Hydrogen aging test apparatus for automotive hydrogen tank liners

Abstract

To overcome a risk that leaked hydrogen gas is heated and ignited by impact heat and exploded due to the impact heat generated at an impacted position of an in-vehicle hydrogen tank in a hydrogen gas leakage process.SOLUTION: By limiting the debris by the first limiting portion, the debris is prevented from being entrained in the hydrogen gas and flowing into the second gas pump, and by limiting the debris by the second limiting portion, the debris is also prevented from being entrained in the hydrogen gas and flowing into the second gas pump, thereby improving the debris collection effect of the debris collection position. In addition, the guide surface guides the flow of the hydrogen gas away from the included angle between the guide plate 4 and the second baffle, so as to prevent the flow of the hydrogen gas from affecting the collection of the debris, and avoid the debris being entrained in the hydrogen gas and flowing into the second gas pump to cause blockage and affecting the collection effect of the leaked hydrogen gas of the device.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to the field of hydrogen tank testing technology, and in particular to a hydrogen aging test apparatus for an on-vehicle hydrogen tank liner.

Background Art

[0002] An on-vehicle hydrogen tank is a device whose main body is composed of a liner and a housing, and is configured to store high-pressure hydrogen gas and supply the hydrogen gas as energy to fuel cell vehicles.

[0003] When performing a hydrogen aging test on a hydrogen tank liner, it is necessary to repeat charging and discharging of the hydrogen tank. In practice, when an on-vehicle hydrogen tank is subjected to an impact, even a slight impact may cause microcracks in the cylinder body or damage to the protective layer on the surface of the liner. Such damage is difficult to detect, but there is a risk that it accelerates the hydrogen aging process of the liner. Therefore, in order to improve the reliability of hydrogen aging data, it is necessary to perform an impact simulation test in the hydrogen aging test for an on-vehicle hydrogen tank. When the above two tests are performed simultaneously, if there is a quality problem with the on-vehicle hydrogen tank, a dent will occur at the impacted position of the on-vehicle hydrogen tank, and internal hydrogen gas will leak. Furthermore, during the leakage of hydrogen gas, impact heat is generated at the impacted position of the on-vehicle hydrogen tank, so there is a risk that the leaked hydrogen gas is heated and ignited by the impact heat to cause an explosion, which threatens the personal safety of workers.

Summary of the Invention

Problem to be Solved by the Invention

[0004] The present invention provides a hydrogen aging test apparatus for an on-vehicle hydrogen tank liner to overcome the drawback that during the leakage of hydrogen gas, impact heat generated at the impacted position of the on-vehicle hydrogen tank causes the risk that the leaked hydrogen gas is heated and ignited by the impact heat to explode, which threatens the personal safety of workers.

Means for Solving the Problem

[0005] One embodiment is a hydrogen aging test apparatus for an in-vehicle hydrogen tank liner, comprising a test stand and a protective assembly connected to the test stand, further comprising: a hydrogen aging test assembly connected to the test stand for simulating hydrogen aging of the hydrogen tank liner; an impact simulation assembly provided on the test stand for simulating a state in which the hydrogen tank is subjected to impact; an isolation cover connected to the impact simulation assembly for collecting leaked hydrogen gas; a plurality of guide plates made of elastic plate material connected to the impact simulation assembly; a plurality of partition plates made of elastic plate material connected to each guide plate, for separating leaked hydrogen gas from impact heat; a hydrogen gas detection assembly connected to the protective assembly for detecting the presence or absence of hydrogen gas leakage; a hydrogen gas collection assembly connected to the test stand for collecting leaked hydrogen gas; and a movement assembly connected to the test stand for moving the test stand to a test position.

[0006] In a more preferred embodiment, the protective assembly includes a protective cover fixed to a test bench and a plurality of protective doors that are damped and slidably connected to the protective cover.

[0007] In a more preferred embodiment, the hydrogen aging test assembly includes a first gas pump fixed to a test stand, an intake pipe fixed to the intake port of the first gas pump, a first collection tank fixed to the upper side of a protective cover for collecting hydrogen gas, and a discharge pipe having one end fixed to the exhaust port of the first gas pump and the other end communicating with the first collection tank.

[0008] In a more preferred embodiment, the hydrogen gas collection assembly includes a second gas pump fixed to a test stand; a first connecting pipe having one end communicating with a first intake port of the second gas pump and the other end communicating with the upper left side of an isolation cover; a second connecting pipe having one end communicating with a second intake port of the second gas pump and the other end communicating with the lower left side of an isolation cover; a second collection tank fixed above the first collection tank for collecting leaked hydrogen gas; and a gas transport pipe having one end communicating with the exhaust port of the second gas pump and the other end communicating with the second collection tank.

[0009] In a more preferred embodiment, the impact simulation assembly includes a drive member fixed to a test stand with an extendable end fixed to the right side of an isolation cover, an impact rod with an impact surface on its rear side fixed to the left side of an isolation cover, and a plurality of isolation rods made of thermal insulation material slidably connected to the impact rod, wherein each partition plate does not come into contact with the impact surface, and each isolation rod is fixed to an adjacent partition plate.

[0010] In a more preferred embodiment, the hydrogen gas detection assembly includes a hydrogen gas detector fixed to the inner front of a protective cover, a first guide tube having one end communicating with the intake port of the hydrogen gas detector and the other end communicating with the upper left side of the isolation cover, and a second guide tube having one end communicating with the first guide tube and the other end communicating with the lower left side of the isolation cover.

[0011] In a more preferred embodiment, the mobile assembly includes a plurality of pulleys rotatably connected to the underside of the test stand and a handrail fixed to the left side of the test stand.

[0012] In a more preferred embodiment, the baffle further includes a first baffle fixed to an upper partition plate and a second baffle fixed to a lower guide plate.

[0013] In a more preferred embodiment, the first baffle is provided with a first limiting portion, and the second baffle is provided with a second limiting portion.

[0014] In a more preferred embodiment, the second baffle is provided with a guide surface. [Effects of the Invention]

[0015] The present invention has the following advantages. This invention prevents hydrogen gas leaking from a leak point from coming into contact with the heating surface by shielding the heating surface with an isolation rod and a partition plate. This avoids the risk of the hydrogen gas rising in temperature, igniting, and exploding, which could endanger the safety of workers. By restricting the debris with the first restriction section, it is possible to prevent the debris from being drawn into the hydrogen gas and flowing into the second gas pump. Similarly, by restricting the debris with the second restriction section, it is possible to prevent the debris from being drawn into the hydrogen gas and flowing into the second gas pump, thereby improving the effectiveness of debris collection at the debris collection location. By using the guide surface to guide the hydrogen gas flow away from the angle between the guide plate and the second baffle, it is possible to prevent the hydrogen gas flow from affecting debris collection, thus avoiding the debris being caught in the hydrogen gas and flowing into the second gas pump, causing blockage and affecting the collection effectiveness of the device against leaked hydrogen gas. [Brief explanation of the drawing]

[0016] [Figure 1] This figure shows the three-dimensional structure of the hydrogen aging test apparatus for an in-vehicle hydrogen tank liner according to the present invention. [Figure 2] This figure shows the three-dimensional structure of a combination of the hydrogen aging test assembly, the protective assembly, and the high-temperature simulation assembly according to the present invention. [Figure 3] This figure shows the three-dimensional structure of the hydrogen gas detection assembly, hydrogen tank, and isolation cover combined according to the present invention. [Figure 4] This figure shows the three-dimensional structure of the impact simulation assembly, hydrogen tank, isolation cover, and guide plate combined in the present invention, with the isolation cover having undergone cross-sectional processing. [Figure 5] It is a side view of a combination of the impact simulation assembly, hydrogen tank, isolation cover and guide plate in the present invention, wherein the isolation cover is subjected to cross-section treatment. [Figure 6] It is a side view of a combination of the isolation rod, the first baffle, the second baffle and the partition plate in the present invention. [Figure 7] It is a view showing a dented state of the hydrogen tank in the present invention. [Figure 8] It is a side view of a combination of the guide plate, the partition plate, the isolation rod and the first baffle in the present invention. [Figure 9] It is a side view of a combination of the guide plate, the partition plate, the isolation rod and the second baffle plate in the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, the technical solution will be further described with reference to specific embodiments. However, terms indicating orientations such as upper, lower, left and right used in the present specification only refer to the position of the illustrated structure in the corresponding drawing. In the present specification, the numerals assigned to components, for example, "first", "second", are only used for distinguishing the described objects, and have no ranking or technical significance at all. In addition, terms such as "connected" and "coupled" used in the present application include direct and indirect connection (coupling) unless specifically stated otherwise.

[0018] [Embodiment 1] As shown in Fig. 1 to Fig. 7, the hydrogen aging test apparatus for a vehicle-mounted hydrogen tank liner comprises a test bench and a protection assembly connected to the test bench, Further, the present invention comprises: a hydrogen aging test assembly connected to a test stand 1; an impact simulation assembly provided on the test stand 1; an isolation cover 3 connected to the impact simulation assembly; two guide plates 4 connected to the impact simulation assembly vertically symmetrically and made of an elastic plate material; partition plates 5 respectively connected to each of the guide plates 4 and made of an elastic plate material; a hydrogen gas detection assembly connected to a protection assembly; a hydrogen gas collection assembly connected to the test stand 1; and a moving assembly connected to the test stand 1.

[0019] The protection assembly includes a protection cover 101 fixedly connected to the test stand 1, and protection doors 101 connected to the protection cover 101 symmetrically in left-right direction in a damped and slidable manner.

[0020] The hydrogen aging test assembly includes: a first gas pump 201 fixedly connected to the test stand 1; an intake pipe 206 fixedly connected to an intake port of the test stand 1; a first collection tank 205 fixedly connected to an upper side of the protection cover 101; and an exhaust pipe 204 having one end communicating with an exhaust port of the first gas pump 201 and the other end communicating with the first collection tank 205.

[0021] The hydrogen gas collection assembly includes: a second gas pump 209 fixedly connected to the test stand 1; a first connection pipe 202 having one end communicating with a first intake port of the second gas pump 209 and the other end communicating with an upper left portion of the isolation cover 3; a second connection pipe 203 having one end communicating with a second intake port of the second gas pump 209 and the other end communicating with a lower left portion of the isolation cover 3; a second collection tank 208 fixedly connected to an upper side of the first collection tank 205; and a gas transport pipe 207 having one end communicating with an exhaust end of the second gas pump 209 and the other end communicating with the second collection tank 208.

[0022] The impact simulation assembly includes a drive member 301 fixed to the test stand 1 with its telescopic end fixed to the right side of the isolation cover 3, an impact rod 302 with an impact surface 30201 on its rear side fixed to the left side of the isolation cover 3, and two vertically symmetrical isolation rods 303 made of thermal insulation material slidably connected to the impact rod 302, wherein the drive member 301 is a hydraulic push rod, each partition plate 5 does not come into contact with the impact surface, and each isolation rod 302 is fixed to an adjacent partition plate 5.

[0023] The hydrogen gas detection assembly includes a hydrogen gas detector 401 fixed to the inner front part of the protective cover 101, a first guide tube 402 with one end communicating with the intake port of the hydrogen gas detector 401 and the other end communicating with the upper left side of the isolation cover 3, and a second guide tube 403 with one end communicating with the first guide tube 402 and the other end communicating with the lower left side of the isolation cover 3.

[0024] The movable assembly includes four pulleys 501 that are rotatably connected to the underside of the test stand 1, and a handrail 502 that is fixed to the left side of the test stand 1.

[0025] In this invention, the specific procedure is as follows: First, a worker pulls upward the protective door 102 located on the right side, slides the guard door 102 upward to open the protective cover 101, places the hydrogen tank 2 inside the protective cover 101 with the safety valve facing left, and fixes it to the test stand 1 with bolts. Then, the safety valve of the hydrogen tank 2 is fitted into the intake pipe 206, connecting the safety valve of the hydrogen tank 2 and the intake pipe 206.

[0026] Subsequently, the worker opens the safety valve of hydrogen tank 2 and extracts gas using the first gas pump 201, allowing the hydrogen gas in hydrogen tank 2 to flow into the first collection tank 205 along the intake pipe 206 and exhaust pipe 204. After all the hydrogen gas in hydrogen tank 2 has been extracted, the first gas pump 201 is controlled to refill the tank, allowing the hydrogen gas in the first collection tank 205 to flow into hydrogen tank 2 along the exhaust pipe 204 and intake pipe 206. In this way, high-pressure hydrogen gas is repeatedly filled and filled, impacting the liner of the hydrogen tank and conducting a hydrogen aging test on the liner. Repeating the filling and releasing operation 5 to 10 times constitutes one filling and releasing cycle. After completing one filling and releasing cycle, the worker controls the drive component 301 so that the impact rod 302 moves backward, and along with it, the isolation cover 3, guide plate 4, and partition plate 5 also move backward, causing the impact surface 30201 of the impact rod 302 to impact the hydrogen tank 2. By repeating the above procedure 3 to 5 times, the effect of prolonged impact on the hydrogen tank liner's aging will be simulated. This procedure constitutes one test cycle, and after each test cycle, the performance of the hydrogen tank liner will be evaluated and the test data recorded. The above test cycle will then be repeated until hydrogen gas leakage occurs in hydrogen tank 2, and the test data will be recorded. This will allow us to conclude the effect of impact on the liner's aging.

[0027] As the impact rod 302 strikes the hydrogen tank 2, the left side of the isolation cover 3 also comes into contact with the cylinder body of the hydrogen tank 2, and is gradually pressed against the cylinder body of the hydrogen tank 2 during the contact process. As a result, the isolation cover 3 gradually deforms and becomes tightly fitted with the cylinder body of the hydrogen tank 2, forming a sealed space between the isolation cover 3, the impact rod 302, and the cylinder body of the hydrogen tank 2. The impact rod 302 further divides this sealed space into an upper sealed space and a lower sealed space. After the impact rod 302 strikes the hydrogen tank 2, the contact is maintained for a certain period of time, and while this contact is maintained, the hydrogen gas detector 401 is controlled to draw in air, causing the gas in the sealed space to flow into the hydrogen gas detector 401 along the first guide tube 402 and the second guide tube 403, respectively, enabling detection of whether hydrogen gas is leaking. Subsequently, in the above simulation process, if there is a problem with the quality of the hydrogen tank 2, the part of the hydrogen tank 2 that was struck by the impact rod 302 will be indented inward. Simultaneously, the impact rod 302 strikes the hydrogen tank 2, and as the impact rod 302 gradually comes into close contact with the recess in the hydrogen tank 2, the isolation rod 303 comes into contact with the cylinder body of the hydrogen tank 2 and gradually slides upward along the impact surface 30201 due to the pressure from the cylinder body of the hydrogen tank 2. As a result, the partition plate 5 is pressed by the isolation rod 303 and deforms, arching upward, as shown in Figure 7. This causes the hydrogen gas inside the hydrogen tank 2 to leak from the recess in the hydrogen tank 2 into the sealed space outside the hydrogen tank 2, flowing into the hydrogen gas detector 401 along the first guide pipe 402 and the second guide pipe 403, and the hydrogen gas detector 401 detects that the hydrogen tank 2 is leaking. The hydrogen gas detector 401 then transmits a signal to the control center, which in turn transmits the signal to the second gas pump 209 via the control center, instructing the second gas pump 209 to perform direct extraction. As a result, the hydrogen gas leaking in the enclosed space flows into the second gas pump 209 along the first connecting pipe 202 and the second connecting pipe 203, and further flows into the second collection tank 208 along the gas transport pipe 207. This enables the collection of the leaked hydrogen gas and prevents it from leaking into the air and affecting the physical and mental health of workers.

[0028] Subsequently, the impact rod 302 remains in contact with the hydrogen tank 2, and the impact surface 30201 on the impact rod 302 adheres tightly to the recess in the hydrogen tank 2, thereby blocking the hydrogen gas leak point located in the recess of the hydrogen tank 2. This prevents the recess in the hydrogen tank 2 from rupturing widely and causing hydrogen gas to leak from the hydrogen tank 2 over a wide area, thus avoiding the risk of the hydrogen concentration in the sealed space rising and the leaked hydrogen exploding, which would endanger the safety of the workers.

[0029] During the process of the impact rod 302 impacting the hydrogen tank 2, a large amount of impact heat is generated at the point of impact where both the hydrogen tank 2 and the impact rod 302 strike. Therefore, when the hydrogen tank 2 is impacted by the impact rod 302 and dented, the impact heat is usually located at the point where the impact surface 30201 is in close contact with the dent in the hydrogen tank 2. When the impact surface 30201 is in close contact with the dent in the hydrogen tank 2, the dent in the hydrogen tank 2 is sealed by the impact surface 30201, thus preventing the leaked hydrogen gas in the sealed space from coming into wide contact with the area where the impact heat is generated between the impact surface 30201 and the dent in the hydrogen tank 2. This prevents the leaked hydrogen gas from being heated by the impact heat, which could then ignite and cause an explosion, thus avoiding a threat to the safety of workers. However, after the impact rod 302 strikes the hydrogen tank 2, the impact heat generated on the impact surface 30201 is not only present in close contact with the indentation in the hydrogen tank 2, but also diffuses along the impact surface 30201 to other parts of the impact rod 302, forming a heat-generating surface 30202. The impact heat present on this heat-generating surface 30202 still poses a risk of causing the hydrogen gas to explode. Furthermore, the hydrogen gas leakage location in the hydrogen tank 2 is not limited to the indentation in the hydrogen tank 2, but also to the area around the cylinder body of the hydrogen tank 2 after it has indented inward, where it is prone to tearing and forms a leakage point 2001. The upper sealed space will be described below. When the indentation in the hydrogen tank 2 comes into close contact with the impact surface 30201, if the indentation in the hydrogen tank 2 is shallow, the isolation rod 303 will not come into contact with the cylinder body of the hydrogen tank 2. The isolation rod 303 and the partition plate 5 will shield the heat-generating surface 30202, preventing the risk of hydrogen gas leaking from the leak 2001 coming into contact with the heat-generating surface 30202, causing the hydrogen gas to heat up, ignite, and explode, thus avoiding a threat to the safety of workers.

[0030] Subsequently, when the indentation of the hydrogen tank 2 is in close contact with the impact surface 30201, the guide plate 4 is pressed against the cylinder body of the hydrogen tank 2 and gradually deforms. This maintains a state in which the guide plate 4 and the cylinder body of the hydrogen tank 2 are in constant contact. When hydrogen gas leaks from the leak 2001, the pressure between the cylinder body of the hydrogen tank 2 and the guide plate 4 gradually increases, and this increased pressure pushes and deforms the guide plate 4, causing the contact point with the guide plate 4 to warp upward. As a result, the guide plate 4 and the hydrogen tank 2 separate from each other, and a passage is formed between them. As a result, the hydrogen gas leaking from the leak section 2001 flows into the sealed space along the passage, and as the width of the passage gradually decreases, the flow velocity of the leaked hydrogen gas is accelerated as it passes through the passage, making it easier for the leaked hydrogen gas in the upper sealed space to flow upward, and the leaked hydrogen gas rapidly flows into the first gas pump 201 along the first connecting pipe 202, and further into the first collection tank 205. This improves the collection effect of the leaked hydrogen gas by the first collection tank 205.

[0031] [Example 2] As shown in Figures 5 to 9, Example 2 will be described. The description of the configuration is the same as that of Example 1 and will be omitted as it is redundant. Example 2 further includes a first baffle 304 and a second baffle 305, with the first baffle plate 304 fixed to the partition plate 5 located on the upper side, and the second baffle 305 fixed to the guide plate 4 located on the lower side.

[0032] When hydrogen tank 2 is subjected to an impact, fragments and debris are generated. If hydrogen tank 2 is subjected to an impact and a leak occurs, the fragments and debris are drawn into the second gas pump 209 along with the leaked hydrogen gas. However, because the fragments have a large mass and a larger volume than the debris, they are not drawn into the second gas pump 209. On the other hand, because the debris has a small mass and volume, it is easily drawn into the second gas pump 209, and in the long term, it is likely to cause blockage of the second gas pump 209. Therefore, the first baffle plate 304 and the second baffle 305 are added. When fragments and debris generated by the impact of hydrogen tank 2 are scattered forward, in the upper sealed space, the fragments and debris are blocked by the guide plate 4 and the partition plate 5. The fragments do not fall directly downward and are not drawn into the second gas pump 209 along with the hydrogen gas. The debris blocked by the guide plate 4 falls onto the partition plate 5 and is guided by the partition plate 5 to accumulate at the angle between the partition plate 5 and the first baffle 304. On the other hand, in the lower sealed space, the guide plate 4 and partition plate 5 prevent fragments and debris from falling directly downwards and being sucked into the second gas pump 209 along with the hydrogen gas. Debris falls onto the guide plate 4 and is guided by the guide plate 4 to accumulate at the angle between the guide plate 4 and the second baffle 305. This enables the collection of debris, prevents the first connecting pipe 202 and the second connecting pipe 203 from being blocked by debris, and avoids a decrease in the flow velocity of hydrogen gas in the first connecting pipe 202 and the second connecting pipe 203, which would affect the collection of leaked hydrogen gas by the device.

[0033] The first baffle 304 is provided with a first restricting section 30401. The second baffle 305 is provided with a second restricting section 30501. When hydrogen gas leaks, the first restricting section 30401 restricts the debris, preventing the debris from being entangled in the hydrogen gas and flowing into the second gas pump 209. Similarly, the second restricting section 30501 also restricts the debris, preventing it from being entangled in the hydrogen gas and flowing into the second gas pump 209, thereby improving the debris collection effect at the debris collection location.

[0034] The second baffle 305 is provided with a guide surface 30502. The guide surface 30502 guides the flow of hydrogen gas away from the angle between the guide plate 4 and the second baffle 305, thereby preventing the hydrogen gas flow from affecting debris collection. This also prevents the debris from being caught in the hydrogen gas and flowing into the second gas pump 209, causing blockage and affecting the collection effectiveness of the device against leaked hydrogen gas.

[0035] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are solely for the purpose of illustrating the principles of the embodiments of the present invention and should not be construed as limiting the scope of protection of the embodiments of the present invention. Based on these descriptions, those skilled in the art can, without creative effort, conceive of other specific embodiments of the embodiments of the present invention, and these embodiments also fall within the scope of protection of the embodiments of the present invention. [Explanation of Symbols]

[0036] 1: Test bench, 2: Hydrogen tank, 2001: Leakage point, 3: Isolation cover, 4: Guide plate, 5: Partition plate, 101: Protective cover, 102: Protective door, 201: First gas pump, 202: First connecting pipe, 203: Second connecting pipe, 204: Exhaust pipe, 205: First collection tank, 206: Intake pipe, 207: Gas transport pipe, 208: Second collection tank, 209: Second gas pump 301: Drive member, 302: Impact rod, 30201: Impact surface, 30202: Heating surface, 303: Isolation rod, 304: First baffle, 30401: First limiting section, 305: Second baffle, 30501: Second limiting section, 30202: Guide surface, 401: Hydrogen gas detector, 402: First guide tube, 403: Second guide tube, 501: Pulley, 502: Handrail.

Claims

1. A hydrogen aging test apparatus for an in-vehicle hydrogen tank liner, comprising a test stand (1) and a protective assembly connected to the test stand (1), A hydrogen aging test assembly is connected to a test stand (1) to simulate hydrogen aging of a hydrogen tank liner, An impact simulation assembly is provided on the test stand (1) to simulate the state in which the hydrogen tank is subjected to impact, An isolation cover (3) is connected to the impact simulation assembly to collect leaked hydrogen gas, Connected to the impact simulation assembly, a plurality of guide plates (4) made of elastic plate material, Each guide plate (4) is connected to a plurality of partition plates (5) made of elastic plate material, which separate the leaked hydrogen gas from the shock heat. A hydrogen gas detection assembly is connected to a protective assembly to detect the presence or absence of hydrogen gas leaks, A hydrogen gas collection assembly is connected to the test stand (1) to collect leaked hydrogen gas, A movable assembly connected to the test stand (1) for moving the test stand (1) to the test position, A hydrogen aging test apparatus for automotive hydrogen tank liners, further comprising the following:

2. The hydrogen aging test apparatus for an in-vehicle hydrogen tank liner according to claim 1, characterized in that the protective assembly includes a protective cover (101) fixed to a test stand (1) and a plurality of protective doors (102) that are damped and slidably connected to the protective cover (101).

3. The hydrogen aging test assembly is characterized by comprising a first gas pump (201) fixed to a test stand (1), an intake pipe (206) fixed to the intake port of the first gas pump (201), a first collection tank (205) fixed to the upper side of a protective cover (101) for collecting hydrogen gas, and an exhaust pipe (204) with one end fixed to the exhaust port of the first gas pump (201) and the other end communicating with the first collection tank (205), as described in claim 2, for hydrogen aging test apparatus for an on-board hydrogen tank liner.

4. The hydrogen gas collection assembly comprises a second gas pump (209) fixed to a test stand (1), a first connecting pipe (202) having one end communicating with a first intake port of the second gas pump (209) and the other end communicating with the upper left side of an isolation cover (3), a second connecting pipe (203) having one end communicating with a second intake port of the second gas pump (209) and the other end communicating with the lower left side of an isolation cover (3), a second collection tank (208) fixed to the upper side of a first collection tank (205) for collecting leaked hydrogen gas, and a gas transport pipe (207) having one end communicating with the exhaust end of the second gas pump (209) and the other end communicating with the second collection tank (208), characterized in that it is a hydrogen aging test apparatus for an on-board hydrogen tank liner according to claim 3.

5. The impact simulation assembly includes a drive member (301) fixed to a test stand (1) with an extendable end fixed to the right side of the isolation cover (3), an impact rod (302) having an impact surface (30201) on its rear side and fixed to the left side of the isolation cover (3), and a plurality of isolation rods (303) made of thermal insulation material slidably connected to the impact rod (302), None of the partition plates (5) come into contact with the impact surface (30201). The hydrogen aging test apparatus for an in-vehicle hydrogen tank liner according to claim 4, characterized in that each isolation rod (303) is fixed to an adjacent partition plate (5).

6. The hydrogen aging test apparatus for an in-vehicle hydrogen tank liner according to claim 3, characterized in that the hydrogen gas detection assembly includes a hydrogen gas detector (401) fixed to the inner front part of a protective cover (101), a first guide tube (402) having one end communicating with the intake port of the hydrogen gas detector (401) and the other end communicating with the upper left side of the isolation cover (3), and a second guide tube (403) having one end communicating with the first guide tube (402) and the other end communicating with the lower left side of the isolation cover (3).

7. The hydrogen aging test apparatus for an in-vehicle hydrogen tank liner according to claim 5, characterized in that the movable assembly includes a plurality of pulleys (501) rotatably connected to the underside of the test stand (1) and a handrail (502) fixed to the left side of the test stand (1).

8. The hydrogen aging test apparatus for an in-vehicle hydrogen tank liner according to claim 5, further comprising a first baffle (304) fixed to an upper partition plate (5) and a second baffle (305) fixed to a lower guide plate (4).

9. The hydrogen aging test apparatus for an in-vehicle hydrogen tank liner according to claim 8, characterized in that the first baffle (304) is provided with a first limiting portion (30401), and the second baffle (305) is provided with a second limiting portion (30501).

10. The hydrogen aging test apparatus for an in-vehicle hydrogen tank liner according to claim 9, characterized in that a guide surface (30502) is provided on the second baffle (305).

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