阅读说明：本技术 一种膜电极性能测试系统和方法 (Membrane electrode performance testing system and method ) 是由 靳宏建 蒋永伟 唐子威 刘冬安 于 2018-08-27 设计创作，主要内容包括：本申请公开了一种膜电极性能测试系统,其中包括负载、正极端板、负极端板、测试电堆和性能测试设备,测试电堆中包括至少两种膜电极,且在该测试电堆中膜电极与双极板交替排布；正极端板和负极端板分别与位于测试电堆两端的双极板相连,且正极端板和负极端板通过测试系统中的负载相连；性能测试设备与测试电堆中的膜电极相连,以对测试电堆中的膜电极的性能进行测试。测试电堆中膜电极和双极板交替排布的形式能够保证测试电堆中各膜电极的受力情况基本一致,从而保证各膜电极的测试条件基本一致,各膜电极性能对比结果更加可靠准确；对该测试电堆中的膜电极进行测试时,可以一次性地测试多种膜电极的性能,提高膜电极性能测试的效率。(The application discloses a membrane electrode performance test system, which comprises a load, an anode end plate, a cathode end plate, a test galvanic pile and performance test equipment, wherein the test galvanic pile comprises at least two membrane electrodes, and the membrane electrodes and bipolar plates are alternately arranged in the test galvanic pile; the positive end plate and the negative end plate are respectively connected with the bipolar plates at the two ends of the test pile, and the positive end plate and the negative end plate are connected through loads in the test system; the performance testing equipment is connected with the membrane electrode in the testing electric pile so as to test the performance of the membrane electrode in the testing electric pile. The alternate arrangement form of the membrane electrodes and the bipolar plates in the test stack can ensure that the stress conditions of each membrane electrode in the test stack are basically consistent, thereby ensuring that the test conditions of each membrane electrode are basically consistent and the performance comparison result of each membrane electrode is more reliable and accurate; when the membrane electrode in the test galvanic pile is tested, the performance of various membrane electrodes can be tested at one time, and the efficiency of membrane electrode performance test is improved.)

1. The membrane electrode performance test system is characterized by comprising a load, a positive electrode end plate, a negative electrode end plate, a test pile and performance test equipment;

the membrane electrodes and the bipolar plates in the test galvanic pile are alternately arranged, and the test galvanic pile comprises at least two membrane electrodes;

the positive end plate and the negative end plate are respectively connected with bipolar plates at two ends of the test pile; the anode end plate is connected with the cathode end plate through the load;

the performance test equipment is connected with the membrane electrode in the test galvanic pile and used for testing the performance of the membrane electrode.

2. The system of claim 1, wherein adjacent membrane electrodes arranged in the test stack are different kinds of membrane electrodes.

3. The system of claim 2, wherein the performance testing device is connected to a predetermined number of membrane electrodes;

the membrane electrodes in the preset number are arranged adjacently and are positioned in the middle of the test galvanic pile.

4. The system of claim 1 or 3, wherein the performance testing device is further configured to plot a performance curve of the membrane electrode.

5. The system of claim 1, wherein the test stack is an activated stack.

6. A membrane electrode performance testing method, comprising:

acquiring current density and voltage of a membrane electrode in the test galvanic pile; the test galvanic pile consists of membrane electrodes and bipolar plates which are alternately arranged, and the test galvanic pile comprises at least two membrane electrodes;

and drawing a performance curve of the membrane electrode according to the current density and the voltage of the membrane electrode.

7. The method according to claim 6, wherein adjacent membrane electrodes arranged in the test stack are different kinds of membrane electrodes.

8. The method of claim 7, wherein said obtaining current density and voltage of membrane electrodes in said test stack comprises:

acquiring current density and voltage of a preset number of membrane electrodes in the test galvanic pile; the membrane electrodes in the preset number are arranged adjacently and are positioned in the middle of the test galvanic pile.

9. The method according to claim 6, wherein the step of obtaining the current density and voltage of the membrane electrodes in the test stack is performed after the test stack has been subjected to an activation treatment.

Technical Field

The application relates to the field of fuel cells, in particular to a membrane electrode performance testing system and a membrane electrode performance testing method.

Background

Proton Exchange Membrane Fuel Cells (PEMFCs) are a zero-emission, high-efficiency, and high-power-density power generation device, and have a very broad development prospect in the aspect of new energy traffic power application. The membrane electrode in a PEMFC is the site where heterogeneous mass transport and electrochemical reflection occur, and can determine the performance, operating life, and development cost of the PEMFC.

At present, in the processes of preparing a membrane electrode and developing a PEMFC, the performance of various membrane electrodes is usually tested, so that the performance of the membrane electrode is continuously optimized in the process of preparing the membrane electrode according to the test result of the membrane electrode performance, or a membrane electrode with better selectivity is selected as a material for PEMFC development in the process of developing the PEMFC.

Disclosure of Invention

In order to solve the technical problem, the application provides a membrane electrode performance testing system, which can ensure that the performance of various membrane electrodes can be tested under the same testing condition, and further ensure that the performance comparison results of various membrane electrodes obtained based on the testing system are more accurate and reliable.

The embodiment of the application discloses the following technical scheme:

in a first aspect, an embodiment of the present application provides a membrane electrode performance test system, where the test system includes a load, a positive end plate, a negative end plate, a test stack, and a performance test device;

the membrane electrodes and the bipolar plates in the test galvanic pile are alternately arranged, and the test galvanic pile comprises at least two membrane electrodes;

the positive end plate and the negative end plate are respectively connected with bipolar plates at two ends of the test pile; the anode end plate is connected with the cathode end plate through the load;

the performance test equipment is connected with the membrane electrode in the test galvanic pile and used for testing the performance of the membrane electrode.

Optionally, the membrane electrodes arranged adjacent to each other in the test stack are different membrane electrodes.

Optionally, the performance testing equipment is connected with a preset number of membrane electrodes;

the membrane electrodes in the preset number are arranged adjacently and are positioned in the middle of the test galvanic pile.

Optionally, the performance testing equipment is further used for drawing a performance curve of the membrane electrode.

Optionally, the test electric pile is an activated electric pile.

In a second aspect, embodiments of the present application provide a membrane electrode performance testing method, including:

acquiring current density and voltage of a membrane electrode in the test galvanic pile; the test galvanic pile consists of membrane electrodes and bipolar plates which are alternately arranged, and the test galvanic pile comprises at least two membrane electrodes;

and drawing a performance curve of the membrane electrode according to the current density and the voltage of the membrane electrode.

Optionally, the membrane electrodes arranged adjacent to each other in the test stack are different membrane electrodes.

Optionally, the obtaining the current density and the voltage of the membrane electrode in the test stack includes:

acquiring current density and voltage of a preset number of membrane electrodes in the test galvanic pile; the membrane electrodes in the preset number are arranged adjacently and are positioned in the middle of the test galvanic pile.

Optionally, after the test stack is subjected to an activation treatment, the step of obtaining the current density and the voltage of the membrane electrode in the test stack is performed.

According to the technical scheme, the membrane electrode performance testing system provided by the embodiment of the application comprises a load, a positive electrode end plate, a negative electrode end plate, a testing electric pile and performance testing equipment, wherein the testing electric pile comprises at least two kinds of membrane electrodes, and the membrane electrodes and bipolar plates are alternately arranged in the testing electric pile; the positive end plate and the negative end plate are respectively connected with the bipolar plates at the two ends of the test pile, and the positive end plate and the negative end plate are connected through loads in the test system; the performance testing equipment is connected with the membrane electrode in the testing electric pile so as to test the performance of the membrane electrode in the testing electric pile. In the test system, the mode that the membrane electrodes and the bipolar plates in the test pile are alternately arranged is equivalent to that the monocells corresponding to various membrane electrodes are connected in series, when the test pile is fixedly connected by utilizing the anode end plate and the cathode end plate, the pressure exerted on the test pile by the anode end plate and the cathode end plate can be uniformly distributed on each monocell connected in series, namely, the stress conditions of each monocell connected in series in the test pile can be basically consistent, correspondingly, the stress conditions of each membrane electrode in the test pile can also be basically consistent, therefore, when the performance of each membrane electrode in the test pile is tested, the test conditions of each membrane electrode are basically consistent, and the performance comparison result of each membrane electrode is reliable and accurate; in addition, when the membrane electrode in the testing stack is tested, the performance of various membrane electrodes in the testing stack can be tested at one time, so that the steps of assembling single cells corresponding to different membrane electrodes for multiple times and testing the single cells corresponding to each membrane electrode for multiple times are omitted, and the efficiency of testing the performance of the membrane electrode is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a membrane electrode performance testing system according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a membrane electrode performance curve provided by an embodiment of the present application;

fig. 3 is a schematic flow chart of a membrane electrode performance testing method according to an embodiment of the present disclosure.

Detailed Description

In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Aiming at the problem that the consistency of the test conditions applied to various membrane electrodes cannot be ensured when the performance of the membrane electrodes is tested in the prior art, the embodiment of the application provides a membrane electrode performance testing system which can ensure that the performance of various membrane electrodes is tested under the same test conditions, so that the performance comparison results of various membrane electrodes obtained based on the testing system are more accurate and reliable.

The design concept of the membrane electrode performance test system provided by the embodiment of the present application is introduced below:

the membrane electrode performance test system provided by the embodiment of the application comprises a load, a positive end plate, a negative end plate, a test galvanic pile and performance test equipment, wherein the test galvanic pile comprises at least two kinds of membrane electrodes, and the membrane electrodes and bipolar plates are alternately arranged in the test galvanic pile; the positive end plate and the negative end plate are respectively connected with the bipolar plates at the two ends of the test pile, and the positive end plate and the negative end plate are connected through loads in the test system; the performance testing equipment is connected with the membrane electrode in the testing electric pile so as to test the performance of the membrane electrode in the testing electric pile.

In the membrane electrode performance test system, the mode that membrane electrodes and bipolar plates in a test stack are alternately arranged is equivalent to that monocells corresponding to a plurality of membrane electrodes are connected in series, when the test stack is fixedly connected by utilizing an anode end plate and a cathode end plate, the pressure exerted on the test stack by the anode end plate and the cathode end plate can be uniformly distributed on each monocell connected in series, so that the stress conditions of each monocell connected in series in the test stack can be basically consistent, correspondingly, the stress conditions of each membrane electrode in the test stack can be also basically consistent, and therefore, when the performance of each membrane electrode in the test stack is tested, the test conditions of each membrane electrode are ensured to be basically consistent, and the comparison result of each membrane electrode performance obtained based on the test system is reliable and accurate; in addition, when the membrane electrode in the testing stack is tested, the performance of various membrane electrodes in the testing stack can be tested at one time, so that the steps of assembling single cells corresponding to different membrane electrodes for multiple times and testing the single cells corresponding to each membrane electrode for multiple times are omitted, and the efficiency of testing the performance of the membrane electrode is improved.

The membrane electrode performance test system provided by the embodiment of the present application is introduced by way of example below:

referring to fig. 1, fig. 1 is a schematic structural diagram of a membrane electrode performance testing system provided in an embodiment of the present application, where the membrane electrode performance testing system includes a load 101, a positive electrode end plate 102, a negative electrode end plate 103, a testing stack 104, and a performance testing device 105.

Wherein, the test galvanic pile 104 comprises at least two membrane electrodes, and the membrane electrodes and the bipolar plates are alternately arranged in the test galvanic pile 104; the positive end plate 102 and the negative end plate 103 are respectively connected with bipolar plates at two ends of the test pile 104, namely the negative end plate 103 is connected with the bipolar plate 1041, and the positive end plate 102 is connected with the bipolar plate 1047; the positive terminal plate 102 is connected with the negative terminal plate 103 through a load 101; the performance testing apparatus 105 is connected to the membrane electrodes in the test cell stack 104 for testing the performance of the membrane electrodes.

The bipolar plates and the membrane electrodes in the test cell stack 104 are alternately arranged, and the alternately arranged bipolar plates and membrane electrodes can be regarded as connecting single cells corresponding to a plurality of membrane electrodes in series. As shown in fig. 1, the membrane electrode 1042 is sandwiched between the bipolar plate 1041 and the bipolar plate 1043, and the bipolar plate 1041, the membrane electrode 1042 and the bipolar plate 1043 together form a single cell corresponding to the membrane electrode 1042; the membrane electrode 1044 is sandwiched between the bipolar plate 1043 and the bipolar plate 1045, and the bipolar plate 1043, the membrane electrode 1044 and the bipolar plate 1045 jointly form a single cell corresponding to the membrane electrode 1044; the membrane electrode 1046 is sandwiched between the bipolar plate 1045 and the bipolar plate 1047, and the bipolar plate 1045, the membrane electrode 1046 and the bipolar plate 1047 together form a single cell corresponding to the membrane electrode 1046; the single cell corresponding to the membrane electrode 1042, the single cell corresponding to the membrane electrode 1044 and the single cell corresponding to the membrane electrode 1046 are connected in series to form a test cell stack 104.

As shown in fig. 1, in the test stack 104, the membrane electrode 1042 shares a bipolar plate 1043 with the membrane electrode 1044, the membrane electrode 1044 shares a bipolar plate 1045 with the membrane electrode 1046, and one shared bipolar plate 1043 and 1045 serves as a positive plate and the other serves as a negative plate.

It should be noted that the test stack 104 usually includes at least two membrane electrodes to be tested, and it should be understood that the number of the membrane electrodes included in the test stack 104 is not limited, i.e. the number of the membrane electrodes included in the test stack 104 is not limited, and may include any number of membrane electrodes, and the test stack may be a long stack including a large number of membrane electrodes or a short stack including a small number of membrane electrodes.

It should be noted that, in order to ensure that the test result is more accurate and can reflect the performance of various membrane electrodes, before the performance of the membrane electrode is tested, the activation process is usually performed on the test stack, so as to improve the activity and utilization rate of the catalyst in the membrane electrode, and enable the membrane electrode to exert the best and stable working state and performance.

It should be noted that, because the testing conditions of the membrane electrodes adjacent to the arrangement position are closer, in order to ensure that the testing conditions of the membrane electrodes to be tested are closer when testing the performance of the membrane electrodes of different types, the membrane electrodes adjacent to the arrangement position in the test stack are usually set as the membrane electrodes of different types.

It should be noted that the performance testing device 105 may be connected to any one or some membrane electrodes in the testing stack, the connection relationship of the performance testing device shown in fig. 1 is merely an example, and in practical applications, the performance testing device is generally connected to multiple membrane electrodes in the testing stack at the same time to obtain performance parameters of multiple membrane electrodes at the same time, specifically, the performance parameters of the membrane electrodes specifically include current density and voltage of the membrane electrodes.

In one possible implementation, the performance testing apparatus 105 is connected to a predetermined number of membrane electrodes in the test stack, which are arranged adjacent to each other and in an intermediate position in the test stack.

Because it is usually necessary to test the performance of a plurality of membrane electrodes simultaneously when testing the performance of the membrane electrode, so as to compare the performance of the plurality of membrane electrodes simultaneously during the testing process and improve the membrane electrode performance testing efficiency, the performance testing device 105 is usually connected to a predetermined number of membrane electrodes in the testing stack. And because the stress condition of the membrane electrode at the middle position in the test cell stack is generally the most uniform, when testing the performance of the membrane electrode, the performance testing device 105 is generally connected with a preset number of membrane electrodes at the middle position in the test cell stack, and because the types of the adjacent membrane electrodes in the test cell stack are generally different, the membrane electrode connected with the performance testing device 105 is the adjacent membrane electrode at the middle position.

For example, assuming that the test cell stack includes membrane electrodes No. 1 to 30 arranged in sequence, the preset number of membrane electrodes that can be connected by the performance test equipment is 5; in the test pile, 5 membrane electrodes in the middle are number 13-17 membrane electrodes, correspondingly, a performance test device is connected with the number 13-17 membrane electrodes, and in order to ensure that the performance test device can simultaneously test a plurality of membrane electrodes, the number 13-17 membrane electrodes are different membrane electrodes.

It should be noted that, after the performance testing device 105 acquires the performance parameters of the tested membrane electrode, the performance testing device 105 may also draw a performance curve of the membrane electrode according to the performance parameters of the membrane electrode. It is to be understood that if the performance testing apparatus 105 simultaneously tests the performance of a plurality of membrane electrodes, the performance testing apparatus 105 may simultaneously plot the performance curves corresponding to the plurality of membrane electrodes, as shown in fig. 2, which is an exemplary performance curve of a membrane electrode, and curve 1 and curve 2 correspond to the performance of different kinds of membrane electrodes, respectively.

In the membrane electrode performance test system provided by the embodiment of the application, the mode that membrane electrodes and bipolar plates in a test stack are alternately arranged is equivalent to that single cells corresponding to a plurality of membrane electrodes are connected in series, when the test stack is fixedly connected by utilizing a positive end plate and a negative end plate, the pressure exerted on the test stack by the positive end plate and the negative end plate can be uniformly distributed on each single cell connected in series, namely, the stress conditions of each single cell connected in series in the test stack can be basically consistent, and correspondingly, the stress conditions of each membrane electrode in the test stack can be basically consistent, so that when the performance of each membrane electrode in the test stack is tested, the test conditions of each membrane electrode are basically consistent, and the comparison result of each membrane electrode performance obtained based on the test system is reliable and accurate; in addition, when the membrane electrode in the testing stack is tested, the performance of various membrane electrodes in the testing stack can be tested at one time, so that the steps of assembling single cells corresponding to different membrane electrodes for multiple times and testing the single cells corresponding to each membrane electrode for multiple times are omitted, and the efficiency of testing the performance of the membrane electrode is improved.

In addition, the embodiment of the present application also provides a membrane electrode performance testing method, which is generally applied to a membrane electrode performance testing device, and referring to fig. 3, fig. 3 is a membrane electrode performance testing method provided by the embodiment of the present application, and as shown in fig. 3, the method includes:

step 301: acquiring current density and voltage of a membrane electrode in the test galvanic pile; the test electric pile is composed of membrane electrodes and bipolar plates which are alternately arranged, and the test electric pile comprises at least two membrane electrodes.

The performance test equipment is connected with a membrane electrode in the test galvanic pile to obtain performance parameters of the membrane electrode in the test galvanic pile, wherein the performance parameters of the membrane electrode specifically comprise current density and voltage of the membrane electrode.

The test cell stack is the test cell stack 104 in the membrane electrode performance test system provided in fig. 1, and includes at least two membrane electrodes, and the membrane electrodes and the bipolar plates included in the test cell stack are alternately arranged, and the membrane electrodes adjacent to each other in the arrangement position in the test cell stack are generally membrane electrodes of different types, and the structure of the test cell stack is specifically described in the above embodiments, and is not described herein again.

It should be noted that, when the performance testing apparatus actually works, the current density and the voltage of a preset number of membrane electrodes are generally obtained, and the preset number of membrane electrodes are arranged adjacently and at an intermediate position in the testing stack.

It should be understood that the preset number can be set according to practical situations, and the specific value of the preset number is not limited herein.

It should be noted that, in order to ensure that the test result is more accurate and can reflect the performance of various membrane electrodes, before the performance of the membrane electrode is tested, the activation process is usually performed on the test stack to improve the activity and utilization rate of the catalyst in the membrane electrode, so that the membrane electrode can exhibit the optimal and stable working state and performance, and after the activation process is performed on the test stack, the obtaining step 301 is performed.

Step 302: and drawing a performance curve of the membrane electrode according to the current density and the voltage of the membrane electrode.

And after the performance test equipment acquires the current density and the voltage of the membrane electrode, correspondingly drawing a performance curve corresponding to each membrane electrode according to the acquired current density and voltage.

It should be understood that if the performance testing device is connected to a plurality of membrane electrodes at the same time, the performance testing device simultaneously draws performance curves corresponding to the various membrane electrodes according to the acquired current densities and voltages of the plurality of membrane electrodes.

In the membrane electrode performance test method provided by the embodiment of the application, the current density and the voltage of a membrane electrode in a test galvanic pile are obtained, the test galvanic pile is composed of membrane electrodes and bipolar plates which are alternately arranged, and the test galvanic pile comprises at least two membrane electrodes; and drawing a performance curve of the membrane electrode according to the current density and the voltage of the membrane electrode. The mode that the membrane electrodes and the bipolar plates in the test pile are alternately arranged is equivalent to the mode that monocells corresponding to various membrane electrodes are connected in series, when the test pile is fixedly connected by utilizing an anode end plate and a cathode end plate, the pressure exerted on the test pile by the anode end plate and the cathode end plate can be uniformly distributed on each monocell connected in series, namely, the stress conditions of each monocell connected in series in the test pile can be basically consistent, correspondingly, the stress conditions of each membrane electrode in the test pile can also be basically consistent, therefore, when the performance of each membrane electrode in the test pile is tested, the test conditions of each membrane electrode are basically consistent, and the performance comparison results of each membrane electrode obtained based on the test system are reliable and accurate; in addition, when the membrane electrode in the testing stack is tested, the performance of various membrane electrodes in the testing stack can be tested at one time, so that the steps of assembling single cells corresponding to different membrane electrodes for multiple times and testing the single cells corresponding to each membrane electrode for multiple times are omitted, and the efficiency of testing the performance of the membrane electrode is improved.

It should be noted that, in the present specification, all the embodiments are described in a progressive manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus and system embodiments, since they are substantially similar to the method embodiments, they are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described embodiments of the apparatus and system are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

The above description is only one specific embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.