Bipolar plate detection equipment

Abstract

The embodiment of the utility model provides bipolar plate detection equipment, and relates to the technical field of fuel cells. The bipolar plate detection equipment comprises an equipment main body, a first detection device, a second detection device and a driving device, a detection platform is arranged on the equipment main body, and the first detection device comprises a first airtightness test board and a first resistance test board; the second detection device comprises a second airtight test board and a second resistance test board; the driving device is arranged on the detection platform and is connected with the second airtight test plate; under the condition that the second resistance test board and the first resistance test board press the bipolar plate at the same time, one side of the bipolar plate and the air groove and the cooling groove respectively form an air sealing cavity and a cooling sealing cavity, and the other opposite side of the bipolar plate and the hydrogen groove form a hydrogen sealing cavity. According to the bipolar plate detection equipment, the contact resistance, the voltage drop and the air tightness of the bipolar plate can be detected, the detection efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a bipolar plate detection device. Background Art

[0002] Bipolar plates are the core components of fuel cells. They play the roles of mass transfer, conductivity, heat dissipation and support in fuel cells, and have a very important impact on the performance of fuel cells. Therefore, in the design of bipolar plates, it is necessary to consider the impact of plate structure, flow channel size, packaging pressure, and sealing design on the conductivity and material transfer of the plates. To determine these parameters, contact resistance tests, pressure drop tests, and air tightness tests are usually performed on the bipolar plates to ensure that the performance of the bipolar plates meets the requirements.

[0003] At present, the existing technology usually uses different testing equipment to perform contact resistance testing, voltage drop testing and air tightness testing respectively, resulting in low performance testing efficiency of bipolar plates and high costs. Utility Model Content

[0004] The utility model aims to provide a bipolar plate detection device, which can detect the contact resistance, voltage drop and air tightness of the bipolar plate through one device, thereby improving the detection efficiency and reducing the cost.

[0005] The embodiment of the utility model is achieved as follows:

[0006] In a first aspect, the utility model provides a bipolar plate detection device, comprising:

[0007] An equipment body, wherein a detection platform is provided on the equipment body;

[0008] A first detection device, the first detection device comprises a first airtight test board and a first resistance test board, the first airtight test board is arranged on the detection platform, the first airtight test board is provided with an air slot and a first air inlet and a first air outlet simultaneously connected to the air slot, and is also provided with a cooling slot and a second air inlet and a second air outlet simultaneously connected to the cooling slot; the first resistance test board is arranged on a side of the first airtight test board away from the detection platform;

[0009] a second detection device, the second detection device comprising a second airtight test board and a second resistance test board, the second airtight test board being spaced apart from the first airtight test board on a side away from the detection platform and having a hydrogen tank and a third air inlet and a third air outlet connected to the hydrogen tank; the second resistance test board being disposed on a side of the second airtight test board close to the first airtight test board; and

[0010] A driving device is arranged on the detection platform and connected to the second airtight test plate, and is used for driving the second airtight test plate to move toward the first airtight test plate. When the second resistance test plate and the first resistance test plate press the bipolar plate at the same time, one side of the bipolar plate and the air groove and the cooling groove form an air sealing cavity and a cooling sealing cavity respectively, and the other side of the bipolar plate opposite to the hydrogen groove forms a hydrogen sealing cavity.

[0011] In an optional embodiment, the air slot includes a first air slot and a second air slot, the cooling slot includes a first cooling slot and a second cooling slot, the first air slot and the first cooling slot are respectively arranged at two ends of the first airtight test plate with the second air slot and the second cooling slot; the first air inlet is communicated with the first air slot, and the first air outlet is communicated with the second air slot; the second air inlet is communicated with the first cooling slot, and the second air outlet is communicated with the second cooling slot;

[0012] The hydrogen tank includes a first hydrogen tank and a second hydrogen tank respectively arranged at two ends of the second airtight test plate, the third gas inlet is connected to the first hydrogen tank, and the third gas outlet is connected to the second hydrogen tank.

[0013] In an optional embodiment, the first airtight test plate is further provided with a first sealing groove and a second sealing groove, the first sealing groove is arranged around the periphery of the first air groove and the first cooling groove at the same time, and the second sealing groove is arranged around the periphery of the second air groove and the second cooling groove at the same time; the first detection device further includes a first sealing ring and a second sealing ring, the first sealing ring is arranged in the first sealing groove, and the second sealing ring is arranged in the second sealing groove;

[0014] The second airtight test plate is also provided with a third sealing groove and a fourth sealing groove, wherein the third sealing groove is arranged around the periphery of the first hydrogen tank, and the fourth sealing groove is arranged around the periphery of the second hydrogen tank; the second detection device also includes a third sealing ring and a fourth sealing ring, wherein the third sealing ring is arranged in the third sealing groove, and the fourth sealing ring is arranged in the fourth sealing groove.

[0015] In an optional embodiment, the first detection device further includes a first air inlet connector, a second air inlet connector, a first air outlet connector and a second air outlet connector, the first air inlet connector is arranged at the first air inlet, the second air inlet connector is arranged at the second air inlet, the first air outlet connector is arranged at the first air outlet, and the second air outlet connector is arranged at the second air outlet;

[0016] The second detection device also includes a third air inlet connector and a third air outlet connector. The third air inlet connector is arranged at the third air inlet, and the third air outlet connector is arranged at the third air outlet.

[0017] In an optional embodiment, the first resistance test board is provided with a first wiring terminal and a second wiring terminal at both ends, and the second resistance test board is provided with a third wiring terminal and a fourth wiring terminal at both ends;

[0018] The bipolar plate detection device also includes a resistance tester, which is arranged on the device body and is used to simultaneously connect to the first terminal, the second terminal, the third terminal and the fourth terminal.

[0019] In an optional embodiment, the first detection device also includes a first carbon paper, which is used to be arranged on a side of the first resistance test plate close to the second resistance test plate; the second detection device also includes a second carbon paper, which is used to be arranged on a side of the second resistance test plate close to the first resistance test plate.

[0020] In an optional embodiment, the first resistance test plate is provided with a plurality of first positioning holes, the plurality of first positioning holes are arranged at intervals, and the second resistance test plate is provided with a plurality of second positioning holes, the plurality of second positioning holes are arranged at intervals and correspond one-to-one to the plurality of first positioning holes; the bipolar plate detection equipment also includes a plurality of positioning pins, the plurality of positioning pins are used to be respectively arranged in the plurality of first positioning holes.

[0021] In an optional embodiment, the bipolar plate detection equipment also includes a mounting frame, which includes a fixed plate, a movable plate and a plurality of fixed columns, the plurality of fixed columns are arranged at intervals on the detection platform, the fixed plate is simultaneously connected to the plurality of fixed columns, and is located on a side of the second airtight test plate away from the first airtight test plate; the movable plate is movably connected to the plurality of fixed columns, and is located between the fixed plate and the second airtight test plate, the second airtight test plate is connected to the movable plate, the driving device is arranged on the fixed plate, and the driving rod of the driving device passes through the fixed plate and is connected to the movable plate.

[0022] In an optional embodiment, the bipolar plate detection device further includes a pressure sensor, and the pressure sensor is disposed on the driving rod and located between the fixed plate and the movable plate.

[0023] In an optional embodiment, the bipolar plate detection equipment also includes a first insulating plate and a second insulating plate, the first insulating plate is arranged between the first airtight test plate and the detection platform, and the second insulating plate is arranged between the second airtight test plate and the movable plate.

[0024] The beneficial effects of the embodiments of the utility model include:

[0025] The bipolar plate detection device includes an equipment body, a first detection device, a second detection device and a driving device. The equipment body is provided with a detection platform. The first detection device includes a first airtight test plate and a first resistance test plate. The first airtight test plate is arranged on the detection platform. The first airtight test plate is provided with an air slot and a first air inlet and a first air outlet connected to the air slot at the same time, and is also provided with a cooling slot and a second air inlet and a second air outlet connected to the cooling slot at the same time; the first resistance test plate is arranged on a side of the first airtight test plate away from the detection platform; the second detection device includes a second airtight test plate and a second resistance test plate, and the second airtight test plate is provided with a second airtight test plate and a second resistance test plate. The plate partition is arranged on the side of the first airtight test plate away from the detection platform, and is provided with a hydrogen tank and a third air inlet and a third air outlet which are connected to the hydrogen tank at the same time; the second resistance test plate is arranged on the side of the second airtight test plate close to the first airtight test plate; the driving device is arranged on the detection platform and connected to the second airtight test plate, and is used to drive the second airtight test plate to move toward the first airtight test plate. When the second resistance test plate and the first resistance test plate press the bipolar plate at the same time, one side of the bipolar plate and the air tank and the cooling tank respectively form an air sealing cavity and a cooling sealing cavity, and the other side opposite to the bipolar plate and the hydrogen tank forms a hydrogen sealing cavity.

[0026] When testing the performance of the bipolar plate, the bipolar plate is first placed on the first resistance test plate, and then the second detection device is driven by the driving device to move toward the first detection device as a whole, so that the second resistance test plate presses the bipolar plate with a certain pressing force. At this time, the two sides of the bipolar plate are respectively pressed by the first resistance test plate and the second resistance test plate; in this way, one side of the bipolar plate forms an air sealing cavity with the air groove, and at the same time forms a cooling sealing cavity with the cooling groove, and the other side of the bipolar plate forms a hydrogen sealing cavity with the hydrogen groove.

[0027] When an air tightness test is required, a test gas of a given pressure is introduced into the first air inlet, the second air inlet and the third air inlet respectively, and the corresponding first air outlet, the second air outlet and the third air outlet are blocked at the same time, and then the total gas leakage of the air sealing chamber, the cooling sealing chamber and the hydrogen sealing chamber is measured. When a pressure drop test is required, a test gas of a given pressure is introduced into the first air inlet, the second air inlet and the third air inlet respectively, and then the pressure at the air inlet and outlet of the air sealing chamber, the cooling sealing chamber and the hydrogen sealing chamber is tested respectively, and the pressure difference of the corresponding inlet and outlet is calculated, which is the pressure drop of the corresponding chamber flow channel. When a contact resistance test is required, the first resistance test board and the second resistance test board are directly connected to measure through the corresponding instrument.

[0028] Therefore, the bipolar plate detection device can detect the air tightness, pressure drop and contact resistance of the bipolar plate, improve the detection efficiency and reduce the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of a bipolar plate detection device provided by an embodiment of the utility model;

[0031] Figure 2 A partial structural schematic diagram of a bipolar plate detection device provided by an embodiment of the utility model;

[0032] Figure 3 A schematic diagram of a bipolar plate detection device provided in an embodiment of the utility model detecting a bipolar plate;

[0033] Figure 4 An exploded view of a first detection device and a second detection device provided in an embodiment of the utility model;

[0034] Figure 5 A schematic diagram of the structure of a first detection device provided in an embodiment of the utility model;

[0035] Figure 6 A schematic diagram of the structure of a second detection device provided in an embodiment of the utility model;

[0036] Figure 7 A schematic structural diagram of a first airtight test board provided in an embodiment of the utility model;

[0037] Figure 8 A schematic structural diagram of a second airtight test board provided in an embodiment of the utility model.

[0038] Icons: 100-bipolar plate detection equipment; 10-equipment body; 11-detection platform; 20-first detection device; 21-first airtight test board; 211-air slot; 2111-first air slot; 2112-second air slot; 212-first air inlet; 213-first air outlet; 214-cooling slot; 2141-first cooling slot; 2142-second cooling slot; 215-second air inlet; 216-second air outlet; 217-first sealing slot; 218-second sealing slot; 22-first resistance test board; 221-first wiring terminal; 222-second wiring terminal; 223-first positioning hole; 23-first sealing ring; 24-second sealing ring; 25-first air inlet joint; 26-second air inlet joint; 27-first air outlet joint; 28-second air outlet joint; 29-first carbon paper; 30-second detection device; 31-second airtight test plate; 311-hydrogen tank; 3111-first hydrogen tank; 3112-second hydrogen tank; 312-third air inlet; 313-third air outlet; 314-third sealing groove; 315-fourth sealing groove; 32-second resistance test plate; 321-third wiring terminal; 322-fourth wiring terminal; 323-second positioning hole; 33-third sealing ring; 34-fourth sealing ring; 35-third air inlet connector; 36-third air outlet connector; 37-second carbon paper; 40-driving device; 41-driving rod; 50-positioning pin; 60-mounting frame; 61-fixed plate; 62-fixed column; 63-movable plate; 70-pressure sensor; 81-first insulating plate; 82-second insulating plate; 91-resistance tester; 92-controller; 200-bipolar plate. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] As described in the background technology, the bipolar plate is the core component of the fuel cell. It plays the role of mass transfer, conduction, heat dissipation and support in the fuel cell, and has a very important influence on the performance of the fuel cell. Therefore, in the design process of the bipolar plate, it is necessary to consider the influence of the plate structure, flow channel size, packaging pressure, and sealing design on the plate conductivity, material transfer and other performances. And the determination of these parameters usually adopts contact resistance test, pressure drop test and air tightness test on the bipolar plate respectively to meet the requirements of various performances of the bipolar plate. At present, different detection equipment is usually used to perform different tests on the bipolar plate respectively, resulting in low efficiency of performance detection of the bipolar plate, and multiple detection equipment will also make the cost higher.

[0046] Based on this, please refer to Figure 1-Figure 8The embodiment of the utility model provides a bipolar plate detection device 100, which can effectively improve the above-mentioned technical problems, that is, it can detect the contact resistance, voltage drop and air tightness of the bipolar plate 200 through a single device, thereby improving the detection efficiency and reducing the cost. The bipolar plate detection device 100 will be described in detail below.

[0047] Please refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of the bipolar plate detection device 100 provided in this embodiment, Figure 2 A partial structural diagram of the bipolar plate detection device 100 provided in this embodiment, combined with Figure 1 and Figure 2 The bipolar plate detection device 100 includes a device body 10, a first detection device 20, a second detection device 30 and a driving device 40, and a detection platform 11 is provided on the device body 10; Figure 1 As shown, in the present embodiment, the device body 10 is a box structure, so that other parts of the device can be better stored and integrated; of course, in other embodiments, the device body 10 can also be a frame structure or other structural forms.

[0048] Specifically, please refer to Figure 3-Figure 6 , Figure 3 A schematic diagram of the bipolar plate detection device 100 provided in this embodiment detecting the bipolar plate 200, Figure 4 The exploded diagram of the first detection device 20 and the second detection device 30 provided in this embodiment, Figure 5 This is a schematic diagram of the structure of the first detection device 20 provided in this embodiment, Figure 6 The schematic diagram of the structure of the second detection device 30 provided in this embodiment, combined with Figure 3-Figure 6The first detection device 20 includes a first airtight test board 21 and a first resistance test board 22. The first airtight test board 21 is arranged on the detection platform 11. The first airtight test board 21 is provided with an air slot 211 and a first air inlet 212 and a first air outlet 213 which are connected to the air slot 211 at the same time. The first airtight test board 21 is also provided with a cooling slot 214 and a second air inlet 215 and a second air outlet 216 which are connected to the cooling slot 214 at the same time. The first resistance test board 22 is arranged on a side of the first airtight test board 21 away from the detection platform 11. The second detection device 30 includes a second airtight test board 31 and a second resistance test board 32. The second airtight test board 31 is arranged at a distance from the first airtight test board 21 away from the detection platform 11. One side is provided with a hydrogen tank 311 and a third air inlet 312 and a third air outlet 313 which are connected to the hydrogen tank 311 at the same time; the second resistance test plate 32 is arranged on the side of the second airtight test plate 31 close to the first airtight test plate 21; the driving device 40 is arranged on the detection platform 11 and is connected to the second airtight test plate 31, and is used to drive the second airtight test plate 31 to move toward the first airtight test plate 21. When the second resistance test plate 32 and the first resistance test plate 22 press the bipolar plate 200 at the same time, one side of the bipolar plate 200 and the air tank 211 and the cooling tank 214 respectively form an air sealing cavity and a cooling sealing cavity, and the other side opposite to the bipolar plate 200 and the hydrogen tank 311 forms a hydrogen sealing cavity.

[0049] When testing the performance of the bipolar plate 200, the bipolar plate 200 is first placed on the first resistance test plate 22, and then the second detection device 30 is driven by the driving device 40 to move toward the first detection device 20 as a whole, so that the second resistance test plate 32 presses the bipolar plate 200 with a certain pressing force. At this time, the two sides of the bipolar plate 200 are respectively pressed by the first resistance test plate 22 and the second resistance test plate 32; in this way, one side of the bipolar plate 200 forms an air sealing cavity with the air groove 211, and at the same time forms a cooling sealing cavity with the cooling groove 214, and the other side of the bipolar plate 200 forms a hydrogen sealing cavity with the hydrogen groove 311.

[0050] When an air tightness test is required, a test gas of a given pressure is introduced into the first air inlet 212, the second air inlet 215 and the third air inlet 312 respectively, and the corresponding first air outlet 213, the second air outlet 216 and the third air outlet 313 are blocked at the same time, and then the total gas leakage of the air sealing chamber, the cooling sealing chamber and the hydrogen sealing chamber is measured. When a pressure drop test is required, a test gas of a given pressure is introduced into the first air inlet 212, the second air inlet 215 and the third air inlet 312 respectively, and then the pressure at the air inlet and outlet of the air sealing chamber, the cooling sealing chamber and the hydrogen sealing chamber is tested respectively, and the pressure difference of the corresponding air inlet and outlet is calculated, which is the pressure drop of the corresponding chamber flow channel. When a contact resistance test is required, the first resistance test board 22 and the second resistance test board 32 are directly connected to measure through the corresponding instrument. Therefore, the bipolar plate testing device 100 can detect the air tightness, pressure drop, and contact resistance of the bipolar plate 200, thereby improving the testing efficiency and reducing the cost.

[0051] Combination Figure 1 In order to facilitate the detection of contact resistance, the bipolar plate detection device 100 also includes a resistance tester 91, which is arranged on the device body 10 and is used to connect with the first resistance test plate 22 and the second resistance test plate 32 at the same time. Figure 1 and Figure 4 The first resistance test board 22 has a first terminal 221 and a second terminal 222 at both ends, and the second resistance test board 32 has a third terminal 321 and a fourth terminal 322 at both ends. The resistance tester 91 is used to simultaneously connect to the first terminal 221, the second terminal 222, the third terminal 321 and the fourth terminal 322.

[0052] It should be noted that, in the present embodiment, the first resistance test board 22 and the second resistance test board 32 are both made of gold-plated boards. Of course, in other embodiments, the first resistance test board 22 and the second resistance test board 32 may also be other types such as silver-plated boards.

[0053] It should also be noted that, for the gas detection instrument, a differential pressure gas leakage tester can be used, which can be set on the device body 10, and of course can also be used independently. Specifically, the designated sealed chamber is inflated by the gas source, and after reaching the designated pressure, the gas supply is stopped after a period of stabilization, and then after a period of time, the pressure drop change is detected by the differential pressure gas leakage tester, and the gas leakage amount is calculated, so as to judge the airtightness of the bipolar plate 200.

[0054] Please combine Figure 4-Figure 6In order to facilitate the introduction or blocking of gas at different air inlets and outlets, in the present embodiment, the first detection device 20 also includes a first air inlet connector 25, a second air inlet connector 26, a first air outlet connector 27 and a second air outlet connector 28, the first air inlet connector 25 is arranged at the first air inlet 212, the second air inlet connector 26 is arranged at the second air inlet 215, the first air outlet connector 27 is arranged at the first air outlet 213, and the second air outlet connector 28 is arranged at the second air outlet 216; the second detection device 30 also includes a third air inlet connector 35 and a third air outlet connector 36, the third air inlet connector 35 is arranged at the third air inlet 312, and the third air outlet connector 36 is arranged at the third air outlet 313.

[0055] Furthermore, the air groove 211 includes a first air groove 2111 and a second air groove 2112, the cooling groove 214 includes a first cooling groove 2141 and a second cooling groove 2142, the first air groove 2111 and the first cooling groove 2141 are respectively arranged at both ends of the first airtight test plate 21; the first air inlet 212 is connected to the first air groove 2111, and the first air outlet 213 is connected to the second air groove 2112; the second air inlet 215 is connected to the first cooling groove 2141, and the second air outlet 216 is connected to the second cooling groove 2142; the hydrogen groove 311 includes a first hydrogen groove 3111 and a second hydrogen groove 3112 which are respectively arranged at both ends of the second airtight test plate 31, the third air inlet 312 is connected to the first hydrogen groove 3111, and the third air outlet 313 is connected to the second hydrogen groove 3112.

[0056] It is easy to understand that by means of the air inlets and outlets arranged on opposite sides, as well as the first air groove 2111 and the second air groove 2112, the first cooling groove 2141 and the second cooling groove 2142, and the first hydrogen groove 3111 and the second hydrogen groove 3112 respectively located at both ends of the airtight test plate, it is possible to more conveniently detect air tightness and test the inlet and outlet pressures.

[0057] It should be noted that, in the present embodiment, the first air groove 2111 and the second air groove 2112, the first cooling groove 2141 and the second cooling groove 2142, and the first hydrogen groove 3111 and the second hydrogen groove 3112 are separated by the test plate body. Since corresponding flow channels are provided on both sides of the bipolar plate 200, when the bipolar plate 200 is pressed, the corresponding flow channels can connect the first air groove 2111 and the second air groove 2112, the first cooling groove 2141 and the second cooling groove 2142, and the first hydrogen groove 3111 and the second hydrogen groove 3112, thereby forming an integral sealed chamber and realizing the connection between the corresponding air inlet and outlet and the corresponding sealed chamber.

[0058] In order to further improve the sealing performance of the air slot 211, the cooling slot 214 and the hydrogen slot 311 in forming respective sealed chambers with the bipolar plate 200, please refer to Figure 7 and Figure 8 , Figure 7 This is a schematic diagram of the structure of the first airtight test board 21 provided in this embodiment, Figure 8 The schematic diagram of the structure of the second airtight test board 31 provided in this embodiment, combined with Figure 4 , Figure 7 and Figure 8 The first airtight test plate 21 is also provided with a first sealing groove 217 and a second sealing groove 218. The first sealing groove 217 is arranged around the periphery of the first air groove 2111 and the first cooling groove 2141 at the same time, and the second sealing groove 218 is arranged around the periphery of the second air groove 2112 and the second cooling groove 2142 at the same time; the first detection device 20 also includes a first sealing ring 23 and a second sealing ring 24. The first sealing ring 23 is arranged in the first sealing groove 217, and the second sealing ring 24 is arranged in the second sealing groove 218; the second airtight test plate 31 is also provided with a third sealing groove 314 and a fourth sealing groove 315. The third sealing groove 314 is arranged around the periphery of the first hydrogen groove 3111, and the fourth sealing groove 315 is arranged around the periphery of the second hydrogen groove 3112; the second detection device 30 also includes a third sealing ring 33 and a fourth sealing ring 34. The third sealing ring 33 is arranged in the third sealing groove 314, and the fourth sealing ring 34 is arranged in the fourth sealing groove 315.

[0059] It is easy to understand that the first sealing ring 23 and the second sealing ring 24 are specifically located between the first airtight test plate 21 and the first resistance test plate 22, and are respectively abutted against the two, so as to prevent the introduced test gas from overflowing therebetween; similarly, the third sealing ring 33 and the fourth sealing ring 34 are specifically located between the second airtight test plate 31 and the second resistance test plate 32, that is, the third sealing ring 33 and the fourth sealing ring 34 are both abutted against the second airtight test plate 31 and the second resistance test plate 32 at the same time.

[0060] Please continue to combine Figure 4-Figure 6 In order to improve the test effect of contact resistance and better evaluate the performance of the bipolar plate 200, in this embodiment, the first detection device 20 also includes a first carbon paper 29, which is used to be arranged on a side of the first resistance test plate 22 close to the second resistance test plate 32; the second detection device 30 also includes a second carbon paper 37, which is used to be arranged on a side of the second resistance test plate 32 close to the first resistance test plate 22.

[0061] It should be noted that when performing the air tightness test and the pressure drop test, the first carbon paper 29 and the second carbon paper 37 need to be removed. When performing the contact resistance test, the carbon paper needs to be placed back on the resistance test board. Specifically, one of the first carbon paper 29 and the second carbon paper 37 is first removed, and then the first resistance test board 22 and the second resistance test board 32 are pressed tightly with a certain pressure, and the first resistance value R1 is measured by the resistance tester 91; then the removed carbon paper is put back, and then pressed tightly with a certain pressure, and the second resistance value R is measured by the resistance tester 91. For the specific measurement method of the contact resistance, the content in GB / T20042.6-2011 can be referred to, and this embodiment will not be repeated here.

[0062] In order to better fix the bipolar plate 200, in the present embodiment, the first resistance test plate 22 is provided with a plurality of first positioning holes 223, the plurality of first positioning holes 223 are arranged at intervals, the second resistance test plate 32 is provided with a plurality of second positioning holes 323, the plurality of second positioning holes 323 are arranged at intervals, and correspond one to one with the plurality of first positioning holes 223; the bipolar plate detection device 100 further includes a plurality of positioning pins 50, the plurality of positioning pins 50 are used to be respectively arranged in the plurality of first positioning holes 223. It is easy to understand that when the first resistance test plate 22 and the second resistance test plate 32 press the bipolar plate 200 at the same time, the two ends of the positioning pin 50 are just arranged in the first positioning hole 223 and the second positioning hole 323, respectively.

[0063] Please combine Figure 2 and Figure 3 The bipolar plate detection equipment 100 also includes a mounting frame 60, which includes a fixed plate 61, a movable plate 63 and a plurality of fixed columns 62. The plurality of fixed columns 62 are arranged at intervals on the detection platform 11. The fixed plate 61 is connected to the plurality of fixed columns 62 at the same time and is located on the side of the second airtight test plate 31 away from the first airtight test plate 21; the movable plate 63 is movably connected to the plurality of fixed columns 62 and is located between the fixed plate 61 and the second airtight test plate 31. The second airtight test plate 31 is connected to the movable plate 63. The driving device 40 is arranged on the fixed plate 61. The driving rod 41 of the driving device 40 is passed through the fixed plate 61 and is connected to the movable plate 63.

[0064] By setting up multiple fixed columns 62 and fixed plates 61, the driving device 40 can be better installed to improve the stability of the installation and operation of the driving device 40; at the same time, by setting up a movable plate 63 and simultaneously movably connecting and cooperating with multiple fixed columns 62, the stability of the first detection device 20 during the overall movement can also be improved.

[0065] Furthermore, in order to better control the pressure applied by the driving device 40 to the bipolar plate 200 , in this embodiment, the bipolar plate detection device 100 also includes a pressure sensor 70 , which is disposed on the driving rod 41 and located between the fixed plate 61 and the movable plate 63 .

[0066] In addition, in order to improve the insulation effect, the bipolar plate detection equipment 100 also includes a first insulating plate 81 and a second insulating plate 82. The first insulating plate 81 is arranged between the first airtight test plate 21 and the detection platform 11, and the second insulating plate 82 is arranged between the second airtight test plate 31 and the movable plate 63.

[0067] Please combine Figure 1 In this embodiment, the bipolar plate detection device 100 also includes a controller 92, which is used to control the overall operation of the device. It is easy to understand that the controller 92 can control devices such as the resistance tester 91, the driving device 40, and the test gas supply device, and receive feedback signals from the pressure sensor 70, etc., so as to adjust the test parameters; in addition, the controller 92 also has a display screen, which can display the test results, thereby realizing automated detection of various performances of the bipolar plate 200.

[0068] In summary, an embodiment of the utility model provides a bipolar plate detection device 100, which includes a device body 10, a first detection device 20, a second detection device 30 and a driving device 40. A detection platform 11 is provided on the device body 10, and the first detection device 20 includes a first airtight test plate 21 and a first resistance test plate 22. The first airtight test plate 21 is arranged on the detection platform 11, and the first airtight test plate 21 is provided with an air groove 211 and a first air inlet 212 and a first air outlet 213 which are connected to the air groove 211 at the same time, and a cooling groove 214 and a second air inlet 215 and a second air outlet 216 which are connected to the cooling groove 214 at the same time; the first resistance test plate 22 is arranged on a side of the first airtight test plate 21 away from the detection platform 11; the second detection device 30 includes a second airtight test plate 3 1 and a second resistance test plate 32, the second airtight test plate 31 is spaced apart at a side of the first airtight test plate 21 away from the detection platform 11, and is provided with a hydrogen tank 311 and a third air inlet 312 and a third air outlet 313 which are simultaneously connected to the hydrogen tank 311; the second resistance test plate 32 is arranged on a side of the second airtight test plate 31 close to the first airtight test plate 21; the driving device 40 is arranged on the detection platform 11 and connected to the second airtight test plate 31, and is used to drive the second airtight test plate 31 to move toward the first airtight test plate 21, when the second resistance test plate 32 and the first resistance test plate 22 press the bipolar plate 200 at the same time, one side of the bipolar plate 200 and the air tank 211 and the cooling tank 214 respectively form an air sealing cavity and a cooling sealing cavity, and the other side of the bipolar plate 200 opposite to the hydrogen tank 311 forms a hydrogen sealing cavity.

[0069] That is to say, when testing the performance of the bipolar plate 200, the bipolar plate 200 is first placed on the first resistance test plate 22, and then the second detection device 30 is driven by the driving device 40 to move as a whole toward the first detection device 20, so that the second resistance test plate 32 presses the bipolar plate 200 with a certain pressing force. At this time, the two sides of the bipolar plate 200 are respectively pressed by the first resistance test plate 22 and the second resistance test plate 32; in this way, one side of the bipolar plate 200 forms an air sealing cavity with the air groove 211, and at the same time forms a cooling sealing cavity with the cooling groove 214, and the other side of the bipolar plate 200 forms a hydrogen sealing cavity with the hydrogen groove 311.

[0070] When an air tightness test is required, a test gas of a given pressure is introduced into the first air inlet 212, the second air inlet 215 and the third air inlet 312 respectively, and the corresponding first air outlet 213, the second air outlet 216 and the third air outlet 313 are blocked at the same time, and then the total gas leakage of the air sealing chamber, the cooling sealing chamber and the hydrogen sealing chamber is measured.

[0071] When a pressure drop test is required, test gas of given pressure is introduced into the first air inlet 212, the second air inlet 215 and the third air inlet 312 respectively, and then the pressures at the air inlets and outlets of the air sealing chamber, the cooling sealing chamber and the hydrogen sealing chamber are tested respectively. The pressure difference at the corresponding inlets and outlets is calculated, which is the pressure drop of the corresponding chamber flow channel.

[0072] When a contact resistance test is required, the first resistance test board 22 and the second resistance test board 32 are directly connected to perform measurement through corresponding instruments.

[0073] Therefore, the bipolar plate testing device 100 can detect the air tightness, pressure drop, and contact resistance of the bipolar plate 200, thereby improving the testing efficiency and reducing the cost.

[0074] The above description is only a specific embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A bipolar plate detection device, characterized in that: include: A device body (10), wherein a detection platform (11) is provided on the device body (10); A first detection device (20), the first detection device (20) comprising a first airtight test board (21) and a first resistance test board (22), the first airtight test board (21) being arranged on the detection platform (11), the first airtight test board (21) being provided with an air slot (211) and a first air inlet (212) and a first air outlet (213) both being connected to the air slot (211), and being provided with a cooling slot (214) and a second air inlet (215) and a second air outlet (216) both being connected to the cooling slot (214); the first resistance test board (22) being arranged on a side of the first airtight test board (21) away from the detection platform (11); A second detection device (30), the second detection device (30) comprising a second airtight test plate (31) and a second resistance test plate (32), the second airtight test plate (31) being spaced apart from the first airtight test plate (21) on a side away from the detection platform (11), and being provided with a hydrogen tank (311) and a third air inlet (312) and a third air outlet (313) which are both connected to the hydrogen tank (311); the second resistance test plate (32) being arranged on a side of the second airtight test plate (31) close to the first airtight test plate (21); as well as A driving device (40), wherein the driving device (40) is disposed on the detection platform (11) and connected to the second airtight test plate (31), and is used to drive the second airtight test plate (31) to move toward the first airtight test plate (21), and when the second resistance test plate (32) and the first resistance test plate (22) simultaneously press the bipolar plate (200), one side of the bipolar plate (200) and the air groove (211) and the cooling groove (214) respectively form an air sealing cavity and a cooling sealing cavity, and the other side of the bipolar plate (200) opposite to the hydrogen groove (311) forms a hydrogen sealing cavity.

2. The bipolar plate detection device according to claim 1, characterized in that: The air groove (211) comprises a first air groove (2111) and a second air groove (2112); the cooling groove (214) comprises a first cooling groove (2141) and a second cooling groove (2142); the first air groove (2111) and the first cooling groove (2141) are respectively connected to the second air groove (2112) and the second cooling groove (2142) and are arranged at two ends of the first airtight test plate (21); the first air inlet (212) is connected to the first air groove (2111), and the first air outlet (213) is connected to the second air groove (2112); the second air inlet (215) is connected to the first cooling groove (2141), and the second air outlet (216) is connected to the second cooling groove (2142); The hydrogen tank (311) includes a first hydrogen tank (3111) and a second hydrogen tank (3112) respectively arranged at two ends of the second airtight test plate (31), the third air inlet (312) is connected to the first hydrogen tank (3111), and the third air outlet (313) is connected to the second hydrogen tank (3112).

3. The bipolar plate detection device according to claim 2, characterized in that: The first airtight test plate (21) is further provided with a first sealing groove (217) and a second sealing groove (218), wherein the first sealing groove (217) is arranged around the periphery of the first air groove (2111) and the first cooling groove (2141), and the second sealing groove (218) is arranged around the periphery of the second air groove (2112) and the second cooling groove (2142); the first detection device (20) further comprises a first sealing ring (23) and a second sealing ring (24), wherein the first sealing ring (23) is arranged in the first sealing groove (217), and the second sealing ring (24) is arranged in the second sealing groove (218); The second airtight test plate (31) is also provided with a third sealing groove (314) and a fourth sealing groove (315), wherein the third sealing groove (314) is arranged around the periphery of the first hydrogen groove (3111), and the fourth sealing groove (315) is arranged around the periphery of the second hydrogen groove (3112); the second detection device (30) further comprises a third sealing ring (33) and a fourth sealing ring (34), wherein the third sealing ring (33) is arranged in the third sealing groove (314), and the fourth sealing ring (34) is arranged in the fourth sealing groove (315).

4. The bipolar plate detection device according to claim 1, characterized in that: The first detection device (20) further comprises a first air inlet connector (25), a second air inlet connector (26), a first air outlet connector (27) and a second air outlet connector (28), wherein the first air inlet connector (25) is arranged at the first air inlet (212), the second air inlet connector (26) is arranged at the second air inlet (215), the first air outlet connector (27) is arranged at the first air outlet (213), and the second air outlet connector (28) is arranged at the second air outlet (216); The second detection device (30) further comprises a third air inlet connector (35) and a third air outlet connector (36), wherein the third air inlet connector (35) is arranged at the third air inlet (312), and the third air outlet connector (36) is arranged at the third air outlet (313).

5. The bipolar plate detection device according to claim 1, characterized in that: The first resistance test board (22) is provided with a first wiring terminal (221) and a second wiring terminal (222) at two ends, and the second resistance test board (32) is provided with a third wiring terminal (321) and a fourth wiring terminal (322) at two ends; The bipolar plate detection device (100) further comprises a resistance tester (91), which is arranged on the device body (10) and is used to simultaneously connect to the first wiring terminal (221), the second wiring terminal (222), the third wiring terminal (321) and the fourth wiring terminal (322).

6. The bipolar plate detection device according to claim 1, characterized in that: The first detection device (20) further comprises a first carbon paper (29), the first carbon paper (29) being used to be arranged on a side of the first resistance test board (22) close to the second resistance test board (32); the second detection device (30) further comprises a second carbon paper (37), the second carbon paper (37) being used to be arranged on a side of the second resistance test board (32) close to the first resistance test board (22).

7. The bipolar plate detection device according to claim 1, characterized in that: The first resistance test plate (22) is provided with a plurality of first positioning holes (223), and the plurality of first positioning holes (223) are arranged at intervals; the second resistance test plate (32) is provided with a plurality of second positioning holes (323), and the plurality of second positioning holes (323) are arranged at intervals and correspond one to one with the plurality of first positioning holes (223); the bipolar plate detection device (100) further comprises a plurality of positioning pins (50), and the plurality of positioning pins (50) are used to be respectively arranged in the plurality of first positioning holes (223).

8. The bipolar plate detection device according to claim 1, characterized in that: The bipolar plate detection device (100) further includes a mounting frame (60), wherein the mounting frame (60) includes a fixed plate (61), a movable plate (63) and a plurality of fixed columns (62), wherein the plurality of fixed columns (62) are arranged at intervals on the detection platform (11), and the fixed plate (61) is simultaneously connected to the plurality of fixed columns (62) and is located on a side of the second airtight test plate (31) away from the first airtight test plate (21); the movable plate (63) is movably connected to the plurality of fixed columns (62) and is located between the fixed plate (61) and the second airtight test plate (31), and the second airtight test plate (31) is connected to the movable plate (63), and the driving device (40) is arranged on the fixed plate (61), and the driving rod (41) of the driving device (40) is passed through the fixed plate (61) and is connected to the movable plate (63).

9. The bipolar plate detection device according to claim 8, characterized in that: The bipolar plate detection device (100) further comprises a pressure sensor (70), wherein the pressure sensor (70) is arranged on the driving rod (41) and is located between the fixed plate (61) and the movable plate (63).

10. The bipolar plate detection device according to claim 8, characterized in that: The bipolar plate detection device (100) further includes a first insulating plate (81) and a second insulating plate (82), wherein the first insulating plate (81) is arranged between the first airtight test plate (21) and the detection platform (11), and the second insulating plate (82) is arranged between the second airtight test plate (31) and the movable plate (63).

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