Hydrogen filling apparatus

Abstract

The present invention relates to a hydrogen filling apparatus. The hydrogen filling apparatus comprises: a hydrogen supply unit for supplying hydrogen; a hydrogen guide unit connected to the hydrogen supply unit to guide hydrogen; and a hydrogen injection unit connected to the hydrogen guide unit to inject hydrogen passing through the hydrogen guide unit into an object to be filled, wherein the hydrogen guide unit includes: a first flow path portion which connects the hydrogen supply unit to the hydrogen injection unit and guides cooled hydrogen; and a second flow path portion which connects the hydrogen supply unit to the hydrogen injection unit and guides non-cooled hydrogen.

Description

hydrogen charging device

[0001] The present invention relates to a hydrogen charging device, and more particularly, to a hydrogen charging device applicable to various vehicle types by selectively mixing and supplying cooled hydrogen and uncooled hydrogen according to a charging target and charging stage.

[0002] A hydrogen charging system is typically a system for charging a target vehicle that operates on hydrogen as fuel. A hydrogen charging system includes a gas supply unit that supplies compressed hydrogen gas at high pressure, and a dispenser equipped with a nozzle for injecting the hydrogen gas supplied from the gas supply unit into the target vehicle.

[0003] Hydrogen gas charging is accomplished by supplying high-pressure hydrogen to a low-pressure target using a pressure difference. Overheating can occur during this process. Overheated hydrogen shortens the life of the storage container and increases the risk of explosion, so prevention is necessary. Temperature changes in hydrogen are affected by factors such as the storage capacity and storage conditions (temperature, pressure) of the target to be charged, as well as charging conditions (temperature, pressure, flow rate). The smaller the storage capacity of the target to be charged, the lower the storage pressure, and the higher the charging flow rate, the greater the temperature change. Therefore, hydrogen charging systems additionally include a flow control unit to limit the charging flow rate and a cooling unit to lower the hydrogen temperature.

[0004] The hydrogen charging process consists of a charging start stage where a connection pulse is applied through a small amount of hydrogen injection to estimate the pressure of the charging target, a main charging stage where charging continues while increasing the supply pressure, and a charging end stage where charging is stopped and residual pressure from the hose and nozzle is removed. In the charging start stage, the hydrogen storage pressure is low, so the temperature can rise rapidly due to the connection pulse, and it is necessary to supply a minimum flow rate after sufficient cooling. In the early part of the main charging stage, the amount of stored hydrogen is small, so the temperature change is large, but as the amount of stored hydrogen increases toward the latter part, the temperature change decreases.

[0005] Conventional hydrogen charging systems feature flow control valves and precoolers tailored to the storage capacity of the vehicle. These systems cool a limited flow of hydrogen and prevent overheating during charging. Precoolers, in particular, are designed to accommodate irregular charging and flow rate fluctuations, and to maintain a constant temperature (typically -40°C) by pre-cooling the hydrogen to a specific temperature, maintaining a constant level. However, peak charging loads are rare at hydrogen charging stations. Buses, in particular, operate under specific pressure ranges, requiring repeated partial charging.

[0006] However, conventional cooling methods maintain the same cooling level regardless of the charging target or charging stage, resulting in unnecessary energy loss. Furthermore, dispensers equipped with separate flow control valves and precoolers are used depending on the charging target, increasing construction and repair costs. Therefore, improvements are needed.

[0007] The background technology of the present invention is published in Korean Patent Publication No. 2022-0135441 (published on October 7, 2022, title of the invention: Hydrogen charging device and control method thereof).

[0008] The present invention has been devised to improve the above-mentioned problems, and its purpose is to provide a hydrogen charging device that reduces unnecessary cooling loss by selectively mixing and supplying cooled hydrogen and uncooled hydrogen according to the charging target and charging stage, and that can be applied to various vehicle types.

[0009] A hydrogen charging device according to the present invention comprises: a hydrogen supply unit for supplying hydrogen; a hydrogen guide unit connected to the hydrogen supply unit for guiding hydrogen; and a hydrogen injection unit connected to the hydrogen guide unit and injecting hydrogen passing through the hydrogen guide unit into a charging target; wherein the hydrogen guide unit comprises: a first flow path unit connecting the hydrogen supply unit and the hydrogen injection unit and guiding cooled hydrogen; and a second flow path unit connecting the hydrogen supply unit and the hydrogen injection unit and guiding uncooled hydrogen.

[0010] The first flow portion may include a first line portion that connects the hydrogen supply portion and the hydrogen injection portion and guides hydrogen; a first flow control portion that is formed in the first line portion and controls the flow rate of hydrogen; and a first cooling portion that is formed in the first line portion and cools hydrogen.

[0011] The first flow portion may further include a first flow detection portion formed in the first line portion and detecting the flow rate of hydrogen before moving to the first flow control portion.

[0012] The second flow portion may include a second line portion having one end connected to the first line portion connecting between the first flow detection portion and the first flow control portion, and the other end connected to the first line portion connecting between the first cooling portion and the hydrogen injection portion; and a second flow control portion formed on the second line portion and controlling the flow rate of hydrogen.

[0013] The second flow portion may further include a second check valve portion formed in the second line portion connecting the second flow control portion and the first line portion, and preventing reverse flow of hydrogen passing through the first line portion.

[0014] The second flow portion may include a second bypass line portion having one end connected to the first line portion connecting the first flow control portion and the first cooling portion, and the other end connected to the first line portion connecting the first cooling portion and the hydrogen injection portion; and a second bypass control portion formed in the second bypass line portion and controlling the flow rate of hydrogen.

[0015] The second flow portion may further include a second bypass valve portion formed in the second bypass line portion connecting the second bypass control portion and the first line portion, and preventing reverse flow of hydrogen passing through the first line portion.

[0016] Depending on the state of the charging target, hydrogen can be supplied through at least one of the first flow section and the second flow section.

[0017] Depending on the state of the charging target, an initial charging stage in which hydrogen is supplied through the first flow path, a mid-charging stage in which hydrogen is supplied through the first flow path and the second flow path, and a final charging stage in which hydrogen is supplied through the second flow path can be sequentially performed.

[0018] Depending on the state of the above charging target, the initial charging stage in which hydrogen is supplied through the first flow path may be omitted, and the intermediate charging stage in which hydrogen is supplied through the first flow path and the second flow path, and the final charging stage in which hydrogen is supplied through the second flow path may be sequentially performed.

[0019] Depending on the state of the above charging target, the initial charging stage in which hydrogen is supplied through the first flow section and the middle charging stage in which hydrogen is supplied through the first flow section and the second flow section may be omitted, and the charging may proceed to the final charging stage in which hydrogen is supplied through the second flow section.

[0020] The hydrogen charging device according to the present invention can selectively supply hydrogen through a first flow path section for guiding cooled hydrogen and a second flow path section for guiding uncooled hydrogen, thereby enabling optimized hydrogen charging according to the pressure and temperature of the charging target and improving cooling efficiency.

[0021] The hydrogen charging device according to the present invention can supply cooled hydrogen to a charging target through the first flow path in the initial charging stage.

[0022] The hydrogen charging device according to the present invention can supply a mixture of cooled hydrogen through the first flow path and uncooled hydrogen through the second flow path to the charging target during the intermediate charging stage.

[0023] The hydrogen charging device according to the present invention can supply uncooled hydrogen to a charging target through the second flow path in the final charging stage.

[0024] FIG. 1 is a schematic drawing showing a hydrogen charging device according to one embodiment of the present invention.

[0025] FIG. 2 is a drawing schematically showing a first euro section according to one embodiment of the present invention.

[0026] Figure 3 is a drawing schematically showing a second euro section according to the first embodiment of the present invention.

[0027] Figure 4 is a drawing schematically showing a second flow section according to a second embodiment of the present invention.

[0028] Figure 5 is a drawing schematically showing the hydrogen supply state through the first euro section in Figure 3.

[0029] Figure 6 is a drawing schematically showing the hydrogen supply state through the first and second sections in Figure 3.

[0030] Figure 7 is a drawing schematically showing the hydrogen supply state through the second euro section in Figure 3.

[0031] Figure 8 is a drawing schematically showing the hydrogen supply state through the first euro section in Figure 4.

[0032] Figure 9 is a drawing schematically showing the hydrogen supply state through the first and second sections in Figure 4.

[0033] Figure 10 is a drawing schematically showing the hydrogen supply state through the second euro section in Figure 4.

[0034] Hereinafter, embodiments of a hydrogen charging device according to the present invention will be described with reference to the attached drawings. In this process, the thickness of lines and the sizes of components depicted in the drawings may be exaggerated for clarity and convenience. Furthermore, the terms described below are defined based on their functions in the present invention and may vary depending on the intentions or practices of the user or operator. Therefore, the definitions of these terms should be based on the contents throughout this specification.

[0035] FIG. 1 is a schematic diagram of a hydrogen charging device according to one embodiment of the present invention. Referring to FIG. 1, a hydrogen charging device (1) according to one embodiment of the present invention includes a hydrogen supply unit (10), a hydrogen guide unit (20), and a hydrogen injection unit (30).

[0036] The hydrogen supply unit (10) can supply hydrogen. For example, the hydrogen supply unit (10) can supply stored hydrogen. The hydrogen supply unit (10) can be connected to a plurality of storage tanks and supply low-pressure or high-pressure hydrogen.

[0037] The hydrogen guide unit (20) can be connected to the hydrogen supply unit (10) to guide hydrogen. For example, the hydrogen guide unit (20) can provide hydrogen optimized for the charging target (100) by controlling the flow rate and temperature of hydrogen.

[0038] The hydrogen injection unit (30) is connected to the hydrogen guide unit (20) and can inject hydrogen that has passed through the hydrogen guide unit (20) into the charging target (100). For example, the hydrogen injection unit (30) can be a nozzle or a dispenser and can be mounted on a vehicle.

[0039] Meanwhile, the hydrogen guide section (20) may include a first flow section (50) and a second flow section (60).

[0040] The first flow path (50) connects the hydrogen supply part (10) and the hydrogen injection part (30) and can guide cooled hydrogen. For example, the first flow path (50) can cool hydrogen supplied from the hydrogen supply part (10) to a set temperature.

[0041] The second flow path (60) connects the hydrogen supply part (10) and the hydrogen injection part (30) and can guide uncooled hydrogen. For example, the second flow path (60) can guide hydrogen supplied from the hydrogen supply part (10) without changing its temperature. The second flow path (60) can be connected to the first flow path (50).

[0042] Fig. 2 is a schematic diagram illustrating a first flow section according to one embodiment of the present invention. Referring to Fig. 2, the first flow section (50) according to one embodiment of the present invention may include a first line section (51), a first flow control section (52), and a first cooling section (53).

[0043] The first line section (51) connects the hydrogen supply section (10) and the hydrogen injection section (30) and can guide hydrogen. For example, the first line section (51) can have a pipe shape that guides hydrogen.

[0044] The first flow control unit (52) is formed in the first line section (51) and can control the flow rate of hydrogen. For example, the first flow control unit (52) can control the flow rate of hydrogen passing through the first line section (51) by controlling the opening amount of the first line section (51).

[0045] The first cooling unit (53) is formed in the first line unit (51) and can cool hydrogen. For example, the first cooling unit (53) can cool hydrogen passing through the first flow control unit (52) to a set temperature.

[0046] The first flow path (50) may further include a first flow rate detection unit (54). The first flow rate detection unit (54) is formed in the first line section (51) and can detect the flow rate of hydrogen before it moves to the first flow rate control unit (52). For example, the first flow rate detection unit (54) is arranged in front of the first flow rate control unit (52), and the first flow rate control unit (52) is driven according to the value detected by the first flow rate detection unit (54) to control the flow rate of hydrogen.

[0047] In addition, the first flow section (50) may further include a first pneumatic control valve section (55). The first pneumatic control valve section (55) is formed in the first line section (51) connecting the first cooling section (53) and the hydrogen injection section (30), and can control hydrogen supply and cutoff.

[0048] In addition, the first flow section (50) may further include a first check valve section (56). The first check valve section (56) is formed in the first line section (51) connecting the first cooling section (53) and the first air pressure control valve section (55), and can prevent reverse flow of hydrogen.

[0049] Fig. 3 is a schematic diagram illustrating a second flow path according to a first embodiment of the present invention. Referring to Fig. 3, the second flow path (60) according to the first embodiment of the present invention may include a second line portion (61) and a second flow control portion (62).

[0050] The second line section (61) may have one end connected to the first line section (51) connecting the first flow detection section (54) and the first flow control section (52), and the other end connected to the first line section (51) connecting the first cooling section (53) and the hydrogen injection section (30). For example, the second line section (61) may induce hydrogen supplied from the hydrogen supply section (10) to bypass the first flow control section (52) and the first cooling section (53). The other end of the second line section (61) may be connected to the first line section (51) connecting the first check valve section (56) and the first air pressure control valve section (55).

[0051] The second flow control unit (62) is formed in the second line unit (61) and can control the flow rate of hydrogen. For example, the second flow control unit (62) can control the opening amount of the second line unit (61) to control the flow rate of hydrogen passing through the second line unit (61). Meanwhile, the first flow control unit (52) and the second flow control unit (62) can be driven to control the flow rate of hydrogen according to the value detected by the first flow detection unit (54).

[0052] The second flow path (60) according to the first embodiment of the present invention may further include a second check valve portion (63). The second check valve portion (63) is formed in the second line portion (61) connecting the second flow control portion (62) and the first line portion (51), and may prevent reverse flow of hydrogen passing through the first line portion (51). For example, the second check valve portion (63) may be a check valve that prevents hydrogen cooled in the first line portion (51) from flowing into the second line portion (61).

[0053] Fig. 4 is a schematic diagram of a second flow path according to a second embodiment of the present invention. Referring to Fig. 4, the second flow path (60) according to the second embodiment of the present invention may include a second bypass line portion (71) and a second bypass control portion (72).

[0054] The second bypass line (71) may have one end connected to the first line (51) connecting the first flow control unit (52) and the first cooling unit (53), and the other end connected to the first line (51) connecting the first cooling unit (53) and the hydrogen injection unit (30). For example, the second bypass line (71) may induce hydrogen passing through the first flow control unit (52) to bypass the first cooling unit (53). The other end of the second bypass line (71) may be connected to the first line (51) connecting the first check valve unit (56) and the first air pressure control valve unit (55).

[0055] The second bypass control unit (72) is formed in the second bypass line unit (71) and can control the flow rate of hydrogen. For example, the second bypass control unit (72) can control the flow rate of hydrogen passing through the second bypass line unit (71) by controlling the opening amount of the second bypass line unit (71). Meanwhile, the first flow rate control unit (52) and the second bypass control unit (72) can be driven according to the value detected by the first flow rate detection unit (54) to control the flow rate of hydrogen.

[0056] The second flow path (60) according to the second embodiment of the present invention may further include a second bypass valve (73). The second bypass valve (73) is formed in the second bypass line (71) connecting the second bypass control unit (72) and the first line (51), and may prevent reverse flow of hydrogen passing through the first line (51). For example, the second bypass valve (73) may be a check valve that prevents hydrogen cooled in the first line (51) from flowing into the second bypass line (71).

[0057] Meanwhile, depending on the state of the charging target (100), hydrogen may be supplied through at least one of the first flow path (50) and the second flow path (60). In this case, the state of the charging target (100) may refer to the temperature and pressure inside the storage tank of the vehicle that is the charging target (100).

[0058] That is, depending on the state of the charging target (100), the initial charging stage in which hydrogen is supplied through the first flow path (50), the middle charging stage in which hydrogen is supplied through the first flow path (50) and the second flow path (60), and the final charging stage in which hydrogen is supplied through the second flow path (60) can be sequentially performed.

[0059] Fig. 5 is a drawing schematically showing the hydrogen supply state through the first flow path in Fig. 3. Referring to Fig. 5, the hydrogen supply state through the first flow path (50) is described as follows.

[0060] In the charging start stage where the hydrogen injection unit (30) is connected to the vehicle, the pressure and temperature information of the vehicle are acquired through communication, and the pressure of the charging target (100) is verified through connection pulse application. If communication does not proceed normally, non-communication mode charging can proceed based on the pressure information of the charging target (100) acquired through connection pulse application. Generally, when the connection pulse is applied, cooled hydrogen is supplied as shown in FIG. 5 to reduce the pressure and temperature changes of the charging target (100) caused by the connection pulse.

[0061] In the initial stage of charging, when the first flow control unit (52) passes a set amount of hydrogen, the hydrogen passing through the first flow control unit (52) can be cooled in the first cooling unit (53) and then supplied to the charging target (100). Then, the second flow control unit (62) can close the second line unit (61). Meanwhile, depending on the charging target (100), hydrogen can be supplied to the charging target (100) at a preset temperature and amount.

[0062] Fig. 6 is a schematic diagram showing the hydrogen supply state through the first and second flow sections in Fig. 3. Referring to Fig. 6, the hydrogen supply state through the first flow section (50) and the second flow section (60) is described as follows.

[0063] In the intermediate charging stage, depending on the pressure and temperature of the charging target (100), hydrogen supply may be additionally provided through the second flow path (60) in addition to the first flow path (50). That is, when the first flow control unit (52) allows a set amount of hydrogen to pass through, the hydrogen passing through the first flow control unit (52) may be cooled in the first cooling unit (53) and then supplied to the charging target (100). In addition, when the second flow control unit (62) allows a set amount of hydrogen to pass through, the hydrogen passing through the second flow control unit (62) may be mixed with the hydrogen passing through the first cooling unit (53) and supplied to the charging target (100). This charging method may be applied in the intermediate stage when the charging start pressure of the charging target (100) is already high or when charging is terminated early before reaching the maximum charging pressure.

[0064] Fig. 7 is a diagram schematically illustrating the hydrogen supply state through the second flow path in Fig. 3. Referring to Fig. 7, the hydrogen supply state through the second flow path (60) is described as follows.

[0065] In the final stage of charging, charging through the first flow path (50) is blocked, and hydrogen can be supplied only through the second flow path (60). This prevents overcooling of the charging target (100) and improves cooling efficiency.

[0066] That is, hydrogen is supplied to the charging target (100) through the first flow section (50) and the second flow section (60), and depending on the temperature and pressure inside the storage tank of the charging target (100), hydrogen can be supplied only through the second flow section (60).

[0067] At this time, when the first flow control unit (52) blocks the movement of hydrogen to the first line unit (51) and the second flow control unit (62) allows the set amount of hydrogen to pass through, only the hydrogen that has passed through the second flow control unit (62) can be supplied to the charging target (100). In this charging method, even if hydrogen charging is performed only through the second line unit (61) in the final stage, the internal temperature change of the charging target (100) is not large.

[0068] Meanwhile, when the charging demand is small compared to the storage capacity of the charging target (100), the initial charging stage can be omitted and the middle or terminal charging method can be applied to reduce cooling loss. That is, depending on the state of the charging target (100), the initial charging stage can be omitted and the middle and terminal charging stages can be sequentially performed. In addition, depending on the state of the charging target (100), the initial and middle charging stages can be omitted and the terminal charging stage can be performed. For example, when the charging target (100) has a storage capacity of about 6 kg in a room temperature environment, it is possible to charge about 1 to 2 kg by applying only the terminal charging method depending on the internal remaining capacity when charging starts. Therefore, in a situation where the use of a cooler or precooler is impossible, emergency charging is possible by applying the terminal charging method.

[0069] Fig. 8 is a drawing schematically showing the hydrogen supply state through the first flow path in Fig. 4. Referring to Fig. 8, the hydrogen supply state through the first flow path (50) is described as follows.

[0070] In the charging start stage where the hydrogen injection unit (30) is connected to the vehicle, the pressure and temperature information of the vehicle is acquired through communication, and the pressure of the charging target (100) is verified through connection pulse application. If communication does not proceed normally, non-communication mode charging can proceed based on the pressure information of the charging target (100) acquired through connection pulse application. Generally, when the connection pulse is applied, cooled hydrogen is supplied as shown in FIG. 8 to reduce the pressure and temperature changes of the charging target (100) caused by the connection pulse.

[0071] In the initial stage of charging, when the first flow control unit (52) passes a set amount of hydrogen, the hydrogen passing through the first flow control unit (52) can be cooled in the first cooling unit (53) and then supplied to the charging target (100). In addition, the second bypass control unit (72) can close the second bypass line unit (71). Meanwhile, depending on the charging target (100), hydrogen can be supplied to the charging target (100) at a preset temperature and amount.

[0072] Fig. 9 is a schematic diagram showing the hydrogen supply state through the first and second flow sections in Fig. 4. Referring to Fig. 9, the hydrogen supply state through the first flow section (50) and the second flow section (60) is described as follows.

[0073] In the mid-charging stage, depending on the pressure and temperature of the charging target (100), hydrogen supply may be additionally provided through the second flow path (60) in addition to the first flow path (50). That is, when the first flow control unit (52) allows a set amount of hydrogen to pass through, the hydrogen passing through the first flow control unit (52) can be cooled in the first cooling unit (53) and then supplied to the charging target (100). In addition, when the second bypass line unit (71) is opened so that the second bypass control unit (72) allows a set amount of hydrogen to pass through, some of the hydrogen passing through the first flow control unit (52) passes through the second bypass control unit (72). The hydrogen passing through the second bypass control unit (72) can be mixed with the hydrogen passing through the first cooling unit (53) in an uncooled state and supplied to the charging target (100). This charging method can be applied in the mid-charge stage when the charging start pressure of the charging target (100) is already high or when charging is terminated early before reaching the maximum chargeable pressure.

[0074] Meanwhile, hydrogen of the first capacity set through the first flow control unit (52) passes, and hydrogen of the second capacity set through the second bypass control unit (72) passes. At this time, a third capacity, which is the first capacity minus the second capacity, can pass through the first cooling unit (53). This allows for precise control of the amount of hydrogen passing through the first cooling unit (53).

[0075] Fig. 10 is a schematic diagram illustrating the hydrogen supply state through the second flow path in Fig. 4. Referring to Fig. 10, the hydrogen supply state through the second flow path (60) is described as follows.

[0076] In the final stage of charging, charging through the first flow path (50) is blocked, and hydrogen can be supplied only through the second flow path (60). This prevents overcooling of the charging target (100) and improves cooling efficiency.

[0077] That is, hydrogen is supplied to the charging target (100) through the first flow section (50) and the second flow section (60), and depending on the temperature and pressure inside the storage tank of the charging target (100), hydrogen can be supplied only through the second flow section (60).

[0078] At this time, if the hydrogen passing amount of the first flow control unit (52) and the hydrogen passing amount of the second flow control unit (62) are the same, only the hydrogen passing through the second flow control unit (62) can be supplied to the charging target (100). In this charging method, even if hydrogen charging is performed only through the second line unit (61) in the final stage, the internal temperature change of the charging target (100) is not large.

[0079] Meanwhile, when the charging demand is small compared to the storage capacity of the charging target (100), the initial charging stage can be omitted and the middle or terminal charging method can be applied to reduce cooling loss. That is, depending on the state of the charging target (100), the initial charging stage can be omitted and the middle and terminal charging stages can be sequentially performed. In addition, depending on the state of the charging target (100), the initial and middle charging stages can be omitted and the terminal charging stage can be performed. For example, when the charging target (100) has a storage capacity of about 6 kg in a room temperature environment, it is possible to charge about 1 to 2 kg by applying only the terminal charging method depending on the internal remaining capacity when charging starts. Therefore, in a situation where the use of a cooler or precooler is impossible, emergency charging is possible by applying the terminal charging method.

[0080] A hydrogen charging device (1) according to one embodiment of the present invention can selectively supply hydrogen through a first flow path (50) that guides cooled hydrogen and a second flow path (60) that guides uncooled hydrogen, so that optimized hydrogen charging is possible according to the pressure and temperature of a charging target (100), and cooling efficiency can be improved.

[0081] According to one embodiment of the present invention, a hydrogen charging device (1) can supply cooled hydrogen to a charging target (100) through a first flow path (50) at the initial stage of charging.

[0082] According to one embodiment of the present invention, a hydrogen charging device (1) can supply a mixture of cooled hydrogen through a first flow path (50) and uncooled hydrogen through a second flow path (60) to a charging target (100) during the charging period.

[0083] According to one embodiment of the present invention, a hydrogen charging device (1) can supply uncooled hydrogen to a charging target (100) through a second flow path (60) in the final charging stage.

[0084] While the present invention has been described with reference to the embodiments illustrated in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent embodiments are possible. Accordingly, the true technical protection scope of the present invention should be defined by the following claims.

Claims

1. Hydrogen supply unit that supplies hydrogen; A hydrogen guide unit connected to the hydrogen supply unit and guiding hydrogen; and It includes a hydrogen injection unit connected to the hydrogen guide unit and injecting hydrogen that has passed through the hydrogen guide unit into a charging target; The above hydrogen guide section A first flow path connecting the hydrogen supply unit and the hydrogen injection unit and guiding cooled hydrogen; and A hydrogen charging device characterized by including a second flow path connecting the hydrogen supply unit and the hydrogen injection unit and guiding uncooled hydrogen.

2. In paragraph 1, the first euro portion A first line section connecting the hydrogen supply section and the hydrogen injection section and guiding hydrogen; A first flow control unit formed in the first line section and controlling the flow rate of hydrogen; and A hydrogen charging device characterized by including a first cooling unit formed in the first line section and cooling hydrogen.

3. In the second paragraph, the first euro portion A hydrogen charging device characterized by further comprising a first flow rate detection unit formed in the first line section and detecting the flow rate of hydrogen before it moves to the first flow rate control unit.

4. In the third paragraph, the second euro portion A second line part having one end connected to the first line part connecting between the first flow detection part and the first flow control part, and the other end connected to the first line part connecting between the first cooling part and the hydrogen injection part; and A hydrogen charging device characterized by including a second flow control unit formed in the second line section and controlling the flow rate of hydrogen.

5. In paragraph 4, the second euro portion A hydrogen charging device characterized by further comprising a second check valve portion formed in the second line portion connecting the second flow control portion and the first line portion, and preventing reverse flow of hydrogen passing through the first line portion.

6. In the second paragraph, the second euro portion A second bypass line part having one end connected to the first line part connecting between the first flow control part and the first cooling part, and the other end connected to the first line part connecting between the first cooling part and the hydrogen injection part; and A hydrogen charging device characterized by including a second bypass control unit formed in the second bypass line section and controlling the flow rate of hydrogen.

7. In paragraph 6, the second euro portion A hydrogen charging device characterized by further comprising a second bypass valve portion formed in the second bypass line portion connecting the second bypass control portion and the first line portion, and preventing reverse flow of hydrogen passing through the first line portion.

8. In paragraph 1, A hydrogen charging device characterized in that hydrogen is supplied through at least one of the first flow section and the second flow section depending on the state of the charging target.

9. In paragraph 8, A hydrogen charging device characterized in that the initial charging stage in which hydrogen is supplied through the first flow path according to the state of the charging target is omitted, and the intermediate charging stage in which hydrogen is supplied through the first flow path and the second flow path, and the final charging stage in which hydrogen is supplied through the second flow path are sequentially performed.

10. In paragraph 8, A hydrogen charging device characterized in that the initial charging stage in which hydrogen is supplied through the first flow path according to the state of the charging target is omitted, and the intermediate charging stage in which hydrogen is supplied through the first flow path and the second flow path, and the final charging stage in which hydrogen is supplied through the second flow path are sequentially performed.

11. In paragraph 8, A hydrogen charging device characterized in that the charging initial stage in which hydrogen is supplied through the first flow section according to the state of the charging target and the charging mid-stage in which hydrogen is supplied through the first flow section and the second flow section are omitted and the charging terminal stage in which hydrogen is supplied through the second flow section is performed.

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