Packaging structure, manufacturing method thereof, packaging assembly and processing method thereof

Abstract

The invention provides a packaging structure and a manufacturing method thereof, and a packaging assembly and a processing method thereof, and the manufacturing method comprises the steps: fixedly arranging packaging frames on the two surfaces of a catalyst coating film, and enabling the edges of the packaging frames to extend to the outer side of the catalyst coating film; protection parts are fixedly arranged on the two surfaces of the middle film body, and the protection parts completely cover the middle film body; supporting parts are arranged on the two sides of the catalyst coating film in the thickness direction of the catalyst coating film, the supporting parts are fixed to the second frame body and the protection part, and the supporting parts completely cover the second frame body and the protection part; the formed middle structure is placed in a glue injection mold, the glue injection mold clamps a supporting part and a fourth frame body of the middle structure, and a third frame body of the middle structure is located in a glue injection space of the glue injection mold; injecting glue into the glue injection space to form a packaging piece; and demolding the packaging piece.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to a packaging structure and a manufacturing method thereof, a packaging component and a processing method thereof. Background Art

[0002] As a highly efficient energy conversion device, fuel cells have attracted widespread attention due to their zero emissions and high energy density.

[0003] The battery stack is a whole composed of single cells consisting of multiple bipolar plates and membrane electrode assemblies connected in series. It increases the number of single cells to improve voltage and power output, and is a key structure for achieving electrical energy conversion.

[0004] The bipolar plate is a key structural component of the battery stack. It provides gas distribution channels to ensure that the hydrogen and oxygen required for the electrochemical reaction are separated on both sides of the membrane electrode assembly. It also conducts current and provides mechanical support, playing a vital role in battery performance and durability.

[0005] The membrane electrode assembly (MEA) consists of two electrodes, the anode (positive electrode) and the cathode (negative electrode), and is the key place for electrochemical reactions. The anode catalyzes the hydrogen oxidation reaction, and the cathode catalyzes the oxygen reduction reaction, transferring protons through the proton exchange membrane to generate current.

[0006] The electrode consists of a catalyst layer, a gas diffusion layer and a proton exchange membrane. The catalyst layer promotes the redox reaction of hydrogen and oxygen, the gas diffusion layer provides mechanical strength and gas transmission channels, and the proton exchange membrane is responsible for conducting protons and separating the reaction gases.

[0007] The common flow channel refers to the channel used to uniformly distribute fluids such as hydrogen, air and coolant to each single cell in the fuel cell stack. It ensures the uniform distribution of reaction gases and coolant, and plays an important role in the performance and durability of the fuel cell stack.

[0008] As the core component of the fuel cell, the stack is composed of dozens to hundreds of bipolar plates and membrane electrode assemblies (MEAs) alternating with each other. The bipolar plates and MEAs must be sealed to prevent hydrogen or air from leaking into the atmosphere from between the bipolar plates and MEAs, and from leaking from one side of the MEA through the edge to the other side.

[0009] The composition of the medium flowing in the common flow channel of hydrogen or air in the fuel cell stack is complex, including hydrogen, air, nitrogen, acidic water, etc. The flow rate of hydrogen or air is as high as tens to hundreds of meters per second, and the total length of a single interface seal is as high as several kilometers. Its sealing performance directly affects the safety, reliability and service life of the fuel cell. Summary of the invention

[0010] The main purpose of the present invention is to provide a packaging structure and a manufacturing method thereof, a packaging component and a processing method thereof, so as to protect the catalyst coating film from being affected by factors such as ambient temperature, humidity and cleanliness during the glue injection process.

[0011] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a method for manufacturing a packaging structure is provided, the manufacturing method comprising: step S1: fixing a packaging frame on both surfaces of the catalyst coating membrane, and extending the edge of the packaging frame to the outside of the catalyst coating membrane; the catalyst coating membrane comprises an edge membrane body and a middle membrane body connected to each other, the edge membrane body is arranged around the middle membrane body, and the middle membrane body is arranged opposite to the hollow part of the packaging frame; step S2: fixing a protective part on both surfaces of the middle membrane body, the protective part completely covers the middle membrane body; and along the thickness direction of the catalyst coating membrane, supporting parts are arranged on both sides of the catalyst coating membrane, the supporting parts are fixed on the second frame and the protective part, and The supporting part completely covers the second frame and the protective part; the packaging frame includes a first frame and a second frame connected to each other, and the first frame is arranged around the second frame; step S3: placing the intermediate structure formed in step S2 in a glue injection mold, the glue injection mold clamps the supporting part and the fourth frame of the intermediate structure, and the third frame of the intermediate structure is located in the glue injection space of the glue injection mold; a package is formed by injecting glue into the glue injection space, and the package is clamped on the third frame; the first frame includes a third frame and a fourth frame connected to each other, and the third frame is arranged around the fourth frame; step S4: demolding the package; the packaging structure includes a catalyst coating film, two packaging frames, two protective parts, two supporting parts, and a package.

[0012] Further, step S2 includes: step S21: obtaining two preset double-layer parts; wherein, the edge of the preset double-layer part is flush with the edge of the packaging frame, or, the edge of the preset double-layer part extends to the outside of the edge of the packaging frame; the preset double-layer part includes a protective part and a supporting part that are interconnected; step S22: cutting off the protective part portion to be cut so that the preset double-layer part forms a preset double-layer part of an intermediate form; the protective part includes a protective part portion to be cut and a protective portion that are interconnected, and the protective part portion to be cut is arranged around the protective portion; step S23: arranging the two preset double-layer parts of the intermediate form on both sides of the catalyst coating membrane respectively; wherein, the protective portion completely covers the surface of the middle membrane body, and the supporting part completely covers the surface of the packaging frame and the surface of the protective part; step S24: cutting off the supporting part portion to be cut; the supporting part includes a supporting part portion to be cut and a supporting portion that are interconnected, and the supporting part portion to be cut is arranged around the supporting portion.

[0013] Furthermore, the protective member is a protective film, the supporting member is a supporting film, and the preset double-layer member is a double-layer film; the protective film and the supporting film are bonded together.

[0014] Furthermore, a positioning hole is provided on the support member so that positioning can be performed through the positioning hole during the process of cutting off the support member portion to be cut.

[0015] Furthermore, in step S1, packaging frames are bonded to both surfaces of the edge film body of the catalyst coating film.

[0016] Furthermore, in step S2, the protective parts are bonded to both surfaces of the middle film body.

[0017] Further, in step S2, the supporting portion is bonded to the second frame and the protecting portion.

[0018] According to another aspect of the present invention, a packaging structure is provided, which is manufactured using the above manufacturing method.

[0019] According to a third aspect of the present invention, a processing method for a packaging component is provided, which comprises: the manufacturing method of the above-mentioned packaging structure; step S5: removing the supporting portion and the protecting portion from the packaging frame and the catalyst coating membrane; step S6: arranging gas diffusion members on both sides of the catalyst coating membrane along the thickness direction of the catalyst coating membrane; the gas diffusion member is fixed on the second frame body and / or the middle membrane body, and the gas diffusion member completely covers the middle membrane body; the packaging component comprises a catalyst coating membrane, two packaging frames, a packaging component, and two gas diffusion members; the packaging component is used to be arranged between the bipolar plates of a fuel cell stack.

[0020] According to a fourth aspect of the present invention, there is provided a packaging component which is processed by the above-mentioned processing method.

[0021] Furthermore, the package includes a first packaging part and a second packaging part connected to each other, the first packaging part is arranged around the second packaging part; the second packaging part is clamped on the third frame; a protrusion is protruding from the first packaging part, and the protrusion is used to contact the bipolar plate.

[0022] Furthermore, there are multiple protrusions, and the multiple protrusions are distributed along the distribution direction of the first packaging part and the second packaging part.

[0023] Further, the protrusion includes a first protrusion and a second protrusion, and the protrusion directions of the first protrusion and the second protrusion are opposite.

[0024] Furthermore, the protrusions are extended along the circumference of the catalyst coating membrane and connected end to end.

[0025] Furthermore, the packaging member is extended along the circumference of the catalyst coating membrane and connected end to end.

[0026] Furthermore, the packaging frame is an integrated structure.

[0027] By applying the technical solution of the present invention, the catalyst coating membrane is sealed by providing a protection part and a support part, so that the catalyst coating membrane is not affected by the temperature, humidity, and cleanliness of the transportation and injection environment, thereby protecting the catalyst coating membrane. Since the catalyst coating membrane is a soft membrane, the rigidity is improved by providing a protection part and a support part, thereby facilitating positioning in the injection mold, thereby improving the positioning accuracy in the injection mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 A schematic structural diagram of a membrane electrode assembly is shown;

[0030] Figure 2 A partial structural schematic diagram of a packaging assembly according to the present invention is shown ( Figure 1 Longitudinal section view at AA in the middle);

[0031] Figure 3 Shows Figure 2 Schematic diagram of the packaging assembly and the structure of the bipolar plate before packaging (uncompressed);

[0032] Figure 4 Shows Figure 2 Schematic diagram of the structure of the packaging assembly and the bipolar plate after packaging (after compression);

[0033] Figure 5 It shows a schematic diagram of the structure after step S1 in the manufacturing process of the packaging structure according to the present invention;

[0034] Figure 6 A schematic structural diagram of a preset double-layer member in an intermediate form according to the present invention is shown;

[0035] Figure 7 A schematic diagram showing step S23 in the process of manufacturing the packaging structure according to the present invention is shown;

[0036] Figure 8 A schematic structural diagram of an intermediate structure according to the present invention is shown;

[0037] Fig. 9 A schematic diagram showing a structure in which an intermediate structure according to the present invention is placed in a glue injection mold;

[0038] Fig.10 A schematic structural diagram of a positioning hole on a support member according to the present invention is shown.

[0039] The above drawings include the following reference numerals:

[0040] 100. Packaging components; 2. Intermediate structure;

[0041] 10, catalyst coating membrane; 11, edge membrane body; 111, first membrane body; 1111, third membrane body; 1112, fourth membrane body; 112, second membrane body; 12, middle membrane body;

[0042] 20. Encapsulation frame; 21. First frame; 211. Third frame; 2111. Fifth frame; 2112. Sixth frame; 212. Fourth frame; 22. Second frame;

[0043] 30. packaging member; 31. first packaging portion; 311. protrusion; 312. first protrusion; 313. second protrusion; 32. second packaging portion; 40. gas diffuser;

[0044] 90. first preset double-layer member; 91. protection portion; 92. support portion; 921. support member; 922. positioning hole; 923. positioning portion;

[0045] 50. Public flow channel;

[0046] 200, plate;

[0047] 600, glue injection mold; 610, glue injection space; 620, upper mold; 630, lower mold; 640, injection port; 650, cooling module. DETAILED DESCRIPTION

[0048] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0049] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0050] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0051] The present invention provides a packaging structure, please refer to Figure 2The packaging structure includes a catalyst coating membrane 10 and two packaging frames 20; the catalyst coating membrane 10 includes a proton exchange membrane and a catalyst layer coated on two surfaces of the proton exchange membrane; the catalyst coating membrane 10 is referred to as CCM.

[0052] Along the thickness direction of the catalyst coating membrane 10 , two packaging frames 20 are fixedly arranged on two surfaces of the catalyst coating membrane 10 , respectively; the edge of each packaging frame 20 extends to the outside of the catalyst coating membrane 10 .

[0053] The catalyst coating membrane 10 comprises an edge membrane body 11 and a middle membrane body 12 which are connected to each other, and the edge membrane body 11 is arranged around the middle membrane body 12. Optionally, only two surfaces of the proton exchange membrane of the middle membrane body 12 are coated with a catalyst layer.

[0054] The body of the packaging frame 20 encloses a hollow portion, and the middle film body 12 is disposed opposite to the hollow portion of the packaging frame 20. The body of the packaging frame 20 is disposed opposite to the edge film body 11 and is fixedly connected.

[0055] Specifically, the packaging frame 20 includes a first frame body 21 and a second frame body 22 connected to each other, and the first frame body 21 is arranged around the second frame body 22. The edge film body 11 includes a first film body 111 and a second film body 112 connected to each other, and the first film body 111 is arranged around the second film body 112; the second film body 112 is connected to the middle film body 12, and the second film body 112 is arranged around the middle film body 12; that is, the catalyst coating membrane 10 includes a first film body 111, a second film body 112 and a middle film body 12 connected in sequence. The first frame body 21 is arranged opposite to the first film body 111, and the second frame body 22 is arranged opposite to the second film body 112.

[0056] Specifically, the first frame body 21 includes a third frame body 211 and a fourth frame body 212 that are connected to each other, and the third frame body 211 is arranged around the fourth frame body 212; the fourth frame body 212 is connected to the second frame body 22, and the fourth frame body 212 is arranged around the second frame body 22; that is, the packaging frame 20 includes the third frame body 211, the fourth frame body 212 and the second frame body 22 connected in sequence.

[0057] Specifically, the first membrane body 111 includes a third membrane body 1111 and a fourth membrane body 1112 connected to each other, the third membrane body 1111 is arranged around the fourth membrane body 1112; the fourth membrane body 1112 is connected to the second membrane body 112, and the fourth membrane body 1112 is arranged around the second membrane body 112; that is, the catalyst coating membrane 10 includes a third membrane body 1111, a fourth membrane body 1112, a second membrane body 112 and a middle membrane body 12 connected in sequence. The third membrane body 1111 is arranged opposite to the third frame body 211, and the fourth membrane body 1112 is arranged opposite to the fourth frame body 212.

[0058] Specifically, the third frame 211 includes a fifth frame 2111 and a sixth frame 2112 connected to each other, and the fifth frame 2111 is arranged around the sixth frame 2112; the sixth frame 2112 is connected to the fourth frame 212, and the sixth frame 2112 is arranged around the fourth frame 212; that is, the packaging frame 20 includes the fifth frame 2111, the sixth frame 2112, the fourth frame 212 and the second frame 22 connected in sequence. The sixth frame 2112 is arranged opposite to the third film 1111, and the fifth frames 2111 of the two packaging frames 20 are arranged opposite to each other.

[0059] Specifically, the packaging structure further includes two protection parts 91 ; along the thickness direction of the catalyst coating membrane 10 , the two protection parts 91 are respectively fixedly arranged on two surfaces of the middle membrane body 12 ; the protection parts 91 completely cover the middle membrane body 12 .

[0060] Specifically, the packaging structure also includes two support parts 92; along the thickness direction of the catalyst coating membrane 10, the two support parts 92 are respectively located on both sides of the catalyst coating membrane 10; the support parts 92 are fixed on the second frame 22 and the protective part 91, and the support parts 92 completely cover the second frame 22 and the protective part 91.

[0061] Specifically, the packaging structure further includes a packaging member 30 , and the two packaging frames 20 are both disposed in the packaging member 30 , so that the packaging member 30 wraps the third frame 211 of the two packaging frames 20 . That is, the packaging member 30 seals the edges of the two packaging frames 20 .

[0062] Optionally, the packaging frame 20 is bonded to the catalyst coating membrane 10 , that is, the packaging frame 20 is bonded to the edge membrane body 11 .

[0063] The present invention also provides a packaging assembly 100 , which is used to be arranged between bipolar plates of a fuel cell stack, wherein the bipolar plates are two polar plates 200 ; the distribution direction of the bipolar plates is parallel to or the same as the thickness direction of the catalyst coating membrane 10 .

[0064] like Figures 1 to 4 As shown, the packaging assembly 100 includes a catalyst coating membrane 10, two packaging frames 20, a packaging member 30, and two gas diffusers 40. Along the thickness direction of the catalyst coating membrane 10, the two gas diffusers 40 are respectively located on both sides of the catalyst coating membrane 10; the gas diffusers 40 are fixed on the second frame 22 and / or the middle membrane body 12, and the gas diffusers 40 completely cover the middle membrane body 12.

[0065] Specifically, the gas diffuser 40 is a porous structure, and the gas diffuser 40 is also called a gas diffusion layer.

[0066] Optionally, the packaging frame 20 is made of plastic, that is, the packaging frame 20 is a plastic frame.

[0067] Optionally, the packaging frame 20 is a polygonal structure. Optionally, a rectangular structure or a structure approximately rectangular. For example, the packaging frame 20 is a structure similar to a photo frame.

[0068] Specifically, along the thickness direction of the catalyst coating membrane 10, hydrogen and air are respectively located on both sides of the catalyst coating membrane 10; hydrogen and air are both reaction gases; the reaction gas contacts the surface of the middle membrane body 12 through the gas diffusion member 40, that is, hydrogen and air contact the two surfaces of the middle membrane body 12 respectively, and hydrogen and air react on the two surfaces of the middle membrane body 12 respectively to form protons; the protons formed on the two surfaces of the middle membrane body 12 are conducted through the proton exchange membrane; that is, protons are transferred through the middle membrane body 12 to generate current.

[0069] Optionally, the gas diffusion member 40 is bonded to the second frame 22 and / or the middle film body 12 , so that the gas diffusion member 40 is fixed on the second frame 22 and / or the middle film body 12 .

[0070] In the present application, the package 30 includes a first packaging part 31 and a second packaging part 32 which are connected to each other, and the first packaging part 31 is arranged around the second packaging part 32; the second packaging part 32 is clamped on the third frame 211; a protrusion 311 is protruded on the first packaging part 31, and the protrusion 311 is used to contact the bipolar plate, and the protruding direction of the protrusion 311 is perpendicular to the distribution direction of the first packaging part 31 and the second packaging part 32.

[0071] Optionally, there are multiple protrusions 311 , and the multiple protrusions 311 are distributed along the distribution direction of the first packaging portion 31 and the second packaging portion 32 .

[0072] Optionally, along the distribution direction of the bipolar plates, the protrusion 311 includes a first protrusion 312 and a second protrusion 313, the first protrusion 312 protrudes toward one polar plate 200, and the second protrusion 313 protrudes toward the other polar plate 200; the protrusion direction of the first protrusion 312 is opposite to the protrusion direction of the second protrusion 313.

[0073] Optionally, the surface of the first protrusion 312 is a part of a first spherical surface or an arc-shaped surface, and the surface of the second protrusion 313 is a part of a second spherical surface or an arc-shaped surface.

[0074] Optionally, the packaging component 30 is made of rubber.

[0075] Optionally, along the distribution direction of the bipolar plates, the thickness of the first packaging portion 31 is smaller than the thickness of the second packaging portion 32 .

[0076] Optionally, the protrusions 311 are extended along the circumference of the catalyst coating membrane 10 and connected end to end; that is, the protrusions 311 are annular structures.

[0077] Specifically, the packaging member 30 is extended along the circumference of the catalyst coating membrane 10 and connected end to end; that is, the packaging member 30 is a ring-shaped structure.

[0078] In the present application, the packaging frame 20 is an integrated structure, which is conducive to reducing the number of sealing interfaces, that is, by reducing the number of connection points or contact points, the number of parts that need to be sealed is reduced, thereby improving the sealing performance and sealing stability.

[0079] In the specific implementation process, Figure 3 and Figure 4 As shown, the packaging assembly 100 is disposed between two plates 200 ; the two plates 200 are compressed along the distribution direction of the two plates 200 so that the packaging member 30 is in sealing contact with both plates 200 , and the two gas diffusers 40 are in sealing contact with the two plates 200 , respectively.

[0080] On the one hand, the first packaging part 31 and the second packaging part 32 of the packaging part 30 jointly provide a large area of ​​flexible support, thereby improving the stability and vibration and impact resistance of the battery stack. On the other hand, due to the setting of the packaging part 30 and the packaging frame 20, the reaction gas on both sides of the catalyst coating membrane 10 cannot flow through the gaps around the catalyst coating membrane 10, thereby preventing hydrogen and air from flowing from the gaps around the catalyst coating membrane 10 to the other side of the catalyst coating membrane 10. On the third aspect, based on the setting of the packaging part 30, especially the setting of the first packaging part 31, the fluid in the common flow channel 50 on the left side of the packaging component 100 can be prevented from entering the right side space of the first packaging part 31, and at the same time, the fluid is prevented from scouring the protrusion 311, thereby avoiding the protrusion 311 from being scour and causing wear or aging to the protrusion 311, thereby avoiding the worn protrusion 311 from affecting the sealing effect. That is, the first packaging part 31 can play a sealing role.

[0081] Optionally, after compression, the compression rate of the first packaging part 31 is 0.4 to 0.6 of the compression rate of the gas diffuser 40 , the compression rate of the protrusion 311 is 2.0 to 2.8 of the compression rate of the gas diffuser 40 , and the compression rate of the second packaging part 32 is 0.6 to 0.9 of the compression rate of the gas diffuser 40 .

[0082] The present invention also provides a method for manufacturing a packaging structure, which is applicable to the above-mentioned packaging structure, that is, the above-mentioned packaging structure is manufactured using the manufacturing method. The manufacturing method of the packaging structure includes:

[0083] Step S1: Figure 5As shown, packaging frames 20 are fixedly arranged on both surfaces of the catalyst coating membrane 10 , and the edges of the packaging frames 20 extend to the outside of the catalyst coating membrane 10 .

[0084] Optionally, the width of the body of the packaging frame 20 is L0. For example, the value range of L0 is 1 mm to 5 mm.

[0085] Step S2: A protective portion 91 is fixedly provided on both surfaces of the middle membrane body 12, and the protective portion 91 completely covers the middle membrane body 12; and a supporting portion 92 is provided on both sides of the catalyst coating membrane 10 along the thickness direction of the catalyst coating membrane 10, and the supporting portion 92 is fixed on the second frame body 22 and the protective portion 91, and the supporting portion 92 completely covers the second frame body 22 and the protective portion 91.

[0086] like Figure 8 As shown, the intermediate structure 2 includes a catalyst coating membrane 10 , two packaging frames 20 , two protection portions 91 , and two support portions 92 .

[0087] Step S3: Fig. 9 As shown, the intermediate structure 2 formed in step S2 is placed in the glue injection mold 600, and the glue injection mold 600 clamps the support part 92 and the fourth frame 212 of the intermediate structure 2, and the third frame 211 of the intermediate structure 2 is located in the glue injection space 610 of the glue injection mold 600; the package 30 is formed by injecting glue into the glue injection space 610, and the package 30 is clamped on the third frame 211.

[0088] The packaging structure includes a catalyst coating film 10 , two packaging frames 20 , two protection portions 91 , two support portions 92 , and a packaging member 30 .

[0089] Specifically, the glue injection mold 600 includes an upper mold 620 and a lower mold 630 , and the upper mold 620 and the lower mold 630 enclose a glue injection space 610 ; the upper mold 620 and the lower mold 630 clamp the support portion 92 of the intermediate structure 2 and the fourth frame 212 .

[0090] Specifically, the glue injection mold 600 has an injection port 640 communicating with the glue injection space 610 , so that glue can be injected into the glue injection space 610 through the injection port 640 .

[0091] Specifically, the glue injection mold 600 includes a cooling module 650 , and the intermediate structure 2 is cooled by the cooling module 650 while the glue is being injected.

[0092] Specifically, at least part of the support portion 92 is arranged corresponding to the cooling module 650, and the protection portion 91 is arranged corresponding to the cooling module 650; while injecting glue, the cooling module 650 is used to control the temperature of the part of the intermediate structure 2 corresponding to the cooling module 650 to be below 80°C.

[0093] Specifically, the upper mold 620 and the lower mold 630 are both provided with cooling modules 650 ; along the thickness direction of the catalyst coating membrane 10 , the two cooling modules 650 are respectively located on both sides of the catalyst coating membrane 10 .

[0094] The protection part 91 and the support part 92 are provided to seal the catalyst coating membrane 10 . During the molding process of the package 30 , the catalyst coating membrane 10 is protected from factors such as ambient temperature, humidity and cleanliness, thereby improving the finished product quality of the catalyst coating membrane 10 .

[0095] The protective portion 91 and the supporting portion 92 are provided to seal the catalyst coating membrane 10 so that the catalyst coating membrane 10 is not affected by the temperature, humidity, and cleanliness of the transportation and injection environment, thereby protecting the catalyst coating membrane 10. Since the catalyst coating membrane 10 is a soft membrane, the protective portion 91 and the supporting portion 92 are provided to improve the rigidity, thereby facilitating the positioning in the injection mold 600, thereby improving the positioning accuracy in the injection mold 600.

[0096] Step S4 : demolding the package 30 , that is, removing the package structure formed in step S3 from the injection mold 600 .

[0097] In this application, the specific steps of step S2 include:

[0098] Step S21: Obtain two preset double-layer parts; wherein the edge of the preset double-layer part is flush with the edge of the packaging frame 20, or the edge of the preset double-layer part extends to the outside of the edge of the packaging frame 20; the preset double-layer part includes a protective part and a support part 921 distributed along the thickness direction of the catalyst coating membrane 10 and interconnected; the edge of the protective part is flush with the edge of the support part 921.

[0099] Step S22: cutting off the protective piece to be cut so that the preset double-layer piece forms a preset double-layer piece in an intermediate form; the protective piece includes the protective piece to be cut and the protective portion 91 which are connected to each other, and the protective piece to be cut is arranged around the protective portion 91.

[0100] Step S23: Figure 7 As shown, two preset double-layer parts of intermediate forms are respectively arranged on both sides of the catalyst coating membrane 10; wherein, the protective part 91 is fixed on the middle membrane body 12 and completely covers the surface of the middle membrane body 12, and the support part 921 completely covers the surface of the packaging frame 20 and the surface of the protective part 91.

[0101] Figure 6 and Figure 7 The first preset double-layer member 90 is a preset double-layer member in an intermediate form. The width of the protective member portion to be cut is L0.

[0102] Step S24: cutting off the support part to be cut; the support part 921 comprises a support part to be cut and a support portion 92 connected to each other, and the support part to be cut is arranged around the support portion 92. The width of the support part to be cut is L1.

[0103] Specifically, a cutting die is used to cut off the support member portion to be cut; the cutting die includes an upper cutting die and a lower cutting die.

[0104] In the present application, optionally, the protective member is a protective film, the support member 921 is a support film, and the preset double-layer member is a double-layer film; the protective film and the support film are bonded. In the intermediate structure 2, a four-layer film structure is formed, and the rigidity of the catalyst coating film 10 is improved by the multi-layer film structure, thereby improving its positioning accuracy in the injection mold 600.

[0105] Specifically, an adhesive layer is provided on the surface of the support member 921 facing the protective member.

[0106] In the present application, a positioning hole 922 is provided on the support member 921 so as to perform positioning through the positioning hole 922 during the process of cutting off the support member portion to be cut.

[0107] Specifically, a positioning pin is provided on the lower cutting die for positioning with the positioning hole 922 .

[0108] Optionally, the support member 921 includes a positioning portion 923 , and the positioning hole 922 is provided on the positioning portion 923 ; before step S3 , the positioning portion 923 needs to be cut off.

[0109] like Fig.10 As shown, the positioning portion 923 is cut off along the cutting line l1.

[0110] like Fig.10 As shown, there are multiple positioning portions 923 , and each positioning portion 923 is provided with a positioning hole 922 .

[0111] In the present application, optionally, after step S22 and before step S23, step S2 also includes: step S221: along the thickness direction of the catalyst coating membrane 10, the two transition frames are respectively located on both sides of the catalyst coating membrane 10, and the two transition frames are respectively fixed on the outer surfaces of the two packaging frames 20; the middle membrane body 12 is arranged opposite to the hollow part of the transition frame, that is, the transition frame does not contact the middle membrane body 12.

[0112] Optionally, the transition frame completely covers the outer surface of the packaging frame 20 .

[0113] Optionally, the transition frame is bonded to the packaging frame 20. That is, a bonding layer is provided on the surface of the transition frame facing the packaging frame 20.

[0114] Furthermore, in step S23, the support member 921 completely covers the surface of the transition frame and the surface of the protection portion 91, that is, the transition frame is located between the support member 921 and the packaging frame 20. In this way, when cutting off the support member portion to be cut, the cutting tool cuts on the transition frame instead of the packaging frame 20, which can prevent the cutting tool from cutting the packaging frame 20.

[0115] Optionally, the transition frame is a membrane-like structure.

[0116] Optionally, when cutting off the support member portion to be cut, the transition frame can be cut by a cutting tool, but the transition frame cannot be cut through to avoid the cutting tool causing cutting damage to the packaging frame 20.

[0117] Furthermore, after step S24 , step S2 further includes: removing the transition frame from the packaging frame 20 , that is, removing the two transition frames from the corresponding packaging frames 20 , that is, pulling the transition frame out from between the packaging frame 20 and the support portion 92 .

[0118] In the present application, optionally, in step S1 , a packaging frame 20 is bonded to both surfaces of the edge film body 11 of the catalyst coating film 10 .

[0119] In the present application, optionally, the protection part 91 is bonded to the middle film body 12. That is, in step S2, the protection part 91 is bonded to both surfaces of the middle film body 12.

[0120] Optionally, a surface of the protection portion 91 facing away from the support member 921 is provided with an adhesive layer to bond with the middle membrane body 12 .

[0121] Optionally, an adhesive layer is provided at the circumferential edge of the protection portion 91 , and no adhesive layer is provided in the middle portion of the protection portion 91 , so as to prevent the adhesive layer from damaging the middle core region of the middle membrane body 12 .

[0122] In the present application, optionally, the support portion 92 is bonded to the second frame 22. That is, in step S2, the support portion 92 is bonded to the second frame 22 and the protection portion 91.

[0123] Specifically, the support member 921 and the packaging frame 20 are bonded together.

[0124] The present invention also provides a method for processing a packaging component, which is applicable to the packaging component 100, that is, the packaging component 100 is processed by the processing method. The processing method of the packaging component includes the manufacturing method of the packaging structure. The processing method of the packaging component also includes:

[0125] Step S5 : removing the support portion 92 and the protection portion 91 from the packaging frame 20 and the catalyst coating film 10 .

[0126] That is, the support portion 92 is first removed from the packaging frame 20 and the protective portion 91, and then the protective portion 91 is removed from the catalyst coating film 10. Alternatively, when the support portion 92 and the protective portion 91 are bonded, the support portion 92 can be first removed from the packaging frame 20, and then the protective portion 91 can be removed from the catalyst coating film 10, and at the same time, the protective portion 91 is removed from the catalyst coating film 10 together with the corresponding support portion 92.

[0127] Step S6: gas diffusers 40 are provided on both sides of the catalyst coated membrane 10 along the thickness direction of the catalyst coated membrane 10; the gas diffusers 40 are fixed on the second frame 22 and / or the middle membrane body 12, and the gas diffusers 40 completely cover the middle membrane body 12. The packaging assembly 100 includes a catalyst coated membrane 10, two packaging frames 20, a packaging member 30, and two gas diffusers 40. The membrane electrode includes a catalyst coated membrane 10 and a gas diffuser 40.

[0128] Optionally, the gas diffusion member 40 is bonded to the second frame 22 and / or the middle film body 12 , so that the gas diffusion member 40 is fixed on the second frame 22 and / or the middle film body 12 .

[0129] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0130] The packaging component 100 of the present application has a simple structure; the electrode core area CCM is protected from the influence of the environment and the injection process by coating, and the flexible nature of the CCM is changed and the rigidity is increased by the protection part 91 and the support part 92 to improve the positioning accuracy.

[0131] The packaging assembly 100 cooperates with the bipolar plate to form different sealing and supporting areas, thereby improving the sealing, stability and vibration and impact resistance of the fuel cell stack.

[0132] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0133] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0134] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for manufacturing a packaging structure, characterized in that: The production method comprises: Step S1: a packaging frame (20) is fixedly arranged on both surfaces of the catalyst coating membrane (10), and the edge of the packaging frame (20) is extended to the outside of the catalyst coating membrane (10); the catalyst coating membrane (10) comprises an edge membrane body (11) and a middle membrane body (12) which are connected to each other, the edge membrane body (11) is arranged around the middle membrane body (12), and the middle membrane body (12) is arranged opposite to the hollow part of the packaging frame (20); Step S2: a protective portion (91) is fixedly provided on both surfaces of the middle membrane body (12), wherein the protective portion (91) completely covers the middle membrane body (12); and a supporting portion (92) is provided on both sides of the catalyst coating membrane (10) along the thickness direction of the catalyst coating membrane (10), wherein the supporting portion (92) is fixed on the second frame body (22) and the protective portion (91), and wherein the supporting portion (92) completely covers the second frame body (22) and the protective portion (91); the packaging frame (20) comprises a first frame body (21) and a second frame body (22) which are connected to each other, wherein the first frame body (21) is provided around the second frame body (22); Step S3: placing the intermediate structure (2) formed in step S2 in a glue injection mold (600), wherein the glue injection mold (600) clamps the support portion (92) and the fourth frame (212) of the intermediate structure (2), and the third frame (211) of the intermediate structure (2) is located in the glue injection space (610) of the glue injection mold (600); a package (30) is formed by injecting glue into the glue injection space (610), and the package (30) is clamped on the third frame (211); the first frame (21) comprises the third frame (211) and the fourth frame (212) which are connected to each other, and the third frame (211) is arranged around the fourth frame (212); Step S4: demoulding the package (30); the package structure comprises the catalyst coating film (10), two package frames (20), two protection parts (91), two support parts (92), and the package (30).

2. The method for manufacturing a packaging structure according to claim 1, characterized in that: The step S2 comprises: Step S21: obtaining two preset double-layer pieces; wherein the edge of the preset double-layer piece is flush with the edge of the packaging frame (20), or the edge of the preset double-layer piece extends to the outside of the edge of the packaging frame (20); the preset double-layer piece comprises a protective piece and a supporting piece (921) connected to each other; Step S22: cutting off the portion of the protective piece to be cut, so that the preset double-layer piece forms a preset double-layer piece of an intermediate shape; the protective piece comprises the portion of the protective piece to be cut and the protective portion (91) connected to each other, and the portion of the protective piece to be cut is arranged around the protective portion (91); Step S23: two preset double-layer members of intermediate form are respectively arranged on both sides of the catalyst coating membrane (10); wherein the protection portion (91) completely covers the surface of the middle membrane body (12), and the support member (921) completely covers the surface of the packaging frame (20) and the surface of the protection portion (91); Step S24: cutting off the support part to be cut; the support part (921) comprises the support part to be cut and the support portion (92) which are connected to each other, and the support part to be cut is arranged around the support portion (92).

3. The method for manufacturing a packaging structure according to claim 2, characterized in that: The protective member is a protective film, the supporting member (921) is a supporting film, and the preset double-layer member is a double-layer film; the protective film and the supporting film are bonded; and / or, The support member (921) is provided with a positioning hole (922) so as to perform positioning through the positioning hole (922) during the process of cutting off the support member portion to be cut.

4. The method for manufacturing a packaging structure according to claim 1, characterized in that: In the step S1, the packaging frame (20) is bonded to both surfaces of the edge film body (11) of the catalyst coating film (10); and / or, In the step S2, the protection portion (91) is bonded to both surfaces of the middle membrane (12); and / or, In the step S2, the support portion (92) is bonded to the second frame (22) and the protection portion (91).

5. The method for manufacturing a packaging structure according to claim 2, characterized in that: After step S22 and before step S23, step S2 further comprises: step S221: fixing two transition frames on the outer surfaces of the two packaging frames (20) respectively; In the step S23, the support member (921) completely covers the surface of the transition frame and the surface of the protection portion (91); After step S24, step S2 further comprises: removing the transition frame from the encapsulation frame (20).

6. A packaging structure, characterized in that: The method according to any one of claims 1 to 5 is used for production.

7. The packaging structure according to claim 6, characterized in that: The packaging component (30) comprises a first packaging part (31) and a second packaging part (32) which are connected to each other, wherein the first packaging part (31) is arranged around the second packaging part (32); the second packaging part (32) is clamped on a third frame (211); and a protruding part (311) is provided on the first packaging part (31), and the protruding part (311) is used to contact the bipolar plate.

8. The packaging structure according to claim 7, characterized in that: There are a plurality of the protruding portions (311), and the plurality of the protruding portions (311) are distributed along a distribution direction of the first packaging portion (31) and the second packaging portion (32); and / or, The protruding portion (311) comprises a first protruding portion (312) and a second protruding portion (313), and the protruding directions of the first protruding portion (312) and the second protruding portion (313) are opposite; and / or, The protrusions (311) are arranged to extend along the circumference of the catalyst coating membrane (10) and are connected end to end; and / or, The packaging member (30) is arranged to extend along the circumference of the catalyst coating membrane (10) and is connected end to end.

9. The packaging structure according to claim 6, characterized in that: The packaging frame (20) is an integrated structure.

10. A method for processing a packaging component, characterized in that: include: The method for manufacturing the packaging structure according to any one of claims 1 to 5; Step S5: removing the support portion (92) and the protection portion (91) from the packaging frame (20) and the catalyst coating film (10); Step S6: gas diffusion members (40) are arranged on both sides of the catalyst coating membrane (10) along the thickness direction of the catalyst coating membrane (10); the gas diffusion member (40) is fixed on the second frame (22) and / or the middle membrane body (12), and the gas diffusion member (40) completely covers the middle membrane body (12); the packaging assembly comprises the catalyst coating membrane (10), two packaging frames (20), the packaging member (30), and two gas diffusion members (40); the packaging assembly is used to be arranged between the bipolar plates of a fuel cell stack.

11. A packaging component, characterized in that: The processing is carried out using the processing method described in claim 10.

12. The packaging assembly according to claim 11, characterized in that: The packaging component (30) comprises a first packaging part (31) and a second packaging part (32) which are connected to each other, wherein the first packaging part (31) is arranged around the second packaging part (32); the second packaging part (32) is clamped on a third frame (211); and a protruding part (311) is provided on the first packaging part (31), and the protruding part (311) is used to contact the bipolar plate.

13. The packaging assembly according to claim 12, characterized in that: There are a plurality of the protruding portions (311), and the plurality of the protruding portions (311) are distributed along a distribution direction of the first packaging portion (31) and the second packaging portion (32); and / or, The protruding portion (311) comprises a first protruding portion (312) and a second protruding portion (313), and the protruding directions of the first protruding portion (312) and the second protruding portion (313) are opposite; and / or, The protrusions (311) are arranged to extend along the circumference of the catalyst coating membrane (10) and are connected end to end; and / or, The packaging member (30) is arranged to extend along the circumference of the catalyst coating membrane (10) and is connected end to end.

14. The packaging assembly according to claim 11, characterized in that: The packaging frame (20) is an integrated structure.

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