Air tightness detection device

Abstract

The utility model relates to an air tightness detection device, which is characterized in that a carrying mechanism carries a plurality of bipolar plates and a plurality of membrane electrodes alternately to a detection mechanism positioned at an initial detection station, and the detection mechanism carries out batch initial detection on the plurality of bipolar plates and the plurality of membrane electrodes at the same time. And if the batch of bipolar plates and membrane electrodes are qualified through initial inspection, the carrying mechanism carries all bipolar plates and membrane electrodes in the batch to a bipolar plate blanking station and a membrane electrode blanking station respectively to realize blanking. If the batch of bipolar plates and membrane electrodes in the batch are unqualified through the initial inspection, the carrying mechanism carries all bipolar plates and membrane electrodes in the batch to the bipolar plate cache station and the membrane electrode cache station respectively, and then the bipolar plates and membrane electrodes are transferred to the detection mechanisms of the bipolar plate reinspection station and the membrane electrode reinspection station respectively through the transfer mechanism; and single-piece reinspection is carried out to screen out bipolar plates and / or membrane electrodes with unqualified air tightness in the batch. Through the combination of batch initial detection and single-chip redetection, the number of times of airtightness detection can be significantly reduced while no leak detection is ensured, so that the detection efficiency can be significantly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to an air tightness detection device. Background Art

[0002] In the production process of fuel cells, the air tightness of key products such as bipolar plates, single cells and membrane electrode (MEA) needs to be tested before stacking the stack. At present, the air tightness test for bipolar plates, single cells and MEA adopts the form of single-piece testing and one-piece-one-test. As the production capacity increases, the single-piece testing method will eventually encounter bottlenecks no matter how the testing cycle is optimized, resulting in the detection efficiency being difficult to meet the demand. Utility Model Content

[0003] Based on this, it is necessary to provide an airtightness detection device that can significantly improve the detection efficiency in order to address the above problems.

[0004] An airtightness detection device, comprising:

[0005] Testing mechanisms are respectively set up at the initial inspection station, bipolar plate re-inspection station and membrane electrode re-inspection station;

[0006] A transport mechanism capable of alternately transporting the bipolar plates at the bipolar plate loading station and the membrane electrodes at the membrane electrode loading station to the detection mechanism located at the initial inspection station and stacking them; the transport mechanism can also transport the bipolar plates at the initial inspection station to the bipolar plate buffer station or the bipolar plate unloading station, and transport the membrane electrodes at the initial inspection station to the membrane electrode buffer station or the membrane electrode unloading station; and

[0007] The transfer mechanism is capable of transferring the bipolar plates in the bipolar plate buffer station to the detection mechanism in the bipolar plate re-inspection station, and transferring the membrane electrode in the membrane electrode buffer station to the detection mechanism in the membrane electrode re-inspection station; the transport mechanism is also capable of transporting the bipolar plates in the bipolar plate re-inspection station to the bipolar plate unloading station or the bipolar plate NG station, and transporting the membrane electrode in the membrane electrode re-inspection station to the membrane electrode unloading station or the membrane electrode NG station.

[0008] In one embodiment, the detection mechanism includes a base, an upper tooling plate, a lower tooling plate and a downward pressure driving member, the upper tooling plate is slidably installed on the base in a direction perpendicular to the bearing surface of the lower tooling plate, the lower tooling plate is slidably installed on the base in a direction parallel to the bearing surface of the lower tooling plate, the lower tooling plate can extend from the bottom of the upper tooling plate to receive the bipolar plate and / or membrane electrode, and can drive the carried bipolar plate and / or membrane electrode to slide to the bottom of the upper tooling plate, and the downward pressure driving member can drive the upper tooling plate to press the bipolar plate and / or membrane electrode carried on the lower tooling plate.

[0009] In one of the embodiments, the bipolar plate loading station, the membrane electrode loading station, the bipolar plate buffer station, the membrane electrode buffer station, the bipolar plate unloading station, the membrane electrode unloading station, the bipolar plate NG station and the membrane electrode NG station are all provided with material boxes.

[0010] In one embodiment, the transport mechanism includes a base, a four-axis robot and a transport suction cup, the four-axis robot is installed on the base, and the transport suction cup is installed on the moving end of the four-axis robot.

[0011] In one embodiment, the bipolar plate re-inspection station and the membrane electrode re-inspection station are spaced apart along a first direction, the transfer mechanism is arranged between the bipolar plate re-inspection station and the membrane electrode re-inspection station, the bipolar plate buffer station and the bipolar plate re-inspection station are distributed on the same side of the transfer mechanism and are arranged along a second direction perpendicular to the first direction, and the membrane electrode buffer station and the membrane electrode re-inspection station are distributed on the same side of the transfer mechanism and are arranged along the second direction.

[0012] In one embodiment, the transfer mechanism includes a linear transfer component, a support member, a transfer suction cup and a Z-axis drive member, the linear transfer component extends along the second direction, the support member can be slidably installed on the linear transfer component, the two Z-axis drive members are respectively arranged at the two ends of the support member in the first direction, and the moving end of each Z-axis drive member is provided with the transfer suction cup, under the drive of the linear transfer component and the Z-axis drive member, the two transfer suction cups can respectively absorb the bipolar plates of the bipolar plate cache station and the membrane electrode of the membrane electrode cache station and transfer them to the bipolar plate re-inspection station and the membrane electrode re-inspection station respectively.

[0013] In one of the embodiments, the initial inspection station, the bipolar plate loading station, the membrane electrode loading station, the bipolar plate buffer station, the membrane electrode buffer station, the bipolar plate unloading station, the membrane electrode unloading station, the bipolar plate NG station and the membrane electrode NG station are distributed on both sides of the bipolar plate re-inspection station and the membrane electrode re-inspection station along the second direction; the transfer mechanism can transfer the bipolar plates of the bipolar plate buffer station and the membrane electrode of the membrane electrode buffer station on either side to the bipolar plate re-inspection station and the membrane electrode re-inspection station respectively.

[0014] In one embodiment, the transport mechanisms are provided on both sides of the bipolar plate re-inspection station and the membrane electrode re-inspection station along the second direction, and each of the transport mechanisms is used to transport the bipolar plates and membrane electrodes located on the same side of the bipolar plate re-inspection station and the membrane electrode re-inspection station.

[0015] In one embodiment, two of the initial inspection stations are arranged on the same side of the bipolar plate re-inspection station and the membrane electrode re-inspection station along the second direction, and the two initial inspection stations are arranged at intervals along the first direction.

[0016] In one of the embodiments, the two initial inspection stations are spaced apart from the bipolar plate re-inspection station and the membrane electrode re-inspection station along the second direction, respectively; the bipolar plate loading station, the membrane electrode loading station and the bipolar plate NG station are sequentially arranged between one of the initial inspection stations and the bipolar plate re-inspection station, and the bipolar plate unloading station, the membrane electrode unloading station and the membrane electrode NG station are sequentially arranged between the other initial inspection station and the membrane electrode re-inspection station.

[0017] In the above-mentioned airtightness detection device, the conveying mechanism can first alternately convey multiple bipolar plates and multiple membrane electrodes to the detection mechanism located at the initial inspection station, and the detection mechanism simultaneously performs batch initial inspection on multiple bipolar plates and multiple membrane electrodes. If the batch initial inspection is qualified, the conveying mechanism will convey all the bipolar plates and membrane electrodes in the batch to the bipolar plate unloading station and the membrane electrode unloading station for unloading. If the batch initial inspection is unqualified, the conveying mechanism will first convey all the bipolar plates and membrane electrodes in the batch to the bipolar plate buffer station and the membrane electrode buffer station, and then the transfer mechanism will transfer them to the detection mechanisms of the bipolar plate re-inspection station and the membrane electrode re-inspection station, and perform single-piece re-inspection to screen out the bipolar plates and / or membrane electrodes with unqualified airtightness in the batch. By combining batch initial inspection with single-piece re-inspection, the number of airtightness inspections can be significantly reduced while ensuring that no inspections are missed, thereby significantly improving the inspection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the airtightness detection device in a preferred embodiment of the utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of the detection mechanism in the air tightness detection device shown;

[0021] Figure 3 for Figure 1 A schematic diagram of the structure of the transport mechanism in the air tightness detection device shown;

[0022] Figure 4 for Figure 1 The schematic diagram of the structure of the transfer mechanism in the air tightness detection device is shown. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0029] See also Figure 1 The airtightness detection device 100 in the preferred embodiment of the utility model includes a detection mechanism 110 , a conveying mechanism 120 and a transfer mechanism 130 .

[0030] The airtightness detection device 100 is provided with an initial inspection station 101, a bipolar plate re-inspection station 102, a membrane electrode re-inspection station 103, a bipolar plate loading station 104, a membrane electrode loading station 105, a bipolar plate buffer station 106, a membrane electrode buffer station 107, a bipolar plate unloading station 108, a membrane electrode unloading station 109, a bipolar plate NG station 1010 and a membrane electrode NG station 1011. In addition, the airtightness detection device 100 generally also includes an equipment large plate 140, and the above-mentioned stations are all arranged on the equipment large plate 140, and the detection mechanism 110, the conveying mechanism 120 and the transfer mechanism 130 are also installed on the equipment large plate 140.

[0031] The initial inspection station 101, the bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103 are all provided with a detection mechanism 110. The detection mechanisms 110 in the above three stations can adopt the same structure, and the detection mechanism 110 can perform airtightness detection operations on the bipolar plates, the membrane electrodes and the stacked assemblies formed by the alternating stacking of the bipolar plates and the membrane electrodes.

[0032] Please also read Figure 2 In this embodiment, the detection mechanism 110 includes a base 111, an upper tooling plate 112, a lower tooling plate 113 and a downward pressing driving member 114. The upper tooling plate 112 is perpendicular to the bearing surface of the lower tooling plate 113, that is, Figure 2The lower tooling plate 113 is slidably mounted on the base 111 in the up-down direction shown; the lower tooling plate 113 is parallel to the bearing surface of the lower tooling plate 113, that is, Figure 2 It is shown to be slidably installed on the base 111 in the horizontal direction; the lower tooling plate 113 can extend from the bottom of the upper tooling plate 112 to receive the bipolar plates and / or membrane electrodes, and can drive the carried bipolar plates and / or membrane electrodes to slide to the bottom of the upper tooling plate 112, and the downward pressure drive member 114 can drive the upper tooling plate 112 to press the bipolar plates and / or membrane electrodes carried on the lower tooling plate 113.

[0033] The base 111 plays a supporting role. The upper tooling plate 112 can be installed on the base 111 through a linear bearing, and the lower tooling plate 113 can be installed on the base 111 through a guide rail. The downward pressing drive member 114 can be a cylinder, which is connected to the upper tooling plate 112 in a transmission manner. When performing an airtightness test, the lower tooling plate 113 first extends from the bottom of the upper tooling plate 112 to avoid the upper tooling plate 112 from blocking its bearing surface, making it convenient to load the bipolar plates and membrane electrodes to the bearing surface of the lower tooling plate 113; after the lower tooling plate 113 is loaded, it can slide to the bottom of the upper tooling plate 112; then, the downward pressing drive member 114 drives the upper tooling plate 112 to press down, so that the bipolar plates, membrane electrodes or stacking components carried on the lower tooling plate 113 can be pressed against the lower tooling plate 113 and form a seal, thereby completing the airtightness test.

[0034] The transport mechanism 120 can grab and transport the bipolar plates and membrane electrodes to drive the bipolar plates and membrane electrodes to move between various stations. Figure 3 In this embodiment, the transport mechanism 120 includes a base 121, a four-axis robot 122 and a transport suction cup 123. The transport suction cup 123 is installed at the moving end of the four-axis robot 122 and is used to adsorb the bipolar plate or membrane electrode. The four-axis robot 122 has a high degree of freedom and can drive the transport suction cup 123 to move in a large range.

[0035] Please refer again Figure 1 , the transport mechanism 120 can alternately transport the bipolar plates of the bipolar plate loading station 104 and the membrane electrodes of the membrane electrode loading station 105 to the detection mechanism 110 located at the initial inspection station 101 and stack them. When stacking, one bipolar plate plus one membrane electrode is a group, until the cumulative stacked array reaches a preset value, and a seal can be formed between the bipolar plate and the membrane electrode during the stacking process. It can be seen that the detection mechanism 110 of the initial inspection station 101 can perform the first airtightness test on multiple bipolar plates and multiple membrane electrodes at the same time, that is, the detection mechanism 110 of the initial inspection station 101 can perform a batch initial inspection on a batch of multiple bipolar plates and multiple membrane electrodes. If the airtightness of any of the multiple bipolar plates and multiple membrane electrodes in the same batch is unqualified, the result of the batch initial inspection of the batch will be unqualified.

[0036] Furthermore, the transport mechanism 120 can also transport the bipolar plates of the initial inspection station 101 to the bipolar plate buffer station 106 or the bipolar plate unloading station 108 , and transport the membrane electrode of the initial inspection station 101 to the membrane electrode buffer station 107 or the membrane electrode unloading station 109 .

[0037] If the batch is qualified in the initial inspection, it means that the air tightness of all bipolar plates and membrane electrodes in the batch is qualified, so the bipolar plates and membrane electrodes in the batch can be transported by the transport mechanism 120 to the bipolar plate unloading station 108 and the membrane electrode unloading station 109 for unloading. If the batch is unqualified in the initial inspection, it means that the air tightness of at least some bipolar plates and / or at least some membrane electrodes in the batch is unqualified, and the air tightness of all bipolar plates and membrane electrodes in the batch is questionable. At this time, the transport mechanism 120 can first transport all the bipolar plates and membrane electrodes in the batch to the bipolar plate cache station 106 and the membrane electrode cache station 107 for caching, waiting for the subsequent single-piece re-inspection to screen out the bipolar plates and membrane electrodes with unqualified air tightness.

[0038] The transfer mechanism 130 can transfer the bipolar plate of the bipolar plate buffer station 106 to the detection mechanism 110 of the bipolar plate re-inspection station 102, and transfer the membrane electrode of the membrane electrode buffer station 107 to the detection mechanism 110 of the membrane electrode re-inspection station 103. Specifically, the detection mechanism 110 of the bipolar plate re-inspection station 102 can take on one bipolar plate at a time and perform airtightness detection, and the detection mechanism 110 of the membrane electrode re-inspection station 103 can take on one membrane electrode at a time and perform airtightness detection. In other words, the detection mechanisms 110 on the bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103 can respectively re-inspect the bipolar plate and the membrane electrode in a single piece, thereby screening out the bipolar plates and membrane electrodes that fail to meet the airtightness requirements.

[0039] Furthermore, the transport mechanism 120 can also transport the bipolar plates in the bipolar plate re-inspection station 102 to the bipolar plate unloading station 108 or the bipolar plate NG station 1010, and transport the membrane electrode in the membrane electrode re-inspection station 103 to the membrane electrode unloading station 109 or the membrane electrode NG station 1011. Specifically, for the bipolar plates and membrane electrodes that have passed the single-piece re-inspection, the transport mechanism 120 will transport them to the bipolar plate unloading station 108 and the membrane electrode unloading station 109 for unloading, and for the bipolar plates and membrane electrodes that have failed the single-piece re-inspection, the transport mechanism 120 will transport them to the bipolar plate NG station 1010 and the membrane electrode NG station 1011. It can be seen that by combining batch initial inspection with single-piece re-inspection, it is not necessary to perform airtightness inspection on each bipolar plate and membrane electrode one by one, which can prevent missed inspections and improve the inspection rhythm.

[0040] In this embodiment, the bipolar plate loading station 104, the membrane electrode loading station 105, the bipolar plate buffer station 106, the membrane electrode buffer station 107, the bipolar plate unloading station 108, the membrane electrode unloading station 109, the bipolar plate NG station 1010 and the membrane electrode NG station 1011 are all provided with a material box 150.

[0041] Specifically, the material box 150 on the bipolar plate loading station 104 is used to place the bipolar plates to be tested, the material box 150 on the membrane electrode loading station 105 is used to place the membrane electrode to be tested, the material box 150 on the bipolar plate buffer station 106 is used to place the bipolar plates with questionable air tightness, the material box 150 on the membrane electrode buffer station 107 is used to place the membrane electrode with questionable air tightness, the material box 150 on the bipolar plate unloading station 108 is used to place the bipolar plates with qualified air tightness, the material box 150 on the membrane electrode unloading station 109 is used to place the membrane electrode with qualified air tightness, the material box 150 on the bipolar plate NG station 1010 is used to place the bipolar plates with unqualified air tightness, and the material box 150 on the membrane electrode NG station 1011 is used to place the membrane electrode with unqualified air tightness. The material box 150 can stack the bipolar plates and membrane electrodes in an orderly manner, so as to facilitate taking and placing.

[0042] In addition, in the present embodiment, the bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103 are arranged at intervals along the first direction, and the transfer mechanism 130 is arranged between the bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103, the bipolar plate cache station 106 and the bipolar plate re-inspection station 102 are distributed on the same side of the transfer mechanism 130 and are arranged along a second direction perpendicular to the first direction, and the membrane electrode cache station 107 and the membrane electrode re-inspection station 103 are distributed on the same side of the transfer mechanism 130 and are arranged along the second direction.

[0043] The first direction refers to Figure 1 The up and down directions shown, the second direction refers to Figure 1 In the left and right directions shown. With such an arrangement, the distance between the bipolar plate buffer station 106 and the bipolar plate re-inspection station 102 can be relatively close, and the distance between the membrane electrode buffer station 107 and the membrane electrode re-inspection station 103 can be relatively close. Moreover, the transfer mechanism 130 is centrally arranged, and the distance between it and the bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103 is also roughly the same. Therefore, the moving path of the transfer mechanism 130 during operation can be effectively simplified and shortened, which helps to improve the rhythm of the transfer mechanism 130.

[0044] Please also read Figure 4In this embodiment, the transfer mechanism 130 includes a linear transfer component 131, a support member 132, a transfer suction cup 133 and a Z-axis driving component 134. The linear transfer component 131 extends along the second direction, the support member 132 is slidably installed on the linear transfer component 131, and the two Z-axis driving components 134 are respectively arranged at the two ends of the support member 132 in the first direction, and a transfer suction cup 133 is provided at the moving end of each Z-axis driving component 134.

[0045] The transfer suction cup 133 can absorb and release the bipolar plate and the membrane electrode. The bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103 are distributed on both sides of the linear transfer assembly 131 along the first direction. The linear transfer assembly 131 can drive the support member 132 to move back and forth along the second direction, thereby driving one of the transfer suction cups 133 on the support member 132 to move between the bipolar plate buffer station 106 and the bipolar plate re-inspection station 102, and driving the other transfer suction cup 133 to move between the membrane electrode buffer station 107 and the membrane electrode re-inspection station 103.

[0046] Driven by the linear transfer assembly 131 and the Z-axis drive 134, the two transfer suction cups 133 can simultaneously absorb the bipolar plate of the bipolar plate buffer station 106 and the membrane electrode of the membrane electrode buffer station 107, and transfer them to the bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103. Specifically, when the two transfer suction cups 133 are respectively moved to the top of the bipolar plate buffer station 106 and the membrane electrode buffer station 107, the corresponding Z-axis drive 134 drives the transfer suction cups 133 to descend until the two transfer suction cups 133 respectively absorb the bipolar plate and the membrane electrode. Next, the Z-axis driving member 134 drives the corresponding transfer suction cup 133 to rise, and the linear transfer assembly 131 drives the two transfer suction cups 133 to move above the bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103, respectively, and the corresponding Z-axis driving member 134 drives the transfer suction cup 133 to descend again until the two transfer suction cups 133 suck the bipolar plate and the membrane electrode and place them in the corresponding detection mechanism 110. The transfer mechanism 130 can transfer the bipolar plate and the membrane electrode to the detection mechanism 110 of the bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103 at the same time through one action, so it helps to improve the efficiency of single-piece re-inspection.

[0047] Please refer again Figure 1In the present embodiment, the bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103 are provided with the initial inspection station 101, the bipolar plate loading station 104, the membrane electrode loading station 105, the bipolar plate buffer station 106, the membrane electrode buffer station 107, the bipolar plate unloading station 108, the membrane electrode unloading station 109, the bipolar plate NG station 1010 and the membrane electrode NG station 1011 on both sides along the second direction; the transfer mechanism 130 can transfer the bipolar plates of the bipolar plate buffer station 106 and the membrane electrode of the membrane electrode buffer station 107 on either side to the bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103 respectively.

[0048] like Figure 1 As shown, with the bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103 along the central axis of the first direction as the boundary, the structures on the left and right sides are symmetrically distributed. The transport mechanism 120 can alternately transport the bipolar plates of the bipolar plate loading station 104 on the left and the membrane electrodes of the membrane electrode loading station 105 to the detection mechanism 110 located at the initial inspection station 101 on the left for batch initial inspection. For bipolar plates and membrane electrodes that fail the batch initial inspection, they can be first transported to the bipolar plate buffer station 106 and the membrane electrode buffer station 107 on the left for caching, and then transferred by the transfer mechanism 130 to the bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103 in the middle for single-piece re-inspection. It can be seen that the left and right sides can perform batch initial inspection operations at the same time, so the detection efficiency can be further improved.

[0049] Furthermore, in this embodiment, a transport mechanism 120 is provided on both sides of the bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103 along the second direction, and each transport mechanism 120 is used to transport the bipolar plates and membrane electrodes located on the same side of the bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103. In this way, the running track of a single transport mechanism 120 can be significantly shortened, thereby helping to improve the working rhythm of the transport mechanism 120.

[0050] In addition, in this embodiment, two initial inspection stations 101 are arranged on the same side of the bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103 along the second direction, and the two initial inspection stations 101 are arranged at intervals along the first direction.

[0051] Since each batch initial inspection takes a long time, during the batch initial inspection at one of the initial inspection stations 101, the transport mechanism 120 can unload multiple bipolar plates and multiple membrane electrodes that have passed the batch initial inspection at another initial inspection station 101, or transfer multiple bipolar plates and multiple membrane electrodes that have failed the batch initial inspection to the bipolar plate buffer station 106 and the membrane electrode buffer station 107 for buffering. In addition, multiple bipolar plates and multiple membrane electrodes of the next batch can be transported to the vacant initial inspection station 101 for stacking in preparation for batch initial inspection. In this cycle, the idle time of the airtightness detection device 100 can be shortened, thereby further improving the detection efficiency.

[0052] Furthermore, in the present embodiment, two initial inspection stations 101 are spaced apart from the bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103 along the second direction, wherein a bipolar plate loading station 104, a membrane electrode loading station 105 and a bipolar plate NG station 1010 are sequentially arranged between one initial inspection station 101 and the bipolar plate re-inspection station 102, and a bipolar plate unloading station 108, a membrane electrode unloading station 109 and a membrane electrode NG station 1011 are sequentially arranged between the other initial inspection station 101 and the membrane electrode re-inspection station 103.

[0053] Such an arrangement can make the layout of multiple stations reasonable, the distance between the bipolar plate re-inspection station 102 and the bipolar plate NG station 1010 is relatively close, and the distance between the membrane electrode re-inspection station 103 and the membrane electrode NG station 1011 is also relatively close, so it is convenient to quickly transfer the bipolar plate and membrane electrode with unqualified airtightness to the bipolar plate NG station 1010 and the membrane electrode NG station 1011. In addition, since the bipolar plate loading station 104 and the membrane electrode loading station 105 are located on the same side and on the other side opposite to the bipolar plate unloading station 108 and the membrane electrode unloading station 109 on the other side along the first direction, when loading and unloading the bipolar plate and the membrane electrode, the moving path of the conveying mechanism 120 can be significantly shortened, thereby improving the beat of the conveying mechanism 120.

[0054] In the above-mentioned air tightness detection device 100, the conveying mechanism 120 can first alternately convey multiple bipolar plates and multiple membrane electrodes to the detection mechanism 110 located at the initial inspection station 101, and the detection mechanism 110 simultaneously performs batch initial inspection on multiple bipolar plates and multiple membrane electrodes. If the batch initial inspection is qualified, the conveying mechanism 120 will convey the batch of bipolar plates and membrane electrodes to the bipolar plate unloading station 108 and the membrane electrode unloading station 109 for unloading. If the batch initial inspection is unqualified, the conveying mechanism 120 will first convey all the bipolar plates and membrane electrodes in the batch to the bipolar plate buffer station 106 and the membrane electrode buffer station 107, and then the transfer mechanism 130 will transfer them to the detection mechanism 110 of the bipolar plate re-inspection station 102 and the membrane electrode re-inspection station 103, and perform single-piece re-inspection to screen out the bipolar plates and / or membrane electrodes in the batch that fail to meet the air tightness requirements. By combining batch initial inspection with single-piece re-inspection, the number of airtightness tests can be significantly reduced while ensuring that no inspections are missed, thereby significantly improving the inspection efficiency.

[0055] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An airtightness detection device, characterized in that: include: Testing mechanisms are respectively set up at the initial inspection station, bipolar plate re-inspection station and membrane electrode re-inspection station; A transport mechanism capable of alternately transporting the bipolar plates at the bipolar plate loading station and the membrane electrodes at the membrane electrode loading station to the detection mechanism located at the initial inspection station and stacking them; the transport mechanism can also transport the bipolar plates at the initial inspection station to the bipolar plate buffer station or the bipolar plate unloading station, and transport the membrane electrodes at the initial inspection station to the membrane electrode buffer station or the membrane electrode unloading station; and The transfer mechanism is capable of transferring the bipolar plates in the bipolar plate buffer station to the detection mechanism in the bipolar plate re-inspection station, and transferring the membrane electrode in the membrane electrode buffer station to the detection mechanism in the membrane electrode re-inspection station; the transport mechanism is also capable of transporting the bipolar plates in the bipolar plate re-inspection station to the bipolar plate unloading station or the bipolar plate NG station, and transporting the membrane electrode in the membrane electrode re-inspection station to the membrane electrode unloading station or the membrane electrode NG station.

2. The airtightness detection device according to claim 1, characterized in that: The detection mechanism includes a base, an upper tooling plate, a lower tooling plate and a downward pressure driving member. The upper tooling plate is slidably installed on the base in a direction perpendicular to the bearing surface of the lower tooling plate, and the lower tooling plate is slidably installed on the base in a direction parallel to the bearing surface of the lower tooling plate. The lower tooling plate can extend from the bottom of the upper tooling plate to receive the bipolar plate and / or membrane electrode, and can drive the carried bipolar plate and / or membrane electrode to slide to the bottom of the upper tooling plate. The downward pressure driving member can drive the upper tooling plate to press the bipolar plate and / or membrane electrode carried on the lower tooling plate.

3. The airtightness detection device according to claim 1, characterized in that: The bipolar plate loading station, the membrane electrode loading station, the bipolar plate buffer station, the membrane electrode buffer station, the bipolar plate unloading station, the membrane electrode unloading station, the bipolar plate NG station and the membrane electrode NG station are all provided with material boxes.

4. The airtightness detection device according to claim 1, characterized in that: The transport mechanism comprises a base, a four-axis robot and a transport suction cup. The four-axis robot is installed on the base, and the transport suction cup is installed on the moving end of the four-axis robot.

5. The airtightness detection device according to claim 1, characterized in that: The bipolar plate re-inspection station and the membrane electrode re-inspection station are arranged at intervals along a first direction, the transfer mechanism is arranged between the bipolar plate re-inspection station and the membrane electrode re-inspection station, the bipolar plate buffer station and the bipolar plate re-inspection station are distributed on the same side of the transfer mechanism and are arranged along a second direction perpendicular to the first direction, and the membrane electrode buffer station and the membrane electrode re-inspection station are distributed on the same side of the transfer mechanism and are arranged along the second direction.

6. The airtightness detection device according to claim 5, characterized in that: The transfer mechanism includes a linear transfer component, a support member, a transfer suction cup and a Z-axis drive member. The linear transfer component extends along the second direction. The support member can be slidably installed on the linear transfer component. The two Z-axis drives are respectively arranged at the two ends of the support member in the first direction, and the moving end of each Z-axis drive member is provided with the transfer suction cup. Driven by the linear transfer component and the Z-axis drive member, the two transfer suction cups can respectively absorb the bipolar plates of the bipolar plate cache station and the membrane electrode of the membrane electrode cache station and transfer them to the bipolar plate re-inspection station and the membrane electrode re-inspection station respectively.

7. The airtightness detection device according to claim 5, characterized in that: The initial inspection station, the bipolar plate loading station, the membrane electrode loading station, the bipolar plate buffer station, the membrane electrode buffer station, the bipolar plate unloading station, the membrane electrode unloading station, the bipolar plate NG station and the membrane electrode NG station are distributed on both sides of the bipolar plate re-inspection station and the membrane electrode re-inspection station along the second direction; the transfer mechanism can transfer the bipolar plates of the bipolar plate buffer station and the membrane electrode of the membrane electrode buffer station on either side to the bipolar plate re-inspection station and the membrane electrode re-inspection station respectively.

8. The airtightness detection device according to claim 7, characterized in that: The transport mechanisms are arranged on both sides of the bipolar plate re-inspection station and the membrane electrode re-inspection station along the second direction, and each transport mechanism is used to transport the bipolar plates and membrane electrodes located on the same side of the bipolar plate re-inspection station and the membrane electrode re-inspection station.

9. The airtightness detection device according to claim 7, characterized in that: Two of the initial inspection stations are arranged on the same side of the bipolar plate re-inspection station and the membrane electrode re-inspection station along the second direction, and the two initial inspection stations are arranged at intervals along the first direction.

10. The airtightness detection device according to claim 9, characterized in that: The two initial inspection stations are respectively arranged with the bipolar plate re-inspection station and the membrane electrode re-inspection station at intervals along the second direction, wherein the bipolar plate loading station, the membrane electrode loading station and the bipolar plate NG station are arranged in sequence between one of the initial inspection stations and the bipolar plate re-inspection station, and the bipolar plate unloading station, the membrane electrode unloading station and the membrane electrode NG station are arranged in sequence between the other initial inspection station and the membrane electrode re-inspection station.

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