Fuel cell membrane electrode vacuum hot press device and working method thereof

Abstract

The application belongs to the technical field of conveying, and particularly relates to a device for pressing a membrane electrode, and especially to a fuel cell membrane electrode vacuum hot pressing device and a working method thereof. The fuel cell membrane electrode vacuum hot pressing device comprises a vacuum hot pressing device body and a hot pressing plate. The vacuum hot pressing device body comprises a hot pressing groove and a vacuum pump. The top of the hot pressing plate is provided with a communication pipe which is in communication with both ends of the bottom surface of the hot pressing plate. By arranging the communication pipes on both sides of the hot pressing plate, the uniformity of the negative pressure distribution in the hot pressing groove is improved, so as to avoid the formation of a dead zone between the hot pressing groove and the hot pressing plate, thereby ensuring the uniformity of the pressure distribution in the hot pressing groove and avoiding defects such as wrinkles or delamination when the membrane electrode is bonded, and the uniformity of bonding is improved. Meanwhile, without the need to increase additional air extraction channels and sealing assemblies, compared with a design scheme of double-side vacuum extraction, the uniformity of bonding is ensured while the overall equipment cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of conveying, and particularly relates to an equipment related to membrane electrode pressing, in particular to a fuel cell membrane electrode vacuum hot pressing device and a working method thereof. BACKGROUND

[0002] The membrane electrode is a core component of a hydrogen fuel cell and is a core place of multiple substance transmission and electrochemical reactions.

[0003] In the related art, a unilateral vacuum extraction design is generally used, that is, a vacuum extraction port is arranged on one side of a hot pressing groove, and a vacuum pump is connected to extract air. However, this design has inherent defects: because the gap between the hot pressing plate and the hot pressing groove is relatively narrow, when vacuum extraction is performed, the air flow is prone to form a turbulent flow at the narrow gap, resulting in uneven pressure distribution inside the hot pressing groove, so that the gas on the side far from the vacuum extraction port cannot be effectively extracted, forming a dead zone and residual bubbles, thereby causing uneven stress on the left and right sides of the membrane electrode during hot pressing, affecting the uniformity of bonding.

[0004] If a bilateral vacuum extraction design scheme is used, independent air extraction channels, sealing members and valve systems need to be arranged on both sides of the hot pressing groove, which results in a substantial increase in the manufacturing cost of the equipment.

[0005] Therefore, how to solve the uneven bonding of the membrane electrode edge caused by unilateral vacuum extraction is a technical problem to be solved at present.

[0006] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background of the present application, and therefore, the above description is not considered to constitute prior art information. SUMMARY

[0007] The present application provides at least a fuel cell membrane electrode vacuum hot pressing device and a working method thereof.

[0008] In a first aspect, the present application provides a fuel cell membrane electrode vacuum hot pressing device, comprising:

[0009] a vacuum hot pressing device body;

[0010] a hot pressing plate arranged above the vacuum hot pressing device body;

[0011] The vacuum hot pressing device body comprises:

[0012] a hot pressing groove arranged at the top of the vacuum hot pressing device body;

[0013] a vacuum pump in communication with a vacuum extraction port on one side of the hot pressing groove;

[0014] The top of the hot pressing plate is provided with a communication pipe in communication with both ends of the bottom surface of the two sides of the hot pressing plate.

[0015] A control module is configured to control the vacuum pump to vacuumize the hot pressing groove after the membrane electrode is put into the hot pressing groove, and to communicate the two sides of the hot pressing groove through the communication pipe to avoid the formation of dead zones between the hot pressing groove and the hot pressing plate.

[0016] One end of the communication pipe is arranged close to the vacuumizing port.

[0017] In an optional embodiment, the number of the communication pipes is two.

[0018] The two communication pipes are arranged on the opposite sides of the hot pressing plate.

[0019] The communication pipes are arranged obliquely outward.

[0020] In an optional embodiment, the vacuum hot pressing device body further comprises:

[0021] a top plate, a heating plate and a bottom plate.

[0022] The top plate is arranged opposite to the bottom plate.

[0023] The heating plate is arranged between the top plate and the bottom plate.

[0024] The hot pressing groove is opened in the top surface of the top plate.

[0025] In an optional embodiment, a plurality of insertion holes for the insertion of heating pipes are opened in the heating plate.

[0026] The plurality of insertion holes are arranged equidistantly side by side in the heating plate.

[0027] In an optional embodiment, a gas passage in communication with the vacuumizing port is opened in one side of the heating plate.

[0028] A vacuumizing valve and a vacuum discharging valve in communication with the gas passage are opened in one side of the heating plate.

[0029] In an optional embodiment, the vacuum hot pressing device body further comprises:

[0030] a vacuum suction plate covering the hot pressing groove.

[0031] a vacuum generator.

[0032] The heating plate is further provided with a suction pipeline in communication with the vacuum suction plate.

[0033] The vacuum generator is arranged outside the heating plate and in communication with the suction pipeline.

[0034] In an alternative embodiment, the vacuum generator is further connected with a first adsorption ball valve and a second adsorption ball valve;

[0035] Before the vacuum pump is controlled to perform vacuumization on the hot pressing groove, the control module is further configured to control the first adsorption ball valve and the second adsorption ball valve to communicate the vacuum generator with the outside, and adsorb the membrane electrode covered on the vacuum suction plate.

[0036] In an alternative embodiment, the bottom surface of the vacuum suction plate is provided with a flow equalization groove;

[0037] The flow equalization groove is in communication with the adsorption pipeline;

[0038] The top surface of the vacuum suction plate is provided with a plurality of adsorption pinholes in communication with corresponding flow equalization grooves.

[0039] In an alternative embodiment, the hot pressing groove is further provided with a ring groove around the hot pressing groove;

[0040] The ring groove is provided with a sealing ring;

[0041] When the hot pressing plate is closed in the hot pressing groove, the sealing ring seals the narrow gap between the hot pressing plate and the hot pressing groove.

[0042] In a second aspect, the embodiments of the present disclosure further provide a working method applied to the fuel cell membrane electrode vacuum hot pressing device as described above, and the working method comprises:

[0043] The control module controls the vacuum hot pressing device body to heat to a preset temperature;

[0044] The lower die of the membrane electrode is arranged in the hot pressing groove, and after the hot pressing plate is closed in the hot pressing groove, the control module controls the vacuum pump to perform vacuumization on the hot pressing groove, and communicates the two sides of the hot pressing groove through the communication pipeline;

[0045] The control module controls the flat pressing machine to press the vacuum hot pressing device body and the hot pressing plate.

[0046] The fuel cell membrane electrode vacuum hot pressing device and the working method thereof have the following beneficial effects: by arranging the communication pipeline on both sides of the hot pressing plate, the uniformity of the negative pressure distribution in the hot pressing groove is improved, so as to avoid the formation of a dead zone between the hot pressing groove and the hot pressing plate, thereby ensuring the uniformity of the pressure distribution in the hot pressing groove, avoiding defects such as wrinkles or delamination of the membrane electrode during lamination, improving the uniformity of the bonding, and at the same time, without the need to increase additional air suction channels and sealing components, compared with the design scheme of double-side vacuumization, the uniformity of the bonding is ensured while the overall equipment cost is reduced.

[0047] Other features and advantages of the present application will be set forth in the descriptions that follow, and in part will be apparent from the description or can be learned by practice of the application. The purposes and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

[0048] To make the above objectives, features and advantages of the present application more obvious and comprehensible, the preferred embodiments are specifically described in the following with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0050] Figure 1 A structural schematic diagram of a fuel cell membrane electrode vacuum hot pressing device provided by an embodiment of the present disclosure is shown in the figure.

[0051] Figure 2 A sectional view of the fuel cell membrane electrode vacuum hot pressing device provided by the embodiment of the present disclosure is shown in the figure.

[0052] Figure 3 A sectional view of the fuel cell membrane electrode vacuum hot pressing device provided by the embodiment of the present disclosure is shown in the figure.

[0053] Figure 4 A schematic diagram of a partial structure of the fuel cell membrane electrode vacuum hot pressing device provided by the embodiment of the present disclosure is shown in the figure.

[0054] Figure 5 A flowchart of a working method of the fuel cell membrane electrode vacuum hot pressing device provided by the embodiment of the present disclosure is shown in the figure.

[0055] Figure 6 An electric control principle diagram of the fuel cell membrane electrode vacuum hot pressing device provided by the embodiment of the present disclosure is shown in the figure.

[0056] In the figure: 100, vacuum hot pressing device body; 110, hot pressing groove; 111, ring groove; 112, sealing ring; 120, vacuum extraction port; 121, air passage; 122, vacuum extraction valve; 123, vacuum exhaust valve; 130, top plate; 140, heating plate; 141, jack; 150, bottom plate; 160, vacuum suction plate; 161, flow equalizing groove; 162, adsorption pinhole; 170, vacuum generator; 171, adsorption pipeline; 172, first adsorption ball valve; 173, second adsorption ball valve; 200, hot pressing plate; 210, communication pipe. DETAILED DESCRIPTION

[0057] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of the present application.

[0058] In this document, when a first component is referred to as being "on" a second component, it can be directly on the second component or a third component can be interposed between the first component and the second component. Also, in the drawings, the thickness of components can be exaggerated or reduced for effective description of the technical content.

[0059] In this document, when an element or layer is referred to as being "on", "engaged to", "connected to", "attached to", or "coupled to" another element or layer, it can be directly on, engaged, connected, attached, or coupled to the other element or layer, or one or more intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on", "directly engaged to", "directly connected to", "directly attached to", or "directly coupled to" another element or layer, there are no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., "between" versus "directly between", "adjacent" versus "directly adjacent", etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0060] In this document, example embodiments of the present disclosure will be described in greater detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of", when preceded by the term comprising, are intended to cover the interrelated items that are encompassed by the alternative of the term comprising. For example, the expression "at least one of a, b, and c" is intended to mean a, b, or c individually, or any combination of a, b, and c. As used herein, expressions such as "at least one of" when followed by a list of elements are intended to cover the interrelated items that are encompassed by the alternative of the term comprising. For example, the expression "at least one of a, b, and c" is intended to mean a, b, or c individually, or any combination of a, b, and c. As used herein, the expression "comprising at least one of a, b, and c" is intended to mean a, b, or c individually, or any combination of a, b, and c.

[0061] The terminology used herein is for the purpose of describing particular example configurations only and is not intended to be limiting. As used herein, the singular articles "a", "an", and "the" can be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "including", "comprising", and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are discussed or illustrated, unless specifically identified as an order of performance. Additional or alternative steps can be employed.

[0062] As used herein, the phrases "in one embodiment", "according to one embodiment", "in some embodiments", and the like are generally intended to refer to the fact that a described feature, structure, or characteristic can be included in at least one embodiment of the disclosure. Thus, features, structures, or characteristics can be included in more than one embodiment of the disclosure, and this phrasing is not necessarily intended to refer to the same embodiment. As used herein, the terms "for example," "e.g.," "for instance," and the like are used to indicate one or more examples, instances, or illustrations. Any implementation, aspect or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations, aspects or designs. Rather, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0063] It is found through research that the upper and lower surfaces of the membrane electrode body need to be covered with a frame film, and then pressed by a flat press to complete the preparation of the membrane electrode. However, only by pressing with a flat press, the prepared membrane electrode has more wrinkles, in order to reduce the wrinkles, the related technology adopts a vacuum adsorption method to adsorb the frame film. It is found in actual use that the design of single-sided vacuum extraction can easily form turbulent flow at the narrow gap during vacuum extraction, resulting in uneven pressure distribution inside the hot pressing groove, so that the gas far away from the vacuum extraction port cannot be effectively extracted, forming a dead zone and residual bubbles. The design of double-sided vacuum extraction will increase the overall equipment cost, therefore, how to balance the cost and the elimination effect of wrinkles is an urgent problem to be solved at present.

[0064] Based on the above research, the fuel cell membrane electrode vacuum hot pressing device and its working method provided by the embodiments of the disclosure reduce the increase in cost by setting a communication pipe on both sides of the hot pressing plate while achieving the effect of double-sided vacuum extraction.

[0065] The defects of the above solutions are the results of the inventors after practice and careful research, therefore, the discovery process of the above problems and the solutions proposed by the disclosure in this paper to solve the above problems should be the contribution of the inventors to the disclosure in the process of the disclosure.

[0066] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0067] Some embodiments of the disclosure will be described in detail below with reference to the accompanying drawings. In the case of no conflict, the embodiments described below and the features in the embodiments can be combined with each other.

[0068] Please refer to Figure 1 and Figure 2At least one embodiment provides a fuel cell membrane electrode vacuum hot pressing device, comprising: a vacuum hot pressing device body 100; a hot pressing plate 200 arranged above the vacuum hot pressing device body 100; wherein the vacuum hot pressing device body 100 comprises: a hot pressing groove 110 arranged at the top of the vacuum hot pressing device body 100; a vacuum pump in communication with a vacuumizing port 120 on one side of the hot pressing groove 110; the top of the hot pressing plate 200 is provided with a communication pipe 210 in communication with both ends of the bottom surface of the hot pressing plate 200; a control module is configured to control the vacuum pump to vacuumize the hot pressing groove 110 after the membrane electrode is placed in the hot pressing groove 110, and to communicate both sides of the hot pressing groove 110 through the communication pipe 210 to avoid the formation of a dead zone between the hot pressing groove 110 and the hot pressing plate 200.

[0069] Wherein one end of the communication pipe is arranged close to the vacuumizing port, thereby communicating both sides of the hot pressing groove 110.

[0070] Wherein the electric control schematic diagram of the fuel cell membrane electrode vacuum hot pressing device is as shown in Figure 6

[0071] By arranging the communication pipe 210 on both sides of the hot pressing plate 200, the uniformity of the negative pressure distribution in the hot pressing groove 110 is improved, thereby ensuring the uniformity of the pressure distribution in the hot pressing groove 110 to avoid the formation of a dead zone between the hot pressing groove and the hot pressing plate, avoid wrinkles or delamination defects when the membrane electrode is attached, improve the uniformity of the bonding, and at the same time, without the need to increase additional air suction channels and sealing components, compared with the design scheme of double-side vacuumizing, while ensuring the uniformity of the bonding, the overall equipment cost is reduced.

[0072] Please continue to refer to Figure 1 The number of communication pipes 210 is two; two communication pipes 210 are arranged on opposite sides of the hot pressing plate 200; and the communication pipes 210 are arranged outwardly inclined.

[0073] Wherein the material of the hot pressing plate 200 is an aluminum plate, after multiple hot pressing, a concave part will appear in the middle of the aluminum plate, by external force, the two communication pipes 210 are bent outwardly, thereby reversely bending the concave aluminum plate, and further ensuring the uniformity of the pressure distribution of the hot pressing plate 200 on each part of the hot pressing groove 110.

[0074] Please continue to refer to Figure 1 The vacuum hot pressing device body 100 further comprises: a top plate 130, a heating plate 140 and a bottom plate 150; the top plate 130 and the bottom plate 150 are arranged oppositely; the heating plate 140 is arranged between the top plate 130 and the bottom plate 150; the hot pressing groove 110 is opened in the top surface of the top plate 130.

[0075] ​Specifically, please refer to Figure 3 , the heating plate 140 is provided with a plurality of insertion holes 141 for inserting the heating pipes; the plurality of insertion holes 141 are arranged in the heating plate 140 at equal intervals. By arranging the heating pipes at equal intervals, the uniformity of the surface temperature of the heating plate 140 is ensured, thereby ensuring the uniform melting of the thermoplastic resin between the membrane electrode layers and completing the bonding.

[0076] Please refer to Figure 3 and Figure 4 , one side of the heating plate 140 is provided with an air passage 121 which is in communication with the vacuum suction port 120; one side of the heating plate 140 is provided with a vacuum suction valve 122 and a vacuum exhaust valve 123 which are in communication with the air passage 121. By using the vacuum suction valve 122 and the vacuum exhaust valve 123 in cooperation, the switching of the vacuum state of the hot-pressing groove 110 is completed.

[0077] In order to avoid the deviation of the membrane electrode during hot pressing, please refer to Figure 2 and Figure 4 , in the preferred embodiment, the vacuum hot-pressing device body 100 further comprises: a vacuum suction plate 160 which covers the hot-pressing groove 110; a vacuum generator 170; the heating plate 140 is further provided with a suction pipeline 171 which is in communication with the vacuum suction plate 160; wherein the vacuum generator 170 is arranged outside the heating plate 140 and is in communication with the suction pipeline 171.

[0078] By connecting the vacuum suction plate 160 and the vacuum generator 170 through the suction pipeline 171, the suction of the membrane electrode is completed, thereby ensuring that the membrane electrode will not deviate during subsequent hot pressing.

[0079] In the preferred embodiment, the bottom surface of the vacuum suction plate 160 is provided with a uniform flow groove 161; the uniform flow groove 161 is in communication with the suction pipeline 171; the top surface of the vacuum suction plate 160 is provided with a plurality of suction pinholes 162 which are in communication with the corresponding uniform flow grooves 161. By uniformly distributing the suction pressure to the entire vacuum suction plate 160 through the uniform flow groove 161, the uniformity of the suction is improved.

[0080] It should be noted that the uniform flow groove 161 is in the form of a grid, and each air passage is in communication with each other, and the suction pinhole 162 is in communication with the corresponding air passage.

[0081] Please continue to refer to Figure 2 and Figure 4 , the vacuum generator 170 is further connected with a first suction ball valve 172 and a second suction ball valve 173; before the control module controls the vacuum pump to perform vacuum suction on the hot-pressing groove 110, the control module is further configured to control the first suction ball valve 172 and the second suction ball valve 173 to communicate the vacuum generator 170 with the outside, and to perform suction on the membrane electrode which covers the vacuum suction plate 160.

[0082] Please refer to Figure 1 and Figure 4 , the heat pressing groove 110 is also provided with a ring groove 111 around; the ring groove 111 is provided with a sealing ring 112; when the heat pressing plate 200 covers the heat pressing groove 110, the sealing ring 112 seals the narrow gap between the heat pressing plate 200 and the heat pressing groove 110.

[0083] When the heat pressing plate 200 covers the heat pressing groove 110, the sealing ring 112 seals the gap between the heat pressing plate 200 and the heat pressing groove 110, and when the vacuum pump pumps the heat pressing groove 110, the reliability of the sealing between the heat pressing plate 200 and the heat pressing groove 110 can be ensured.

[0084] Please refer to Figure 5 The embodiment of the disclosure also provides a working method applied to the vacuum heat pressing device for the fuel cell membrane electrode as described above, and the working method comprises:

[0085] S110: control the vacuum heat pressing device body to heat to a preset temperature through the control module.

[0086] S120: the lower die of the membrane electrode is arranged in the heat pressing groove, and after the heat pressing plate covers the heat pressing groove, the control module controls the vacuum pump to pump the heat pressing groove, and the two sides of the heat pressing groove are communicated through the communication pipe.

[0087] S130: the control module controls the flat pressing machine to press the vacuum heat pressing device body and the heat pressing plate.

[0088] In summary, the application provides a fuel cell membrane electrode vacuum hot pressing device and a working method thereof, wherein the fuel cell membrane electrode vacuum hot pressing device comprises: a vacuum hot pressing device body 100; a hot pressing plate 200 arranged above the vacuum hot pressing device body 100; wherein the vacuum hot pressing device body 100 comprises: a hot pressing groove 110 arranged at the top of the vacuum hot pressing device body 100; a vacuum pump in communication with a vacuumizing port 120 at one side of the hot pressing groove 110; the top of the hot pressing plate 200 is provided with a communication pipe 210 in communication with both ends of the bottom surface of the hot pressing plate 200; a control module is configured to control the vacuum pump to vacuumize the hot pressing groove 110 after the membrane electrode is placed in the hot pressing groove 110, and the two sides of the hot pressing groove 110 are communicated through the communication pipe 210 to avoid the formation of a dead zone between the hot pressing groove 110 and the hot pressing plate 200. By arranging the communication pipe 210 on both sides of the hot pressing plate 200, the uniformity of the negative pressure distribution in the hot pressing groove 110 is improved, thereby ensuring the uniformity of the pressure distribution in the hot pressing groove 110, avoiding the formation of a dead zone between the hot pressing groove and the hot pressing plate, avoiding wrinkles or delamination defects when the membrane electrode is attached, improving the uniformity of the bonding, and at the same time, without the need to increase additional air suction channels and sealing components, compared with the design scheme of double-side vacuumization, the uniformity of the bonding is ensured while the overall equipment cost is reduced.

[0089] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0090] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, terms such as "first", "second" and other numerical terms are used herein, unless otherwise indicated herein. Therefore, the first element, component, region, layer or section discussed above can be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0091] Spatially relative terms, such as "inner," "outer," "beneath," "below," "lower," "above," "upper," and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms can be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0092] In the above discussion, unless otherwise stated, the terms "about," "approximately," "substantially" and the like mean a variation of + / - 10% of the value stated.

[0093] With the above ideal embodiments according to the present application as the inspiration, through the above description, relevant personnel can certainly make various changes and modifications within the scope of not deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of claims.

Claims

1. A fuel cell membrane electrode vacuum hot pressing device, characterized in that: include: Vacuum hot pressing device body (100); A hot pressing plate (200) disposed above the vacuum hot pressing device body (100); Wherein, the vacuum hot pressing device body (100) comprises: A hot pressing tank (110) is provided on the top of the vacuum hot pressing device body (100); a vacuum pump connected to a vacuum port (120) on one side of the hot pressing tank (110); A connecting pipe (210) is provided on the top of the hot pressing plate (200) and is connected to both ends of the bottom surface of the hot pressing plate (200); A control module is configured to: after placing the membrane electrode into the hot pressing tank (110), control the vacuum pump to evacuate the hot pressing tank (110), and connect the two sides of the hot pressing tank (110) through a connecting pipe (210) to avoid forming a dead zone between the hot pressing tank (110) and the hot pressing plate (200); Wherein, one end of the connecting pipe (210) is arranged close to the vacuum port (120); The number of the connecting pipes (210) is two; Two connecting pipes (210) are respectively arranged on two opposite sides of the hot pressing plate (200); Furthermore, the connecting pipe (210) is arranged to be inclined outward.

2. The fuel cell membrane electrode vacuum hot pressing device according to claim 1, characterized in that: The vacuum hot pressing device body (100) further includes: A top plate (130), a heating plate (140), and a bottom plate (150); The top plate (130) and the bottom plate (150) are arranged opposite to each other; The heating plate (140) is arranged between the top plate (130) and the bottom plate (150); The hot pressing groove (110) is opened on the top surface of the top plate (130).

3. The fuel cell membrane electrode vacuum hot pressing device according to claim 2, characterized in that: The heating plate (140) is provided with a plurality of insertion holes (141) for inserting heating tubes; A plurality of the jacks (141) are arranged side by side at equal intervals in the heating plate (140).

4. The fuel cell membrane electrode vacuum hot pressing device according to claim 2, characterized in that: An air passage (121) communicating with the vacuum port (120) is provided on one side of the heating plate (140); A vacuum pumping valve (122) and a vacuum exhaust valve (123) in communication with the air passage (121) are provided on one side of the heating plate (140).

5. The fuel cell membrane electrode vacuum hot pressing device according to claim 2, characterized in that: The vacuum hot pressing device body (100) further includes: A vacuum suction plate (160) covering the hot pressing tank (110); Vacuum generator (170); The heating plate (140) is further provided with an adsorption pipe (171) in communication with the vacuum suction plate (160); The vacuum generator (170) is arranged outside the heating plate (140) and is in communication with the adsorption pipe (171).

6. The fuel cell membrane electrode vacuum hot pressing device according to claim 5, characterized in that: The vacuum generator (170) is also connected to a first adsorption ball valve (172) and a second adsorption ball valve (173); Before controlling the vacuum pump to evacuate the hot pressing tank (110), the control module is further configured to control the first adsorption ball valve (172) and the second adsorption ball valve (173) to connect the vacuum generator (170) to the outside, thereby adsorbing the membrane electrode covered on the vacuum suction plate (160).

7. The fuel cell membrane electrode vacuum hot pressing device according to claim 6, characterized in that: The bottom surface of the vacuum suction plate (160) is provided with a flow balancing groove (161); The flow balancing groove (161) is in communication with the adsorption pipe (171); The top surface of the vacuum suction plate (160) is provided with a plurality of adsorption pinholes (162) that are in communication with corresponding flow balancing grooves (161).

8. The fuel cell membrane electrode vacuum hot pressing device according to claim 7, characterized in that: The hot pressing groove (110) is further provided with an annular groove (111) around its periphery; A sealing ring (112) is provided in the annular groove (111); When the hot pressing plate (200) is covered in the hot pressing groove (110), the narrow gap between the hot pressing plate (200) and the hot pressing groove (110) is sealed by the sealing ring (112).

9. A working method for the fuel cell membrane electrode vacuum hot pressing device according to claim 1, characterized in that: The working method comprises: Controlling the vacuum hot pressing device body (100) to heat to a preset temperature through the control module; The lower mold of the membrane electrode is arranged in the hot pressing tank (110), and after the hot pressing plate (200) is covered in the hot pressing tank (110), the control module controls the vacuum pump to evacuate the hot pressing tank (110), and connects the two sides of the hot pressing tank (110) through the connecting pipe (210); The control module controls the flat press to press the vacuum hot pressing device body (100) and the hot pressing plate (200).

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