Hydrogen coloring device and fuel cell vehicle including the same

Abstract

A hydrogen coloring device includes a hydrogen tank, a fuse valve connected to the hydrogen tank, a colorant tank connected to the hydrogen tank via the fuse valve and containing a colorant, an injector connected to the colorant tank and mixing hydrogen discharged from the hydrogen tank through the fuse valve with the colorant, and a branch path connected to the fuse valve and the colorant tank and branching at least a part of the hydrogen discharged from the hydrogen tank through the fuse valve and introducing it into the colorant tank, wherein the hydrogen discharged from the hydrogen tank through the fuse valve changes at least a part of the internal pressure of the colorant tank.

Description

Technical Field

[0001] This disclosure relates to a hydrogen coloring device and a fuel cell vehicle including a hydrogen coloring device. Background Technology

[0002] Cars that run on fuels such as gasoline have a significant environmental impact due to exhaust emissions. Therefore, to address this issue, the development of fuel cell vehicles, which reduce environmental impact, has been progressing in recent years. In a fuel cell vehicle, hydrogen is supplied to one electrode (fuel electrode) and oxygen to the other electrode (air electrode). The electricity generated within the fuel cell through the chemical reaction of hydrogen and oxygen powers the motor, thus propelling the vehicle.

[0003] Existing technical documents Patent documents Patent Document 1: Japanese Patent Application Publication No. 2005-071830 Summary of the Invention

[0004] The technical problem that the invention aims to solve In the event of a fire in a fuel cell vehicle, the hydrogen gas needs to be safely discharged to prevent the hydrogen tank, exposed to high temperatures, from exploding. At this time, the discharged hydrogen gas and its flame are colorless and transparent, making them visually undetectable. While there are instances where surrounding combustibles and sea salt particles are entrained in the flame, making the hydrogen visible, this is not always possible depending on the conditions. Therefore, Japanese Patent Application Publication No. 2022-146893 (hereinafter referred to as the "Publication") discloses a structure that mixes a colorant that colors the hydrogen flame using a flame test with the discharged hydrogen gas, thereby coloring the discharged hydrogen flame. However, the first embodiment of the fire prevention device in the Publication requires a pressurized container for discharging the colorant, which is costly. On the other hand, the second embodiment of the fire prevention device in the Publication discloses a technique for discharging the colorant using the Venturi effect; however, depending on the pressure loss in the hydrogen discharge pipe, the pressure inside the hydrogen discharge pipe may be higher than the pressure inside the colorant tank, thus potentially preventing the achievement of stable hydrogen flame coloring.

[0005] This disclosure was made in view of the above circumstances, and the purpose of this disclosure is to provide a hydrogen coloring device and a fuel cell vehicle including the hydrogen coloring device, which can control the hydrogen or hydrogen flame discharged from the hydrogen tank regardless of the pressure loss of the hydrogen discharge pipeline.

[0006] Technical solutions for solving technical problems To address the aforementioned issues, according to a certain aspect of this disclosure, a hydrogen coloring apparatus is provided, comprising: a hydrogen tank; a fusible valve connected to the hydrogen tank; a colorant tank connected to the hydrogen tank via the fusible valve and containing a colorant; an injector connected to the colorant tank and mixing hydrogen discharged from the hydrogen tank through the fusible valve with the colorant; and a branch line connected to the fusible valve and the colorant tank, branching at least a portion of the hydrogen discharged from the hydrogen tank through the fusible valve and introducing it into the colorant tank, wherein the hydrogen discharged from the hydrogen tank through the fusible valve causes at least a portion of the internal pressure of the colorant tank to change.

[0007] Invention Effects As described above, according to this disclosure, a hydrogen coloring device and a fuel cell vehicle including the hydrogen coloring device can be provided, the hydrogen coloring device being able to control the hydrogen or hydrogen flame discharged from the hydrogen tank regardless of the pressure loss of the hydrogen discharge pipeline. Attached Figure Description

[0008] Figure 1 This is a schematic diagram illustrating a structural example of a fuel cell vehicle.

[0009] Figure 2 This is a schematic diagram showing an example of the structure of a hydrogen coloring device.

[0010] Figure 3 This is a cross-sectional view showing an example of the structure of a colorant container.

[0011] Figure 4 This is a cross-sectional view showing an example of the structure of an injector.

[0012] Figure 5 This is a cross-sectional view showing a modified example of the structure of a colorant container.

[0013] Figure 6 This is a cross-sectional view showing a modified example of the structure of a colorant container.

[0014] Figure 7 This is a cross-sectional view showing a modified example of the injector's structure.

[0015] Figure 8 This is a cross-sectional view showing a modified example of the injector's structure. Detailed Implementation

[0016] 1. Implementation Method A preferred embodiment of the present disclosure will now be described with reference to the accompanying drawings. Note that the dimensions and scales of the parts in the drawings differ appropriately from actual dimensions. Furthermore, the drawings are schematic representations for ease of understanding. The scope of this disclosure is not limited to the embodiments illustrated below, unless otherwise specified.

[0017] The following describes one embodiment of applying the hydrogen coloring device of this disclosure to a fuel cell vehicle (hereinafter referred to as "FCV") equipped with a high-pressure hydrogen tank (hereinafter referred to as "hydrogen tank"). Figure 1 As shown, the FCV (fuel cell vehicle) of this disclosure supplies hydrogen contained in a hydrogen tank 10 and air (oxygen) drawn in from the atmosphere to the fuel cell FC, and uses electrical energy generated by the electrochemical reaction of hydrogen and oxygen within the fuel cell FC to drive the motor MR. The FCV of this disclosure includes a hydrogen coloring device 100, which is capable of controlling the hydrogen or hydrogen flame discharged from the hydrogen tank 10 independently of the pressure loss of the hydrogen discharge pipe R3 described later.

[0018] Figure 2 This is a schematic diagram showing a structural example of a hydrogen coloring apparatus 100. The hydrogen coloring apparatus 100 includes a hydrogen tank 10, a fusible valve 20, a colorant tank 30, an injector 40, and a branch line 50. In addition to the above-mentioned elements, the hydrogen coloring apparatus 100 of this embodiment also includes flow paths R1 to R3 and a valve V.

[0019] The hydrogen tank 10 is, for example, an elongated oval-shaped tank. The hydrogen tank 10 contains hydrogen supplied to the fuel cell (FC). The shell of the hydrogen tank 10 has a three-layer structure: an inner lining layer, a CFRP (carbon fiber reinforced plastic) layer, and a GFRP (glass fiber reinforced plastic) layer. The inner lining layer is, for example, made of a resin material such as polyethylene resin or polypropylene resin. The CFRP layer is the middle layer of the three-layer structure, wound around the inner lining layer. The CFRP layer is, for example, made of a resin material such as epoxy resin or unsaturated polyester resin. The GFRP layer is the outer layer of the three-layer structure, wound around the CFRP layer.

[0020] Hydrogen tank 10 is connected to flow path R1. A valve V is installed on flow path R1. Valve V is a valve mechanism that switches the flow path R1 on / off. When valve V is in the open state, high-pressure hydrogen discharged from hydrogen tank 10 is supplied to the fuel cell FC of the FCV via flow path R1. When valve V is in the closed state, valve V cuts off the hydrogen supply from hydrogen tank 10 to the fuel cell FC.

[0021] like Figure 2As shown, the fusible plug valve 20 is connected to flow path R2, which branches off from flow path R1, and branch path 50. The fusible plug valve 20 is connected to the hydrogen tank 10 via flow path R1 and flow path R2. In other words, flow path R2 has the function of introducing hydrogen from the hydrogen tank 10 into branch path 50 via the fusible plug valve 20. As the fusible plug valve 20, a conventional fusible plug can be used, in which the fusible part melts at a specified temperature when the internal pressure of the hydrogen tank 10 rises, thereby relieving the internal pressure to the outside of the container. Alternatively, in this disclosure, a conventional spring-loaded safety valve or the like can be used instead of the fusible plug valve 20. In the closed state, the fusible plug valve 20 cuts off the supply of high-pressure hydrogen from the hydrogen tank 10 to branch path 50. However, for example, when the FCV is exposed to excessively high temperatures due to being caught in a fire, the fusible part (e.g., a fusible alloy) of the fusible plug valve 20 melts and opens the valve. When the fusible plug valve 20 is opened, the high-pressure hydrogen gas discharged from the hydrogen tank 10 is discharged outside the FCV via the injector 40. In other words, the high-pressure hydrogen gas is discharged outside the FCV due to the melting of the fusible alloy, thus the fusible plug valve 20 functions as a safety valve to prevent the hydrogen tank 10 from rupturing, exploding, or otherwise malfunctioning.

[0022] in addition, Figure 2 The fusible plug valve 20 shown is connected to the hydrogen tank 10 via flow paths R1 and R2, but is not limited to this. In this embodiment, the fusible plug valve 20 may also be directly installed on the neck valve (not shown) of the hydrogen tank 10.

[0023] There are no particular restrictions on the fusible alloys used in the fusible valve 20. For example, it can be a low-melting-point alloy with zinc, indium, gallium, tin, bismuth or lead as the main components, or an alloy such as wood metal, field's metal, rose's metal or solder.

[0024] Figure 3 This is a cross-sectional view showing a structural example of the colorant tank 30. The colorant tank 30 is connected to the branch line 50 and the hydrogen exhaust pipe R3. The colorant tank 30 contains, for example, a colorant capable of coloring hydrogen through a flame test. The colorant contained in the colorant tank 30 is discharged from the colorant tank 30 and introduced into the hydrogen exhaust pipe R3 under the pressure or synergistic effect of the hydrogen supplied to the colorant tank 30 through the branch line 50. This synergistic effect refers to the synergistic effect of the negative pressure generated by the injector 40 in the hydrogen exhaust pipe R3 and the pressure of the hydrogen. Figure 3 As shown, the colorant container 30 preferably has a dual structure. That is, the colorant container 30 has an outer layer 31, an inner layer 32 contained in the outer layer 31, and a space 33 formed by the outer layer 31 and the inner layer 32.

[0025] The outer layer 31 is connected to the branch line 50 and the hydrogen exhaust pipe R3. The outer layer 31 houses at least a portion of the inner layer 32. The outer layer 31 is, for example, made of a rigid material capable of suppressing damage when an external impact is applied to the FCV. Examples of such rigid materials include conventional metals or fiber-reinforced plastics. Steel or flame-retardant CFRP, which are materials that combine flame retardancy and rigidity, are particularly preferred.

[0026] The inner layer 32 is connected to the hydrogen exhaust pipe R3. The internal space 32R (first space) of the inner layer 32 is connected to the suction port 40b of the injector 40 (described later) via the hydrogen exhaust pipe R3. On the other hand, in this embodiment, the internal space 32R is not directly connected to the branch line 50, and the internal space 32R is not connected to the branch line 50. The inner layer 32 is made of a material with lower rigidity than the outer layer 31. In particular, in this embodiment, the inner layer 32 is preferably made of a soft material that can contract due to the hydrogen supplied from the branch line 50 into the space 33. Furthermore, the inner layer 32 is preferably made of a material that combines flame retardancy and liquid sealing capabilities. Specifically, the material of the inner layer 32 is, for example, a resin-laminated flame-retardant fabric.

[0027] The location of the colorant tank 30 within the FCV is not particularly limited, but it is preferably located close to the hydrogen tank 10. Alternatively, in this embodiment, the hydrogen tank 10 and the colorant tank 30 may be adjacent to each other, or other components such as a tank housing may be placed between the hydrogen tank 10 and the colorant tank 30.

[0028] The inner layer 32 contains a colorant. This colorant is, for example, a solution containing at least one of lithium, sodium, potassium, rubidium, cesium, calcium, strontium, barium, radium, molybdenum, copper, gold, boron, gallium, indium, thallium, tin, lead, phosphorus, and antimony. Preferably, the colorant is an aqueous solution of an element listed above that is soluble in water.

[0029] There is no particular limitation on the amount of colorant contained in the inner layer 32, for example, it is set to an amount that will not be depleted before the hydrogen is completely discharged from the hydrogen tank 10 filled with hydrogen.

[0030] like Figure 3 As shown, space 33 (the second space) is defined by the inner surface of outer layer 31 and the outer surface of inner layer 32. Space 33 is connected to branch line 50. On the other hand, in this embodiment, space 33 is not directly connected to hydrogen discharge pipe R3 and is not connected to hydrogen discharge pipe R3. Another portion G2 of the high-pressure hydrogen discharged from hydrogen tank 10 through fusible valve 20 is supplied to space 33 via branch line 50. Thus, hydrogen G2 (refer to) discharged from hydrogen tank 10 through fusible valve 20 Figure 2This causes at least a portion of the internal pressure of the colorant container 30 to change. In other words, hydrogen gas G2 causes a change (increase) in the internal pressure of space 33, which is part of the internal space of the colorant container 30, thereby pressing down on the inner layer 32. Figure 3 (The direction of the arrow). As described above, the inner layer 32 is made of a soft material, so the inner layer 32 contracts due to the hydrogen gas G2, and the colorant in the internal space 32R is discharged to the injector 40 side through the hydrogen gas exhaust pipe R3.

[0031] Figure 4 This is a cross-sectional view showing a structural example of the injector 40. (See diagram below.) Figure 4 As shown, the injector 40 has an inlet 40a, a suction port 40b, an outlet 40c, and a nozzle 40N. A portion of the high-pressure hydrogen gas G1 discharged from the fusible valve 20 (hereinafter referred to as hydrogen G1) is supplied to the inlet 40a as the driving fluid of the injector 40. Inside the injector 40, the static pressure decreases because the hydrogen gas G1 is injected at high speed from the nozzle 40N to the outlet 40c.

[0032] Due to the aforementioned decrease in static pressure, the colorant, acting as an attracting fluid, is drawn from the suction port 40b to the outlet 40c side. Near the confluence of the inlet 40a and the suction port 40b, hydrogen gas G1, injected at high speed from the nozzle 40N, mixes with the colorant drawn from the suction port 40b towards the outlet 40c side. The mixed fluid containing hydrogen gas G1 and the colorant (hereinafter referred to as the "mixed fluid") is ejected from the outlet 40c outside the FCV.

[0033] In other words, the injector 40 of this embodiment attracts a colorant while simultaneously jetting hydrogen G1 at high speed from the nozzle 40N, thereby mixing the hydrogen G1 and the colorant to generate a mixed fluid. The injector 40 then ejects this mixed fluid from the nozzle 40c outside the FCV. The mixed fluid ejected from the nozzle 40c outside the FCV is colored by the flame test of the colorant contained in the mixed fluid. As a result, people present around the FCV can see hydrogen leaking from the FCV and thus escape from the FCV. However, the injector 40 can be any structure capable of mixing the colorant and hydrogen, and its structure and mechanism are not limited to the above-described embodiment and can employ conventional techniques, and it does not necessarily have to utilize static pressure reduction.

[0034] There are no particular restrictions on the location of the injector 40 on the FCV, but it is preferred to be located near the hydrogen tank 10 and the colorant tank 30.

[0035] like Figure 2 As shown, branch road 50 ( Figure 2The thick solid line in the diagram connects to the fusible plug valve 20, the colorant tank 30, and the injector 40. Branch line 50 guides the hydrogen gas G1 discharged from the fusible plug valve 20 to the injector 40.

[0036] Additionally, in this embodiment, branch line 50 guides another portion G2 (hereinafter referred to as hydrogen G2) of the high-pressure hydrogen discharged from the fusible valve 20 to the colorant tank 30. Therefore, the pressure inside the colorant tank 30 is greater than the pressure inside the injector 40, such as... Figure 3 As shown, the inner layer 32 of the colorant tank 30 is compressed in the direction of the arrow by hydrogen gas G2. Therefore, the colorant contained in the inner layer 32 is pressurized to the suction port 40b of the injector 40 via the hydrogen exhaust pipe R3. Thus, even if the FCV's attitude changes due to external impacts, or if the hydrogen exhaust pipe R3 connecting the injector 40 and the colorant tank 30 is too long, causing increased pressure loss, or if the internal pressure of the injector 40 increases due to the length of the hydrogen exhaust pipe R3, making it difficult for the injector 40 to attract colorant, the colorant can still be reliably supplied from the colorant tank 30 to the injector 40. Therefore, compared to the case where the pressure inside the colorant tank 30 does not increase, the stability of the mixed fluid ejected from the injector 40 is improved.

[0037] 2. Variations The embodiments of this disclosure have been described above, but this disclosure is not limited to the above embodiments and various modifications can be made. Specific variations that can be made from the above embodiments are shown below.

[0038] [Variation Example 1] Figure 5 This is a cross-sectional view showing a modified example of the structure of the colorant container 310. The colorant container 310 has an inner layer 312, an outer layer 311 that contains the inner layer 312, and a space 313 formed by the inner layer 312 and the outer layer 311.

[0039] The inner layer 312 is connected to the branch line 50. Another portion G2 of the high-pressure hydrogen discharged from the hydrogen tank 10 via the fusible valve 20 is supplied to the inner layer 312. The inner layer 312 is made of a soft material that is less rigid than the outer layer 311 and expands due to the high-pressure hydrogen supplied from the branch line 50. As in the embodiment described above, a flame-retardant fabric laminated with resin can be cited as such a soft material.

[0040] The outer layer 311 houses the inner layer 312 and is connected to the injector 40 via a hydrogen exhaust pipe R3. The outer layer 311 is made of a rigid material that can withstand damage even when an impact force is applied to the FCV. Examples of such rigid materials include common metals or fiber-reinforced plastics.

[0041] Space 313 (second space) is defined by the inner surface of the outer layer 311 and the outer surface of the inner layer 312, and is connected to the injector 40 via the hydrogen exhaust pipe R3. Space 313 contains the colorant of the above embodiment.

[0042] In Modification 1, branch 50 introduces high-pressure hydrogen (hydrogen G2) supplied from hydrogen tank 10 via fusible valve 20 into the internal space (first space) of inner layer 312. Due to the expansion of inner layer 312... Figure 5 (in the direction of the arrow), therefore the pressure inside the outer layer 311 becomes greater than the pressure inside the injector 40. In other words, hydrogen G2 increases the internal pressure of space 313. The colorant contained in space 313 is then forced through the hydrogen exhaust pipe R3 to the suction port 40b of the injector 40. Thus, as in the embodiment described above, the colorant is reliably supplied from the colorant tank 310 to the injector 40.

[0043] [Variation Example 2] Figure 6 This is a schematic diagram showing a modified example of the structure of a colorant can 320. The colorant can 320 has an outer layer 321 and a nozzle 320N disposed within the outer layer 321.

[0044] The outer layer 321 contains the same colorant as in the embodiment described above. The outer layer 321 has a nozzle 320N with one end disposed inside the outer layer 321 and the other end disposed outside the outer layer 321. The internal space of the outer layer 321 is connected to the hydrogen exhaust pipe R3 via the nozzle 320N. The outer layer 321 is made of, for example, a rigid material that can resist damage even when an impact force is applied to the FCV. Examples of such rigid materials include common metals or fiber-reinforced plastics. The nozzle 320N preferably has flexibility to move within the hydrogen tank 10 under gravity or centrifugal force. Thus, regardless of the FCV's orientation, the tip of the nozzle 320N can remain below the surface of the colorant, stably guiding the colorant to the injector 40.

[0045] In Modification 2, branch line 50 guides the hydrogen gas G2 discharged through the fusible valve 20 into the internal space of the outer layer 321. The pressure inside the outer layer 321 becomes greater than the pressure inside the injector 40 due to the inflow of hydrogen gas G2. Therefore, the colorant contained in the internal space of the outer layer 321 is forced through the hydrogen discharge pipe R3 to the suction port 40b of the injector 40. Thus, as in the embodiment described above, the colorant is reliably supplied from the colorant tank 320 to the injector 40.

[0046] [Variation Example 3] Figure 7This is a simplified schematic diagram illustrating the structure of a modified branch pipe 410, and is a cross-sectional view of the branch pipe 410. In the above embodiment, the branch pipe 410 may be used instead of the injector 40. The branch pipe 410 has a melting component inside, which also functions as the aforementioned fusible plug valve 20. Therefore, when the branch pipe 410 is used instead of the injector 40, the fusible plug valve 20 can be omitted as needed. Figure 7 As shown, branch pipe 410 has melting components 411 and 412. Melting component 411 is disposed within flow path 413 of branch pipe 410, blocking the inflow of hydrogen G1 into flow path 413. Melting component 412 is disposed within flow path 414 of branch pipe 410, blocking the inflow of colorant. Figure 7 As shown, the molten components 411 and 412 are integrally formed within the branch pipe 410. The molten components 411 and 412 are, for example, made of a material that melts when a predetermined temperature is reached. The molten components 411 and 412 may be made of a fusible alloy used in the fusible valve 20 of the above embodiment. After the molten components 411 and 412 melt, the flow paths 413 and 414 are opened, and the mixed fluid of hydrogen and colorant is discharged outside the FCV. According to Modification 3, since the fusible valve 20 can be omitted, it is cost-effective.

[0047] [Variation Example 4] Figure 8 This is a schematic diagram showing a modified example of the injector 510, and a cross-sectional view of the injector 510. In the above embodiment, the injector 510 can be used instead of the injector 40. In this case, the fusible plug valve 20 can be omitted as needed. Figure 8 As shown, the injector 510 has melting components 511 and 512. Except for the melting components 511 and 512, the injector 510 has the same structure as the injector 40 of the above embodiment. The melting component 511 is disposed within the flow path 513, where hydrogen G1 flows as the driving fluid of the injector 510, and blocks the flow path 513. The melting component 512 is disposed within the flow path 514, where the colorant flows as the attracting fluid of the injector 510, and blocks the flow path 514. The melting components 511 and 512 are made of a material that melts upon reaching a predetermined temperature. The melting components 511 and 512 may be made of a fusible alloy as described in the above embodiment. After the melting components 511 and 512 melt, the flow paths 513 and 514 are opened, and the injector 510 functions in the same way as the injector 40 of the above embodiment. When the fusible plug valve 20 is omitted, the molten component 511 discharges high-pressure hydrogen gas outside the FCV by melting, thereby acting as a safety valve to prevent the hydrogen tank 10 from rupturing or exploding. According to Modification 4, since the fusible plug valve 20 can be omitted, it is cost-effective.

[0048] [Variation Example 5] The injector 40 in the above embodiment, or the pipeline located further downstream of the injector 40, may also have an alarm. This alarm, for example, is installed at the nozzle 40c and sounds when the mixed fluid is ejected from the injector 40. Thus, even if the mixed fluid ejected from the injector 40 does not undergo a flame test for some reason and therefore does not show color, people present around the FCV can be aware of the hydrogen leak from the FCV and can escape from it.

[0049] [Variation Example 6] The colorant in the above embodiment is a solution containing elements that undergo a flame test, but it is not limited to this. It can also be replaced with, or colored ink or colored water (water that is colored before combustion) can be added to the solution. Therefore, even if the mixed fluid ejected from the injector 40 does not ignite, the diffusion range of the mixed fluid ejected from the injector 40 (e.g., a mixture of colored ink and hydrogen G1, or a mixture of colored water and hydrogen G1) can be controlled.

[0050] [Variation Example 7] The colorant in the above embodiments may also contain flame-suppressing components. Therefore, even if the mixed fluid ejected from the injector 40 ignites, early fire suppression can be expected. In Modification 7, as the flame-suppressing component, a conventional fire extinguishing agent capable of dealing with hydrogen flames can be used, such as ammonium phosphate.

[0051] 3. Supplementary Explanation The hydrogen coloring device illustrated in the above embodiments can also be applied to mobile vehicles powered by hydrogen, which are different from fuel cell vehicles. There are no particular limitations on the uses of this disclosure.

[0052] Furthermore, the effects described in this specification are merely illustrative or exemplary, and not limiting. That is, those skilled in the art can achieve other apparent effects from the description of this specification, either simultaneously with or in lieu of the effects described above.

[0053] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings, but the technology of this disclosure is not limited to the above embodiments. Those skilled in the art to which this disclosure pertains will obviously conceive of various modifications or alterations within the scope of the technical concept set forth in the claims, and it should be understood that these modifications or alterations also fall within the technical scope of this disclosure.

[0054] Symbol Explanation 10... Hydrogen tank 20……Fusible Plug Valve 30, 310, 320... colorant cans 31, 311, 321... outer layer 32, 312... Inner layer 40... ejector 50... branch roads 100……Hydrogen coloring apparatus.

Claims

1. A hydrogen coloring apparatus, comprising: Hydrogen cylinder; A fusible valve, which is connected to the hydrogen tank; A colorant container, which is connected to the hydrogen container via the fusible valve, and contains the colorant; An injector, which is connected to the colorant tank, mixes the hydrogen gas discharged from the hydrogen tank through the fusible valve with the colorant; as well as A branch circuit, connected to the fusible valve and the colorant tank, branches off at least a portion of the hydrogen gas discharged from the hydrogen tank through the fusible valve and introduces it into the colorant tank. The hydrogen gas discharged from the hydrogen tank through the fusible valve causes at least a portion of the internal pressure of the colorant tank to change.

2. The hydrogen coloring apparatus according to claim 1, in, The branch path is also connected to the injector. By introducing a portion of the hydrogen gas discharged from the fusible valve into the injector, the colorant contained in the colorant tank is attracted to the injector.

3. The hydrogen coloring apparatus according to claim 1 or 2, in, The colorant container includes: The inner layer, which is connected to the injector; An outer layer that houses the inner layer and connects to the branch path; and The second space is defined by the outer layer and the inner layer. The hydrogen gas discharged from the fusible valve increases the internal pressure of the second space, thereby causing the colorant contained in the first space, which is the inner layer, to be discharged.

4. The hydrogen coloring apparatus according to claim 1 or 2, in, The colorant container includes: The inner layer, which is connected to the branch road; The outer layer, which is connected to the injector; and The second space, defined by the outer and inner layers, contains the colorant. The hydrogen gas discharged from the fusible valve increases the internal pressure of the first space, which is the inner layer, thereby causing the colorant contained in the second space to be discharged.

5. The hydrogen coloring apparatus according to claim 1 or 2, in, The colorant is a colorant capable of undergoing a flame test.

6. The hydrogen coloring apparatus according to claim 1 or 2, in, The colorant container is located near the hydrogen container.

7. A fuel cell vehicle comprising the hydrogen coloring device as described in claim 1 or 2.

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