Proton exchange membrane thermo-cooling device, proton exchange membrane and fuel cell stack for flow batteries

Abstract

This utility model discloses a proton exchange membrane hot-cold pressing device, a proton exchange membrane, and a fuel cell stack for flow batteries, relating to the field of hot melt adhesive. It includes a press mold and several tooling fixtures. The press mold includes a first heating mold, a second heating mold, and positioning blocks. The tooling fixtures are perforated copper plate fixtures. Positioning of the tooling is achieved through positioning grooves, clearance grooves, and positioning blocks. Positioning of the proton exchange membrane preform is achieved through the groove plane and the lower surface protrusion plane. High-temperature Teflon tape is adhered to the groove plane and the lower surface protrusion plane to prevent adhesion. This proton exchange membrane hot-cold pressing device for flow batteries solves the positioning problem of proton exchange membrane preforms and tooling, improving production efficiency by increasing the production of multiple preforms per batch instead of one, and can be used to manufacture proton exchange membranes and flow battery stacks.

Description

Technical Field

[0001] This utility model relates to the field of flow battery technology, specifically to a proton exchange membrane hot-cold pressing device, a proton exchange membrane, and a flow battery stack for a flow battery. Background Technology

[0002] Flow batteries offer advantages such as high safety, long cycle life, low environmental impact, and recyclable battery materials, enabling large-scale energy storage. The main components of a vanadium redox flow battery stack include end plates, current collectors, electrode frames, bipolar plates, electrodes, and a proton exchange membrane (PEM). The quality of the PEM determines the efficiency and lifespan of the flow battery stack.

[0003] In the hot and cold pressing process of proton exchange membranes, existing technologies have many problems. When placing preforms, the preforms lack an effective positioning structure within the tooling, causing them to easily shift off-center within the tooling. At the same time, the tooling also lacks a positioning device in the press, making it extremely easy to place the tooling off-center when placed manually. This not only affects product quality but also leads to low production efficiency. Summary of the Invention

[0004] Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a proton exchange membrane hot-cold pressing device for flow batteries, which solves the problems mentioned in the background art. This improved proton exchange membrane hot-cold pressing fixture is designed to solve the problems of lack of positioning in the proton exchange membrane preform placement fixture, lack of positioning in the press, and efficiency issues in the proton exchange membrane preformation process, increasing the production capacity from one preform per batch to two or more preforms per batch.

[0005] Technical solution To achieve the above objectives, this utility model provides the following technical solution: a proton exchange membrane thermo-cooling device for flow batteries. The device includes a press mold and several toolings stacked between the press molds. Several adjacent toolings are used to place a proton exchange membrane preform. The proton exchange membrane preform includes two layers of hot melt adhesive and a proton exchange membrane, with the proton exchange membrane positioned between the two layers of hot melt adhesive.

[0006] Press molds include: The first heating mold and the second heating mold have several positioning grooves on the upper end surface of the first heating mold and several clearance grooves on the lower end surface of the second heating mold.

[0007] A positioning stop is installed between the positioning groove and the corresponding clearance groove. The positioning stop is used to position the installation fixture. Through the cooperation of the positioning groove, clearance groove and positioning stop, the fixture is accurately positioned in the press, avoiding the placement deviation problem that may occur when placed manually.

[0008] As a further description of the above technical solution: several fixtures are perforated fixtures, and the dimensions of the perforated plane of the fixtures are consistent with the dimensions of the proton exchange membrane preform. This design can ensure that the proton exchange membrane preform is accurately positioned within the fixtures and prevent the preform from deviating within the fixtures.

[0009] Preferably, the perforated fixture is a copper plate fixture. Copper plates have good thermal conductivity, which can ensure uniform temperature transfer during hot and cold pressing and improve the hot and cold pressing effect.

[0010] As a further description of the above technical solution: the perforated fixture includes a first fixture, a second fixture, and a third fixture. The first and second fixtures each have a grooved plane, and the lower end faces of the second and third fixtures have raised lower surfaces. Adjacent raised lower surfaces are used for positioning and installation within the grooved planes. The planar dimensions of the grooved planes and the raised lower surfaces are consistent with the dimensions of the proton exchange membrane preform, allowing the proton exchange membrane preform to be placed between the adjacent grooved planes and raised lower surfaces. This structural design not only achieves precise positioning between the fixtures but also provides a stable placement space for the proton exchange membrane preform, ensuring the smooth operation of the hot and cold pressing process.

[0011] The perforated fixture also includes a fourth fixture, which works in conjunction with the third fixture to hot-cold press the proton exchange membrane preform. By coordinating multiple fixtures, multiple proton exchange membrane preforms can be hot-cold pressed simultaneously, thereby achieving the goal of producing multiple preforms per batch and improving production efficiency.

[0012] A layer of high-temperature Teflon tape is adhered to both the grooved plane and the raised plane on the lower surface to prevent the proton exchange membrane from sticking to the copper plate after being subjected to hot-cold pressing and hot-melt adhesive. The high-temperature Teflon tape has excellent high-temperature resistance and anti-stick properties, effectively preventing adhesion between the proton exchange membrane and the copper plate tooling, thus ensuring product quality and appearance.

[0013] The groove depth is 0.5-2 mm, and the lower surface protrusion height is 0.5-2 mm. In a preferred embodiment, the groove depth is 1 mm, and the lower surface protrusion height is 1 mm. This dimensional design ensures that the proton exchange membrane preform receives appropriate pressure and temperature during the hot-cold pressing process, guaranteeing that the hot melt adhesive can fully melt and bond tightly to the proton exchange membrane, while avoiding product quality issues caused by excessive or insufficient pressure.

[0014] A proton exchange membrane: The proton exchange membrane is manufactured according to the above-described proton exchange membrane hot-cold pressing device. Due to the use of the improved proton exchange membrane hot-cold pressing device, the proton exchange membrane has better performance in terms of dimensional accuracy and hot melt adhesive distribution uniformity, which can improve the overall performance and service life of the flow battery.

[0015] A flow battery stack includes a stack manufactured based on the proton exchange membrane described above. Due to the improved performance of the proton exchange membrane, this flow battery stack exhibits significant advantages in energy conversion efficiency and stability, better meeting the needs of practical applications. Beneficial effects

[0016] This invention provides a proton exchange membrane thermo-cooling device for flow batteries. It has the following advantages: 1. This utility model achieves precise positioning of the tooling in the press mold by setting a positioning groove in the first heating mold and a clearance groove in the second heating mold, and by cooperating with positioning blocks. This avoids misalignment when manually placing the tooling, and improves the stability of product quality. At the same time, the cooperation of multiple toolings allows for hot and cold pressing of multiple proton exchange membrane preforms, thereby achieving the goal of producing multiple preforms each time and improving production efficiency. 2. In this utility model, high-temperature Teflon tape is pasted on the groove plane and the raised plane on the lower surface, which effectively prevents the proton exchange membrane from sticking to the copper plate by the hot melt adhesive after hot and cold pressing, making it easier to remove the proton exchange membrane preform after hot and cold pressing and improving production efficiency. Attached Figure Description

[0017] Figure 1 This is an exploded view of the overall assembly of this utility model; Figure 2 This is a schematic diagram of the second heating mold structure of this utility model; Figure 3 This is a schematic diagram of the upper end face structure of the first tooling of this utility model; Figure 4 This is a schematic diagram of the proton exchange membrane preform structure of this utility model; Figure 5 This is a schematic diagram of the lower end face structure of the second tooling of this utility model; Figure 6 This is a schematic diagram of the upper end face structure of the second tooling of this utility model; Figure 7 This is a cross-sectional view and partial view of the overall assembly of this utility model. In the figure: 1. Press mold; 11. First heating mold; 111. Positioning groove; 12. Second heating mold; 121. Clearance groove; 13. Positioning block; 2. Proton exchange membrane preform; 21. Hot melt adhesive; 22. Proton exchange membrane; 31. First tooling; 32. Second tooling; 33. Third tooling; 4. Groove plane; 5. Lower surface raised plane. Detailed Implementation

[0018] In the hot and cold pressing process of the proton exchange membrane 22, the preform lacks an effective positioning structure within the tooling when placing it, causing it to easily shift off-center within the tooling. Simultaneously, the tooling lacks a positioning device in the press, making it extremely easy to misalign during manual placement. This not only affects product quality but also leads to low production efficiency. Therefore, this utility model embodiment provides a proton exchange membrane hot and cold pressing device for flow batteries, such as... Figure 1-7 As shown, the device includes a press mold 1 and several toolings stacked between the press mold 1. The space between several adjacent toolings is used to place the proton exchange membrane preform 2, such as... Figure 4 As shown, the proton exchange membrane preform 2 includes two layers of hot melt adhesive 21 and a proton exchange membrane 22, with the proton exchange membrane 22 positioned between the two layers of hot melt adhesive 21.

[0019] like Figure 1 and 2 As shown, the press mold 1 includes: The first heating mold 11 and the second heating mold 12 are provided with a plurality of positioning grooves 111 on the upper end surface of the first heating mold 11 and a plurality of clearance grooves 121 on the lower end surface of the second heating mold 12.

[0020] The positioning block 13 is positioned between the positioning groove 111 and the corresponding clearance groove 121, and is used to position the installation fixture. Through the cooperation of the positioning groove 111, the clearance groove 121 and the positioning block 13, the fixture is accurately positioned in the press, avoiding the placement deviation problem that may occur when placed manually.

[0021] As a further description of the above technical solution: several fixtures are perforated fixtures, and the dimensions of the perforated plane of the fixtures are consistent with the dimensions of the proton exchange membrane preform 2. This design can ensure that the proton exchange membrane preform 2 is accurately positioned within the fixtures and prevent the preform from deviating within the fixtures.

[0022] Preferably, the perforated fixture is a copper plate fixture. Copper plates have good thermal conductivity, which can ensure uniform temperature transfer during hot and cold pressing and improve the hot and cold pressing effect.

[0023] like Figure 1 and Figure 7 As shown in Example 1, the assembly and use of the hot-cold pressing device for producing the double-layer proton exchange membrane 22. The proton exchange membrane thermo-cooling device for flow batteries is assembled as follows: First, install the first heating mold 11 and the second heating mold 12 on the press, ensuring that the positioning groove 111 of the first heating mold 11 and the clearance groove 121 of the second heating mold 12 are in corresponding positions.

[0024] Then, the positioning block 13 is placed between the positioning groove 111 and the corresponding clearance groove 121 to achieve the positioning and installation of the tooling.

[0025] Next, the first tooling 31, the second tooling 32, and the third tooling 33 are stacked in sequence, so that the protruding plane 5 on the lower surface of the second tooling 32 fits into the groove plane 4 of the first tooling 31, and the protruding plane 5 on the lower surface of the third tooling 33 fits into the groove plane 4 of the second tooling 32, and they cooperate with each other to hot and cold press the proton exchange membrane preform 2.

[0026] A layer of high-temperature Teflon tape is attached to the groove plane 4 and the raised plane 5 on the lower surface of each tool.

[0027] The proton exchange membrane thermo-cooling device used in this flow battery employs: The proton exchange membrane preform 2, consisting of two layers of hot melt adhesive 21 and a proton exchange membrane 22, is placed between the upper and lower adjacent groove planes 4 and the lower surface protrusion plane 5, ensuring that the proton exchange membrane 22 is positioned between the two layers of hot melt adhesive 21. A schematic diagram of the upper end face structure of the first tooling 31 is shown below. Figure 3 As shown, the structural schematic diagrams of the upper and lower end faces of the second tooling 32 are respectively as follows: Figure 6 , Figure 5 As shown, the lower end face of the third tooling 33 is as follows Figure 5 As shown.

[0028] The press is started to perform hot and cold pressing on the proton exchange membrane preform 2. During the hot and cold pressing process, the first heating mold 11 and the second heating mold 12 provide suitable temperatures, and the hot melt adhesive 21 is fully melted and tightly bonded to the proton exchange membrane 22 through the transfer of the tooling.

[0029] After hot and cold pressing, the tooling is removed to obtain the manufactured proton membrane 22.

[0030] Example 2: A hot-cold pressing device for producing a three-layer proton exchange membrane 22.

[0031] The assembly and use process of Embodiment 2 is similar to that of Embodiment 1. However, based on Embodiment 1, the upper end face of the third tooling 33 is provided with a groove plane 4, and the lower end face of the fourth tooling is provided with a lower surface protrusion plane 5. The fourth tooling and the third tooling 33 are used to hot and cold press the proton exchange membrane preform 2.

[0032] The embodiments of this case propose a hot-cold pressing device for producing two-layer and three-layer proton exchange membranes 22. However, the technical solutions of this case include, but are not limited to, hot-cold pressing devices for producing two-layer and three-layer proton exchange membranes 22. Depending on the actual production situation, multiple tooling can be used to simultaneously perform hot-cold pressing operations on multiple proton exchange membrane preforms 2, thereby achieving the goal of producing multiple preforms each time and improving production efficiency.

[0033] A layer of high-temperature Teflon tape is adhered to both the groove plane 4 and the raised plane 5 on the lower surface to prevent the proton exchange membrane 22 from sticking to the copper plate after being subjected to hot melt adhesive 21 during hot and cold pressing. The high-temperature Teflon tape has excellent high-temperature resistance and anti-stick properties, which can effectively prevent the proton exchange membrane 22 from sticking to the copper plate tooling, ensuring the quality and appearance of the product.

[0034] The groove plane 4 has a depth of 0.5-2 mm, and the lower surface raised plane 5 has a height of 0.5-2 mm. In a preferred embodiment, the groove plane 4 has a depth of 1 mm, and the lower surface raised plane 5 has a height of 1 mm. This dimensional design ensures that the proton exchange membrane preform 2 receives appropriate pressure and temperature during the hot and cold pressing process, guaranteeing that the hot melt adhesive 21 can fully melt and tightly bond with the proton exchange membrane 22, while avoiding product quality issues caused by excessive or insufficient pressure.

[0035] Manufacturing of proton exchange membrane 22: By using the above-mentioned hot and cold pressing device for proton exchange membrane 22 and performing hot and cold pressing operation on the proton exchange membrane preform 2 according to the above-mentioned usage method, a proton exchange membrane 22 that meets the requirements can be manufactured.

[0036] Manufacturing of flow battery stack: The proton exchange membrane 22 manufactured using the above-mentioned hot-cold pressing device is applied to the manufacturing process of flow battery stack and assembled according to the traditional manufacturing process of flow battery stack to obtain a flow battery stack containing the proton exchange membrane 22.

[0037] Working Principle: When using the proton exchange membrane hot-cold pressing device for flow batteries, in practical applications, the positioning block 13 is first placed in the positioning groove 111 of the first heating mold 11. Then, the tooling is stacked sequentially, and the tooling is positioned by the positioning block 13. The proton exchange membrane preform 2 is placed between the groove plane 4 and the lower surface protrusion plane 5 of the adjacent tooling to ensure accurate positioning of the proton exchange membrane preform 2. Then, the second heating mold 12 is placed on top of the tooling, so that the positioning block 13 is embedded in the clearance groove 121 of the second heating mold 12, completing the assembly of the entire hot-cold pressing device.

[0038] The press is started, and the first heating mold 11 and the second heating mold 12 heat the proton exchange membrane preform 2 within the tooling. Due to the excellent thermal conductivity of the copper plate tooling, heat can be evenly transferred to the proton exchange membrane preform 2, melting the hot melt adhesive 21. Under pressure, the two layers of hot melt adhesive 21 are tightly bonded to the proton exchange membrane 22. After hot pressing is completed, heating is stopped, and the device is cooled to allow the hot melt adhesive 21 to solidify. After cooling, the hot-cold pressed proton exchange membrane preform 2 is removed. Due to the effect of the high-temperature Teflon tape, the proton exchange membrane preform 2 will not stick to the copper plate tooling, making the process convenient and quick. In this way, multiple proton exchange membrane preforms 2 can be hot-cold pressed at once, improving production efficiency and product quality.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A proton exchange membrane hot-cold pressing device for flow batteries, comprising a press mold (1) and a plurality of toolings stacked between the press molds, wherein a plurality of adjacent toolings are used to place a proton exchange membrane preform (2), the proton exchange membrane preform (2) comprising two layers of hot melt adhesive (21) and a proton exchange membrane (22), the proton exchange membrane (22) being positioned between the two layers of hot melt adhesive (21); Its features are: The press mold (1) includes: The first heating mold (11) and the second heating mold (12) are provided with a plurality of positioning grooves (111) on the upper end surface of the first heating mold (11) and a plurality of clearance grooves (121) on the lower end surface of the second heating mold (12). A positioning block (13) is provided between the positioning groove (111) and the corresponding clearance groove (121), and the positioning block (13) is used to position and install the tooling.

2. The proton membrane hot cold press apparatus for flow batteries of claim 1, wherein: Some of the aforementioned fixtures are hollow fixtures, and the size of the hollow plane of the hollow fixture is consistent with the size of the proton membrane preform (2).

3. The proton membrane hot cold press apparatus for a flow battery of claim 2, wherein, The cutout fixture is a copper plate fixture.

4. The proton membrane hot cold press apparatus for flow batteries of claim 2, wherein: The hollow tooling includes a first tooling (31), a second tooling (32), and a third tooling (33). The first tooling (31) and the second tooling (32) are both provided with a groove plane (4). The lower end face of the second tooling and the third tooling is provided with a lower surface protrusion plane (5). The upper and lower adjacent lower surface protrusion planes (5) are used for positioning and installation in the groove plane (4). The plane dimensions of the groove plane (4) and the lower surface protrusion plane (5) are consistent with the dimensions of the proton membrane preform. The proton membrane preform (2) can be placed between the upper and lower adjacent groove planes (4) and the lower surface protrusion planes (5).

5. The proton membrane hot cold press apparatus for a flow battery of claim 4, wherein, The perforated fixture also includes a fourth fixture, which is used in conjunction with the third fixture (33) to hot and cold press the proton membrane preform (2).

6. The proton membrane hot cold press apparatus for a flow battery of claim 4, wherein: A layer of high-temperature Teflon tape is respectively pasted on the groove plane (4) and the lower surface protrusion plane (5) to prevent the proton membrane from sticking to the copper plate by the hot melt adhesive after hot and cold pressing.

7. The proton membrane hot cold press apparatus for a flow battery of claim 6, wherein The groove plane (4) has a depth of 0.5-2mm, and the lower surface protrusion plane (5) has a height of 0.5-2mm.

8. The proton membrane hot cold press apparatus for a flow battery of claim 5, wherein, The groove plane (4) has a depth of 1 mm, and the lower surface protrusion plane (5) has a height of 1 mm.

9. A proton membrane characterized in that, The proton exchange membrane is manufactured using a proton exchange membrane hot-cold pressing device for flow batteries according to any one of claims 1-8.

10. A stack, characterized by Including the proton membrane according to claim 9.

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