CN115064744B - Self-adsorption bearing film, and fuel cell MEA film electrode continuous preparation device and method - Google Patents
Self-adsorption bearing film, and fuel cell MEA film electrode continuous preparation device and method Download PDFInfo
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
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- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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Abstract
The invention discloses a self-absorption bearing film, which outputs a high-voltage electric field through an electrostatic loading device; according to the preparation process, the voltage, the current intensity and the output polarity are adjusted, wherein the voltage adjustment range is 20 KV-50 KV, the current adjustment intensity is 500 mA-1000 mA, and the output polarity is an anode or a cathode; functional areas with the width of 10mm-30mm are arranged on two sides of the self-absorption bearing film and used for printing visual production information codes.
Description
Technical Field
The invention belongs to the technical field of hydrogen energy fuel cells (Proton exchange membrane fuel cell-PEMFC), and particularly relates to a high-standard automatic manufacturing process technology and device for manufacturing a key component of a fuel cell, namely a membrane electrode.
Background
The fuel cell technology is a multidisciplinary cross comprehensive technology, is a device for converting chemical energy into electric energy through oxyhydrogen chemical reaction, can continuously provide electric energy as long as hydrogen fuel is continuously supplied, can realize pollution-free and zero-emission, and is globally recognized as a future new energy solution. The major developed countries in the world now pay attention to the development and application of fuel cell technology, especially some countries such as developed countries in europe and america and japan, and through technological development and accumulation for many years, the fuel cell has been in the leading position in various aspects such as core material technology, fuel cell production technology, related equipment technology, application technology in various application scenarios, etc., and the fuel cell has been primarily commercialized in many subdivision fields.
The membrane electrode is a key core component in the fuel cell, and the manufacturing technology of the membrane electrode also relates to the fields of mechanical engineering, material engineering, automatic control system engineering and the like. The performance of the membrane electrode is determined by means of a proton exchange membrane, a catalyst and a manufacturing process, and the performance (chemical energy conversion electric energy) of the membrane electrode is the basis in various performance indexes of the fuel cell, so that the process technology and the automatic equipment for manufacturing the membrane electrode become excellent opportunities for realizing crossing breakthrough in the key field of the fuel cell industry of China, and are one of the growing spaces for enabling the fuel cell industry of China to get rid of a few independent innovations of foreign technical barriers.
The China starts later in the field, and is difficult to realize surpassing in the field of core materials, such as proton exchange membranes, catalysts, polar flow plates and the like, and the cost advantage is difficult to establish even if huge materials are consumed to obtain the breakthrough of the material technology.
As shown in fig. 1, a common CCM membrane electrode is schematically shown, and is formed by an electrode layer (anode)/a proton exchange membrane/an electrode layer (cathode), wherein the proton exchange membrane is a core material of the CCM membrane electrode, is located at a central position in the structure of the CCM membrane electrode, and penetrates through the whole process of manufacturing the CCM membrane electrode.
As shown in fig. 2, a schematic diagram of a common MEA membrane electrode is shown, which is formed by a "gas seal layer/gas diffusion layer/CCM membrane electrode/gas diffusion layer/gas seal layer", wherein the CCM membrane electrode is located at a central position in the structure of the MEA membrane electrode, and the MEA membrane electrode unit obtained by further processing the continuous CCM membrane electrode can be used for stacking application of a fuel cell power stack, and the performance consistency and stability thereof directly determine the performance quality of the fuel cell power stack. Commercial gas diffusion layers and gas seal layers (seal frames) have been employed on a large scale in current MEA membrane electrode processing to meet the design requirements of different pole flow plate configurations and fuel cell power stacks.
The proton exchange membrane mainly used in the field of fuel cells at present is represented by a perfluorinated sulfonic acid membrane, has good hydrogen ion conduction capacity, stable chemical performance and low gas permeability, and has certain mechanical strength. With the continuous iteration of the fuel cell technology, the thickness of the proton exchange membrane tends to be thinner to obtain better electrochemical performance, and correspondingly, the mechanical strength is further reduced, which puts higher demands on the CCM membrane electrode preparation process and equipment. For example, a common proton exchange membrane is a rolled material comprising a layer of bottom membrane, if the electrode layer is coated on the rolled proton exchange membrane directly, the electrode layer coating with specific geometric parameters is very difficult due to the large-scale swelling deformation generally occurring after the proton exchange membrane absorbs the solvent, and the subsequent operation processing such as pressing a gas diffusion layer, attaching a gas sealing layer and the like is also very easy to cause the deformation and breakage of the proton exchange membrane, so that the process for preparing the membrane electrode is time-consuming and laborious, and the loss rate is very high.
In order to avoid quality defects in the process of preparing a CCM (composite membrane electrode) and an MEA (membrane electrode) by using a proton exchange membrane, a sectional and single-sided electrode layer coating mode is generally adopted in the prior art, and a B side electrode layer coating is carried out after an A side electrode layer coating is completed. Thus, the following problems are brought about:
■ The production efficiency is low. Because the proton exchange membrane adopted by the membrane electrode of the fuel cell is very small and difficult to control, in the preparation process of sectioning and single-sided, the repeated processing and the winding and unwinding operation are combined, the production efficiency is low, a large number of skilled technical engineering personnel are required to be configured for preparation and processing, the production cost is extremely high, and the yield is extremely low;
■ Because the proton exchange membrane and electrode layer materials adopted by the fuel cell membrane electrode have very high cost, the sectional and single-sided preparation process cannot place all materials and auxiliary materials in a closed running environment, various losses such as physical damage, semi-finished product pollution and finished product pollution to a certain extent are directly caused, the yield is very low, the large-scale mass production requirement cannot be met, and the production cost of the membrane electrode is further increased due to low yield;
■ The existing preparation technology does not realize the preparation of the continuous CCM membrane electrode in a real roll-to-roll mode, so that the subsequent efficient preparation and quality detection of the continuous MEA membrane electrode cannot be realized, a smooth and complete process cycle cannot be formed, and industrialization and scale cannot be realized;
■ The existing technical equipment for preparing the membrane electrode does not have a production information management system capable of being traced in the whole process, and can not realize the establishment of production files and quality management for each MEA membrane electrode unit, so that a high-efficiency high-quality commercial production system in the field of membrane electrode manufacturing is difficult to realize, the cost of the membrane electrode of the fuel cell has a remarkable large-scale benefit bottleneck, and the high manufacturing cost of the membrane electrode occupies more than half of the cost of a power stack of an electric material cell, so that the development of the whole fuel cell industry is greatly restricted.
Disclosure of Invention
In order to fundamentally solve the problems of low efficiency, low yield, huge waste of materials such as a proton exchange membrane and an electrode layer with high cost and the like caused by the fact that the conventional membrane electrode preparation technology cannot effectively control the operation and processing of a proton exchange membrane in the CCM membrane electrode processing, the invention provides a process method and a device for preparing a continuous CCM membrane electrode and further processing the continuous CCM membrane electrode into an MEA membrane electrode monomer.
The invention provides a continuous preparation device for a membrane electrode of a fuel cell MEA, which comprises a continuous preparation device for a CCM membrane electrode of a coiled fuel cell and a continuous preparation device for a membrane electrode of a sheet-shaped fuel cell MEA; wherein,
(1) The continuous preparation device of the CCM membrane electrode of the coiled fuel cell comprises the following components:
the raw material unreeling device is used for releasing the proton exchange membrane with controllable speed and tension;
the original bottom film P stripping device is arranged at the downstream of the raw material unreeling device and is used for stripping the original bottom film of the proton exchange membrane;
the self-adsorption bearing film S1 laminating device is arranged at the downstream of the original bottom film P stripping device, and is used for laminating the self-adsorption bearing film S1 on the B surface of the proton exchange film after the original bottom film is stripped;
the electrode layer A coating and drying device is arranged at the downstream of the self-absorption bearing film S1 attaching device and is used for coating an electrode layer A on the A surface of the proton exchange membrane;
the electrode layer coating quality detection device MVS-1 is arranged at the downstream of the electrode layer A coating and drying device and is used for detecting CCM membrane electrodes after the coating of the electrode layer A;
the self-adsorption bearing film S2 laminating device is arranged at the downstream of the electrode layer coating quality detection device MVS-1 and is used for laminating the self-adsorption bearing film S2 on the A surface of the proton exchange membrane subjected to the coating of the electrode layer A;
The production information code printing device a is arranged at the downstream of the self-absorption bearing film S2 attaching device and is used for printing the production information code of the electrode layer A on the self-absorption bearing film S2;
the self-adsorption bearing film S1 stripping device is arranged at the downstream of the production information code printing device and is used for stripping the self-adsorption bearing film S1;
the electrode layer B coating and drying device is arranged at the downstream of the self-adsorption bearing film S1 stripping device and is used for coating the electrode layer B on the B surface of the proton exchange membrane;
the electrode layer coating quality detection device MVS-2 is arranged at the downstream of the electrode layer B coating and drying device and is used for detecting CCM membrane electrodes after finishing coating of the electrode layer on the B surface;
the production information code printing device B is arranged at the downstream of the electrode layer coating quality detection device MVS-2 and is used for printing the production information code of the electrode layer B on the self-absorption bearing film S2;
the continuous CCM membrane electrode coiled material winding device is arranged at the downstream of the production information code printing device b and is used for winding the continuous CCM membrane electrode after detection;
(2) The continuous preparation device for the membrane electrode of the sheet-shaped fuel cell MEA comprises the following components:
the continuous CCM membrane electrode coiled material unreeling device is used for releasing the continuous CCM membrane electrode coiled material with controllable speed and tension;
The production information code reading device-1 is arranged at the downstream of the unreeling device and is used for reading the production information code of the electrode layer B and outputting code reading data to the central control system;
the electrode layer repairing and drying device-1 is arranged at the downstream of the production information code reading device-1 and is used for repairing and drying a specific area with electrode layer coating flaws according to a working instruction of the central control system;
a gas diffusion layer B1 and gas seal layer B2 bonding device which is arranged at the downstream of the electrode layer repairing and drying device-1 and is used for bonding the gas diffusion layer B1 and the gas seal layer B2 on the B surface of the continuous CCM membrane electrode;
the production information code reading device-2 is arranged at the downstream of the bonding device of the gas diffusion layer B1 and the gas sealing layer B2 and is used for reading the production information code of the electrode layer A and outputting code reading data to a central control system;
the self-adsorption bearing film S2 stripping device is arranged at the downstream of the production information code reading device-2 and is used for separating the self-adsorption bearing film S2 from the continuous CCM membrane electrode coiled material;
the electrode layer repairing and drying device-2 is arranged at the downstream of the self-absorption bearing film S2 stripping device and is used for repairing and drying a specific area with electrode layer coating flaws according to a working instruction of the central control system;
A gas diffusion layer A1 and gas sealing layer A2 bonding device which is arranged at the downstream of the electrode layer repairing and drying device-2 and is used for bonding the gas diffusion layer A1 and the gas sealing layer A2 on the A surface of the continuous CCM membrane electrode;
the code spraying and synchronous cutting device is arranged at the downstream of the bonding device of the gas diffusion layer A1 and the gas sealing layer A2 and is used for printing a product identification code at a designated position of the continuous MEA membrane electrode unit and cutting the continuous MEA membrane electrode unit into the unit with the designated shape.
Based on the device, the invention also provides a continuous preparation method of the membrane electrode of the fuel cell MEA, which comprises the following steps:
step one: stripping an original bottom film P on a B surface of a proton exchange membrane, and attaching a self-adsorption bearing film S1 on the B surface;
step two: coating an electrode layer A on the A surface of the proton exchange membrane;
step three: electrode layer detection is carried out on the surface A, and production data and detection results are recorded in a central control system database;
step four: attaching a self-adsorption bearing film S2 to the surface A, and printing a production information code of the electrode layer A on the self-adsorption bearing film S2;
step five: stripping the self-adsorption bearing film S1, and carrying out overturning conveying on the proton exchange film;
Step six: coating an electrode layer B on the B surface;
step seven: electrode layer detection is carried out on the surface B, production data and detection results are recorded in a central control system database, and meanwhile, production information codes of the electrode layer B are printed on the self-absorption bearing film S2;
step eight: rolling the detected proton exchange membrane with the double-sided coating electrode layers to obtain a continuous rolled fuel cell CCM membrane electrode;
step nine: conveying the continuous coiled fuel cell CCM membrane electrode, acquiring detection information of an electrode layer B through a production information code reading device-1, repairing and drying again, and positioning and attaching a gas diffusion layer B1 and a gas sealing layer B2 to the electrode layer B through a gas diffusion layer B1 and gas sealing layer B2 attaching device;
step ten: conveying the CCM membrane electrode with the gas diffusion layer B1 and the gas sealing layer B2 bonded, stripping the self-absorption bearing film S2 attached to the B surface of the CCM membrane electrode, acquiring detection information of the electrode layer A through a production information code reading device-2, repairing and drying again, and positioning and bonding the gas diffusion layer A1 and the gas sealing layer A2 to the electrode layer A through a gas diffusion layer A1 and gas sealing layer A2 bonding device;
Step eleven: after the double-sided gas diffusion layer and the gas sealing layer are bonded, a continuous MEA membrane electrode is obtained;
step twelve: loading and testing the MEA membrane electrode through an FCT fuel cell working condition simulation testing device, transmitting test data to a central control system database, and marking unqualified MEA membrane electrode monomers;
step thirteen: and printing a product identification code at a designated position of the MEA membrane electrode by a code spraying device, and cutting the continuous MEA membrane electrode subjected to detection and product identification code printing to obtain a sheet-shaped finished fuel cell MEA membrane electrode.
The invention provides a continuous preparation device of a fuel cell CCM membrane electrode, which comprises the following components:
the raw material unreeling device is used for releasing the proton exchange membrane with controllable speed and tension;
the original bottom film P stripping device is arranged at the downstream of the raw material unreeling device and is used for stripping the original bottom film of the proton exchange membrane;
the self-adsorption bearing film S1 laminating device is arranged at the downstream of the original bottom film P stripping device, and is used for laminating the self-adsorption bearing film S1 on the B surface of the proton exchange film after the original bottom film is stripped;
the electrode layer A coating and drying device is arranged at the downstream of the self-absorption bearing film S1 attaching device and is used for coating an electrode layer A on the A surface of the proton exchange membrane;
The electrode layer coating quality detection device MVS-1 is arranged at the downstream of the electrode layer A coating and drying device and is used for detecting CCM membrane electrodes after the coating of the electrode layer A;
the self-adsorption bearing film S2 attaching device is arranged at the downstream of the electrode layer coating quality detecting device MVS-1 and is used for attaching the self-adsorption bearing film S2 to the A surface of the proton exchange membrane with the electrode layer A coating completed;
the production information code printing device a is arranged at the downstream of the self-absorption bearing film S2 attaching device and is used for printing the production information code of the electrode layer A on the self-absorption bearing film S2;
the self-adsorption bearing film S1 stripping device is arranged at the downstream of the production information code printing device and is used for stripping the self-adsorption bearing film S1;
the electrode layer B coating and drying device is arranged at the downstream of the self-adsorption bearing film S1 stripping device and is used for coating the electrode layer B on the B surface of the proton exchange membrane;
the electrode layer coating quality detection device MVS-2 is arranged at the downstream of the electrode layer B coating and drying device and is used for detecting CCM membrane electrodes after finishing coating of the electrode layer on the B surface;
the production information code printing device B is arranged at the downstream of the electrode layer coating quality detection device MVS-2 and is used for printing the production information code of the electrode layer B on the self-absorption bearing film S2;
The continuous CCM membrane electrode coiled material winding device is arranged at the downstream of the production information code printing device b and is used for winding the continuous CCM membrane electrode after detection.
Based on the device, the invention also provides a continuous preparation method of the CCM membrane electrode of the fuel cell, which comprises the following steps:
step one: stripping an original bottom film P on a B surface of a proton exchange membrane, and attaching a self-adsorption bearing film S1 on the B surface;
step two: coating an electrode layer A on the A surface of the proton exchange membrane;
step three: electrode layer detection is carried out on the surface A, and production data and detection results are recorded in a central control system database;
step four: attaching a self-adsorption bearing film S2 to the surface A, and printing a production information code of the electrode layer A on the self-adsorption bearing film S2;
step five: stripping the self-adsorption bearing film S1, and carrying out overturning conveying on the proton exchange film;
step six: coating an electrode layer B on the B surface;
step seven: electrode layer detection is carried out on the surface B, production data and detection results are recorded in a central control system database, and meanwhile, production information codes of the electrode layer B are printed on the self-absorption bearing film S2;
step eight: and rolling the detected proton exchange membrane with the double-sided coating electrode layers to obtain the continuous rolled fuel cell CCM membrane electrode.
The invention provides a continuous preparation device for a Membrane Electrode Assembly (MEA) of a sheet fuel cell, which comprises the following components:
the continuous CCM membrane electrode coiled material unreeling device is used for releasing the continuous CCM membrane electrode coiled material with controllable speed and tension;
the production information code reading device-1 is arranged at the downstream of the unreeling device and is used for reading the production information code of the electrode layer B and outputting code reading data to the central control system;
the electrode layer repairing and drying device-1 is arranged at the downstream of the production information code reading device-1 and is used for repairing and drying a specific area with electrode layer coating flaws according to a working instruction of the central control system;
a gas diffusion layer B1 and gas seal layer B2 bonding device which is arranged at the downstream of the electrode layer repairing and drying device-1 and is used for bonding the gas diffusion layer B1 and the gas seal layer B2 on the B surface of the continuous CCM membrane electrode;
the production information code reading device-2 is arranged at the downstream of the bonding device of the gas diffusion layer B1 and the gas sealing layer B2 and is used for reading the production information code of the electrode layer A and outputting code reading data to a central control system;
the self-adsorption bearing film S2 stripping device is arranged at the downstream of the production information code reading device-2 and is used for separating the self-adsorption bearing film S2 from the continuous CCM membrane electrode coiled material;
The electrode layer repairing and drying device-2 is arranged at the downstream of the self-absorption bearing film S2 stripping device and is used for repairing and drying a specific area with electrode layer coating flaws according to a working instruction of the central control system;
a gas diffusion layer A1 and gas sealing layer A2 bonding device which is arranged at the downstream of the electrode layer repairing and drying device-2 and is used for bonding the gas diffusion layer A1 and the gas sealing layer A2 on the A surface of the continuous CCM membrane electrode;
the code spraying and synchronous cutting device is arranged at the downstream of the bonding device of the gas diffusion layer A1 and the gas sealing layer A2 and is used for printing a product identification code at a designated position of the continuous MEA membrane electrode unit and cutting the continuous MEA membrane electrode unit into the unit with the designated shape.
Based on the device, the invention also provides a continuous preparation method of the Membrane Electrode Assembly (MEA) of the sheet-shaped fuel cell, which comprises the following steps:
step I: conveying the continuous coiled fuel cell CCM membrane electrode, acquiring detection information of an electrode layer B through a production information code reading device-1, repairing and drying again, and positioning and attaching a gas diffusion layer B1 and a gas sealing layer B2 to the electrode layer B through a gas diffusion layer B1 and gas sealing layer B2 attaching device;
Step II: conveying the CCM membrane electrode with the gas diffusion layer B1 and the gas sealing layer B2 bonded, stripping the self-absorption bearing film S2 attached to the B surface of the CCM membrane electrode, acquiring detection information of the electrode layer A through a production information code reading device-2, repairing and drying again, and positioning and bonding the gas diffusion layer A1 and the gas sealing layer A2 to the electrode layer A through a gas diffusion layer A1 and gas sealing layer A2 bonding device;
step III: after the double-sided gas diffusion layer and the gas sealing layer are bonded, a continuous MEA membrane electrode is obtained;
step IV: loading and testing the MEA membrane electrode through an FCT fuel cell working condition simulation testing device, transmitting test data to a central control system database, and marking unqualified MEA membrane electrode monomers;
step V: and printing a product identification code at a designated position of the MEA membrane electrode by a code spraying device, and cutting the continuous MEA membrane electrode subjected to detection and product identification code printing to obtain a sheet-shaped finished fuel cell MEA membrane electrode.
The device provided by the invention further comprises: the FCT fuel cell working condition simulation test device is arranged at the downstream of the gas diffusion layer A1 and gas sealing layer A2 laminating device and is used for carrying out loading test on the continuous MEA membrane electrode monomers to obtain final quality data.
In the method provided by the invention, after the continuous coiled fuel cell CCM membrane electrode is prepared, the method further comprises the following steps:
sorting the continuous coiled fuel cell CCM membrane electrodes, repairing according to the production information code reading result, and marking membrane electrode monomers which cannot be repaired so as to be convenient to reject;
and (3) after the repaired continuous coiled fuel cell CCM membrane electrode is used for preparing the MEA membrane electrode, rechecking is carried out through the FCT fuel cell working condition simulation test device, so that the reliability and traceability of a repair result are ensured.
In the method provided by the invention, the method for coating the electrode layer is doctor blade coating, screen printing, gravure printing or spraying.
In the method provided by the invention, in the step of attaching the proton exchange membrane to the self-absorption carrier membrane, the method comprises the following steps:
detecting the running state and position of the proton exchange membrane through a sensor;
and loading static electricity on the self-adsorption bearing film, and attaching the self-adsorption bearing film to the proton exchange film through an attaching device.
In the method provided by the invention, the self-absorption bearing film outputs a high-voltage electric field through the electrostatic loading device, the proton exchange film is adsorbed on the self-absorption bearing film, the voltage, the current intensity and the output polarity are adjusted according to the preparation process, the voltage adjustment range is 20 KV-50 KV, the current adjustment intensity is 500 mA-1000 mA, and the output polarity is an anode or a cathode.
In the method provided by the invention, the step of coating the electrode layer A/B on the A/B surface of the proton exchange membrane comprises the following steps:
the operation state of the self-adsorption bearing film S1/S2 is controlled by an accurate conveying system, the proton exchange film adsorbed on the self-adsorption bearing film S1/S2 is conveyed to an electrode layer coating device, the operation state is managed by a central control system, and meanwhile, the error value of a transmission system is detected and corrected by a photoelectric sensor;
and coating the electrode layer within a set size range according to the instruction of the central control system.
In the method provided by the invention, after coating the electrode layer on the two sides of the proton exchange membrane, the step of detecting the electrode layer comprises the following steps:
image acquisition is carried out on the electrode layer coating area through an electrode layer detection device, brightness signals are converted into digital signals, and judgment is carried out through software preset in a central control system;
coating the electrode layer with a CCM membrane electrode with a defect, marking a data generating system, and recording the data generating system in a visible information code;
and (5) after the detection of the electrode layer detection device is completed, obtaining the continuous CCM membrane electrode coiled material.
In the method provided by the invention, the self-absorption bearing film S1/S2 is subjected to at least one of surface activation treatment, physical processing treatment and chemical method treatment to perform surface purification and maintain the transparent/near-transparent property, so that the adhesive and substances which can cause adhesion and pollution are removed.
In the method provided by the invention, the two sides of the self-absorption bearing film S1/S2 are provided with the functional areas with the width of 10mm-30mm, and the functional areas are used for printing visual production information codes.
The invention belongs to the technical field of proton exchange membrane fuel cells (Proton exchange membrane fuel cell-PEMFC), and discloses a method for preparing a CCM membrane electrode and an MEA membrane electrode of a fuel cell by batch processing a coiled proton exchange membrane, wherein an electrode layer is coated on the proton exchange membrane, so that the continuous preparation of the CCM membrane electrode and the MEA membrane electrode from reel to reel is realized. The self-absorption bearing film which can be attached and peeled for multiple times is adopted as a bearing and conveying system, and the continuous coiled CCM film electrode is prepared. Further, the continuous lamination of the gas diffusion layer and the gas sealing layer can be realized to obtain the continuous MEA membrane electrode. The invention also discloses a device for preparing the CCM membrane electrode and the MEA membrane electrode of the fuel cell, which provides running state signals and production data information for a central control system through an induction device, a signal acquisition device, an electrode layer detection system (machine vision system MVS) and an FCT fuel cell working condition simulation test device, and manages the running state of the device through programmed instructions, thereby realizing an automatic and efficient manufacturing process. The invention adopts an accurate conveying system so as to achieve high-precision longitudinal and transverse operation control in conveying.
The specific method for preparing the continuous CCM membrane electrode and the MEA membrane electrode adopts a self-absorption bearing membrane as a carrier and a production information record carrier, wherein the self-absorption bearing membrane is a film which is subjected to modification treatment and has certain strength, and the absorption strength in the preparation process of the invention can be adjusted. The self-absorption bearing film does not contain any adhesive component, has extremely low surface friction coefficient, and does not generate mechanical damage and chemical substance pollution to a proton exchange film, an electrode layer and the like.
The invention provides a device for preparing a continuous CCM membrane electrode and further preparing an MEA membrane electrode, which provides running state signals and parameters for a central control system through sensors and signal acquisition devices distributed at each station of the whole system and a machine vision recognition system MVS and FCT fuel cell working condition simulation test device, and manages the running state of the device through programmed instructions, thereby realizing the automatic and efficient preparation process of the membrane electrode; the preparation process adopts an accurate conveying system, and the conveying system can achieve high-precision longitudinal and transverse operation control in the conveying process.
The preparation method and the device can be suitable for operation control and management of the proton exchange membrane with extremely thin thickness and approaching the limit of physical properties, thereby further meeting the preparation of continuous CCM membrane electrodes and further processing into the preparation process of MEA membrane electrode monomers.
The invention can realize the autonomous innovation of the domestic proton exchange membrane fuel cell field in the core parts and key equipment technology, break through the technical bottleneck in batch manufacturing, reduce the manufacturing cost, and thereby promote the development rhythm of the industry.
The invention creatively adopts the self-absorption film without any adhesive component as a carrier and a production data recording medium, combines an accurate operation control system, takes the self-absorption carrier film as a reliable conveying carrier, thereby realizing the preparation from an original coiled proton exchange film to a coiled fuel cell CCM membrane electrode, and simultaneously realizing high-quality production management by writing the production data of each membrane electrode monomer in a designated area of the self-absorption carrier film through a code spraying device. The whole manufacturing process of the continuous MEA membrane electrode monomer can be obtained after further processing, and the large-scale and efficient manufacturing of the fuel cell membrane electrode is realized.
The invention has high compatibility in technology. Due to the continuous iterative updating of proton exchange membrane material technology, future proton exchange membrane fuel cells gradually employ proton exchange membranes with thicknesses approaching physical limits. The accurate conveying system based on the self-adsorption bearing film can meet the conveying and processing process of the proton exchange film which is close to the limit thickness and continuously innovated in material property, and can adapt to the manufacturing requirement of the fuel cell film electrode with higher technical standard, thereby reducing the research and development, manufacturing and equipment upgrading iteration cost of the fuel cell and realizing the large-scale industrial application of the proton exchange film fuel cell as soon as possible.
The invention has technical prospect, realizes the modularized management of the electrode layer coating stage through independently developed central control system software, and can adapt to the coating processing of various coating means (including but not limited to doctor blade coating, screen printing, gravure printing and spraying) on the 2 side surface of the proton exchange membrane.
The invention has technical reliability, adopts the machine vision recognition system MVS and FCT fuel cell working condition simulation test device to carry out electrode layer on-line detection and production data management, and realizes the zero defect production process.
The invention is based on an innovative self-absorption carrier film system, has high compatibility to proton exchange films with various materials and various thicknesses, has a certain prospective, and can adapt to the processing process of the proton exchange film approaching to the physical limit thickness in the future. The invention also provides a preparation method and a device for the continuous CCM membrane electrode and the MEA membrane electrode, which are combined with central control system software of independent intellectual property rights and mature automatic control technology to realize continuous and reliable preparation of the CCM membrane electrode and further continuously process MEA membrane electrode monomers.
The invention refers to the processing technology and the polymer material modification technology of the traditional film industry, adopts mature machine vision recognition technology and the like to carry out quality management and control, and develops a set of FCT (Fuel Cell Test) fuel cell working condition simulation test device with independent intellectual property rights and central control system software to carry out whole-course data management and production control, thereby providing a continuous CCM membrane electrode preparation and MEA membrane electrode preparation method with high efficiency, intellectualization, integration and totally-enclosed operation, simultaneously greatly improving the productivity, greatly reducing the demands of technical engineering personnel, and providing theoretical productivity of membrane electrode monomers with the annual productivity of more than 15 ten thousand square meters.
The FCT fuel cell working condition simulation test is to utilize the state of continuous MEA which is not cut off, carry out double-sided sealing pressurization on line, simultaneously input hydrogen and oxygen to initiate electrochemical reaction, the starting speed based on the electrochemical reaction is very fast, current and voltage data can be recorded after a few seconds generally, a test platform and a test mould (bipolar plate) with the length of 1-2 meters can meet the test of 10-20 membrane electrode monomers, and the effect of on-line actual measurement of the membrane electrode monomers can be achieved by matching with the action of a coiled material conveying coordination mechanism.
The invention establishes the technical route of the membrane electrode preparation process and the device with high compatibility (proton exchange membrane applicability), high modularization (electrode layer coating process is customizable), high reliability (whole process quality is traceable) and high yield (membrane electrode with annual production of more than 15 ten thousand square meters), thereby breaking through the scale bottleneck which puzzles the fuel cell industry and realizing independent intellectual property and practical application of core technical equipment.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for continuous preparation of CCM membrane electrodes of a fuel cell according to the present invention.
Fig. 2 is a schematic structural view of an apparatus for further continuously preparing MEA membrane electrodes of the CCM membrane electrode of the fuel cell of the present invention.
FIG. 3a is a schematic representation of a continuous CCM membrane electrode according to the present invention.
FIG. 3b is a schematic illustration of the A-side of a continuous CCM membrane electrode of the present invention.
FIG. 3c is a schematic representation of the B-side of a continuous CCM membrane electrode according to the present invention.
FIG. 4a is a schematic representation of a CCM membrane electrode unit according to the present invention.
FIG. 4b is a schematic illustration of an MEA membrane electrode unit according to the present invention.
Detailed Description
The invention will be described in further detail with reference to the following specific examples and drawings. The procedures, conditions, experimental methods, etc. for carrying out the present invention are common knowledge and common knowledge in the art, except for the following specific references, and the present invention is not particularly limited.
In fig. 1, 1-1: a raw material unreeling device; 1-2: an original carrier film P stripping device; 1-3: a self-adsorption bearing film S1 laminating device; 1-4, 1-5: coating and drying the electrode layer A; 1-6: electrode layer coating quality detection device MVS-1;1-7: a self-adsorption bearing film S2 laminating device; 1-8: a production information code printing device a;1-9: a self-adsorption carrier film S1 stripping device; 1-11, 1-12: coating and drying the electrode layer B; 1-13: electrode layer coating quality detection device MVS-2;1-14: a production information code printing device b;1-15: continuous CCM membrane electrode coiled material winding device.
In fig. 2, 2-1: a continuous CCM membrane electrode coiled material unreeling device; 2-2: a production information code reading device-1; 2-3, 2-4: electrode layer repair drying device-1; 2-5: a bonding device for bonding the gas diffusion layer B1 and the gas sealing layer B2; 2-7: a production information code reading device-2; 2-8: a self-adsorption carrier film S2 stripping device; 2-9, 2-10: electrode layer repair drying device-2; 2-11: a bonding device for bonding the gas diffusion layer A1 and the gas sealing layer A2; 2-12: the FCT fuel cell working condition simulation test device; 2-13, 2-14: code spraying and synchronous cutting devices.
The invention provides a preparation method of a fuel cell CCM membrane electrode, which is characterized in that a double-sided coating electrode layer of a proton exchange membrane in an original state is in a roll shape, a high-strength self-absorption bearing membrane which is subjected to surface treatment and can be synchronously attached and detached for many times is adopted as a bearing and conveying system, and production data information in the coating processing process of the electrode layer is recorded at a designated position of the self-absorption bearing membrane through detection and data recording of an electrode layer detection system (MVS), so that the roll-shaped fuel cell CCM membrane electrode is obtained after batch treatment, and a continuous CCM membrane electrode coiled material with controllable quality is obtained. And further attaching the gas diffusion layer and the gas sealing layer to obtain a continuous MEA membrane electrode with controllable quality, and further performing synchronous cutting to obtain the sheet MEA membrane electrode.
The preparation method of the CCM membrane electrode of the fuel cell provided by the invention comprises the following steps:
the continuous roll-to-roll processing of the proton exchange membrane with various materials can be adapted, and the processing process comprises the procedures of double-sided pretreatment, coating, detection, lamination, quality control, cutting and the like;
the method can be suitable for continuous roll-to-roll processing of proton exchange membranes with various thicknesses, and comprises the steps of double-sided pretreatment, coating, detection, lamination, quality control, cutting and the like in the processing process of the continuous roll-to-roll processing of the proton exchange membranes with extremely thin thickness and mechanical properties close to the limit;
in the whole process of continuous roll-to-roll processing, a self-absorption bearing film is used as a bearing conveying system and a production data recording medium, so that the precise control and the whole-course quality management of the continuous roll-to-roll processing process are achieved;
when the self-absorption bearing film is used as a bearing conveying system, multiple synchronous lamination and nondestructive stripping can be carried out, so that the whole process of continuous roll-to-roll processing is realized;
when the self-adsorption bearing film is used as a production data recording medium, the production data and the quality detection result of each membrane electrode monomer can be recorded in the whole course, so that the zero loss target in the subsequent processing process is realized;
The device for continuously producing the CCM membrane electrode of the fuel cell from reel to reel completes the whole processing process of the CCM membrane electrode of the continuous fuel cell, and covers the working procedures of double-sided pretreatment, coating, lamination, quality control, cutting and the like;
stripping an original bottom film P on the B surface of the proton exchange membrane, and then synchronously attaching a self-absorption bearing film S1;
coating an electrode layer A on the A surface of the proton exchange membrane by one of doctor blade coating, screen printing, gravure printing and spraying;
electrode layer detection is carried out on the surface A of the proton exchange membrane coated with the electrode layer A, and production data and detection results are recorded in a central control system database;
synchronously attaching a self-adsorption bearing film S2 to the A surface of the proton exchange film coated with the electrode layer A, and printing a production information code of the electrode layer A at a designated position of the self-adsorption bearing film S2
Stripping the self-adsorption carrier film S1 on the B surface of the proton exchange film, and then overturning and conveying the proton exchange film through an accurate conveying system;
coating an electrode layer B on the B surface of the proton exchange membrane by one of doctor blade coating, screen printing, gravure printing and spraying;
electrode layer detection is carried out on the B surface of the proton exchange membrane coated by the electrode layer B, production data and detection results are recorded in a central control system database, and meanwhile, a production information code of the electrode layer B is printed at a designated position of the self-adsorption bearing membrane S2;
And rolling the detected proton exchange membrane with the double-sided coating electrode layers to obtain continuous rolled fuel cell CCM membrane electrodes, wherein the production data and detection result of each CCM membrane electrode monomer can be read through information codes or from a central control system.
The invention further comprises the steps of:
the method comprises the steps of sorting the B surface of a continuous coiled fuel cell CCM membrane electrode, repairing according to an information code reading result, wherein the repairing method is one of doctor blade coating, screen printing, gravure printing and spraying, and an electrode layer B which cannot be repaired is marked so as to be convenient to reject, so that the zero defect rate in the subsequent working procedure is ensured;
conveying the repaired continuous coiled fuel cell CCM membrane electrode, and accurately positioning and attaching the commercial gas diffusion layer B1 and the gas sealing layer B2 to the electrode layer B through an attaching device;
conveying CCM membrane electrodes which are bonded with the gas diffusion layer B1 and the gas sealing layer B2, sorting the A surface of the continuous coiled fuel cell CCM membrane electrodes, repairing according to an information code reading result, wherein the repairing method is one of doctor blade coating, screen printing, gravure printing and spraying, and marking the electrode layer A which cannot be repaired so as to be convenient to reject, so that the zero defect rate in the subsequent process is ensured;
Conveying the repaired continuous coiled fuel cell CCM membrane electrode, and accurately positioning and attaching the commercial gas diffusion layer A1 and the gas sealing layer A2 to the electrode layer A through an attaching device;
after the double-sided gas diffusion layers (A1, B1) and the gas sealing layers (A2, B2) are completed, a continuous MEA membrane electrode is obtained, online detection is carried out through an FCT fuel cell working condition simulation test device, and defective products are marked and recorded into a production data system;
printing product identification codes of the continuous MEA membrane electrodes and synchronously cutting to obtain sheet-shaped finished MEA membrane electrodes;
the operation of the self-adsorption bearing film S1/S2 adopts an accurate conveying system, and the conveying system can achieve high-precision longitudinal and transverse operation control in conveying;
the accurate conveying system uses the self-absorption bearing film S1/S2 as a carrier, the absorption strength of the self-absorption bearing film S1/S2 is adjustable, the self-absorption bearing film S1/S2 does not contain any adhesive, and mechanical damage and chemical substance pollution to a proton exchange film, an electrode layer and the like are not generated;
the recording position of the production information code is reserved on the 2 side of the self-adsorption bearing film S1/S2, and the production data and the detection result of the film electrode monomer are recorded in real time through a code spraying device.
According to the invention, the self-adsorption bearing film S1/S2 outputs an electric field through the electrostatic loading device, the proton exchange film can be adsorbed on the self-adsorption bearing film S1/S2, voltage, current intensity and output polarity are adjusted according to different preparation process requirements, the voltage adjustment range is 20 KV-50 KV, the current adjustment intensity is 500 mA-1000 mA, and the output polarity is an anode or a cathode.
The invention completes the conveying control of the self-adsorption bearing film S1/S2 through the accurate conveying system, wherein the operation precision control of the accurate conveying system on the self-adsorption bearing film S1/S2 is as follows: + -0.1 mm/step.
The self-absorption bearing film S1/S2 used in the invention is subjected to surface purification and maintains transparent/near-transparent properties through at least one of surface activation treatment, physical processing treatment and chemical method treatment, and does not contain any adhesive or other substances causing adhesion and pollution.
After the original bottom film P of the proton exchange film is peeled off, the step of synchronously attaching the self-adsorption bearing film S1 on the B surface of the proton exchange film must comprise the following steps:
detecting the running state and position of the proton exchange membrane through a sensor;
static electricity is loaded on the self-adsorption bearing film S1, the self-adsorption bearing film is attached to the B surface of the proton exchange membrane through an attaching device, effective support is formed, the attaching effect is smooth and not tilted, the integrity is kept in the conveying process after attaching, and the self-adsorption bearing film cannot loosen and laterally move.
In the step of coating the electrode layer A on the A surface of the proton exchange membrane, the invention must comprise the following steps:
the coating operation of the electrode layer A is carried out according to the instruction of the central control system within the set size range by means of the accurate conveying device of the self-absorption bearing film S1;
And (3) drying the electrode layer A in one of a high-temperature drying tunnel and a low-temperature drying tunnel, measuring and recording production data and detection results of the dried electrode layer A coating through an electrode layer detection system MVS-1, and recording the data through a central control system.
In the step of coating the electrode layer B on the B surface of the proton exchange membrane, the method of the invention must comprise the following steps:
attaching a self-adsorption bearing film S2 to the A surface of the proton exchange film coated with the electrode layer A, printing a production information code of the electrode layer A at a designated position of the self-adsorption bearing film S2, and synchronously stripping the self-adsorption bearing film S1 on the B surface of the proton exchange film;
the proton exchange membrane which is coated on the electrode layer A is conveyed to the electrode layer B coating device through the self-adsorption bearing membrane S2, the running state is managed through the central control system, and meanwhile, the error value of the transmission system is detected and corrected through the photoelectric sensor;
coating the electrode layer B within a set size range according to the instruction of the central control system;
and (3) drying the electrode layer B in one of a high-temperature drying tunnel and a low-temperature drying tunnel, measuring and recording production data and detection results of the dried electrode layer B coating through an electrode layer detection system MVS-2, recording the data through a central control system, and printing a production information code of the electrode layer B at a designated position of the self-adsorption bearing film S2.
After coating the electrode layers A and B on the two surfaces of the proton exchange membrane, the invention must include the following steps:
the continuous CCM membrane electrode with the electrode layer coating is conveyed to an electrode layer detection system (machine vision system MVS) by taking the self-adsorption carrier membrane as a carrier conveyor;
image acquisition is carried out on the electrode layer coating area through an electrode layer detection system (machine vision system MVS), brightness signals are converted into digital signals, and judgment is carried out through software preset in a central control system;
coating the electrode layer with a CCM membrane electrode with a defect, marking a data generating system, and recording the data generating system in a visible information code;
and (5) after the detection of an electrode layer detection system (MVS) is completed, the continuous CCM membrane electrode coiled material is obtained.
In the invention, in the process of carrying out subsequent processing on the continuous CCM membrane electrode coiled material, the electrode layer is repaired according to the information code reading result, the repairing method is one of doctor blade coating, screen printing, gravure printing and spraying, the membrane electrode monomer which cannot be repaired is marked, and the zero defect rate in the subsequent working procedure is ensured; performing secondary detection on the continuous MEA membrane electrode obtained after electrode layer repair and gas diffusion and gas sealing layer lamination are completed, so as to ensure the reliability of repair results; and obtaining the MEA membrane electrode monomer with reliable quality through secondary detection.
The step of attaching the gas diffusion layer and the gas sealing layer to the two sides of the continuous CCM membrane electrode coiled material of the invention further comprises the following steps:
conveying the self-adsorption bearing film S2 through an accurate conveying system, conveying the continuous CCM film electrode coiled material to a laminating device, positioning through a central control system, detecting and correcting operation errors through a sensor, laminating a pre-prepared commercial gas diffusion layer B1 and a gas sealing layer B2 to an electrode layer B through the laminating device, and finishing B-face processing of the continuous CCM film electrode through pressing;
the continuous CCM membrane electrode coiled material attached with the gas diffusion layer B1 and the gas sealing layer B2 is conveyed to a self-adsorption bearing membrane S2 stripping device through an accurate conveying system, after the self-adsorption bearing membrane S2 is stripped, the self-adsorption bearing membrane S2 is positioned through a central control system, the running error is detected and corrected through a sensor, the pre-prepared commercial gas diffusion layer A1 and the pre-prepared commercial gas sealing layer A2 are attached to the electrode layer A through an attaching device, and double-sided processing of the continuous CCM membrane electrode is completed through pressing;
in the step of the continuous MEA membrane electrode of the present invention which can be further processed into a finished MEA membrane electrode unit, it is necessary to include:
The continuous MEA membrane electrode is conveyed to an FCT fuel cell working condition simulation test device for secondary quality detection, and detection data are recorded into a central control system software database;
the method comprises the steps of simultaneously managing the conveying state of the continuous MEA membrane electrode according to the detection signal of a sensor through the instruction of a central control system;
printing a product identification code on each MEA membrane electrode unit through a code spraying device;
the continuous MEA membrane electrode is cut into MEA membrane electrode monomers by a synchronous cutting device.
The invention also provides a device for continuously preparing the CCM membrane electrode of the fuel cell, which comprises:
the raw material unreeling device is used for releasing the proton exchange membrane with controllable speed and tension;
the proton exchange membrane original bottom film P stripping device is arranged at the downstream of the raw material unreeling device and at the upstream of the self-adsorption bearing film S1 laminating device and is used for stripping the original bottom film of the proton exchange membrane;
the self-adsorption bearing film S1 laminating device is arranged at the downstream of the original bottom film P stripping device, and is arranged at the upstream of the A-side coating device, and the self-adsorption bearing film S1 is laminated to the B side of the proton exchange film which is stripped by the original bottom film P to form a whole which is easy to accurately convey;
The electrode layer A coating and drying device is arranged at the downstream of the self-adsorption bearing film S1 attaching device and at the upstream of the electrode layer coating quality detecting device MVS-1 and is used for coating an electrode layer A on the A surface of the proton exchange film;
the electrode layer coating quality detection device MVS-1 is arranged at the downstream of the electrode layer A coating and drying device and is used for detecting CCM membrane electrodes after the coating of the electrode layer A;
the self-adsorption bearing film S2 laminating device is arranged at the downstream of the electrode layer coating quality detection device MVS-1, and the upstream of the electrode layer A production information code printing device and is used for laminating the self-adsorption bearing film S2 to the A surface of the proton exchange membrane after coating of the electrode layer A to form a whole easy to accurately convey;
the production information code printing device is arranged at the downstream of the self-absorption bearing film S2 attaching device and at the upstream of the self-absorption bearing film S1 stripping device and is used for printing the production information code of the electrode layer A at the appointed position of the self-absorption bearing film S2;
the self-adsorption bearing film S1 stripping device is arranged at the downstream of the production information code printing device, and the self-adsorption bearing film S1 is stripped at the upstream of the electrode layer A coating and drying device;
the electrode layer B coating and drying device is arranged at the downstream of the self-adsorption bearing film S1 stripping device and at the upstream of the electrode layer coating quality detection device MVS-2 and is used for coating the electrode layer B on the B surface of the proton exchange film;
The electrode layer coating quality detection device MVS-2 is arranged at the downstream of the electrode layer B coating and drying device and is used for detecting CCM membrane electrodes after the coating of the electrode layer on the B surface;
the production information code printing device is arranged at the downstream of the electrode layer coating quality detection device MVS-2 and at the upstream of the continuous CCM membrane electrode winding device and is used for printing the production information code of the electrode layer B at the appointed position of the self-adsorption bearing film S2;
and the continuous CCM membrane electrode coiled material winding device is arranged at the downstream of the production information code printing device and used for winding the continuous CCM membrane electrode which is detected.
The invention also provides a device for continuously preparing the MEA membrane electrode of the fuel cell CCM, which comprises the following components:
the continuous CCM membrane electrode coiled material unreeling device is used for releasing the continuous CCM membrane electrode coiled material with controllable speed and tension;
the production information code reading device-1 is arranged at the downstream of the unreeling device, and the electrode layer repairing and drying device-1 is arranged at the upstream of the electrode layer repairing and drying device-1, reads the electrode layer B information code loaded by the self-adsorption bearing film S2 and outputs code reading data to the central control system;
the electrode layer repairing and drying device-1 is arranged at the downstream of the production information code reading device, and the upstream of the bonding device of the gas diffusion layer B1 and the gas sealing layer B2, and is used for accurately repairing and drying a specific area with electrode layer coating flaws according to a working instruction of the central control system;
A bonding device of the gas diffusion layer B1 and the gas sealing layer B2, which is arranged at the downstream of the electrode layer repairing and drying device-1 and at the upstream of the production information code reading device-2, and is used for bonding the gas diffusion layer B1 and the gas sealing layer B2 on the B surface of the continuous CCM membrane electrode;
the production information code reading device-2 is arranged at the downstream of the bonding device of the gas diffusion layer B1 and the gas sealing layer B2, is arranged at the upstream of the stripping device of the self-adsorption bearing film S2, reads the information code of the electrode layer A before stripping the adsorption bearing film S2 and outputs code reading data to the central control system;
the self-adsorption bearing film S2 stripping device is arranged at the downstream of the production information code reading device-2 and at the upstream of the electrode layer repairing and drying device-2 and is used for separating the self-adsorption bearing film S2 from a continuous CCM (continuous CCM) film electrode coiled material with a B surface bonded with a gas diffusion layer B1 and a gas sealing layer B2;
the electrode layer repairing and drying device-2 is arranged at the downstream of the self-adsorption bearing film S2 stripping device, and the upstream of the gas diffusion layer A1 and the gas sealing layer A2 laminating device, and is used for accurately repairing and drying a specific area with electrode layer coating flaws according to a working instruction of the central control system;
the bonding device of the gas diffusion layer A1 and the gas sealing layer A2 is arranged at the downstream of the electrode layer repairing and drying device-2, and is arranged at the upstream of the FCT fuel cell working condition simulation test device and is used for bonding the gas diffusion layer A1 and the gas sealing layer A2 on the A surface of the continuous CCM membrane electrode;
The FCT fuel cell working condition simulation test device is arranged at the downstream of the gas diffusion layer A1 and gas sealing layer A2 laminating device and at the upstream of the code spraying and synchronous cutting device and is used for detecting and finishing the repair of the double-sided electrode layer, and simultaneously, the double-sided electrode layer retest of the continuous MEA membrane electrode laminated by the gas diffusion layer and the gas sealing layer is finished;
the code spraying and synchronous cutting device is arranged at the downstream of the FCT fuel cell working condition simulation testing device and is used for printing a product identification code at a designated position of a continuous MEA membrane electrode monomer for finishing electrode layer retest and cutting the continuous MEA membrane electrode into monomers with designated shapes.
The attaching mode of the proton exchange membrane and the self-absorption carrier membrane in the invention is as follows: the proton exchange membrane and the self-absorption carrier membrane are discharged through the extension and extrusion of a group of flexible flattening rollers, and the strong charge polarity generated by the static loading device on the surface of the self-absorption carrier membrane can firmly adsorb the proton exchange membrane on the surface of the self-absorption carrier membrane. The voltage range of the static loading device is 20 KV-50 KV, and the current intensity is 500 mA-1000 mA.
The bonding mode of the proton exchange membrane coated with the electrode layer, the gas diffusion layer and the gas sealing layer comprises the following steps: and (3) laminating and hot-pressing the prefabricated gas diffusion layer and the gas sealing layer material according to specific positions by the extrusion action of a group of specific hot-pressing dies according to the command signals of the central control system, and pressing the prefabricated gas diffusion layer and the gas sealing layer material and the proton exchange membrane coated with the electrode layer into a whole.
The accurate conveying system is a closed running environment, uses the self-absorption bearing film as a mechanical conveying carrier, bears transverse tension, longitudinal tension and compression roller pressure from a transmission system, avoids the mechanical forces from acting on the proton exchange film and the semi-finished product of the film electrode after each processing procedure until the continuous CCM film electrode coiled material is finished, and can be further processed into a sheet MEA film electrode finished product. The accurate conveying system collects operation parameters through the sensing devices of each group, and the operation parameters are controlled in real time through the central control system, wherein the operation accuracy is +/-0.1 mm/step (the operation error of each action is less than +/-0.1 mm).
The invention provides a special carrier film system, the width of the used carrier film is larger than that of a proton exchange film, a blank edge is reserved on the side of the carrier film 2, the blank edge is a main stress position of an accurate conveying system, and meanwhile, the blank edge is a position for code spraying printing, so that a data file can be established for the coating process and the result of each surface of each membrane electrode monomer, printing is performed in a mode of information codes, and the whole process is controllable and traceable.
The continuous CCM membrane electrode is a proton exchange membrane which keeps a roll shape, has completed coating and detection of double-sided electrode layers, and can be used for subsequent MEA membrane electrode preparation, and the stage is a relatively rigid preparation process. The subsequent MEA membrane electrode must be customized according to different application scenarios, and needs to be customized by matching with different polar flow plates (bipolar plates), which is a sheet-shaped finished product obtained by pressing a gas diffusion layer and a gas sealing layer on a rolled CCM membrane electrode and then cutting the gas diffusion layer and the gas sealing layer, and is used for stack assembly of a fuel cell, and the basic assembly structure is as follows: a monopolar plate/MEA/bipolar plate … … MEA/monopolar plate.
The core of the accurate conveying system is that acting forces are loaded on the self-absorption bearing film, so that the stress on the surfaces of the proton exchange film and other materials is avoided, the conveying problem of the proton exchange film and the problem of accumulated errors generated during processing of each working procedure are thoroughly solved fundamentally, the self-absorption bearing film is a 'conveying belt', the accurate conveying system outputs all acting forces on the 'conveying belt', and the running parameters can be accurately controlled based on the high strength and flatness of the static film.
Since CCM membrane electrodes are double-sided coated electrode layers, coating defects in the electrode layers will cause errors in the performance of the MEA membrane electrodes during fuel cell stacking operations, known in the industry as "uniformity" problems. The invention adds an electrode layer detection system after finishing CCM membrane electrode double-sided coating, the system is derived from a machine vision system Machine Vision System-MVS, optical measurement is carried out on electrode layer coating through a CCD/CMOS photosensitive device, and coating quality identification is carried out by combining with prefabricated software. Since the Pt/C electrode layer is single black, the accuracy of optical recognition can be ensured. Meanwhile, the identification system can carry out online physical marking, effectively marks the defect monomers and records the defect monomers into a production data system. Because the running speed of the whole device is relatively slow (the expected running speed per minute is 300 cm-500 cm), and the cooperative device with the conveying is used for carrying out balanced management on continuous conveying, pause processing and detection actions, the residence time of each group of CCM membrane electrode monomers (the common length is 10 cm-15 cm) in the electrode layer detection system is enough to finish detection and identification, and the common sensitization time is in seconds, so that the condition of carrying out machine vision system identification on line can be met. After the electrode layer is repaired, the CCM membrane electrode is manufactured by pressing a gas diffusion layer and a gas sealing layer to the 2 side of the CCM membrane electrode through a bonding procedure, and the MEA membrane electrode monomer is required to be subjected to secondary rechecking to ensure the qualification rate. The electrochemical reaction speed after hydrogen and oxygen are loaded is in the unit of seconds, so that the fuel cell working condition simulation test can be performed online after a test platform with enough length is arranged. The continuous MEA membrane electrode can enable the efficiency of the fuel cell working condition simulation test to reach the highest efficiency.
Example 1
In this embodiment, the original state of the proton exchange membrane is in a roll shape, and before the electrode layer a is coated, the original roll-shaped proton exchange membrane is linearly transported by a raw material unreeling device, the front surface of the proton exchange membrane released from the original roll shape is defined as an a surface in this embodiment, the other surface is provided with an original protective film P, and the surface provided with the original protective film P is defined as a B surface of the proton exchange membrane in this embodiment.
The embodiment provides a continuous CCM membrane electrode preparation method, which is implemented by the following technical scheme:
1) Stripping the original protective film P of the proton exchange film;
2) Attaching a self-adsorption bearing film S1 to the B surface of the proton exchange film;
3) Coating and drying an electrode layer A on the A surface of the proton exchange membrane;
4) Electrode layer detection and data recording are carried out on the electrode layer A;
5) Attaching a self-adsorption bearing film S2 to the A surface of the proton exchange film coated by the electrode layer A;
6) Printing a production information code of the electrode layer A at a designated position of the self-adsorption bearing film S2;
7) Stripping the self-absorption bearing film S1;
8) Coating an electrode layer B on the B surface of the proton exchange membrane;
9) Electrode layer detection and data recording are carried out on the electrode layer A;
10 Printing a production information code of the electrode layer B at a designated position of the self-absorption bearing film S2;
11 Winding to obtain the continuous CCM membrane electrode.
The proton exchange membrane is a perfluorinated sulfonic acid membrane adopted in the main flow technical scheme of the current fuel cell, has the characteristics of good chemical stability, good gas barrier property, high thermal stability, high conductivity and the like, and is one of key materials of membrane electrodes of the fuel cell.
The self-absorption carrier film S1/S2 is a polyolefin film with significant polarity, and in this embodiment, the self-absorption carrier film S1/S2 must also have characteristics of high transparency, high mechanical strength, high surface hardness, low friction coefficient, etc., and its thickness is 50um to 200um, surface hardness is 1H to 3H, and light transmittance is 80 to 99%.
The electrode layer detection device adopts a machine vision recognition system MVS.
The production information code is a production information record code generated by central control system software.
The secondary rechecking device adopts an FCT fuel cell working condition simulation test device.
The product identification code is a unique identification code of an MEA membrane electrode unit generated by central control system software.
Example 2
The preparation method of the continuous CCM membrane electrode comprises the following steps:
1) Stripping an original bottom film P of a proton exchange membrane B surface, attaching a self-adsorption bearing film S1, loading voltage and current intensity on the self-adsorption bearing film S1 when attaching, wherein the electric field polarity is positive or negative, and the self-adsorption bearing film S1 and the proton exchange membrane form an integral easy to convey after attaching;
wherein, the self-absorption carrier film S1 is subjected to surface purification and kept transparent/nearly transparent through at least one of surface activation treatment, physical processing treatment and chemical method treatment, and does not contain any adhesive or other substances causing adhesion and pollution;
wherein, the release action of the self-absorption carrier film S1 is sensed by the action sensor, and the operation precision is controlled by the accurate conveying system as follows: + -0.1 mm/step
2) Coating an electrode layer A on the A surface of the proton exchange membrane and drying;
the method comprises the steps of coating an electrode layer A by an A-side coating device, controlling and managing the A-side electrode layer coating device by a central control system, accurately controlling the longitudinal and transverse operation of a self-absorption bearing film S1 by an accurate conveying system, and drying a region where the coating of the electrode layer A is completed by a drying device;
3) After finishing coating and drying the electrode layer A, carrying out online detection on the coating result, scanning the coating effect through a machine vision recognition system MVS-1, and recording real-time detection data and results through a central control system;
4) Attaching a self-adsorption bearing film S2 to the A surface of the proton exchange film, which is detected by the electrode layer A, wherein when the self-adsorption bearing film S2 is attached, the voltage and the current intensity are 20KV/500 mA-50 KV/1000mA, the polarity of an electric field is positive or negative, and the self-adsorption bearing film S2 and the proton exchange film form an integral body which is easy to transport after the self-adsorption bearing film S2 is attached;
wherein, the self-absorption carrier film S1 is subjected to surface purification and kept transparent/nearly transparent through at least one of surface activation treatment, physical processing treatment and chemical method treatment, and does not contain any adhesive or other substances causing adhesion and pollution;
wherein, the release action of the self-absorption carrier film S2 is sensed by the action sensor, and the operation precision is controlled by the accurate conveying system as follows: + -0.1 mm/step
5) Printing a production information code of the electrode layer A at a designated position of the self-adsorption bearing film S2 after finishing lamination;
6) Stripping the self-adsorption bearing film S1 to expose the B surface of the proton exchange film, so that subsequent operation is facilitated;
7) Coating an electrode layer B on the B surface of the proton exchange membrane, and drying;
the electrode layer B is coated by adopting a B-side coating device, the B-side electrode layer coating device is controlled and managed through a central control system, the longitudinal and transverse operations of the self-absorption bearing film S2 are accurately controlled through an accurate conveying system, and the region coated by the electrode layer B is dried and dried through a drying device;
8) After finishing coating and drying the electrode layer B, carrying out online detection on the coating result, scanning the coating effect through a machine vision recognition system MVS-2, and recording real-time detection data and results through a central control system;
9) Printing a production information code of the electrode layer B at a designated position of the self-adsorption bearing film S2 after finishing lamination;
10 Coating and detecting the double-sided electrode layer, and winding the proton exchange membrane attached to the self-absorption carrier membrane S2 to obtain a continuous CCM membrane electrode coiled material and complete production data record.
Example 3
The present embodiment provides a method for manufacturing a continuous fuel cell CCM membrane electrode, in which a proton exchange membrane fuel cell adopted in a mainstream technical scheme is taken as an example for the fuel cell, and a specific embodiment is described, as shown in fig. 1, and the method comprises the following steps:
1-1: the original proton exchange membrane is released in a speed, tension and state controllable manner through an unreeling device, the original state of the proton exchange membrane is in a roll shape and is attached with an original bottom membrane P, and in the embodiment, the surface with the original bottom membrane P is defined as a B surface of the proton exchange membrane, and the other side is defined as an A surface;
1-2: before the coating of the starting electrode layer A, the original bottom film P of the surface B of the proton exchange membrane is peeled off, so that the self-adsorption bearing film S1 can be attached in the next procedure;
1-3: the method comprises the steps of attaching the B surface of a proton exchange membrane of a peeled original bottom membrane P to a self-absorption bearing membrane S1, attaching the proton exchange membrane to the surface of the self-absorption bearing membrane S1 through setting of a central control system and signal control of an inductor by an electrostatic loading device, wherein the width of the self-absorption bearing membrane S1 adopted in the embodiment is 20mm larger than that of the 2 side of the proton exchange membrane, the voltage and current intensity loaded during attaching are 20KV/500mA, the self-absorption bearing membrane S1 and the proton exchange membrane form an integral body easy to convey after attaching, and the self-absorption bearing membrane S1 adopts at least one of the modes of surface activation treatment, such as mechanical treatment, chemical method treatment, coating treatment and the like of a polyolefin film, so that the self-absorption bearing membrane S1 has high polarity and low viscosity, is easy to peel and does not damage the proton exchange membrane and an electrode layer, and in the embodiment, the self-absorption bearing membrane S1 has the thickness of 50 mu m, and the self-absorption bearing membrane forms an integral body easy to convey with the proton exchange membrane after attaching is completed;
1-4: the self-absorption carrier film S1 attached with the proton exchange film can achieve the conveying precision of transverse plus or minus 0.1mm deviation correction and longitudinal (linear conveying direction) +/-0.1 mm/step through an accurate conveying system, and the accurate coating of an electrode layer A of the A face of the proton exchange film can be carried out, wherein the coating mode comprises one of coating modes such as scraper type coating, silk screen coating, ink-jet type coating, gravure printing type coating, 3D printing type coating and the like, and the electrode layer A can be an anode catalyst layer or a cathode catalyst layer, and in the embodiment is an anode catalyst layer;
1-5: and drying the A surface of the proton exchange membrane coated with the electrode layer A by a drying device to volatilize solvent and moisture in the anode catalytic layer, so that the A surface of the proton exchange membrane is firmly adhered in a solidification state. In the embodiment, the treatment is carried out by adopting a hot air drying mode, the temperature of a hot air device is not lower than 85 ℃, and the hot air treatment time is not longer than 5 minutes;
1-6: after finishing coating and drying the electrode layer A, carrying out online detection on a coating result, scanning the coating effect through a machine vision recognition system MVS-1, and recording real-time detection data and a result through a central control system;
1-7: attaching a self-absorption bearing film S2, wherein the A surface of the proton exchange film which is detected by an electrode layer A is attached to the surface of the self-absorption bearing film S2 through the setting of a central control system and the signal control of an inductor, the width of the self-absorption bearing film S2 adopted in the embodiment is 25mm higher than that of the 2 side of the proton exchange film, at least 1 side is used for producing an information code recording area, the voltage and current intensity loaded during attaching are 20KV/500mA, the self-absorption bearing film S2 and the proton exchange film form an integral body which is easy to convey after attaching, the self-absorption bearing film S2 adopts a polyolefin film to be subjected to surface activation treatment, and the activation treatment mode comprises at least one of mechanical treatment, chemical method treatment, coating treatment and the like, so that the self-absorption bearing film S2 has high polarity and low viscosity, and is easy to peel off and not damage the proton exchange film and the electrode layer, and the proton exchange film form the integral body which is easy to convey after attaching;
1-8: printing a production information code of the electrode layer A at the position of the appointed 1 side of the self-adsorption bearing film S2 after finishing lamination, wherein the data of the production information code is consistent with a database of a central control system, and the production information code is easy to read at any time in subsequent production and detection procedures;
1-9: the self-absorption bearing film S1 is peeled on the B surface of the proton exchange film by a peeling device, the follow-up operation control is carried out on the self-absorption bearing film S2 by an accurate conveying system, and the peeled self-absorption bearing film S1 can be reused after being rolled and cleaned;
1-10: the self-adsorption carrier film S2 is controlled to run through the accurate conveying system, then the proton exchange film is conveyed in a turnover mode, and the coating and the treatment of the electrode layer B are easy to be carried out on the B surface of the proton exchange film;
1-11: the electrode layer B is coated on the B surface of the proton exchange membrane, the operation of the self-adsorption bearing membrane S2 is controlled through an accurate conveying system, so that the conveying precision of transverse +/-0.1 mm deviation correction and longitudinal (linear conveying direction) +/-0.1 mm/step can be achieved, the accurate coating of the electrode layer B on the B surface of the proton exchange membrane can be carried out, the coating modes comprise one of coating modes such as scraper coating, silk screen coating, ink-jet coating, gravure printing coating and 3D printing coating, the electrode layer B can be an anode catalyst layer or a cathode catalyst layer, and the electrode layer B can be a cathode catalyst layer in the embodiment;
1-12: and drying the B surface of the proton exchange membrane coated by the electrode layer B by a drying device to volatilize solvent and moisture in the cathode catalytic layer, so that a solidified state is formed and firmly attached to the B surface of the proton exchange membrane. In the embodiment, the treatment is carried out by adopting a hot air drying mode, the temperature of a hot air device is not lower than 85 ℃, and the hot air treatment time is not longer than 10 minutes;
1-13: after finishing coating and drying the electrode layer B, carrying out online detection on a coating result, scanning the coating effect through a machine vision recognition system MVS-2, and recording real-time detection data and a result through a central control system;
1-14: printing a production information code of the electrode layer B at the position of the appointed 1 side of the self-adsorption bearing film S2 after the detection of the electrode layer B is finished, wherein the data of the production information code is consistent with a database of a central control system, and the production information code is easy to read at any time in subsequent production and detection procedures;
1-15: coating, detecting, data recording and printing production information codes of the double-sided electrode layer are completed, and meanwhile, the proton exchange membrane attached to the self-absorption bearing membrane S2 is rolled up to obtain a continuous CCM membrane electrode coiled material and complete production data recording;
1-16: the application of the self-adsorption bearing film S1/S2 in the embodiment finishes the adsorption of the proton exchange film and the self-adsorption bearing film S1/S2 through the synchronous electric field loading of the static loading equipment, forms a whole easy to convey, fundamentally solves the technical problems of difficult conveying and processing caused by low mechanical strength of the proton exchange film and large swelling deformation coefficient after the catalyst is coated, effectively protects the proton exchange film and the electrode layer through the high-strength characteristic of the self-adsorption bearing film S1/S2 while realizing the high-speed manufacturing and processing of the roll to roll, and can ensure the improvement of the finished product rate of the membrane electrode due to the characteristics of nondestructive electrostatic adsorption and nondestructive lamination/glass;
1-17: according to the embodiment, the sensing devices and the signal acquisition devices distributed at each station of the whole system are used for providing running state signals for the central control system, and the running states of the system are managed by programmed instructions, so that an automatic and efficient manufacturing process is realized;
1-18: the special form self-absorption bearing film S1/S2 adopted in the embodiment has the blank reserved on the 2 side and the accurate conveying system precisely cooperate to realize high-precision transverse and longitudinal operation control;
1-19: in the self-adsorption bearing film S1/S2 in the embodiment, the designated position reserved on the 2 side records production information and detection data in the production process, is easy to read in subsequent processing, and is checked with a central control system, so that the electrode layer defect repair on-line can be completed, and the yield of the film electrode is greatly improved.
Example 4
The embodiment further provides a continuous MEA membrane electrode preparation method, which is implemented by the following technical scheme:
1) Reading information codes on the B surface of the continuous CCM membrane electrode, and repairing, coating and drying the partial area of the electrode layer B by a central control system instruction;
2) Sequentially attaching a gas diffusion layer B1 and a gas sealing layer B2 on the electrode layer B which is repaired;
3) Stripping the self-adsorption bearing film S2 from the continuous CCM film electrode which is bonded with the gas diffusion layer B1 and the gas sealing layer B2, and synchronously reading the information code produced by the electrode layer A;
4) The repair coating and drying are carried out on the local area of the electrode layer A by the central control system instruction;
5) Sequentially attaching a gas diffusion layer A1 and a gas sealing layer A2 on the A surface of the continuous CCM membrane electrode to obtain a continuous MEA membrane electrode;
6) Performing secondary rechecking on the continuous MEA membrane electrode after double-sided processing and bonding, and recording a detection result in a central control system database;
7) Printing the product identification code and synchronously cutting to obtain the MEA membrane electrode unit.
Wherein, gas diffusion layer b1=gas diffusion layer A1, gas seal layer b2=gas seal layer A2. The MEA membrane electrode monomer obtained after comprehensive detection is identified by a product identification code, so that the MEA membrane electrode monomer meeting the industrial standard is obtained, and the MEA membrane electrode monomer can be used for manufacturing fuel cell power stacks.
Example 5
The preparation method of the MEA membrane electrode in the embodiment comprises the following steps:
1) The continuous CCM membrane electrode coiled material is released and conveyed through the unreeling device, and the accurate conveying system can control the running precision of the CCM membrane electrode coiled material to achieve the conveying precision of transverse +/-0.1 mm deviation correction and longitudinal (linear conveying direction) +/-0.1 mm/step;
2) The CCM membrane electrode which carries out linear conveying carries out verification on the read detection data of the electrode layer B and the production data of a central control system through a production information code reading device to obtain a command signal for repairing the electrode layer B monomer with coating quality flaws, and carrying out uninterrupted conveying and passing on the electrode layer B monomer without the coating quality flaws;
3) The electrode layer B coating repairing device is used for performing positioning repairing on the area with the coating defect by the instruction of the central control system, wherein the repairing coating mode comprises one of coating modes such as doctor blade coating, silk screen coating, ink jet coating, gravure printing coating and 3D printing coating;
4) And drying the special electrode layer B monomer subjected to electrode layer repair by a drying device to volatilize the solvent and the moisture in the catalytic layer to form a cured state. In the embodiment, the treatment is carried out by adopting a hot air drying mode, the temperature of a hot air device is not lower than 85 ℃, and the hot air treatment time is not longer than 5 minutes; carrying out uninterrupted conveying and passing on the electrode layer B monomer which is not required to be repaired;
5) Delivering CCM membrane electrode coiled materials with the electrode layer B repaired to a bonding device for the gas diffusion layer B1 and the gas sealing layer B2, releasing the pre-prepared commercial gas diffusion layer B1 and the pre-prepared commercial gas sealing layer B2 coiled materials through an unreeling device, performing accurate alignment through a sensor, finishing pressing bonding through the bonding device, bonding the gas diffusion layer B1 and the gas sealing layer B2 to the electrode layer B, and carrying out reeling treatment on residual auxiliary materials of the bonded gas diffusion layer B1 and gas sealing layer B2 through a slitter edge reeling device;
6) The continuous CCM membrane electrode coiled material which is bonded by the gas diffusion layer B1 and the gas sealing layer B2 is subjected to turn-over conveying through an accurate conveying system;
7) The continuous CCM membrane electrode coiled material with the turn-over conveying is subjected to a production information code reading device, the read detection data of the electrode layer A is verified with the production data of a central control system, a command signal for repairing the electrode layer A monomer with coating quality flaws is obtained, and the electrode layer A monomer without the coating quality flaws is continuously conveyed and passed;
8) The continuous CCM membrane electrode coiled material attached with the gas diffusion layer B1 and the gas sealing layer B2 is effectively supported by mechanical strength and covered and protected by the electrode layer B, and then the self-absorption bearing membrane S2 is peeled off from the continuous CCM membrane electrode coiled material through a peeling device;
9) The electrode layer A coating repairing device is used for performing positioning repairing on the area with the coating defect by the instruction of the central control system, wherein the repairing coating mode comprises one of coating modes such as doctor blade coating, silk screen coating, ink jet coating, gravure printing coating and 3D printing coating;
10 Drying the special electrode layer A monomer after electrode layer repair by a drying device to volatilize solvent and water in the catalytic layer to form a solidification state. In the embodiment, the treatment is carried out by adopting a hot air drying mode, the temperature of a hot air device is not lower than 85 ℃, and the hot air treatment time is not longer than 5 minutes; carrying out uninterrupted conveying and passing on the electrode layer A monomer which is not required to be repaired;
11 Conveying CCM membrane electrode coiled materials with the electrode layer A repaired to a bonding device for the gas diffusion layer A1 and the gas sealing layer A2, releasing the coiled materials of the commercial gas diffusion layer A1 and the gas sealing layer A2 prepared in advance through an unreeling device, performing accurate alignment through a sensor, finishing pressing bonding through the bonding device, bonding the gas diffusion layer A1 and the gas sealing layer A2 to the electrode layer A, and carrying out reeling treatment on residual auxiliary materials of the gas diffusion layer A1 and the gas sealing layer A2 after bonding through a slitter edge reeling device;
12 After the gas diffusion layer and the gas sealing layer are bonded on the two sides, a continuous MEA membrane electrode is obtained, linear conveying is carried out, loading test is carried out through an FCT fuel cell working condition simulation test device, and test data are recorded into a central control software database to obtain final MEA membrane electrode monomer quality data;
13 Printing a product identification code at a designated position of an MEA membrane electrode unit by a product identification code printing device, and recording corresponding data into a central control system to form whole-course traceable membrane electrode quality control data;
14): and separating the MEA membrane electrode monomer which is processed on two sides and has unique product identification code from the continuous MEA membrane electrode by a synchronous cutting/cutting device to obtain the MEA membrane electrode monomer.
Example 6
The present embodiment provides a method for manufacturing an MEA membrane electrode of a continuous fuel cell, in which the fuel cell uses a proton exchange membrane fuel cell adopted in the mainstream technical scheme at present as an example, and meanwhile, the method is based on a continuous preparation process of a rolled CCM membrane electrode with stable quality and reliable production data, such as the continuous MEA membrane electrode preparation process shown in fig. 2, and performs the description of a specific embodiment, and includes the following steps:
2-1: the continuous CCM membrane electrode coiled material is released and conveyed through the unreeling device, and the accurate conveying system can control the running precision of the CCM membrane electrode coiled material to achieve the conveying precision of transverse +/-0.1 mm deviation correction and longitudinal (linear conveying direction) +/-0.1 mm/step;
2-2: the CCM membrane electrode which carries out linear conveying carries out verification on the read detection data of the electrode layer B and the production data of a central control system through a production information code reading device to obtain a command signal for repairing the electrode layer B monomer with coating quality flaws, and carrying out uninterrupted conveying and passing on the electrode layer B monomer without the coating quality flaws;
2-3: the electrode layer B coating repairing device is used for performing positioning repairing on the area with the coating defect by the instruction of the central control system, wherein the repairing coating mode comprises one of coating modes such as doctor blade coating, silk screen coating, ink jet coating, gravure printing coating and 3D printing coating;
2-4: and drying the special electrode layer B monomer subjected to electrode layer repair by a drying device to volatilize the solvent and the moisture in the catalytic layer to form a cured state. In the embodiment, the treatment is carried out by adopting a hot air drying mode, the temperature of a hot air device is not lower than 85 ℃, and the hot air treatment time is not longer than 5 minutes; carrying out uninterrupted conveying and passing on the electrode layer B monomer which is not required to be repaired;
2-5: delivering CCM membrane electrode coiled materials with the electrode layer B repaired to a bonding device for the gas diffusion layer B1 and the gas sealing layer B2, releasing the pre-prepared commercial gas diffusion layer B1 and the pre-prepared commercial gas sealing layer B2 coiled materials through an unreeling device, performing accurate alignment through a sensor, finishing pressing bonding through the bonding device, bonding the gas diffusion layer B1 and the gas sealing layer B2 to the electrode layer B, and carrying out reeling treatment on residual auxiliary materials of the bonded gas diffusion layer B1 and gas sealing layer B2 through a slitter edge reeling device;
2-6: the continuous CCM membrane electrode coiled material which is bonded by the gas diffusion layer B1 and the gas sealing layer B2 is subjected to turn-over conveying through an accurate conveying system;
2-7: the continuous CCM membrane electrode coiled material with the turn-over conveying is subjected to a production information code reading device, the read detection data of the electrode layer A is verified with the production data of a central control system, a command signal for repairing the electrode layer A monomer with coating quality flaws is obtained, and the electrode layer A monomer without the coating quality flaws is continuously conveyed and passed;
2-8: the continuous CCM membrane electrode coiled material attached with the gas diffusion layer B1 and the gas sealing layer B2 is effectively supported by mechanical strength and covered and protected by the electrode layer B, and then the self-absorption bearing membrane S2 is peeled off from the continuous CCM membrane electrode coiled material through a peeling device;
2-9: the electrode layer A coating repairing device is used for performing positioning repairing on the area with the coating defect by the instruction of the central control system, wherein the repairing coating mode comprises one of coating modes such as doctor blade coating, silk screen coating, ink jet coating, gravure printing coating and 3D printing coating;
2-10: and drying the special electrode layer A monomer subjected to electrode layer repair by a drying device to volatilize solvent and moisture in the catalytic layer to form a cured state. In the embodiment, the treatment is carried out by adopting a hot air drying mode, the temperature of a hot air device is not lower than 85 ℃, and the hot air treatment time is not longer than 5 minutes; carrying out uninterrupted conveying and passing on the electrode layer B monomer which is not required to be repaired;
2-11: delivering CCM membrane electrode coiled materials with the electrode layer A repaired to a bonding device for the gas diffusion layer A1 and the gas sealing layer A2, releasing the pre-prepared commercial gas diffusion layer A1 and the gas sealing layer A2 coiled materials through an unreeling device, performing accurate alignment through a sensor, finishing pressing bonding through the bonding device, bonding the gas diffusion layer A1 and the gas sealing layer A2 to the electrode layer A, and carrying out reeling treatment on residual auxiliary materials of the gas diffusion layer A1 and the gas sealing layer A2 after bonding through a slitter edge reeling device;
2-12: after the double-sided bonding of the gas diffusion layer and the gas sealing layer is completed, the continuous MEA membrane electrode is obtained for linear conveying, loading test is carried out by an FCT fuel cell working condition simulation test device, and test data are recorded into a central control software database to obtain final MEA membrane electrode monomer quality data;
2-13: the continuous MEA membrane electrode after the re-inspection is linearly conveyed, a product identification code is printed at a designated position of an MEA membrane electrode monomer through a product identification code printing device, and corresponding data are recorded into a central control system to form whole-course traceable membrane electrode quality control data;
2-14: the MEA membrane electrode monomer which is processed on two sides and has unique product identification codes is separated from the continuous MEA membrane electrode by a synchronous cutting/cutting device, so that the MEA membrane electrode monomer is obtained;
2-15: in the embodiment, in the subsequent processing of the continuous CCM membrane electrode coiled material, the CCM membrane electrode coiled material is supported and covered and protected by synchronous lamination of a gas diffusion layer and a gas sealing layer, and then the accurate conveying system finishes the conversion control of the conveying operation state through a specific conversion component in the process of stripping the self-absorption bearing film S2 and cooperatively operates with a central control system through a series of sensors;
2-16: in the embodiment, the unique product identification code is printed on the MEA film electrode monomer which completes the coating and attaching processing of the double-sided electrode layer by the instruction of the central control system, so that a product quality assurance system capable of being traced in the whole process is established.
The protection of the present invention is not limited to the above embodiments. Variations and advantages that would occur to one skilled in the art are included in the invention without departing from the spirit and scope of the inventive concept, and the scope of the invention is defined by the appended claims.
Claims (7)
1. The continuous preparation device for the membrane electrode of the fuel cell MEA is characterized by comprising a continuous preparation device for the membrane electrode of a coiled fuel cell CCM and a continuous preparation device for the membrane electrode of a sheet-shaped fuel cell MEA; wherein,
(1) The continuous preparation device of the CCM membrane electrode of the coiled fuel cell comprises the following components:
the raw material unreeling device is used for releasing the proton exchange membrane with controllable speed and tension;
the original bottom film P stripping device is arranged at the downstream of the raw material unreeling device and is used for stripping the original bottom film of the proton exchange membrane;
the self-adsorption bearing film S1 laminating device is arranged at the downstream of the original bottom film P stripping device, and is used for laminating the self-adsorption bearing film S1 on the B surface of the proton exchange film after the original bottom film is stripped;
The electrode layer A coating and drying device is arranged at the downstream of the self-absorption bearing film S1 attaching device and is used for coating an electrode layer A on the A surface of the proton exchange membrane;
the electrode layer coating quality detection device MVS-1 is arranged at the downstream of the electrode layer A coating and drying device and is used for detecting CCM membrane electrodes after the coating of the electrode layer A;
the self-adsorption bearing film S2 laminating device is arranged at the downstream of the electrode layer coating quality detection device MVS-1 and is used for laminating the self-adsorption bearing film S2 on the A surface of the proton exchange membrane subjected to the coating of the electrode layer A;
the self-adsorption bearing film S1 stripping device is arranged at the downstream of the self-adsorption bearing film S2 laminating device and is used for stripping the self-adsorption bearing film S1;
the electrode layer B coating and drying device is arranged at the downstream of the self-adsorption bearing film S1 stripping device and is used for coating the electrode layer B on the B surface of the proton exchange membrane;
the electrode layer coating quality detection device MVS-2 is arranged at the downstream of the electrode layer B coating and drying device and is used for detecting CCM membrane electrodes after finishing coating of the electrode layer on the B surface;
the continuous CCM membrane electrode coiled material winding device is arranged at the downstream of the electrode layer coating quality detection device MVS-2 and is used for winding the continuous CCM membrane electrode subjected to detection;
(2) The continuous preparation device for the membrane electrode of the sheet-shaped fuel cell MEA comprises the following components:
the continuous CCM membrane electrode coiled material unreeling device is used for releasing the continuous CCM membrane electrode coiled material with controllable speed and tension;
the electrode layer repairing and drying device-1 is arranged at the downstream of the continuous CCM membrane electrode coiled material unreeling device and is used for repairing and drying a specific area with electrode layer coating flaws according to a working instruction of the central control system;
a gas diffusion layer B1 and gas seal layer B2 bonding device which is arranged at the downstream of the electrode layer repairing and drying device-1 and is used for bonding the gas diffusion layer B1 and the gas seal layer B2 on the B surface of the continuous CCM membrane electrode;
the self-adsorption bearing film S2 stripping device is arranged at the downstream of the bonding device of the gas diffusion layer B1 and the gas sealing layer B2 and is used for separating the self-adsorption bearing film S2 from the continuous CCM membrane electrode coiled material;
the electrode layer repairing and drying device-2 is arranged at the downstream of the self-absorption bearing film S2 stripping device and is used for repairing and drying a specific area with electrode layer coating flaws according to a working instruction of the central control system;
a gas diffusion layer A1 and gas sealing layer A2 bonding device which is arranged at the downstream of the electrode layer repairing and drying device-2 and is used for bonding the gas diffusion layer A1 and the gas sealing layer A2 on the A surface of the continuous CCM membrane electrode;
The code spraying and synchronous cutting device is arranged at the downstream of the bonding device of the gas diffusion layer A1 and the gas sealing layer A2 and is used for printing a product identification code at a designated position of the continuous MEA membrane electrode unit and cutting the continuous MEA membrane electrode unit into the unit with the designated shape.
2. A method for continuously preparing a membrane electrode assembly of a fuel cell MEA, wherein the apparatus of claim 1 is used, said method comprising the steps of:
step one: stripping an original bottom film P on a B surface of a proton exchange membrane, and attaching a self-adsorption bearing film S1 on the B surface;
step two: coating an electrode layer A on the A surface of the proton exchange membrane;
step three: electrode layer detection is carried out on the surface A, and production data and detection results are recorded in a central control system database;
step four: attaching a self-adsorption bearing film S2 to the surface A;
step five: stripping the self-adsorption bearing film S1, and carrying out overturning conveying on the proton exchange film;
step six: coating an electrode layer B on the B surface;
step seven: electrode layer detection is carried out on the surface B, and production data and detection results are recorded in a central control system database;
step eight: rolling the detected proton exchange membrane with the double-sided coating electrode layers to obtain a continuous rolled fuel cell CCM membrane electrode;
Step nine: conveying the continuous coiled fuel cell CCM membrane electrode, positioning and attaching the gas diffusion layer B1 and the gas sealing layer B2 to the electrode layer B through a gas diffusion layer B1 and gas sealing layer B2 attaching device;
step ten: conveying the CCM membrane electrode with the gas diffusion layer B1 and the gas sealing layer B2 bonded, stripping the self-absorption bearing film S2 attached to the B surface of the CCM membrane electrode, and positioning and bonding the gas diffusion layer A1 and the gas sealing layer A2 to the electrode layer A through a gas diffusion layer A1 and gas sealing layer A2 bonding device;
step eleven: after the double-sided gas diffusion layer and the gas sealing layer are bonded, a continuous MEA membrane electrode is obtained;
step twelve: and printing a product identification code at a designated position of the MEA membrane electrode by a code spraying device, and cutting the continuous MEA membrane electrode subjected to detection and product identification code printing to obtain a sheet-shaped finished fuel cell MEA membrane electrode.
3. A continuous preparation device for a Membrane Electrode Assembly (MEA) of a sheet-like fuel cell, comprising:
the continuous CCM membrane electrode coiled material unreeling device is used for releasing the continuous CCM membrane electrode coiled material with controllable speed and tension;
The electrode layer repairing and drying device-1 is arranged at the downstream of the continuous CCM membrane electrode coiled material unreeling device and is used for repairing and drying a specific area with electrode layer coating flaws according to a working instruction of the central control system;
a gas diffusion layer B1 and gas seal layer B2 bonding device which is arranged at the downstream of the electrode layer repairing and drying device-1 and is used for bonding the gas diffusion layer B1 and the gas seal layer B2 on the B surface of the continuous CCM membrane electrode;
the self-adsorption bearing film S2 stripping device is arranged at the downstream of the bonding device of the gas diffusion layer B1 and the gas sealing layer B2 and is used for separating the self-adsorption bearing film S2 from the continuous CCM membrane electrode coiled material;
the electrode layer repairing and drying device-2 is arranged at the downstream of the self-absorption bearing film S2 stripping device and is used for repairing and drying a specific area with electrode layer coating flaws according to a working instruction of the central control system;
a gas diffusion layer A1 and gas sealing layer A2 bonding device which is arranged at the downstream of the electrode layer repairing and drying device-2 and is used for bonding the gas diffusion layer A1 and the gas sealing layer A2 on the A surface of the continuous CCM membrane electrode;
the code spraying and synchronous cutting device is arranged at the downstream of the bonding device of the gas diffusion layer A1 and the gas sealing layer A2 and is used for printing a product identification code at a designated position of the continuous MEA membrane electrode unit and cutting the continuous MEA membrane electrode unit into the unit with the designated shape.
4. A method for continuously preparing a membrane electrode assembly of a sheet-like fuel cell MEA, wherein the apparatus of claim 3 is used, said method comprising the steps of:
step I: conveying the continuous coiled fuel cell CCM membrane electrode, and positioning and attaching the gas diffusion layer B1 and the gas sealing layer B2 to the electrode layer B through a gas diffusion layer B1 and gas sealing layer B2 attaching device;
step II: conveying the CCM membrane electrode with the gas diffusion layer B1 and the gas sealing layer B2 bonded, stripping the self-absorption bearing film S2 attached to the B surface of the CCM membrane electrode, and positioning and bonding the gas diffusion layer A1 and the gas sealing layer A2 to the electrode layer A through a gas diffusion layer A1 and gas sealing layer A2 bonding device;
step III: after the double-sided gas diffusion layer and the gas sealing layer are bonded, a continuous MEA membrane electrode is obtained;
step IV: and printing a product identification code at a designated position of the MEA membrane electrode by a code spraying device, and cutting the continuous MEA membrane electrode subjected to detection and product identification code printing to obtain a sheet-shaped finished fuel cell MEA membrane electrode.
5. The apparatus as claimed in claim 1 or 3, further comprising: the FCT fuel cell working condition simulation test device is arranged at the downstream of the gas diffusion layer A1 and gas sealing layer A2 laminating device and is used for carrying out loading test on the continuous MEA membrane electrode monomers to obtain final quality data;
And/or the number of the groups of groups,
functional areas with the width of 10mm-30mm are arranged on two sides of the self-absorption bearing film S1/S2 and are used for printing visual production information codes;
and/or the number of the groups of groups,
further comprises: a production information code printing device a and a production information code printing device b;
the production information code printing device a is arranged at the downstream of the self-absorption bearing film S2 attaching device and is used for printing the production information code of the electrode layer A on the self-absorption bearing film S2;
the production information code printing device B is arranged at the downstream of the electrode layer coating quality detection device MVS-2 and is used for printing the production information code of the electrode layer B on the self-absorption bearing film S2;
and/or the number of the groups of groups,
further comprises: a production information code reading device-1 and a production information code reading device-2;
the production information code reading device-1 is arranged at the downstream of the unreeling device and is used for reading the production information code of the electrode layer B and outputting code reading data to the central control system;
the production information code reading device-2 is arranged at the downstream of the bonding device of the gas diffusion layer B1 and the gas sealing layer B2 and is used for reading the production information code of the electrode layer A and outputting code reading data to a central control system.
6. The method of claim 2 or 4, further comprising, after preparing the continuous roll-to-roll fuel cell CCM membrane electrode, the steps of:
Sorting the continuous coiled fuel cell CCM membrane electrodes, repairing according to the reading result of the production information code, and marking the membrane electrode units which cannot be repaired so as to be convenient to reject;
after the repaired continuous coiled fuel cell CCM membrane electrode is used for preparing an MEA membrane electrode, rechecking is carried out through an FCT fuel cell working condition simulation test device, so that the reliability and traceability of a repair result are ensured;
and/or the number of the groups of groups,
after conveying the continuous coiled fuel cell CCM membrane electrode, acquiring detection information of an electrode layer B through a production information code reading device-1, repairing and drying again;
after stripping the self-adsorption bearing film S2 attached to the B surface of the CCM film electrode, obtaining the detection information of the electrode layer A through a production information code reading device-2, repairing and drying again;
after the continuous MEA membrane electrode is obtained, loading test is carried out on the MEA membrane electrode through an FCT fuel cell working condition simulation test device, test data are transmitted to a central control system database, and unqualified MEA membrane electrode monomers are marked.
7. The method of claim 2, wherein the electrode layer coating method is doctor blade coating, screen printing, gravure printing, or spray coating;
And/or the number of the groups of groups,
in the step of attaching the proton exchange membrane to the self-absorption carrier membrane, the method comprises the following steps:
detecting the running state and position of the proton exchange membrane through a sensor;
static electricity is loaded on the self-adsorption bearing film, and the self-adsorption bearing film is attached to the proton exchange film through an attaching device; the self-adsorption bearing film outputs a high-voltage electric field through an electrostatic loading device, the proton exchange film is adsorbed on the self-adsorption bearing film, voltage, current intensity and output polarity are adjusted according to a preparation process, the voltage adjustment range is 20 KV-50 KV, the current adjustment intensity is 500 mA-1000 mA, and the output polarity is an anode or a cathode;
and/or the number of the groups of groups,
the step of coating the electrode layer A or the electrode layer B on the A surface or the B surface of the proton exchange membrane comprises the following steps:
the operation state of the self-adsorption bearing film S1 or the self-adsorption bearing film S2 is controlled by an accurate conveying system, the proton exchange film adsorbed on the self-adsorption bearing film S1 or the self-adsorption bearing film S2 is conveyed to an electrode layer coating device, the operation state is managed by a central control system, and meanwhile, the error value of a transmission system is detected and corrected by a photoelectric sensor;
coating operation of the electrode layer is carried out according to the instruction of the central control system within the set size range;
And/or the number of the groups of groups,
after coating the electrode layer on the two sides of the proton exchange membrane, detecting the electrode layer, including:
image acquisition is carried out on the electrode layer coating area through an electrode layer detection device, brightness signals are converted into digital signals, and judgment is carried out through software preset in a central control system;
coating the electrode layer with a CCM membrane electrode with a defect, marking a data generating system, and recording the data generating system in a visible information code;
after the detection of the electrode layer detection device is completed, a continuous CCM membrane electrode coiled material is obtained;
and/or the number of the groups of groups,
the self-absorption bearing film S1 or the self-absorption bearing film S2 is subjected to at least one of surface activation treatment, physical processing treatment and chemical method treatment to purify the surface and keep transparent or nearly transparent properties, so as to remove substances which can cause adhesion and pollution;
and/or the number of the groups of groups,
printing a production information code of the electrode layer A on the self-adsorption bearing film S2 after the self-adsorption bearing film S2 is attached to the surface A; and printing a production information code of the electrode layer B on the self-absorption bearing film S2 while detecting the electrode layer on the B surface.
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| CN111146450B (en) * | 2019-12-26 | 2020-12-22 | 一汽解放汽车有限公司 | Device and method for continuously preparing gas diffusion layer of fuel cell |
| CN111180771B (en) * | 2019-12-31 | 2021-04-20 | 无锡先导智能装备股份有限公司 | Coil stock laminating equipment and preparation system for membrane electrode |
| CN111477885B (en) * | 2020-04-10 | 2021-07-23 | 武汉理工氢电科技有限公司 | Production method of 3CCM |
| CN111755724B (en) * | 2020-06-01 | 2021-10-22 | 无锡先导智能装备股份有限公司 | Fuel cell membrane electrode production equipment |
| CN111653797B (en) * | 2020-06-22 | 2024-10-25 | 湖南隆深氢能科技有限公司 | Automatic packaging detection line for fuel cell membrane electrode |
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| CN112563532B (en) * | 2020-12-03 | 2021-09-14 | 中国科学院大连化学物理研究所 | Continuous packaging equipment for fuel cell membrane electrode sealing assembly |
| CN112713292B (en) * | 2020-12-25 | 2022-11-29 | 新源动力股份有限公司 | Hydrogen fuel cell membrane electrode assembly suitable for batch production and production process thereof |
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| CN113793961B (en) * | 2021-08-06 | 2023-03-10 | 江苏氢导智能装备有限公司 | Five-in-one forming equipment |
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