阅读说明：本技术 一种燃料电池膜电极涂布上料装置与方法 (Fuel cell membrane electrode coating feeding device and method ) 是由 唐海 张禾 司永成 于 2020-07-13 设计创作，主要内容包括：本发明涉及一种燃料电池膜电极涂布上料装置,包括浆料罐、浆料槽、低温恒温槽,低温恒温槽中注入有制冷剂,浆料罐置于低温恒温槽中,浆料罐中注入有浆料,浆料罐内浆料底部插入有取浆料管,取浆料管另一端连接浆料泵,浆料泵的输出端通过管道连接浆料槽,浆料泵与浆料槽之间的管道上依次设置有浆料管路开关阀、浆料流量调节阀、浆料测温计,涂布辊的下部浸入于浆料池的浆料中,并通过转动将浆料带起,涂布辊外表面分布有若干孔穴,填充在涂布辊孔穴中的浆料被转移至涂布辊上方的离型背膜上；本发明能够解决膜电极间接涂布制备CCM过程中,涂布料槽内料液温度受环境影响问题,避免浆料受热升温,粘度降低、易出现气泡,涂布不均匀问题。(The invention relates to a fuel cell membrane electrode coating feeding device, which comprises a slurry tank, a slurry tank and a low-temperature constant-temperature tank, wherein a refrigerant is injected into the low-temperature constant-temperature tank, the slurry tank is arranged in the low-temperature constant-temperature tank, slurry is injected into the slurry tank, a slurry taking pipe is inserted into the bottom of the slurry in the slurry tank, the other end of the slurry taking pipe is connected with a slurry pump, the output end of the slurry pump is connected with the slurry tank through a pipeline, a slurry pipeline switching valve, a slurry flow regulating valve and a slurry temperature meter are sequentially arranged on the pipeline between the slurry pump and the slurry tank, the lower part of a coating roller is immersed into the slurry in the slurry tank and is lifted up by rotation, a plurality of holes are distributed on the outer surface of the coating roller, and the slurry filled in the holes of the coating roller is transferred to a release back film above the; the invention can solve the problem that the temperature of the slurry in the coating material groove is influenced by the environment in the process of preparing CCM by membrane electrode indirect coating, and avoids the problems of slurry heating, viscosity reduction, easy bubble generation and uneven coating.)

1. A fuel cell membrane electrode coating loading device is characterized in that: comprises a slurry tank (2), a slurry tank (7) and a low-temperature constant-temperature tank (15), wherein a refrigerant (16) is injected into the low-temperature constant-temperature tank (15), the slurry tank (2) is arranged in the low-temperature constant-temperature tank (15), a slurry (1) is injected into the slurry tank (2), a slurry taking pipe is inserted into the bottom of the slurry (1) in the slurry tank (2), the other end of the slurry taking pipe is connected with a slurry pump (3), the slurry pump (3) is used for pumping out and pressurizing and discharging the slurry (1) in the slurry tank (2), the output end of the slurry pump (3) is connected with the slurry tank (7) through a pipeline, a slurry pipeline switch valve (4), a slurry flow regulating valve (5) and a slurry thermometric meter (6) are sequentially arranged on a pipeline between the slurry pump (3) and the slurry tank (7), and the slurry (1) flows into the slurry tank (7) under the action of the slurry pump (3), a coating roller (9) is immersed in a slurry pool of the slurry tank (7), the lower part of the coating roller (9) is immersed in the slurry (1) in the slurry pool and the slurry (1) is taken up through rotation, a plurality of holes are distributed on the outer surface of the coating roller (9), and the slurry (1) filled in the holes of the coating roller (9) is transferred to a release back film (11) above the coating roller (9).

2. The fuel cell membrane electrode coating loading apparatus according to claim 1, wherein: coating roller (9) one side is provided with scraper (13), scraper (13) are connected with coating roller (9) surface contact, scraper (13) are used for scraping unnecessary thick liquids (1) and drop into thick liquids groove (7) with used repeatedly, twine on driving roller one (10) and driving roller two (12) from type notacoria (11), driving roller one (10), driving roller two (12) are used for the transmission to leave type notacoria (11).

3. The fuel cell membrane electrode coating loading apparatus according to claim 1, wherein: slurry tank (7) has been arranged thick liquids level gauge (8), thick liquids level gauge (8) are connected with thick liquids flow control valve (5), thick liquids level gauge (8) are used for controlling adjusting flow valve (5) in order to guarantee that slurry tank (7) interior thick liquids liquid level is stable.

4. The fuel cell membrane electrode coating loading apparatus according to claim 1, wherein: slurry tank (2) has arranged slurry level gauge two (14), slurry level gauge two (14) are connected with slurry pipeline switch valve (4), slurry level gauge two (14) are used for monitoring the liquid level in slurry tank (2).

5. The fuel cell membrane electrode coating loading apparatus according to claim 1, wherein: the bottom in the low-temperature constant-temperature trough (15) is connected into a jacket of a slurry trough (7) through a refrigerant pipeline, the jacket of the slurry trough (7) is arranged below a slurry pool of the slurry trough (7), a refrigerant (16) in the jacket is used for carrying out heat exchange and temperature reduction on slurry (1) in the slurry pool, a refrigerant pipeline switch valve (17) and a refrigerant flow regulating valve (18) are arranged on the refrigerant pipeline, a refrigerant backflow pipeline is connected between the jacket of the slurry trough (7) and the low-temperature constant-temperature trough (15), a refrigerant pipeline switch valve (19) is arranged on the refrigerant backflow pipeline, and the refrigerant backflow pipeline is used for enabling the refrigerant (16) which is subjected to heat exchange and temperature rise with the slurry (1) to flow out of the slurry trough (7) and return to the low-temperature constant-temperature trough (15) for temperature reduction and repeated use.

6. The fuel cell membrane electrode coating loading apparatus according to claim 5, wherein: slurry tank (7) include curb plate one (21), curb plate two (22), arc (23), curb plate three (24), curb plate four (25), bottom plate (26), the open rectangular frame in lower extreme about the synthesis is enclosed in curb plate one (21), curb plate two (22), curb plate three (24), curb plate four (25), the rectangular frame bottom is connected with bottom plate (26), arc (23) are installed to the top of rectangular frame inside bottom plate (26), upper portion forms the slurry pond that is used for depositing thick liquids (1) in arc (23).

7. The fuel cell membrane electrode coating loading apparatus according to claim 6, wherein: a jacket for storing a refrigerant (16) is formed between the bottom end of the arc-shaped plate (23) and the bottom plate (26), refrigerant flow channels are arranged in the jacket, the refrigerant flow channels are arranged in a multi-flow structure, and the multi-flow structure is used for controlling the flowing distribution of the refrigerant.

8. The fuel cell membrane electrode coating loading apparatus according to claim 7, wherein: the slurry tank (7) is provided with a first partition plate (27), a second partition plate (28), a third partition plate (29), a fourth partition plate (30), a fifth partition plate (31) and a sixth partition plate (32) at the bottom, the first partition plate (27) and the fifth partition plate (31) are arranged between the arc-shaped plate (23) and the bottom plate (26) and are vertically arranged, the first partition plate (27) and the third partition plate (29) as well as the fifth partition plate (31) and the fourth partition plate (30) respectively form an L shape, the top ends of the first partition plate (27) and the third partition plate (29) are connected with the second partition plate (28), the fifth partition plate (31) and the fourth partition plate (30) are connected with the sixth partition plate (32), the second partition plate (28) and the sixth partition plate (32) are horizontally arranged, the fourth partition plate (30), the fifth partition plate (31), the sixth partition plate (32) and the fourth partition plate (25) and the bottom plate (26), The refrigerant second flow is formed by the first side plate (21), the arc-shaped plate (23) and the fourth side plate (25), the third flow is formed by the first side plate (21), the first partition plate (27), the fifth partition plate (31) and the bottom plate (26), the fourth flow is formed by the first partition plate (27), the second partition plate (28), the third partition plate (29), the second side plate (22) and the third side plate (24), and the fifth flow is formed by the second partition plate (28), the second side plate (22), the arc-shaped plate (23) and the first side plate (21).

9. The fuel cell membrane electrode coating loading apparatus according to claim 8, wherein: the bottom plate (26) is provided with a refrigerant inlet, a refrigerant outlet, a first slurry inlet and a second slurry inlet, the refrigerant inlet is connected with a refrigerant inlet connecting pipe (34) and is connected with a refrigerant pipeline through the refrigerant inlet connecting pipe (34), the refrigerant outlet is connected with a refrigerant outlet connecting pipe (33) and is connected with a refrigerant backflow pipeline through the refrigerant outlet connecting pipe (33), the first slurry inlet and the second slurry inlet are respectively connected with a first slurry inlet connecting pipe (35) and a second slurry inlet connecting pipe (36) and are connected with a slurry taking pipe through the first slurry inlet connecting pipe (35) and the second slurry inlet connecting pipe (36), and the first slurry inlet connecting pipe (35) and the second slurry inlet connecting pipe (36) extend to the upper end face of the arc-shaped connecting pipe (23).

10. A method of loading a fuel cell membrane electrode coating loading apparatus according to any one of claims 1 to 9, comprising the steps of: firstly, injecting a refrigerant (16) into a low-temperature constant-temperature tank (15), and controlling the temperature of the refrigerant (16) to be 5-8 ℃ by the low-temperature constant-temperature tank (15); then according to the coating demand, injecting the slurry (1) into the slurry tank (2), and then placing the slurry tank (2) into a low-temperature constant-temperature tank (15); inserting a slurry taking pipe into the bottom of the slurry (1) and connecting the slurry taking pipe with a slurry pump (3), pumping the slurry (1) out of the slurry tank (2) by the slurry pump (3) and discharging the slurry in a pressurized manner, wherein the slurry (1) flows into a slurry pool of a slurry tank (7) after flowing through a slurry pipeline switch valve (4), a slurry flow regulating valve (5) and a slurry thermodetector (6); finally, part of the volume of the coating roller (9) is immersed in the slurry tank (7), the slurry (1) is lifted by rotation, and the slurry (1) filled in the holes of the coating roller (9) can be transferred to the release back film (11).

[ technical field ]

The invention belongs to the technical field of hydrogen energy, and particularly relates to a fuel cell membrane electrode coating feeding device and a method.

[ background art ]

The hydrogen fuel cell is a catalytic H₂、O₂The energy conversion device for converting chemical energy into electricity has the characteristics of high efficiency and environmental protection. With the increasing global energy shortage and the increasing environmental protection requirement, the application demand of hydrogen fuel cells is increasing. The hydrogen fuel cell core component membrane electrode is used for providing a fuel cell electrochemical reaction area and consists of a proton exchange membrane, a catalyst and a gas diffusion layer, wherein the catalyst is adhered and attached to the proton membrane.

In the membrane electrode preparation process, a catalyst is prepared on a proton exchange membrane to form a CCM (catalyst-coated membrane, CCM for short). The membrane electrode CCM preparation process can be summarized into two types, one is a slit extrusion direct coating method, in which a catalyst is directly coated on the two side surfaces of a proton membrane. Secondly, indirect coating and transfer printing: coating slurry containing a catalyst on a release backing film, drying the slurry after a solvent on the release backing film is volatilized, then carrying out hot-pressing transfer printing on the catalyst on the surface of the proton membrane, and removing the release backing film. To ensure coating quality, the coating process requires that the slurry temperature be generally below 10 ℃. The second kind of process avoids the direct contact and swelling between the proton membrane and the solvent in the slurry, the process quality reliability is high, the coating equipment used in the process mostly adopts the structure of transfer and micro-concave roller, and the coating principle is as follows: the coating roller is partially immersed in the coating material groove, slurry is carried by rotating, the slurry filled in holes of the coating roller is transferred to a coating substrate to complete coating, and the redundant slurry is scraped by a scraper and falls into the slurry groove for reuse.

At present, a temperature control structure is not generally arranged in a slurry trough used in a transfer type or micro-concave roller coating machine, so that the temperature and physical properties of slurry in the trough are easily influenced by the environmental temperature to rise, the viscosity of the slurry is reduced, the fluidity is enhanced, the problems of uneven slurry coating, inconsistent thickness, reduced power generation performance of a membrane electrode, shortened service life and the like are easily caused.

[ summary of the invention ]

The invention aims to solve the defects and provide a fuel cell membrane electrode coating and feeding device, which can solve the problem that the temperature of a material liquid in a coating material groove is influenced by the environment in the process of preparing CCM by membrane electrode indirect coating and avoid the problems of slurry heating, viscosity reduction, easy bubble generation and uneven coating.

The fuel cell membrane electrode coating feeding device comprises a slurry tank 2, a slurry tank 7 and a low-temperature constant-temperature tank 15, wherein a refrigerant 16 is injected into the low-temperature constant-temperature tank 15, the slurry tank 2 is arranged in the low-temperature constant-temperature tank 15, a slurry 1 is injected into the slurry tank 2, a slurry taking pipe is inserted into the bottom of the slurry 1 in the slurry tank 2, the other end of the slurry taking pipe is connected with a slurry pump 3, the slurry pump 3 is used for taking out and pressurizing and discharging the slurry 1 in the slurry tank 2, the output end of the slurry pump 3 is connected with the slurry tank 7 through a pipeline, a slurry pipeline switch valve 4, a slurry flow regulating valve 5 and a slurry temperature measuring meter 6 are sequentially arranged on a pipeline between the slurry pump 3 and the slurry tank 7, the slurry 1 flows into the slurry tank of the slurry tank 7 under the action of the slurry pump 3, and a coating roller 9 is immersed in the slurry tank of the slurry tank 7, the lower part of the coating roller 9 is immersed in the slurry 1 in the slurry pool, the slurry 1 is taken up by rotation, a plurality of holes are distributed on the outer surface of the coating roller 9, and the slurry 1 filled in the holes of the coating roller 9 is transferred to a release back film 11 above the coating roller 9.

Further, a scraper 13 is arranged on one side of the coating roller 9, the scraper 13 is in contact connection with the outer surface of the coating roller 9, the scraper 13 is used for scraping off the redundant slurry 1 and dropping the redundant slurry into the slurry groove 7 for repeated use, the release back film 11 is wound on the first driving roller 10 and the second driving roller 12, and the first driving roller 10 and the second driving roller 12 are used for driving the release back film 11.

Further, thick liquids tank 7 has arranged thick liquids level gauge 8, thick liquids level gauge 8 is connected with thick liquids flow control valve 5, thick liquids level gauge 8 is used for controlling adjusting flow valve 5 in order to guarantee that thick liquids level is stable in thick liquids tank 7.

Further, slurry tank 2 has arranged slurry level gauge two 14, slurry level gauge two 14 is connected with slurry pipeline switching valve 4, slurry level gauge two 14 is used for monitoring the liquid level in slurry tank 2.

Further, the bottom of the low-temperature constant-temperature tank 15 is connected to a jacket of the slurry tank 7 through a refrigerant pipeline, the jacket of the slurry tank 7 is arranged below a slurry pool of the slurry tank 7, a refrigerant 16 in the jacket is used for heat exchange and temperature reduction of the slurry 1 in the slurry pool, a refrigerant pipeline switch valve 17 and a refrigerant flow regulating valve 18 are arranged on the refrigerant pipeline, a refrigerant backflow pipeline is connected between the jacket of the slurry tank 7 and the low-temperature constant-temperature tank 15, a refrigerant pipeline switch valve 19 is arranged on the refrigerant backflow pipeline, and the refrigerant backflow pipeline is used for enabling the refrigerant 16 which has heat exchange and temperature rise with the slurry 1 to flow out of the slurry tank 7 and return to the low-temperature constant-temperature tank 15 for temperature reduction and reuse.

Further, the slurry tank 7 comprises a first side plate 21, a second side plate 22, an arc-shaped plate 23, a third side plate 24, a fourth side plate 25 and a bottom plate 26, the first side plate 21, the second side plate 22, the third side plate 24 and the fourth side plate 25 form a rectangular frame with an upper end and a lower end open, the bottom end of the rectangular frame is connected with the bottom plate 26, the arc-shaped plate 23 is installed above the bottom plate 26 inside the rectangular frame, and a slurry pool for storing the slurry 1 is formed in the inner upper portion of the arc-shaped plate 23.

Further, a jacket for storing the refrigerant 16 is formed between the bottom end of the arc-shaped plate 23 and the bottom plate 26, a refrigerant flow channel is arranged in the jacket, and the refrigerant flow channel is arranged in a multi-flow structure for controlling the flow distribution of the refrigerant.

Further, a first partition plate 27, a second partition plate 28, a third partition plate 29, a fourth partition plate 30, a fifth partition plate 31 and a sixth partition plate 32 are arranged at the bottom in the slurry tank 7, the first partition plate 27 and the fifth partition plate 31 are arranged between the arc-shaped plate 23 and the bottom plate 26 and are vertically arranged, the first partition plate 27 and the third partition plate 29, the fifth partition plate 31 and the fourth partition plate 30 respectively form an L shape, the second partition plate 28 is connected to the top ends of the first partition plate 27 and the third partition plate 29, the sixth partition plate 32 is connected to the top ends of the fifth partition plate 31 and the fourth partition plate 30, the second partition plate 28 and the sixth partition plate 32 are horizontally arranged, the fourth partition plate 30, the fifth partition plate 31, the sixth partition plate 32, the fourth side plate 25 and the bottom plate 26 separate a first refrigerant flow path, the sixth partition plate 32, the first side plate 21, the arc-shaped plate 23 and the fourth side plate 25 form a second refrigerant flow path, the, the first partition plate 27, the second partition plate 28, the third partition plate 29, the second side plate 22 and the third side plate 24 form a fourth flow path, and the second partition plate 28, the second side plate 22, the arc-shaped plate 23 and the first side plate 21 form a fifth flow path.

Further, a refrigerant inlet, a refrigerant outlet, a first slurry inlet and a second slurry inlet are formed in the bottom plate 26, the refrigerant inlet is connected with a refrigerant inlet connecting pipe 34 and is connected with a refrigerant pipeline through the refrigerant inlet connecting pipe 34, the refrigerant outlet is connected with a refrigerant outlet connecting pipe 33 and is connected with a refrigerant return pipeline through the refrigerant outlet connecting pipe 33, the first slurry inlet and the second slurry inlet are respectively connected with a first slurry inlet connecting pipe 35 and a second slurry inlet connecting pipe 36 and are connected with a slurry taking pipe through the first slurry inlet connecting pipe 35 and the second slurry inlet connecting pipe 36, and the first slurry inlet connecting pipe 35 and the second slurry inlet connecting pipe 36 both extend to the upper end face of the arc-shaped plate 23.

The invention also provides a feeding method of the fuel cell membrane electrode coating feeding device, which comprises the following steps: firstly, injecting a refrigerant 16 into a low-temperature constant-temperature tank 15, and controlling the temperature of the refrigerant 16 to be 5-8 ℃ by the low-temperature constant-temperature tank 15; then according to the coating demand, injecting the slurry 1 into the slurry tank 2, and then placing the slurry tank 2 into the low-temperature constant-temperature tank 15; inserting a slurry taking pipe into the bottom of slurry 1, connecting the slurry taking pipe with a slurry pump 3, pumping the slurry 1 out of a slurry tank 2 by the slurry pump 3, pressurizing and discharging the slurry, wherein the slurry 1 flows into a slurry pool of a slurry tank 7 after flowing through a slurry pipeline switching valve 4, a slurry flow regulating valve 5 and a slurry thermodetector 6; finally, a part of the volume of the coating roll 9 is immersed in the slurry tank 7, and the slurry 1 is taken up by rotation, and the slurry 1 filled in the holes of the coating roll 9 can be transferred onto the release backing film 11.

Compared with the prior art, the invention has the following advantages:

(1) the invention provides a fuel cell membrane electrode coating feeding device and a method, which can solve the problem that the temperature of a material liquid in a coating material groove is influenced by the environment in the process of preparing CCM by membrane electrode indirect coating;

(2) the slurry tank is internally provided with the multi-flow refrigerant flow channel, so that the turbulence degree of the refrigerant is increased, the heat transfer efficiency is improved, and the uniform heat dissipation of the slurry along the length direction of the slurry tank is facilitated;

(3) the slurry tank disclosed by the invention realizes the largest contact area between the refrigerant and the heat exchange arc-shaped plate, improves the heat exchange efficiency, and can avoid the problems of slurry heating, viscosity reduction, easy bubble generation and uneven coating;

(4) the slurry tank is formed by welding thin metal plates, so that the weight and the thermal inertia of the equipment are reduced, and the rapid cooling and temperature control operation of the slurry is facilitated.

[ description of the drawings ]

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the external structure of the slurry tank of the present invention;

FIG. 3 is a schematic view of the internal structure of the slurry tank of the present invention;

FIG. 4 is a front view of the interior of the slurry tank of the present invention taken along the length thereof;

FIG. 5 is a diagram of the refrigerant flow path within the slurry tank of the present invention;

FIG. 6 is a view showing the arrangement of the inlet and outlet adapter of the slurry tank of the present invention;

in the figure: 1. slurry 2, a slurry tank 3, a slurry pump 4, a slurry pipeline switch valve 5, a slurry flow regulating valve 6, a slurry thermometer 7, a slurry tank 8, a first slurry liquid level meter 9, a coating roller 10, a first driving roller 11, a release back film 12, a second driving roller 13, a scraper 14, a second slurry liquid level meter 15, a low-temperature constant-temperature tank 16, a refrigerant 17 and a refrigerant pipeline switch valve 18, the device comprises a refrigerant flow regulating valve 19, a refrigerant pipeline switch valve 21, a first side plate 22, a second side plate 23, an arc-shaped plate 24, a third side plate 25, a fourth side plate 26, a bottom plate 27, a first partition plate 28, a second partition plate 29, a third partition plate 30, a fourth partition plate 31, a fifth partition plate 32, a sixth partition plate 33, a refrigerant outlet connecting pipe 34, a refrigerant inlet connecting pipe 35, a first slurry inlet connecting pipe 36 and a second slurry inlet connecting pipe.

[ detailed description of the invention ]

The invention is further described below with reference to the accompanying drawings:

as shown in the attached figure 1, the invention provides a fuel cell membrane electrode coating feeding device, which comprises a slurry tank 2, a slurry tank 7 and a low-temperature constant-temperature tank 15, wherein a refrigerant 16 is injected into the low-temperature constant-temperature tank 15, the slurry tank 2 is arranged in the low-temperature constant-temperature tank 15, a slurry 1 is injected into the slurry tank 2, a slurry taking pipe is inserted into the bottom of the slurry 1 in the slurry tank 2, the other end of the slurry taking pipe is connected with a slurry pump 3, the slurry pump 3 is used for pumping out and pressurizing and discharging the slurry 1 in the slurry tank 2, the output end of the slurry pump 3 is connected with the slurry tank 7 through a pipeline, a slurry pipeline between the slurry pump 3 and the slurry tank 7 is sequentially provided with a slurry pipeline switching valve 4, a slurry flow regulating valve 5 and a slurry temperature detector 6, the slurry 1 flows into a slurry pool of the slurry tank 7 under the action of the slurry pump 3, a coating roller 9 is immersed into the slurry pool of the slurry tank 7, and the lower part of the coating roller 9 is immersed into the slurry 1 in the, the slurry 1 is taken up by rotation, a plurality of holes are distributed on the outer surface of the coating roller 9, and the slurry 1 filled in the holes of the coating roller 9 is transferred to a release back film 11 above the coating roller 9; coating roll 9 one side is provided with scraper 13, and scraper 13 is connected with coating roll 9 surface contact, and scraper 13 is used for scraping unnecessary thick liquids 1 and drops into thick liquids groove 7 with used repeatedly, from type notacoria 11 twines on driving roller one 10 and driving roller two 12, and driving roller one 10, driving roller two 12 are used for the transmission from type notacoria 11.

The slurry tank 7 is provided with a first slurry liquid level meter 8, the first slurry liquid level meter 8 is connected with the slurry flow regulating valve 5, and the first slurry liquid level meter 8 is used for controlling the regulating flow valve 5 to ensure that the slurry liquid level in the slurry tank 7 is stable; the slurry tank 2 is provided with a second slurry liquid level meter 14, the second slurry liquid level meter 14 is connected with the slurry pipeline switching valve 4, and the second slurry liquid level meter 14 is used for monitoring the liquid level in the slurry tank 2; the bottom in the low-temperature constant-temperature trough 15 is connected to the jacket of the slurry trough 7 through a refrigerant pipeline, the jacket of the slurry trough 7 is arranged below the slurry pool of the slurry trough 7, a refrigerant 16 in the jacket is used for carrying out heat exchange and cooling on the slurry 1 in the slurry pool, a refrigerant pipeline switch valve 17 and a refrigerant flow regulating valve 18 are arranged on the refrigerant pipeline, a refrigerant backflow pipeline is connected between the jacket of the slurry trough 7 and the low-temperature constant-temperature trough 15, a refrigerant pipeline switch valve 19 is arranged on the refrigerant backflow pipeline, and the refrigerant backflow pipeline is used for enabling the refrigerant 16 subjected to heat exchange and temperature rise with the slurry 1 to flow out of the slurry trough 7 and return to the low-temperature constant-temperature trough 15 for cooling and reuse.

The invention discloses a fuel cell membrane electrode coating feeding method, which comprises the following steps: a refrigerant 16 is injected into the cryostat 15, and the temperature of the refrigerant 16 is controlled to 5 to 8 ℃ by the cryostat 15. According to the coating amount demand, preparing slurry 1 and injecting the slurry into a slurry tank 2, and then placing the slurry tank 2 into a low-temperature constant-temperature tank 15. The slurry taking pipe is inserted into the bottom of the slurry 1 and connected with the slurry pump 3, the slurry pump 3 pumps the slurry out of the slurry tank 2, the slurry is pressurized and discharged, and the slurry flows into a slurry pool of the slurry tank 7 after flowing through the slurry pipeline switching valve 4, the slurry flow regulating valve 5 and the slurry thermodetector 6. Part of the volume of the coating roller 9 is immersed in the slurry tank 7 (i.e., coating cloth tank), and the slurry 1 is taken up by rotation, the slurry filled in the holes of the coating roller 9 is transferred to the release backing film 11, and the excess slurry is scraped off by the scraper 13 and falls into the slurry tank for reuse.

The first transmission roller 10 and the second transmission roller 12 are used for transmitting the release back film; the first slurry liquid level meter 8 is used for controlling the slurry flow regulating valve 5 so as to ensure that the slurry liquid level in the slurry tank is stable; and a second slurry liquid level meter 14 is arranged in the slurry tank 2 and used for monitoring the liquid level in the slurry tank 2, and when the lowest liquid level is monitored, the slurry can be supplemented or the slurry pipeline is cut off, and the valve 4 is opened and closed to stop feeding. In order to avoid heat absorption and temperature rise of the feed liquid in the pipeline transportation process, the temperature of the feed liquid in the slurry tank 7 is further controlled. The refrigerant is led out from the low-temperature constant-temperature tank, flows through the refrigerant pipeline switch valve 17 and the refrigerant flow regulating valve 18, and then flows into the jacket of the slurry tank 7 to exchange heat and reduce the temperature of the slurry. The refrigerant flow is controlled by a refrigerant flow control valve 18 and is used for controlling the slurry heat exchange load. The refrigerant after heat exchange and temperature rise with the slurry flows out of the slurry trough, flows through the refrigerant pipeline switching valve 19 and then returns to the low-temperature constant-temperature trough 15 to be cooled for reuse.

As shown in the attached drawing 2, the slurry tank 7 comprises a first side plate 21, a second side plate 22, an arc-shaped plate 23, a third side plate 24, a fourth side plate 25 and a bottom plate 26, wherein the first side plate 21, the second side plate 22, the third side plate 24 and the fourth side plate 25 enclose a rectangular frame with an upper end and a lower end open, the bottom end of the rectangular frame is connected with the bottom plate 26, the arc-shaped plate 23 is installed above the bottom plate 26 inside the rectangular frame, and a slurry pool for storing the slurry 1 is formed at the inner upper part of the arc-shaped plate.

A jacket for storing the refrigerant 16 is formed between the bottom end of the arc-shaped plate 23 and the bottom plate 26, a refrigerant flow channel is arranged in the jacket, the refrigerant flow channel is arranged in a multi-flow structure, and the multi-flow structure is used for controlling the flowing distribution of the refrigerant and improving the temperature uniformity of heat exchange with the slurry.

As shown in fig. 3 and 4, a first partition plate 27, a second partition plate 28, a third partition plate 29, a fourth partition plate 30, a fifth partition plate 31 and a sixth partition plate 32 are arranged at the bottom in the slurry tank 7, the first partition plate 27 and the fifth partition plate 31 are arranged between the arc-shaped plate 23 and the bottom plate 26 and are vertically arranged, the first partition plate 27 and the third partition plate 29, the fifth partition plate 31 and the fourth partition plate 30 respectively form an L shape, the second partition plate 28 is connected to the top ends of the first partition plate 27 and the third partition plate 29, the sixth partition plate 32 is connected to the top ends of the fifth partition plate 31 and the fourth partition plate 30, and the second partition plate. The above-mentioned baffle and curb plate one 21, curb plate two 22, curb plate three 24, curb plate four 25, arc 23 and bottom plate 26 divide into 5 processes with the refrigerant runner in thick liquids groove 7, do respectively: the fourth partition plate 30, the fifth partition plate 31, the sixth partition plate 32, the fourth side plate 25 and the bottom plate 26 divide a first refrigerant flow, the sixth partition plate 32, the first side plate 21, the first arc-shaped plate 23 and the fourth side plate 25 constitute a second refrigerant flow, the first side plate 21, the first partition plate 27, the fifth partition plate 31 and the bottom plate 26 constitute a third flow, the first partition plate 27, the second partition plate 28, the third partition plate 29, the second side plate 22 and the third side plate 24 constitute a fourth flow, and the second partition plate 28, the second side plate 22, the fourth arc-shaped plate 23 and the first side plate 21 constitute a fifth flow. The plates are all made of stainless steel, the thickness of the plates is 1-4mm, and the contact areas between the plates are connected in a welding and sealing mode.

As shown in fig. 5 and 6, a refrigerant inlet, a refrigerant outlet, a first slurry inlet and a second slurry inlet are formed in the bottom plate 26, the refrigerant inlet is connected with a refrigerant inlet connecting pipe 34 and is connected with a refrigerant pipeline through the refrigerant inlet connecting pipe 34, the refrigerant outlet is connected with a refrigerant outlet connecting pipe 33 and is connected with a refrigerant return pipeline through the refrigerant outlet connecting pipe 33, the first slurry inlet and the second slurry inlet are respectively connected with a first slurry inlet connecting pipe 35 and a second slurry inlet connecting pipe 36 and are connected with a slurry taking pipe through the first slurry inlet connecting pipe 35 and the second slurry inlet connecting pipe 36, and the first slurry inlet connecting pipe 35 and the second slurry inlet connecting pipe 36 extend to the upper end surface of the arc-shaped plate 23. The refrigerant flows into the tank through the refrigerant inlet connection pipe 34, and 5 flow paths are required to be folded back, and the refrigerant flows out through the refrigerant outlet connection pipe 33. A first slurry inlet connecting pipe 35 and a second slurry inlet connecting pipe 36 are arranged on the bottom plate of the trough, and the first slurry inlet connecting pipe 35 and the second slurry inlet connecting pipe 36 are directly connected to the upper end face of the arc-shaped plate so as to ensure that slurry flows into the trough pool. And the first slurry inlet connecting pipe 35 and the second slurry inlet connecting pipe 36 are welded and hermetically connected with the arc-shaped plate and the bottom plate of the trough, so that leakage between the feed liquid and the refrigerant is avoided.

The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.