Gas tightness detection equipment for fuel cell polar plate

Abstract

The utility model relates to the technical field of fuel cell electrode plate airtightness detection, and discloses fuel cell electrode plate airtightness detection equipment, which comprises a conveying frame, a conveying belt arranged on the inner side of the conveying frame, a first electric push rod fixedly connected to the inner wall of the conveying frame, and a sealing frame fixedly connected to the telescopic end of the first electric push rod. The top of the sealing frame is communicated with an air pump and an airflow detector; according to the device, tight contact between a sealing frame and a placing plate is realized by utilizing an air storage cylinder, a second electric push rod, an air bag and a rubber ring, so that a fuel cell pole plate is ensured to be in a sealed environment in the placing plate and the sealing frame, the accuracy of air tightness detection of the fuel cell pole plate is improved, and a supporting block is utilized to realize that when the placing plate is subjected to an abutting force, the sealing frame is not damaged. The sealing performance of the joint of the sealing frame and the placing plate is ensured, and the effect of detecting the air tightness of the fuel cell polar plate is further ensured; the problem that an existing method for detecting the air tightness of the fuel cell polar plate is low in accuracy and efficiency is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fuel cell polar plate air tightness detection, and in particular relates to fuel cell polar plate air tightness detection equipment. Background Art

[0002] The fuel cell plate is a very important component in the fuel cell. Its main function is to transfer and convert the electronic charge generated by the catalytic reaction of hydrogen and oxygen to generate electrical energy. The main function of the fuel cell plate is to support the flow of the starting materials and products of the battery reaction, maintain the stability of the electrolyte membrane and its surrounding environment, and output the electrons and loads through the current between the plates. At the same time, the plate also carries the transmission channel of temperature and gas, and is also one of the key components of the thermal management and control of fuel cells. After the fuel cell plate is produced, the gas tightness detection equipment will be used to test the gas tightness of the fuel cell plate to ensure that the fuel cell will not leak gas during use, thereby ensuring the safety performance of the fuel cell.

[0003] The commonly used fuel cell air tightness detection methods currently include:

[0004] Bipolar plate water cavity air tightness detection method: Use a transparent end plate to lay a glue line on the bipolar plate to be tested, then place the plate in the end plate, apply a certain force to the bipolar plate clamped in the end plate, and after a test gas with a certain air pressure is introduced into the bipolar plate water cavity, close the gas shut-off valve and check whether the pressure drops within a certain period of time. If the pressure does not drop, it means that the bipolar plate is airtight and qualified. However, the above method has the problem that laying the glue line takes a long time, and only a single bipolar plate can be tested each time, which is inefficient and not conducive to mass production testing.

[0005] Differential pressure leak detection method: fill gas into the test piece (battery pack) and the reference piece at the same time, and then compare the differential pressure between the two within a certain period of time to determine whether the test piece has a leak; however, this method can only detect whether the car power battery is leaking. If the car power battery is leaking, the leak position cannot be accurately located, and manual secondary detection is required, which increases the detection workload.

[0006] It can be seen that the existing methods for detecting fuel cell plates as described above all have certain defects when used, resulting in the inability to accurately and quickly complete the fuel cell plate airtightness detection in industrial production. Therefore, it is urgent to design an intelligent, fully automatic fuel cell plate airtightness detection device and a matching detection method to solve the problems existing in the above-mentioned prior art and improve the efficiency and accuracy of fuel cell plate airtightness detection. Utility Model Content

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the utility model provides a fuel cell plate air tightness detection device, which has the advantages of accurately detecting the air tightness of the fuel cell plate, and solves the problems of low accuracy and efficiency in the existing methods for detecting the air tightness of the fuel cell plate.

[0009] (II) Technical solution

[0010] In order to achieve the above-mentioned purpose of detecting the air tightness of the fuel cell plate with high accuracy and detection efficiency, the utility model provides the following technical solutions:

[0011] A fuel cell plate air tightness detection device comprises: a conveyor frame, a conveyor belt is arranged on the inner side of the conveyor frame, a first electric push rod is fixedly connected to the inner wall of the conveyor frame, a sealing frame is fixedly connected to the telescopic end of the first electric push rod, an air pump and an airflow detector are connected to the top of the sealing frame, the bottom of the air pump is fixedly connected to the top of the conveyor frame, and a sealing mechanism is arranged on the surface of the sealing frame; wherein, the sealing mechanism comprises a placement plate fixedly connected to the surface of the conveyor belt and distributed in rows, a rubber ring is fixedly connected to the bottom of the sealing frame, an air bag is fixedly connected to the inner wall of the sealing frame, the front end of the air bag is connected to the air pipe, and a sealing component is arranged on the surface of the sealing frame.

[0012] As a preferred solution of the fuel cell plate air tightness detection equipment described in the utility model: the sealing assembly includes an air cylinder connected to the top end of the air pipe, the inner wall of the air cylinder is slidably connected to a piston rack, the front end of the piston rack is fixedly connected to a second electric push rod, and the inner side of the conveying frame is fixedly connected to two support blocks, and the top of the support block is in contact with the inner side of the conveyor belt.

[0013] Based on the above technical features: by utilizing the air cylinder, the second electric push rod, the airbag and the rubber ring, a tight contact between the sealing frame and the placement plate is achieved, thereby ensuring that the fuel cell plate is in a sealed environment within the placement plate and the sealing frame, thereby improving the accuracy of the fuel cell plate air tightness detection, and by utilizing the support block, the placement plate will not move downward when subjected to resistance, thereby ensuring the sealing of the connection between the sealing frame and the placement plate, thereby ensuring the effect of the fuel cell plate air tightness detection.

[0014] As a preferred solution of the fuel cell plate air tightness detection equipment described in the utility model: the inner wall of the air pipe is slidably connected with a blocking block, and the top of the blocking block is fixedly connected with a driven block; the rear end of the conveying frame is fixedly connected with an active block, and the shape of the active block is a right-angled trapezoid.

[0015] Based on the above technical features: by using the driven block and the active block, the sealing frame is abutted against the placement plate, and the air pipe is unobstructed, ensuring that the compressed gas in the air cylinder can flow into the airbag through the air pipe.

[0016] As a preferred solution of the fuel cell plate air tightness detection device described in the utility model: one side of the air pipe is fixedly connected to a first spring, and the other end of the first spring is fixedly connected to one side of the driven block.

[0017] Based on the above technical features: the first spring is used to achieve the sealing of the trachea by the sealing block, ensuring that when the sealing frame is not in contact with the placement plate, the compressed gas in the air storage cylinder will not flow into the airbag.

[0018] As a preferred solution of the fuel cell plate air tightness detection device described in the utility model: a fixing block is fixedly connected to one side of the placement plate.

[0019] As a preferred solution of the fuel cell plate air tightness detection device described in the utility model: a stopper is slidably connected to one side of the sealing frame.

[0020] Based on the above technical features: by using the fixing block and the stopper, the placement plate can be accurately moved to the bottom of the sealing frame, thereby ensuring that the rubber ring can be quickly and accurately inserted into the placement plate.

[0021] As a preferred solution of the fuel cell plate air tightness detection device described in the utility model: the top of the stopper is fixedly connected to a second spring, and the top end of the second spring is fixedly connected to the bottom of the sealing frame.

[0022] Based on the above technical features: the second spring is used to realize the upward movement of the stopper while being pushed by the fixed block, ensuring that the stopper will not block the normal movement of the placement plate.

[0023] (III) Beneficial effects

[0024] Compared with the prior art, the utility model provides a fuel cell plate air tightness detection device, including a sealing mechanism and a sealing assembly, which has the following beneficial effects:

[0025] 1. The air storage cylinder, the second electric push rod, the air bag and the rubber ring are used to achieve close contact between the sealing frame and the placement plate, thereby ensuring that the fuel cell plate can be in a sealed environment in the placement plate and the sealing frame, thereby improving the accuracy of the fuel cell plate air tightness detection;

[0026] 2. The support block is used to prevent the placement plate from moving downward when subjected to a resistance force, thereby ensuring the sealing of the connection between the sealing frame and the placement plate, thereby ensuring the detection effect of the fuel cell plate airtightness detection process;

[0027] 3. By using the fixing block and the stopper, the placement plate can be accurately moved to the bottom of the sealing frame, thereby ensuring that the rubber ring can be quickly and accurately plugged into the placement plate, achieving the purpose of detecting the air tightness of the fuel cell plate with high accuracy and detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of the utility model fuel cell plate air tightness detection equipment;

[0029] Figure 2 It is a structural schematic diagram of the sealing mechanism of the utility model;

[0030] Figure 3 It is a cross-sectional view of the sealing frame of the utility model;

[0031] Figure 4 This is a partial enlarged view of the fuel cell plate air tightness detection device A of the utility model;

[0032] Figure 5 This is a partial enlarged view of the fuel cell plate air tightness detection device B of the utility model.

[0033] In the figure: 1. conveying frame; 2. conveyor belt; 3. first electric push rod; 4. sealing frame; 5. air pump; 6. air flow detector; 7. sealing mechanism; 71. placement plate; 72. rubber ring; 73. air bag; 74. air pipe; 75. sealing assembly; 751. air storage cylinder; 752. piston rack; 753. second electric push rod; 754. blocking block; 755. driven block; 756. active block; 757. first spring; 758. fixed block; 759. stopper; 7510. second spring; 7511. support block. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Example 1: Please refer to Figure 1-5 , the utility model provides a technical solution:

[0036] A fuel cell plate air tightness detection device, comprising:

[0037] A conveyor frame 1, a conveyor belt 2 is arranged inside the conveyor frame 1, and a first electric push rod 3 is fixedly connected to the upper bracket of the conveyor frame 1, a sealing frame 4 is fixedly connected to the telescopic end of the first electric push rod 3, the top of the sealing frame 4 is connected to an air pump 5 and an air flow detector 6, the bottom of the air pump 5 is fixedly connected to the top of the bracket, and a sealing mechanism 7 is also arranged on the lower surface of the sealing frame 4; the sealing mechanism 7 includes a placement plate 71 fixedly connected to the surface of the conveyor belt 2 and distributed in equal rows, and a rubber ring 72 is fixedly connected to the bottom of the sealing frame 4 , and an air bag 73 is fixedly connected to the inner wall of the sealing frame 4, and the front end of the air bag 73 is connected to the air pipe 74; the surface of the sealing frame 4 is also provided with a sealing component 75, and the sealing component 75 includes an air storage cylinder 751 connected to the top of the air pipe 74, and the inner wall of the air storage cylinder 751 is slidably connected to a piston rack 752, and the front end of the piston rack 752 is fixedly connected to a second electric push rod 753, and two support blocks 7511 are fixedly connected to the inner side of the conveying frame 1, and the top of the support block 7511 is in contact with the inner side of the conveyor belt 2.

[0038] As a preferred embodiment, a feeding frame is provided on the top of the conveying frame 1, and the inner wall of the conveying frame 1 is rotatably connected to two pulleys, the inner side of the conveyor belt 2 is transmission-connected to the surface of the pulley, and a receiving frame is provided on one side of the conveying frame 1, and a servo motor is fixedly connected to the front end of the conveying frame 1, and the output shaft of the servo motor is fixedly connected to one end of one of the pulleys, and the surface of the second electric push rod 753 is fixedly connected to the top of the sealing frame 4.

[0039] It should be noted that the servo motor, air pump 5, airflow detector 6, first electric push rod 3 and second electric push rod 753 in the above description are all relatively mature devices in the existing technology. The specific models can be selected according to actual needs. At the same time, the servo motor, air pump 5, airflow detector 6, first electric push rod 3 and second electric push rod 753 can be powered by a built-in power supply or by AC power. The specific power supply method is selected according to the situation and will not be elaborated here.

[0040] When it is necessary to perform an air tightness test on the fuel cell plate, the fuel cell plate is placed on the top of the corresponding placement plate 71, and the conveyor belt 2 moves to drive the corresponding placement plate 71 to move to the bottom of the sealing frame 4, and the first electric push rod 3 is started. The telescopic end of the first electric push rod 3 moves downward to drive the sealing frame 4 to move downward, so that the rubber ring 72 is snapped onto the corresponding placement plate 71, and the second electric push rod 753 is started. The telescopic end of the second electric push rod 753 moves to drive the piston rack 752 to move in the gas cylinder 751, so that the compressed gas in the gas cylinder 751 flows into the air bag 73 through the air pipe 74. The air bag 73 expands due to the filling of gas, so that the connection between the sealing frame 4 and the corresponding placement plate 71 is in a sealed state. At this time, the air pump 5 and the airflow detector 6 are used to start the air tightness test of the fuel cell plates in the sealing frame 4 and the corresponding placement plate 71.

[0041] Example 2: Figure 4-5 As shown, the inner wall of the air pipe 74 is slidably connected with a blocking block 754, the top of the blocking block 754 is fixedly connected with a driven block 755, the rear end of the conveying frame 1 is fixedly connected with an active block 756, the shape of the active block 756 is a right-angled trapezoid, one side of the air pipe 74 is fixedly connected with a first spring 757, and the other end of the first spring 757 is fixedly connected to one side of the driven block 755.

[0042] The sealing frame 4 drives the driven block 755 to move on the active block 756 when moving downward, and the driven block 755 drives the blocking block 754 to move when moving on the inclined surface of the active block 756, thereby making the air pipe 74 unobstructed.

[0043] Example 3: Figure 4 As shown, a fixed block 758 is fixedly connected to one side of the placement plate 71, a stopper 759 is slidably connected to one side of the sealing frame 4, a second spring 7510 is fixedly connected to the top of the stopper 759, and the top of the second spring 7510 is fixedly connected to the bottom of the sealing frame 4.

[0044] The conveyor belt 2 drives the corresponding placement plate 71 to move, and the fixed block 758 on the corresponding placement plate 71 moves to the stop block 759. At this time, the conveyor belt 2 stops transmitting to ensure that the corresponding placement plate 71 can be accurately moved to the bottom of the sealing frame 4.

[0045] When the utility model fuel cell plate air tightness detection device is in use: the fuel cell plate is placed on the top of the corresponding placement plate 71, the conveyor belt 2 moves to drive the corresponding placement plate 71 to move, so that the fixed block 758 moves to the stopper 759, and then the corresponding placement plate 71 is located directly below the sealing frame 4, the first electric push rod 3 is started, the telescopic end of the first electric push rod 3 moves downward to drive the sealing frame 4 to move downward, so that the rubber ring 72 is clamped to the corresponding placement plate 71, and the driven block 755 moves on the active block 756, so that the air pipe 74 is unblocked, the second electric push rod 753 is started, the telescopic end of the second electric push rod 753 moves through the piston rack 752 to make the compressed gas in the gas storage cylinder 751 flow into the air bag 73 through the air pipe 74, the air bag 73 expands due to the filling of gas, so that the connection between the sealing frame 4 and the corresponding placement plate 71 is in a sealed state, at this time, through the action of the air pump 5 and the airflow detector 6, the sealing frame 4 and the fuel cell plates in the corresponding placement plate 71 are started to be airtightly detected.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fuel cell plate air tightness detection device, characterized in that: include: A conveying frame (1), wherein a conveying belt (2) and a first electric push rod (3) are arranged on the conveying frame (1), a sealing frame (4) is arranged at the telescopic end of the first electric push rod (3), the sealing frame (4) is connected to an air pump (5) and an air flow detector (6), the bottom of the air pump (5) is connected to the conveying frame (1), a sealing mechanism (7) is arranged on the surface of the sealing frame (4), the sealing mechanism (7) comprises a placement plate (71), a rubber ring (72), an air bag (73) and a sealing component (75), the placement plate (71) is arranged on the conveying belt (2), the rubber ring (72) is arranged at the bottom of the sealing frame (4), the air bag (73) is arranged in the sealing frame (4), the front end of the air bag (73) is connected to an air pipe (74), and the sealing component (75) is arranged on the surface of the sealing frame (4).

2. A fuel cell plate air tightness detection device as claimed in claim 1, characterized in that: The sealing assembly (75) comprises an air cylinder (751) connected to the top end of the air pipe (74), a piston rack (752) is slidably arranged in the air cylinder (751), the front end of the piston rack (752) is fixedly connected to the second electric push rod (753), and a support block (7511) is arranged in the conveying frame (1), and the top of the support block (7511) is in contact with the inner side of the conveyor belt (2).

3. A fuel cell plate air tightness detection device as claimed in claim 1, characterized in that: A blocking block (754) is slidably disposed inside the air pipe (74), and a driven block (755) is disposed on the top of the blocking block (754).

4. A fuel cell plate air tightness detection device as claimed in claim 1, characterized in that: An active block (756) is provided at the rear end of the conveying frame (1), and the shape of the active block (756) is a right-angled trapezoid.

5. A fuel cell plate air tightness detection device as claimed in claim 4, characterized in that: A first spring (757) is provided on one side of the air pipe (74), and the other end of the first spring (757) is connected to the driven block (755).

6. A fuel cell plate air tightness detection device as claimed in claim 1, characterized in that: A fixing block (758) is fixedly connected to one side of the placement plate (71).

7. A fuel cell plate air tightness detection device as claimed in claim 6, characterized in that: A stopper (759) is slidably provided on one side of the sealing frame (4).

8. A fuel cell plate air tightness detection device as claimed in claim 7, characterized in that: A second spring (7510) is arranged on the top of the stopper (759), and the top end of the second spring (7510) is connected to the bottom of the sealing frame (4).

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