Infrared detection airtightness detection tool

Abstract

An infrared detection airtightness detection tool comprises a base, an upper plate is arranged on the base and connected with the base through a bolt, a through hole is formed in the upper plate, a threaded hole is formed in a bottom plate, the bolt penetrates through the through hole and the threaded hole, an air inlet connector is formed in the end face of one end of the base, and an air outlet connector is formed in the end face of the other end of the base. The outer side of the air inlet connector is connected with an air source through a pipeline and an air tightness leak detector, a single-piece air inlet sealing structure and a single-piece air outlet plugging structure are arranged at the two ends of the upper surface of the base respectively, a channel is formed in the single-piece air inlet sealing structure and communicated with the air inlet connector, a plurality of vent holes are formed in the upper plate, and an infrared detector is arranged above the upper plate. According to the utility model, the airtightness of the galvanic pile single piece can be quickly detected through the airtightness leak detector, and the specific position of a leakage point can be quickly and accurately determined through the infrared detector, so that the whole single piece is prevented from being scrapped, the product quality is improved, and the loss is reduced. The upper plate is connected with the base through bolts, and the upper plate and the base can be rapidly installed and fixed.

Description

Technical Field

[0001] The utility model relates to the field of chemistry, in particular to a fuel cell single chip air tightness detection technology, in particular to an infrared detection air tightness detection tool. Background Art

[0002] A fuel cell is a device that uses chemical reactions to convert fuel and oxygen into electricity. The principle is that hydrogen and oxygen undergo a redox reaction under the action of a catalyst to produce electrons, which are then output through an external circuit. A fuel cell stack consists of multiple cells connected in series. If one cell is not sealed properly, the gases on the anode and cathode sides can mix, which can cause a hot spot to form, damaging the membrane electrode at best, or even causing the stack to combust. Therefore, testing the airtightness of the cells is extremely important. Existing single-cell airtightness testers can verify whether a cell has leaks, but they cannot detect the specific location of the leak on the cell, which can easily lead to the entire cell being scrapped. Summary of the Invention

[0003] The purpose of the utility model is to provide an infrared detection airtightness detection tool, which is intended to solve the technical problem that the detection tool in the prior art cannot detect the specific position of the leakage point on a single chip.

[0004] The utility model provides an infrared detection airtightness detection tooling, comprising a base, an upper plate provided on the base, the upper plate being connected to the base by bolts, a through hole provided in the upper plate, a threaded hole provided in the bottom plate, the bolts being passed through the through hole and the threaded hole, an air inlet interface provided on one end face of the base, the outer side of the air inlet interface being connected to an air source through a pipeline and an airtightness leak detector, a single-piece air inlet sealing structure and a single-piece air outlet sealing structure being respectively provided at both ends of the upper surface of the base, a channel being provided in the single-piece air inlet sealing structure, the channel being connected to the air inlet interface, a plurality of air vents being provided in the upper plate, and an infrared detector being provided above the upper plate.

[0005] Furthermore, the ventilation holes are arranged in a matrix along the length and width directions of the upper plate.

[0006] Furthermore, the airtight leak detector is a flow meter or a pressure gauge.

[0007] Compared with existing technologies, this utility model has a positive and significant effect. It can quickly test the airtightness of a single cell in a fuel cell stack using a leak detector and quickly and accurately locate leaks using an infrared detector, preventing the entire cell from being scrapped, improving product quality, and reducing losses. The upper plate is connected to the base via bolts, allowing for quick installation and securement. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1This is a front sectional schematic diagram of an infrared detection airtightness testing tooling of the present invention.

[0009] Figure 2 This is a top view schematic diagram of an infrared detection airtightness testing tooling of the present invention.

[0010] Figure 3 This is a front view schematic diagram of an infrared detection airtightness testing tooling of the present invention.

[0011] Figure 4 for Figure 3 Schematic cross-sectional view of .

[0012] Figure 5 The figure is a side view schematic diagram of an infrared detection airtightness testing tool of the present invention.

[0013] Figure 6 This is a schematic diagram of the infrared detection airtightness testing tooling of the utility model in use. DETAILED DESCRIPTION

[0014] The following is a further description of the present invention in conjunction with an embodiment. However, the present invention is not limited to the embodiment. All similar structures and similar variations of the present invention should be included in the scope of protection of the present invention. The use of directions such as up, down, front, back, left, and right in the present invention is only for the convenience of clear description and does not limit the technical solution of the present invention.

[0015] like Figures 1-6 As shown, the utility model is an infrared detection airtightness detection tooling, comprising a base 1, an upper plate 2 is provided on the base 1, the upper plate 2 is connected to the base 1 by bolts 6, a through hole is provided in the upper plate 2, a threaded hole is provided in the bottom plate, the bolts 6 are passed through the through hole and the threaded hole, an end face of the base 1 is provided with an air inlet interface 3, the outer side of the air inlet interface 3 is connected to an air source (not shown in the figure) through a pipeline and an airtight leak detector 11, a single-piece air inlet sealing structure and a single-piece air outlet sealing structure are respectively provided at both ends of the upper surface of the base 1, a channel is provided in the single-piece air inlet sealing structure, the channel is connected to the air inlet interface 3, a plurality of air vents 4 are provided in the upper plate 2, and an infrared detector 5 is provided above the upper plate 2.

[0016] Furthermore, the ventilation holes 4 are arranged in a matrix along the length direction and the width direction of the upper plate 2 .

[0017] Furthermore, the airtight leak detector 11 is a flow meter or a pressure gauge.

[0018] Specifically, the monolithic air inlet sealing structure includes a first positioning column 7, and the monolithic air outlet sealing structure includes a second positioning column 12. The first positioning column 7 and the second positioning column 12 are respectively arranged at both ends of the upper surface of the base 1. An air hole 8 is axially arranged in the first positioning column 7, and the air hole 8 is connected to the air inlet interface 3. A first blind hole 9 coaxial with the first positioning column 7 and a second blind hole 13 coaxial with the second positioning column 12 are arranged above the first positioning column 7 and in the lower surface of the upper plate 2. A sealing ring 10 is respectively provided on the first positioning column 7, the second positioning column 12, the first blind hole 9 and the second blind hole 13.

[0019] Specifically, the airtight leak detector 11, air source, monolithic air inlet sealing structure, monolithic air outlet blocking structure, infrared detector 5, etc. in this embodiment all adopt well-known solutions in the prior art, which are well understood by those skilled in the art and will not be described in detail here.

[0020] This tool can test various types of fuel cell stacks. Each stack consists of a bipolar plate, a primary carbon paper, a membrane electrode, and a secondary carbon paper, arranged in that order. Each cell has a through-hole for air inlet and outlet, respectively. The edges of the bipolar plate, primary carbon paper, and membrane electrode must be sealed with sealant, while the secondary carbon paper and membrane electrode can be sealed or unsealed. Both the inlet and outlet holes must be sealed with sealing rings and the single-chip seal.

[0021] The working process of this embodiment is as follows: the battery stack monolithic chip is placed on the base 1, the monolithic air inlet hole and the monolithic air outlet hole are respectively sleeved on the first positioning column 7 and the second positioning column 12, and the lower sides of the monolithic air inlet hole and the monolithic air outlet hole are respectively in contact with the sealing ring 10 on the first positioning column 7 and the second positioning column 12, and then the upper plate 2 is placed, and the upper plate 2 is connected to the base 1 by bolts 6. The sealing ring 10 in the first blind hole 9 and the second blind hole 13 is in contact with the upper sides of the monolithic air inlet hole and the monolithic air outlet hole, so that the upper and lower sides of the monolithic air inlet hole and the monolithic air outlet hole are sealed, and the monolithic air outlet hole is blocked by the second positioning column 12 and the sealing ring 10 so that it cannot emit air, and then the air source is ventilated, and the compressed air enters the cavity of the battery stack monolithic chip through the air inlet interface 3 and the air hole 8 in turn. If there is a leakage point in the battery stack monolithic chip, the air will leak through the leakage point and flow out from the air hole 4 of the upper plate 2, and the airtightness leak detector 11 can detect the air pressure drop or flow change. If a leak is present, hydrogen or a mixture of hydrogen and nitrogen is introduced instead. The hydrogen then flows out through the leak and vent 4, reacting with the outside air to generate heat. The illuminated area detected by the infrared detector 5 is the heating area, indicating the leak. The leak can then be partially removed for quality analysis, and the remaining portion can be reconstructed into a small, single piece, thus reducing costs. This tooling can be made of plastic materials with low thermal conductivity, such as plexiglass and transparent PC, to facilitate identification of hot spots.

[0022] The utility model can quickly detect the airtightness of the battery stack single chip through the airtightness leak detector 11, and quickly and accurately determine the specific location of the leak through the infrared detector 5, thereby preventing the entire single chip from being scrapped, improving product quality, and reducing losses. The upper plate 2 is connected to the base 1 by bolts 6, and the upper plate 2 and base 1 can be quickly installed and fixed.

Claims

1. An infrared detection airtightness detection tool, characterized by: It includes a base, an upper plate is provided on the base, the upper plate is connected to the base by bolts, a through hole is provided in the upper plate, a threaded hole is provided in the bottom plate, the bolts are passed through the through hole and the threaded hole, an air inlet interface is provided on one end face of the base, the outer side of the air inlet interface is connected to the air source through a pipeline and an airtight leak detector, a single-piece air inlet sealing structure and a single-piece air outlet sealing structure are respectively provided at both ends of the upper surface of the base, a channel is provided in the single-piece air inlet sealing structure, and the channel is connected to the air inlet interface. A number of air vents are provided in the upper plate, and an infrared detector is provided above the upper plate.

2. The infrared detection airtightness testing tool according to claim 1, characterized in that: The ventilation holes are arranged in a matrix along the length direction and the width direction of the upper plate.

3. The infrared detection airtightness testing tool according to claim 1, characterized in that: The airtight leak detector is a flow meter or a pressure gauge.

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