Explosion-proof hydrogen storage bottle under high-speed impact condition

Abstract

The invention discloses an anti-explosion hydrogen storage bottle under a high-speed impact condition. The anti-explosion hydrogen storage bottle comprises an aluminum alloy liner, a carbon fiber winding layer and a polyurea elastomer protective layer. The carbon fiber winding layer is fixedly connected to the aluminum alloy inner container in a winding mode and located on the outer side of the aluminum inner container, and a polyurea elastomer protection layer is arranged on the outer layer of the carbon fiber winding layer and tightly attached to the carbon fiber winding layer. The aluminum alloy inner container is wound and wrapped through the carbon fiber winding layer, the overall strength of the hydrogen storage cylinder is improved, good impact resistance and explosion-proof performance are provided through the adoption of the polyurea elastomer protection layer, and the safety of the hydrogen storage cylinder under high-speed impact of foreign objects is ensured through cooperative work of the polyurea elastomer protection layer and the internal carbon fiber winding layer.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hydrogen storage bottles, and particularly relates to an anti-explosion hydrogen storage bottle under high-speed impact conditions. BACKGROUND

[0002] Under the background of carbon neutrality, the development and utilization of renewable clean energy has become a global consensus. Hydrogen is considered an ideal clean energy because it has high calorific value and is clean and pollution-free when burned. Hydrogen storage bottles, as important hydrogen storage equipment, are widely used in fuel cell vehicles, chemical industries and other fields. Type III hydrogen storage bottles made of carbon fiber wound metal liner are high-pressure hydrogen storage containers mainly used in mobile devices such as fuel cell vehicles.

[0003] In use, hydrogen storage bottles may be subjected to external impacts, which can cause the hydrogen storage bottles to break, leak, and even explode, posing a serious threat to personnel safety and surrounding facilities.

[0004] Polyurea is an elastomer material with excellent mechanical properties. As a protective layer of a hydrogen storage bottle, it can absorb energy, buffer, delay damage, and suppress the splashing of fragments under high-speed impact and explosion, while also having the advantages of lightweight, simple processing and installation. SUMMARY

[0005] The purpose of the application is to provide an anti-explosion hydrogen storage bottle under high-speed impact conditions to solve the technical problems of insufficient impact resistance and limited explosion-proof performance of existing type III hydrogen storage bottles under extreme working conditions such as high-speed impact.

[0006] To achieve the above purpose, the application adopts the following technical solutions:

[0007] An anti-explosion hydrogen storage bottle under high-speed impact conditions comprises an aluminum alloy inner container, a carbon fiber winding layer, and a polyurea elastomer protective layer.

[0008] The aluminum alloy inner container is fixedly connected with the carbon fiber winding layer and located outside the aluminum alloy inner container. The carbon fiber winding layer is connected with the polyurea elastomer protective layer and forms a tight covering structure with the carbon fiber winding layer.

[0009] Further, the thickness of the polyurea elastomer protective layer is 5mm, the thickness of the aluminum alloy inner container is 2.5mm, and the thickness of the carbon fiber winding layer is 7.5mm.

[0010] Further, the aluminum alloy inner container is 6061-T6 aluminum alloy, the carbon fiber winding layer is T700 carbon fiber, and the polyurea elastomer protective layer is pure polyurea.

[0011] Further, the polyurea elastomer protective layer extends and completely covers the root area of the valve seat of the bottle mouth.

[0012] Further, the polyurea elastomer protective layer is sleeved on the hydrogen storage bottle in a set manner.

[0013] The hydrogen storage bottle has the advantages that the hydrogen storage bottle is developed by optimizing material selection and a structure of the hydrogen storage bottle.

[0014] 1. The polyurea elastomer protective layer is sleeved on the outer surface of the hydrogen storage bottle to form a composite protective structure. The protective layer can effectively absorb and disperse external energy under high-speed impact conditions, significantly reduce local stress concentration of the bottle body, avoid rapid crack propagation and instantaneous burst, and thus greatly improve the impact resistance and explosion safety of the hydrogen storage bottle.

[0015] 2. The polyurea elastomer material has excellent toughness, buffering performance and wear resistance, can enhance the structural integrity and fatigue life of the bottle body, and slow down damage accumulation caused by repeated charging and discharging or external impact.

[0016] 3. While ensuring high safety, the protective layer has little effect on the overall weight of the bottle body, which is helpful to balance light weight and high strength, is conducive to light weight design of hydrogen fuel vehicles and other mobile applications, and is particularly suitable for hydrogen fuel vehicles and other application scenarios with high requirements for hydrogen storage safety. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a partial sectional view of the explosion-proof hydrogen storage bottle under high-speed impact conditions of the present application;

[0018] Figure 2 is a schematic view of the overall structure of the explosion-proof hydrogen storage bottle under high-speed impact conditions of the present application;

[0019] Figure 3 is a numerical simulation result diagram of the hydrogen storage bottle with the added polyurea elastomer protective layer under high-speed load impact conditions;

[0020] Figure 4 is a numerical simulation result diagram of the hydrogen storage bottle without the added polyurea elastomer protective layer under high-speed load impact conditions;

[0021] The figure mark: 1-polyurea elastomer protective layer, 2-carbon fiber winding layer, 3-aluminum alloy inner container. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] For example, Figure 1As shown, the explosion-proof hydrogen storage bottle under high-speed impact condition includes polyurea elastomer protective layer 1, carbon fiber winding layer 2 and aluminum alloy inner container 3 arranged from outside to inside.

[0024] The aluminum alloy inner container 3 is fixedly connected with the carbon fiber winding layer 2 and located at the outer layer of the aluminum alloy inner container 3, and the carbon fiber winding layer 2 is connected with the polyurea elastomer protective layer 1 and forms a close covering structure with the carbon fiber winding layer 2.

[0025] The thickness of the polyurea elastomer protective layer 1 is 5mm, the thickness of the aluminum alloy inner container 3 is 2.5mm, and the thickness of the carbon fiber winding layer 2 is 7.5mm.

[0026] The aluminum alloy inner container 3 is 6061-T6 aluminum alloy, the carbon fiber winding layer 2 is T700 carbon fiber, and the polyurea elastomer protective layer 1 is pure polyurea.

[0027] The polyurea elastomer protective layer 1 extends and completely covers the root area of the valve seat of the bottle mouth.

[0028] The polyurea elastomer protective layer 1 is installed on the hydrogen storage bottle in a sleeved manner.

[0029] Example 1:

[0030] As shown in Figure 1 An explosion-proof hydrogen storage bottle under high-speed impact condition includes polyurea elastomer protective layer 1, carbon fiber winding layer 2 and aluminum alloy inner container 3. The aluminum alloy inner container 3 is fixedly connected with the carbon fiber winding layer 2 and located at the outer layer of the aluminum alloy inner container 3, and the carbon fiber winding layer 2 is connected with the polyurea elastomer protective layer 1 and forms a close covering structure with the carbon fiber winding layer 2.

[0031] As shown in Figure 1 and Figure 2 The hydrogen storage bottle adopts a type III vehicle-mounted hydrogen storage bottle structure and is composed of the aluminum alloy inner container 3 and the carbon fiber winding layer 2. The bottle body is designed with a working pressure of 3 and a nominal volume of 12L, and the bottle mouth is connected with a valve assembly 101. A polyurea elastomer protective layer 1 is uniformly sleeved on the outer surface of the carbon fiber winding layer 2 of the bottle body. The thickness of the protective layer is 5mm. The polyurea elastomer protective layer 1 is sleeved on the carbon fiber winding layer 2 after being processed by pure polyurea, and the close combination of the protective layer 1 and the carbon fiber winding layer 2 needs to be ensured.

[0032] The hydrogen storage bottle with the above specifications is subjected to impact numerical simulation, and the specific data are as follows:

[0033] For the selection of impact load, a round fragment is used, which is made of 45 steel, with a diameter of 55 mm, a thickness of 2.7 mm, a mass of 50 g, and a fragment incident speed of 200 m / s.

[0034] The winding mode of the carbon fiber winding layer is an alternating combination of hoop and spiral winding, the material is T700, the total thickness of the carbon fiber is 7.5 mm, the mode of balanced layering is used, the single layer thickness is 0.75 mm, there are 10 layers of layering, the sequence and angle are 90°, 90°, ±29°, 90°, 90°, ±19°, 90°, 90° (the 90° direction is the hoop direction of the cylinder).

[0035] The thicknesses of the aluminum alloy inner container and the polyurea elastomer protective layer are 2.5 mm and 5 mm, respectively.

[0036] The part model of the hydrogen storage cylinder of the present embodiment is simulated by using the LS-DYNA finite element simulation software, and two simulation simulations are carried out without adding the polyurea elastomer protective layer and adding the polyurea elastomer protective layer. Under the condition of a fragment impact speed of 200 m / s, the simulation of adding the polyurea elastomer protective layer, the cylinder body does not occur penetration damage and leakage and explosion, the polyurea elastomer protective layer is penetrated, but the surface of the carbon fiber winding layer only appears indentation and does not appear crack, as shown in FIG. 6; while the comparative sample (type III hydrogen storage cylinder without polyurea elastomer protective layer) appears surface crack and fiber layer peeling under the same condition, the cylinder body finally explodes and gas leaks, as shown in FIG. 7. Figure 3 Figure 4

[0037] Although the content of the present application has been described in detail by the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present application. After reading the above content, various modifications and alternatives of the present application will be obvious to those skilled in the art. Therefore, the protection scope of the present application should be defined by the appended claims.​​

Claims

1. An explosion-proof hydrogen storage cylinder under high-speed impact conditions, characterized in that: It includes an aluminum alloy inner liner, a carbon fiber winding layer, and a polyurea elastomer protective layer distributed from the inside out; the carbon fiber winding layer is fixed on the outside of the aluminum alloy inner liner, and the polyurea elastomer protective layer and the carbon fiber winding layer form a tight covering structure.

2. The explosion-proof hydrogen storage cylinder under high-speed impact conditions according to claim 1, characterized in that: The polyurea elastomer protective layer is 5mm thick, the aluminum alloy inner liner is 2.5mm thick, and the carbon fiber winding layer is 7.5mm thick.

3. The explosion-proof hydrogen storage cylinder under high-speed impact conditions according to claim 1, characterized in that: The inner liner is made of 6061-T6 aluminum alloy, the carbon fiber winding layer is made of T700 carbon fiber, and the polyurea elastomer protective layer is made of pure polyurea.

4. The explosion-proof hydrogen storage cylinder under high-speed impact conditions according to claim 1, characterized in that: The polyurea elastomer protective layer extends and completely covers the root area of ​​the bottle neck valve seat.

5. The explosion-proof hydrogen storage cylinder under high-speed impact conditions according to claim 1, characterized in that: The polyurea elastomer protective layer is installed in a set.

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