Detection methods and related devices

Abstract

The application discloses a detection method and related device, which can compress the parts to be detected by a compression device; in the process of compressing the parts, the current thickness of the parts is collected; when the current thickness reaches a preset thickness, the current pressure value of the compression device applied to the parts is obtained; and whether the thickness of the parts meets the requirements is detected according to the current pressure value. It can be seen that the application can compress multiple parts and then detect whether the thickness meets the requirements based on the current pressure value, without manual sampling detection, and the efficiency is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery, in particular to a detection method and related device. BACKGROUND

[0002] A fuel cell is stacked by a plurality of bipolar plates and membrane electrodes, and a sealing structure is arranged on the bipolar plate or the membrane electrode. During manufacturing of the fuel cell, the plurality of bipolar plates and the membrane electrodes are compressed first, and then the compressed bipolar plates and the membrane electrodes are fixed by a fastening structure to complete assembly. If the thickness dimension of the bipolar plate or the membrane electrode exceeds a tolerance, the compression rate of the sealing structure or the active area of the membrane electrode after assembly will not be within a design range, causing problems such as sealing failure, performance decline, or service life reduction. Therefore, it is necessary to detect the thickness of the bipolar plate and the membrane electrode. The current detection method mainly includes batch manual sampling and manual measurement. This method has low detection efficiency. SUMMARY

[0003] In view of the above problems, the present application provides a detection method and related device which can overcome the above problems or at least partially solve the above problems.

[0004] In a first aspect, a detection method comprises:

[0005] compressing a part to be detected by a compression device;

[0006] acquiring a current thickness of the part during compression of the part;

[0007] obtaining a current pressure value of the compression device applied to the part when the current thickness reaches a preset thickness;

[0008] detecting whether the thickness of the part meets a requirement according to the current pressure value.

[0009] In combination with the first aspect, in some optional embodiments, the part to be detected includes a bipolar plate and a membrane electrode, and the compression device is an electronic universal testing machine.

[0010] In combination with the previous embodiment, in some optional embodiments, the compression of the part to be detected by the compression device comprises:

[0011] determining a down pressure speed of the compression device according to an original thickness of the part before compression and a preset strain rate;

[0012] controlling a pressure head of the compression device to compress the part at the down pressure speed.

[0013] Optionally, in some optional embodiments, the acquisition of the current thickness of the part during compression of the part comprises:

[0014] obtaining a current position of a ram of the compression device during the compression of the part;

[0015] determining a current thickness of the part according to the current position.

[0016] Optionally, in some optional embodiments, before the detecting whether the thickness of the part meets the requirement according to the current pressure value, the method further comprises:

[0017] performing a corresponding compression simulation experiment according to the lower limit of the theoretical thickness and the upper limit of the theoretical thickness of the part in this detection respectively, to obtain a first curve corresponding to the lower limit of the theoretical thickness and a second curve corresponding to the upper limit of the theoretical thickness respectively, wherein the first curve and the second curve both record the relationship between the current thickness and the current pressure value of the part during the corresponding compression simulation experiment;

[0018] determining a pressure value range of the part when compressed to each current thickness according to the first curve and the second curve.

[0019] In combination with the previous embodiment, in some optional embodiments, the detecting whether the thickness of the part meets the requirement according to the current pressure value comprises:

[0020] detecting whether the thickness of the part meets the requirement according to the current pressure value and the pressure value range.

[0021] In combination with the previous embodiment, in some optional embodiments, the detecting whether the thickness of the part meets the requirement according to the current pressure value and the pressure value range comprises:

[0022] determining whether the current pressure value is within the pressure value range;

[0023] if the current pressure value is within the pressure value range, determining that the thickness of the part meets the requirement;

[0024] if the current pressure value is not within the pressure value range, determining that the thickness of the part does not meet the requirement.

[0025] In a second aspect, a detection device comprises a part compression unit, a thickness acquisition unit, a pressure acquisition unit and a thickness detection unit.

[0026] The part compression unit is configured to compress a part to be detected by a compression device.

[0027] The thickness acquisition unit is configured to acquire a current thickness of the part during the compression of the part.

[0028] The pressure acquisition unit is configured to obtain a current pressure value of the compression device applied to the part when the current thickness reaches the preset thickness.

[0029] The thickness detection unit is configured to detect whether the thickness of the part meets the requirement according to the current pressure value.

[0030] In a third aspect, a computer readable storage medium having stored thereon a program, the program being executed by a processor to implement the detection method of any of the above aspects.

[0031] In a fourth aspect, an electronic device includes at least one processor, and at least one memory connected to the processor via a bus; wherein the processor, the memory complete mutual communication through the bus; the processor is configured to call the program instruction in the memory, to execute the detection method of any of the above aspects.

[0032] By the above technical solution, the detection method and related device provided by the present application can compress the parts to be detected by a compression device; in the process of compressing the parts, the current thickness of the parts is acquired; when the current thickness reaches the preset thickness, the current pressure value of the compression device applied to the parts is obtained; and the thickness of the parts is detected according to the current pressure value to determine whether the thickness meets the requirement. As can be seen, the present application can compress multiple parts and then detect whether the thickness meets the requirement based on the current pressure value, without manual sampling detection, and the efficiency is higher.

[0033] The above description is only a summary of the technical solutions of the present application. In order to enable one skilled in the art to better understand the technical means of the present application, the content of the specification can be implemented, and in order to enable the above and other purposes, features and advantages of the present application to be more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0034] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Moreover, the same reference numerals in the attached drawings indicate the same or similar components. In the drawings:

[0035] Figure 1 A flowchart of the first detection method provided by the present application is shown;

[0036] Figure 2 A flowchart of the second detection method provided by the present application is shown;

[0037] Figure 3 a flow chart of a third detection method provided by the present application is shown;

[0038] Figure 4 a flow chart of a fourth detection method provided by the present application is shown;

[0039] Figure 5 a flow chart of a fifth detection method provided by the present application is shown;

[0040] Figure 6 a flow chart of a sixth detection method provided by the present application is shown;

[0041] Figure 7 a structural schematic diagram of a detection device provided by the present application is shown;

[0042] Figure 8 a structural schematic diagram of an electronic device provided by the present application is shown. DETAILED DESCRIPTION

[0043] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thoroughly and completely understood, and so that the scope of the present application will be complete and fully conveyed to those skilled in the art.

[0044] As shown in Figure 1 the present application provides a detection method, comprising: S100, S200, S300 and S400;

[0045] S100, compressing the part to be detected by a compression device;

[0046] Optionally, the present application does not make specific limitations on the compression device and the part, for example, in combination with the embodiment shown in Figure 1 in some optional embodiments, the part to be detected comprises bipolar plates and membrane electrodes, and the compression device is an electronic universal testing machine.

[0047] Optionally, the electronic universal testing machine, the bipolar plates and the membrane electrodes all belong to the well-known concepts in the art, and the present application does not make excessive description thereon, please refer to the relevant description in the art. It should be noted that: the present application can stack the bipolar plates and the membrane electrodes to be detected according to the assembly sequence on the designated position of the electronic universal testing machine, so as to facilitate the compression of the bipolar plates and the membrane electrodes by the electronic universal testing machine.

[0048] Optionally, the present application does not make specific limitation on the number of bipolar plates and membrane electrodes compressed each time, and a certain number of bipolar plates and membrane electrodes can be stacked according to the actual situation of the electronic universal testing machine. Generally speaking, the number of bipolar plates compressed each time is one more than the number of membrane electrodes.

[0049] Optionally, due to the characteristics of bipolar plates and membrane electrodes, they cannot be compressed too much, and the compression speed will also affect the performance of bipolar plates and membrane electrodes. That is, there are certain requirements for the compression rate and compression speed, and the compression rate is generally between 15% and 35%. In order to ensure the performance, the present application needs to determine a reasonable compression speed to ensure the high efficiency of the present application.

[0050] For example, as shown in Figure 2 In combination with the previous embodiment, in some optional embodiments, the S100 comprises S110 and S120.

[0051] S110, determining the down pressure speed of the compression device according to the original thickness of the part before compression and a preset strain rate;

[0052] Optionally, the original thickness of the part before compression of the present application can be the theoretical thickness, rather than the accurate thickness obtained by measurement. For example, the present application can obtain the original thickness according to the theoretical thickness of each bipolar plate and the theoretical thickness of each membrane electrode. Taking the example of stacking 11 bipolar plates and 10 membrane electrodes together, the original thickness is equal to the theoretical thickness of 11 bipolar plates plus the theoretical thickness of 10 membrane electrodes.

[0053] Optionally, the strain rate of the present application has a certain range of values, which is generally between 0.01 / second (s) and 0.1 / second (s), and the present application does not make limitation thereon. It should be noted that the product of the original thickness and the strain rate is equal to the down pressure speed. Taking the example of the original thickness of 10mm and the strain rate of 0.1 / second (s), the down pressure speed = original thickness x strain rate = 10mm x 0.1 / s = 1mm / s, that is, the compression amount per second is 1mm.

[0054] S120, controlling the compression head of the compression device to compress the part at the down pressure speed.

[0055] Optionally, as described above, after obtaining the down pressure speed, the compression device can be controlled to compress the part at the down pressure speed until the part is compressed to the specified thickness.

[0056] S200, collecting the current thickness of the part during the compression of the part;

[0057] Optionally, the parameters of the electronic universal testing machine are fixed, including the distance between the indenter and the fixed platform of the measured object at the origin, and the distance between the indenter and the fixed platform of the measured object at each position except the origin. That is, as long as the current position of the indenter is obtained, the current thickness of the part can be obtained. Therefore, the present application can continuously collect and record the positions of the indenter during compression.

[0058] That is, as shown in FIG. 1, in some optional embodiments, the S200 comprises S210 and S220. Figure 3

[0059] S210, obtaining the current position of the indenter of the compression device during compression of the part;

[0060] S220, determining the current thickness of the part according to the current position.

[0061] S300, obtaining the current pressure value applied by the compression device on the part when the current thickness reaches the preset thickness;

[0062] Optionally, the idea of the present application is to determine whether the thickness of the part meets the requirements according to the current pressure value when the part is compressed to the specified thickness. That is, the thickness of the part is indirectly reflected by the current pressure value, rather than directly measuring the thickness of the part. Because the measurement of thickness is not easy to measure and requires manual participation and checking, while the pressure value only needs to be accurately collected by a sensor. Therefore, the present application can collect the current pressure value applied by the compression device on the part when the part is compressed to the preset thickness, in order to facilitate the subsequent process.

[0063] S400, detecting whether the thickness of the part meets the requirements according to the current pressure value.

[0064] Optionally, the current pressure value is an actual value collected by a sensor or the like, which needs to be compared with the corresponding theoretical value to determine whether the thickness of the part meets the requirements. Therefore, the present application needs to establish a corresponding theoretical value range in advance.

[0065] That is, as shown in FIG. 1, in some optional embodiments, before the S400, the method further comprises S500 and S600. Figure 4

[0066] S500, respectively performing corresponding compression simulation experiments according to the lower limit of the theoretical thickness and the upper limit of the theoretical thickness of the part to be detected, and respectively obtaining a first curve corresponding to the lower limit of the theoretical thickness and a second curve corresponding to the upper limit of the theoretical thickness;

[0067] ​​The first curve and the second curve both record the relationship between the current thickness of the part and the current pressure value in the corresponding compression simulation experiment process.

[0068] S600, determining the pressure value range when the part is compressed to each current thickness according to the first curve and the second curve.

[0069] Optionally, the present application can determine the corresponding pressure value when the part is compressed to different thicknesses based on simulation experiments, thereby determining the relationship curve between the current thickness of the part and the pressure value. Generally speaking, the thicker the theoretical thickness of the part, the greater the pressure required for compression. Therefore, the first curve corresponding to the lower limit of the theoretical thickness of the part is below the second curve corresponding to the upper limit of the theoretical thickness (the first curve and the second curve are located in the same coordinate graph). The area enclosed by the first curve and the second curve can be understood as the pressure value range of the present application.

[0070] Optionally, as described above, the reference pressure value range is used to determine whether the current pressure value when compressed to the preset thickness is located within the pressure value range, thereby determining whether the thickness of the part meets the requirements. That is, as shown in the following embodiment, in some optional embodiments, the S400 comprises S410. Figure 5

[0071] S410, detecting whether the thickness of the part meets the requirements according to the current pressure value and the pressure value range.

[0072] Specifically, as shown in the following embodiment, in some optional embodiments, the S410 comprises S411, S412 and S413 in combination with the previous embodiment. Figure 6

[0073] S411, determining whether the current pressure value is located within the pressure value range;

[0074] If the current pressure value is located within the pressure value range, S412 is executed; if the current pressure value is not located within the pressure value range, S413 is executed.

[0075] S412, determining that the thickness of the part meets the requirements.

[0076] S413, determining that the thickness of the part does not meet the requirements.

[0077] Optionally, the thickness of the part not meeting the requirements can be understood as: the original thickness of the part does not meet the design requirements, either too thin or too thick.

[0078] As shown in the following embodiment, in some optional embodiments, the S400 comprises S420 in combination with the previous embodiment. Figure 7 ​​As shown, the present application provides a detection device, comprising: a part compression unit 100, a thickness acquisition unit 200, a pressure acquisition unit 300 and a thickness detection unit 400;

[0079] The part compression unit 100 is configured to compress a part to be detected by a compression device;

[0080] The thickness acquisition unit 200 is configured to acquire a current thickness of the part during compression of the part;

[0081] The pressure acquisition unit 300 is configured to obtain a current pressure value of the compression device applied to the part when the current thickness reaches a preset thickness;

[0082] The thickness detection unit 400 is configured to detect whether the thickness of the part meets a requirement according to the current pressure value.

[0083] Optionally, in some optional embodiments, the part compression unit 100 comprises: a speed determination subunit and a compression control subunit;

[0084] The speed determination subunit is configured to determine a down speed of the compression device according to an original thickness of the part before compression and a preset strain rate;

[0085] The compression control subunit is configured to control a compression head of the compression device to compress the part at the down speed.

[0086] Optionally, in some optional embodiments, the thickness acquisition unit 200 comprises: a position obtaining subunit and a thickness determination subunit;

[0087] The position obtaining subunit is configured to obtain a current position of the compression head of the compression device during compression of the part;

[0088] The thickness determination subunit is configured to determine the current thickness of the part according to the current position.

[0089] Optionally, in some optional embodiments, the device further comprises: a simulation experiment unit and a pressure range determination unit;

[0090] The simulation experiment unit is configured to, before detecting whether the thickness of the part meets the requirement according to the current pressure value, respectively perform corresponding compression simulation experiments according to the lower theoretical thickness limit and the upper theoretical thickness limit of the part in this detection, and respectively obtain a first curve corresponding to the lower theoretical thickness limit and a second curve corresponding to the upper theoretical thickness limit, wherein the first curve and the second curve both record the relationship between the current thickness of the part and the current pressure value in the corresponding compression simulation experiment.

[0091] The pressure range determination unit is configured to determine the pressure value range of the part when compressed to each current thickness according to the first curve and the second curve.

[0092] In combination with the previous embodiment, in some optional embodiments, the thickness detection unit 400 comprises a thickness detection subunit.

[0093] The thickness detection subunit is configured to detect whether the thickness of the part meets the requirement according to the current pressure value and the pressure value range.

[0094] In combination with the previous embodiment, in some optional embodiments, the thickness detection subunit comprises a range checking subunit, a first determination subunit and a second determination subunit.

[0095] The range checking subunit is configured to determine whether the current pressure value is located in the range of the pressure value range.

[0096] If the current pressure value is located in the range of the pressure value range, the first determination subunit is triggered; if the current pressure value is not located in the range of the pressure value range, the second determination subunit is triggered.

[0097] The first determination subunit is configured to determine that the thickness of the part meets the requirement.

[0098] The second determination subunit is configured to determine that the thickness of the part does not meet the requirement.

[0099] The application provides a computer readable storage medium, which stores a program, and the program is executed by a processor to implement the detection method.

[0100] As Figure 8As shown, the present application provides an electronic device 70, which comprises at least one processor 701, and at least one memory 702 connected with the processor 701, a bus 703; wherein the processor 701, the memory 702 complete mutual communication through the bus 703; the processor 701 is used to call the program instruction in the memory 702, to execute the detection method of any one described above.

[0101] In the present application, the relational terms such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0102] Each of the embodiments in the present specification is described in a relevant manner, and the same or similar parts between each of the embodiments can be referred to each other, and each of the embodiments focuses on the difference from other embodiments. Especially, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant part can be referred to the part of the description of the method embodiment.

[0103] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined in the present application can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown in the present application, but will conform to the widest scope consistent with the principles and novel features disclosed in the present application.

[0104] The above only describes the preferred embodiments of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A detection method, characterized in that, include: The parts to be tested are compressed using a compression device; the parts to be tested include bipolar plates and membrane electrodes. During the compression process of the part, the current thickness of the part is collected; When the current thickness reaches the preset thickness, the current pressure value applied to the part by the compression device is obtained; Based on the current pressure value and pressure range, check whether the thickness of the part meets the requirements; The process for obtaining the pressure value range is as follows: Based on the theoretical lower limit and theoretical upper limit of the part tested in this experiment, corresponding compression simulation experiments were conducted to obtain the first curve corresponding to the theoretical lower limit and the second curve corresponding to the theoretical upper limit. The first curve and the second curve both record the relationship between the current thickness of the part and the current pressure value during the corresponding compression simulation experiment. Based on the first curve and the second curve, determine the range of pressure values ​​required to compress the part to each current thickness.

2. The method according to claim 1, characterized in that, The compression device is an electronic universal testing machine.

3. The method according to claim 2, characterized in that, The compression of the part to be tested using a compression device includes: The pressing speed of the compression device is determined based on the original thickness of the part before compression and the preset strain rate. The pressure head of the compression device is controlled to compress the part according to the downward compression speed.

4. The method according to claim 2, characterized in that, The process of compressing the part, including collecting the current thickness of the part, includes: During the compression of the part, the current position of the pressure head of the compression device is obtained; Based on the current position, determine the current thickness of the part.

5. The method according to claim 1, characterized in that, The step of detecting whether the thickness of the part meets the requirements based on the current pressure value and the pressure value range includes: Determine whether the current pressure value is within the range of the pressure value; If the current pressure value is within the range of the pressure value, then the thickness of the part is determined to meet the requirements; If the current pressure value is not within the range of the pressure value, then the thickness of the part is determined to be non-compliant.

6. A detection device, characterized in that, include: The unit includes a parts compression unit, a thickness acquisition unit, a pressure acquisition unit, a thickness detection unit, a simulation experiment unit, and a pressure range determination unit. The component compression unit is used to compress the component to be tested using a compression device; the component to be tested includes a bipolar plate and a membrane electrode. The thickness acquisition unit is used to acquire the current thickness of the part during the compression process. The pressure acquisition unit is used to obtain the current pressure value applied to the part by the compression device when the current thickness reaches the preset thickness. The thickness detection unit is used to detect whether the thickness of the part meets the requirements based on the current pressure value and the pressure value range. The simulation experiment unit is used to perform corresponding compression simulation experiments based on the theoretical lower limit and theoretical upper limit of the part tested in this experiment, and to obtain a first curve corresponding to the theoretical lower limit and a second curve corresponding to the theoretical upper limit. The first curve and the second curve record the relationship between the current thickness of the part and the current pressure value during the corresponding compression simulation experiment. The pressure range determination unit is used to determine the pressure value range when the part is compressed to each current thickness based on the first curve and the second curve.

7. A computer-readable storage medium having a program stored thereon, characterized in that, When the program is executed by the processor, it implements the detection method as described in any one of claims 1 to 5.

8. An electronic device, characterized in that, The electronic device includes at least one processor, and at least one memory and a bus connected to the processor; wherein the processor and the memory communicate with each other through the bus; the processor is used to call program instructions in the memory to execute the detection method as described in any one of claims 1 to 5.

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