Novel efficient leakage-proof all-vanadium redox flow battery and electric pile structure

Abstract

The utility model relates to the technical field of redox flow batteries, and discloses a novel efficient leakproof all-vanadium redox flow battery and galvanic pile structure, which comprises an anode rod, anode sealant is arranged on the surface of the anode rod, an anode tee joint is adhered to the bottom end of the anode sealant, the right side of the anode tee joint is fixedly connected with an anode electrolyte discharge pipe, and the right side of the anode tee joint is fixedly connected with a cathode electrolyte discharge pipe. An O-shaped ring is arranged at the bottom of the anode tee joint, a sealing buckle is arranged on the surface of the O-shaped ring, the outer surface of the bottom end of the anode tee joint is fixedly sleeved with a cathode outer frame, an inner cavity of the cathode outer frame is fixedly sleeved with a cathode rod, and cathode sealants are arranged at the upper end and the lower end of the cathode rod. The left side of the cathode outer frame is fixedly connected with a cathode electrolyte discharge pipe; therefore, the anode electrolyte and the cathode electrolyte can be completely isolated through multiple sealing of the anode sealant, the cathode sealant and the sealing buckle without depending on high-strength compression of a bolt, and internal leakage and external leakage of a battery stack are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid flow batteries, and more specifically, to a novel high-efficiency, leak-proof all-vanadium liquid flow battery and a battery stack structure. Background Art

[0002] Traditional flow batteries have a flat-plate structure, meaning the proton membrane, carbon felt, and bipolar plates are all flat. To prevent leakage, the membrane, carbon felt, and bipolar plates are bonded or welded to the frame and then compressed with gaskets to prevent electrolyte leakage. For a 30kW stack, the number of layers of proton membrane, carbon felt, and bipolar plates exceeds 60, making sealing the flow current a paramount task.

[0003] If there is leakage in the flow battery, it will directly affect the efficiency of the battery. Internal and external leakage of the flow battery are important factors affecting the efficiency of the flow battery. To prevent external leakage of the flow battery, whether it is a single cell or a stack, many bolts are set around it to tighten the membrane, bipolar plates, etc. through sealing gaskets. For a single cell, the weight of the bolts and end plates exceeds the weight of the membrane, carbon felt, etc. To prevent internal leakage of the flow battery, the membrane needs to be welded or heat-fused to the plate frame. If the welding or fusion is defective, it will affect the efficiency of the battery. Especially when the number of series sections in the stack is large, different single cells are connected in series through bipolar plates, and the requirements for tightening bolts are higher. It is particularly important to design the battery to be leak-proof.

[0004] For liquid flow battery stacks, in addition to being fastened by bolts on all sides, each single cell of the stacked liquid flow battery also adopts multiple seals. The existing sealing technologies mainly include wire sealing, surface sealing, laser welding sealing and hot melt welding sealing. However, most sealing structures require special structures to be designed on the frame plate to cooperate with the sealing materials. In addition, the design accuracy of the sealing structure on the plate frame is generally high, and the processing is difficult. The resulting assembly process is also more complicated. During the assembly of the stack, any slight error in a certain link will directly cause the stack seal to fail. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a novel high-efficiency leak-proof all-vanadium liquid flow battery stack structure, which has the advantage of preventing internal or external leakage of the battery stack.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a novel high-efficiency leak-proof all-vanadium liquid flow battery structure, comprising an anode rod, the surface of the anode rod is provided with an anode sealant, the bottom end of the anode sealant is adhered to an anode tee, the right side of the anode tee is fixedly connected to an anode electrolyte discharge pipe, the bottom of the anode tee is provided with an O-ring, the surface of the O-ring is provided with a sealing buckle, the outer surface of the bottom end of the anode tee is fixedly sleeved with a cathode outer frame, the inner cavity of the cathode outer frame is fixedly sleeved with a cathode rod, the upper and lower ends of the cathode rod are provided with cathode sealant, the left side of the cathode outer frame is fixedly connected to the cathode electrolyte discharge pipe, the bottom end of the cathode outer frame is fixedly connected to the cathode electrolyte inlet pipe, and the bottom end of the anode tee is fixedly connected to a tubular membrane.

[0007] As a preferred technical solution of the present invention, there are two anode tees, which are respectively located on the upper and lower sides of the cathode outer frame, and the right side of the anode tee located on the lower side is fixedly connected to the anode electrolyte inlet pipe.

[0008] As a preferred technical solution of the present invention, the tubular membrane is fixed inside the cathode outer frame through the anode tee, and there are a plurality of cathode rods, which are evenly distributed around the tubular membrane.

[0009] As a preferred technical solution of the present invention, the surface of the cathode rod is sleeved with cathode carbon felt, and the surface of the anode rod is sleeved with anode carbon felt.

[0010] As a preferred technical solution of the present invention, a connecting rod is fixedly connected to the outer surface of the cathode outer frame, and a separating contact plate is fixedly connected to the side of the connecting rod away from the cathode outer frame.

[0011] As a preferred technical solution of the present invention, an anti-slip groove is provided on a side of the separating contact plate away from the connecting rod, and the separating contact plate is arc-shaped.

[0012] A new type of high-efficiency leak-proof all-vanadium liquid flow battery stack structure, including multiple new type of high-efficiency leak-proof all-vanadium liquid flow battery structures connected in parallel, and also includes a cathode outer frame, the inner cavity of the cathode outer frame is fixedly connected to an anode rod, the surface of the cathode outer frame is sleeved with a tubular membrane, the outer side of the tubular membrane is fixedly connected to an anode electrolyte discharge pipe, the inner cavity of the cathode outer frame is fixedly connected to a cathode rod, the rear side of the cathode outer frame is fixedly connected to a cathode electrolyte discharge pipe, and the side of the cathode outer frame away from the cathode electrolyte discharge pipe is fixedly connected to an anode electrolyte inlet pipe.

[0013] As a preferred technical solution of the present invention, there are a plurality of cathode rods, all of which are fixedly mounted in the inner cavity of the cathode outer frame, and are evenly distributed around the tubular membrane.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The utility model realizes the charging or discharging process by having the electrolyte flow along the cathode carbon felt and the anode carbon felt respectively and pass through the tubular membrane. In this process, the anode sealant and the cathode sealant are bonded and sealed, and the sealing buckle is a mechanical compaction seal. The utility model has an annular membrane structure as a whole, so it does not rely on the high-strength compression of bolts. Moreover, through the multiple sealing of the anode sealant, the cathode sealant and the sealing buckle, the positive and negative electrolytes are completely isolated, thereby preventing internal and external leakage of the battery stack.

[0016] 2. The utility model sets a spacer contact plate so that when multiple cathode outer frames are placed or installed together, they can contact other cathode outer frames through the spacer contact plate, thereby maintaining a gap between the cathode outer frames, and connecting rods of different lengths can be processed according to the length of the gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the connection of the tubular membrane structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the cathode outer frame connection of the utility model structure;

[0020] Figure 4 This is a schematic diagram of the connection of the separated contact plates of the structure of the utility model;

[0021] Figure 5 This is a schematic diagram of the cathode rod connection structure of the utility model;

[0022] Figure 6 This is a schematic diagram of the tubular membrane connection structure of the utility model.

[0023] In the figure: 1. anode rod; 2. anode sealant; 3. anode electrolyte discharge pipe; 4. sealing buckle; 5. anode tee; 6. O-ring; 7. cathode rod; 8. cathode sealant; 9. cathode electrolyte discharge pipe; 10. cathode outer frame; 11. anode electrolyte inlet pipe; 12. cathode electrolyte inlet pipe; 13. tubular membrane; 14. cathode carbon felt; 15. anode carbon felt; 16. connecting rod; 17. separating contact plate. DETAILED DESCRIPTION

[0024] 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.

[0025] Example 1: Figures 1 to 4 As shown, the utility model provides a novel high-efficiency leak-proof all-vanadium liquid flow battery structure, comprising an anode rod 1, an anode sealant 2 is provided on the surface of the anode rod 1, an anode tee 5 is adhered to the bottom end of the anode sealant 2, an anode electrolyte discharge pipe 3 is fixedly connected to the right side of the anode tee 5, an O-ring 6 is provided at the bottom of the anode tee 5, a sealing buckle 4 is provided on the surface of the O-ring 6, a cathode outer frame 10 is fixedly sleeved on the outer surface of the bottom end of the anode tee 5, a cathode rod 7 is fixedly sleeved on the inner cavity of the cathode outer frame 10, cathode sealant 8 is provided on the upper and lower ends of the cathode rod 7, a cathode electrolyte discharge pipe 9 is fixedly connected to the left side of the cathode outer frame 10, a cathode electrolyte inlet pipe 12 is fixedly connected to the bottom end of the cathode outer frame 10, and a tubular membrane 13 is fixedly connected to the bottom end of the anode tee 5;

[0026] The electrolyte flows along the cathode carbon felt 14 and the anode carbon felt 15 respectively, and the charging or discharging process is realized after passing through the tubular membrane 13. During this process, the anode sealant 2 and the cathode sealant 8 are bonded and sealed, and the sealing buckle 4 is a mechanical compaction seal. In addition, the utility model is a ring membrane structure as a whole, so it does not rely on the high-strength compression of bolts. In addition, through the multiple sealing of the anode sealant 2, the cathode sealant 8 and the sealing buckle 4, the positive and negative electrolytes are completely isolated, thereby preventing internal and external leakage of the battery.

[0027] There are two anode tees 5, which are located on the upper and lower sides of the cathode outer frame 10 respectively. The right side of the anode tee 5 located on the lower side is fixedly connected to the anode electrolyte inlet pipe 11;

[0028] By setting the anolyte inlet pipe 11, the anolyte can enter the inner cavity of the anode tee 5 along the anolyte inlet pipe 11, then enter the inner cavity of the tubular membrane 13, and then be discharged through the anolyte discharge pipe 3, thereby realizing the flow of the electrolyte.

[0029] The tubular membrane 13 is fixed to the inside of the cathode outer frame 10 through the anode tee 5. There are multiple cathode rods 7, which are evenly distributed around the tubular membrane 13.

[0030] The tubular membrane 13 is fixed to the inside of the cathode outer frame 10 through the anode tee 5, so that the anode tee 5 can support and fix the tubular membrane 13, and then evenly distributed around the tubular membrane 13 through the cathode rod 7, so that electrical energy can be input through the cathode rod 7 and the anode rod 1.

[0031] The surface of the cathode rod 7 is sleeved with a cathode carbon felt 14, and the surface of the anode rod 1 is sleeved with an anode carbon felt 15;

[0032] By disposing the cathode carbon felt 14 and the anode carbon felt 15 , the electrolyte can flow along the cathode carbon felt 14 and the anode carbon felt 15 , and then achieve charging or discharging after passing through the tubular membrane 13 .

[0033] The outer surface of the cathode outer frame 10 is fixedly connected to a connecting rod 16 , and a side of the connecting rod 16 away from the cathode outer frame 10 is fixedly connected to a spacer contact plate 17 ;

[0034] By setting the separating contact plate 17, when multiple cathode outer frames 10 are placed together or installed together, they can contact other cathode outer frames 10 through the separating contact plate 17, thereby maintaining a gap between the cathode outer frames 10, and connecting rods 16 of different lengths can be processed according to the length of the gap.

[0035] Among them, a non-slip groove is provided on the side of the separating contact plate 17 away from the connecting rod 16, and the separating contact plate 17 is arc-shaped;

[0036] By providing an anti-slip groove on the side of the separating contact plate 17 away from the connecting rod 16 , the friction between the separating contact plate 17 and other cathode outer frames 10 is increased, thereby avoiding slipping and improving stability.

[0037] The working principle and use process of the utility model are as follows: the electrolyte flows along the cathode carbon felt 14 and the anode carbon felt 15 respectively, and realizes the charging difficulty process after passing through the tubular membrane 13, and in order to ensure the sealing of the single cell, it is mainly completed by the anode sealant 2, the cathode sealant 8, and the sealing buckle 4;

[0038] The anode rod 1 is located in the middle, and the tubular membrane 13 is then fixed through the anode tee 5. The cathode rods 7 are evenly distributed around the tubular membrane 13. During the energy storage and release process, electrical energy is input through the anode rod 1 and the cathode rod 7, and the anode electrolyte completes the flow of the electrolyte through the anode electrolyte discharge pipe 3 and the anode electrolyte inlet pipe 11, and the cathode electrolyte completes the flow of the electrolyte through the cathode electrolyte discharge pipe 9 and the cathode electrolyte inlet pipe 12.

[0039] Example 2: Figure 5 and Figure 6As shown, the utility model provides a novel high-efficiency leak-proof all-vanadium liquid flow battery stack structure, which includes a plurality of novel high-efficiency leak-proof all-vanadium liquid flow battery structures connected in parallel, and also includes a cathode outer frame 10, the inner cavity of the cathode outer frame 10 is fixedly connected to the anode rod 1, the surface of the cathode outer frame 10 is sleeved with a tubular membrane 13, the outer side of the tubular membrane 13 is fixedly connected to the anolyte discharge pipe 3, the inner cavity of the cathode outer frame 10 is fixedly connected to the cathode rod 7, the rear side of the cathode outer frame 10 is fixedly connected to the cathode electrolyte discharge pipe 9, and the side of the cathode outer frame 10 away from the cathode electrolyte discharge pipe 9 is fixedly connected to the anolyte inlet pipe 11;

[0040] The cathode carbon felt 14 and the anode carbon felt 15 in a single cell are distributed more evenly, so there is no possibility of internal leakage. The multiple sealing of the single cell avoids internal and external leakage of the stack, thereby improving the overall efficiency of the stack and reducing the difficulty of overall assembly of the stack.

[0041] There are multiple cathode rods 7, all of which are fixedly mounted in the inner cavity of the cathode outer frame 10, and are evenly distributed around the tubular membrane 13.

[0042] By disposing a plurality of cathode rods 7, electric energy can be input from the anode rods 1 and the cathode rods 7, and the storage and release of electric current are completed.

[0043] The working principle and usage process of the present invention are as follows: the interior of the cathode outer frame 10 is composed of five single cells connected in parallel, with five anode units inside and a total cathode unit outside. Each anode unit includes an anode rod 1, a tubular membrane 13, and an anode electrolyte discharge pipe 3. On the cathode side, there are several cathode rods 7 evenly distributed in the cathode carbon felt 14 to complete the storage and release of current. On the cathode side, there is a total cathode outer frame, and the cathode electrolyte completes the entry and exit process through the cathode electrolyte discharge pipe 9 and the anode electrolyte inlet pipe 11. The anode electrolyte is connected to each anode tee 5 through a total pipeline to achieve the distribution of the anode electrolyte. The anode rod 1, anode tee 5, tubular membrane 13, and the seal at the cathode are similar to those of a single cell. By connecting multiple single cells in parallel, a larger current can be obtained.

[0044] 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 any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0045] 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 novel high-efficiency leak-proof all-vanadium liquid flow battery structure, comprising an anode rod (1), characterized in that: The surface of the anode rod (1) is provided with an anode sealant (2), the bottom end of the anode sealant (2) is adhered with an anode tee (5), the right side of the anode tee (5) is fixedly connected with an anode electrolyte discharge pipe (3), the bottom of the anode tee (5) is provided with an O-ring (6), the surface of the O-ring (6) is provided with a sealing buckle (4), the outer surface of the bottom end of the anode tee (5) is fixedly sleeved with a cathode outer frame (10), the inner cavity of the cathode outer frame (10) is fixedly sleeved with a cathode rod (7), the upper and lower ends of the cathode rod (7) are both provided with cathode sealant (8), the left side of the cathode outer frame (10) is fixedly connected with a cathode electrolyte discharge pipe (9), the bottom end of the cathode outer frame (10) is fixedly connected with a cathode electrolyte inlet pipe (12), and the bottom end of the anode tee (5) is fixedly connected with a tubular membrane (13).

2. The novel high-efficiency leak-proof all-vanadium redox flow battery structure according to claim 1 is characterized in that: There are two anode tees (5) in total. The two anode tees (5) are respectively located on the upper and lower sides of the cathode outer frame (10). The right side of the anode tee (5) located on the lower side is fixedly connected to the anode electrolyte inlet pipe (11).

3. The novel high-efficiency leak-proof all-vanadium redox flow battery structure according to claim 1 is characterized in that: The tubular membrane (13) is fixed inside the cathode outer frame (10) through the anode tee (5). There are a plurality of cathode rods (7), and the plurality of cathode rods (7) are evenly distributed around the tubular membrane (13).

4. The novel high-efficiency leak-proof all-vanadium redox flow battery structure according to claim 1, characterized in that: The surface of the cathode rod (7) is sleeved with a cathode carbon felt (14), and the surface of the anode rod (1) is sleeved with an anode carbon felt (15).

5. The novel high-efficiency leak-proof all-vanadium redox flow battery structure according to claim 2, characterized in that: A connecting rod (16) is fixedly connected to the outer surface of the cathode outer frame (10), and a separating contact plate (17) is fixedly connected to the side of the connecting rod (16) away from the cathode outer frame (10).

6. The novel high-efficiency leak-proof all-vanadium redox flow battery structure according to claim 5, characterized in that: An anti-slip groove is provided on a side of the separating contact plate (17) away from the connecting rod (16), and the separating contact plate (17) is arc-shaped.

7. A new type of high-efficiency, leak-proof all-vanadium liquid flow battery structure, characterized by: The invention comprises a plurality of novel high-efficiency leak-proof all-vanadium liquid flow battery structures as described in any one of claims 1 to 6 connected in parallel, and further comprises a cathode outer frame (10), the inner cavity of the cathode outer frame (10) is fixedly connected to an anode rod (1), the surface of the cathode outer frame (10) is sleeved with a tubular membrane (13), the outer side of the tubular membrane (13) is fixedly connected to an anode electrolyte discharge pipe (3), the inner cavity of the cathode outer frame (10) is fixedly connected to a cathode rod (7), the rear side of the cathode outer frame (10) is fixedly connected to a cathode electrolyte discharge pipe (9), and the side of the cathode outer frame (10) away from the cathode electrolyte discharge pipe (9) is fixedly connected to an anode electrolyte inlet pipe (11).

8. The novel high-efficiency, leak-proof all-vanadium liquid flow battery structure according to claim 7, characterized in that: There are a plurality of cathode rods (7), and the plurality of cathode rods (7) are fixedly mounted in the inner cavity of the cathode outer frame (10). The plurality of cathode rods (7) are evenly distributed around the tubular membrane (13).

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