Modularized hydrogen storage system for hydrogen fuel cell

Abstract

The utility model discloses a modularized hydrogen storage system for a hydrogen fuel cell, which comprises a hydrogen storage tank, two ends of the hydrogen storage tank are respectively communicated with an exhaust valve and a gas injection valve; the partition plates are fixedly arranged in the hydrogen storage tank at equal intervals, a plurality of connecting holes are formed in the partition plates at equal intervals in the perimeter direction of the partition plates, and flow dividing mechanisms are arranged on the partition plates and used for dividing gas exhausted by the gas injection valve; and every two sealing plates form a group. In the using process of the improved hydrogen storage tank, when part of the hydrogen storage tank is broken and hydrogen leaks, the partition operation of the corresponding position in the hydrogen storage tank can be automatically completed so as to cut off the flowing-out of the hydrogen in the hydrogen storage tank, finally, the concentration of the floating hydrogen outside the device is greatly reduced, and the danger is low when the device is used; and meanwhile, the original hydrogen injection mode of the hydrogen storage tank is hardly changed, so that a user can quickly adapt to the use of the hydrogen storage tank.

Description

Technical Field

[0001] This utility model relates to the technical field of hydrogen storage devices, and in particular to a modular hydrogen storage system for hydrogen fuel cells. Background Technology

[0002] Modular hydrogen storage systems are highly integrated hydrogen storage solutions that improve storage capacity and system flexibility through modular design. A modular hydrogen storage system typically consists of multiple hydrogen storage modules, each containing key components such as a hydrogen storage tank, integrated valve, and integrated pressure regulation module. These components work together to ensure the safe and efficient operation of the hydrogen storage system. This modular design not only increases the hydrogen storage capacity but also improves the overall rigidity of the system, providing technical support for the mass production of fuel cells on pure electric platforms.

[0003] In some existing modular hydrogen storage systems, the hydrogen storage tanks are generally placed directly in the external environment, and their internal high-pressure hydrogen storage is completed through a single cavity to supply hydrogen to the hydrogen fuel cell. Since all the hydrogen is stored in a single cavity, if the hydrogen storage tank leaks due to collision or compression from external objects, a large amount of hydrogen stored inside will leak out directly. Due to the outflow of a large amount of hydrogen, the outside of the device becomes covered with a relatively concentrated flammable gas, making the device highly dangerous to use. Utility Model Content

[0004] The purpose of this invention is to provide a modular hydrogen storage system for hydrogen fuel cells, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a modular hydrogen storage system for hydrogen fuel cells, comprising a hydrogen storage tank, with an exhaust valve and an injection valve respectively connected to its two ends;

[0006] Also includes:

[0007] Several partitions are fixedly installed at equal intervals inside the hydrogen storage tank. Several connecting holes are equally spaced on the partitions along the perimeter of the partitions. Several partitions are provided with a diversion mechanism for diverting the gas discharged from the gas injection valve.

[0008] Several sealing plates, two of which are grouped together, and the two sealing plates in each group are positioned opposite each other on both sides of the corresponding partition plate to block the openings of the corresponding connection holes. The sealing plates and the partition plate are connected by an elastic element.

[0009] Preferably, the diversion mechanism includes a circular tube that is fixedly inserted through the middle position of several partitions, and the air inlet end of the circular tube is fixedly sleeved on the outer periphery of the air injection valve, and several exhaust holes are opened on the outer periphery of the circular tube.

[0010] Preferably, the partition is located between two corresponding exhaust holes, and a one-way pressure relief valve is fixedly installed in each exhaust hole.

[0011] Preferably, the elastic element includes a plurality of piston rods, and a plurality of air storage grooves are arranged in a circumferential array on the partition plate, and each air storage groove is clearance-fitted with a corresponding connecting hole. One end of the piston rod is slidably installed in the corresponding air storage groove, and the other end of the piston rod is fixedly connected to the corresponding partition plate.

[0012] Preferably, the partition plate and the wall of the circular tube are provided with a number of connecting holes, and the interior of the gas storage tank is connected to the interior of the circular tube through the corresponding connecting holes.

[0013] Preferably, a mesh-like support structure is formed between the plurality of connecting holes and the round tube, and an annular groove is provided on the side of the sealing plate near the corresponding partition, and a sealing ring is slidably installed in the annular groove.

[0014] This utility model has the following beneficial effects:

[0015] During use, this improved hydrogen storage tank can automatically shut off the corresponding location inside the tank when hydrogen leaks from a broken section, thus cutting off the outflow of hydrogen and significantly reducing the concentration of hydrogen drifting outside the device. The device is low-risk to use and hardly changes the original hydrogen injection method, allowing users to quickly adapt to its use. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a perspective view of the overall structure of the hydrogen storage tank of this utility model;

[0018] Figure 2 This is a front view of the internal structure of the hydrogen storage tank of this utility model;

[0019] Figure 3 This is a perspective view of the overall structure of the partition of this utility model;

[0020] Figure 4 This is a perspective view of the internal structure of the partition and part of the circular tube of this utility model;

[0021] Figure 5 This utility model Figure 4 Enlarged view of the structure at point A in the middle.

[0022] In the diagram: 1. Hydrogen storage tank; 2. Gas injection valve; 3. Baffle plate; 4. Connection hole; 5. Diverting mechanism; 51. Circular pipe; 52. Exhaust port; 53. One-way pressure relief valve; 6. Sealing plate; 7. Elastic element; 71. Gas storage tank; 72. Piston rod; 73. Connecting hole; 8. Support structure; 9. Annular groove; 10. Sealing ring. Detailed Implementation

[0023] To make the technical solution and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] This utility model provides a technical solution: (Refer to...) Figure 1 - Figure 5 The present invention discloses a modular hydrogen storage system for hydrogen fuel cells, including a hydrogen storage tank 1, with an exhaust valve and an injection valve 2 respectively connected to its two ends;

[0025] Also includes:

[0026] Several partitions 3 are fixedly installed at equal intervals inside the hydrogen storage tank 1. Several connecting holes 4 are equally spaced on the partitions 3 along the perimeter of the partitions 3. Several partitions 3 are provided with a diversion mechanism 5 for diverting the gas discharged from the gas injection valve 2.

[0027] Several sealing plates 6 are arranged in pairs, and the two sealing plates 6 in each pair are positioned opposite each other on both sides of the corresponding partition 3 to block the opening of the corresponding connecting hole 4. The sealing plates 6 and the partition 3 are connected by elastic members 7.

[0028] In this embodiment, please refer to Figure 2 - Figure 4 As shown, when injecting hydrogen into the hydrogen storage tank 1, the gas supply pipe of the hydrogen injection equipment is connected to the injection valve 2. Hydrogen is then continuously injected into the hydrogen storage tank 1 through the injection valve 2. At this time, the diversion mechanism 5 guides and diverts the hydrogen injected into the hydrogen storage tank 1, causing the gas in the hydrogen storage tank 1 to be divided into several streams and injected into several hydrogen storage chambers respectively. (Please refer to...) Figure 2 As shown, several partitions 3 divide the hydrogen storage tank 1 into several hydrogen storage chambers. Due to the synchronous injection of hydrogen into several hydrogen storage chambers, only a very small pressure difference will be generated on both sides of the partition 3. There will be no large gas flow in the connection hole 4. At this time, due to the support of the elastic element 7 on the sealing plate 6, the sealing plate 6 will not move towards the partition 3 to block the opening of the connection hole 4, so that the pressure in each part of the hydrogen storage tank 1 is relatively balanced. The gas injected into the hydrogen storage tank 1 can still be injected quickly, and the original hydrogen injection method in the hydrogen storage tank 1 will hardly change.

[0029] When hydrogen gas flows out from the exhaust valve in hydrogen storage tank 1, the hydrogen gas in hydrogen storage tank 1 passes through the gap between the sealing plate 6 and the partition plate 3 and the connecting hole 4 and passes over the partition plate 3 to freely exchange and flow hydrogen gas in each hydrogen storage chamber. This ensures that the pressure in each hydrogen storage chamber is always equal, thereby avoiding pressure differences in different parts of hydrogen storage tank 1, which would cause uneven stress on the tank wall of hydrogen storage tank 1 and affect the use of hydrogen storage tank 1.

[0030] When a leak occurs in part of the hydrogen storage tank 1 due to the impact and compression of external objects, the flow rate of hydrogen in the gap between the sealing plate 6 and the partition plate 3 and the connecting hole 4 increases rapidly due to the pressure difference inside and outside the hydrogen storage tank 1. This causes the thrust of hydrogen on the sealing plate 6 to increase rapidly, thereby offsetting the thrust of the elastic element 7 on the sealing plate 6, so that the sealing plate 6 and the partition plate 3 are tightly attached. At this time, due to the pressure difference on both sides of the partition plate 3, the sealing plate 6 is stably attached to the partition plate 3, and the connecting hole 4 is automatically and immediately sealed to cut off the outflow of hydrogen in the hydrogen storage tank 1. Ultimately, this greatly reduces the concentration of hydrogen drifting outside the device, and the danger of the device during use is low.

[0031] In a further preferred embodiment of this utility model, such as Figure 2 and Figure 4 As shown, the diversion mechanism 5 includes a circular tube 51, which is fixedly inserted through the middle position of several partitions 3, and the air inlet end of the circular tube 51 is fixedly sleeved on the outer periphery of the air injection valve 2. Several exhaust holes 52 are opened on the outer periphery wall of the circular tube 51.

[0032] In this embodiment, please refer to Figure 2 and Figure 4 As shown, after external hydrogen flows into the hydrogen storage tank 1 through the gas injection valve 2, it first flows into the circular pipe 51, and then flows out through several vent holes 52, flowing into several hydrogen storage chambers respectively, so that the hydrogen storage chambers are raised almost synchronously, so as to avoid a large pressure difference between the hydrogen storage chambers.

[0033] In a further preferred embodiment of this utility model, such as Figure 2 and Figure 4 As shown, the partition 3 is located between the two corresponding exhaust holes 52, and a one-way pressure relief valve 53 is fixedly installed inside the exhaust hole 52;

[0034] In this embodiment, please refer to Figure 4 As shown, after hydrogen is injected into the circular tube 51, a high-pressure chamber will first be formed in the circular tube 51 due to the obstruction of the one-way pressure relief valve 53. Then, after a sufficient pressure difference is generated at both ends of the one-way pressure relief valve 53, the hydrogen in the circular tube 51 will flow into the hydrogen storage tank 1. And due to the obstruction of the one-way pressure relief valve 53, when the gas pressure in the hydrogen storage tank 1 decreases, the hydrogen in the hydrogen storage tank 1 will not flow back into the circular tube 51.

[0035] In a further preferred embodiment of this utility model, such as Figure 4 and Figure 5 As shown, the elastic element 7 includes several piston rods 72, and several air storage grooves 71 are arranged in a circular array on the partition 3. Each air storage groove 71 is clearance-fitted with the corresponding connecting hole 4. One end of the piston rod 72 is slidably installed in the corresponding air storage groove 71, and the other end of the piston rod 72 is fixedly connected to the corresponding partition 3.

[0036] In this embodiment, please refer to Figure 4 and Figure 5 As shown, when the airflow increases the thrust on the baffle 3, it will push the piston rod 72 into the air storage tank 71 through the baffle 3 until the piston rod 72 is completely retracted into the air storage tank 71. At this time, the sealing plate 6 is in close contact with the baffle 3.

[0037] In a further preferred embodiment of this utility model, such as Figure 5 As shown, several connecting holes 73 are provided in both the partition plate 3 and the pipe wall of the circular tube 51, and the interior of the gas storage tank 71 is connected to the interior of the circular tube 51 through the corresponding connecting holes 73.

[0038] In this embodiment, please refer to Figure 4 and Figure 5 As shown, during the hydrogen injection process of the circular pipe 51, some hydrogen flows into the storage tank through the connecting hole 73, so that the storage tank and the circular pipe 51 simultaneously form a high-pressure chamber of corresponding intensity. After the hydrogen storage tank 1 is filled with hydrogen, the circular pipe 51 and the storage tank store a corresponding amount of gas. Then the hydrogen injection device extracts a corresponding amount of hydrogen from the circular pipe 51, so that a high-pressure chamber of specific intensity is formed in the storage tank. At this time, the piston rod 72 is always subjected to a corresponding thrust in the direction of the sealing plate 6. The use of this improved hydrogen storage tank 1 will not increase the maintenance workload of the hydrogen storage tank 1.

[0039] During the process of piston rod 72 retracting into storage tank, some of the hydrogen gas in storage tank flows into circular tube 51 through connecting hole 73, so that the thrust on piston rod 72 hardly increases during the process of piston rod 72 retracting into storage tank.

[0040] In a further preferred embodiment of this utility model, such as Figure 3 As shown, a mesh-like support structure 8 is formed between several connecting holes 4 and the round tube 51. An annular groove 9 is provided on the side of the sealing plate 6 near the corresponding partition 3. A sealing ring 10 is slidably installed in the annular groove 9.

[0041] In this embodiment, please refer to Figure 3 and Figure 4As shown, when the sealing plate 6 and the partition plate 3 are attached, due to the compression of the sealing ring 10 by the sealing plate 6 and the partition plate 3, the sealing ring 10 automatically and adaptively shrinks and deforms according to the contact position with the partition plate 3, thereby forming a contact surface that is tightly attached to the partition plate 3, so as to enhance the sealing effect of the sealing plate 6. At the same time, the mesh support structure 8 can support the sealing plate 6 from multiple positions in the middle of the sealing plate 6, so as to avoid the sealing plate 6 being pushed by external force for a long time, which would cause the sealing plate 6 to deform and affect the use of the device.

[0042] Working principle: When injecting hydrogen into the hydrogen storage tank 1, the gas supply pipe of the hydrogen injection device is connected to the gas injection valve 2, and then hydrogen is continuously injected into the gas injection valve 2. The hydrogen flowing out of the gas injection valve 2 then flows into the circular tube 51. Due to the obstruction of the one-way pressure relief valve 53, a high-pressure chamber will first be formed in the circular tube 51, and part of the hydrogen in the circular tube 51 flows into the storage tank through the connecting hole 73, so that the storage tank and the circular tube 51 simultaneously form a high-pressure chamber of corresponding strength, thereby causing the thrust on the piston rod 72 to gradually increase, and reaching the limit after a sufficient pressure difference is generated at both ends of the one-way pressure relief valve 53. At this time, the excess hydrogen in the circular tube 51 flows into several hydrogen storage chambers through the exhaust hole 52 and the one-way pressure relief valve 53 respectively. Due to the synchronous injection of hydrogen in several hydrogen storage chambers, there is almost no pressure difference on both sides of the partition 3, and only a very small gas flow will be generated in the connecting hole 4. The flowing gas generates a small thrust on the sealing plate 6, and the sealing plate 6 will not move towards the partition 3 to block the opening of the connecting hole 4.

[0043] It should be noted that even if a relatively rapid gas flow occurs on both sides of the partition 3, the piston rod 72 will also be subjected to a great thrust at the same time, and the sealing plate 6 will never stick to the partition 3, thus not affecting the rapid injection of hydrogen into the hydrogen storage tank 1.

[0044] It should be noted that after the hydrogen storage tank 1 is filled with hydrogen, the circular tube 51 and the storage tank store a corresponding amount of gas. Then, the hydrogen injection device extracts a corresponding amount of hydrogen from the circular tube 51 to form a high-pressure chamber of a specific intensity in the storage tank. At this time, the piston rod 72 is always subjected to a corresponding thrust in the direction of the sealing plate 6 to avoid the sealing plate 6 being too small and affecting the use of the device.

[0045] When hydrogen gas flows out from the exhaust valve in hydrogen storage tank 1, the hydrogen gas in hydrogen storage tank 1 passes through the gap between the sealing plate 6 and the partition plate 3 and the connecting hole 4 and passes over the partition plate 3 to freely exchange and flow hydrogen gas in each hydrogen storage chamber, so that the pressure in each hydrogen storage chamber is always equal, so as to avoid pressure difference in different parts of hydrogen storage tank 1, which would cause uneven stress on the tank wall of hydrogen storage tank 1.

[0046] When a leak occurs in part of the hydrogen storage tank 1 due to the impact and compression of external objects, the flow rate of hydrogen in the gap between the sealing plate 6 and the partition 3 and the connecting hole 4 increases rapidly due to the pressure difference inside and outside the hydrogen storage tank 1. This causes the thrust of hydrogen on the sealing plate 6 to increase rapidly, thus pushing the piston rod 72 into the storage tank through the sealing plate 6. During the process of the piston rod 72 retracting into the storage tank, some of the hydrogen in the storage tank flows into the circular pipe 51 through the connecting hole 73. During the process of the piston rod 72 retracting into the storage tank, only the hydrogen in a large space is compressed, and the thrust on the piston rod 72 hardly increases. This allows the hydrogen in the hydrogen storage tank 1 to adhere to the sealing plate 6 in time when it leaks. At this time, due to the pressure difference on both sides of the partition 3, the sealing plate 6 is stably and tightly attached to the partition 3, automatically and immediately sealing the connecting hole 4 to cut off the outflow of hydrogen in the hydrogen storage tank 1.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A modular hydrogen storage system for hydrogen fuel cell, comprising a hydrogen storage tank (1) having an exhaust valve and a gas injection valve (2) respectively installed at two ends thereof; characterized in that Further comprising: a plurality of partition plates (3) fixedly installed in the hydrogen storage tank (1) at equal intervals, a plurality of connecting holes (4) being formed in the partition plates (3) at equal intervals along the circumferential direction of the partition plates (3), and a plurality of the partition plates (3) being provided with a shunt mechanism (5) for shunting the gas discharged by the gas injection valve (2); a plurality of sealing plates (6) arranged in pairs, each pair of the sealing plates (6) being oppositely arranged on two sides of a corresponding partition plate (3) for sealing the opening of a corresponding connecting hole (4), and the sealing plates (6) being connected to the partition plates (3) by elastic members (7).

2. A modular hydrogen storage system for a hydrogen fuel cell according to claim 1, characterized in that: The shunt mechanism (5) comprises a circular tube (51) fixedly penetrating the middle positions of the plurality of partition plates (3), and the gas inlet end of the circular tube (51) is fixedly sleeved on the outer circumferential side of the gas injection valve (2), and a plurality of exhaust holes (52) are formed in the outer circumferential wall of the circular tube (51).

3. A modular hydrogen storage system for a hydrogen fuel cell according to claim 2, characterized in that: The partition plates (3) are located between the corresponding two exhaust holes (52), and a one-way pressure limiting valve (53) is fixedly installed in each exhaust hole (52).

4. A modular hydrogen storage system for a hydrogen fuel cell according to claim 3, characterized in that: The elastic member (7) comprises a plurality of piston rods (72), a plurality of gas storage grooves (71) are formed in the partition plates (3) in a circumferential array, each gas storage groove (71) is in clearance fit with a corresponding connecting hole (4), one end of each piston rod (72) is slidably installed in a corresponding gas storage groove (71), and the other end of the piston rod (72) is fixedly connected to a corresponding partition plate (3).

5. A modular hydrogen storage system for a hydrogen fuel cell according to claim 4, characterized in that: A plurality of communication holes (73) are formed in the partition plates (3) and the wall of the circular tube (51), and the interior of each gas storage groove (71) is in communication with the interior of the circular tube (51) through a corresponding communication hole (73).

6. A modular hydrogen storage system for a hydrogen fuel cell according to claim 5, characterized in that: A net-like support structure (8) is formed between the plurality of connecting holes (4) and the circular tube (51), and each sealing plate (6) is provided with an annular groove (9) on the side close to a corresponding partition plate (3), and a sealing ring (10) is slidably installed in the annular groove (9).

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