen tank, the outer wall of the nitrogen tank is fixedly connected with a rotating frame, the lower surface of the rotating frame is fixedly connected with the upper surface of the base, the outer wall of the nitrogen tank is fixedly connected with a second connecting pipe, and both ends of the second connecting pipe are fixedly connected with the upper surfaces of the negative electrode tank and the positive electrode tank.

[0017] The application provides a device for relieving capacity attenuation of a full vanadium redox flow battery.

[0018] 1、The nitrogen gas enters into the fifth connecting pipe through the air outlet pipe, the second booster pump is started to convey the nitrogen gas in the fifth connecting pipe into the inside of the second conveying pipe, the gas is conveyed into the nitrogen tank, the nitrogen gas is blown into the inside of the negative electrode tank and the positive electrode tank through the second connecting pipe, the occurrence of the side reaction is reduced by adding the nitrogen gas, and capacity attenuation is relieved.

[0019] 2、The gas enters into one end of the separation tank through the air inlet pipe, the gas enters into the inside of the separation membrane, the gas is separated through the separation membrane, the nitrogen gas enters into the other end of the separation tank through the air outlet pipe, the nitrogen gas is discharged through the air outlet pipe, the other gas is discharged into the air outlet pipe through the communicating tank, and the effect of separating and recycling the nitrogen gas is achieved.

[0020] 3、The gas enters into the condensing pipe through the blocking of the second baffle, the cold water is conveyed into the first baffle and the second baffle, the baffle plate guides the flow of the cold water on the outer wall of the condensing pipe, the condensing pipe is cooled, the water in the gas is condensed, and the water falls into the bottom of the condensing tank, and the effect of removing the water in the gas is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a perspective view of the application;

[0022] Figure 2 It is a side view of the application;

[0023] Figure 3 This is a schematic diagram of the storage box of the present invention;

[0024] Figure 4 This is a cross-sectional view of the condenser of the present invention;

[0025] Figure 5 This is a schematic diagram of the cold water tank of the present invention;

[0026] Figure 6 This is a cross-sectional view of the filter box of the present invention;

[0027] Figure 7 This is a schematic diagram of the second fixing frame of the present invention;

[0028] Figure 8 This is a cross-sectional view of the separation tank of the present invention;

[0029] Figure 9 This is a schematic diagram of the nitrogen tank of the present invention.

[0030] The components include: 1. Base; 2. Negative electrode box; 3. Electrical box; 4. Positive electrode box; 5. Condensation mechanism; 501. Condensation tank; 502. One-way valve; 503. Drain valve; 504. First baffle; 505. Second baffle; 506. Guide plate; 507. Condensation pipe; 508. Drain pipe; 6. Separation mechanism; 601. Separation tank; 602. Gas outlet pipe; 603. Exhaust pipe; 604. Connecting tank; 605. Partition plate; 606. Separation membrane; 607. Inlet pipe; 7. Filtration mechanism; 701. Filter box; 702. Connecting frame; 7 03. Filter element; 704. First connecting pipe; 705. Gas supply pipe; 8. First connecting pipe; 9. Second connecting pipe; 10. Third connecting pipe; 11. First delivery pipe; 12. First fixing frame; 13. Delivery pump; 14. Second connecting pipe; 15. Storage tank; 16. Cold water tank; 17. Fourth connecting pipe; 18. First booster pump; 19. First mounting base; 20. Second booster pump; 21. Second mounting base; 22. Fifth connecting pipe; 23. Second fixing frame; 24. Second delivery pipe; 25. Rotating frame; 26. Nitrogen tank. Detailed Implementation

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see the appendix Figure 1 - Appendix Figure 9The embodiment of the present application provides a device for relieving capacity attenuation of a full vanadium redox flow battery, which comprises a base 1, a negative electrode box 2 fixedly connected to the upper surface of the base 1, an electric box 3 arranged on one side of the negative electrode box 2, a positive electrode box 4 arranged on one side of the electric box 3, a filtering mechanism 7 arranged on the upper surface of the base 1, a separation mechanism 6 arranged on one side of the filtering mechanism 7, a first connecting pipe 8 fixedly connected to the upper surfaces of the negative electrode box 2 and the positive electrode box 4, and a condensing mechanism 5 arranged at one end of the first connecting pipe 8.

[0033] Specifically, the gas enters one end of the separation tank 601 through the air inlet pipe 607 and enters the inside of the separation membrane 606, and then the gas is separated through the separation membrane 606, so that the nitrogen gas enters the other end of the separation tank 601 through the air outlet pipe 602, and then the nitrogen gas is discharged through the air outlet pipe 602, and other gases are discharged into the air outlet pipe 603 through the communication tank 604.

[0034] The condensing mechanism 5 comprises a condensing tank 501, the outer wall of the condensing tank 501 is fixedly connected to one end of the first connecting pipe 8, a one-way valve 502 is fixedly connected to the upper surface of the condensing tank 501, a drain valve 503 is fixedly connected to the lower surface of the condensing tank 501, and the one end of the drain valve 503 is fixedly connected to a drain pipe 508; a first baffle 504 is fixedly connected in the inside of the condensing tank 501, the condensing pipe 507 is fixedly connected to the first baffle 504, the outer wall of the condensing pipe 507 is fixedly connected to a second baffle 505, the second baffle 505 is fixedly connected to the inner wall of the condensing tank 501, a flow guide plate 506 is fixedly connected to the inner wall of the condensing tank 501, and the condensing pipe 507 is fixedly connected in the inside of the flow guide plate 506.

[0035] Specifically, the gas in the negative electrode tank 2 and the positive electrode tank 4 enters the inside of the condensing tank 501 through the first connecting pipe 8, and enters the condensing pipe 507 through the blocking of the second baffle 505, and then the cold water is delivered into the first baffle 504 and the second baffle 505, and the flow guide plate 506 guides the flow of the cold water on the outer wall of the condensing pipe 507, thereby cooling the condensing pipe 507 to condense the water in the gas, and the water falls to the bottom of the condensing tank 501, and the water enters the drain pipe 508 through the drain valve 503, thereby discharging the water, and the gas enters the top end of the condensing tank 501 through the condensing pipe 507, and the one-way valve 502 discharges the gas.

[0036] The filter mechanism 7 comprises a filter box 701, the lower surface of the filter box 701 is fixedly connected to the upper surface of the base 1, the inside of the filter box 701 is provided with a connecting frame 702, and the inside of the connecting frame 702 is fixedly connected with a filter core 703; the inside of the filter box 701 is fixedly connected with a first communicating pipe 704, and the inside of the filter box 701 is fixedly connected with a gas conveying pipe 705, and the outer wall of the gas conveying pipe 705 is fixedly connected to one end of the air inlet pipe 607;

[0037] Specifically, the gas enters the inside of the filter box 701 through the first communicating pipe 704, and the gas is filtered through the filter core 703, so that the impurities in the gas are filtered out, and the gas enters the inside of the gas conveying pipe 705, and the gas is discharged, and the filter mechanism 7 is pulled in the inside of the filter box 701, and the filter core 703 is driven to move, thereby taking out the filter core 703, so that the effect of replacement is achieved.

[0038] The upper surface of the base 1 is fixedly connected with a cold water tank 16, one side of the cold water tank 16 is fixedly connected with a second communicating pipe 14, one end of the second communicating pipe 14 is fixedly connected with a conveying pump 13, the lower surface of the conveying pump 13 is fixedly connected to the upper surface of the base 1, the output end of the conveying pump 13 is fixedly connected with a first conveying pipe 11, one end of the first conveying pipe 11 is fixedly connected to the outer wall of the condensing tank 501, the upper surface of the cold water tank 16 is fixedly connected with a fourth connecting pipe 17, and one end of the fourth connecting pipe 17 is fixedly connected to the outer wall of the condensing tank 501;

[0039] Specifically, the water in the cold water tank 16 is pumped out through the second communicating pipe 14 by starting the output end of the conveying pump 13, and is conveyed into the first conveying pipe 11, thereby being conveyed into the inside of the condensing tank 501 through the first conveying pipe 11, and being cooled, and the cold water in the condensing tank 501 is discharged into the cold water tank 16 through the fourth connecting pipe 17 to be cooled.

[0040] The upper surface of the base 1 is fixedly connected with a storage box 15, the upper surface of the storage box 15 is fixedly connected with one end of a drain pipe 508, the outer wall of the storage box 15 is fixedly connected with a first fixing frame 12, the inside of the first fixing frame 12 is fixedly connected with the outer wall of the drain pipe 508;

[0041] Specifically, the condensate tank 501 is fixed by the first fixing frame 12, the condensed water is discharged into the inside of the storage box 15 through the drain pipe 508, and then the condensed water is collected by the storage box 15.

[0042] The upper surface of the base 1 is fixedly connected with a first mounting seat 19, the upper surface of the first mounting seat 19 is fixedly connected with a first booster pump 18, the input end of the first booster pump 18 is fixedly connected with a third connecting pipe 10, one end of the third connecting pipe 10 is fixedly connected with one end of a one-way valve 502, and the output end of the first booster pump 18 is fixedly connected with one end of a first communicating pipe 704;

[0043] Specifically, the first booster pump 18 is fixed on the base 1 by the first mounting seat 19, the gas in the condensate tank 501 is extracted through the third connecting pipe 10 by starting the first booster pump 18, and is delivered to the inside of the first communicating pipe 704 by the first booster pump 18, and then is filtered.

[0044] The upper surface of the base 1 is fixedly connected with a first mounting seat 19, the upper surface of the first mounting seat 19 is fixedly connected with a first booster pump 18, the input end of the first booster pump 18 is fixedly connected with a third connecting pipe 10, one end of the third connecting pipe 10 is fixedly connected with one end of a one-way valve 502, and the output end of the first booster pump 18 is fixedly connected with one end of a first communicating pipe 704; the upper surface of the base 1 is fixedly connected with a second mounting seat 21, the upper surface of the second mounting seat 21 is fixedly connected with a second booster pump 20, the input end of the second booster pump 20 is fixedly connected with a fifth connecting pipe 22, the outer wall of the fifth connecting pipe 22 is fixedly connected with one end of an air outlet pipe 602, the output end of the second booster pump 20 is fixedly connected with a second delivery pipe 24; one end of the second delivery pipe 24 is fixedly connected with a nitrogen tank 26, the outer wall of the nitrogen tank 26 is fixedly connected with a rotating frame 25, the lower surface of the rotating frame 25 is fixedly connected with the upper surface of the base 1, the outer wall of the nitrogen tank 26 is fixedly connected with a second connecting pipe 9, and both ends of the second connecting pipe 9 are fixedly connected with the negative electrode box 2 and the positive electrode box 4 respectively;

[0045] Specifically, nitrogen is introduced into the fifth connecting pipe 22 through the gas outlet pipe 602, the second booster pump 20 is fixed on the base 1 through the second mounting seat 21, and the second booster pump 20 is started to deliver the nitrogen in the fifth connecting pipe 22 into the second delivery pipe 24, and the gas is delivered into the nitrogen tank 26, and then the nitrogen is blown into the interiors of the negative electrode tank 2 and the positive electrode tank 4 through the second connecting pipe 9, and then the occurrence of side reactions is reduced by adding nitrogen, so as to relieve the capacity attenuation.

[0046] Working principle: first through the nitrogen tank 26 into the second connecting pipe 9, and the nitrogen into the negative tank 2 and the positive tank 4 inside, and then through the first connecting pipe 8 into the gas in the negative tank 2 and the positive tank 4 into the inside of the condensing tank 501, through the second baffle 505 of the gas into the condensing pipe 507, through the starting of the delivery pump 13 output end of the water in the cold water tank 16 through the second communication pipe 14, and is transported to the first conveying pipe 11, so that through the first conveying pipe 11 to the inside of the condensing tank 501, through the cold water to the first baffle 504 and the second baffle 505, in the flow guide plate 506 on the cold water flow in the outer wall of the condensing pipe 507, and then the condensing pipe 507 cooling gas in the water condensation, make the water into the bottom of the condensing tank 501, make the water through the drain valve 503 into the drain pipe 508, so as to discharge the water, through the drain pipe 508 makes the condensed water into the inside of the storage tank 15, and then through the storage tank 15 to collect the condensed water, through the fourth connecting pipe 17 makes the cold water in the condensing tank 501 into the cold water tank 16 for cooling, the gas through the condensing pipe 507 into the top end of the condensing tank 501, and makes the one-way valve 502 to discharge the gas, through the starting of the first booster pump 18 makes the gas through the third connecting pipe 10, and through the first booster pump 18 to the inside of the first communication pipe 704, through the first communication pipe 704 of the gas into the filter box 701 inside, and through the filter core 703 to filter the gas, the impurities in the gas are filtered out, and the gas enters the inside of the gas conveying pipe 705, and the gas is discharged, by pulling the filter mechanism 7 in the filter box 701, and driving the filter core 703 to move, and then the filter core 703 is taken out, so as to replace the effect, through the air inlet pipe 607 makes the gas into the one end of the separation tank 601, and makes the gas into the inside of the separation membrane 606, and then through the separation membrane 606 to separate the gas, the nitrogen gas through the gas outlet pipe 602 into the other end of the separation tank 601, and then through the gas outlet pipe 602 to discharge the nitrogen gas, other gas through the communication tank 604 into the exhaust pipe 603, and then discharge the gas, through the gas outlet pipe 602 makes the nitrogen into the fifth connecting pipe 22, starts the second booster pump 20 to send the nitrogen in the fifth connecting pipe 22 to the inside of the second conveying pipe 24, and makes the gas into the nitrogen tank 26, and then through the second connecting pipe 9 into the negative tank 2 and the positive tank 4 inside, and then through the nitrogen to reduce the occurrence of side reaction, to relieve the effect of capacity attenuation.

[0047] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A device for mitigating capacity fade in a vanadium redox flow battery, comprising a base (1), characterised in that, The upper surface of the base (1) is fixedly connected with a negative tank (2), one side of the negative tank (2) is provided with an electric tank (3), one side of the electric tank (3) is provided with a positive tank (4), the upper surface of the base (1) is provided with a filtering mechanism (7), one side of the filtering mechanism (7) is provided with a separation mechanism (6), the upper surfaces of the negative tank (2) and the positive tank (4) are fixedly connected with a first connecting pipe (8), one end of the first connecting pipe (8) is provided with a condensing mechanism (5). The separation mechanism (6) comprises a separation tank (601), the outer wall of the separation tank (601) is fixedly connected with a second fixing frame (23), the second fixing frame (23) is fixedly connected to the upper surface of the base (1), the inner wall of the separation tank (601) is fixedly connected with a partition plate (605), the inner wall of the partition plate (605) is fixedly connected with a separation membrane (606), one end of the separation tank (601) is fixedly connected with an air inlet pipe (607), the other end of the separation tank (601) is fixedly connected with an air outlet pipe (602), the outer wall of the separation tank (601) is fixedly connected with a communication tank (604), one end of the communication tank (604) is fixedly connected with an exhaust pipe (603). The upper surface of the base (1) is fixedly connected with a second mounting seat (21), the upper surface of the second mounting seat (21) is fixedly connected with a second booster pump (20), the input end of the second booster pump (20) is fixedly connected with a fifth connecting pipe (22), the outer wall of the fifth connecting pipe (22) is fixedly connected to one end of the air outlet pipe (602), the output end of the second booster pump (20) is fixedly connected with a second conveying pipe (24), one end of the second conveying pipe (24) is fixedly connected with a nitrogen tank (26), the outer wall of the nitrogen tank (26) is fixedly connected with a rotating frame (25), the lower surface of the rotating frame (25) is fixedly connected to the upper surface of the base (1), the outer wall of the nitrogen tank (26) is fixedly connected with a second connecting pipe (9), both ends of the second connecting pipe (9) are fixedly connected to the upper surfaces of the negative tank (2) and the positive tank (4).

2. The device for mitigating capacity fade of an all-vanadium redox flow battery according to claim 1, wherein, The condensing mechanism (5) comprises a condensing tank (501), the outer wall of the condensing tank (501) is fixedly connected to one end of the first connecting pipe (8), the upper surface of the condensing tank (501) is fixedly connected with a check valve (502), the lower surface of the condensing tank (501) is fixedly connected with a drain valve (503), one end of the drain valve (503) is fixedly connected with a drain pipe (508).

3. The device for mitigating capacity fade of an all-vanadium redox flow battery according to claim 2, wherein, The inner part of the condensing tank (501) is fixedly connected with a first baffle (504), the first baffle (504) is fixedly connected with a condensing pipe (507), the outer wall of the condensing pipe (507) is fixedly connected with a second baffle (505), the second baffle (505) is fixedly connected to the inner wall of the condensing tank (501), the inner wall of the condensing tank (501) is fixedly connected with a flow guide plate (506), the inner part of the flow guide plate (506) is fixedly connected with the condensing pipe (507).

4. The device for mitigating capacity fade of an all-vanadium redox flow battery according to claim 3, wherein, The filter mechanism (7) includes a filter box (701), the lower surface of the filter box (701) is fixedly connected to the upper surface of the base (1), the inside of the filter box (701) is provided with a connecting frame (702), and the inside of the connecting frame (702) is fixedly connected with a filter core (703).

5. The device for mitigating capacity fade of an all-vanadium redox flow battery according to claim 4, wherein, The inside of the filter box (701) is fixedly connected with a first communicating pipe (704), the inside of the filter box (701) is fixedly connected with a gas conveying pipe (705), and the outer wall of the gas conveying pipe (705) is fixedly connected to one end of the air inlet pipe (607).

6. The device for mitigating capacity fade of a vanadium redox flow battery of claim 5, wherein, The upper surface of the base (1) is fixedly connected with a cold water tank (16), one side of the cold water tank (16) is fixedly connected with a second communicating pipe (14), one end of the second communicating pipe (14) is fixedly connected with a conveying pump (13), the lower surface of the conveying pump (13) is fixedly connected to the upper surface of the base (1), the output end of the conveying pump (13) is fixedly connected with a first conveying pipe (11), one end of the first conveying pipe (11) is fixedly connected to the outer wall of the condensing tank (501), the upper surface of the cold water tank (16) is fixedly connected with a fourth connecting pipe (17), and one end of the fourth connecting pipe (17) is fixedly connected to the outer wall of the condensing tank (501).

7. The device for mitigating capacity fade of an all-vanadium redox flow battery according to claim 6, wherein, The upper surface of the base (1) is fixedly connected with a storage box (15), the upper surface of the storage box (15) is fixedly connected to one end of the drain pipe (508), and the outer wall of the storage box (15) is fixedly connected with a first fixing frame (12).

8. The device for mitigating capacity fade of an all-vanadium redox flow battery according to claim 7, wherein, The upper surface of the base (1) is fixedly connected with a first mounting base (19), the upper surface of the first mounting base (19) is fixedly connected with a first booster pump (18), the input end of the first booster pump (18) is fixedly connected with a third connecting pipe (10), one end of the third connecting pipe (10) is fixedly connected to one end of the one-way valve (502), and the output end of the first booster pump (18) is fixedly connected to one end of the first communicating pipe (704).

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