Device and method for continuously preparing battery CCM through roll-to-roll spraying

Abstract

The invention provides a device and a method for continuously preparing a battery CCM through roll-to-roll spraying, and relates to the technical field of membrane electrodes. The device comprises a cathode production device and an anode production device, wherein the cathode production device comprises a cathode proton exchange membrane unwinding device, a cathode spraying device and a cathode proton exchange membrane winding device; the anode production device comprises an anode proton exchange membrane unwinding device, an anode spraying device and an anode proton exchange membrane winding device; the anode spraying device comprises a vacuum adsorption heating roller and an anode spraying unit, and the proton exchange membrane abuts against and is adsorbed to the vacuum adsorption heating roller through guide rollers on the two sides of the vacuum adsorption heating roller. The method comprises the steps that cathode spraying treatment is conducted firstly, then anode spraying treatment is conducted, and during anode spraying treatment, the proton exchange membrane is adsorbed to a vacuum heating roller through a guide roller so that the proton exchange membrane can be sprayed in a spreading state. In the process of preparing the fuel cell CCM, the cathode and the anode are both subjected to roll-to-roll continuous spraying, so that the production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of membrane electrode technology, and in particular to a device and method for continuously preparing battery CCM by roll-to-roll spraying. Background Art

[0002] The CCM (Catalyst Coated Membrane) method, also known as the catalyst coated membrane method, is a method of directly coating the catalyst on both sides of the proton exchange membrane to form a catalytic layer. At present, the common preparation processes of the CCM method are spraying and coating. Compared with the spraying process, the coating process is more suitable for mass production. The coating process is divided into direct coating and indirect coating. The direct coating process is to directly coat the prepared catalyst slurry on the proton exchange membrane, while the indirect coating is to coat, print or spray the pre-prepared catalyst slurry on a certain transfer medium, and then transfer the catalyst layer to the proton exchange membrane after drying to obtain a catalyst-covered proton exchange membrane. Since the solvent has been removed before transfer, although the indirect coating will not swell, the catalyst on the edge of the proton exchange membrane and the transfer medium cannot be completely transferred to the membrane due to uneven force during the transfer process during hot pressing, thereby reducing the transfer rate of the catalyst.

[0003] In the process of preparing membrane electrodes by traditional spraying, it is basically single-piece spraying, with a small amount of roll-to-roll spraying, but all of them are cathode spraying, and the anode is still sheet spraying. In addition, during the spraying process, the loading and unloading of the equipment are all manual operations. This spraying method has low process capacity and high cost. Summary of the invention

[0004] In order to improve the problems of low process capacity and high cost in the preparation of membrane electrodes by single-piece spraying, the present application provides an apparatus and method for continuous preparation of battery CCM by roll-to-roll spraying.

[0005] In the first aspect, the present application provides a device for continuously preparing battery CCM by roll-to-roll spraying, which adopts the following technical solution: A device for preparing battery CCM by roll-to-roll spraying continuously, comprising a cathode roll-to-roll spraying continuous production device and an anode roll-to-roll spraying continuous production device, The cathode roll-to-roll spraying continuous production device comprises: A cathode proton exchange membrane unwinding device is used to unwind a proton exchange membrane having a proton exchange membrane protective layer on one side; A cathode spraying device, used for spraying a cathode catalyst on a surface of the proton exchange membrane that is away from the proton exchange membrane protective layer, to obtain a proton exchange membrane that has been cathode sprayed; A cathode proton exchange membrane winding device is used to wind up the cathode sprayed proton exchange membrane; The anode roll-to-roll spraying continuous production device comprises: Anode proton exchange membrane unwinding device, used to unwind the cathode sprayed proton exchange membrane; An anode spraying device is used to spray an anode catalyst on the surface of the proton exchange membrane on the side where the proton exchange membrane protective layer is removed after the cathode spraying, so as to obtain a proton exchange membrane with double-sided spraying; Anode proton exchange membrane winding device, used to wind up the proton exchange membrane that has been sprayed on both sides; The anode spraying device comprises a vacuum adsorption heating roller and an anode spraying unit located above the vacuum adsorption heating roller, and the proton exchange membrane after cathode spraying is abutted against and adsorbed onto the vacuum adsorption heating roller through guide rollers on both sides of the vacuum adsorption heating roller.

[0006] Optionally, the cathode roll-to-roll spraying continuous production device further includes: A cathode auxiliary frame unwinding device, used for unwinding an auxiliary frame material, wherein the auxiliary frame material comprises a base film having an adhesive layer and adhesive surface protective films located on both sides of the base film; A cathode auxiliary frame half-cutting device is used to cut the unrolled auxiliary frame material to cut it into an auxiliary frame with a hollowed-out middle area; The cathode first rubber surface protective film winding device is used to remove the rubber surface protective film on one side of the auxiliary frame and to make the auxiliary frame with the rubber surface protective film on one side removed fit with the proton exchange membrane from the cathode proton exchange membrane unwinding device to obtain the proton exchange membrane to be coated with the cathode catalyst.

[0007] Optionally, the anode roll-to-roll spraying continuous production device further comprises: The proton exchange membrane protective layer winding device is used to remove the proton exchange membrane protective layer of the proton exchange membrane that has been sprayed on the cathode from the anode proton exchange membrane unwinding device.

[0008] Optionally, the anode roll-to-roll spraying continuous production device further comprises: An anode auxiliary frame unwinding device is used to unwind the auxiliary frame material, wherein the auxiliary frame material includes a base film with an adhesive layer and adhesive surface protective films located on both sides of the base film; Anode auxiliary frame half-cutting device, used for cutting the unrolled auxiliary frame material to cut it into auxiliary frames with hollowed-out middle areas; The anode first rubber surface protective film winding device is used to remove the rubber surface protective film on one side of the auxiliary frame and to laminate the auxiliary frame with the rubber surface protective film on one side removed with the cathode sprayed proton exchange membrane from the anode proton exchange membrane unwinding device to obtain a proton exchange membrane to be coated with an anode catalyst; The vacuum adsorption roller is arranged between the anode proton exchange membrane unwinding device and the anode spraying device, and is used to bond the auxiliary frame with one side of the rubber surface protective film removed to the proton exchange membrane with the proton exchange membrane protective layer removed to obtain the proton exchange membrane to be coated with the anode catalyst.

[0009] Optionally, the cathode spraying device includes a vacuum adsorption heating platform, a cathode spraying unit located above the vacuum adsorption heating platform, and a vacuum adsorption heating platform lifting device located at the bottom of the vacuum adsorption heating platform.

[0010] Optionally, the cathode roll-to-roll spraying continuous production device further includes: The cathode second rubber surface protective film winding device is arranged between the cathode spraying device and the cathode proton exchange membrane winding device, and is used to roll up and remove the rubber surface protective film on the other side of the auxiliary frame on the proton exchange membrane that has completed cathode spraying.

[0011] Optionally, the anode roll-to-roll spraying continuous production device further comprises: The anode second rubber surface protective film winding device is arranged between the anode spraying device and the anode proton exchange membrane winding device, and is used to roll up and remove the rubber surface protective film on the other side of the auxiliary frame on the proton exchange membrane that has completed double-sided spraying, so as to obtain a proton exchange membrane with the rubber surface protective film removed on both sides.

[0012] Optionally, the anode roll-to-roll spraying continuous production device further comprises: The CCM cathode protection film unwinding device is arranged between the anode second adhesive surface protection film winding device and the anode proton exchange membrane winding device, and is used to bond the cathode surface of the proton exchange membrane with the adhesive surface protection films removed from both sides.

[0013] Optionally, the cathode auxiliary frame half-cutting device and the anode auxiliary frame half-cutting device use the same cutting die, and the cutting die is a three-layer structure including an outer layer die, a middle layer die and an inner layer die, the outer layer die is used to cut the rubber surface protective film on one side of the auxiliary frame material, the middle layer die is used to cut the rubber surface protective film and the rubber surface layer on one side of the auxiliary frame material, and the inner layer die is used to cut the rubber surface layer and the rubber surface protective films on both sides of the auxiliary frame material; and the cutting area of ​​the outer layer die is larger than the cutting area of ​​the middle layer die, and the cutting area of ​​the inner layer die is larger than the cutting area of ​​the inner layer die.

[0014] In the second aspect, the present application provides a device method for continuously preparing battery CCM by roll-to-roll spraying, which adopts the following technical solution: A method for continuously preparing battery CCM by roll-to-roll spraying comprises the following steps: Step S1: After unwinding the proton exchange membrane, die-cutting it on the cathode surface into an auxiliary frame of a predetermined size, then performing cathode spraying, and then rewinding it to obtain a proton exchange membrane that has completed cathode spraying; Step S2: After the cathode-sprayed proton exchange membrane is unwound, an auxiliary frame cut into a predetermined size is attached to the anode surface thereof, and then the anode is sprayed, and then the membrane is rewound to obtain a double-sided sprayed proton exchange membrane; Wherein, when the anode spraying treatment is performed in step S2, the proton exchange membrane that has completed cathode spraying is adsorbed onto the vacuum adsorption heating roller through a guide roller so that it is sprayed in a spread state.

[0015] In summary, the present application includes at least one of the following beneficial effects: 1. The present invention provides a device for preparing fuel cell CCM by roll-to-roll continuous spraying. After roll-to-roll continuous spraying is adopted for cathode spraying, roll-to-roll continuous spraying is also adopted for anode spraying. Moreover, automation can be realized in the loading and unloading process without manual operation, thereby greatly improving production efficiency and reducing labor costs.

[0016] 2. During anode spraying in the present application, although the proton exchange membrane lacks the support of the proton exchange membrane protective layer, the curved surface support provided by the vacuum adsorption heating roller enables the proton exchange membrane to be sprayed in a spread state, thus avoiding the problem of easy wrinkling of the proton exchange membrane.

[0017] 3. The present application adopts a half-cut process auxiliary frame in the process of preparing the fuel cell CCM, which not only plays a role in supporting the proton exchange membrane, but also can effectively control the spraying area. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a connection diagram of a cathode roll-to-roll spraying continuous production device of a device for continuously preparing battery CCM by roll-to-roll spraying in an embodiment of the present application; Figure 2 It is a connection schematic diagram of an anode roll-to-roll spraying continuous production device of a device for continuously preparing battery CCM by roll-to-roll spraying in an embodiment of the present application; Figure 3 is a schematic top view of a cutting die used in an embodiment of the present application; Figure 4 This application Figure 3 Schematic diagram of cutting with the cutting die shown.

[0019] In the figure: 100, cathode roll-to-roll continuous spraying production device; 200, anode roll-to-roll continuous spraying production device; 1, cathode proton exchange membrane unwinding device; 2, cathode auxiliary frame unwinding device; 3, cathode auxiliary frame half-cutting device; 4, cathode spraying unit; 5, vacuum adsorption heating platform; 6, vacuum adsorption heating platform lifting device; 7, cathode first adhesive surface protective film winding device; 8, cathode second adhesive surface protective film winding device; 9, cathode proton exchange membrane winding device; 10, anode proton exchange membrane unwinding device; 11, proton exchange membrane protective layer winding device; 12, anode auxiliary frame unwinding device; 13, anode auxiliary frame half-cutting device; 14, anode first adhesive surface protective film winding device; 15, vacuum adsorption roller; 16, vacuum adsorption heating roller; 17, anode spraying unit; 18, anode The winding device of the second adhesive surface protective film of the pole; 19, the unwinding device of the CCM cathode protective film; 20, the winding device of the anode proton exchange membrane; 21, the cathode spraying device; 22, the anode spraying device; 101, the proton exchange membrane protective layer; 102, the proton exchange membrane; 103, the auxiliary frame material; 104, the auxiliary frame; 106, the auxiliary frame for removing the adhesive surface protective film on one side; 107, the proton exchange membrane to be coated with the cathode catalyst; 109, the proton exchange membrane after the cathode spraying; 203, the proton exchange membrane to be coated with the anode catalyst; 204, the proton exchange membrane after double-sided spraying; 206, the proton exchange membrane with the adhesive surface protective film removed from both sides; 104a, the adhesive surface protective film; 104b, the base membrane; 104c, the adhesive surface protective film; 301, the outer layer knife die; 302, the middle layer knife die; 303, the inner layer knife die. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The first embodiment of the present invention provides a device for continuously preparing battery CCM by roll-to-roll spraying, which generally may include a cathode roll-to-roll spraying continuous production device and an anode roll-to-roll spraying continuous production device.

[0022] Figure 1 Schematic diagram of the connection of the cathode roll-to-roll continuous spraying production device of the roll-to-roll continuous spraying production device for preparing battery CCM in the embodiment of the present application. Figure 1The cathode roll-to-roll spraying continuous production device 100 includes a cathode proton exchange membrane unwinding device 1, a cathode auxiliary frame unwinding device 2, a cathode auxiliary frame half-cutting device 3, a cathode first rubber surface protection film winding device 7, a cathode spraying device 21, a cathode second rubber surface protection film winding device 8 and a cathode proton exchange membrane winding device 9.

[0023] See also Figure 1 The cathode proton exchange membrane unwinding device 1 is used to unwind the proton exchange membrane 102 to be coated, and one side of the proton exchange membrane 102 has a proton exchange membrane protective layer 101, and the side of the proton exchange membrane 102 facing the cathode proton exchange membrane unwinding device 1 is the side with the proton exchange membrane protective layer 101, so after the proton exchange membrane 102 is unwound, the auxiliary frame 106 with the adhesive protective film on one side removed can be attached to the side away from the proton exchange membrane protective layer 101.

[0024] See also Figure 1 The cathode auxiliary frame unwinding device 2 is used to unwind the auxiliary frame material 103. The auxiliary frame material 103 is a three-layer structure consisting of a base film with an adhesive layer and an adhesive surface protective film located on both sides of the base film. The thickness of the base film with the adhesive layer is generally 25-200μm, the thickness of the adhesive surface protective film on both sides is equal, and the thickness of the single-layer adhesive surface protective film is generally 100-200μm. The cathode auxiliary frame half-cutting device 3 is used to cut the unrolled auxiliary frame material 103 to cut it into an auxiliary frame 104 with a hollow middle area.

[0025] The base film of the auxiliary frame material 103 is made of PEN, PET or PI with an adhesive layer. The adhesive layer is made of pressure-sensitive adhesive, specifically silicone or 3M glue.

[0026] Figure 3 Schematic diagram of the top view of the cutting die used in the embodiment of the present application. Figure 3 The cutting die used by the cathode auxiliary frame half-cutting cutting device 3 is a three-layer structure including an outer layer die 301, a middle layer die 302 and an inner layer die 303. The height of the inner layer die 303 is longer than the height of the middle layer die 302, and the height of the middle layer die 302 is longer than the outer layer die 301. The height difference between the middle layer die 302 and the outer layer die 301 is equal to the thickness of the base film with the glue layer of the auxiliary frame material 103, and the height difference between the inner layer die 303 and the middle layer die 302 is equal to the thickness of the glue surface protective film on one side of the auxiliary frame material.

[0027] Therefore, when the cathode auxiliary frame half-cutting cutting device 3 is cutting, the outer layer cutting die 301 is used to cut the adhesive surface protective film on one side of the auxiliary frame material 103, the middle layer cutting die 302 is used to cut the adhesive surface protective film on one side and the adhesive surface layer of the auxiliary frame material 103, and the inner layer cutting die 303 is used to cut the adhesive surface layer and the adhesive surface protective films on both sides of the auxiliary frame material 103. In addition, the cutting area of ​​the outer layer cutting die 301 is larger than the cutting area of ​​the middle layer cutting die 302, and the cutting area of ​​the inner layer cutting die 303 is larger than the cutting area of ​​the inner layer cutting die 303, thereby obtaining the following Figure 4 Auxiliary frame 104 is shown. Figure 4 This application Figure 3 Cutting diagram of the cutting die shown. Figure 4 The auxiliary frame 104 has a glue surface protective film 104a, a base film 104b with a glue layer, and a glue surface protective film 104c. The area of ​​the glue surface protective film 104a is larger than the area of ​​the base film 104b with a glue layer, the area of ​​the base film 104b with a glue layer is larger than the area of ​​the glue surface protective film 104c, the difference in single-side width between the base film 104b with a glue layer and the glue surface protective film 104a in the horizontal direction is 2-5mm, and the difference in single-side width between the glue surface protective film 104c and the base film 104b with a glue layer in the horizontal direction is 2-30mm.

[0028] The cathode first adhesive surface protective film winding device 7 is used to remove the adhesive surface protective film 104a on one side of the auxiliary frame 104 and to make the auxiliary frame 106 with the adhesive surface protective film on one side removed fit with the proton exchange membrane 102 from the cathode proton exchange membrane unwinding device 1 to obtain the proton exchange membrane 107 to be coated with the cathode catalyst. At this time, the proton exchange membrane 107 to be coated with the cathode catalyst includes, from bottom to top, a proton exchange membrane protective layer 101, a proton exchange membrane 102, a base membrane 104b with an adhesive layer and an adhesive surface protective film 104c, and the area of ​​the adhesive surface protective film 104c is equal to the effective area of ​​CCM spraying.

[0029] The cathode spraying device 21 is used for allowing the proton exchange membrane 107 to be coated with cathode catalyst to pass through, and for spraying cathode catalyst on the upper surface thereof to obtain the proton exchange membrane 109 after cathode spraying.

[0030] See also Figure 1 The cathode spraying device 21 includes a vacuum adsorption heating platform 5, a cathode spraying unit 4 located above the vacuum adsorption heating platform 5, and a vacuum adsorption heating platform lifting device 6 located at the bottom of the vacuum adsorption heating platform 5. The function of the vacuum adsorption heating platform lifting device 6 is to make the proton exchange membrane 107 to be coated with the cathode catalyst completely flatly adsorbed on the vacuum adsorption heating platform 5.

[0031] The proton exchange membrane 107 to be coated with the cathode catalyst enters the cathode spraying device 21 under the action of the guide roller, and the area in the middle of the proton exchange membrane 107 to be coated with the cathode catalyst that is not covered by the auxiliary frame 104 stays on the vacuum adsorption heating platform 5, and the vacuum adsorption heating platform lifting device 6 is raised and the vacuum adsorption is turned on, so that the proton exchange membrane 107 to be coated with the cathode catalyst can be flatly adsorbed on the vacuum adsorption heating platform 5, and then the cathode spraying unit 4 is used to perform cathode spraying. The cathode spraying unit 4 sprays downward from the top of the proton exchange membrane 107 to be coated with the cathode catalyst, and a single nozzle or multiple nozzles can be used to spray according to the required load.

[0032] The cathode second adhesive surface protective film winding device 8 is arranged between the cathode spraying device 21 and the cathode proton exchange membrane winding device 9, and is used to roll up and remove the adhesive surface protective film 104c on the other side of the auxiliary frame 104 on the proton exchange membrane 109 that has completed cathode spraying, and then roll it up again through the cathode proton exchange membrane winding device 9. So far, the cathode sprayed proton exchange membrane 109 rolled up by the cathode proton exchange membrane winding device 9 includes, from bottom to top, a proton exchange membrane protective layer 101, a proton exchange membrane 102, and a base membrane 104b with an adhesive layer. The base membrane 104b with an adhesive layer is still retained on the proton exchange membrane 102, which can provide a certain support effect. At the same time, a cathode catalyst layer is also formed on the side of the proton exchange membrane 102 close to the base membrane 104b with an adhesive layer.

[0033] Figure 2 Schematic diagram of the connection of the anode roll-to-roll spraying continuous production device of the roll-to-roll spraying continuous production device of the battery CCM of the embodiment of the present application. Figure 2 The anode roll-to-roll spraying continuous production device 200 includes: an anode proton exchange membrane unwinding device 10, a proton exchange membrane protective layer winding device 11, a vacuum adsorption roller 15, an anode auxiliary frame unwinding device 12, an anode auxiliary frame half-cutting device 13, an anode first rubber surface protective film winding device 14, an anode spraying device 22, an anode second rubber surface protective film winding device 18, a CCM cathode protection membrane unwinding device 19 and an anode proton exchange membrane winding device 20.

[0034] The anode proton exchange membrane unwinding device 10 is used to unwind the cathode-sprayed proton exchange membrane 109 wound up by the cathode proton exchange membrane winding device 9. Figure 2 The anode proton exchange membrane unwinding device 10 unwinds the cathode sprayed proton exchange membrane 109 and then removes the proton exchange membrane protective layer 101 located on the back of the cathode through the proton exchange membrane protective layer winding device 11.

[0035] The anode auxiliary frame unwinding device 12 is used to unwind the auxiliary frame material 103. The auxiliary frame material 103 is exactly the same as the auxiliary frame material 103 used in the cathode roll-to-roll spraying continuous production device 100, so it is not repeated here. The anode auxiliary frame half-cutting cutting device 13 is used to cut the unrolled auxiliary frame material 103 to cut it into an auxiliary frame 104 with a hollow middle area. The anode auxiliary frame half-cutting cutting device 13 uses a cutting die that is exactly the same as the cathode auxiliary frame half-cutting cutting device 3, so it is not repeated here.

[0036] The anode first adhesive surface protective film winding device 14 is used to remove the adhesive surface protective film 104a on one side of the auxiliary frame 104 and make the auxiliary frame 106 with the adhesive surface protective film on one side removed and the proton exchange membrane 102 with the proton exchange membrane protective layer 101 removed from the anode proton exchange membrane unwinding device 10 be bonded on the surface of the vacuum adsorption roller 15, and the cathode catalyst layer overlaps with the adhesive surface protective film 104c of the auxiliary frame 106 with the adhesive surface protective film on one side removed, thereby obtaining the proton exchange membrane 203 to be coated with the anode catalyst. At this time, the proton exchange membrane 203 to be coated with the anode catalyst includes, from bottom to top, the cathode catalyst layer (surrounded by the base membrane 104b with the adhesive layer retained in the anode roll-to-roll spraying continuous production device 200), the proton exchange membrane 102, the base membrane 104b with the adhesive layer and the adhesive surface protective film 104c, and the adhesive surface protective film 104c overlaps with the effective area of ​​the cathode catalyst layer on the back of the proton exchange membrane 102.

[0037] The anode spraying device 22 is used to spray the anode catalyst on the surface of the proton exchange membrane 203 to be coated with the anode catalyst on the side facing away from the cathode catalyst layer, so as to obtain the proton exchange membrane 204 with double-sided spraying.

[0038] The anode spraying device 22 includes a vacuum adsorption heating roller 16 and an anode spraying unit 17 located above the anode spraying unit 17. The proton exchange membrane 203 to be coated with the anode catalyst is abutted against and adsorbed onto the vacuum adsorption heating roller 16 through the guide rollers on both sides of the vacuum adsorption heating roller 16, so that the proton exchange membrane 203 to be coated with the anode catalyst can be sprayed in a spread state, thereby obtaining a double-sided sprayed proton exchange membrane 204. Although the proton exchange membrane 102 lacks the support of the proton exchange membrane protective layer during anode spraying, the curved surface support provided by the vacuum adsorption heating roller 16 avoids the problem of the proton exchange membrane being easily wrinkled.

[0039] The cathode spraying unit 4 and the anode spraying unit 17 are specifically ultrasonic spraying, thereby preventing the proton exchange membrane from swelling and making the platinum-carbon catalyst nanoparticles highly dispersed and reducing agglomeration.

[0040] During operation, the vacuum adsorption roller 15 and the vacuum adsorption heating roller 16 rotate synchronously. When the proton exchange membrane 203 to be coated with the anode catalyst enters the anode spraying device 22 under the action of the vacuum adsorption roller 15, and the spraying area is located below the anode spraying unit 17, the vacuum adsorption heating roller 16 is kept not to rotate, and the anode spraying unit 17 moves along the axis direction of the vacuum adsorption heating roller 16, and sprays reciprocatingly. The number of spraying times depends on the platinum loading of the membrane electrode anode, generally 1-4 times. When the spraying is completed, the anode spraying unit 17 stops moving, and the vacuum adsorption heating roller 16 starts to rotate. The moving distance depends on the spraying spacing of the anode spraying unit 17, generally rotating 3-6mm. After the vacuum adsorption heating roller 16 stops rotating, the next round of spraying begins. The heating temperature of the vacuum adsorption heating roller is set to 75-90℃.

[0041] The anode second adhesive surface protective film winding device 18 is arranged between the anode spraying device 22 and the anode proton exchange membrane winding device 20, and is used to roll up and remove the adhesive surface protective film 104c on the other side of the auxiliary frame 104 on the proton exchange membrane 204 that has completed double-sided spraying, so as to obtain a proton exchange membrane 206 with the adhesive surface protective film removed on both sides. Afterwards, the proton exchange membrane 206 with the adhesive surface protective film removed on both sides is then covered with a cathode protective film on one side of its cathode catalyst layer by the CCM cathode protective membrane unwinding device 19, and finally rolled up by the anode proton exchange membrane winding device 20. At this point, the products rolled up by the anode proton exchange membrane winding device 20 include, from bottom to top, a cathode protective membrane, a cathode catalyst layer (surrounded by a base membrane 104b), a proton exchange membrane 102, and an anode catalyst layer (surrounded by a base membrane 104b).

[0042] The second embodiment of the present invention also provides a method for continuously preparing a battery CCM by roll-to-roll spraying, comprising the following steps: Step S1: Take a proton exchange membrane 102 having a proton exchange membrane protective layer 101, and use the side of the proton exchange membrane 102 facing away from the proton exchange membrane protective layer 101 as the cathode side, and use the side of the proton exchange membrane protective layer 101 as the anode side; unwind the proton exchange membrane 102, and die-cut it into an auxiliary frame 104 of a predetermined size on its cathode side, retain the rubber surface protective film of the auxiliary frame 104 facing the cathode side, and then perform cathode spraying treatment on a vacuum adsorption heating platform 5, and after the cathode spraying treatment is completed, remove the rubber surface protective film of the auxiliary frame 104 facing the cathode side, and roll up to obtain a proton exchange membrane 109 that has completed cathode spraying; Step S2: After the cathode-sprayed proton exchange membrane 109 is unwound, the proton exchange membrane protective layer 101 is removed, and then the auxiliary frame 104 cut into a predetermined size is attached to the anode surface, and the rubber surface protective film of the auxiliary frame 104 facing the anode surface is retained. Thereafter, the anode is sprayed on the vacuum adsorption heating roller 16 in a spread state, and after the anode spraying is completed, the rubber surface protective film facing the anode surface is removed, and the cathode surface is covered with a cathode protective film. Finally, the proton exchange membrane 204 with double-sided spraying is rolled up, which includes, from bottom to top, a cathode protective membrane, a cathode catalyst layer (surrounded by a base membrane 104b), a proton exchange membrane 102, and an anode catalyst layer (surrounded by a base membrane 104b).

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for continuous roll-to-roll spraying of battery CCM, characterized in that: It comprises a cathode roll-to-roll continuous spraying production device (100) and an anode roll-to-roll continuous spraying production device (200), The cathode roll-to-roll spraying continuous production device (100) comprises: A cathode proton exchange membrane unwinding device (1) is used to unwind a proton exchange membrane (102) having a proton exchange membrane protective layer (101) on one side; A cathode spraying device (21) is used to spray a cathode catalyst onto a surface of the proton exchange membrane (102) that is away from the proton exchange membrane protective layer (101), thereby obtaining a cathode-sprayed proton exchange membrane (109); A cathode proton exchange membrane winding device (9) is used to wind up the cathode sprayed proton exchange membrane (109); The anode roll-to-roll spraying continuous production device (200) comprises: An anode proton exchange membrane unwinding device (10) is used to unwind the cathode sprayed proton exchange membrane (109); An anode spraying device (22) is used to spray an anode catalyst on the surface of a proton exchange membrane (109) that has been subjected to cathode spraying, on the side where the proton exchange membrane protective layer (101) has been removed, to obtain a proton exchange membrane (204) that has been subjected to double-side spraying; An anode proton exchange membrane winding device (20) is used to wind up the proton exchange membrane (204) that has been sprayed on both sides; The anode spraying device (22) comprises a vacuum adsorption heating roller (16) and an anode spraying unit (17) located above the vacuum adsorption heating roller, and the proton exchange membrane (109) that has completed cathode spraying is abutted against and adsorbed onto the vacuum adsorption heating roller (16) through guide rollers on both sides of the vacuum adsorption heating roller (16).

2. The device for continuous roll-to-roll spraying of battery CCM according to claim 1 is characterized in that: The cathode roll-to-roll spraying continuous production device (100) further comprises: A cathode auxiliary frame unwinding device (2) for unwinding an auxiliary frame material (103), wherein the auxiliary frame material (103) comprises a base film having an adhesive layer and adhesive surface protective films located on both sides of the base film; A cathode auxiliary frame half-cutting device (3) for cutting the unrolled auxiliary frame material (103) to cut it into an auxiliary frame (104) with a hollowed-out middle area; The cathode first adhesive surface protective film winding device (7) is used to remove the adhesive surface protective film (104a) on one side of the auxiliary frame (104) and to laminate the auxiliary frame (106) with the adhesive surface protective film on one side removed with the proton exchange membrane (102) from the cathode proton exchange membrane unwinding device (1) to obtain the proton exchange membrane (107) to be coated with the cathode catalyst.

3. The device for continuous roll-to-roll spraying of battery CCM according to claim 2 is characterized in that: The anode roll-to-roll spraying continuous production device (200) further comprises: The proton exchange membrane protective layer winding device (11) is used to remove the proton exchange membrane protective layer (101) of the cathode sprayed proton exchange membrane (109) from the anode proton exchange membrane unwinding device (10).

4. The device for continuous roll-to-roll spraying of battery CCM according to claim 3 is characterized in that: The anode roll-to-roll spraying continuous production device (200) further comprises: An anode auxiliary frame unwinding device (12) is used to unwind an auxiliary frame material (103), wherein the auxiliary frame material (103) comprises a base film having an adhesive layer and adhesive surface protective films located on both sides of the base film; An anode auxiliary frame half-cutting device (13) is used to cut the unrolled auxiliary frame material (103) to cut it into an auxiliary frame (104) with a hollowed-out middle area; The anode first rubber surface protective film winding device (14) is used to remove the rubber surface protective film (104a) on one side of the auxiliary frame (104) and to laminate the auxiliary frame (106) with the rubber surface protective film on one side removed with the cathode sprayed proton exchange membrane (109) from the anode proton exchange membrane unwinding device (10) to obtain a proton exchange membrane (203) to be coated with an anode catalyst; The vacuum adsorption roller (15) is arranged between the anode proton exchange membrane unwinding device (10) and the anode spraying device (22) and is used to bond the auxiliary frame (106) with the adhesive surface protective film on one side removed to the proton exchange membrane with the proton exchange membrane protective layer (101) removed to obtain the proton exchange membrane (203) to be coated with the anode catalyst.

5. The device for continuous roll-to-roll spraying of battery CCM according to claim 1 is characterized in that: The cathode spraying device (21) comprises a vacuum adsorption heating platform (5), a cathode spraying unit (4) located above the vacuum adsorption heating platform (5), and a vacuum adsorption heating platform lifting device (6) located at the bottom of the vacuum adsorption heating platform (5).

6. The device for continuous roll-to-roll spraying of battery CCM according to claim 1 is characterized in that: The cathode roll-to-roll spraying continuous production device (100) further comprises: The cathode second rubber surface protective film winding device (8) is arranged between the cathode spraying device (21) and the cathode proton exchange membrane winding device (9) and is used to wind up and remove the rubber surface protective film (104c) on the other side of the auxiliary frame (104) on the cathode sprayed proton exchange membrane (109).

7. The device for continuous roll-to-roll spraying of battery CCM according to claim 1 is characterized in that: The anode roll-to-roll spraying continuous production device (200) further comprises: The anode second adhesive surface protective film winding device (18) is arranged between the anode spraying device (22) and the anode proton exchange membrane winding device (20) and is used to wind up and remove the adhesive surface protective film (104c) on the other side of the auxiliary frame (104) on the proton exchange membrane (204) that has been sprayed on both sides, so as to obtain a proton exchange membrane (206) with the adhesive surface protective films removed on both sides.

8. The device for continuous roll-to-roll spraying of battery CCM according to claim 7 is characterized in that: The anode roll-to-roll spraying continuous production device (200) further comprises: The CCM cathode protection film unwinding device (19) is arranged between the anode second adhesive surface protection film winding device (18) and the anode proton exchange membrane winding device (20) and is used to bond the cathode surface of the proton exchange membrane (206) with the adhesive surface protection films removed from both sides.

9. The device for continuous roll-to-roll spraying of battery CCM according to claim 4 is characterized in that: The cathode auxiliary frame half-cutting cutting device (3) and the anode auxiliary frame half-cutting cutting device (13) use the same cutting die. The cutting die is a three-layer structure comprising an outer layer die (301), a middle layer die (302) and an inner layer die (303). The outer layer die (301) is used to cut the adhesive surface protective film on one side of the auxiliary frame material (103), the middle layer die (302) is used to cut the adhesive surface protective film and adhesive surface layer on one side of the auxiliary frame material (103), and the inner layer die (303) is used to cut the adhesive surface layer and adhesive surface protective films on both sides of the auxiliary frame material (103); and the cutting area of ​​the outer layer die (301) is larger than that of the middle layer die (302), which is larger than that of the inner layer die (303).

10. A method for preparing battery CCM by continuous roll-to-roll spraying, characterized in that: The steps include: Step S1: After unwinding the proton exchange membrane (102), die-cutting the cathode surface of the proton exchange membrane (102) into an auxiliary frame (104) of a predetermined size, then performing cathode spraying, and then rewinding the proton exchange membrane (109) after cathode spraying; Step S2: unwinding the cathode-sprayed proton exchange membrane (109), attaching it to the anode surface of the membrane and cutting it into an auxiliary frame (104) of a predetermined size, and then performing anode spraying, and then rewinding the membrane to obtain a double-sided sprayed proton exchange membrane (204); In the step S2, when the anode spraying treatment is performed, the proton exchange membrane (109) that has completed the cathode spraying is adsorbed onto the vacuum adsorption heating roller (16) through a guide roller so that it is sprayed in a spread state.

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