Box body structure of hydrogen fuel cell

Abstract

The invention relates to the technical field of fuel cells, in particular to a hydrogen fuel cell box structure which comprises a box used for mounting a hydrogen fuel cell body and internally provided with a buffer device. The buffer device comprises at least one pair of buffer assemblies and a pair of connecting plates which are arranged on the hydrogen fuel cell body and are connected with the buffer assemblies; the same pair of buffer assemblies are respectively arranged on the mutually parallel side surfaces of the hydrogen fuel cell body, each buffer assembly is at least provided with a pair of pressing blocks and a pre-tightening mechanism, a conical groove is formed at the mutually close part of the two pressing blocks, and a connecting ball head is arranged on the connecting plate; the pressing block capable of forming the conical groove is arranged in the box body, and the conical groove is matched with the connecting ball head, so that when the hydrogen fuel cell body moves in the transverse direction, the longitudinal direction or the inclined direction, the movement can be converted into the displacement of the pressing block in the pre-tightening force direction through the contact of the ball head and the conical groove, and the omnidirectional buffering is realized; and the problem of limitation of a unidirectional buffer structure is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to a hydrogen fuel cell box structure. Background Art

[0002] A fuel cell is a power generation device that converts the chemical energy of a fuel directly into electrical energy. Its basic composition is similar to that of a conventional battery, consisting of a positive electrode (oxidant electrode), a negative electrode (fuel electrode) and an electrolyte. During operation, the fuel and oxidant are supplied externally to react electrochemically on the electrode surface, thereby continuously outputting electrical energy. Fuel cells are often integrated into automotive power systems as clean energy drive devices.

[0003] In the prior art, fuel cell stacks are usually encapsulated in fixed box structures to ensure their stable operation. However, in actual applications, especially in vehicle environments, it is inevitable that the vehicle will generate severe vibrations or shocks in the vertical direction (such as bumpy roads) and horizontal directions (such as sudden acceleration, braking or steering) when driving. Traditional fixing mechanisms mostly use rigid installations or simple buffer structures, which are difficult to effectively absorb multi-directional impact energy, causing fuel cell stacks to be prone to structural loosening, connector fatigue, and even core component damage in long-term vibration environments, affecting their service life and safety. In addition, existing buffer structures often only protect against vibrations in a single direction, lack the ability to coordinate buffering for multi-dimensional shaking under complex working conditions, further limiting the reliability of fuel cells in dynamic environments.

[0004] Patent document announcement number CN114335657B discloses a fuel cell safety protection device, including a base, a fixed bottom plate is arranged on the top of the base, a battery assembly is detachably connected to the top outer wall of the fixed bottom plate, a plurality of transverse buffer mechanisms are connected between the top of the base and the bottom of the fixed bottom plate, a vertical buffer mechanism corresponding to the position of the transverse buffer mechanism is arranged on the periphery of the top of the base, the transverse buffer mechanism is connected to the bottom of the vertical buffer mechanism, and the fixed bottom plate is connected to the top of the vertical buffer mechanism.

[0005] The device converts the sway force generated in the horizontal direction into the sway force generated in the vertical direction through the lateral buffer mechanism and the longitudinal buffer mechanism, and improves the overall buffering effect by vertically steering the force. However, when the battery assembly is subjected to an oblique impact (such as a sharp turn + bumps in the vehicle), the lateral and vertical buffers cannot work together, which may lead to buffer failure. Summary of the invention

[0006] In view of the problems existing in the prior art, a hydrogen fuel cell box structure is provided. By arranging a pressing block capable of forming a tapered groove in the box body, and through the cooperation design of the tapered groove and the connecting ball head, when the hydrogen fuel cell body moves horizontally, longitudinally or obliquely, the movement can be converted into the displacement in the direction of the pre-tightening force received by the pressing block through the contact between the ball head and the tapered groove, realizing all-direction buffering and solving the limitation problem of the single-direction buffering structure.

[0007] To solve the problems of the prior art, the present invention provides a hydrogen fuel cell box structure, including a box body for installing a hydrogen fuel cell body, and a buffer device is built in for buffering the movement of the hydrogen fuel cell body relative to the box body; the buffer device includes at least a pair of buffer components and a pair of connecting plates mounted on the hydrogen fuel cell body and connected to the buffer components; the same pair of buffer components are arranged on the mutually parallel sides of the hydrogen fuel cell body, and each buffer component has at least a pair of pressing blocks and a pre-tightening mechanism for driving the pair of pressing blocks to approach each other. A tapered groove is formed at the place where the two pressing blocks approach each other, and a connecting ball head matching with the tapered groove is arranged on the connecting plate; the direction of the approaching movement of the pressing block is parallel to the side of the hydrogen fuel cell body facing it; when the hydrogen fuel cell body moves horizontally, longitudinally or obliquely relative to the box body, the connecting ball head converts the movement of the hydrogen fuel cell body into the displacement of the pressing block along the direction of the pre-tightening force applied by the pre-tightening mechanism to the pressing block through the tapered groove, thereby realizing the buffering of the movement of the hydrogen fuel cell body.

[0008] Preferably, the buffer component further includes a guide rail for installing a pair of pressing blocks, and the pre-tightening mechanism approaches the two pressing blocks along the length direction of the guide rail.

[0009] Preferably, each pressing block in a pair of pressing blocks is provided with a special-shaped groove, and the two special-shaped grooves are spliced to form a tapered groove.

[0010] Preferably, the pre-tightening mechanism includes a positioning plate group correspondingly connected to each pair of buffer components. On the relative sides of the positioning plate group along the approaching direction of the pressing block, a force transmission arm group connected to the corresponding pressing block is respectively arranged, and an elastic buffer element is arranged between the force transmission arm group and the positioning plate group.

[0011] Preferably, the positioning plate group includes a pair of adjusting plates, the distance between the pair of adjusting plates is adjustably arranged in the box body, the elastic buffer element is arranged between the force transmission arm group and the adjusting plate, and the pre-tightening mechanism further includes a bidirectional lead screw rotatably arranged in the box body. The bidirectional lead screw respectively penetrates through the two adjusting plates and is threadedly connected to them.

[0012] Preferably, the force transmission arm group includes a transmission block movably disposed on one side of the positioning plate group along the approaching direction of the pressing block. An elastic buffer element is disposed between the positioning plate group and the transmission block. A transmission connecting rod is disposed between the transmission block and its corresponding pressing block. A pivot shaft connected to the box body is disposed on the transmission connecting rod, and two ends of the transmission connecting rod are respectively and floatingly connected to the transmission block and the pressing block.

[0013] Preferably, the rod length from the connecting end of the transmission connecting rod to the pressing block to the pivot shaft is less than the rod length from the connecting end of the transmission connecting rod to the transmission block to the pivot shaft.

[0014] Preferably, the pre-tightening mechanism further includes a positioning block disposed on the back side of a pair of pressing blocks, and a spring is disposed between the positioning block and its adjacent pressing block.

[0015] Preferably, the buffer device has three pairs of buffer components respectively disposed corresponding to three pairs of mutually parallel side surfaces of the hydrogen fuel cell body.

[0016] Preferably, each buffer component has a pair of pressing blocks, and a connecting ball head cooperating with the pair of pressing blocks is disposed at the center position of the side surface of the hydrogen fuel cell body.

[0017] The beneficial effects of the present application compared with the prior art are as follows:

[0018] In the present application, at least one pair of buffer components are disposed in the box body, and each buffer component includes a pair of pressing blocks capable of approaching each other to form a tapered groove. By the cooperation of the connecting ball head on the connecting plate connected to the hydrogen fuel cell body with the tapered groove, when the hydrogen fuel cell body moves horizontally, longitudinally or obliquely, the movement can be converted into the radial displacement of the pressing block through the contact between the ball head and the tapered groove, realizing all-direction buffering and avoiding the limitation of the single-direction buffering structure.

[0019] Wherein the pre-tightening mechanism enables the pressing block to always maintain the clamping force on the connecting ball head, ensuring that the fuel cell body will not freely shake when being impacted, reducing the transmission of vibration to the box body, and improving the stability of the overall structure.

[0020] Moreover, the buffer components are symmetrically arranged on the parallel side surfaces of the fuel cell body, occupying a small space, not affecting the layout of other components in the box body, and being convenient for installation and disassembly.

[0021] Meanwhile, when the external force disappears, the pre-tightening mechanism pushes the pressing block to automatically return to its original position, enabling the connecting ball head to restore its initial position without additional adjustment, ensuring the sustainable use of the buffering function.

[0022] Furthermore, by adjusting the pre-tightening force of the pre-tightening mechanism, the stiffness of the buffer system can be changed, so as to adapt to the vibration frequencies of hydrogen fuel cell bodies of different models, avoid resonance phenomena, and improve the durability of the hydrogen fuel cell body.

[0023] This application also transmits the pre-tightening force through the transmission connecting rod. Since the force is transmitted from the short arm to the long arm, the long arm side where the elastic element is located actually bears the amplified displacement and reduced force. Therefore, on the premise of meeting the system buffering requirements, the elastic element can be selected with a shorter, smaller, and more compact specification. This greatly reduces the design volume and is conducive to the layout of the system in a limited space, especially suitable for application scenarios such as hydrogen fuel cell systems with extremely high requirements for structural compactness. Brief Description of the Drawings

[0024] Figure 1 is a three-dimensional view of a hydrogen fuel cell box structure of the present invention.

[0025] Figure 2 is an exploded three-dimensional view of a hydrogen fuel cell box structure of the present invention.

[0026] Figure 3 is a top view of a buffer device in a hydrogen fuel cell box structure of the present invention.

[0027] Figure 4 is a three-dimensional view of a buffer device in a hydrogen fuel cell box structure of the present invention.

[0028] Figure 5 is a three-dimensional view of a pressing block in a hydrogen fuel cell box structure of the present invention.

[0029] Figure 6 is a three-dimensional view of the first embodiment of a pre-tightening mechanism in a hydrogen fuel cell box structure of the present invention.

[0030] Figure 7 is an exploded three-dimensional view of the first embodiment of a pre-tightening mechanism in a hydrogen fuel cell box structure of the present invention.

[0031] Figure 8 is a schematic diagram of the second embodiment of a pre-tightening mechanism in a hydrogen fuel cell box structure of the present invention.

[0032] Figure 9 is a schematic diagram of the buffer device in a hydrogen fuel cell box structure of the present invention when buffering lateral vibration.

[0033] Figure 10 is a schematic diagram of a hydrogen fuel cell box structure of the present invention having three pairs of buffer components.

[0034] The reference numerals in the figures are: 1, hydrogen fuel cell body; 21, pressing block; 211, tapered groove; 22, pre-tightening mechanism; 221, adjusting plate; 222, transmission block; 223, transmission connecting rod; 224, pivot; 23, elastic buffer element; 24, bidirectional lead screw; 25, positioning block; 26, guide rail; 27, connecting plate; 271, connecting ball head. Detailed implementation manners

[0035] To further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0036] As Figures 1-5 shown, a hydrogen fuel cell box structure includes a box body for installing a hydrogen fuel cell body 1. A buffer device for buffering the movement of the hydrogen fuel cell body 1 relative to the box body is provided inside the box body to reduce the damage to the battery body caused by vibration and external force impact.

[0037] The buffer device includes at least a pair of buffer components, and each pair of buffer components is respectively arranged at two side positions of the hydrogen fuel cell body 1 that are relatively parallel; in addition, the buffer device further includes a connecting plate 27 installed on both sides of the hydrogen fuel cell body 1 and connected to the buffer components.

[0038] Each buffer component includes at least a pair of pressing blocks 21, and a pre-tightening mechanism 22 acting on this pair of pressing blocks 21 to make them approach each other. A conical groove 211 is formed between the two pressing blocks 21 for realizing self-adaptive limit fitting; a connecting ball head 271 matching with the conical groove 211 is provided on the connecting plate 27, and the connecting ball head 271 can move and rotate in the conical groove 211.

[0039] Among them, the approaching direction of the pressing blocks 21 is parallel to the side direction of the hydrogen fuel cell body 1 they face, ensuring that when the battery body undergoes displacement, the buffer response has good direction consistency.

[0040] When the battery body undergoes lateral, longitudinal or oblique displacement due to external loads or vibrations, the connecting ball head 271 will generate corresponding displacements in the conical groove 211, and convert these displacements into actions of the pressing blocks 21 in the pre-tightening direction. Through the elastic pre-tightening force provided by the pre-tightening mechanism 22, multi-directional buffering and limit constraints on the battery body are realized, effectively preventing it from making hard collisions with the box body, thereby improving the overall seismic performance and structural reliability of the system.

[0041] As Figure 3 shown, the buffer component further includes a guide rail 26 for installing a pair of pressing blocks 21, and the pre-tightening mechanism 22 presses the two pressing blocks 21 close to each other along the length direction of the guide rail 26.

[0042] The buffer component further includes a set of guide rail 26 structures for installing and guiding the movement of a pair of pressing blocks 21. The guide rail 26 is preferably arranged in pairs and parallel to both sides of the buffer component to form a stable linear movement channel. Each pressing block 21 can slide along the length direction of the guide rail 26 and maintain its stable posture, avoiding deviation or jamming, thereby ensuring the consistency and reliability of the buffer response.

[0043] The pre-tightening mechanism 22 is provided at the end or inside of the guide rail 26 structure, and its acting direction is consistent with the length direction of the guide rail 26. It can continuously apply an elastic pre-tightening force during the movement of the pressing block 21, so that the two pressing blocks 21 are always in a state of approaching each other.

[0044] As Figure 5 shown, each of the pair of pressing blocks 21 is provided with a special-shaped groove. After the special-shaped grooves on the two pressing blocks 21 approach and are spliced together, they jointly form a complete tapered groove 211 structure, which is used to form an adaptive nested fit with the connecting ball head 271 on the connecting plate 27 of the hydrogen fuel cell body 1.

[0045] When the hydrogen fuel cell body 1 is displaced relative to the box body due to external impact or vibration, the connecting ball head 271 will achieve adaptive movement inside the tapered groove 211. Since the tapered groove 211 is jointly formed by two special-shaped grooves and is subjected to the pressure applied by the pre-tightening mechanism 22, the connecting ball head 271 will be automatically guided to the center of the structure, thereby generating a stable return force and damping effect. This structure can not only achieve buffer response in multiple degrees of freedom directions, but also, due to the structural characteristics of the special-shaped groove, can suppress the rotation or tilting trend of the system to a certain extent, improving the stability and anti-disturbance ability of the system.

[0046] As Figure 3 and Figure 9 shown, the pre-tightening mechanism 22 includes a positioning plate group corresponding to each pair of buffer components. On the relative sides of the positioning plate group along the approaching direction of the pressing block 21, there are respectively provided a force transmission arm group connected to the corresponding pressing block 21, and an elastic buffer element 23 is arranged between the force transmission arm group and the positioning plate group.

[0047] As the first embodiment of the pre-tightening mechanism 22, the pre-tightening mechanism 22 further includes a positioning plate group corresponding to each pair of buffer components. This positioning plate group is preferably arranged at both ends of the movement direction of the pressing block 21, used to provide a stable support reference for the pre-tightening system, and ensure that the movement of the pressing block 21 is always controlled along the set path. Each group of positioning plates can be fixedly installed on the outer frame structure of the buffer component.

[0048] On the relative inner sides of the positioning plate group, along the approaching direction of the pressing block 21, there are respectively provided a force transmission arm group connected to the corresponding pressing block 21. The force transmission arm group is mainly used to effectively transmit the pre-tightening force generated by the elastic buffer element 23 to the pressing block 21, realizing the functions of driving, guiding and stabilizing the pressing block 21. One end of each force transmission arm is connected to the pressing block 21 by a rotational or sliding connection method, and the other end is relatively connected to the positioning plate group, forming a movable lever-type or slider-type force transmission structure.

[0049] An elastic buffer element 23 is provided between the force transmission arm group and the positioning plate group. The elastic buffer element 23 is used to provide a continuous elastic pre-tightening force, and at the same time absorb the impact load caused by the movement of the hydrogen fuel cell body 1, playing a role of two-way buffering and automatic reset.

[0050] The elastic buffer element 23 can be fixed on the positioning plate group through a limit groove, a snap ring seat or an external sleeve, and forms a complete power transmission chain with the force transmission arm and the pressing block 21 to realize the directional transmission of the acting force of the elastic element.

[0051] In the working state, when the hydrogen fuel cell body 1 generates lateral, longitudinal or oblique displacement due to external load or vibration, the connecting ball head 271 drives the pressing block 21 to generate displacement through the conical groove 211, and then drives the force transmission arm to compress the elastic buffer element 23, releasing a reverse restoring force to inhibit further displacement of the system. This structure has good self-adaptive adjustment ability and anti-impact stability, can realize the rapid response and effective rebound of the multi-directional movement of the battery body, and greatly improve the operation safety and structural life of the fuel cell module in a complex environment.

[0052] As Figure 3 and Figure 9 shown, the positioning plate group includes a pair of adjusting plates 221. The distance between the pair of adjusting plates 221 is adjustably arranged in the box body. The elastic buffer element 23 is arranged between the force transmission arm group and the adjusting plate 221. The pre-tightening mechanism 22 further includes a bidirectional lead screw 24 rotatably arranged in the box body. The bidirectional lead screw 24 respectively penetrates through the two adjusting plates 221 and is threadedly connected with them.

[0053] The positioning plate group further includes a pair of adjusting plates 221 arranged in parallel with each other. The pair of adjusting plates 221 are arranged symmetrically left and right and are installed on the opposite sides of the internal structure of the box body for serving as a reference support surface of the elastic buffer mechanism.

[0054] In this structure, the elastic buffer element 23 is arranged between each adjusting plate 221 and the corresponding force transmission arm, and is used to provide a flexible response and elastic return ability when the pressing block 21 is stressed. The elastic element not only undertakes the dynamic buffering task, but also provides a continuous and stable pre-tightening force in the static state to maintain the reliable contact between the pressing block 21 and the ball head structure, so as to keep the whole buffer system in a response-ready state.

[0055] In order to realize the efficient, synchronous and controllable adjustment of the distance between the adjusting plates 221, a bidirectional lead screw 24 is further provided in the pre-tightening mechanism 22. The bidirectional lead screw 24 is rotatably arranged inside the box body, and its two ends respectively penetrate through a pair of adjusting plates 221 and form a reliable threaded connection with the threaded hole structure on the adjusting plates 221. By rotating the lead screw, the two adjusting plates 221 can be driven to move synchronously in the opposite direction to realize the adjustment and setting of the initial state of the whole pre-tightening mechanism 22.

[0056] The two-way lead screw 24 is preferably designed with a symmetric pitch, that is, threads with opposite helix directions (such as left-handed and right-handed threads) are arranged from the center of the lead screw to both ends, so as to ensure that the two adjusting plates 221 can move equidistantly in opposite directions when the lead screw rotates, thereby maintaining structural symmetry and force balance. The lead screw can be operated by a hexagonal head, a manual handle, a planetary gear set drive, or even integrated with an electric servo control unit to achieve automatic adjustment and remote control.

[0057] As Figure 6 and Figure 7 shown, the force transmission arm group includes a transmission block 222. The transmission block 222 is movably arranged on one side of the positioning plate group along the approaching direction of the pressing block 21. An elastic buffer element 23 is arranged between the positioning plate group and the transmission block 222. A transmission connecting rod 223 is arranged between the transmission block 222 and its corresponding pressing block 21. A pivot 224 connected to the box body is arranged on the transmission connecting rod 223. Both ends of the transmission connecting rod 223 are floatingly connected to the transmission block 222 and the pressing block 21 respectively.

[0058] The force transmission arm group includes a transmission block 222, which is designed to be able to move freely on one side of the positioning plate group along the approaching direction of the pressing block 21, so as to achieve precise force transmission and adjustment of the pressing block 21. The installation method of the transmission block 222 is a sliding connection, and a slide rail, a chute or a low-friction guide is used to ensure that it can move smoothly and maintain stability during the adjustment process.

[0059] An elastic buffer element 23 is arranged between the transmission block 222 and the positioning plate group. The main function of this element is to absorb the vibration and oscillation caused by external impact or system operation during the movement of the transmission block 222, and provide the necessary elastic resilience. This buffer design not only effectively avoids the hard collision that may occur when the transmission block 222 directly contacts the positioning plate group, but also can adjust the dynamic response of the transmission system and provide a softer and more stable control force for the pressing block 21.

[0060] To ensure the force transmission and dynamic adjustment between the transmission block 222 and the corresponding pressing block 21, a transmission connecting rod 223 is arranged between the transmission block 222 and the pressing block 21. The transmission connecting rod 223 ensures the synchronism and coordination of the two when the pressing block 21 is displaced through its connection with the pressing block 21 and the transmission block 222.

[0061] In the middle of the transmission connecting rod 223, a pivot 224 connected to the box body is arranged. The pivot 224 can provide a freely rotating support during operation, ensuring that the transmission connecting rod 223 can perform flexible displacement and adjustment under the action of force.

[0062] Both ends of the transmission connecting rod 223 are respectively and floatingly connected to the transmission block 222 and the pressing block 21. Both ends of the transmission connecting rod 223 are provided with chutes along its length direction. Among them, the transmission block 222 end is connected to the chute at one end of the transmission connecting rod 223 through a shaft member, so as to ensure that it can be adjusted when needed without generating resistance or jamming. The pressing block 21 end is then matched with the chute at the other end of the transmission connecting rod 223 through a shaft member, so that it can move along with the displacement of the transmission block 222 during operation, ensuring that the system is always in the best contact and pressure distribution state during operation.

[0063] Through the transmission connecting rod 223, the acting force of the elastic buffer element 23 can be transmitted to the pressing block 21, thereby realizing buffering.

[0064] As Figure 6 and Figure 7 shown, the rod length from the connecting end of the transmission connecting rod 223 to the pressing block 21 to the pivot 224 is less than the rod length from the connecting end of the transmission connecting rod 223 to the transmission block 222 to the pivot 224.

[0065] Considering that the hydrogen fuel cell body 1 has a large weight, which poses higher strength and stroke requirements for the elastic buffer element 23 when the system provides stable pre-tightening force and buffering capacity. To avoid affecting the structural compactness and integration due to the too large size of the elastic element, the lever principle is introduced in the design of the force transmission mechanism to realize reducing the load demand of the elastic element through a structural amplification mechanism within a limited space, while shortening its length and size.

[0066] Specifically, the rod length from the end of the transmission connecting rod 223 connected to the pressing block 21 to the pivot 224 is set as the short arm, while the rod length from the end of the transmission connecting rod 223 connected to the transmission block 222 to the pivot 224 is set as the long arm, that is, a lever structure for torque amplification is formed. This design enables when the pressing block 21 is subjected to the weight of the hydrogen fuel cell body 1 and external impacts, it acts on the pivot 224 through the short arm, and then is transmitted to the transmission block 222 through the long arm, forming an amplified transmission of force.

[0067] As Figure 8 shown, the pre-tightening mechanism 22 further includes positioning blocks 25 arranged on the back sides of a pair of pressing blocks 21, and springs are arranged between the positioning blocks 25 and the adjacent pressing blocks 21.

[0068] As the second embodiment of the pre-tightening mechanism 22, the pre-tightening mechanism 22 further includes positioning blocks 25 arranged on the back sides of a pair of pressing blocks 21, which are used to provide axial limitation and structural support for the pressing blocks 21. Springs are arranged between each positioning block 25 and the adjacent pressing block 21, which are used to absorb the small displacements and impact energy during the force-bearing process of the pressing blocks 21, and improve the buffering performance and seismic resistance of the system.

[0069] AsFigure 10 As shown, the buffer device has three pairs of buffer components, and the three pairs of buffer components are respectively arranged corresponding to three pairs of mutually parallel sides of the hydrogen fuel cell body 1.

[0070] The buffer device is provided with three pairs of buffer components, which are respectively arranged corresponding to three pairs of mutually parallel sides of the hydrogen fuel cell body 1 to achieve all-round support and buffer protection for it in the horizontal, vertical or oblique directions. A symmetrical arrangement is formed between the buffer components, which can effectively absorb multi-directional vibrations and impact loads generated during the transportation or operation of the body, ensuring that the battery module is always in a stable and controlled constrained state.

[0071] As Figure 10 shown, each buffer component has a pair of pressing blocks 21, and the connecting ball head 271 cooperating with the pair of pressing blocks 21 is arranged at the center position on the side of the hydrogen fuel cell body 1.

[0072] Each buffer component includes a pair of relatively arranged pressing blocks 21 for applying an equal clamping force to the side of the hydrogen fuel cell body 1. The connecting ball head 271 cooperating with the pressing block 21 is installed at the geometric center position on the side of the fuel cell body to ensure symmetrical force and the shortest force transmission path, effectively reducing the risk of local stress concentration.

[0073] The above embodiments only represent one or several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. A hydrogen fuel cell box structure, including a box body for installing a hydrogen fuel cell body (1), characterized in that, A buffer device for buffering the movement of the hydrogen fuel cell body (1) relative to the box body is built into the box body; The buffer device includes at least a pair of buffer components and a pair of connecting plates (27) mounted on the hydrogen fuel cell body (1) and connected to the buffer components; The same pair of buffer components are arranged on the mutually parallel sides of the hydrogen fuel cell body (1). Each buffer component has at least a pair of pressing blocks (21) and a pre-tightening mechanism (22) for driving the pair of pressing blocks (21) to approach each other. A conical groove (211) is formed at the place where the two pressing blocks (21) abut against each other. A connecting ball head (271) matching with the conical groove (211) is arranged on the connecting plate (27); the direction of the approaching movement of the pressing block (21) is parallel to the side surface of the hydrogen fuel cell body (1) facing it; When the hydrogen fuel cell body (1) moves relative to the box body in the transverse, longitudinal or oblique direction, the connecting ball head (271) converts the movement of the hydrogen fuel cell body (1) into the displacement of the pressing block (21) along the pre-tightening force direction applied by the pre-tightening mechanism (22) to the pressing block (21) through the conical groove (211), thereby realizing the buffering of the movement of the hydrogen fuel cell body (1).

2. The hydrogen fuel cell box structure according to claim 1, characterized in that, The buffer component further includes a guide rail (26) for mounting a pair of the pressing blocks (21), and the pre-tightening mechanism (22) approaches the two pressing blocks (21) along the length direction of the guide rail (26).

3. A hydrogen fuel cell box structure according to claim 1, characterized in that, Each of the pair of pressing blocks (21) is provided with a special-shaped groove, and the two special-shaped grooves are spliced to form the conical groove (211).

4. A hydrogen fuel cell box structure according to any one of claims 1-3, characterized in that, The pre-tightening mechanism (22) includes a positioning plate group correspondingly connected to each pair of buffer components. On the opposite sides of the positioning plate group along the approaching direction of the pressing block (21), a force transmission arm group connected to the corresponding pressing block (21) is respectively arranged, and an elastic buffer element (23) is arranged between the force transmission arm group and the positioning plate group.

5. The hydrogen fuel cell box structure according to claim 4, characterized in that, The positioning plate group includes a pair of adjusting plates (221), the distance between the pair of adjusting plates (221) is adjustably arranged in the box body, the elastic buffer element (23) is arranged between the force transmission arm group and the adjusting plate (221), and the pre-tightening mechanism (22) further includes a bidirectional lead screw (24) rotatably arranged in the box body. The bidirectional lead screw (24) respectively penetrates through the two adjusting plates (221) and is threadedly connected to them.

6. The hydrogen fuel cell box structure according to claim 4, characterized in that, The force transmission arm group includes a transmission block (222), the transmission block (222) is movably arranged on one side of the positioning plate group along the approaching direction of the pressing block (21), the elastic buffer element (23) is arranged between the positioning plate group and the transmission block (222), a transmission connecting rod (223) is arranged between the transmission block (222) and its corresponding pressing block (21), a pivot (224) connected to the box body is arranged on the transmission connecting rod (223), and the two ends of the transmission connecting rod (223) are respectively floatingly connected to the transmission block (222) and the pressing block (21).

7. The hydrogen fuel cell box structure according to claim 6, characterized in that, The rod length from the connecting end of the transmission connecting rod (223) to the pressing block (21) to the pivot (224) is less than the rod length from the connecting end of the transmission connecting rod (223) to the transmission block (222) to the pivot (224).

8. A hydrogen fuel cell box structure according to any one of claims 1-3, characterized in that, The pre-tightening mechanism (22) further includes a positioning block (25) disposed on the back side of a pair of pressing blocks (21), and a spring is provided between the positioning block (25) and the adjacent pressing block (21).

9. A hydrogen fuel cell box structure according to any one of claims 1-3, characterized in that, The buffer device has three pairs of buffer components, and the three pairs of buffer components are respectively arranged corresponding to three pairs of mutually parallel side surfaces of the hydrogen fuel cell body (1).

10. A hydrogen fuel cell box structure according to claim 9, characterized in that, Each buffer component has a pair of pressing blocks (21), and a connecting ball head (271) cooperating with the pair of pressing blocks (21) is disposed at the center position of the side surface of the hydrogen fuel cell body (1).

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