A kind of suitable for fuel cell catalyst coating layer CCM batch production line system, method and platinum load online detection method

Abstract

A kind of suitable for fuel cell catalyst coating layer CCM batch production line system, method and platinum load online detection method.The proton exchange membrane unwinding system is opened to proton exchange membrane roll material;Proton exchange membrane protective film winding system is stripped and wound to the protective film of the proton exchange membrane roll material after opening;Catalyst slurry preparation system prepares the material weighed into catalyst slurry;Catalyst layer coating system is coated to the catalyst slurry prepared on proton exchange membrane roll material;Catalyst layer drying system removes volatile matter of wet mold catalyst layer by evaporation;Catalyst layer protective film unwinding system is unwound to catalyst layer protective film roll material;Catalyst coating layer CCM winding system is wound to the catalyst coating layer CCM prepared;Detection system detects the gravity and tension of proton exchange membrane unwinding system, proton exchange membrane protective film winding system, catalyst layer protective film unwinding system and catalyst coating layer CCM winding system in real time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel cell catalyst coating layer CCM, and particularly relates to a fuel cell catalyst coating layer CCM batch production line system and method and a platinum loading online detection method. BACKGROUND

[0002] The fuel cell catalyst coating layer CCM batch production line is the core of the fuel cell membrane electrode production line, the catalyst coating layer CCM product is the key to the performance of the membrane electrode, the platinum loading is the key production parameter of the membrane electrode, directly affects the performance and cost of the membrane electrode, and is the core index concerned by the membrane electrode manufacturers and stack manufacturers. At present, the catalyst coating layer CCM batch production line generally has no platinum loading detection equipment, and cannot detect the platinum loading of different regions of the catalyst coating layer CCM product. The platinum loading of the catalyst coating layer CCM product can only be detected by offline sampling, and the sample results are used to replace the platinum loading results of the catalyst coating layer CCM product, which has a large contingency, inaccurate testing, and is easy to cause defective products to flow into the subsequent process, causing losses to the membrane electrode manufacturers and stack manufacturers. At present, some catalyst coating layer CCM batch production lines consider introducing X-ray spectrometer and other equipment to detect the platinum loading of the catalyst coating layer CCM in real time during the design process, but the introduction of the equipment will greatly increase the cost of the catalyst coating layer CCM batch production line, which is not conducive to cost optimization. During the batch production of the catalyst coating layer CCM, due to the thickness difference of the proton exchange membrane roll and the fluctuation of the coating system, the thickness of the catalyst layer of the prepared CCM product is inconsistent, which causes the difference of the platinum loading of the catalyst layer. If the problem of which region of the catalyst coating layer CCM exists cannot be quickly identified, the defective products will flow into the subsequent process, which will greatly affect the performance of the products.

[0003] In summary, the existing fuel cell catalyst coating layer CCM batch production line cannot detect the platinum loading of different regions of the catalyst coating layer CCM product. SUMMARY

[0004] The present application solves the problem that the existing fuel cell catalyst coating layer CCM batch production line cannot detect the platinum loading of different regions of the catalyst coating layer CCM product.

[0005] The fuel cell catalyst coating layer CCM batch production line system comprises a proton exchange membrane unwinding system, a proton exchange membrane protective film winding system, a catalyst slurry preparation system, a catalyst layer coating system, a catalyst layer drying system, a catalyst layer protective film unwinding system, a catalyst coating layer CCM winding system, a detection system and a transmission system.

[0006] The proton exchange membrane unwinding system unwinds the proton exchange membrane roll with a base membrane and a protective membrane on both sides respectively.

[0007] The proton exchange membrane protective film winding system peels off and winds up the protective film of the unwound proton exchange membrane roll.

[0008] The catalyst slurry preparation system prepares the weighed materials into a catalyst slurry.

[0009] The catalyst layer coating system coats the prepared catalyst slurry onto the proton exchange membrane roll, thus completing the wet-molded catalyst layer preparation.

[0010] The catalyst layer drying system evaporates and removes volatile substances from the wet-molded catalyst layer, thus completing the preparation of the dry-molded catalyst layer.

[0011] The catalyst layer protective film unwinding system unwinds the catalyst layer protective film roll;

[0012] The catalyst coating CCM winding system winds up the prepared catalyst coating CCM.

[0013] The detection system monitors the gravity and tension of the proton exchange membrane unwinding system, the proton exchange membrane protective membrane winding system, the catalyst layer protective membrane unwinding system, and the catalyst coating layer CCM winding system in real time.

[0014] The transmission system is used for proton exchange membrane transport, automatic correction, and tension control.

[0015] Furthermore, in one embodiment of the present invention, the detection system includes a pressure sensor and a tension sensor;

[0016] The pressure sensor monitors the gravity of the proton exchange membrane unwinding system, the proton exchange membrane protective membrane winding system, the catalyst layer protective membrane unwinding system, and the catalyst coating layer CCM winding system in real time.

[0017] The tension sensor monitors the tension of the proton exchange membrane unwinding system, the proton exchange membrane protective membrane winding system, the catalyst layer protective membrane unwinding system, and the catalyst coating layer CCM winding system in real time.

[0018] The transmission system includes a transmission roller system and a pressure roller system;

[0019] The transfer roller system transports the proton exchange membrane to various systems within the catalyst coating CCM mass production line system;

[0020] The pressure roller system rolls the catalyst protective film and the catalyst layer together under pressure, thus completing the preparation of the catalyst coating CCM with protective film.

[0021] Further, in one embodiment of the present application, the material includes catalyst, deionized water, ionomer, organic solvent and additive.

[0022] Further, in one embodiment of the present application, the catalyst slurry preparation system prepares the weighed material into catalyst slurry by the methods of grinding, stirring, ultrasonic crushing and ultrasonic oscillation.

[0023] Further, in one embodiment of the present application, the catalyst layer coating system has the functions of continuous coating and intermittent coating of catalyst layer.

[0024] The prepared catalyst slurry is coated onto the proton exchange membrane by the feeding device and the slot coating device.

[0025] Further, in one embodiment of the present application, the volatile substances of the wet mold catalyst layer include water and organic solvent.

[0026] Further, in one embodiment of the present application, the catalyst layer drying system is a tunnel drying oven.

[0027] Further, in one embodiment of the present application, the prepared catalyst coating layer CCM is a catalyst coating layer CCM with base film, proton exchange membrane, catalyst layer and catalyst layer protective film.

[0028] The method for batch production line of catalyst coating layer CCM for fuel cell according to the present application is realized by using the system for batch production line of catalyst coating layer CCM for fuel cell according to the present application, and the method comprises the following steps:

[0029] Step S1, the proton exchange membrane unwinding system unwinds the proton exchange membrane roll material with base film and protective film on both sides, and uses pressure sensor and tension sensor to respectively monitor the gravity and tension of the proton exchange membrane unwinding system in real time.

[0030] Step S2, the proton exchange membrane protective film winding system peels off and winds the protective film of the unwound proton exchange membrane roll material, and uses pressure sensor and tension sensor to respectively monitor the gravity and tension of the proton exchange membrane protective film winding system in real time.

[0031] Step S3, while the peeled and wound proton exchange membrane roll material is transmitted to the catalyst layer coating system through the transmission system, the catalyst slurry preparation system prepares the weighed material into catalyst slurry.

[0032] Step S4, the catalyst layer coating system coats the prepared catalyst slurry onto the proton exchange membrane roll material, and completes the preparation of wet mold catalyst layer.

[0033] Step S5, the catalytic layer drying system evaporates and removes the volatile substances of the wet mold catalytic layer, and the preparation of the dry mold catalytic layer is completed;

[0034] Step S6, the catalytic layer protective film unwinding system unwinds the protective film roll material of the dry mold catalytic layer obtained in step S5, and the pressure sensor and the tension sensor are used to respectively monitor the gravity and tension of the catalytic layer protective film unwinding system in real time;

[0035] Step S7, the catalytic layer protective film and the catalytic layer are rolled and compounded under the pressure of the pressure roller, and the preparation of the catalytic coating layer CCM with a protective film is completed;

[0036] Step S8, the catalytic coating layer CCM winding system winds the prepared catalytic coating layer CCM with a protective film, and the preparation of the catalytic coating layer CCM is completed, and the pressure sensor and the tension sensor are used to respectively monitor the gravity and tension of the catalytic coating layer CCM winding system in real time.

[0037] The platinum load online detection method suitable for the fuel cell catalyst coating layer CCM batch production line is realized by using the above-mentioned method, and specifically comprises the following steps:

[0038] The weight change of the proton exchange membrane roll material in the dt time period is monitored by the pressure sensor to obtain the pressure G1 and the tension F1 of the proton exchange membrane unwinding system, so that the gravity N1 of the proton exchange membrane roll material and the support is calculated as:

[0039] N1(t)=G1(t)+F1(t)cosθ1(t),

[0040] Then the weight change of the proton exchange membrane roll material in the dt time period is:

[0041] dm1(t)=|dN1(t) / g|=|d(G1(t)+F1(t)cosθ1(t)) / g|;

[0042] The weight change of the proton exchange membrane protective film roll material in the dt time period is monitored by the pressure sensor to obtain the pressure G2 and the tension F2 of the proton exchange membrane protective film winding system, so that the gravity N2 of the proton exchange membrane protective film and the support is calculated as:

[0043] N2(t)=G2(t)-F2(t)cosθ2(t)),

[0044] Then the weight change of the proton exchange membrane protective film roll material in the dt time period is:

[0045] dm2(t)=dN2(t) / g=d(G2(t)-F2(t)cosθ2(t)) / g;

[0046] The weight change of the catalytic layer protective film roll in the time period dt is calculated by monitoring the pressure G3 and the tension F3 of the catalytic layer protective film unwinding system through the pressure sensor, so as to calculate the gravity N3 of the catalytic layer protective film and the support:

[0047] N3(t) = G3(t) - F3(t)cosθ3(t),

[0048] The weight change of the catalytic layer protective film roll in the time period dt is calculated by monitoring the pressure G3 and the tension F3 of the catalytic layer protective film unwinding system through the pressure sensor, so as to calculate the gravity N3 of the catalytic layer protective film and the support:

[0049] dm3(t) = |dN3(t) / g| = |d(G3(t) - F3(t)cosθ3(t)) / g|;

[0050] The weight change of the catalytic layer protective film roll in the time period dt is calculated by monitoring the pressure G3 and the tension F3 of the catalytic layer protective film unwinding system through the pressure sensor, so as to calculate the gravity N3 of the catalytic layer protective film and the support:

[0051] N4(t) = G4(t) - F4(t)cosθ4(t),

[0052] The weight change of the catalytic layer protective film roll in the time period dt is calculated by monitoring the pressure G3 and the tension F3 of the catalytic layer protective film unwinding system through the pressure sensor, so as to calculate the gravity N3 of the catalytic layer protective film and the support:

[0053] dm4(t) = dN4(t) / g = d(G4(t) - F4(t)cosθ4(t)) / g;

[0054] The weight change of the catalytic layer protective film roll in the time period dt is calculated by monitoring the pressure G3 and the tension F3 of the catalytic layer protective film unwinding system through the pressure sensor, so as to calculate the gravity N3 of the catalytic layer protective film and the support:

[0055] dm c (t) = dm4(t) - dm3(t-t3) - (dm1(t-t1) - dm2(t-t2)),

[0056] wherein t1 = l AE / V, t2 = (l BE -l BC ) / V, t3 = l DE / V,

[0057] dm c (t) = dm4(t) - dm3(t-l DE / V) - (dm1(t-l AE / V) - dm2(t-(l BE -l BC ) / V)),

[0058] dm c (t) = d(G4(t) - F4(t)cosθ4(t)) / g - |d(G3(t-l DE / V) - F3(t - l) DE / V) cos θ3(t - l) DE / V)) / g| - d(G1(t - l AE / V) + F1(t - l AE / V) cos θ1(t - l AE / V)) / g| - d(G2(t - l BE -l BC ) / V) - F2(t - l BE -l BC ) / V) cos θ2(t - l BE -l BC ) / V)) / g;

[0059] The catalyst coating layer CCM winding system at time t has a catalyst layer weight at the tangent point of:

[0060] When dt→0, dm c (t) is the catalyst layer weight at time t at the tangent point;

[0061] The platinum loading at the tangent point of the catalyst coating layer CCM winding system at time t is m Pt = dm c (t) (dt→0) × λ1, wherein λ1 is the ratio of platinum metal to the dry catalyst layer weight.

[0062] The present application solves the problem that the existing fuel cell catalyst coating layer CCM mass production line cannot detect the platinum loading of different areas of the catalyst coating layer CCM product. Specific beneficial effects include:

[0063] 1. The catalyst coating layer CCM mass production line system for fuel cells, the pressure sensor and the tension sensor detect the platinum loading of different areas of the catalyst coating layer CCM product in real time, and determine whether the platinum loading meets the design requirements. The introduction of the platinum loading test system can greatly improve the product quality of the catalyst coating layer CCM, effectively prevent unqualified products from flowing into the subsequent process, and ensure real-time monitoring of the product state of the entire production line.

[0064] 2. The catalyst coating layer CCM mass production line system for fuel cells, the platinum loading test system has a simple structure, is easy to implement, has low cost, and has an online detection function. DETAILED DESCRIPTION

[0065] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings, in which:

[0066] Figure 1is a schematic diagram of a catalyst coating layer CCM mass production line described in the detailed description.

[0067] Figure 2 is a schematic diagram of a catalyst coating layer CCM preparation process described in the detailed description. DETAILED DESCRIPTION

[0068] Various embodiments of the present application will be described herein below with reference to the accompanying drawings. The embodiments described by reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0069] The embodiment described herein is a catalyst coating layer CCM mass production line system suitable for fuel cell catalyst coating layer CCM, which comprises a proton exchange membrane unwinding system, a proton exchange membrane protective film winding system, a catalyst slurry preparation system, a catalyst layer coating system, a catalyst layer drying system, a catalyst layer protective film unwinding system, a catalyst coating layer CCM winding system, a detection system and a transmission system.

[0070] The proton exchange membrane unwinding system unwinds the proton exchange membrane roll material with base film and protective film on both sides.

[0071] The proton exchange membrane protective film winding system peels off and winds the protective film of the unwound proton exchange membrane roll material.

[0072] The catalyst slurry preparation system prepares the weighed materials into catalyst slurry.

[0073] The catalyst layer coating system coats the prepared catalyst slurry onto the proton exchange membrane roll material to complete the preparation of the wet mold catalyst layer.

[0074] The catalyst layer drying system evaporates and removes the volatile substances of the wet mold catalyst layer to complete the preparation of the dry mold catalyst layer.

[0075] The catalyst layer protective film unwinding system unwinds the catalyst layer protective film roll material.

[0076] The catalyst coating layer CCM winding system winds the prepared catalyst coating layer CCM.

[0077] The detection system detects the gravity and tension of the proton exchange membrane unwinding system, the proton exchange membrane protective film winding system, the catalyst layer protective film unwinding system and the catalyst coating layer CCM winding system in real time.

[0078] The transmission system is used for proton exchange membrane transmission, automatic deviation correction and tension control.

[0079] In the embodiment, the detection system comprises a pressure sensor and a tension sensor.

[0080] The pressure sensor monitors the gravity of the proton exchange membrane unwinding system, the proton exchange membrane protective film winding system, the catalyst layer protective film unwinding system and the catalyst coated membrane CCM winding system in real time;

[0081] The tension sensor monitors the tension of the proton exchange membrane unwinding system, the proton exchange membrane protective film winding system, the catalyst layer protective film unwinding system and the catalyst coated membrane CCM winding system in real time;

[0082] The transmission system includes a transmission roller system and a pressure roller system;

[0083] The transmission roller system transmits the proton exchange membrane to each system of the catalyst coated membrane CCM mass production line system;

[0084] The pressure roller system rolls and composites the catalyst layer protective film and the catalyst layer under pressure to complete the preparation of the catalyst coated membrane CCM with protective film.

[0085] In this embodiment, the materials include catalyst, deionized water, ionomer, organic solvent and additives.

[0086] In this embodiment, the catalyst slurry preparation system prepares the weighed materials into catalyst slurry by the methods of grinding, stirring, ultrasonic crushing and ultrasonic oscillation.

[0087] In this embodiment, the catalyst layer coating system has the functions of continuous coating and intermittent coating of the catalyst layer.

[0088] The prepared catalyst slurry is coated on the proton exchange membrane by the feeding equipment and the slot coating equipment.

[0089] In this embodiment, the volatile substances of the wet mold catalyst layer include water and organic solvent.

[0090] In this embodiment, the catalyst layer drying system is a tunnel type drying oven.

[0091] In this embodiment, the prepared catalyst coated membrane CCM is a catalyst coated membrane CCM with base film, proton exchange membrane, catalyst layer and catalyst layer protective film.

[0092] The method is realized by using the above-mentioned embodiment of the catalyst coated membrane CCM mass production line system suitable for fuel cell, and the method includes the following steps:

[0093] Step S1, the proton exchange membrane unwinding system unwinds the proton exchange membrane roll material with base film and protective film on both sides, and uses a pressure sensor and a tension sensor to respectively monitor the gravity and tension of the proton exchange membrane unwinding system in real time;

[0094] Step S2, the proton exchange membrane protective film winding system peels off and winds the protective film of the unwound proton exchange membrane roll material, and uses a pressure sensor and a tension sensor to respectively monitor the gravity and tension of the proton exchange membrane protective film winding system in real time,

[0095] Step S3, while the peeled and wound proton exchange membrane roll material is transmitted to the catalyst layer coating system through the transmission system, the catalyst slurry preparation system prepares the weighed materials into catalyst slurry;

[0096] Step S4, the catalyst layer coating system coats the prepared catalyst slurry on the proton exchange membrane roll material to complete the preparation of the wet mold catalyst layer;

[0097] Step S5, the catalyst layer drying system evaporates and removes the volatile substances of the wet mold catalyst layer to complete the preparation of the dry mold catalyst layer;

[0098] Step S6, the catalyst layer protective film unwinding system unwinds the protective film roll material of the dry mold catalyst layer obtained in step S5, and uses a pressure sensor and a tension sensor to respectively monitor the gravity and tension of the catalyst layer protective film unwinding system in real time;

[0099] Step S7, the catalyst layer protective film and the catalyst layer are roll-bonded under the pressure of the pressure roller to complete the preparation of the catalyst coating layer CCM with protective film;

[0100] Step S8, the catalyst coating layer CCM winding system winds the prepared catalyst coating layer CCM with protective film to complete the preparation of the catalyst coating layer CCM, and simultaneously uses a pressure sensor and a tension sensor to respectively monitor the gravity and tension of the catalyst coating layer CCM winding system in real time.

[0101] A platinum loading online detection method suitable for a fuel cell catalyst coating layer CCM batch production line according to the embodiment, the method is realized by using the fuel cell catalyst coating layer CCM batch production line system according to the above embodiment, and specifically:

[0102] The weight change of the proton exchange membrane roll material in the time period dt is calculated by monitoring the pressure G1 and the tension F1 of the proton exchange membrane unwinding system through the pressure sensor, so that the gravity N1 of the proton exchange membrane roll material and the support is calculated as:

[0103] N1(t)=G1(t)+F1(t)cosθ1(t),

[0104] The weight change of the proton exchange membrane roll in the time period dt is:

[0105] dm1(t) = |dN1(t) / g| = |d(G1(t) + F1(t)cosθ1(t)) / g|; and

[0106] The weight change of the proton exchange membrane protective film roll in the time period dt is calculated by monitoring the pressure G2 and the tension F2 of the proton exchange membrane protective film unwinding system through the pressure sensor, so as to calculate the gravity N2 of the proton exchange membrane protective film and the support:

[0107] N2(t) = G2(t) - F2(t)cosθ2(t),

[0108] The weight change of the proton exchange membrane protective film roll in the time period dt is:

[0109] dm2(t) = dN2(t) / g = d(G2(t) - F2(t)cosθ2(t)) / g;

[0110] The weight change of the catalyst layer protective film roll in the time period dt is calculated by monitoring the pressure G3 and the roll tension F3 of the catalyst layer protective film unwinding system through the pressure sensor, so as to calculate the gravity N3 of the catalyst layer protective film and the support:

[0111] N3(t) = G3(t) - F3(t)cosθ3(t),

[0112] The weight change of the catalyst layer protective film roll in the time period dt is:

[0113] dm3(t) = |dN3(t) / g| = |d(G3(t) - F3(t)cosθ3(t)) / g|; and

[0114] The weight change of the catalyst coating layer CCM roll in the time period dt is calculated by monitoring the pressure G4 and the tension F4 of the catalyst coating layer CCM winding system through the pressure sensor, so as to calculate the gravity N4 of the catalyst coating layer CCM roll and the support:

[0115] N4(t) = G4(t) - F4(t)cosθ4(t),

[0116] The weight change of the catalyst coating layer CCM roll in the time period dt is:

[0117] dm4(t) = dN4(t) / g = d(G4(t) - F4(t)cosθ4(t)) / g;

[0118] The weight change of the catalyst layer in the time period dt is:

[0119] dm c(t) = dm4(t) - dm3(t - t3) - (dm1(t - t1) - dm2(t - t2)),

[0120] wherein t1 = l AE / V, t2 = (l BE -l BC ) / V, t3 = l DE / V,

[0121] then dm c (t) = dm4(t) - dm3(t - l DE / V) - (dm1(t - l AE / V) - dm2(t - (l BE -l BC ) / V)),

[0122] dm c (t) = d(G4(t) - F4(t)cosθ4(t)) / g - |d(G3(t - l DE / V) - F3(t - l DE / V)cosθ3(t - l DE / V)) / g - (|d(G1(t - l AE / V) + F1(t - l AE / V)cosθ1(t - l AE / V)) / g - d(G2(t - (l BE -l BC ) / V) - F2(t - (l BE -l BC ) / V)cosθ2(t - (l BE -l BC ) / V)) / g;

[0123] The weight of the catalyst coated layer CCM at the tangent point at time t is:

[0124] When dt→0, dm c (t) is the weight of the catalyst layer at the tangent point at time t;

[0125] The platinum loading at the tangent point of the catalyst coated layer CCM at time t is m Pt = dm c (t) (dt→0) x λ1, wherein λ1 is the ratio of platinum metal to the weight of the dry catalyst layer.

[0126] The present embodiment is based on a kind of for the fuel cell catalyst coated layer CCM batch production line system described in the application, provide a kind of practical implementation:

[0127] The catalyst coating layer CCM mass production line comprises a catalyst slurry preparation system, a catalyst slurry solid content online detection system, a proton exchange membrane unwinding system, a proton exchange membrane protective film winding system, a transmission system, a catalyst layer coating system, a catalyst layer drying system, a catalyst layer protective film unwinding system, a catalyst coating layer CCM winding system and a tension monitoring system.

[0128] 1) Catalyst slurry preparation system

[0129] The catalyst slurry preparation system is to prepare the catalyst slurry by grinding, stirring, ultrasonic crushing, ultrasonic oscillation and other methods through the weighed catalyst, deionized water, organic solvent, ionomer solution, additives and other materials.

[0130] 2) Proton exchange membrane unwinding system

[0131] The proton exchange membrane unwinding system is to stably unwind the proton exchange membrane roll material with support film and protective film on both sides, and can monitor the gravity and tension of the unwinding system in real time.

[0132] 3) Proton exchange membrane protective film winding system

[0133] The proton exchange membrane protective film winding system is to peel off and wind the protective film of the unwound proton exchange membrane roll material, and can monitor the gravity and tension of the protective film peeling and winding system in real time.

[0134] 4) Transmission system

[0135] The transmission system is mainly used for proton exchange membrane transmission, automatic deviation correction, tension control and the like, and stably transmits the proton exchange membrane to each station of the catalyst coating layer CCM production line to ensure continuous production of the catalyst coating layer CCM.

[0136] 5) Catalyst layer coating system

[0137] The catalyst layer coating system is to coat the prepared catalyst slurry on the proton exchange membrane through the feeding equipment and the slot coating equipment, and the coating system has the functions of continuous coating and intermittent coating of the catalyst layer.

[0138] 6) Catalyst layer drying system

[0139] The catalyst layer drying system is to evaporate and remove the volatile materials such as deionized water and organic solvent inside the coated catalyst layer to complete the preparation of the catalyst layer, and the drying equipment is a tunnel type drying box.

[0140] 7) Catalyst layer protective film unwinding system

[0141] The catalyst layer protective film unwinding system is to unwind the catalyst layer protective film (PI, PET and other material films) roll material, and can monitor the gravity and tension of the protective film unwinding system in real time.

[0142] 8) Catalyst coating layer CCM winding system

[0143] The catalyst coating layer CCM winding system winds the prepared catalyst coating layer CCM, and can monitor the gravity and tension of the catalyst coating layer CCM winding system in real time.

[0144] The embodiment is based on a method suitable for mass production of catalyst coating layer CCM for fuel cell catalyst coating layer, which combines Figure 1 To better understand the embodiment, an actual embodiment is provided:

[0145] Catalyst coating layer CCM mass production process:

[0146] 1) Proton exchange membrane unwinding

[0147] The proton exchange membrane winding system unwinds the proton exchange membrane roll with base film and protective film on both sides, and uses pressure sensors and tension sensors to monitor the gravity G1 and tension F1 of the unwinding system in real time.

[0148] 2) Proton exchange membrane protective film stripping and winding

[0149] The proton exchange membrane protective film winding system strips and winds the protective film of the proton exchange membrane, and uses pressure sensors and tension sensors to monitor the gravity G2 and tension F2 of the protective film stripping and winding system in real time.

[0150] 3) Catalyst slurry preparation

[0151] The catalyst slurry preparation system prepares catalyst, deionized water, ionomer, organic solvent, additives and other materials into catalyst slurry.

[0152] 4) Catalyst layer coating

[0153] The coating system directly coats the catalyst slurry onto the proton exchange membrane to complete the preparation of the wet mold catalyst layer.

[0154] 5) Catalyst layer drying

[0155] The catalyst layer drying system dries the wet mold catalyst layer to remove water, organic solvent and other volatile substances in the catalyst layer, and completes the preparation of the dry mold catalyst layer.

[0156] 6) Catalyst layer protective film unwinding

[0157] The catalyst layer protective film unwinding system unwinds the catalyst layer protective film, and uses pressure sensors and tension sensors to monitor the gravity G3 and tension F3 of the protective film unwinding system in real time.

[0158] 7) Catalyst layer protective film compounding

[0159] The catalytic layer protection film and the catalytic layer are rolled and combined under suitable pressure by using a composite roller to complete the preparation of the catalyst coating layer CCM with a protection film.

[0160] 8) Catalyst coating layer winding

[0161] The CCM with the base film, the proton exchange membrane, the catalytic layer and the catalytic layer protection film is wound by using the catalyst coating layer CCM winding system, and the gravity G4 and the tension F4 of the catalyst coating layer CCM winding system are monitored in real time by using the pressure sensor and the tension sensor.

[0162] 9) Preparation of cathode and anode catalytic layers

[0163] The preparation of the cathode catalytic layer and the anode catalytic layer is completed by the above process, and the final preparation of the catalyst coating layer CCM product is completed, and the platinum loadings of the cathode catalytic layer and the anode catalytic layer in different areas are monitored in real time.

[0164] The present embodiment is based on a method suitable for mass production of fuel cell catalyst coating layer CCM according to the present application, which combines Figure 2 In order to better understand the present embodiment, an actual embodiment is provided:

[0165] The running speed of the production line at time t is set to V m / s, the movement speed of all the roll materials on the production line is Vm / s, and the angle between the roll material and the vertical direction at time t is θ(t).

[0166] 1) Change in weight of proton exchange membrane roll material in dt period

[0167] The gravity N1 of the proton exchange membrane roll material and the support is calculated by the pressure G1 measured by the pressure sensor and the roll tension F1:

[0168] N1(t) = G1(t) + F1(t)cosθ1(t);

[0169] Change in weight of proton exchange membrane roll material in dt period:

[0170] dm1(t) = |dN1(t) / g| = |d(G1(t) + F1(t)cosθ1(t)) / g|.

[0171] 2) Change in weight of proton exchange membrane protection film roll material in dt period

[0172] The gravity N2 of the proton exchange membrane protection film and the support is calculated by the pressure G2 measured by the pressure sensor and the roll tension F2:

[0173] N2(t) = G2(t) - F2(t)cosθ2(t));

[0174] dt time period proton exchange membrane protective film roll weight change:

[0175] dm2(t) = dN2(t) / g = d(G2(t) - F2(t)cosθ2(t)) / g.

[0176] 3) dt time period catalytic layer protective film roll weight change

[0177] The pressure G3 and the roll tension F3 measured by the pressure sensor calculate the gravity N3 of the catalytic layer protective film and the support:

[0178] N3(t) = G3(t) - F3(t)cosθ3(t));

[0179] dt time period catalytic layer protective film roll weight change:

[0180] dm3(t) = |dN3(t) / g| = |d(G3(t) - F3(t)cosθ3(t)) / g|.

[0181] 4) dt time period catalyst coated layer CCM roll weight change

[0182] The pressure G4 and the roll tension F4 measured by the pressure sensor calculate the gravity N4 of the catalyst coated layer CCM roll and the support:

[0183] N4(t) = G4(t) - F4(t)cosθ4(t));

[0184] dt time period catalyst coated layer CCM roll weight change:

[0185] dm4(t) = dN4(t) / g = d(G4(t) - F4(t)cosθ4(t)) / g.

[0186] 5) dt time period catalytic layer weight change

[0187] dm c (t) = dm4(t) - dm3(t-t3) - (dm1(t-t1) - dm2(t-t2));

[0188] Wherein, t1 = l AE / V, t2 = (l BE -l BC ) / V, t3 = l DE / V;

[0189] dm c (t) = dm4(t) - dm3(t-l DE / V) - (dm1(t-l AE / V) - dm2(t-(l BE-l BC ) / V));

[0190] dm c (t) = d(G4(t) - F4(t) cos θ4(t)) / g - |d(G3(t - 1 DE / V) - F3(t - 1 DE / V) cos θ3(t - 1 DE / V)) / g - |d(G1(t - 1 AE / V) + F1(t - 1 AE / V) cos θ1(t - 1 AE / V)) / g - d(G2(t - (1 BE -l BC ) / V) - F2(t - (1 BE -l BC ) / V) cos θ2(t - (1 BE -l BC ) / V)) / g.

[0191] 6) Catalyst coated layer CCM at point E at time t

[0192] When dt→0, dm c (t) is the catalyst layer weight at point E at time t.

[0193] 7) Platinum loading test at point E of catalyst coated layer CCM at time t

[0194] After the wet film catalyst layer prepared by the coating system is dried by the drying system, all volatile substances such as organic solvents and deionized water are removed, and according to the slurry formula design, the ratio of Pt metal to dry film catalyst layer weight can be calculated as λ1.

[0195] Therefore, the platinum loading at point E of the catalyst coated layer CCM at time t in the winding system can be calculated as:

[0196] m Pt = dm c (t) (dt→0) × λ1.

[0197] The above describes in detail a fuel cell catalyst coated layer CCM batch production line system, method and platinum loading online detection method. The principles and implementation manners of the present application are described by using specific examples. The above examples are only used to help understand the method and core idea of the present application. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges can be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A method for on-line detection of platinum loading suitable for fuel cell catalyst coated membrane (CCM) mass production line, said method is implemented by a system suitable for fuel cell catalyst coated membrane (CCM) mass production line, characterized in that, The batch production line system comprises a proton exchange membrane unwinding system, a proton exchange membrane protective film winding system, a catalyst slurry preparation system, a catalyst layer coating system, a catalyst layer drying system, a catalyst layer protective film unwinding system, a catalyst coating layer CCM winding system, a detection system and a transmission system; The proton exchange membrane unwinding system unwinds the proton exchange membrane roll material with base film and protective film on both sides; The proton exchange membrane protective film winding system peels and winds the protective film of the unwound proton exchange membrane roll material; The catalyst slurry preparation system prepares the weighed materials into catalyst slurry; The catalyst layer coating system coats the prepared catalyst slurry on the proton exchange membrane roll material to complete the preparation of the wet mold catalyst layer; The catalyst layer drying system evaporates and removes the volatile substances of the wet mold catalyst layer to complete the preparation of the dry mold catalyst layer; The catalyst layer protective film unwinding system unwinds the catalyst layer protective film roll material; The catalyst coating layer CCM winding system winds the prepared catalyst coating layer CCM; The detection system detects the gravity and tension of the proton exchange membrane unwinding system, the proton exchange membrane protective film winding system, the catalyst layer protective film unwinding system and the catalyst coating layer CCM winding system in real time; The transmission system is used for proton exchange membrane transmission, automatic deviation correction and tension control; Specifically: The weight change of the proton exchange membrane roll material in the dt time period is calculated by monitoring the pressure G1 and the tension F1 of the proton exchange membrane unwinding system through the pressure sensor, so that the gravity N1 of the proton exchange membrane roll material and the support is calculated as: N1(t)=G1(t)+F1(t)cosθ1(t), The weight change of the proton exchange membrane roll material in the dt time period is calculated by monitoring the pressure G1 and the tension F1 of the proton exchange membrane unwinding system through the pressure sensor, so that the gravity N1 of the proton exchange membrane roll material and the support is calculated as: N1(t)=G1(t)+F1(t)cosθ1(t), The weight change of the proton exchange membrane roll material in the dt time period is calculated by monitoring the pressure G1 and the tension F1 of the proton exchange membrane unwinding system through the pressure sensor, so that the gravity N1 of the proton exchange membrane roll material and the support is calculated as: N1(t)=G1(t)+F1(t)cosθ1(t), The weight change of the proton exchange membrane roll material in the dt time period is calculated by monitoring the pressure G1 and the tension F1 of the proton exchange membrane unwinding system through the pressure sensor, so that the gravity N1 of the proton exchange membrane roll material and the support is calculated as: N1(t)=G1(t)+F1(t)cosθ1(t), The weight change of the proton exchange membrane roll material in the dt time period is calculated by monitoring the pressure G1 and the tension F1 of the proton exchange membrane unwinding system through the pressure sensor, so that the gravity N1 of the proton exchange membrane roll material and the support is calculated as: N1(t)=G1(t)+F1(t)cosθ1(t), The weight change of the proton exchange membrane roll material in the dt time period is calculated by monitoring the pressure G1 and the tension F1 of the proton exchange membrane unwinding system through the pressure sensor, so that the gravity N1 of the proton exchange membrane roll material and the support is calculated as: N1(t)=G1(t)+F1(t)cosθ1(t), ​ N4(t)=G4(t)-F4(t)cosθ4(t)), The weight change of the catalyst coating layer CCM roll stock in the dt time period is: dm4(t)=dN4(t) / g=d(G4(t)-F4(t)cosθ4(t)) / g; The weight change of the catalyst layer in the dt time period is: dm c (t) = dm4(t) - dm3(t - t3) - (dm1(t - ti) - dm2(t - t2)), wherein, t1 = l AE / V, t2 = (l BE -l BC ) / V, t3 = l DE / V, then dm c (t) = dm4(t) - dm3(t - 1 DE (t) = dm4(t) - dm3(t - 1 AE (t) = dm4(t) - dm3(t - 1 BE -l BC ) / V)) dm c (t)=d(G4(t)-F4(t)cosθ4(t)) / g-|d(G3(t-l DE / V)-F3(t-l DE / V)cosθ3(t-l DE / V)) / g|-(|d(G1(t-l AE / V)+F1(t-l AE / V)cosθ1(t-l AE / V)) / g|-d(G2(t-(l BE -l BC ) / V)-F2(t-(l BE -l BC ) / V)cosθ2(t-(l BE -l BC ) / V)) / g; The weight of the catalyst coating layer CCM at the cutting point in the t time is: When dt→ 0, dm c (t) is the weight of the catalytic layer at time t at the point of tangency; Pt loading at the cut point of the catalyst coated layer CCM winding system at time t is m Pt = dm c (t) (dt→0) x λ1, where λ1is the ratio of platinum metal to dry film catalyst layer weight.

2. A method for on-line detection of platinum loading for a fuel cell catalyst coated membrane (CCM) mass production line according to claim 1, characterized in that, The detection system comprises a pressure sensor and a tension sensor; The pressure sensor is used to monitor the weight of the proton exchange membrane unwinding system, the proton exchange membrane protective film winding system, the catalyst layer protective film unwinding system and the catalyst coating layer CCM winding system in real time; The tension sensor is used to monitor the tension of the proton exchange membrane unwinding system, the proton exchange membrane protective film winding system, the catalyst layer protective film unwinding system and the catalyst coating layer CCM winding system in real time; The transmission system comprises a transmission roller system and a compression roller system; The transmission roller system transmits the proton exchange membrane to each system of the catalyst coating layer CCM mass production line system; The compression roller system rolls and composites the catalyst layer protective film and the catalyst layer under pressure to complete the preparation of the catalyst coating layer CCM with protective film.

3. A method for on-line detection of platinum loading for a fuel cell catalyst coated membrane (CCM) mass production line according to claim 1, wherein, The materials comprise a catalyst, deionized water, an ionomer, an organic solvent and an additive.

4. A method for on-line detection of platinum loading for a fuel cell catalyst coated membrane (CCM) mass production line according to claim 1, wherein, The catalyst slurry preparation system prepares the weighed materials into catalyst slurry by means of grinding, stirring, ultrasonic crushing and ultrasonic oscillation.

5. A method for on-line detection of platinum loading for a fuel cell catalyst coated membrane (CCM) mass production line according to claim 1, wherein, The catalyst layer coating system has the functions of continuous coating and intermittent coating of the catalyst layer. The prepared catalyst slurry is coated on the proton exchange membrane by means of the feeding device and the slot coating device.

6. A method for on-line detection of platinum loading for a fuel cell catalyst coated membrane (CCM) mass production line according to claim 1, wherein, The volatile substances of the wet mold catalyst layer comprise water and an organic solvent.

7. A method for on-line detection of platinum loading for a fuel cell catalyst coated membrane (CCM) mass production line according to claim 1, wherein, The catalyst layer drying system is a tunnel type drying box.

8. A method for on-line detection of platinum loading for a fuel cell catalyst coated membrane (CCM) mass production line according to claim 1, wherein, The prepared catalyst coating layer CCM is a catalyst coating layer CCM with a base film, a proton exchange membrane, a catalyst layer and a catalyst layer protective film.

9. A method suitable for fuel cell catalyst coated membrane (CCM) mass production line, characterized by, The method is realized by using the platinum load online detection method suitable for the catalyst coating layer CCM mass production line of the fuel cell, and comprises the following steps: In step S1, the proton exchange membrane unwinding system unwinds the proton exchange membrane roll stock with the base film and the protective film on both sides, and the pressure sensor and the tension sensor are used to monitor the weight and tension of the proton exchange membrane unwinding system in real time respectively; In step S2, the proton exchange membrane protective film winding system peels off and winds the protective film of the unwound proton exchange membrane roll stock, and the pressure sensor and the tension sensor are used to monitor the weight and tension of the proton exchange membrane protective film winding system in real time respectively, In step S3, the peeled and wound proton exchange membrane roll stock is transmitted to the catalyst layer coating system by the transmission system, and the catalyst slurry preparation system prepares the weighed materials into catalyst slurry; In step S4, the catalyst layer coating system coats the prepared catalyst slurry on the proton exchange membrane roll stock to complete the preparation of the wet mold catalyst layer; In step S5, the catalyst layer drying system evaporates and removes the volatile substances of the wet mold catalyst layer to complete the preparation of the dry mold catalyst layer; Step S6, the catalytic layer protection film unwinding system unwinds the dry mold catalytic layer protection film roll obtained in step S5, and uses a pressure sensor and a tension sensor to respectively monitor the gravity and tension of the catalytic layer protection film unwinding system in real time; Step S7, the catalytic layer protection film and the catalytic layer are roll-combined under the pressure of the pressure roller, and the preparation of the catalytic coating layer CCM with a protection film is completed; Step S8, the catalytic coating layer CCM winding system winds the prepared catalytic coating layer CCM with a protection film, and the preparation of the catalytic coating layer CCM is completed, while a pressure sensor and a tension sensor are used to respectively monitor the gravity and tension of the catalytic coating layer CCM winding system in real time.

Images