Protective device and hydrogen energy system

Abstract

The utility model relates to the technical field of hydrogen energy, and discloses a protection device and a hydrogen energy system.The protection device is used for protecting a hydrogen bottle and comprises a frame, a bandage and a protection mechanism; the binding band is connected to the frame and is used for binding the hydrogen bottle; the protection mechanism comprises an energy absorption piece and a connecting piece, the energy absorption piece is connected to the frame, one end of the connecting piece is connected to the energy absorption piece, and the end, away from the energy absorption piece, of the connecting piece is used for being connected to the hydrogen bottle; according to the protection device provided by the utility model, a two-stage protection effect can be achieved on the hydrogen cylinder through the bandage and the protection mechanism, and the safety of a hydrogen energy system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen energy, in particular to a protective device and a hydrogen energy system. Background Art

[0002] Hydrogen vehicles use hydrogen energy systems such as hydrogen fuel cell systems or hydrogen internal combustion engines as powertrain modules, which can achieve zero carbon emissions during driving and are an important development direction in the future transportation field.

[0003] Most hydrogen energy systems of existing hydrogen vehicles rely solely on straps to secure hydrogen bottles to the frame, lacking collision protection for the hydrogen bottles and resulting in poor safety. Utility Model Content

[0004] Aiming to solve at least one of the technical problems existing in the prior art, the present invention aims to provide a protective device and a hydrogen energy system having the protective device, wherein the protective device improves the safety of the hydrogen energy system.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a protective device for protecting a hydrogen bottle, comprising a frame, a strap and a protective mechanism; the strap is connected to the frame and is used to bind the hydrogen bottle; the protective mechanism comprises an energy absorbing member and a connecting member, the energy absorbing member is connected to the frame, one end of the connecting member is connected to the energy absorbing member, and the end of the connecting member away from the energy absorbing member is used to be connected to the hydrogen bottle.

[0006] In some embodiments, the protective device has a first direction, which is parallel to the axial direction of the hydrogen bottle; the energy absorbing member includes a protective beam, a first pressure plate, a partition and a first energy absorbing body, the protective beam is connected to the frame, the protective beam has a mounting groove running through the first direction, the first energy absorbing body is arranged in the mounting groove, the first pressure plate is arranged in the mounting groove and can move along the first direction, the partition is arranged in the mounting groove and is located on one side of the first pressure plate, the first energy absorbing body is arranged between the first pressure plate and the partition, and the two ends of the first energy absorbing body are respectively connected to the first pressure plate and the partition; the connecting member includes a first connecting rod, one end of the first connecting rod is used to be connected to the hydrogen bottle, the first connecting rod extends into the mounting groove away from the end of the hydrogen bottle and is connected to the side of the first pressure plate facing away from the first energy absorbing body.

[0007] In some embodiments, the energy absorbing member further includes a second pressure plate and a second energy absorbing body, the second pressure plate being arranged in the mounting groove and capable of moving along the first direction, the second pressure plate being located on the side of the partition away from the first pressure plate, the second energy absorbing body being arranged between the partition and the second pressure plate, and the two ends of the second energy absorbing body being respectively connected to the partition and the second pressure plate; the connecting member further includes a second connecting rod, one end of the second connecting rod being connected to the hydrogen bottle, and the end of the second connecting rod away from the hydrogen bottle extending into the mounting groove and connected to the side of the second pressure plate away from the second energy absorbing body.

[0008] In some embodiments, the material of the first energy absorber is a negative Poisson's ratio material, and the material of the second energy absorber is a second negative Poisson's ratio material.

[0009] In some embodiments, the hydrogen bottle has a bottle body, a connecting tube and a bottle valve, and the two ends of the connecting tube are respectively connected to the bottle body and the bottle valve; the protective mechanism also includes a protective part, and the protective part includes a protective base, a protective cover and multiple protective brackets, and the two ends of the protective bracket are respectively connected to the protective base and the protective cover, and the protective base has a first through hole for the connecting tube to pass through, and multiple protective brackets are distributed around the first through hole. An accommodating space is formed between the protective base, the protective cover and the multiple protective brackets, and the accommodating space is used to accommodate the bottle valve.

[0010] In some embodiments, the hydrogen bottle further includes a connector connected to the bottle valve; and the protective cover has a second through hole for the connector to pass through.

[0011] In some embodiments, the protective base includes a first protective portion and a second protective portion, the second protective portion is detachably connected to the first protective portion, and the first through hole is formed between the second protective portion and the first protective portion.

[0012] In some embodiments, the protective base has a first guide slot extending therethrough, and the protective cover has a second guide slot extending therethrough.

[0013] In some embodiments, the protective device also includes a buffer pad; the frame is provided with a receiving groove for accommodating the hydrogen bottle, the groove wall shape of the receiving groove matches the outer wall shape of the hydrogen bottle, and the buffer pad is connected to the groove wall of the receiving groove.

[0014] The present utility model also provides a hydrogen energy system, which includes the protective device described in any one of the above items, and also includes a hydrogen bottle, which is fixed to the frame by the strap, and the two ends of the connecting piece are respectively connected to the energy absorbing piece and the hydrogen bottle.

[0015] Compared with the prior art, the protective device of the embodiment of the present invention has the following beneficial effects: the hydrogen bottle is tied to the frame by a strap. When the hydrogen bottle is subjected to an ordinary collision or impact, the collision impact energy is small and does not exceed the fixed failure limit of the strap. The strap ensures that the hydrogen bottle is fixed to the frame, thereby achieving a first-level protection effect; when the hydrogen bottle is subjected to an excessive collision, the collision impact energy is large and exceeds the fixed failure limit of the strap. The collision impact energy of the hydrogen bottle is transmitted to the energy-absorbing part through the connecting part, and the energy-absorbing part absorbs the collision impact energy to achieve the purpose of buffering protection, thereby achieving a second-level protection effect; therefore, the protective device provided by the present invention can achieve a two-level protection effect on the hydrogen bottle through the strap and the protective mechanism, thereby improving the safety of the hydrogen energy system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a hydrogen energy system provided by an embodiment of the present utility model;

[0017] Figure 2 This is a front view of a hydrogen energy system provided by an embodiment of the present utility model;

[0018] Figure 3 This is a side view of a hydrogen energy system provided by an embodiment of the present utility model;

[0019] Figure 4 This is a schematic structural diagram of a hydrogen bottle provided by an embodiment of the present utility model;

[0020] Figure 5 This is a schematic structural diagram of a protective device provided by an embodiment of the present utility model;

[0021] Figure 6 It is a structural diagram of the framework provided by an embodiment of the present utility model;

[0022] Figure 7 It is a structural diagram of the protection mechanism provided by an embodiment of the utility model;

[0023] Figure 8 is a cross-sectional view of an energy absorbing member provided in an embodiment of the present utility model;

[0024] Figure 9 This is an exploded view of the energy absorbing member provided in an embodiment of the present utility model;

[0025] Figure 10 This is a schematic structural diagram of a protective element provided by an embodiment of the present utility model;

[0026] Figure 11 It is a structural schematic diagram of the protective base provided by an embodiment of the utility model.

[0027] In the figure, 100, protective device;

[0028] 1. Frame; 11. Accommodating groove;

[0029] 2. Straps;

[0030] 3. Protective mechanism; 31. Energy-absorbing member; 32. Connecting member; 33. Protective member; 311. Protective beam; 312. First pressure plate; 313. Partition; 314. First energy-absorbing body; 315. Second pressure plate; 316. Second energy-absorbing body; 321. First connecting rod; 322. Second connecting rod; 331. Protective base; 332. Protective cover; 333. Protective bracket; 334. Accommodating space; 3111. Mounting slot; 3311. First protective portion; 3312. Second protective portion; 3313. First through hole; 3314. First guide slot; 3321. Second through hole; 3322. Second guide slot;

[0031] 4. Cushion;

[0032] 200, hydrogen bottle; 201, bottle body; 202, connecting pipe; 203, bottle valve; 204, connector;

[0033] Z, first direction. DETAILED DESCRIPTION

[0034] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0037] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0038] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0039] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0040] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0041] See Figures 1-4 The present invention provides a hydrogen energy system, comprising a protective device 100 according to any one of the following, and also comprising a hydrogen bottle 200. The protective device 100 comprises a frame 1, a strap 2, and a protective mechanism 3. The protective mechanism 3 comprises an energy-absorbing member 31 and a connector 32. The hydrogen bottle 200 is secured to the frame 1 by the strap 2, and the ends of the connector 32 are respectively connected to the energy-absorbing member 31 and the hydrogen bottle 200.

[0042] The hydrogen bottle 200 includes a bottle body 201 , a connecting tube 202 , a bottle valve 203 and a connector 204 . The two ends of the connecting tube 202 are respectively connected to the bottle body 201 and the bottle valve 203 , and the connector 204 is connected to the bottle valve 203 .

[0043] The protection device 100 has a first direction Z, which is parallel to the axial direction of the hydrogen bottle 200 .

[0044] like Figure 5-11 As shown, a preferred embodiment of the present invention provides a protective device 100 for protecting a hydrogen bottle 200 , comprising a frame 1 , a strap 2 and a protective mechanism 3 .

[0045] The strap 2 is connected to the frame 1 and is used to bind the hydrogen bottle 200. The protective mechanism 3 includes an energy absorbing member 31 and a connecting member 32. The energy absorbing member 31 is connected to the frame 1, one end of the connecting member 32 is connected to the energy absorbing member 31, and the end of the connecting member 32 away from the energy absorbing member 31 is used to connect to the hydrogen bottle 200.

[0046] Based on this technical solution, the hydrogen bottle 200 is tied to the frame 1 by the strap 2. When the hydrogen bottle 200 is subjected to ordinary collision or impact, the collision impact energy is small and does not exceed the fixed failure limit of the strap 2. The strap 2 ensures that the hydrogen bottle 200 is fixed on the frame 1, thereby achieving a first-level protection effect; when the hydrogen bottle 200 is subjected to an excessive collision, the collision impact energy is large and exceeds the fixed failure limit of the strap 2. The collision impact energy of the hydrogen bottle 200 is transmitted to the energy absorbing member 31 through the connecting member 32. The energy absorbing member 31 absorbs the collision impact energy to achieve the purpose of buffering protection, thereby achieving a second-level protection effect; therefore, the protective device 100 provided by the utility model can achieve a two-level protection effect on the hydrogen bottle 200 through the strap 2 and the protective mechanism 3, thereby improving the safety of the hydrogen energy system.

[0047] In this embodiment, there are two straps 2 .

[0048] In some other embodiments, the number of straps 2 may be one, three, four, or any other number, which is not limited here.

[0049] See Figure 5-Figure 6 ,

[0050] The frame 1 is provided with an accommodating groove 11 for accommodating the hydrogen bottle 200 , and the shape of the groove wall of the accommodating groove 11 matches the shape of the outer wall of the hydrogen bottle 200 .

[0051] The protective device 100 also includes a cushion 4, which is disposed between the wall of the receiving groove 11 and the outer wall of the hydrogen bottle 200. Thus, when the hydrogen bottle 200 is subjected to a collision or impact perpendicular to the axial direction, the cushion 4 can provide a buffering and protective effect on the hydrogen bottle 200, thereby improving the protective performance of the hydrogen bottle 200.

[0052] See Figure 5 ,and Figure 7-Figure 9The energy absorbing member 31 includes a protective beam 311, a first pressure plate 312, a partition 313 and a first energy absorbing body 314. The protective beam 311 is connected to the frame 1. The protective beam 311 has a mounting groove 3111 running through along the first direction Z. The first energy absorbing body 314 is arranged in the mounting groove 3111. The first pressure plate 312 is arranged in the mounting groove 3111 and can move along the mounting groove 3111. The partition 313 is arranged in the mounting groove 3111 and is located at the first pressure plate. On one side of 312, the first energy absorbing body 314 is arranged between the first pressure plate 312 and the partition 313, and the two ends of the first energy absorbing body 314 are respectively connected to the first pressure plate 312 and the partition 313; the connecting member 32 includes a first connecting rod 321, one end of the first connecting rod 321 is connected to the hydrogen bottle 200, and the end of the first connecting rod 321 away from the hydrogen bottle 200 extends into the mounting groove 3111 and is connected to the side of the first pressure plate 312 away from the first energy absorbing body 314.

[0053] In this way, when the hydrogen bottle 200 is subjected to an ordinary axial collision or impact, the collision impact energy is small and does not exceed the fixed failure limit of the strap 2, and the strap 2 ensures that the hydrogen bottle 200 is fixed on the frame 1, thereby achieving a first-level protection effect; when the hydrogen bottle 200 is subjected to an axial excessive collision, the collision impact energy is large and exceeds the fixed failure limit of the strap 2, the collision impact energy of the hydrogen bottle 200 is transmitted to the first pressure plate 312 through the first connecting rod 321, and the first pressure plate 312 compresses the first energy absorbing body 314, and the first energy absorbing body 314 undergoes plastic deformation to absorb the collision impact energy to achieve the purpose of buffering protection, thereby achieving a second-level protection effect.

[0054] The space required for the arrangement of the protective beam 311 and the first connecting rod 321 is small, so that the connecting member 32 and the energy absorbing member 31 can be designed based on the size of the existing hydrogen energy system frame 1 and the actual arrangement size of the hydrogen bottle 200, thereby making it possible for the protective mechanism 3 to be directly matched and installed without changing the original arrangement of the hydrogen energy system, thus having a wider range of applications and greater practicality.

[0055] A component capable of absorbing collision impact energy is formed by using a protective beam 311, a first pressure plate 312, a partition 313 and a first energy-absorbing body 314. The material and size of the first energy-absorbing body 314 can be performance-selected and designed based on actual needs, so that the buffer compression stroke of the first energy-absorbing body 314 can be better designed according to the actual needs and actual space size of the hydrogen energy system, with a wider range of applicability and greater practicality.

[0056] The energy absorbing member 31 also includes a second pressure plate 315 and a second energy absorbing body 316. The second pressure plate 315 is disposed within the mounting groove 3111 and is movable along the mounting groove 3111. The second pressure plate 315 is located on the side of the partition 313 facing away from the first pressure plate 312. The second energy absorbing body 316 is disposed between the partition 313 and the second pressure plate 315, with the two ends of the second energy absorbing body 316 respectively connected to the partition 313 and the second pressure plate 315. The connecting member 32 also includes a second connecting rod 322. One end of the second connecting rod 322 is connected to the hydrogen bottle 200. The end of the second connecting rod 322 away from the hydrogen bottle 200 extends into the mounting groove 3111 and is connected to the side of the second pressure plate 315 facing away from the second energy absorbing body 316. In this way, when the hydrogen bottle 200 is impacted, the energy absorbing member 31 can absorb the impact energy to a greater extent, further improving the protective performance of the protective mechanism 3 for the hydrogen bottle 200.

[0057] In this embodiment, the partition 313 is fixedly connected to the inner wall of the mounting groove 3111, and the first energy absorbing body 314 and the second energy absorbing body 316 are separated by the partition 313, so that the first energy absorbing body 314 and the second energy absorbing body 316 are independent of each other and do not affect each other, that is, when the first energy absorbing body 314 is compressed and deformed, it will not cause the second energy absorbing body 316 to be compressed and deformed, and when the second energy absorbing body 316 is compressed and deformed, it will not cause the first energy absorbing body 314 to be compressed and deformed.

[0058] In this embodiment, the first energy absorber 314 is made of a negative Poisson's ratio material, and the second energy absorber 316 is made of a second negative Poisson's ratio material. When subjected to external forces, the "compression-contraction" deformation characteristics of negative Poisson's ratio materials ensure compression deformation of the flow field, effectively deforming and absorbing energy, reducing the transmission of impact forces and providing excellent energy absorption capabilities.

[0059] In this embodiment, each protective mechanism 3 includes two energy-absorbing parts 31 and two connecting parts 32. The two energy-absorbing parts 31 are respectively arranged on both sides of the hydrogen bottle 200, and the two energy-absorbing parts 31 are respectively connected to the hydrogen bottle 200 through two connecting parts 32, that is, each hydrogen bottle 200 is equipped with two energy-absorbing parts 31 for buffering protection.

[0060] In some other embodiments, each hydrogen bottle 200 may also be configured with one, three, four, or any other number of energy-absorbing members 31 for buffering protection, which is not limited here.

[0061] See Figure 5 ,and Figure 10-11The protection mechanism 3 also includes a protection part 33, which includes a protection base 331, a protection cover 332 and multiple protection brackets 333. The two ends of the protection bracket 333 are respectively connected to the protection base 331 and the protection cover 332. The protection base 331 has a first through hole 3313 for the connecting pipe 202 to pass through. Multiple protection brackets 333 are distributed around the first through hole 3313. An accommodating space 334 is formed between the protection base 331, the protection cover 332 and the multiple protection brackets 333. The accommodating space 334 is used to accommodate the bottle valve 203. In this way, when the bottle valve 203 passes through the first through hole 3313, the connecting pipe 202 in the first through hole 3313 can be protected by the side wall of the first through hole 3313, and the bottle valve 203 located in the accommodating space 334 can be protected by the protective bracket 333 distributed around the first through hole 3313, thereby effectively reducing the damage to the bottle valve 203 when the hydrogen bottle 200 is subjected to a collision impact, and improving the safety factor of the vehicle-mounted hydrogen bottle 200 system.

[0062] In this embodiment, the connecting member 32 is indirectly connected to the hydrogen bottle 200 via the protective member 33. When the hydrogen bottle 200 is subjected to an axial over-limit collision, the over-limit collision first impacts the protective cover 332 of the protective member 33, causing the protective member 33 to cause the hydrogen bottle 200 to undergo axial displacement. The protective member 33 then transfers the collision impact energy to the first pressure plate 312 via the first connecting rod 321. The first pressure plate 312 compresses the first energy absorber 314, causing it to plastically deform and absorb the collision impact energy, thereby achieving the purpose of buffering protection and providing a secondary protective effect.

[0063] In some other embodiments, the connector 32 may be connected to the hydrogen bottle 200 indirectly through a snap connection, a strap 2 connection, or the connector 32 may be directly connected to the hydrogen bottle 200, which is not limited here.

[0064] The protective cover 332 has a second through hole 3321 for the connector 204 to pass through. The second through hole 3321 is used to allow the connector 204 to be exposed outside the protective member 33, which can adapt to the diverse designs of the connectors 204 of various bottle valves 203, making the protective member 33 more applicable and more practical.

[0065] The protective base 331 includes a first protective portion 3311 and a second protective portion 3312. The second protective portion 3312 is detachably connected to the first protective portion 3311. A first through hole 3313 is formed between the second protective portion 3312 and the first protective portion 3311. This facilitates quick and convenient assembly of the protective member 33 onto the bottle valve 203 of the hydrogen bottle 200.

[0066] In this embodiment, the second protection portion 3312 is detachably connected to the first protection portion 3311 by means of bolts.

[0067] In some other embodiments, the second protective portion 3312 can also be detachably connected to the first protective portion 3311 by any connection method such as screw connection, clamp connection, flange connection, clamp connection, etc., which is not limited here.

[0068] The protective base 331 has a first guide slot 3314 extending therethrough, and the protective cover 332 has a second guide slot 3322 extending therethrough. The first guide slot 3314 and the second guide slot 3322 allow the piping on the hydrogen bottle 200 to pass through and guide the piping on the bottle valve 203, thereby allowing the protective member 33 to match the piping arrangement on the bottle valve 203, thereby providing good protection for the bottle valve 203 and preventing interference between the protective member 33 and the piping on the bottle valve 203.

[0069] In this embodiment, both the first protection portion 3311 and the second protection portion 3312 have a first guiding groove 3314 .

[0070] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A protective device for protecting a hydrogen bottle (200), characterized in that: include: Framework (1); a binding strap (2), the binding strap (2) being connected to the frame (1) and used for binding the hydrogen bottle (200); A protective mechanism (3), the protective mechanism (3) comprising an energy absorbing member (31) and a connecting member (32), the energy absorbing member (31) being connected to the frame (1), one end of the connecting member (32) being connected to the energy absorbing member (31), and the end of the connecting member (32) away from the energy absorbing member (31) being used for connecting to the hydrogen bottle (200).

2. The protective device according to claim 1, characterized in that having a first direction (Z), wherein the first direction (Z) is parallel to the axial direction of the hydrogen bottle (200); The energy absorbing member (31) comprises a protective beam (311), a first pressure plate (312), a partition (313) and a first energy absorbing body (314); the protective beam (311) is connected to the frame (1); the protective beam (311) has a mounting groove (3111) extending along the first direction (Z); the first energy absorbing body (314) is arranged in the mounting groove (3111); the first pressure plate (312) is arranged in the mounting groove (3111) and is movable along the first direction (Z); the partition (313) is arranged in the mounting groove (3111) and is located on one side of the first pressure plate (312); the first energy absorbing body (314) is arranged between the first pressure plate (312) and the partition (313); and two ends of the first energy absorbing body (314) are respectively connected to the first pressure plate (312) and the partition (313); The connecting member (32) includes a first connecting rod (321), one end of which is used to be connected to the hydrogen bottle (200), and the end of the first connecting rod (321) away from the hydrogen bottle (200) extends into the mounting groove (3111) and is connected to the side of the first pressure plate (312) away from the first energy absorbing body (314).

3. The protective device according to claim 2, characterized in that: The energy absorbing member (31) further comprises a second pressing plate (315) and a second energy absorbing body (316); the second pressing plate (315) is arranged in the installation slot (3111) and is movable along the first direction (Z); the second pressing plate (315) is located on a side of the partition (313) away from the first pressing plate (312); the second energy absorbing body (316) is arranged between the partition (313) and the second pressing plate (315); and two ends of the second energy absorbing body (316) are respectively connected to the partition (313) and the second pressing plate (315); The connecting member (32) further includes a second connecting rod (322), one end of which is connected to the hydrogen bottle (200), and the end of the second connecting rod (322) away from the hydrogen bottle (200) extends into the mounting groove (3111) and is connected to the side of the second pressure plate (315) facing away from the second energy absorbing body (316).

4. The protective device according to claim 3, characterized in that: The material of the first energy absorbing body (314) is a negative Poisson's ratio material, and the material of the second energy absorbing body (316) is a second negative Poisson's ratio material.

5. The protective device according to claim 1, characterized in that: The hydrogen bottle (200) comprises a bottle body (201), a connecting pipe (202) and a bottle valve (203), wherein two ends of the connecting pipe (202) are respectively connected to the bottle body (201) and the bottle valve (203); The protection mechanism (3) further includes a protection member (33), the protection member (33) including a protection base (331), a protection cover (332) and a plurality of protection brackets (333), the two ends of the protection bracket (333) being respectively connected to the protection base (331) and the protection cover (332), the protection base (331) having a first through hole (3313) for the connecting pipe (202) to pass through, the plurality of protection brackets (333) being distributed around the first through hole (3313), and an accommodating space (334) being formed between the protection base (331), the protection cover (332) and the plurality of protection brackets (333), the accommodating space (334) being used to accommodate the bottle valve (203).

6. The protective device according to claim 5, characterized in that: The hydrogen bottle (200) further includes a connector (204), and the connector (204) is connected to the bottle valve (203); The protective cover (332) has a second through hole (3321) for the connector (204) to pass through.

7. The protective device according to claim 5, characterized in that: The protective base (331) includes a first protective portion (3311) and a second protective portion (3312), wherein the second protective portion (3312) is detachably connected to the first protective portion (3311), and the first through hole (3313) is formed between the second protective portion (3312) and the first protective portion (3311).

8. The protective device according to claim 5, characterized in that The protective base (331) has a first guide slot (3314) extending therethrough, and the protective cover (332) has a second guide slot (3322) extending therethrough.

9. The protective device according to any one of claims 1 to 8, characterized in that: Also includes a cushion (4); The frame (1) is provided with a receiving groove (11) for receiving the hydrogen bottle (200), and the buffer pad (4) is connected to the groove wall of the receiving groove (11).

10. A hydrogen energy system, characterized in that: The protective device comprises a protective device according to any one of claims 1 to 9, and further comprises a hydrogen bottle (200), wherein the hydrogen bottle (200) is fixed to the frame (1) by being tied with the strap (2), and the two ends of the connecting member (32) are respectively connected to the energy absorbing member (31) and the hydrogen bottle (200).

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