Integrated liquid storage barrel based on zinc-bromine flow battery

Abstract

The utility model discloses an integrated liquid storage barrel based on a zinc-bromine flow battery, and belongs to the field of zinc-bromine flow batteries, the integrated liquid storage barrel comprises a liquid storage barrel shell, a liquid storage barrel upper cover, a zinc side pipeline group and a bromine side pipeline group, an isolation plate is arranged in the liquid storage barrel shell, and the liquid storage barrel is divided into two independent spaces, namely a zinc side liquid storage barrel and a bromine side liquid storage barrel, by the isolation plate; an overflow port is formed in the upper end of the isolation plate; the zinc side pipeline group and the bromine side pipeline group are arranged on the upper cover of the liquid storage barrel; a pipeline extending downwards is arranged on the back surface of the upper cover of the liquid storage barrel; a rotational molding processing technology is changed into an injection molding technology, so that the downward extending pipeline in the barrel can be subjected to injection molding; and the injection molding process can improve the size precision, and subsequent automatic assembly is facilitated.

Description

Technical Field

[0001] The invention relates to the field of zinc-bromine liquid flow batteries, and in particular to an integrated liquid storage barrel based on zinc-bromine liquid flow batteries. Background Art

[0002] The liquid storage tank is an important part of the zinc-bromine flow battery. The outside of the liquid storage tank is equipped with an electrolyte delivery pump and pipeline components, and there are functional pipelines extending into the tank inside. When the zinc-bromine flow battery is working, the electrolyte is extracted from the liquid storage tank by the electrolyte delivery pump and transported to the battery stack for electrochemical reaction. After the reaction, the liquid flows back to the liquid storage tank through the return pipeline, and this cycle is repeated to form a complete electrolyte circulation system.

[0003] The zinc-bromine flow battery storage barrel is currently composed of a zinc-side storage barrel assembly and a bromine-side storage barrel assembly. Two electrolyte delivery pumps and complex pipeline assemblies are installed outside the storage barrel. The pipeline assembly is made of pipe fittings made of electrolyte corrosion-resistant materials, which are pre-welded by hot-melt tooling. Then, according to different needs, each pipeline assembly is hot-melted to the zinc-side and bromine-side storage barrels to form a complete liquid supply pipeline. Each pipeline group is connected by an acid- and alkali-resistant hose and locked by a hose clamp. The storage barrel is made of electrolyte corrosion-resistant material according to actual needs, with a wall thickness of about 4-15mm and equipped with a ton barrel cover as a seal.

[0004] Inside the liquid storage barrel, there is not a single chamber, but a plurality of pipes extending downward from the surface of the tank body are connected inside the liquid storage barrel, and these pipes have different functions.

[0005] The above technology has the following disadvantages:

[0006] 1. The structure of the liquid storage barrel assembly is complex

[0007] There are two liquid storage tanks in a single module of zinc-bromine flow battery, which are divided into zinc side liquid storage tank and bromine side liquid storage tank according to different functions. The two have different structures and need to open two sets of molds, which increases the production cost. At the same time, different pipeline components need to be hot-melt welded inside and outside the liquid storage tank to achieve different functions.

[0008] (1) Inside the liquid storage tank: The pipe components extending downward from the surface of the liquid storage tank need to be manually melted, and the difficulties are as follows:

[0009] ① The integral liquid storage barrel has only one barrel mouth with a diameter of 100-200mm. The hot melt welding tools commonly used on the market are large in size and cannot be extended into the barrel for hot melt welding.

[0010] ②The location of hot-melt welding pipelines is relatively scattered and far away from the barrel mouth, which increases the difficulty of welding.

[0011] ③ The field of vision in the barrel is limited, and the human eye cannot observe the hot melt welding situation.

[0012] ④ When hot-melting the pipe fittings through the barrel wall, you first need to customize a joint made of electrolyte corrosion-resistant material. This joint needs to be welded to the pipe extending into the barrel and the liquid storage barrel at the same time, which places very high demands on the technical level of the hot-melt welding workers.

[0013] (2) Outside of the liquid storage tank: Some pipeline components are connected to the outside of the liquid storage tank. These components are pre-made by hot-melt assembly of pipe fittings made of materials resistant to electrolyte corrosion. Some of the pipeline components are fixed to the valve and electrolyte delivery pump by flexible joints, while others are connected by corrosion-resistant hoses + hose clamps to form a pipeline system. Since the connection method is a flexible connection rather than an integrated molding method, it is easy to increase leakage points.

[0014] (3) Complex pipeline components: There are many pipeline components distributed outside the liquid storage tank. Each component is made of 10-25 parts. These parts are manually welded by hot melt tooling. The welding steps are as follows: heat the hot melt tooling to between 250℃-300℃, use the hot melt die head to melt both sides of the pipe to be welded, and then perform plug-in welding. The welding depth is between 10mm-20mm, and the pressure holding time is more than 3s. After all pipeline components are hot-melted, a sealing test is required. Because the structure of the pipeline components is complex and the dimensions require high precision, there are errors during manual production, and the dimensional accuracy cannot be guaranteed. At the same time, the hot melt welding steps are numerous, which increases the labor intensity of workers.

[0015] 2. Manufacturing process limitations

[0016] At present, the liquid storage barrels of zinc-bromine flow batteries in the industry are made by rotational molding, with a rotational molding temperature between 210℃-280℃, a rotational molding time between 20-40 minutes, and a wall thickness of about 4-15mm. Due to the limitations of the rotational molding process, there are the following defects:

[0017] (1) Manual hole drilling is required: When the liquid storage barrel is delivered, the hot-melt welded interface is not in a hole-drilled state and needs to be manually drilled through with a hole expander. After the hole is drilled, debris will fall into the barrel. Due to the structural limitations of the liquid storage barrel, the debris in the barrel is not easy to clean. The remaining debris will enter the battery stack through the pipeline assembly along with the electrolyte. However, the internal structure of the battery stack is complex, which can easily cause flow blockage.

[0018] (2) The internal pipeline is not easy to mold: Because the internal pipeline of the liquid storage tank is too long and the pipeline is close to the inner wall of the liquid storage tank, it is not easy to roll out the pipeline extending downward due to the limitations of the current rotational molding process.

[0019] (3) Increased mold costs: Since the liquid storage barrels are divided into two types, zinc side and bromine side, and the structures of each type of liquid storage barrel are different, it is necessary to make two liquid storage barrel rotational molding molds. In addition, the rotational molding mold has a service life and needs to be re-molded after a certain period of use, which increases the cost.

[0020] (4) The molding time of a single product is long: The rotational molding time of a single product is between 20-40 minutes, which cannot improve production efficiency.

[0021] (5) The dimensional accuracy of the finished product cannot be guaranteed: The size of the rotational molded product is based on the length, and the accuracy is controlled at about ±5mm. This product accuracy is not easy to achieve automated assembly.

[0022] 3. Difficult to maintain

[0023] Since the liquid storage barrel components are mostly made by hot-melt welding, the welding positions are prone to leakage. Once leakage occurs, manual welding is required on the outside of the liquid storage barrel. However, at this time, the liquid storage barrel has been assembled inside the zinc-bromine flow battery energy storage module, and the space is limited, which is not conducive to manual operation.

[0024] 4. The structure of accessories is complex

[0025] During the charging process of the zinc-bromine flow battery, complex bromine is deposited at the bottom of the bromine storage barrel in the bromine side storage barrel. During discharge, the electrolyte delivery pump extracts the complex bromine from the bottom of the storage barrel and delivers it to the battery stack to participate in the reaction. Since the volume of the storage barrel is too large, the complex bromine produced cannot cover the entire bottom of the storage barrel. Therefore, the bottom of the storage barrel cannot be flat, and it needs to be made at an angle greater than 0° to the horizontal ground so that the complex bromine can be collected directly below the complex bromine extraction pipeline for easy extraction. However, the storage barrel is placed inside the sheet metal frame, which requires that the bottom of the sheet metal frame also has an angle greater than 0° to the horizontal ground. When the sheet metal frame is made, the inclined bottom surface is not easy to position, which increases the difficulty of production.

[0026] In view of the above problems, it is urgent to design an integrated liquid storage tank for zinc-bromine flow batteries with simple structure, easy installation and maintenance. Summary of the invention

[0027] In view of the above problems existing in the prior art, the purpose of the present invention is to design an integrated liquid storage barrel for zinc-bromine flow batteries which has a simple structure, is easy to install and maintain, and the liquid storage barrel should reduce the hot melt welding of the liquid storage barrel components, and preferably adopt an easy-to-operate form for installation and fixation, such as screw bolting, etc. At the same time, the rotational molding process should be cancelled and replaced with an injection molding process, so that the pipeline extending downward in the barrel can be injection molded; and the injection molding process can improve the dimensional accuracy and facilitate subsequent automated assembly.

[0028] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an integrated liquid storage barrel based on a zinc-bromine liquid flow battery, comprising a liquid storage barrel shell, a liquid storage barrel upper cover, a zinc side pipeline group and a bromine side pipeline group, an isolation plate is arranged in the liquid storage barrel shell, the isolation plate divides the liquid storage barrel into independent spaces of a zinc side liquid storage barrel and a bromine side liquid storage barrel, and an overflow port is arranged at the upper end of the isolation plate; the zinc side pipeline group and the bromine side pipeline group are arranged on the liquid storage barrel upper cover, and a downwardly extending pipeline is arranged on the back of the liquid storage barrel upper cover.

[0029] As a preferred structure of the present invention, the downwardly extending pipeline includes an electrolyte monitoring pipeline, a zinc-side electrolyte extraction pipeline, a bromine-side electrolyte extraction pipeline and a complex bromine extraction pipeline.

[0030] As a preferred structure of the present invention, the upper cover of the liquid storage barrel is provided with two grooves for holding the zinc side pipeline group and the bromine side pipeline group, and the bottom surface of the groove is provided with a pipeline interface, and the zinc side pipeline group and the bromine side pipeline group are connected to the pipeline extending downward through the pipeline interface, and the pipeline interface includes a flange, a union and a ball valve connection, and the fixing form of the pipeline interface is a bolt connection or a hot melt connection.

[0031] As a preferred structure of the present invention, the zinc side pipeline group includes a zinc side electrolyte delivery pump, a zinc side valve connected to the zinc side electrolyte delivery pump through an anti-corrosion rubber tube, and a zinc side pipeline joint connected to the zinc side valve through a pipeline, and the pipeline is connected to the zinc side electrolyte extraction pipeline.

[0032] As a preferred structure of the present invention, the bromine side pipeline group includes a bromine side electrolyte delivery pump, a bromine side valve, a three-hole electric valve and two bromine side pipeline joints, one end of the bromine side valve is connected to the bromine side electrolyte delivery pump through an anti-corrosion rubber tube, and the other end is connected to one end of the three-hole electric valve, and the other two ends of the three-hole electric valve are respectively connected to the two bromine side pipeline joints through pipelines, one of which is connected to the bromine side electrolyte extraction pipeline, and the other pipeline is connected to the complex bromine extraction pipeline, and the complex bromine extraction pipeline (45) passes through the electrolyte and extends into the complex bromine in the bromine side liquid storage tank. The pipe, pump and valve are all in a bracket-free installation form.

[0033] As a preferred structure of the present invention, the liquid storage barrel is flat-bottomed, and an inclined plate inclined from both sides toward the middle is provided at the bottom of the liquid storage barrel. The inclined plate is fixedly connected to the bottom plate of the liquid storage barrel through a supporting structure, and the angle between the inclined plate and the extension line of the bottom plate of the liquid storage barrel is between 0-30°. A concave cavity for storing complex bromine is provided in the inclined plate, and the concave cavity is located below the complex bromine extraction pipeline.

[0034] As a preferred structure of the present invention, the upper end of the isolation plate is connected to the inner side of the upper cover of the liquid storage barrel.

[0035] As a preferred structure of the present invention, the electrolyte monitoring pipeline, the zinc-side electrolyte extraction pipeline, the bromine-side electrolyte extraction pipeline and the complex bromine extraction pipeline are integrally injection-molded with the upper cover of the liquid storage barrel.

[0036] As a preferred structure of the present invention, the liquid storage barrel shell is sealed and connected to the liquid storage barrel upper cover, and the connection form can be bolt-tightening shell compression sealing ring sealing connection, hot-melt sealing connection, adhesive sealing connection, etc. The liquid storage barrel shell, liquid storage barrel upper cover and isolation plate are all provided with strength reinforcement structure, and the strength reinforcement structure can be reinforcing ribs, etc.

[0037] As a preferred embodiment of the present invention, the manufacturing process is an injection molding process.

[0038] Compared with the prior art, the technical solution disclosed in the present invention has the following beneficial effects:

[0039] 1. Simple structure: The present invention reduces the multiple groups of pipelines in the prior art to two groups, and integrates two independent zinc-side liquid storage tanks and bromine-side liquid storage tanks into a whole, and the structure is much simpler than before.

[0040] 2. Avoiding liquid leakage: The integrated liquid storage barrel of the present invention is integrally formed by injection molding. One barrel has the ability to store both zinc-side and bromine-side electrolytes. It is integrally injection molded, so there is no problem of liquid leakage.

[0041] 3. Saving of assembly time: The present invention reduces the production steps of the pipeline components, reduces the number of pipeline components, and adopts the injection molding process for one-piece molding, thereby reducing the assembly time.

[0042] 4. Conducive to automation: Since the injection molding dimensional accuracy of the present invention can be controlled within plus or minus 0.2 mm, the present invention can be used for automated assembly.

[0043] 5. Accelerated production cycle: The present invention cancels the original rotational molding process and adopts injection molding, which shortens the molding time and reduces the production cycle of a single product.

[0044] 6. Easy to repair and maintain: The present invention optimizes the number and structure of pipeline components, and can pre-assemble some pipeline components into a whole, which can be assembled in a modular manner. When replacing the corresponding accessories, you only need to close some valves to prevent the electrolyte from flowing out of the pipeline, and then you can take away some components for repair or replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic diagram of the structure of the integrated liquid storage tank based on the zinc-bromine flow battery in this embodiment.

[0046] Figure 2 Schematic diagram of the internal structure of the integrated liquid storage barrel shell in this embodiment.

[0047] Figure 3 Schematic diagram of the internal piping of the integrated liquid storage barrel in this embodiment.

[0048] Figure 4 Schematic diagram of the structure of the external pipeline assembly of the integrated liquid storage barrel in this embodiment.

[0049] Figure 5 Schematic diagram of the integrated liquid storage barrel upper cover structure in this embodiment.

[0050] Figure 6 It is a schematic cross-sectional view of the integrated liquid storage barrel shell in this embodiment.

[0051] Among them, 1 is the liquid storage barrel shell; 2 is the liquid storage barrel upper cover; 3 is the zinc side pipeline group; 4 is the bromine side pipeline group; 5 is the isolation plate; 6 is the zinc side liquid storage barrel; 7 is the bromine side liquid storage barrel; 8 is the electrolyte monitoring pipeline; 9 is the inclined plate; 10 is the concave cavity;

[0052] 21 is the zinc side liquid injection port; 22 is the bromine side liquid injection port; 23 is the zinc side sealing cover; 24 is the bromine side sealing cover; 25-27 are pipeline interfaces;

[0053] 31 is a zinc side electrolyte delivery pump; 32 is a zinc side valve; 33 is a zinc side electrolyte extraction pipeline;

[0054] 41 is the electrolyte delivery pump on the bromine side; 42 is the bromine side valve; 43 is the three-hole electric valve; 44 is the electrolyte extraction pipeline on the bromine side; 45 is the complex bromine extraction pipeline; 51 is the overflow port. DETAILED DESCRIPTION

[0055] In order to explain the technical content, structural features, achieved objectives and effects of the technical solution in detail, the following is a detailed description in conjunction with specific embodiments and accompanying drawings.

[0056] This embodiment combines the shortcomings of current zinc-bromine liquid flow battery liquid storage barrel products, optimizes the product structure, manufacturing process, and repair and maintenance, and redesigns an integrated zinc-bromine liquid flow battery liquid storage barrel.

[0057] like Figure 1-2 As shown, the optimized liquid storage barrel is an integrated liquid storage barrel, including a liquid storage barrel shell 1, a liquid storage barrel upper cover 2, a zinc side pipeline group 3 and a bromine side pipeline group 4, an isolation plate 5 is arranged in the liquid storage barrel shell 1, the isolation plate 5 divides the liquid storage barrel into a zinc side liquid storage barrel 6 and a bromine side liquid storage barrel 7, and an overflow port 51 is arranged at the upper end of the isolation plate 5; the zinc side pipeline group 3 and the bromine side pipeline group 4 are arranged above the liquid storage barrel upper cover 2, and a pipeline extending downward is arranged on the back of the liquid storage barrel upper cover 2.

[0058] As a preferred structure of this embodiment, a partition plate 5 is designed inside a liquid storage barrel, and strength reinforcement structures are provided on both sides of the partition plate 5 to ensure that the partition plate will not deform or fail when the liquid volume on both sides is inconsistent. The partition plate 5 is integrally injection molded to ensure that the two spaces of the liquid storage barrel divided by the partition plate 5 will not have liquid leakage to each other. The partition plate 5 is arranged between the two grooves of the liquid storage barrel upper cover 2, and the upper end of the partition plate 5 is connected to the inner side of the liquid storage barrel upper cover 2. At the uppermost end of the partition plate 5, an overflow port 51 is provided. Because zinc-bromine liquid flow batteries may migrate liquid during actual use, when one side of the liquid storage barrel is full, it is easy to cause the pump pressure to increase. At this time, an overflow port is needed to balance the volume between the two liquid storage barrels.

[0059] like Figure 3 As shown, as a preferred structure of this embodiment, the pipelines extending downward from the liquid storage barrel upper cover 2 include an electrolyte monitoring pipeline 8, a zinc side electrolyte extraction pipeline 33, a bromine side electrolyte extraction pipeline 44 and a complex bromine extraction pipeline 45.

[0060] like Figure 3 and Figure 5 As shown, as a preferred structure of this embodiment, the liquid storage barrel upper cover 2 is provided with two grooves for holding the zinc side pipeline group 3 and the bromine side pipeline group 4, and the bottom surface of the groove is provided with pipeline interfaces 25, 26, and 27, and the zinc side pipeline group 3 and the bromine side pipeline group 4 are connected to the pipeline extending downward through the pipeline interfaces. The liquid storage barrel upper cover 2 is also provided with a zinc side injection port 21 and a bromine side injection port 22 for injecting electrolyte, and the zinc side injection port 21 and the bromine side injection port 22 are respectively provided with a zinc side sealing cover 23 and a bromine side sealing cover 24. The pipeline interface can be a flange, a flexible joint, a ball valve connection, etc., and the fixing form of the pipeline interface can be a bolt connection or a hot melt connection, etc.

[0061] like Figure 3 As shown, as a preferred structure of the present embodiment, the pipeline assembly inside the integrated liquid storage barrel is molded at one time on one side of the liquid storage barrel upper cover 2: the pipeline assembly originally extending deep into the liquid storage barrel is optimized and directly injection molded on the inner side of the upper cover of the integrated liquid storage barrel, eliminating the trouble of manual hot-melt welding. At the same time, the opening of the liquid storage barrel pipeline group is directly made during the one-time molding, without the need for manual drilling, and there will be no debris, thus avoiding the risk of debris entering the battery stack and clogging the flow channel.

[0062] like Figure 4-5As shown, as a preferred structure of this embodiment, the zinc side pipeline group 3 includes a zinc side electrolyte delivery pump 31, a zinc side valve 32 connected to the zinc side electrolyte delivery pump 31 through an anti-corrosion rubber tube, and a zinc side pipeline joint connected to the zinc side valve 32 through a pipeline, and the pipeline is connected to the zinc side electrolyte extraction pipeline 33, and the zinc side electrolyte extraction pipeline 33 needs to extend into the electrolyte in the zinc side liquid storage tank.

[0063] The bromine side pipeline group 4 includes a bromine side electrolyte delivery pump 41, a bromine side valve 42, a three-hole electric valve 43 and two bromine side pipeline joints. One end of the bromine side valve 42 is connected to the bromine side electrolyte delivery pump 41 through an anti-corrosion rubber tube, and the other end is connected to one end of the three-hole electric valve 43. The other two ends of the three-hole electric valve 43 are respectively connected to the two bromine side pipeline joints through pipelines, one of which is connected to the bromine side electrolyte extraction pipeline 44, and the other pipeline is connected to the complex bromine extraction pipeline 45. The complex bromine extraction pipeline 45 passes through the electrolyte and extends into the complex bromine in the bromine side liquid storage tank.

[0064] As a preferred structure of this embodiment, the pipes, pumps and valves in the zinc side pipeline group 3 and the bromine side pipeline group 4 are all installed and fixed without a bracket.

[0065] As a preferred structure of this embodiment, the pipeline components that need to be hot-melt welded on the outside are optimized, and pipeline joints are used instead. The original hot-melt pipeline joints are cancelled, and a pipeline interface is designed on the barrel cover. A nut assembly is pre-buried inside the pipeline interface during injection molding, so that the joint can be connected with other pipelines. Because the joint is equipped with a sealing ring inside, and the pipeline joint is bolted by screws, it is not easy to loosen or leak. At the same time, the number of pipeline components is changed from multiple to 2, and each pipeline group is equipped with a valve, which can be quickly replaced.

[0066] like Figure 6 As shown, at the bottom of the liquid storage barrel, a concave cavity 10 is designed to store complex bromine alone, and the pipeline for extracting complex bromine is directly inserted into the concave cavity 10. The liquid storage barrel shell 1 is a square structure with a flat bottom and an inclined plate 9 with an angle of 0-30 to the ground. In this way, the bottom of the sheet metal frame supporting the liquid storage barrel can also be made into a flat bottom, without welding a slope separately, reducing the difficulty of processing the sheet metal frame.

[0067] This embodiment cancels the original rotational molding process and replaces it with an injection molding process. The injection molding process has the following advantages over the rotational molding process:

[0068] The special-shaped structure is easy to make: the original liquid storage barrel is changed into a liquid storage barrel shell + cover form, the liquid storage barrel shell and the cover are respectively realized by injection molding process, and the connection mode of the cover and the liquid storage barrel shell can be realized by screw bolt connection, hot melt sealing, adhesive sealing and other methods.

[0069] One-time molding of the internal extension pipeline structure: Due to the limitations of process technology, some structures cannot be produced by rotational molding, but the injection molding process can achieve this requirement. Injection molding has a screw to transport materials, and the modified plastic particles can be heated and transported to the inside of the mold cavity to form the required structure, which can realize the molding of many complex structures.

[0070] High dimensional accuracy: The injection molding process can improve the dimensional accuracy of the product. Depending on the size and structure of the product, the injection molding accuracy is between ±1mm and ±0.02mm.

[0071] Save materials: While ensuring that the product meets the technical requirements, the wall thickness of the product can be selected according to the actual situation to avoid the waste of materials caused by the large wall thickness of rotational molding.

[0072] Improved product manufacturing efficiency: Since the temperature of the injection mold is between 30℃-50℃ and the injection time is between tens of seconds and hundreds of seconds, less than half an hour, the production efficiency can be improved.

[0073] Easy to achieve automation: At present, factories often introduce automated assembly equipment to achieve industrial efficiency. The product size is highly accurate, which is conducive to automated assembly.

[0074] It should be noted that, although the above embodiments have been described in this article, the patent protection scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, changes and modifications made to the embodiments described herein, or equivalent structures or equivalent process changes made using the contents of the present invention specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present invention.

Claims

1. An integrated liquid storage tank based on zinc-bromine flow battery, characterized in that: The invention comprises a liquid storage barrel shell (1), a liquid storage barrel upper cover (2), a zinc side pipeline group (3) and a bromine side pipeline group (4); the liquid storage barrel shell (1) is provided with an isolation plate (5), the isolation plate (5) divides the liquid storage barrel into a zinc side liquid storage barrel (6) and a bromine side liquid storage barrel (7); an overflow port (51) is provided at the upper end of the isolation plate (5); the zinc side pipeline group (3) and the bromine side pipeline group (4) are arranged above the liquid storage barrel upper cover (2); and a pipeline extending downward is provided on the back of the liquid storage barrel upper cover (2).

2. The integrated liquid storage tank based on zinc-bromine flow battery according to claim 1 is characterized in that: The pipelines extending downwards include an electrolyte monitoring pipeline (8), a zinc-side electrolyte extraction pipeline (33), a bromine-side electrolyte extraction pipeline (44) and a complex bromine extraction pipeline (45).

3. The integrated liquid storage tank based on zinc-bromine flow battery according to claim 2 is characterized in that: The liquid storage barrel upper cover (2) is provided with two grooves for containing the zinc side pipeline group (3) and the bromine side pipeline group (4), and the bottom surface of the groove is provided with a pipeline interface, and the zinc side pipeline group (3) and the bromine side pipeline group (4) are connected to the pipeline extending downward through the pipeline interface, and the pipeline interface includes a flange, a flexible joint and a ball valve connection, and the fixing form of the pipeline interface is a bolt connection or a hot melt connection.

4. The integrated liquid storage tank based on zinc-bromine flow battery according to claim 2 is characterized in that: The zinc side pipeline group (3) comprises a zinc side electrolyte delivery pump (31), a zinc side valve (32) connected to the zinc side electrolyte delivery pump (31) via an anti-corrosion rubber tube, and a zinc side pipeline joint connected to the zinc side valve (32) via a pipeline, wherein the pipeline is connected to the zinc side electrolyte extraction pipeline (33).

5. The integrated liquid storage tank based on zinc-bromine flow battery according to claim 2, characterized in that: The bromine side pipeline group (4) comprises a bromine side electrolyte delivery pump (41), a bromine side valve (42), a three-hole electric valve (43) and two bromine side pipeline joints. One end of the bromine side valve (42) is connected to the bromine side electrolyte delivery pump (41) through an anti-corrosion rubber tube, and the other end is connected to one end of the three-hole electric valve (43). The other two ends of the three-hole electric valve (43) are respectively connected to the two bromine side pipeline joints through pipelines, one of which is connected to the bromine side electrolyte extraction pipeline (44), and the other is connected to the complex bromine extraction pipeline (45). The complex bromine extraction pipeline (45) passes through the electrolyte and extends into the complex bromine in the bromine side liquid storage tank.

6. The integrated liquid storage tank based on zinc-bromine flow battery according to claim 1, characterized in that: The liquid storage barrel is flat-bottomed, and an inclined plate (9) is provided at the bottom of the liquid storage barrel, which is inclined from both sides toward the middle. The inclined plate (9) is fixedly connected to the bottom plate of the liquid storage barrel through a supporting structure, and the angle between the inclined plate (9) and the extension line of the bottom plate of the liquid storage barrel is between 0 and 30 degrees. A concave cavity (10) for storing complex bromine is provided in the inclined plate (9), and the concave cavity (10) is located below the complex bromine extraction pipeline (45).

7. The integrated liquid storage tank based on zinc-bromine flow battery according to claim 1, characterized in that: The upper end of the isolation plate (5) is connected to the inner side of the upper cover (2) of the liquid storage barrel.

8. The integrated liquid storage tank based on zinc-bromine flow battery according to claim 2 is characterized in that: The electrolyte monitoring pipeline (8), the zinc-side electrolyte extraction pipeline (33), the bromine-side electrolyte extraction pipeline (44) and the complex bromine extraction pipeline (45) are integrally injection-molded with the upper cover (2) of the liquid storage barrel.

9. The integrated liquid storage tank based on zinc-bromine flow battery according to claim 1, characterized in that: The liquid storage barrel shell (1) is integrally injection molded, and the liquid storage barrel shell (1) is sealedly connected to the liquid storage barrel upper cover (2), including bolt-tightening shell compression seal ring sealing connection, hot-melt sealing connection and adhesive sealing connection. The liquid storage barrel shell (1), the liquid storage barrel upper cover (2) and the isolation plate (5) are all provided with strength reinforcement structures.

10. An integrated liquid storage tank based on zinc-bromine flow battery according to any one of claims 1 to 9, characterized in that: The manufacturing process is injection molding.

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