Double-zone isolation structure of zinc-bromine flow battery integrated liquid storage container

Abstract

The utility model discloses zinc bromine liquid flow battery integrated liquid storage container double -area isolation structure relates to zinc bromine liquid flow battery technical field. Including the box, the middle part symmetrical of box is equipped with the baffle, and the middle part of box is closed and isolated as the bromine resistance chamber by the baffle, and the both sides of box are closed and isolated as zinc electrolyte chamber and bromine electrolyte chamber by the baffle, and the bromine resistance chamber is longitudinally equipped with a plurality of even setting's tubular ceramic ultrafiltration membrane cylinder. The bromine electrolyte in the bromine resistance chamber is filtered through the tubular ceramic ultrafiltration membrane cylinder, enters the zinc electrolyte chamber through the flow -through port, to this realizes the water level balance in the box, and the bromine complex enriched in the tubular ceramic ultrafiltration membrane cylinder is backflowed into the bottom of bromine electrolyte chamber through the backflow pipe, and the tubular ceramic ultrafiltration membrane cylinder and constant pressure cooperation can prevent bromine complex from entering zinc electrolyte and reacting, and then reduce the battery efficiency and produce heat.

Description

Technical Field

[0001] This utility model relates to the field of zinc-bromine flow battery technology, specifically to a dual-zone isolation structure for an integrated liquid storage container in a zinc-bromine flow battery. Background Technology

[0002] The electrolyte storage tank is an important component of the zinc-bromine flow battery. It is equipped with an electrolyte delivery pump and piping assembly on the outside, and internally contains functional piping extending into the tank. During operation, the electrolyte is drawn from the storage tank by the electrolyte delivery pump and transported to the fuel cell stack for electrochemical reaction. After the reaction, the liquid returns to the storage tank through the return pipeline, thus creating a complete electrolyte circulation system.

[0003] Patent document CN222775335U discloses an integrated storage tank based on a zinc-bromine flow battery, belonging to the field of zinc-bromine flow batteries. It includes a storage tank shell, a storage tank cover, a zinc-side piping assembly, and a bromine-side piping assembly. The storage tank shell has a separator plate that divides the storage tank into two independent spaces: a zinc-side storage tank and a bromine-side storage tank. An overflow port is located at the upper end of the separator plate. The zinc-side piping assembly and the bromine-side piping assembly are mounted on the storage tank cover, and downward-extending pipes are located on the back of the cover. This invention replaces rotational molding with injection molding, allowing for the injection molding of the downward-extending pipes within the tank. Furthermore, injection molding improves dimensional accuracy and facilitates subsequent automated assembly.

[0004] Although the aforementioned patent can achieve liquid level balance in the storage tank shell, it lacks the necessary filtration structure, which allows bromine complexes to mix into the zinc electrolyte, causing an exothermic reaction between zinc and bromine. This exothermic reaction not only reduces the battery's power generation efficiency, but the heat released by the reaction can also easily cause a fire hazard.

[0005] Therefore, we have made improvements to this by proposing a dual-zone isolation structure for the integrated liquid storage container of zinc-bromine flow batteries. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a dual-zone isolation structure for an integrated liquid storage container in a zinc-bromine flow battery. This solves the problem of the lack of necessary filtration structures in existing technologies, which leads to an exothermic reaction between zinc and bromine, reducing the battery's power generation efficiency and posing a significant safety hazard.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a dual-zone isolation structure for an integrated liquid storage container for zinc-bromine flow batteries, including a box body, with partitions symmetrically arranged longitudinally in the middle of the box body, the partitions sealing and isolating the middle of the box body into a bromine-blocking chamber, and the partitions sealing and isolating the two sides of the box body into a zinc electrolyte chamber and a bromine electrolyte chamber, with multiple uniformly arranged tubular ceramic ultrafiltration membrane cartridges arranged longitudinally in the bromine-blocking chamber;

[0008] The upper part of the box is closed by a cover plate, and the upper part of the partition is fixedly closed to the cover plate. The upper part of the partition located on the bromine electrolyte chamber side has multiple evenly distributed overflow ports, and the lower middle part of the partition located on the zinc electrolyte chamber side has a flow port.

[0009] The upper part of the cover plate is connected to a pressure gas pipe, which is located in the upper part of the bromine-blocking chamber.

[0010] The upper part of the cover plate is connected to a constant pressure exhaust valve, which is located in the upper part of the zinc electrolyte chamber.

[0011] As a preferred embodiment, the middle part of the bromine-blocking chamber is laterally enclosed by a fixing plate, and the fixing plate has multiple mounting holes evenly arranged with the tubular ceramic ultrafiltration membrane cartridge;

[0012] The bottom of the bromine-blocking chamber is equipped with multiple retaining rings that correspond one-to-one with the mounting holes;

[0013] A fixing plate is fixedly connected to the upper thread of the mounting hole;

[0014] The end of the tubular ceramic ultrafiltration membrane cartridge is inserted into the fixing ring, and the upper end of the tubular ceramic ultrafiltration membrane cartridge is fixed to the fixing plate by the fixing plate.

[0015] As a preferred embodiment, the fixed disk has a through hole in the middle, and the upper end of the tubular ceramic ultrafiltration membrane cartridge is inserted into the through hole.

[0016] As a preferred embodiment, the diameter of the fixing plate is larger than the diameter of the mounting hole, and the outer ring of the fixing plate is threaded with bolts evenly arranged along the axis of the fixing plate. The fixing plate is fixedly and enclosed with the fixing plate by the bolts.

[0017] As a preferred embodiment, the bottom pipe of the fixing ring is connected to a return pipe, and one end of the return pipe is connected to the middle of the side wall of the bromine electrolyte chamber.

[0018] As a preferred embodiment, inclined plates are symmetrically arranged on both sides of the bottom of the zinc electrolyte chamber and the bromine electrolyte chamber.

[0019] As a preferred embodiment, one end of the inclined plate of the zinc electrolyte chamber is fixedly disposed on both sides of the middle part of the zinc electrolyte chamber;

[0020] A rectangular hopper is provided at the bottom center of the bromine electrolyte chamber. The two side walls of the rectangular hopper are fixedly enclosed with the side walls of the bromine electrolyte chamber, and the other two side walls of the rectangular hopper are fixedly enclosed with one end of the inclined plate of the bromine electrolyte chamber.

[0021] As a preferred embodiment, the pressure pipe and return pipe are equipped with solenoid valves.

[0022] As a preferred embodiment, the upper part of the cover plate is connected to a zinc return pipe, which is located at the upper part of the zinc electrolyte chamber, and the bottom middle of the zinc electrolyte chamber is provided with a zinc discharge pipe.

[0023] As a preferred embodiment, the upper part of the cover plate is connected to a bromine return pipe, which is located at the upper part of the bromine electrolyte chamber, and the bottom middle of the bromine electrolyte chamber is provided with a bromine outlet pipe.

[0024] This utility model has the following beneficial effects:

[0025] Zinc electrolyte and bromine electrolyte are injected into the zinc electrolyte chamber and bromine electrolyte chamber respectively through the zinc return pipe and bromine return pipe. Bromine complex activator is added to the bromine electrolyte. The zinc outlet pipe and bromine outlet pipe are connected to a circulation pump. The circulation pump delivers the zinc electrolyte and bromine electrolyte into the battery assembly for reaction and power generation. Due to the water migration effect, the amount of electrolyte water in the bromine electrolyte chamber is greater than that in the zinc electrolyte chamber. The bromine electrolyte in the bromine electrolyte chamber enters the upper part of the bromine barrier chamber through the overflow port.

[0026] Meanwhile, a constant pressure is stably input through the pressure pipe, ensuring a constant pressure in the bromine electrolyte chamber. Under this constant pressure, the bromine electrolyte in the bromine-blocking chamber is filtered through a tubular ceramic ultrafiltration membrane, where bromine complexes are enriched. The filtered bromine electrolyte then enters the zinc electrolyte chamber through the flow port under constant pressure, thus achieving water level balance in the tank.

[0027] Furthermore, the constant gas pressure input can suppress bromine vapor, causing the bromine vapor to form a complex and deposit at the bottom of the bromine electrolyte chamber;

[0028] The bromine complex enriched in the tubular ceramic ultrafiltration membrane cartridge flows back into the bottom of the bromine electrolyte chamber through the reflux tube;

[0029] The combination of tubular ceramic ultrafiltration membrane cartridges and constant pressure can prevent bromine complexes from entering the zinc electrolyte and reacting, thereby reducing battery efficiency and generating heat.

[0030] The constant pressure exhaust valve stably releases the gas pressure in the zinc electrolyte chamber, ensuring that there is always a pressure difference between the zinc electrolyte chamber and the bromine electrolyte chamber, thereby driving the tubular ceramic ultrafiltration membrane cartridge to work.

[0031] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the dual-zone isolation structure of the integrated liquid storage container for the zinc-bromine flow battery of this utility model.

[0033] Figure 2 This is a schematic diagram of the front cross-sectional structure of the dual-zone isolation structure of the integrated liquid storage container for the zinc-bromine flow battery of this utility model;

[0034] Figure 3 This is a top cross-sectional view of the dual-zone isolation structure of the integrated liquid storage container for the zinc-bromine flow battery of this utility model.

[0035] Figure 4 for Figure 2 A magnified structural diagram of part A;

[0036] In the diagram, 1. Box body; 2. Partition plate; 3. Bromine barrier chamber; 4. Zinc electrolyte chamber; 5. Bromine electrolyte chamber; 6. Tubular ceramic ultrafiltration membrane cartridge; 7. Cover plate; 8. Overflow port; 9. Flow port; 10. Pressure gas pipe; 11. Constant pressure exhaust valve; 12. Fixing plate; 13. Mounting hole; 14. Fixing ring; 15. Fixing plate; 16. Through hole; 17. Bolt; 18. Return pipe; 19. Inclined plate; 20. Rectangular hopper; 21. Solenoid valve; 22. Zinc return pipe; 23. Zinc discharge pipe; 24. Bromine return pipe; 25. Bromine discharge pipe. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] Please refer to the examples. Figures 1 to 4This utility model embodiment provides a technical solution: a dual-zone isolation structure for an integrated liquid storage container for zinc-bromine flow batteries, including a box body 1, with partitions 2 longitudinally symmetrically arranged in the middle of the box body 1, the partitions 2 sealing and isolating the middle of the box body 1 into a bromine-blocking chamber 3, and the partitions 2 sealing and isolating the two sides of the box body 1 into a zinc electrolyte chamber 4 and a bromine electrolyte chamber 5, with multiple uniformly arranged tubular ceramic ultrafiltration membrane cartridges 6 longitudinally arranged in the bromine-blocking chamber 3;

[0040] The upper part of the box 1 is closed by the cover plate 7, and the upper part of the partition plate 2 is fixedly closed with the cover plate 7. The upper part of the partition plate 2 located on one side of the bromine electrolyte chamber 5 is provided with multiple evenly distributed overflow ports 8, and the lower middle part of the partition plate 2 located on one side of the zinc electrolyte chamber 4 is provided with a flow port 9.

[0041] The upper part of the cover plate 7 is connected to a pressure pipe 10, which is located in the upper part of the bromine-blocking chamber 3.

[0042] The upper part of the cover plate 7 is connected to a constant pressure exhaust valve 11, which is located on the upper part of the zinc electrolyte chamber 4.

[0043] The middle part of the bromine-blocking chamber 3 is laterally enclosed by a fixing plate 12, and the fixing plate 12 is provided with a plurality of mounting holes 13 evenly arranged with the tubular ceramic ultrafiltration membrane cartridge 6;

[0044] The bottom of the bromine-blocking chamber 3 is provided with multiple fixing rings 14 that correspond one-to-one with the mounting holes 13;

[0045] A fixing plate 15 is fixedly connected to the upper thread of the mounting hole 13;

[0046] The end of the tubular ceramic ultrafiltration membrane cartridge 6 is inserted into the fixing ring 14, and the upper end of the tubular ceramic ultrafiltration membrane cartridge 6 is fixed to the fixing plate 12 by the fixing plate 15.

[0047] The fixed disk 15 has a through hole 16 in the middle, and the upper end of the tubular ceramic ultrafiltration membrane cartridge 6 is inserted into the through hole 16.

[0048] The diameter of the fixed plate 15 is larger than the diameter of the mounting hole 13. The outer ring of the fixed plate 15 is threaded with bolts 17 evenly arranged along the axis of the fixed plate 15. The fixed plate 15 is fixedly and enclosed with the fixed plate 12 by the bolts 17.

[0049] The bottom pipe of the fixed ring 14 is connected to a return pipe 18, and one end of the return pipe 18 is connected to the middle of the side wall of the bromine electrolyte chamber 5.

[0050] The bottom sides of the zinc electrolyte chamber 4 and the bromine electrolyte chamber 5 are symmetrically provided with inclined plates 19.

[0051] One end of the inclined plate 19 of the zinc electrolyte chamber 4 is fixedly installed on both sides of the middle part of the zinc electrolyte chamber 4;

[0052] A rectangular bucket 20 is provided at the bottom center of the bromine electrolyte chamber 5. The two side walls of the rectangular bucket 20 are fixedly and enclosed with the side walls of the bromine electrolyte chamber 5. The other two side walls of the rectangular bucket 20 are fixedly and enclosed with one end of the inclined plate 19 of the bromine electrolyte chamber 5.

[0053] The pressure pipe 10 and return pipe 18 are equipped with solenoid valves 21.

[0054] The upper part of the cover plate 7 is connected to a zinc return pipe 22, which is located at the upper part of the zinc electrolyte chamber 4. The bottom middle of the zinc electrolyte chamber 4 is provided with a zinc discharge pipe 23.

[0055] The upper part of the cover plate 7 is connected to a bromine return pipe 24, which is located at the upper part of the bromine electrolyte chamber 5. The bottom middle of the bromine electrolyte chamber 5 is provided with a bromine outlet pipe 25.

[0056] The working principle of this utility model:

[0057] Zinc electrolyte and bromine electrolyte are injected into zinc electrolyte chamber 4 and bromine electrolyte chamber 5 respectively through zinc return pipe 22 and bromine return pipe 24. Zinc outlet pipe 23 and bromine outlet pipe 25 are connected to circulation pumps, which transport zinc electrolyte and bromine electrolyte into the battery assembly for reaction and power generation. Due to the water migration effect, the amount of electrolyte water in bromine electrolyte chamber 5 is greater than the amount of zinc electrolyte water in zinc electrolyte chamber 4. Bromine electrolyte in bromine electrolyte chamber 5 enters the upper part of bromine barrier chamber 3 through overflow port 8.

[0058] Meanwhile, the pressure pipe 10 stably inputs a constant pressure, ensuring that there is always a constant pressure in the bromine electrolyte chamber 5. Under the action of the constant pressure, the bromine electrolyte in the bromine barrier chamber 3 is filtered through the tubular ceramic ultrafiltration membrane 6, and the bromine complex is enriched in the tubular ceramic ultrafiltration membrane 6. The filtered bromine electrolyte enters the zinc electrolyte chamber 4 through the flow port 9 under the action of constant pressure, thereby achieving water level balance in the tank 1.

[0059] Furthermore, the constant gas pressure input can suppress bromine vapor, causing the bromine vapor to form a complex and deposit at the bottom of the bromine electrolyte chamber 5;

[0060] The bromine complex enriched in the tubular ceramic ultrafiltration membrane cartridge 6 flows back into the bottom of the bromine electrolyte chamber 5 through the reflux pipe 18;

[0061] The combination of tubular ceramic ultrafiltration membrane cartridge 6 and constant pressure can prevent bromine complexes from entering the zinc electrolyte and reacting, thereby reducing battery efficiency and generating heat.

[0062] The constant pressure exhaust valve 11 stably releases the gas pressure in the zinc electrolyte chamber 4, so that there is always a pressure difference between the zinc electrolyte chamber 4 and the bromine electrolyte chamber 5, thereby driving the tubular ceramic ultrafiltration membrane cartridge 6 to work.

[0063] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0064] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A two-zone isolation structure for zinc-bromine flow battery integrated liquid storage container, characterized in that: Includes a box body (1), with partitions (2) symmetrically arranged in the middle of the box body (1) in the longitudinal direction. The partitions (2) enclose and isolate the middle of the box body (1) into a bromine-blocking chamber (3). The partitions (2) enclose and isolate the two sides of the box body (1) into a zinc electrolyte chamber (4) and a bromine electrolyte chamber (5). The bromine-blocking chamber (3) has multiple uniformly arranged tubular ceramic ultrafiltration membrane cartridges (6) in the longitudinal direction. The upper part of the box (1) is closed by a cover plate (7), and the upper part of the partition (2) is fixedly closed with the cover plate (7). The upper part of the partition (2) located on one side of the bromine electrolyte chamber (5) has multiple evenly distributed overflow ports (8), and the lower middle part of the partition (2) located on one side of the zinc electrolyte chamber (4) has a flow port (9). The upper part of the cover plate (7) is connected to a pressure pipe (10), which is located at the upper part of the bromine-blocking chamber (3). The upper part of the cover plate (7) is connected to a constant pressure exhaust valve (11), which is located on the upper part of the zinc electrolyte chamber (4).

2. The dual-zone isolation structure of the zinc-bromine flow battery integrated liquid storage container according to claim 1, characterized in that: The middle part of the bromine-blocking chamber (3) is laterally enclosed by a fixing plate (12), and the fixing plate (12) is provided with a plurality of mounting holes (13) evenly arranged with the tubular ceramic ultrafiltration membrane cartridge (6). The bottom of the bromine-blocking chamber (3) is provided with multiple fixing rings (14) that correspond one-to-one with the mounting holes (13); A fixing plate (15) is fixedly connected to the upper part of the mounting hole (13) by a thread. The end of the tubular ceramic ultrafiltration membrane cartridge (6) is inserted into the fixing ring (14), and the upper end of the tubular ceramic ultrafiltration membrane cartridge (6) is fixed to the fixing plate (12) by the fixing plate (15).

3. The dual-zone isolation structure of the integrated liquid reservoir of a zinc-bromine flow battery according to claim 2, characterized in that: The fixed plate (15) has a through hole (16) in the middle, and the upper end of the tubular ceramic ultrafiltration membrane cartridge (6) is inserted into the through hole (16).

4. The dual-zone isolation structure of the integrated liquid reservoir of a zinc-bromine flow battery according to claim 2, characterized in that: The diameter of the fixed plate (15) is larger than the diameter of the mounting hole (13). The outer ring of the fixed plate (15) is threaded with bolts (17) evenly arranged along the axis of the fixed plate (15). The fixed plate (15) is fixedly and closedly set with the fixed plate (12) by the bolts (17).

5. The dual-zone isolation structure of the integrated liquid reservoir of a zinc-bromine flow battery according to claim 2, characterized in that: The bottom pipe of the fixed ring (14) is connected to a return pipe (18), and one end of the return pipe (18) is connected to the middle of the side wall of the bromine electrolyte chamber (5).

6. The dual-zone isolation structure of the integrated liquid reservoir of a zinc-bromine flow battery according to claim 1, characterized in that: Inclined plates (19) are symmetrically arranged on both sides of the bottom of the zinc electrolyte chamber (4) and the bromine electrolyte chamber (5).

7. The dual-zone isolation structure of the integrated liquid storage container for the zinc-bromine flow battery according to claim 6, characterized in that: One end of the inclined plate (19) of the zinc electrolyte chamber (4) is fixedly set on both sides of the middle part of the zinc electrolyte chamber (4); A rectangular bucket (20) is provided at the bottom center of the bromine electrolyte chamber (5). The two side walls of the rectangular bucket (20) are fixedly enclosed with the side walls of the bromine electrolyte chamber (5). The other two side walls of the rectangular bucket (20) are fixedly enclosed with one end of the inclined plate (19) of the bromine electrolyte chamber (5).

8. The dual-zone isolation structure of the integrated liquid reservoir of a zinc-bromine flow battery according to claim 5, characterized in that: The pressure pipe (10) and return pipe (18) are equipped with solenoid valves (21).

9. The dual-zone isolation structure of the integrated liquid reservoir of a zinc-bromine flow battery according to claim 1, wherein: The upper part of the cover plate (7) is connected to a zinc return pipe (22), which is located at the upper part of the zinc electrolyte chamber (4). The bottom middle of the zinc electrolyte chamber (4) is provided with a zinc discharge pipe (23).

10. The dual-zone isolation structure of the integrated liquid reservoir of a zinc-bromine flow battery according to claim 1, wherein: The upper part of the cover plate (7) is connected to a bromine return pipe (24), which is located at the upper part of the bromine electrolyte chamber (5). The bottom middle of the bromine electrolyte chamber (5) is provided with a bromine discharge pipe (25).

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