CN209981371U - Adsorption coating equipment for hydrogen fuel cell CCM membrane electrode - Google Patents
Adsorption coating equipment for hydrogen fuel cell CCM membrane electrode Download PDFInfo
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- CN209981371U CN209981371U CN201921092705.5U CN201921092705U CN209981371U CN 209981371 U CN209981371 U CN 209981371U CN 201921092705 U CN201921092705 U CN 201921092705U CN 209981371 U CN209981371 U CN 209981371U
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Abstract
An adsorption coating device of a hydrogen fuel cell CCM membrane electrode comprises an unreeling mechanism used for releasing a proton exchange membrane; the first coating head is used for coating a first catalytic layer on the surface A of the proton exchange membrane; the first baking oven is used for baking the first catalytic layer at a first preset temperature; the protective film winding mechanism is used for collecting the protective film stripped from the surface B of the proton exchange membrane; an adsorption device for adsorbing the A surface of the proton exchange membrane to be coated with the second catalyst layer; the second coating head is used for coating a second catalyst layer on the surface B of the proton exchange membrane; the second baking oven is used for baking the second catalytic layer at a second preset temperature under the condition that the adsorption device keeps an adsorption state; after the second baking oven is baked, the adsorption device releases the adsorption on the proton exchange membrane; and the winding mechanism is used for winding the CCM membrane electrode. The utility model has the advantages of coating the A and B surfaces of the proton exchange membrane without a transfer printing film.
Description
Technical Field
The utility model relates to an adsorption coating method and equipment for a hydrogen fuel cell CCM (catalyst coated membrane) membrane electrode.
Background
When the catalyst layers are coated on the two sides of the proton exchange membrane of the hydrogen fuel cell, most of the solvents used for the catalyst layers are alcohol substances, such as methanol, ethanol, propanol, isopropanol, n-propanol or glycerol, but most of the currently used proton exchange membranes are perfluorinated sulfonic acid membranes, so that when the catalyst layers are coated on the proton exchange membrane, the proton exchange membrane is swelled due to the existence of the alcohol solvents, and the quality of the proton exchange membrane is affected. In order to solve the swelling problem, people currently adopt two different coating methods, one is a protective film coating method, which comprises the steps of coating a first catalytic layer on one surface (A surface) of a proton exchange membrane, drying the first catalytic layer, then attaching a protective layer on the first catalytic layer, removing a bottom film, coating a second catalytic layer on the other surface (B surface) of the proton exchange membrane, drying the second catalytic layer, removing the protective layer to form a CCM membrane electrode, and finishing rolling, wherein the method can be seen in Chinese patent document CN 1084481139A; the second is an adsorption coating method, which is divided into two methods, the first method is a single-sided adsorption coating method, and the specific method is that a first catalytic layer is coated on one surface (A surface) of the proton exchange membrane, a second catalytic layer is coated on release paper, the first catalytic layer and the second catalytic layer are respectively dried, the second catalytic layer is thermally transferred to the other surface (B surface) of the proton exchange membrane with the bottom membrane removed, the release paper is removed to form a CCM membrane electrode, and the rolling is completed, wherein the method is disclosed in Chinese patent document CN 106784944A; the second method is a double-sided adsorption coating method, which comprises the specific steps of coating a first catalyst layer on first release paper, coating a second catalyst layer on second release paper, drying the first catalyst layer and the second catalyst layer respectively, then compounding the first catalyst layer and the second catalyst layer on two sides of a proton exchange membrane respectively, then removing the first release paper and the second release paper to form a CCM membrane electrode, and finishing rolling, wherein the method is disclosed in chinese patent document CN 109088073A.
In the three modes, the protective film or the release paper is removed to remove a part of the catalytic layer more or less, so that the problems of incomplete surface appearance of the catalytic layer and uneven thickness distribution of the catalytic layer are caused, which is not allowed.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides an adsorption coating method and equipment for a proton exchange membrane of a hydrogen fuel cell, which coat the A and B surfaces of the proton exchange membrane without using a transfer printing membrane.
The technical scheme of the utility model is that: the adsorption coating method for CCM membrane electrode of hydrogen fuel cell adopts proton exchange membrane with two sides, one side is adhered with protective film and called B side, and the other side is not adhered with protective film and called A side, and includes the following steps:
s1, coating a first catalytic layer on the surface A of the proton exchange membrane;
s2, baking the first catalytic layer at a first preset temperature;
s3, uncovering the protective film on the B surface of the proton exchange membrane;
s4, sucking the surface A of the proton exchange membrane by an adsorption device;
s5, coating a second catalytic layer on the surface B of the proton exchange membrane;
s6, keeping the adsorption state of the A surface of the proton exchange membrane, and baking the second catalyst layer at a second preset temperature to obtain the CCM membrane electrode.
As an improvement of the present invention, the step of adsorbing the a surface of the proton exchange membrane by the adsorption device is:
s31, coating the surface B of the proton exchange membrane by a preset distance before the second catalyst layer, and enabling the adsorption device to start adsorbing the surface A of the proton exchange membrane;
s32, keeping the adsorption state, and coating a second catalyst layer on the surface B of the proton exchange membrane;
and S33, continuing to keep the absorption state, and drying the second catalyst layer until the drying is finished.
As an improvement to the invention, said predetermined distance is chosen between 5-30 CM.
As a modification of the present invention, the first predetermined temperature is selected between 70 ℃ and 150 ℃.
As a refinement of the invention, the second predetermined temperature is selected between 70 ℃ and 150 ℃.
The utility model also provides a hydrogen fuel cell CCM membrane electrode's absorption coating equipment is suitable for the coating of volume to volume, include:
the unwinding mechanism is used for unwinding the proton exchange membrane, wherein the proton exchange membrane is provided with two surfaces, one surface is pasted with a protective film and is called a surface B, and the other surface is not pasted with the protective film and is called a surface A;
the first coating head is used for coating a first catalytic layer on the surface A of the proton exchange membrane;
the first baking oven is used for baking the first catalytic layer at a first preset temperature;
the protective film winding mechanism is used for collecting the protective film stripped from the surface B of the proton exchange membrane;
an adsorption device for adsorbing the A surface of the proton exchange membrane to be coated with the second catalyst layer;
the second coating head is used for coating a second catalyst layer on the surface B of the proton exchange membrane;
the second baking oven is used for baking the second catalytic layer at a second preset temperature under the condition that the adsorption device keeps an adsorption state; after the second baking oven is baked, the adsorption device releases the adsorption on the proton exchange membrane;
and the winding mechanism is used for winding the CCM membrane electrode.
As an improvement of the utility model, the adsorption device comprises an adsorption rotary belt, the adsorption rotary belt is formed by connecting a plurality of adsorption plates in series, each adsorption plate is provided with a plurality of vacuum holes, and the adsorption rotary belt is driven by a rotary mechanism to circularly move; the main vacuum tube is connected with an external vacuum source on one hand, and is connected with the vacuum groove through a plurality of vacuum sub-tubes on the other hand, the adsorption plate is arranged on the vacuum groove, when the adsorption plate passes through the area of the vacuum groove, the vacuum hole on the adsorption plate is communicated with the vacuum groove and adsorbs the proton exchange membrane, and the proton exchange membrane is driven to move in the second baking box.
As an improvement to the present invention, the adsorption plate is located at a predetermined distance from the start position of the adsorption plate before the second coating head.
As an improvement to the invention, said predetermined distance is chosen between 5-30 CM. .
As a refinement of the invention, the first predetermined temperature and the second predetermined temperature are selected between 70 degrees celsius and 150 degrees celsius.
The utility model discloses owing to adopted the adsorption method to adsorb proton exchange membrane, consequently, coating proton exchange membrane's B face is when, proton exchange membrane's width is motionless relatively, like this, even after second catalysis layer is scribbled to proton exchange membrane's B face, because adsorption equipment adsorbs proton exchange membrane motionless to keep adsorbing motionless state and getting into the second and toasting the case and toasting, make proton exchange membrane can not produce the phenomenon emergence of fold.
Drawings
Fig. 1 is a block diagram of an embodiment of the method of the present invention.
Fig. 2 is a schematic diagram of a further detailed block structure of the third step in fig. 1.
Fig. 3 is a schematic structural view of a first embodiment of the apparatus of the present invention.
Fig. 4 is an enlarged schematic view of the adsorption apparatus in fig. 3.
Fig. 5 is a schematic top view of the structure of fig. 4.
Fig. 6 is a schematic structural view of a second embodiment of the apparatus of the present invention.
Fig. 7 is a schematic structural view of a third embodiment of the apparatus of the present invention.
Fig. 8 is a schematic view showing a swing motion structure of the adsorption plate in fig. 7.
Detailed Description
Referring to fig. 1, fig. 1 shows an adsorption coating method for CCM membrane electrode of hydrogen fuel cell, wherein the adopted proton exchange membrane has two surfaces, one surface is coated with a protective film called B surface, and the other surface is not coated with a protective film called a surface, comprising the following steps:
s1, coating a first catalytic layer on the surface A of the proton exchange membrane, wherein the first catalytic layer can be a catalytic layer which takes Pt/C as a main component and takes a solvent as an alcohol substance, and the alcohol substance can be one or more of methanol, ethanol, propanol and isopropanol;
s2, baking the first catalyst layer at a first predetermined temperature, wherein the first predetermined temperature can be selected from 70 ℃ to 150 ℃, and the specific temperature is selected according to the components of the first catalyst layer;
s3, uncovering the protective film on the surface B of the proton exchange membrane to expose the surface B of the proton exchange membrane;
s4, absorbing the A surface of the proton exchange membrane by an absorption device, mainly keeping the width of the proton exchange membrane unchanged;
s5, coating a second catalytic layer on the B surface of the proton exchange membrane, wherein the second catalytic layer can be a catalytic layer which takes Pt/C as a main component and takes a solvent as an alcohol substance, and the alcohol substance can be one or more of methanol, ethanol, propanol and isopropanol;
s6, keeping the adsorption state of the A surface of the proton exchange membrane, baking the second catalyst layer at a second preset temperature, and after baking is finished, removing the adsorption of the A surface of the proton exchange membrane to obtain the CCM membrane electrode, wherein the second preset temperature can be selected from 70-150 ℃, and the specific temperature is selected according to the components of the first catalyst layer.
Referring to fig. 2, the step of adsorbing the a-side of the proton exchange membrane by the adsorption device is as follows:
s31, coating the surface B of the proton exchange membrane with a predetermined distance before the second catalyst layer, and starting to adsorb the surface A of the proton exchange membrane by the adsorption device, wherein the predetermined distance can be selected from 5-30 CM;
s32, keeping the adsorption state, and coating a second catalyst layer on the surface B of the proton exchange membrane;
and S33, continuing to keep the absorption state, and drying the second catalyst layer until the drying is finished.
Referring to fig. 3-5, fig. 3-5 illustrate an adsorption coating apparatus for a CCM membrane electrode of a hydrogen fuel cell, adapted for roll-to-roll coating, comprising:
the unwinding mechanism 1 is used for unwinding the proton exchange membrane 11, wherein the proton exchange membrane has two surfaces, one surface is pasted with a protective film and called a surface B, and the other surface is not pasted with the protective film and called a surface A;
the first coating head 2 is used for coating a first catalyst layer 12 on the surface A of the proton exchange membrane 11, wherein the first catalyst layer 12 can be a catalyst layer which takes Pt/C as a main component and takes an alcohol substance as a solvent, and the alcohol substance can be one or more of methanol, ethanol, propanol and isopropanol;
the first baking oven 3 is used for baking the first catalytic layer 12 at a first preset temperature, wherein the first preset temperature can be selected from 70-150 ℃, and the specific temperature is determined according to the components of the first catalytic layer;
the protective film winding mechanism 4 is used for collecting the protective film 13 stripped from the surface B of the proton exchange membrane 11 and exposing the surface B of the proton exchange membrane 11;
an adsorption device 5 for adsorbing the surface a of the proton exchange membrane to be coated with the second catalyst layer 14;
the second coating head 6 is used for coating a second catalyst layer 14 on the surface B of the proton exchange membrane;
a second baking oven 7 for baking the second catalytic layer 14 at a second predetermined temperature while the adsorption device 5 is kept in the adsorption state; after the second baking oven 7 is baked, the adsorption device 5 releases the adsorption on the proton exchange membrane; the second predetermined temperature can be selected from 70 ℃ to 150 ℃, and the specific temperature depends on the components of the second catalytic layer;
and the winding mechanism 8 is used for winding the CCM membrane electrode.
Preferably, the adsorption device 5 comprises an adsorption rotary belt 51, the adsorption rotary belt 51 is formed by connecting a plurality of adsorption plates 511 in series, each adsorption plate 511 is provided with a plurality of vacuum holes 512, and the adsorption rotary belt 51 circularly moves under the driving of a rotary mechanism 52 (in the embodiment, the rotary mechanism 52 is composed of four gears 521, and the front part, the rear part, the left part and the right part are respectively one, as shown in fig. 5); the main vacuum tube 53, the main vacuum tube 53 is connected to the external vacuum source on one hand, and is connected to the vacuum tank 54 through the plurality of vacuum sub-tubes 531 on the other hand, the adsorption plate 511 is disposed on the vacuum tank 54, when the adsorption plate 511 passes through the region of the vacuum tank 54, the vacuum holes 512 on the adsorption plate 511 are communicated with the vacuum tank 54, and adsorb the proton exchange membrane 11, and the proton exchange membrane 11 is carried to move into the second baking box 7.
Preferably, the initial position of the adsorption plate 511 is located a predetermined distance before the second coating head 6; the predetermined distance is selected between 5-30 CM. In this way, it is possible to ensure the relative positioning of proton exchange membrane 11 before coating second catalytic layer 14.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a second embodiment of the apparatus of the present invention. Compared with the embodiment shown in fig. 3, the embodiment shown in fig. 6 has the same general structure, except that the structure of the adsorption device 5 is different, in this embodiment, the adsorption device 5 includes an adsorption rotary belt 51, the adsorption rotary belt 51 is formed by connecting a plurality of adsorption plates 511 in series, each adsorption plate 511 is provided with a plurality of vacuum holes 512, the adsorption rotary belt 51 is driven by a rotary mechanism 52 to circularly move, the rotary mechanism 52 is composed of eight gears 521, one gear 521 is respectively arranged at the front, the rear, the left and the right of the upper layer, and one gear 521 is respectively arranged at the front, the rear, the left and the right of the lower layer, so as to form a frame-shaped rotary structure; the main vacuum tube 53, the main vacuum tube 53 is connected to the external vacuum source on one hand, and is connected to the vacuum tank 54 through the plurality of vacuum sub-tubes 531 on the other hand, the adsorption plate 511 is disposed on the vacuum tank 54, when the adsorption plate 511 passes through the region of the vacuum tank 54, the vacuum holes 512 on the adsorption plate 511 are communicated with the vacuum tank 54, and adsorb the proton exchange membrane 11, and the proton exchange membrane 11 is carried to move into the second baking box 7.
Referring to fig. 7 and 8, fig. 7 and 8 are schematic structural views of a third embodiment of the apparatus of the present invention. The embodiment shown in fig. 7 and 8 has the same general structure as the embodiment shown in fig. 3, except that the structure of the adsorption device 5 is different, in this embodiment, the adsorption device 5 includes an adsorption rotary belt 51, the adsorption rotary belt 51 is formed by a plurality of adsorption plates 511 which are adjacent to each other, each adsorption plate 511 is provided with a plurality of vacuum holes 512, the adsorption plates 511 are driven by a first driving mechanism 5111, a second driving mechanism 5112, a third driving mechanism 5113 and a fourth driving mechanism 5114 to circularly move on a horizontal plane, a main vacuum pipe 53, the main vacuum pipe 53 is connected to an external vacuum source on one hand, and is connected to a vacuum tank 54 through a plurality of vacuum branch pipes 531 on the other hand, the adsorption plates 511 are provided on the vacuum tank 54, when the adsorption plates 511 pass through the area of the vacuum tank 54, the vacuum holes 512 on the adsorption plates 511 are communicated with the vacuum tank 54 and adsorb the proton exchange membrane 11, carrying the proton exchange membrane 11 inside the second baking chamber 7.
The first, second, third, and fourth driving mechanisms 5111, 5112, 5113, and 5114 are linear driving mechanisms.
Claims (5)
1. An adsorption coating device for CCM membrane electrode of hydrogen fuel cell, which is suitable for roll-to-roll coating and is characterized by comprising:
the unwinding mechanism (1) is used for unwinding a proton exchange membrane (11), wherein the proton exchange membrane is provided with two surfaces, one surface is pasted with a protective film and is called a surface B, and the other surface is not pasted with the protective film and is called a surface A;
a first coating head (2) for coating a first catalyst layer (12) on the A surface of the proton exchange membrane (11);
a first baking oven (3) for baking the first catalytic layer (12) at a first predetermined temperature;
the protective film winding mechanism (4) is used for collecting the protective film (13) stripped from the surface B of the proton exchange membrane (11);
an adsorption device (5) for adsorbing the A surface of the proton exchange membrane to be coated with the second catalyst layer (14);
a second coating head (6) for coating a second catalyst layer (14) on the surface B of the proton exchange membrane;
the second baking oven (7) is used for baking the second catalyst layer (14) at a second preset temperature under the condition that the adsorption device (5) keeps an adsorption state; after the second baking oven (7) is baked, the adsorption device (5) releases the adsorption on the proton exchange membrane;
and the winding mechanism (8) is used for winding the CCM membrane electrode.
2. The absorption coating device for the CCM membrane electrode of the hydrogen fuel cell according to claim 1, wherein the absorption device (5) comprises an absorption rotary belt (51), the absorption rotary belt (51) is formed by connecting a plurality of absorption plates (511) in series, each absorption plate (511) is provided with a plurality of vacuum holes (512), and the absorption rotary belt (51) is driven by a rotary mechanism (52) to circularly move; the main vacuum tube (53), on one hand, the main vacuum tube (53) is connected with an external vacuum source, on the other hand, the main vacuum tube is connected with the vacuum groove (54) through a plurality of vacuum sub-tubes (531), the adsorption plate (511) is arranged on the vacuum groove (54), when the adsorption plate (511) passes through the area where the vacuum groove (54) is located, the vacuum hole (512) on the adsorption plate (511) is communicated with the vacuum groove (54) and adsorbs the proton exchange membrane (11), and the proton exchange membrane (11) is carried to move towards the second baking box (7).
3. The absorption coating device for the CCM membrane electrode of the hydrogen fuel cell according to claim 2, wherein the absorption device (5) comprises an absorption rotary belt (51), the absorption rotary belt (51) is formed by connecting a plurality of absorption plates (511) in series, each absorption plate (511) is provided with a plurality of vacuum holes (512), the absorption rotary belt (51) circularly moves under the driving of a rotary mechanism (52), and the rotary mechanism (52) is formed by a plurality of gears (521) to form a frame-shaped rotary structure; the main vacuum tube (53), on one hand, the main vacuum tube (53) is connected with an external vacuum source, on the other hand, the main vacuum tube is connected with the vacuum groove (54) through a plurality of vacuum sub-tubes (531), the adsorption plate (511) is arranged on the vacuum groove (54), when the adsorption plate (511) passes through the area where the vacuum groove (54) is located, the vacuum hole (512) on the adsorption plate (511) is communicated with the vacuum groove (54) and adsorbs the proton exchange membrane (11), and the proton exchange membrane (11) is carried to move towards the second baking box (7).
4. The adsorption coating device of hydrogen fuel cell CCM membrane electrode according to claim 2, characterized in that the adsorption device (5) comprises an adsorption rotary belt (51), the adsorption rotary belt (51) is formed by a plurality of adsorption plates (511) in an abutting mode, each adsorption plate (511) is provided with a plurality of vacuum holes (512), the adsorption plates (511) are driven by a first driving mechanism (5111), a second driving mechanism (5112), a third driving mechanism (5113) and a fourth driving mechanism (5114) to circularly move on a horizontal plane, a main vacuum pipe (53), the main vacuum pipe (53) is connected with an external vacuum source on one hand and is connected with the vacuum groove (54) through a plurality of vacuum branch pipes (531), the adsorption plate (511) is arranged on the vacuum groove (54), when the adsorption plate (511) passes through the area where the vacuum groove (54) is located, the vacuum holes (512) on the adsorption plate (511) are communicated with the vacuum groove (54), adsorb the proton exchange membrane (11), and bring the proton exchange membrane (11) to move towards the second baking box (7).
5. The apparatus for adsorptive coating of a hydrogen fuel cell CCM membrane electrode according to claim 1, 2 or 3, wherein said first predetermined temperature and said second predetermined temperature are selected between 70 degrees Celsius and 150 degrees Celsius.
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| CN201921092705.5U CN209981371U (en) | 2019-07-12 | 2019-07-12 | Adsorption coating equipment for hydrogen fuel cell CCM membrane electrode |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265673A (en) * | 2019-07-12 | 2019-09-20 | 深圳市信宇人科技股份有限公司 | The absorption coating apparatus of hydrogen fuel cell CCM membrane electrode |
| CN112536193A (en) * | 2020-12-03 | 2021-03-23 | 中国科学院大连化学物理研究所 | Continuous coating production equipment and process for fuel cell catalyst layer |
| CN114204045A (en) * | 2021-10-26 | 2022-03-18 | 东风汽车集团股份有限公司 | Preparation equipment and system of fuel cell membrane electrode |
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2019
- 2019-07-12 CN CN201921092705.5U patent/CN209981371U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265673A (en) * | 2019-07-12 | 2019-09-20 | 深圳市信宇人科技股份有限公司 | The absorption coating apparatus of hydrogen fuel cell CCM membrane electrode |
| CN112536193A (en) * | 2020-12-03 | 2021-03-23 | 中国科学院大连化学物理研究所 | Continuous coating production equipment and process for fuel cell catalyst layer |
| CN114204045A (en) * | 2021-10-26 | 2022-03-18 | 东风汽车集团股份有限公司 | Preparation equipment and system of fuel cell membrane electrode |
| CN114204045B (en) * | 2021-10-26 | 2023-08-22 | 东风汽车集团股份有限公司 | Preparation equipment and system of fuel cell membrane electrode |
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