An electrode frame and stack unit for facilitating quick sealing

Abstract

The utility model belongs to the technical field of liquid flow battery energy storage system, concretely relates to an electrode frame convenient to seal fast, and the electrode frame includes electrode frame main part, first flow channel distribution subassembly and second flow channel distribution subassembly of being established in the same end face of electrode frame main part and the sealing assembly of being respectively welded on first flow channel distribution subassembly and second flow channel distribution subassembly, first flow channel distribution subassembly includes first cover plate recess, sets up the liquid inlet on first cover plate recess, first distribution flow channel and the first shunt of being arranged on first distribution flow channel, the sealing assembly includes sealing cover plate and welding rib. The utility model's electrode frame realizes electrode frame flow channel effective sealing through sealing cover plate and cover plate recess cooperation to prevent electrolyte leakage and short circuit flow, improves product quality, and can improve production efficiency through ultrasonic or vibration friction welding mode. The utility model also provides a kind of electric pile unit.

Description

Technical Field

[0001] This utility model relates to the technical field of flow battery energy storage systems, specifically to an electrode frame and stack unit that are easy to seal quickly. Background Technology

[0002] In a vanadium redox flow battery system, the core components include an electrode frame, a stacked unit consisting of carbon felt and a proton exchange membrane, and positive and negative electrolyte storage tanks. The electrode frame, as a key component for electrolyte distribution, achieves uniform distribution of the electrolyte in the reaction zone through its internal flow channel design, thereby ensuring the stability and efficiency of the electrochemical reaction. However, due to the requirements for electrolyte distribution, the flow channel structure of the electrode frame is often quite complex. Flow channel covers need to be added to the distribution channels of the electrode frame to prevent direct communication between the reaction zone and the common flow channel, thus preventing undistributed electrolyte from directly entering the reaction zone.

[0003] In existing technologies, most cover plates suffer from inadequate sealing, causing electrolyte to easily conduct along the shortest path within the electrode frame to the reaction zone. This not only disrupts the uniformity of electrolyte distribution but also leads to battery leakage and increased leakage current, affecting device safety and lifespan. Cover plates that are not properly sealed are prone to displacement during unit assembly, reducing product quality. Furthermore, some cover plates are sealed using laser welding. However, laser welding requires extremely high light transmittance from both the electrode frame and cover plate materials, limiting the range of material choices. Moreover, laser welding requires sequential welding along the flow path, resulting in a time-consuming and inefficient process that is difficult to meet the demands of large-scale mass production.

[0004] Therefore, it is necessary to provide new electrode frames and stack units that are easy to seal quickly. Utility Model Content

[0005] In view of this, the present invention provides an electrode frame and stack unit that are easy to seal quickly. The electrode frame achieves effective sealing of the flow channel by the sealing cover plate and the cover plate groove to prevent electrolyte leakage and short circuit flow, thereby improving product quality. Furthermore, it can improve production efficiency by ultrasonic or vibration friction welding.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: an electrode frame that is easy to seal quickly is provided, including: an electrode frame body, a first flow channel distribution component and a second flow channel distribution component respectively opened on the same end face of the electrode frame body, and a sealing component respectively welded to the first flow channel distribution component and the second flow channel distribution component. The first flow channel distribution component includes a first cover plate groove, a liquid inlet opened on the first cover plate groove, a first distribution channel, and a first diverter disposed on the first distribution channel. The second flow channel distribution component includes a second cover plate groove, a liquid outlet opened on the second cover plate groove, a second distribution channel, and a second diverter disposed on the second distribution channel. The sealing component includes a sealing cover plate and a welding rib. The sealing cover plate cooperates with the first cover plate groove and the second cover plate groove.

[0007] Furthermore, the electrode frame also includes a reaction groove formed between the first flow channel distribution component and the second flow channel distribution component; The second flow channel distribution component is centrally symmetrical with the first flow channel distribution component.

[0008] Furthermore, the first flow channel distribution assembly further includes a first partition disposed on the first distribution flow channel; the second flow channel distribution assembly further includes a second partition disposed on the second distribution flow channel.

[0009] Furthermore, the first cover plate groove is approximately rectangular in shape, and the depth of the first cover plate groove matches the thickness of the sealing component.

[0010] Furthermore, the first distribution channel includes a first main channel and a first distribution area channel. The first main channel is generally serpentine in shape, and the first distribution area channel is generally rectangular in shape. One end of the first main channel is connected to the liquid inlet, and the other end is connected to the middle of the first distribution area channel. One side of the first distribution area channel is connected to the first main channel, and the other side of the first distribution area channel is connected to the edge of the reaction groove.

[0011] Furthermore, the first separator is disposed within the first distribution area channel. The first separator is generally elongated and protruding, and the top of the first separator is on the same horizontal line as the groove of the first cover plate. The first separator guides the flow of electrolyte.

[0012] Furthermore, multiple first diversion components are provided, which are evenly distributed on the side of the first distribution area channel near the reaction groove.

[0013] Furthermore, the sealing cover plate is provided in two parts, and the two sealing cover plates are also provided with connecting holes that are respectively connected to the liquid inlet and the liquid outlet; The welding ribs are provided in two forms. One welding rib is arranged along the outer periphery of the first cover plate groove and the boundary of the first distribution channel to form an annular closed profile. The other welding rib is arranged along the outer periphery of the second cover plate groove and the boundary of the second distribution channel to form an annular closed profile.

[0014] Furthermore, the sealing assembly is sealed to the first flow channel distribution assembly and the second flow channel distribution assembly by ultrasonic welding or vibration friction welding.

[0015] To achieve the above objectives, the technical solution adopted by this utility model is: to provide an electrode stack unit, including the electrode frame that facilitates rapid sealing as provided by any of the above solutions.

[0016] Furthermore, the fuel cell stack unit also includes carbon felt, a proton exchange membrane, and a bipolar plate. The fuel cell stack unit structure is arranged in the following order: bipolar plate, electrode frame, carbon felt, proton exchange membrane, carbon felt, electrode frame, and bipolar plate.

[0017] The beneficial effects of this utility model are as follows: The electrode frame and stack unit of this utility model, which facilitates rapid sealing, achieves effective sealing of the electrode frame flow channel by setting welding ribs on the first and second flow channel distribution components and adopting a structure in which the sealing cover plate and the cover plate groove cooperate; through the fusion welding of the welding ribs, a continuous and reliable sealing surface is formed, which effectively prevents electrolyte leakage from the top of the flow channel, avoids short-circuit flow of electrolyte, and improves the electrochemical performance and energy efficiency of the battery; the use of ultrasonic welding or vibration friction welding methods results in high welding efficiency, is suitable for large-scale production, and significantly improves manufacturing efficiency and consistency; after welding, the sealing cover plate forms a rigid connection with the electrode frame body, the structure is firm, and it is prevented from shifting during assembly or use, thereby improving the assembly success rate and reliability of the stack unit; the welding ribs are arranged along the sealing boundary of the flow channel, which effectively prevents electrolyte from entering the non-flow channel area, reduces electrolyte waste, and at the same time prevents side reactions from occurring, thus extending the battery life. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of the electrode frame that facilitates rapid sealing, provided in Embodiment 1 of this utility model; Figure 2 This is an exploded view of the electrode frame that facilitates rapid sealing, provided in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the structure of the electrode frame (excluding the sealing cover plate) that facilitates rapid sealing according to Embodiment 1 of this utility model; Figure 4This is a schematic diagram of the structure of the fuel cell stack unit provided in Embodiment 2 of this utility model; Figure 5 This is a diagram showing the usage state of the ultrasonic welding electrode frame provided in Embodiment 3 of this utility model; Figure 6 This is a diagram showing the usage state of the welding electrode frame of the vibration friction welding machine provided in Embodiment 4 of this utility model; Figure 7 This is a schematic diagram of the structure of the welding cover plate provided in Embodiment 4 of this utility model.

[0020] The component names and their numbers in the diagram are as follows: Electrode frame 100; Electrode frame body 1; First flow channel distribution assembly 2, first cover plate groove 21, liquid inlet 22, first distribution channel 23, first main channel 231, first distribution area channel 232, first separator 24, first diverter 25; Second flow channel distribution assembly 3, second cover plate groove 31, liquid outlet 32, second distribution flow channel 33, second main channel 331, second distribution area channel 332, second separator 34, second diverter 35; Sealing component 4, sealing cover plate 41, connecting hole 411, welding rib 42; Reaction groove 5; The fuel cell stack unit 200, carbon felt 201, proton exchange membrane 202, bipolar plate 203; Ultrasonic welding machine 300, welding machine body 301, welding head 302, base 303; Vibration friction welding machine 400, welding cover plate 401, welding bottom mold 402, fixing groove 403, limiting groove 404. Detailed Implementation

[0021] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] It should be noted that when a component is referred to as "connected to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0023] In the description of this utility model, it should 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0025] Throughout this specification, reference to "an embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appear in various places throughout the specification, and not all refer to the same embodiment. Furthermore, in one or more embodiments, a particular feature, structure, or characteristic may be combined in any suitable manner.

[0026] Example 1 like Figure 1 , Figure 2 As shown, this utility model provides an electrode frame 100 that facilitates rapid sealing, comprising an electrode frame body 1, a first flow channel distribution component 2 and a second flow channel distribution component 3 respectively opened on the same end face of the electrode frame body 1, a sealing component 4 respectively welded to the first flow channel distribution component 2 and the second flow channel distribution component 3, and a reaction groove 5 opened between the first flow channel distribution component 2 and the second flow channel distribution component 3. The electrode frame body 1 is used to construct the basic electrode frame structure; the first flow channel distribution component 2 is used to uniformly transport the incoming electrolyte to the edge of the reaction groove 5; the second flow channel distribution component 3 is used to uniformly collect and output the reacted electrolyte from the edge of the reaction groove 5; the sealing component 4 is used to seal the first flow channel distribution component 2 and the second flow channel distribution component 3 to form a closed flow channel and prevent electrolyte leakage; the reaction groove 5 is used to provide installation space and positioning for the reaction components of the fuel cell unit.

[0027] In some embodiments, the electrode frame body 1 is generally a square thin plate, and its length and width dimensions are adapted to the dimensions of the fuel cell stack unit 200. The electrode frame body 1 is made of an electrolyte corrosion-resistant material and has a certain mechanical strength, which can meet the support and clamping force requirements of the fuel cell stack unit 200 during assembly.

[0028] In some of these embodiments, such as Figure 3As shown, the first flow channel distribution assembly 2 is disposed on one side of one end face of the electrode frame body 1. The first flow channel distribution assembly 2 includes a first cover plate groove 21, an inlet 22 formed on the first cover plate groove 21, a first distribution channel 23, a first separator 24 disposed on the first distribution channel 23, and a first diverter 25. The first cover plate groove 21 is formed on one side of one end face of the electrode frame body 1. The first cover plate groove 21 is generally rectangular. The depth of the first cover plate groove 21 matches the thickness of the sealing assembly 4, ensuring that the sealing assembly 4 is flush with the surface of the electrode frame body 1 after being embedded in the first cover plate groove 21. The first cover plate groove 21 provides embedded installation space for the sealing assembly 4. The inlet 22, the first distribution channel 23, the first separator 24, and the first diverter 25 are all disposed within the first cover plate groove 21. By setting the closed structure formed by the first cover plate groove 21 and the sealing assembly 4, leakage of electrolyte from the top of the flow channel is prevented, and the electrolyte can only enter the edge of the reaction groove 5 through a designated path, thus improving the overall sealing performance. As an example, the depth of the first cover plate groove 21 is 0.6–0.9 mm. The inlet 22 is a slot formed in the first cover plate groove 21, located at one end of the groove. The inlet 22 is connected to an external electrolyte supply pipeline and also communicates with the first distribution channel 23. The inlet 22 is the entrance for the electrolyte into the first distribution channel assembly 2, used to introduce the electrolyte into the first distribution channel 23. It can control the inflow direction and initial flow rate of the electrolyte, preventing the electrolyte from directly entering the reaction groove 5 area and causing localized uneven concentration. The first distribution channel 23 is formed on the bottom of the first cover plate groove 21. The first distribution channel 23 includes a first main channel 231 and a first distribution area channel 232. The first main channel 231 is approximately serpentine in shape, and the first distribution area channel 232 is approximately rectangular. One end of the first main channel 231 communicates with the inlet 22, and the other end communicates with the middle of the first distribution area channel 232. One side of the first distribution area channel 232 is connected to the first main channel 231, and the other side of the first distribution area channel 232 is connected to the edge of the reaction groove 5. The first distribution channel 23 is used to receive the electrolyte from the inlet 22 and transport the electrolyte to the edge area of ​​the reaction groove 5 through the first distribution channel 23, providing sufficient electrolyte for the reaction zone. The first separator 24 is disposed in the first distribution area channel 232. The first separator 24 is generally elongated and protruding, and the top of the first separator 24 is on the same horizontal line as the first cover groove 21. The first separator 24 is parallel to the length side of the first distribution area channel 232, and the length of the first separator 24 is less than the length of the first distribution area channel 232.The first separator 24 is located near the connection between the first main channel 231 and the first distribution area channel 232. The first separator 24 guides the flow of the electrolyte, ensuring it flows along a predetermined path and preventing it from flowing directly through the central part of the first main channel 231. By blocking and guiding, the electrolyte flows more fully through the predetermined area, improving distribution uniformity. Multiple first diverter 25s are evenly distributed on the side of the first distribution area channel 232 near the reaction groove 5. The top of the first diverter 25 is on the same horizontal line as the first cover groove 21. It is used to finally divert the electrolyte transported by the first distribution channel 23 at the edge of the reaction groove 5, ensuring that the electrolyte can penetrate the reaction components evenly and smoothly. This avoids local over- or under-abundance of electrolyte when it directly enters the reaction groove 5 from the first distribution area channel 232, ensuring reaction uniformity and a more balanced electrolyte supply to all parts of the reaction groove 5, thus improving the efficiency and consistency of the electrochemical reaction.

[0029] In some of these embodiments, such as Figure 3As shown, the second flow channel distribution assembly 3 is disposed on one side of one end face of the electrode frame body 1. The second flow channel distribution assembly 3 and the first flow channel distribution assembly 2 are located on the same end face and are centrally symmetrical. The second flow channel distribution assembly 3 includes a second cover plate groove 31, a liquid outlet 32 ​​formed in the second cover plate groove 31, a second distribution channel 33, a second separator 34 disposed in the second distribution channel 33, and a second diverter 35. The second cover plate groove 31 is formed on the other side of one end face of the electrode frame body 1, and the second cover plate groove 31 and the first cover plate groove 21 are formed on the same end face of the electrode frame body 1. The second cover plate groove 31 and the first cover plate groove 21 are centrally symmetrical. The second cover plate groove 31 is approximately rectangular, and its depth matches the thickness of the sealing assembly 4, ensuring that the sealing assembly 4 is flush with the surface of the electrode frame body 1 after being embedded in the second cover plate groove 31. The second cover plate groove 31 provides an embedded installation space for the sealing assembly 4. The outlet 32, the second distribution channel 33, the second separator 34, and the second diverter 35 are all disposed within the second cover plate groove 31. By setting the closed structure formed by the second cover plate groove 31 and the sealing assembly 4, electrolyte leakage from the top of the channel is prevented, improving the overall sealing performance. As an example, the depth of the second cover plate groove 31 is 0.6–0.9 mm. The outlet 32 ​​is a slot formed on the second cover plate groove 31, and the outlet 32 ​​is located at one end of the second cover plate groove 31. The outlet 32 ​​is connected to an external electrolyte recovery pipeline and is also connected to the second distribution channel 33. The outlet 32 ​​is the outlet for electrolyte to flow out of the second distribution channel assembly 3, used to guide the electrolyte from the second distribution channel 33 and collect it in the external recovery pipeline, so that the electrolyte after reaction in the reaction zone is output through the outlet 32. The second distribution channel 33 is formed on the bottom of the groove 31 of the second cover plate. The second distribution channel 33 includes a second main channel 331 and a second distribution area channel 332. The second main channel 331 is roughly serpentine, and the second distribution area channel 332 is roughly rectangular. One end of the second main channel 331 is connected to the outlet 32, and the other end is connected to the middle of the second distribution area channel 332. One side of the second distribution area channel 332 is connected to the second main channel 331, and the other side is connected to the edge of the reaction groove 5. The second main channel 331 is used to receive the electrolyte from the second distribution area channel 332. The electrolyte after reaction in the reaction groove 5 enters the second distribution channel 33 through the edge area of ​​the reaction groove 5. The second separator 34 is disposed in the second distribution area channel 332. The second separator 34 is roughly elongated and protruding, and the top of the second separator 34 is on the same horizontal line as the groove 31 of the second cover plate. The second separator 34 is parallel to the length side of the second distribution area channel 332, and the length of the second separator 34 is less than the length of the second distribution area channel 332.The second separator 34 is located near the connection between the second main channel 331 and the second distribution area channel 332. The second separator 34 guides the flow of the electrolyte, ensuring it flows along a predetermined path and preventing backflow or blockage through obstruction and guidance. Multiple second diverter 35s are evenly distributed on the side of the second distribution area channel 332 near the reaction groove 5. The top of each second diverter 35 is on the same horizontal line as the second cover plate groove 31. This allows the electrolyte, after reaction in the reaction groove 5, to flow evenly into the second distribution area channel 332. The second separator 34 then guides the electrolyte flow, ensuring it smoothly flows into the second main channel 331 and finally out through 32, guaranteeing the balance of the output electrolyte, optimizing the electrolyte collection state, reducing dead zones in the flow channel, and improving efficiency.

[0030] In some of these embodiments, such as Figure 2As shown, the sealing assembly 4 has two sets, which are respectively covered on the first flow channel distribution assembly 2 and the second flow channel distribution assembly 3 to form a closed flow channel and prevent electrolyte leakage. The sealing assembly 4 includes a sealing cover plate 41 and a welding rib 42. There are two sealing cover plates 41, the dimensions of which are matched with the dimensions of the first cover plate groove 21 and the second cover plate groove 31, and the thickness of the sealing cover plate 41 is matched with the depth of the first cover plate groove 21 and the second cover plate groove 31, ensuring that the sealing cover plate 41 is flush with the surface of the electrode frame body 1 after being embedded in the first cover plate groove 21 and the second cover plate groove 31. The sealing cover plate 41 is used to cover the first cover plate groove 21 and the second cover plate groove 31, respectively. The sealing cover plate 41 is also provided with a connecting hole 411, which is connected to the liquid inlet 22 and the liquid outlet 32, respectively, for inputting or outputting electrolyte. Two welding ribs 42 are also provided. The cross-section of the welding ribs 42 is triangular. The triangular cross-section of the welding ribs 42 makes them easier to melt and provides a better sealing effect. One of the welding ribs 42 is arranged along the outer periphery of the first cover plate groove 21 and around the sealing boundary of the first distribution channel 23 to form an annular closed profile. This ensures that the contact between the sealing cover plate 41 and the edge of the first cover plate groove 21 can form a continuous sealing surface through welding, further sealing potential leakage points inside the first distribution channel 23. The other welding rib 42 is arranged along the outer periphery of the second cover plate groove 31 and around the sealing boundary of the second distribution channel 33 to form an annular closed profile. This ensures that the contact between the sealing cover plate 41 and the edge of the second cover plate groove 31 can form a continuous sealing surface through welding, further sealing potential leakage points inside the second distribution channel 33. During welding, the welding ribs 42 melt through the heat generated by ultrasonic waves or vibration friction, causing the sealing cover plate 41 to fuse with the upper surfaces of the first cover plate groove 21 and the second cover plate groove 31, forming an irreversible sealing connection. After melting, the weld rib 42 fills the gap between the sealing cover plate 41 and the first cover plate groove 21 and the second cover plate groove 31, preventing electrolyte leakage and enabling a rigid connection between the sealing cover plate 41 and the electrode frame body 1, preventing the sealing cover plate 41 from shifting, and making the connection more secure after welding; at the same time, it prevents the electrolyte from entering the dead zone, saving electrolyte consumption, and can replace laser welding. Ultrasonic or vibration friction welding is more efficient.

[0031] In some embodiments, the reaction groove 5 is formed in the middle region of the electrode frame body 1. The size of the reaction groove 5 matches the size of the carbon felt 201 in the stack unit 200. The reaction groove 5 is located between the first cover plate groove 21 and the second cover plate groove 31, and the two side edges of the reaction groove 5 are respectively connected to the edges of the first distribution area channel 232 and the second distribution area channel 332. The reaction groove 5 is used to provide a precise installation and positioning space for the carbon felt and to ensure that the electrolyte can be uniformly penetrated into the carbon felt on the reaction groove 5, thus ensuring the subsequent electrochemical reaction.

[0032] The electrode frame 100 of this utility model, which facilitates rapid sealing, includes an electrode frame body 1, a first flow channel distribution component 2 and a second flow channel distribution component 3 respectively opened on the same end face of the electrode frame body 1, a sealing component 4 respectively welded on the first flow channel distribution component 2 and the second flow channel distribution component 3, and a reaction groove 5 opened between the first flow channel distribution component 2 and the second flow channel distribution component 3. The first flow channel distribution component 2 includes a first cover plate groove 21, an inlet 22 opened on the first cover plate groove 21, a first distribution channel 23, a first separator 24 and a first diverter 25 disposed on the first distribution channel 23. The second flow channel distribution component 3 is centrally symmetrical with the first flow channel distribution component 2. The second flow channel distribution component 3 includes a second cover plate groove 31, an outlet 32 ​​opened on the second cover plate groove 31, a second distribution channel 33, a second separator 34 and a second diverter 35 disposed on the second distribution channel 33. The sealing component 4 includes a sealing cover plate 41 and a welding rib 42. The electrode frame 100 of this invention, which facilitates rapid sealing, achieves effective sealing of the electrode frame flow channel by setting welding ribs 42 on the first flow channel distribution component 2 and the second flow channel distribution component 3, and adopting a structure in which the sealing cover plate 41 cooperates with the cover plate groove. Through the fusion welding of the welding ribs, a continuous and reliable sealing surface is formed, which effectively prevents electrolyte leakage from the top of the flow channel, avoids short-circuit flow of electrolyte, and improves the electrochemical performance and energy efficiency of the battery. The use of ultrasonic welding or vibration friction welding method has no special requirements for the light transmittance of the material, has high welding efficiency, is suitable for large-scale production, and significantly improves manufacturing efficiency and consistency. After welding, the sealing cover plate 41 forms a rigid connection with the electrode frame body 1, which is structurally strong and prevents the sealing cover plate 41 from shifting during assembly or use, thereby improving the assembly success rate and reliability of the stack unit 200. The welding ribs 42 are arranged along the flow channel sealing boundary, which effectively prevents electrolyte from entering the non-flow channel area, reduces electrolyte waste, and at the same time prevents side reactions from occurring, thus extending the battery life.

[0033] Example 2 like Figure 4As shown, this utility model also provides a fuel cell stack unit 200, including the electrode frame 100 provided in Embodiment 1 above, and further including a carbon felt 201, a proton exchange membrane 202, and a bipolar plate 203. The fuel cell stack unit 200 is structured in the following order: bipolar plate 203, electrode frame 100, carbon felt 201, proton exchange membrane 202, carbon felt 201, electrode frame 100, and bipolar plate 203. The bipolar plates 203 are located on both sides of the stack unit 200, used to connect adjacent stack units 200 in series to form a series circuit, ensuring efficient current conduction. The electrode frame 100 located on one side of the proton exchange membrane 202 is used to circulate the positive electrolyte, and the electrode frame 100 located on the other side of the proton exchange membrane 202 is used to circulate the negative electrolyte. The carbon felt 201 has a porous structure, which can increase the reaction contact area, improve the utilization rate of active materials, and enhance the reaction efficiency. The carbon felt 201 is set in the reaction groove 5 of the electrode frame 100, and is used to diffuse the corresponding positive electrolyte or negative electrolyte. The proton exchange membrane 202 is a thin film that only allows protons to pass through, ensuring that protons can migrate from one electrode to another during the charging / discharging process of the flow battery, maintaining charge balance. The proton exchange membrane 202 is located between the two carbon felts 201, used to separate the electrolytes of the anode and cathode, prevent the two electrolytes from mixing and contaminating each other, and ensure the continuous operation of the battery reaction.

[0034] Example 3 like Figure 5 As shown, this utility model also provides an ultrasonic welding machine 300, which is used to perform ultrasonic welding on an electrode frame 100. The ultrasonic welding machine 300 includes a welding machine body 301, a welding head 302 connected to the welding machine body 301, and a base 303 disposed at the bottom of the welding machine body 301. The base 303 has a groove that matches the electrode frame 100, which is suitable for placing the electrode frame 100 and limiting the electrode frame 100. The size of the welding head 302 matches the size of the sealing cover plate 41, enabling one-time welding.

[0035] When using the ultrasonic welding machine 300, the electrode frame 100 is placed in the groove of the base 303 to ensure consistent placement of the electrode frame 100 each time. The sealing cover plate 41 is then placed sequentially in the first cover plate groove 21 and the second cover plate groove 31. The welding head 302 is mounted on the welding machine body 3013 and used for welding. After welding, the welding rib 42 melts, and the sealing component 4 and the electrode frame body 1 become one unit. A pressure drop test is performed on the electrode frame 100 using a special gas testing fixture. A pressure of 200 kPa is injected and the machine is sealed. After 30 cycles, the pressure drop is no higher than 1%, meeting the sealing requirements.

[0036] Example 4 like Figure 6As shown, this utility model also provides a vibration friction welding machine 400, which is used for vibration friction welding of an electrode frame 100. The vibration friction welding machine 400 includes a welding machine body (not shown in the figure), a welding cover plate 401 connected to the welding machine body, and a welding bottom mold 402 disposed below the welding cover plate 401, as shown in the figure. Figure 7 As shown, two fixing grooves 403 are provided on the welding cover plate 401. The dimensions of the two fixing grooves 403 are matched with the dimensions of the sealing cover plate 41, which is suitable for limiting the sealing cover plate 41. A limiting groove 404 is provided on the welding bottom mold 402 to match the electrode frame 100, which is suitable for placing the electrode frame 100 and limiting the electrode frame 100.

[0037] When using the vibration friction welding machine 400, the electrode frame 100 is placed in the limiting groove 404 of the welding base mold 402 to ensure the consistency of the electrode frame 100's placement position each time. The sealing cover plate 41 is placed sequentially in the first cover plate groove 21 and the second cover plate groove 31. Then, the welding cover plate 401 is placed on the electrode frame 100, and the fixing groove 403 is placed corresponding to the sealing cover plate 41. The welding machine body drives the welding cover plate 401 to press down on the electrode frame 100, and welding is performed by transverse vibration. After welding, the welding rib 42 melts, and the sealing component 4 and the electrode frame body 1 become one. The electrode frame 100 is tested by pressure drop using a special gas testing fixture. 200 kPa gas pressure is injected and sealed. After 30 cycles, the pressure drop is not higher than 1%, which meets the sealing requirements.

[0038] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An electrode frame that facilitates rapid sealing, characterized in that, include: The electrode frame body comprises a first flow channel distribution assembly and a second flow channel distribution assembly respectively formed on the same end face of the electrode frame body, and a sealing assembly respectively welded to the first flow channel distribution assembly and the second flow channel distribution assembly. The first flow channel distribution assembly includes a first cover plate groove, an inlet formed on the first cover plate groove, a first distribution channel, and a first diverter disposed on the first distribution channel. The second flow channel distribution assembly includes a second cover plate groove, an outlet formed on the second cover plate groove, a second distribution channel, and a second diverter disposed on the second distribution channel. The sealing assembly includes a sealing cover plate and a welding rib. The sealing cover plate cooperates with the first cover plate groove and the second cover plate groove.

2. The electrode frame for easy and rapid sealing according to claim 1, characterized in that, The electrode frame further includes a reaction groove formed between the first flow channel distribution component and the second flow channel distribution component; The second flow channel distribution component is centrally symmetrical with the first flow channel distribution component.

3. The electrode frame for easy and rapid sealing according to claim 2, characterized in that, The first flow channel distribution assembly further includes a first separator disposed on the first distribution flow channel; the second flow channel distribution assembly further includes a second separator disposed on the second distribution flow channel.

4. The electrode frame for easy and rapid sealing according to claim 1, characterized in that, The first cover plate groove is a rectangular recessed groove, and the depth of the first cover plate groove matches the thickness of the sealing component.

5. The electrode frame for easy and rapid sealing according to claim 3, characterized in that, The first distribution channel includes a first main channel and a first distribution area channel. The first main channel is serpentine and the first distribution area channel is rectangular. One end of the first main channel is connected to the liquid inlet and the other end is connected to the middle of the first distribution area channel. One side of the first distribution area channel is connected to the first main channel and the other side of the first distribution area channel is connected to the edge of the reaction groove.

6. The electrode frame for easy and rapid sealing according to claim 5, characterized in that, The first separator is disposed within the channel of the first distribution area. The first separator is a long strip-shaped protrusion. The top of the first separator is on the same horizontal line as the groove of the first cover plate. The first separator guides the flow of electrolyte.

7. The electrode frame for easy and rapid sealing according to claim 5, characterized in that, Multiple first diverter components are provided, and they are evenly distributed on the side of the first distribution area channel near the reaction groove.

8. The electrode frame for easy and rapid sealing according to claim 1, characterized in that, The sealing cover plate is provided in two parts, and the two sealing cover plates are also provided with connecting holes that are respectively connected to the liquid inlet and the liquid outlet; The welding ribs are provided in two forms. One welding rib is arranged along the outer periphery of the first cover plate groove and the boundary of the first distribution channel to form an annular closed profile. The other welding rib is arranged along the outer periphery of the second cover plate groove and the boundary of the second distribution channel to form an annular closed profile.

9. The electrode frame for easy and rapid sealing according to claim 1, characterized in that, The sealing assembly is sealed to the first flow channel distribution assembly and the second flow channel distribution assembly by ultrasonic welding or vibration friction welding.

10. A fuel cell stack unit, characterized in that, The fuel cell unit includes an electrode frame as described in any one of claims 1 to 8 that facilitates rapid sealing.

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