Diaphragm structure of flow battery

Abstract

The diaphragm structure comprises a mounting plate and a curved diaphragm, a second through hole is formed in the mounting plate, the edge of the curved diaphragm is attached to one side of the mounting plate and blocks the second through hole, the curved diaphragm comprises a semispherical shell diaphragm, the semispherical shell diaphragm and the second through hole are coaxial, and the semispherical shell diaphragm and the second through hole are coaxial. The diameter of the open end of the hemispherical shell diaphragm is not smaller than the hole diameter of the second through hole. The flow battery has the beneficial effects that the arc-shaped frame is matched with the mounting plate to support the curved-surface diaphragm, the thickness of the curved-surface diaphragm can be designed to be thinner, and the surface area of the curved-surface diaphragm is slightly larger than the area of the supporting surface of the arc-shaped frame, so that even if the flow battery is slightly shaken or collided to generate deformation, the flow battery can still work. The curved-surface diaphragm also has enough allowance to consume the deformation, so that the diaphragm is effectively prevented from being broken; in addition, the curved-surface diaphragm is supported by the arc-shaped frame, so that the curved-surface diaphragm can always keep a relatively large contact reaction area, and the performance of the flow battery can be fully exerted.

Description

Technical Field

[0001] The utility model relates to the field of liquid flow batteries, in particular to a diaphragm structure of a liquid flow battery. Background Art

[0002] Liquid flow battery is an electrochemical energy storage technology proposed by Thaller in 1974. It is a new type of battery. Liquid flow battery consists of battery stack unit, electrolyte, electrolyte storage supply unit and management control unit. The battery stack unit includes positive electrode collector, bipolar plate, junction frame, positive electrode plate, positive electrode reaction chamber, porous diaphragm, negative electrode reaction chamber, negative electrode plate, negative electrode collector and shell. Liquid flow battery is a high-performance battery that uses diaphragm to separate positive and negative electrode electrolytes and circulate them separately. It has the characteristics of high capacity, wide application field (environment) and long cycle life. It is a new energy product.

[0003] Liquid flow batteries achieve mutual conversion of electrical energy and chemical energy through reversible redox reactions (i.e. reversible changes in valence) of the active substances in the positive and negative electrolyte solutions using diaphragms. During charging, an oxidation reaction occurs at the positive electrode to increase the valence of the active substance, and a reduction reaction occurs at the negative electrode to reduce the valence of the active substance. The discharge process is the opposite. Unlike general solid-state batteries, the positive and (or) negative electrolyte solutions of liquid flow batteries are stored in tanks outside the battery and transported to the inside of the battery for reaction via pumps and pipelines.

[0004] The diaphragm is one of the key materials in liquid flow batteries. Its main function is to separate the positive and negative electrolytes of the battery, allowing only electrolyte ions to pass through to prevent the two poles from contacting and causing a short circuit.

[0005] Generally speaking, the thinner the diaphragm is designed to be in a liquid flow battery, the better. The thinner the diaphragm is, the faster the reaction rate of the liquid flow battery is and the higher the output power of the battery is. However, the thinner the diaphragm is, the weaker its strength is. A slight shake or collision deformation of the liquid flow battery can cause the diaphragm to rupture. Therefore, the thickness of the diaphragm designed in liquid flow batteries is generally moderate and not too thin. This limits the reaction rate of the liquid flow battery and the performance of the liquid flow battery cannot be fully utilized.

[0006] In addition, in order to simply pursue a thinner diaphragm thickness, some flow batteries use a fixing plate to install and fix the diaphragm to prevent the diaphragm from rupturing due to slight shaking or collision deformation of the flow battery. Although this technical means achieves a thinner diaphragm thickness design and makes the diaphragm less likely to rupture, the presence of the fixing plate greatly increases the volume of the flow battery and reduces the volume energy density of the flow battery, which is contrary to the current technical development path of flow batteries pursuing smaller volume and larger volume energy density. Moreover, the presence of the fixing plate seriously reduces the contact reaction area of ​​the diaphragm, greatly reduces the reaction rate of the flow battery, and reduces the output power of the flow battery. The quality and performance of the flow battery are not high, and it is difficult to promote and apply it in practice. Utility Model Content

[0007] The main purpose of the utility model is to provide a diaphragm structure of a liquid flow battery, aiming to solve the problem that the existing liquid flow battery is limited by the thickness of the diaphragm and the performance cannot be fully exerted.

[0008] To solve the above problems, the utility model proposes a diaphragm structure of a flow battery, including a mounting plate and a curved diaphragm, wherein the mounting plate is provided with a second through hole, and the edge of the curved diaphragm is attached to one side of the mounting plate to seal the second through hole.

[0009] In one embodiment, the curved surface diaphragm comprises a hemispherical shell diaphragm, the hemispherical shell diaphragm is coaxial with the second through hole, and the diameter of the open end of the hemispherical shell diaphragm is not less than the aperture of the second through hole.

[0010] In one embodiment, a mounting ring is attached to one side of the mounting plate, and the edge of the curved diaphragm is attached to the outer wall of the mounting ring to seal the second through hole.

[0011] In one embodiment, the mounting ring and the through hole are coaxial;

[0012] The curved surface diaphragm also includes an annular diaphragm connected to the open edge of the hemispherical shell diaphragm, and the annular diaphragm and the hemispherical shell diaphragm are coaxial and integrally formed;

[0013] The annular diaphragm is tightly sleeved on the outer wall of the mounting ring.

[0014] In one embodiment, the outer wall of the mounting ring is a conical surface, and the outer diameter of one end of the mounting ring in contact with the mounting plate is greater than the outer diameter of the other end of the mounting ring.

[0015] In one embodiment, the inner wall of the mounting ring is a conical surface, and the inner diameter of one end of the mounting ring in contact with the mounting plate is larger than the inner diameter of the other end of the mounting ring.

[0016] In one embodiment, an arc-shaped rod is provided on the inner wall of the hemispherical shell diaphragm along the meridian, and both ends of the arc-shaped rod are fixedly adjacent to the inner wall of the mounting ring.

[0017] In one embodiment, the arc-shaped rod is provided with bonding points that are in point contact with the inner wall of the hemispherical shell diaphragm, and there are a plurality of bonding points that are equidistantly arranged on the arc-shaped rod.

[0018] In one embodiment, there are multiple arc-shaped rods, and the multiple arc-shaped rods are centrally symmetrically distributed around the central axis of the hemispherical shell diaphragm, and the multiple arc-shaped rods cooperate with each other to form an arc-shaped frame.

[0019] In one embodiment, the second through hole is coaxial with the mounting plate, and the edge of the mounting plate is provided with a plurality of first through holes which are centrally symmetrically distributed with the second through hole as the center.

[0020] Beneficial effects: The technical solution of the utility model supports the curved diaphragm through an arc frame composed of multiple arc rods and a mounting plate. The design of the curved diaphragm increases the contact reaction area of ​​the diaphragm compared with the conventional flat diaphragm, improves the reaction rate of the flow battery, increases the output power of the flow battery, and improves the quality and performance of the flow battery;

[0021] The technical solution of the utility model supports the curved diaphragm through the arc frame and the mounting plate. The thickness of the curved diaphragm can be designed to be thinner, and the surface area of ​​the curved diaphragm is slightly larger than the area of ​​the supporting surface of the arc frame. In this way, even if the liquid flow battery is slightly shaken or collided to produce deformation, the curved diaphragm has enough margin to consume this deformation, effectively preventing the diaphragm from rupturing; in addition, the curved frame supporting the curved diaphragm can ensure that the curved diaphragm always maintains a large contact reaction area, so that the performance of the liquid flow battery can be fully exerted;

[0022] The technical solution of the utility model supports the curved diaphragm through an arc frame and a mounting plate. The thickness of the arc frame and the mounting plate are designed to be thin, which will not significantly increase the volume of the liquid flow battery, and the volume energy density of the liquid flow battery does not change much. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the structure of a diaphragm structure of a liquid flow battery of the utility model Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the structure of a diaphragm structure of a liquid flow battery of the utility model Figure 2 ;

[0026] Figure 3 It is a schematic diagram of bonding the arc rod and the hemispherical shell diaphragm of the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the mounting plate of the utility model. Figure 1 ;

[0028] Figure 5 This is a schematic diagram of the structure of the mounting plate of the utility model. Figure 2 .

[0029] The following are the descriptions of the reference numerals:

[0030] 1. Mounting plate; 2. Through hole 1; 3. Through hole 2; 4. Mounting ring;

[0031] 5. curved surface diaphragm; 51. hemispherical shell diaphragm; 52. annular diaphragm;

[0032] 6. Arc rod; 7. Bonding point. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0037] The utility model proposes a diaphragm structure of a liquid flow battery, wherein the diaphragm structure of the liquid flow battery supports a curved diaphragm 5 through an arc frame composed of a plurality of arc-shaped rods 6 in cooperation with a mounting plate 1. The design of the curved diaphragm 5 increases the contact reaction area of ​​the diaphragm compared with a conventional flat diaphragm, thereby increasing the reaction rate of the liquid flow battery, increasing the output power of the liquid flow battery, and improving the quality and performance of the liquid flow battery. In addition, the diaphragm structure of the liquid flow battery of the utility model supports the curved diaphragm 5 through an arc frame in cooperation with a mounting plate 1, and the thickness of the curved diaphragm 5 can be designed to be relatively thin, and the surface area of ​​the curved diaphragm 5 is slightly larger than that of the arc-shaped rods 6. The support surface area of ​​the frame is large, so even if the liquid flow battery is deformed by a slight shake or collision, the curved diaphragm 5 has enough margin to consume this deformation, effectively preventing the diaphragm from rupturing; in addition, the curved frame supporting the curved diaphragm 5 can ensure that the curved diaphragm 5 always maintains a large contact reaction area, so that the performance of the liquid flow battery can be fully exerted; and the diaphragm structure of the liquid flow battery of the utility model supports the curved diaphragm 5 through the curved frame and the mounting plate 1, and the thickness of the curved frame and the mounting plate 1 is designed to be thin, which will not significantly increase the volume of the liquid flow battery, and the volume energy density of the liquid flow battery does not change much.

[0038] Specifically, in an embodiment of the utility model, as Figure 1 , Figure 4 and Figure 5 As shown, the diaphragm structure of the liquid flow battery includes a mounting plate 1 and a curved diaphragm 5, wherein the mounting plate 1 is a flat plate, and usually, the mounting plate 1 is a rectangular plate to adapt to the shape of the positive electrode collector, bipolar plate, collector frame, positive electrode plate, positive electrode reaction chamber, porous diaphragm, negative electrode reaction chamber, negative electrode plate, negative electrode collector and shell of the liquid flow battery stack.

[0039] Further, such as Figure 4 and Figure 5As shown, the edge of the mounting plate 1 is provided with a plurality of through holes 2, through which the mounting rods of the flow battery stack pass, thereby facilitating the installation of the mounting plate 1.

[0040] In this embodiment, if Figure 4 and Figure 5 As shown, the mounting plate 1 is provided with a through hole 23, and the through hole 23 allows the electrolyte to penetrate the mounting plate 1. The curved diaphragm 5 is located on one side of the mounting plate 1, and the edge of the curved diaphragm 5 is tightly attached to the side of the mounting plate 1, thereby blocking the through hole 23. In this way, the electrolyte on one side of the mounting plate 1 penetrates the through hole 23 and then reaches the other side of the mounting plate 1, and then performs ion exchange with the electrolyte on the other side of the curved diaphragm 5. The electrolytes on both sides of the curved diaphragm 5 will not be in contact and connected. Compared with conventional planar diaphragms, the design of the curved diaphragm 5 increases the contact reaction area of ​​the diaphragm, improves the reaction rate of the liquid flow battery, increases the output power of the liquid flow battery, and improves the quality and performance of the liquid flow battery.

[0041] Furthermore, in this embodiment, if Figure 1 As shown, the curved diaphragm 5 includes a hemispherical shell diaphragm 51, and the diameter of the open end of the hemispherical shell diaphragm 51 is not less than the aperture of the through hole 2 3. With this design, the open end of the hemispherical shell diaphragm 51 can be directly bonded and sealed to the hole wall of the through hole 2 3 or bonded and sealed to the side of the mounting plate 1 to separate the electrolyte on both sides of the mounting plate 1 and the hemispherical shell diaphragm 51.

[0042] Preferably, the hemispherical shell diaphragm 51 and the through hole 2 3 are coaxial. Such a design facilitates the bonding and sealing connection between the hemispherical shell diaphragm 51 and the through hole 2 3, reduces the difficulty of bonding operation, and reduces the bonding operation cost.

[0043] In this embodiment, preferably, the through hole 2 3 and the mounting plate 1 are coaxial, and the plurality of through holes 1 2 are symmetrically distributed with the through hole 2 3 as the center. This design facilitates the rapid assembly of the diaphragm structure of this embodiment into the stack of the liquid flow battery, which helps to reduce the assembly cost of the stack of the liquid flow battery.

[0044] Furthermore, in this embodiment, in order to further reduce the difficulty of bonding and sealing the hemispherical shell diaphragm 51 and the through hole 2 3 / mounting plate 1, as shown in FIG. Figure 4 and Figure 5As shown, a mounting ring 4 is sealingly fixedly attached to one side of the mounting plate 1, and the edge of the curved diaphragm 5 is attached to the outer wall of the mounting ring 4, and the through hole 23 is blocked. With this design, the open end of the hemispherical shell diaphragm 51 can be sleeved on the mounting ring 4 and sealed and fixedly connected to the mounting ring 4, which greatly reduces the difficulty of operating the adhesive sealing connection between the hemispherical shell diaphragm 51 and the through hole 23 / mounting plate 1, shortens the operating time of the adhesive sealing connection between the hemispherical shell diaphragm 51 and the through hole 23 / mounting plate 1, improves the operating speed and efficiency of the adhesive sealing connection between the hemispherical shell diaphragm 51 and the through hole 23 / mounting plate 1, reduces the probability of accidents caused by damage to the hemispherical shell diaphragm 51 during the adhesive sealing connection between the hemispherical shell diaphragm 51 and the through hole 23 / mounting plate 1, and has good practicality.

[0045] Preferably, in this embodiment, Figure 4 and Figure 5 As shown, the mounting ring 4 and the through hole 23 are coaxial. This design, on the one hand, facilitates the open end of the hemispherical shell diaphragm 51 to be sleeved on the mounting ring 4 and sealed and fixedly connected to the mounting ring 4. On the other hand, the diameter of the mounting ring 4 can be reduced as much as possible, thereby reducing the manufacturing cost of the mounting ring 4.

[0046] Furthermore, in this embodiment, if Figure 4 and Figure 5As shown, the outer wall of the mounting ring 4 is a conical surface. Moving along the central axis direction of the mounting ring 4 in the direction away from the mounting plate 1, the outer diameter of the mounting ring 4 gradually decreases, that is, the outer diameter of the end of the mounting ring 4 in contact with the mounting plate 1 is larger than the outer diameter of the other end of the mounting ring 4. This design can protect the curved surface diaphragm 5, prevent the curved surface diaphragm 5 from being lifted up by the other end of the mounting ring 4 to produce creases, causing the curved surface diaphragm 5 to rupture and shorten the service life of the curved surface diaphragm 5, and achieve smooth and close contact between the curved surface diaphragm 5 and the mounting ring 4. During the operation of the liquid flow battery, the diaphragm will continue to fluctuate slightly. At this time, the curved surface diaphragm 5 is lifted up by the other end of the mounting ring 4 to produce creases, which will cause the curved surface diaphragm 5 at the crease to be repeatedly pushed up by the other end of the mounting ring 4. As time goes by, cracks will appear at the crease, shortening the service life of the curved diaphragm 5 and affecting the normal operation of the liquid flow battery. Therefore, the outer wall of the mounting ring 4 is designed to be a conical surface, and at the same time, the outer diameter of the mounting ring 4 gradually decreases as it moves along the central axis direction of the mounting ring 4 away from the mounting plate 1, that is, the outer diameter of the end of the mounting ring 4 in contact with the mounting plate 1 is larger than the outer diameter of the other end of the mounting ring 4, so that the outer wall of the mounting ring 4 and the inner wall of the curved diaphragm 5 next to the mounting ring 4 can be made parallel. After the curved diaphragm 5 is tightly attached to the outer wall of the mounting ring 4, no crease will be generated on the end of the mounting ring 4 away from the mounting plate 1, thereby effectively protecting the curved diaphragm 5, extending the service life of the curved diaphragm 5, and ensuring the long-term stable and reliable operation of the liquid flow battery.

[0047] Furthermore, in order to facilitate the sealing connection between the curved surface diaphragm 5 and the mounting ring 4 and enhance the sealing connection firmness between the curved surface diaphragm 5 and the mounting ring 4, as shown in FIG. Figure 1 As shown, the curved surface diaphragm 5 also includes an annular diaphragm 52 connected to the open edge of the hemispherical shell diaphragm 51, the annular diaphragm 52 and the hemispherical shell diaphragm 51 are coaxial and integrally formed, the annular diaphragm 52 is tightly sleeved on the outer wall of the mounting ring 4, the hemispherical shell diaphragm 51 does not contact the outer wall of the mounting ring 4, the inner wall of the annular diaphragm 52 is similar to the outer wall of the mounting ring 4, and is also a conical surface, and moves along the central axis direction of the annular diaphragm 52 toward the direction close to the hemispherical shell diaphragm 51, so The inner diameter of the annular diaphragm 52 gradually decreases, that is, the inner diameter of one end of the annular diaphragm 52 close to the hemispherical shell diaphragm 51 is smaller than the inner diameter of the other end of the annular diaphragm 52. This design facilitates the annular diaphragm 52 to be tightly sleeved on the outer wall of the mounting ring 4 and achieve a firm and reliable seal. Compared with the design in which the hemispherical shell diaphragm 51 is tightly sealed on the outer wall of the mounting ring 4, the firmness of the sealing connection between the curved diaphragm 5 and the mounting ring 4 can be enhanced, ensuring that the electrolyte on both sides of the mounting plate 1 and the curved diaphragm 5 are not connected.

[0048] In this embodiment, the hemispherical shell diaphragm 51 refers to the part of the diaphragm that is in the shape of a hemispherical shell. Figure 1 As shown, the design of the hemispherical shell diaphragm 51 increases the contact reaction area of ​​the diaphragm compared to the conventional planar diaphragm, improves the reaction rate of the liquid flow battery, increases the output power of the liquid flow battery, and improves the quality and performance of the liquid flow battery.

[0049] In this embodiment, the inner wall of the mounting ring 4 can be designed as a cylindrical surface or a conical surface, preferably a conical surface. This design makes it convenient for the arc rod 6 to be tightly attached to the inner wall of the mounting ring 4 and fixedly connected to the mounting ring 4, thereby enhancing the secure installation of the arc rod 6. When the inner wall of the mounting ring 4 is designed as a conical surface, the inner diameter of one end of the mounting ring 4 in contact with the mounting plate 1 is larger than the inner diameter of the other end of the mounting ring 4, that is, as it moves along the central axis of the mounting ring 4 away from the mounting plate 1, the outer diameter of the mounting ring 4 gradually decreases.

[0050] Furthermore, in this embodiment, if Figure 2 As shown, an arc rod 6 is extended along the meridian direction on the inner wall of the hemispherical shell diaphragm 51, and both ends of the arc rod 6 are fixedly connected to the inner wall of the mounting ring 4. There are multiple arc rods 6, and the multiple arc rods 6 are centrally symmetrically distributed with the central axis of the hemispherical shell diaphragm 51 as the center. The multiple arc rods 6 cooperate with each other to form an arc frame, and the arc frame cooperates with the mounting plate 1 to support the curved diaphragm 5. Compared with conventional planar diaphragms, the design of the curved diaphragm 5 increases the contact reaction area of ​​the diaphragm, improves the reaction rate of the liquid flow battery, increases the output power of the liquid flow battery, and improves the quality and performance of the liquid flow battery.

[0051] The diaphragm structure of the liquid flow battery of the present embodiment utilizes an arc frame in conjunction with the mounting plate 1 to support the curved diaphragm 5, so the thickness of the curved diaphragm 5 can be designed to be thinner. Furthermore, the thickness of the mounting plate 1 and the arc rod 6 can be designed to be equal to the thickness of the curved diaphragm 5. In this way, the thickness of the diaphragm structure of the liquid flow battery of the present embodiment is designed to be thinner, which will not significantly increase the volume of the liquid flow battery, and the volume energy density of the liquid flow battery will not change much.

[0052] In this embodiment, if Figure 2 and Figure 3 As shown, the inner wall of the hemispherical shell diaphragm 51 is in point contact with the arc rod 6, and the arc rod 6 is provided with bonding points 7 that are in point contact with the inner wall of the hemispherical shell diaphragm 51. There are several bonding points 7, which are equidistantly arranged on the arc rod 6. The purpose of this design is to reduce the vibration amplitude of the hemispherical shell diaphragm 51 during the operation of the liquid flow battery, thereby reducing the working noise of the liquid flow battery. The second purpose is to design the surface area of ​​the inner side of the hemispherical shell diaphragm 51 to be slightly larger than the area of ​​the supporting surface where the outer hemispherical surface of the arc frame is located. Figure 2 and Figure 3 As shown, the inner side surface of the hemispherical shell diaphragm 51 is in point contact with the supporting surface of any arc rod 6 where the outer hemispherical surface of the arc frame is located at the two bonding points 7B and C, and the inner side surface of the hemispherical shell diaphragm 51 does not contact the outer hemispherical surface of the arc frame at other positions. In this way, even if the liquid flow battery is deformed by a slight shake or collision, the hemispherical shell diaphragm 51 has enough margin to consume this deformation. Therefore, the hemispherical shell diaphragm 51 designed in this way is not affected by the deformation caused by a slight shake or collision of the liquid flow battery, and the annular diaphragm 52 is not affected by the deformation caused by a slight shake or collision of the liquid flow battery due to its annular design. Therefore, the curved diaphragm 5 of this embodiment can effectively prevent tearing due to deformation caused by a slight shake or collision of the liquid flow battery.

[0053] The diaphragm structure of the flow battery of this embodiment can ensure that the curved diaphragm 5 always maintains a large contact reaction area by supporting the curved diaphragm 5 through the arc frame, so that the performance of the flow battery can be fully exerted, which is conducive to the long-term efficient operation of the flow battery.

[0054] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A diaphragm structure of a flow battery, characterized in that: It comprises a mounting plate and a curved diaphragm, wherein the mounting plate is provided with a second through hole, and the edge of the curved diaphragm is attached to one side of the mounting plate to block the second through hole; The curved surface diaphragm comprises a hemispherical shell diaphragm, the hemispherical shell diaphragm is coaxial with the second through hole, and the diameter of the open end of the hemispherical shell diaphragm is not less than the aperture of the second through hole; A mounting ring is attached to one side of the mounting plate, and the edge of the curved diaphragm is attached to the outer wall of the mounting ring to seal the second through hole; The outer wall of the mounting ring is a conical surface, and the outer diameter of one end of the mounting ring in contact with the mounting plate is larger than the outer diameter of the other end of the mounting ring; An arc-shaped rod is provided on the inner wall of the hemispherical shell diaphragm along the meridian, and both ends of the arc-shaped rod are fixedly connected to the inner wall of the mounting ring.

2. A diaphragm structure for a flow battery according to claim 1, characterized in that: The mounting ring and the through hole are coaxial; The curved surface diaphragm also includes an annular diaphragm connected to the open edge of the hemispherical shell diaphragm, and the annular diaphragm and the hemispherical shell diaphragm are coaxial and integrally formed; The annular diaphragm is tightly sleeved on the outer wall of the mounting ring.

3. A diaphragm structure for a flow battery according to claim 1, characterized in that: The inner wall of the mounting ring is a conical surface, and the inner diameter of one end of the mounting ring in contact with the mounting plate is larger than the inner diameter of the other end of the mounting ring.

4. A diaphragm structure for a flow battery according to claim 1, characterized in that: The arc-shaped rod is provided with bonding points which are in point contact with the inner wall of the hemispherical shell diaphragm. There are a plurality of bonding points which are arranged at equal distances on the arc-shaped rod.

5. The diaphragm structure of a flow battery according to claim 1, characterized in that: There are multiple arc-shaped rods, which are centrally symmetrically distributed with the central axis of the hemispherical shell diaphragm as the center, and the multiple arc-shaped rods cooperate with each other to form an arc-shaped frame.

6. A diaphragm structure for a flow battery according to claim 1, characterized in that: The second through hole is coaxial with the mounting plate, and the edge of the mounting plate is provided with a plurality of first through holes which are centrally symmetrically distributed with the second through hole as the center.

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