Small chamber structure and all-vanadium redox flow battery

Abstract

The utility model provides a small chamber structure, an all-vanadium redox flow battery and a bipolar plate chamber, the bipolar plate chamber comprises a bipolar plate, a cathode chamber and an anode chamber, and opposite sides of a cathode frame plate of the cathode chamber and an anode frame plate of the anode chamber are respectively connected with the bipolar plate in a sealing manner; the cathode frame plate and the anode frame plate are both provided with the positioning grooves, the bipolar plate is provided with the positioning protrusions, and the positioning protrusions are connected with the positioning grooves in an embedded mode, so that the assembly precision of the bipolar plate is improved. The cathode frame plate and the anode frame plate are respectively provided with a potential test hole used for exposing the bipolar plate or leading out a copper wire, so that potential measurement can be conveniently carried out by using a universal meter and other measuring tools, and real-time monitoring can be carried out by leading out the copper wire to be externally connected with a voltage sensor, thereby accurately diagnosing and monitoring the operation state of the reactor. And corresponding parameters are properly adjusted, so that high energy efficiency, inherent long cycle life and high safety of the all-vanadium redox flow battery structure are realized.

Description

Technical Field

[0001] This utility model relates to the field of electrochemical energy storage technology, and in particular to a small chamber structure and an all-vanadium redox flow battery. Background Technology

[0002] Existing energy storage devices, such as lead-acid batteries and lithium-ion batteries, suffer from problems such as low energy density, short cycle life, high cost, and poor safety. In contrast, vanadium redox flow batteries, as a novel energy storage technology, offer advantages such as high energy conversion efficiency, long cycle life, relatively low cost, and high safety.

[0003] The applicant has discovered that the prior art has at least the following technical problems:

[0004] To accommodate the installation requirements of bipolar plates, the existing vanadium redox flow battery structure requires the outer dimensions of the bipolar plates to be smaller than the corresponding dimensions on the anode and cathode frames. However, this size mismatch increases assembly difficulty and makes the bipolar plates more prone to misalignment during assembly. Especially in multi-compartment battery assembly, bipolar plate misalignment can lead to inaccurate positioning, resulting in inaccurate potential measurements, or even the inability to measure potential at all.

[0005] For example, CN202010138130.7 discloses a three-chamber electrochemical reactor.

[0006] In view of the above, this utility model is hereby proposed. Utility Model Content

[0007] The purpose of this invention is to provide a small-cell structure and a vanadium redox flow battery to address the shortcomings of existing bipolar plate assembly structures with anode and cathode frames. These structures lack corresponding positioning components, leading to bipolar plate misalignment during assembly, making precise positioning difficult and resulting in inaccurate potential measurements, or even the inability to measure potential at all. The preferred technical solutions provided by this invention offer numerous technical advantages, which are detailed below.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] This utility model provides a small chamber structure, including a bipolar plate chamber, which comprises a bipolar plate, a cathode chamber, and an anode chamber. The opposite sides of the cathode frame plate of the cathode chamber and the anode frame plate of the anode chamber are respectively sealed to the bipolar plate. Both the cathode frame plate and the anode frame plate are provided with positioning grooves, and the bipolar plate is provided with positioning protrusions, which are fitted and connected to the positioning grooves. Both the cathode frame plate and the anode frame plate are provided with potential test holes for exposing the bipolar plate or leading out copper wires.

[0010] Preferably, there are two sets of positioning protrusions, which are symmetrically arranged on both sides of the bipolar plate; the positioning groove is provided corresponding to the positioning protrusion.

[0011] Preferably, the positioning protrusion has a potential groove, and the potential test hole is connected to the potential groove through the positioning groove.

[0012] Preferably, the positioning protrusion is provided with a first engagement portion, and the positioning groove is provided with a second engagement portion, wherein the first engagement portion and the second engagement portion are fitted together.

[0013] Preferably, the anode frame plate and the cathode frame plate are respectively sealed to the bipolar plate through a first sealing gasket.

[0014] Preferably, a plurality of anode chamber inlets are provided on one side of the anode frame plate, and a plurality of anode chamber outlets are provided on the other side. The anode chamber inlets and the anode chamber outlets are both connected to the flow field of the anode frame plate and form a Z-shaped flow pattern.

[0015] The cathode frame plate has multiple cathode chamber inlets on one side and multiple cathode chamber outlets on the other side. Both the cathode chamber inlets and outlets are connected to the flow field of the cathode frame plate and form a Z-shaped flow pattern.

[0016] Preferably, the anode frame plate is provided with a plurality of anode through holes, and the cathode frame plate is provided with a plurality of cathode through holes, wherein the anode through holes and the cathode through holes are provided correspondingly.

[0017] Preferably, an all-vanadium redox flow battery includes a chamber structure as described above.

[0018] The preferred technical solution of this utility model can also produce at least the following technical effects:

[0019] This invention effectively avoids the defects in the existing assembly structure design of bipolar plates with anode and cathode frames, which lack corresponding positioning components. During assembly, the bipolar plates are prone to positional shifts, making precise positioning difficult and leading to inaccurate potential measurements, or even the inability to measure potential at all. This invention provides a chamber structure including a bipolar plate chamber comprising a bipolar plate, a cathode chamber, and an anode chamber. The opposite sides of the cathode frame in the cathode chamber and the anode frame in the anode chamber are sealed to the bipolar plate, while the other sides of the cathode and anode frames are sealed to an ion-exchange membrane. Positioning grooves are provided on both the cathode and anode frames, and positioning protrusions are provided on the bipolar plates, which engage with the positioning grooves. Potential testing holes are provided on both the cathode and anode frames to expose the bipolar plate or to lead out copper wires. This invention improves the assembly precision of the bipolar plates by setting positioning grooves on the cathode and anode frame plates and providing matching positioning protrusions on the bipolar plates. This ensures accurate positioning of the bipolar plates during assembly, preventing measurement errors caused by positional misalignment. Furthermore, the potential test holes on the cathode and anode frame plates directly expose the bipolar plates, facilitating potential measurement using multimeters and other measuring tools. Real-time monitoring via external voltage sensors connected to copper wires allows for understanding the uniformity of the internal flow field distribution and the suitability of electrode selection. Real-time monitoring data enables accurate diagnosis and monitoring of the reactor's operating status, allowing for appropriate parameter adjustments and achieving the high energy efficiency, inherent long cycle life, and high safety of the all-vanadium redox flow battery structure. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a bipolar plate chamber with a small chamber structure provided by this utility model;

[0022] Figure 2 This is a schematic diagram of the cathode frame plate and bipolar plate of a small chamber structure provided by this utility model;

[0023] Figure 3 This is a schematic diagram of the anode frame plate and bipolar plate of a small chamber structure provided by this utility model;

[0024] Figure 4This is a schematic diagram of the structure of a cathode frame plate with a small chamber structure provided by this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of an anode frame plate with a small chamber structure provided by this utility model;

[0026] Figure 6 This is a schematic diagram of the structure of an all-vanadium redox flow battery provided by this utility model;

[0027] Figure 7 This is a schematic diagram of the structure of the cathode carbon plate, cathode current collector plate and cathode insulating end plate of a vanadium redox flow battery provided by this utility model.

[0028] In the picture:

[0029] 1. Bipolar plate; 101. Positioning protrusion; 1011. Engaging protrusion; 1012. Potential groove; 2. Ion membrane; 3. Cathode frame plate; 301. Cathode positioning groove; 3011. Cathode engagement groove; 302. Cathode potential test hole; 303. Cathode sealing groove; 304. Cathode chamber inlet; 305. Cathode chamber outlet; 306. Cathode through hole; 4. Anode frame plate; 401. Anode positioning groove; 4011. Anode engagement groove 402. Anode potential test hole; 403. Anode sealing groove; 404. Anode chamber inlet; 405. Anode chamber outlet; 406. Anode through hole; 5. Cathode electrode; 6. Anode electrode; 7. First sealing gasket; 8. Second sealing gasket; 9. Cathode current collector; 10. Anode current collector; 11. Cathode insulating end plate; 1101. Cathode mounting groove; 12. Anode insulating end plate; 13. Cathode carbon plate; 14. Anode carbon plate. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] Example 1:

[0032] like Figures 1-5As shown, this utility model provides a small chamber structure, including a bipolar plate chamber, which includes a bipolar plate 1, a cathode chamber, and an anode chamber. The opposite sides of the cathode frame plate 3 of the cathode chamber and the anode frame plate 4 of the anode chamber are respectively sealed to the bipolar plate 1, and the other sides of the cathode frame plate 3 and the anode frame plate 4 are respectively sealed to the ion membrane 2. Positioning grooves are provided on both the cathode frame plate 3 and the anode frame plate 4, and positioning protrusions 101 are provided on the bipolar plate 1, which are fitted and connected to the positioning grooves. Potential testing holes are provided on both the cathode frame plate 3 and the anode frame plate 4 for exposing the bipolar plate 1 or leading out copper wires.

[0033] Furthermore, one side of the cathode frame plate 3 is connected to the ion membrane 2 via the second sealing gasket 8, and the other side is connected to the bipolar plate 1 via the first sealing gasket 7. The cathode electrode 5 is placed inside the cathode frame, thereby forming a cathode chamber. When the other side of the cathode frame plate 3 is at the cathode end, it is connected to the cathode carbon plate 13.

[0034] One side of the anode frame plate 4 is connected to the ion exchange membrane 2, and the other side is connected to one side of the bipolar plate 1 through the first sealing gasket 7. The anode electrode 6 is placed inside the anode frame plate 4, thereby forming an anode chamber. When the other side of the anode frame plate 4 is at the anode end, it is connected to the anode carbon plate 14.

[0035] like Figure 2 , Figure 3 As shown, the cathode frame plate 3 and the anode frame plate 4 have the same structure. By setting cathode positioning grooves 301 and anode positioning grooves 401 on the cathode frame plate 3 and the anode frame plate 4 respectively, and setting positioning protrusions 101 that fit into them on the bipolar plate 1, the assembly accuracy of the bipolar plate 1 is improved, so as to achieve precise positioning of the bipolar plate 1, ensure the positional accuracy of the bipolar plate 1 during the assembly process, and avoid measurement errors caused by positional offset.

[0036] Furthermore, the cathode potential test holes 302 and anode potential test holes 402 respectively set on the cathode frame plate 3 and anode frame plate 4 directly expose the bipolar plates 1. A multimeter probe can be inserted through the potential test holes to measure the potential difference between any two cathode and anode electrodes, i.e., the total potential between any two cathode and anode electrodes. Real-time monitoring can also be performed by connecting an external voltage sensor via a copper wire to understand the uniformity of the internal flow field distribution and the suitability of the electrode selection. The potential of each individual reactor in the battery can be accurately measured in real time to accurately diagnose and monitor the reactor's operating status and appropriately adjust the corresponding parameters, achieving the high energy efficiency, inherent long cycle life, and high safety of the all-vanadium redox flow battery structure.

[0037] Existing vanadium redox flow battery structures suffer from drawbacks such as low single-cell power, large reaction area, and the potential inhomogeneity of individual cells in multi-cell batteries, leading to energy loss and even affecting battery life. This invention addresses these drawbacks by utilizing the synergistic effect of bipolar plates 1, anode frame plate 4, cathode frame plate 3, and potential testing holes. Real-time, online monitoring of the potential within the bipolar plate chambers (i.e., individual cells) allows for assessment of the overall battery structure's uniformity, as well as the rationality of the internal flow field design of the anode frame plate 4 and cathode frame plate 3, and the selection of the electrode catalyst layer. Furthermore, real-time, online monitoring of the cell potential provides a basis and guidance for optimizing battery operation process parameters, determining optimal pressure, temperature, flow rate, and other parameters.

[0038] As an optional implementation, there are two sets of positioning protrusions 101, which are symmetrically arranged on both sides of the bipolar plate 1; the positioning groove is provided corresponding to the positioning protrusions 101.

[0039] Furthermore, the positioning protrusion 101 is approximately 1 cm long. This design allows the positioning protrusion 101 to be securely embedded in the positioning groove, thereby forming a stable connection between the bipolar plate 1 and the cathode frame plate 3 and the anode frame plate 4.

[0040] like Figure 2 , Figure 3 As shown, two sets of symmetrically arranged positioning protrusions 101 are respectively connected to the cathode positioning groove 301 and the anode positioning groove 401 to enable the bipolar plate 1 to be accurately embedded between the cathode frame plate 3 and the anode frame plate 4, thereby improving the assembly accuracy of the bipolar plate 1, ensuring the positional accuracy of the bipolar plate 1 during the assembly process, avoiding measurement errors caused by positional offset, and also improving the stability and reliability of the connection between the bipolar plate 1 and the cathode frame plate 3 and the anode frame plate 4.

[0041] As an optional implementation, a potential groove 1012 is provided on the positioning protrusion 101, and the potential test hole is connected to the potential groove 1012 through the positioning groove.

[0042] Furthermore, such as Figure 2 , Figure 3 As shown, the positioning protrusion 101 is positioned at the corresponding cathode potential test hole 302 and anode potential test hole 402. When the positioning protrusion 101 is embedded in the positioning groove, the potential groove 1012 will align and connect with the cathode potential test hole 302 or the anode potential test hole 402, forming a direct measurement channel.

[0043] The design of the potential groove 1012 increases the contact area between the measuring tool and the bipolar plate 1, making it easier to measure the potential. The measuring tool can directly enter the potential groove 1012 through the potential test hole and form a tight contact with the bipolar plate 1, improving the accuracy of the measurement.

[0044] The design of the cathode potential test hole 302, anode potential test hole 402, and potential groove 1012 needs to easily accommodate the probe of a multimeter, thereby enabling direct measurement of the potential difference between any two cathode and anode electrodes, i.e., the total potential between any two cathode and anode electrodes. Furthermore, the design of the cathode potential test hole 302, anode potential test hole 402, and potential groove 1012 also needs to easily accommodate a thin copper wire, which can extend approximately 1 cm beyond the corresponding cathode frame plate 3 and anode frame plate 4, facilitating the connection of an external voltage sensor for real-time monitoring of the chamber voltage.

[0045] This invention provides a chamber structure that allows for real-time assessment of the performance of a vanadium redox flow battery, both during battery design and development and during long-term operation. In the design and development of the electrochemical reactor, the chamber voltage monitoring function can determine the rationality of the flow field design of the anode frame 4 and cathode frame 3, and whether the electrode selection is optimal. During battery operation, the chamber voltage monitoring function can determine whether the anode and cathode liquid input flow rates are appropriate, and whether the electrolyte temperature is suitable. Adjustments and improvements ensure optimal battery operation.

[0046] As an optional implementation, the positioning protrusion 101 is provided with a first engagement portion, and the cathode positioning groove 301 and the anode positioning groove 401 are both provided with a second engagement portion, and the first engagement portion and the second engagement portion are fitted together.

[0047] Furthermore, the first engagement portion includes a plurality of engagement protrusions 1011, and a recessed portion between two intermediate engagement protrusions 1011 forms a potential groove 1012. The second engagement portion of the cathode positioning groove 301 includes a plurality of cathode engagement grooves 3011 adapted to the engagement protrusions 1011. The second engagement portion of the anode positioning groove 401 includes a plurality of anode engagement grooves 4011 adapted to the engagement protrusions 1011.

[0048] The bipolar plate 1 is tightly fitted and connected with the cathode engagement groove 3011 and the anode engagement groove 4011 by the engagement protrusion 1, so that the bipolar plate 1 can be accurately embedded between the cathode frame plate 3 and the anode frame plate 4, thereby improving the assembly accuracy of the bipolar plate 1, ensuring the positional accuracy of the bipolar plate 1 during the assembly process, avoiding measurement errors caused by positional offset, and further improving the stability and reliability of the connection between the bipolar plate 1 and the cathode frame plate 3 and the anode frame plate 4.

[0049] like Figure 1 , Figure 2 , Figure 3 As shown, the first biting part includes four biting protrusions 1011, and the recessed part between the two biting protrusions 1011 in the middle forms a potential groove 1012, which is reasonably arranged.

[0050] As an optional implementation, the anode frame plate 4 and the cathode frame plate 3 are respectively sealed to the bipolar plate 1 through the first sealing gasket 7.

[0051] Furthermore, cathode frame plate 3 and anode frame plate 4 are respectively provided with cathode sealing groove 303 and anode sealing groove 403 to accommodate the first sealing gasket 7. Cathode sealing groove 303 is connected to cathode positioning groove 301, and anode sealing groove 403 is connected to anode positioning groove 401.

[0052] When the anode frame plate 4 or cathode frame plate 3 is assembled with the bipolar plate 1, the first sealing gasket 7 is compressed in the cathode sealing groove 303 and the anode sealing groove 403 to form an effective seal between the bipolar plate 1 and the anode frame plate 4 or cathode frame plate 3.

[0053] As an optional implementation, such as Figure 4 , Figure 5 As shown, one side of the anode frame plate 4 is provided with multiple anode chamber inlets 404, and the other side is provided with multiple anode chamber outlets 405. Both the anode chamber inlets 404 and the anode chamber outlets 405 are connected to the flow field of the anode frame plate 4 and form a Z-shaped flow pattern. One side of the cathode frame plate 3 is provided with multiple cathode chamber inlets 304, and the other side is provided with multiple cathode chamber outlets 305. Both the cathode chamber inlets 304 and the cathode chamber outlets 305 are connected to the flow field of the cathode frame plate 3 and form a Z-shaped flow pattern.

[0054] Furthermore, two anode chamber inlets 404 are provided on one side of the anode frame plate 4, and two anode chamber outlets 405 are provided on the other side. Only the anode chamber inlets 404 and anode chamber outlets 405 are connected to the flow field of the anode frame plate 4, forming a Z-shaped flow pattern. This arrangement ensures that the electrolyte can be evenly distributed within the flow field.

[0055] Two cathode chamber inlets 304 are provided on one side of the cathode frame plate 3, and two cathode chamber outlets 305 are provided on the other side. Only the cathode chamber inlets 304 and cathode chamber outlets 305 on the cathode frame plate 3 are connected to the flow field of the cathode frame plate 3, forming a Z-shaped flow pattern. This arrangement allows the electrolyte to be evenly distributed inside the flow field.

[0056] As an optional implementation, such as Figure 4 , Figure 5 As shown, the anode frame plate 4 is provided with multiple anode through holes 406, and the cathode frame plate 3 is provided with multiple cathode through holes 306. The anode through holes 406 and the cathode through holes are provided in correspondence.

[0057] The function of the anode through-hole 406 and the cathode through-hole 306 is to allow the corresponding cathode and anode electrolytes to flow through after assembly, without leaking to other places.

[0058] Example 2:

[0059] like Figures 6-7 As shown, this utility model provides a vanadium redox flow battery with two chambers, including the chamber structure provided in Example 1. It includes, in sequence, an anode insulating end plate 12, an anode current collector 10, an anode carbon plate 14, a first sealing gasket 7, an anode frame plate 4, an anode electrode 6, a second sealing gasket 8, an ion membrane 2, a cathode electrode 5, a cathode frame plate 3, a first sealing gasket 7, a bipolar plate 1, a first sealing gasket 7, an anode frame plate 4, an anode electrode 6, a second sealing gasket 8, an ion membrane 2, a cathode electrode 5, a cathode frame plate 3, a first sealing gasket 7, a cathode carbon plate 13, a cathode current collector 9, and a cathode insulating end plate 11.

[0060] Furthermore, such as Figure 7 As shown, the structure of the cathode carbon plate 13 and the anode carbon plate 14 of this utility model is the same as that of the bipolar plate 1. They both have positioning protrusions that can be fitted and connected to the cathode positioning groove 301 of the cathode frame plate 3 and the anode positioning groove 401 of the anode frame plate 4, respectively.

[0061] The cathode insulating end plate 11 and the anode insulating end plate 12 are respectively provided with a cathode mounting groove 1101 and an anode mounting groove for mounting the cathode current collector 9 and the anode current collector 10, and their shapes are adapted to the cathode carbon plate 13 and the anode carbon plate 14.

[0062] Example 3:

[0063] This invention takes a vanadium redox flow battery with 20 chambers as an example to conduct the following performance evaluation and parameter optimization experiments.

[0064] Experiment 1: Comparing the performance of four types of electrodes (a, b, c, and d) with identical external dimensions but different manufacturing processes in a battery. Twenty small battery cells were filled with these four types of electrodes in different orders or combinations. For example, type a electrodes could be placed in cells 1-5, type b electrodes in cells 6-10, type c electrodes in cells 11-15, and type d electrodes in cells 16-20. Alternatively, type a, type b, type c, and type d electrodes could be placed in cells 1-4, 5-8, 9-12, 13-16, and 17-20 respectively. The voltage of each cell was then monitored. During battery operation, the voltage of each cell indicated which electrode was most suitable. A lower cell voltage during charging indicated better conductivity of the corresponding electrode, thus representing the most suitable cell.

[0065] Experiment 2: Place the same type of electrode in 20 small-cell batteries under identical conditions, only changing the liquid inlet flow rate at the anode and cathode. For example, different flow rates (1 ml / cm², 2 ml / cm², 3 ml / cm²) can be set. Observe whether the overall cell voltage is the same under the same current density and whether the voltage of each cell is uniform. If the cell voltage is not uniform, it indicates that the corresponding flow rate easily causes uneven flow field inside the battery, and adjustment is needed. If the cell voltage is uniform overall, but the potential is different for different flow rates, the flow rate can be adjusted to reduce the battery's internal resistance. By adjusting to the most suitable liquid inlet flow rate, the battery capacity and efficiency can be improved.

[0066] Experiment 3: Place the same type of electrode in a 20-compartment battery under identical conditions, only changing the electrolyte temperature (e.g., setting different electrolyte temperatures: 25℃, 35℃, 45℃). Observe whether the overall compartment voltage is the same at different temperatures under the same current density, and whether the voltage of each compartment is uniform. If the compartment voltage is not uniform, it indicates that the corresponding electrolyte temperature easily causes uneven flow field inside the battery, requiring adjustment. If the overall compartment voltage is uniform, but the potentials are different at different temperatures, the temperature can be adjusted to reduce the battery's internal resistance. By setting the most suitable electrolyte temperature, the battery capacity and efficiency can be improved.

[0067] Furthermore, during battery operation, by real-time monitoring of the cell voltage, the most suitable electrode plate flow field structure, number of inlet and outlet ports, and ion membrane type can be selected based on the uniformity of the cell voltage and the potential level.

[0068] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0069] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0070] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "a particular example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0072] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A cell structure, characterized by, The bipolar plate chamber comprises a bipolar plate, a cathode chamber and an anode chamber, and opposite sides of a cathode frame plate of the cathode chamber and an anode frame plate of the anode chamber are respectively in sealing connection with the bipolar plate.

2. A cell structure according to claim 1, wherein The number of the positioning protrusions is two groups, and the positioning protrusions are symmetrically arranged on two sides of the bipolar plate.

3. A cell structure according to claim 2, wherein The positioning protrusions are provided with potential recesses, and the potential test holes are in communication with the potential recesses through the positioning grooves.

4. A cell structure according to claim 3, wherein The positioning protrusions are provided with first engagement parts, and the positioning grooves are provided with second engagement parts, and the first engagement parts and the second engagement parts are in engagement connection.

5. The cell structure of claim 1, wherein The anode frame plate and the cathode frame plate are respectively in sealing connection with the bipolar plate through first sealing gaskets.

6. The cell structure of claim 1, wherein One side of the anode frame plate is provided with a plurality of anode chamber feed ports, and the other side is provided with a plurality of anode chamber discharge ports, and the anode chamber feed ports and the anode chamber discharge ports are in communication with flow fields of the anode frame plate and form a Z-shaped flow communication mode. One side of the cathode frame plate is provided with a plurality of cathode chamber feed ports, and the other side is provided with a plurality of cathode chamber discharge ports, and the cathode chamber feed ports and the cathode chamber discharge ports are in communication with flow fields of the cathode frame plate and form a Z-shaped flow communication mode.

7. A cell structure according to claim 6, wherein The anode frame plate is provided with a plurality of anode through holes, and the cathode frame plate is provided with a plurality of cathode through holes, and the anode through holes and the cathode through holes are correspondingly arranged.

8. An all-vanadium redox flow battery characterised in that, The chamber structure comprises the chamber structure as claimed in any one of claims 1 to 7.

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