Vehicle-mounted hydrogen storage device and vehicle

Abstract

The present disclosure relates to a vehicle-mounted hydrogen storage device and a vehicle, the vehicle-mounted hydrogen storage device comprising: a hydrogen storage bottle; a partition plate arranged in the hydrogen storage bottle to divide a storage space and a pressurization space; a liquid storage tank arranged in the pressurization space and sealed; a first communication pipe, one end of which is in communication with the bottom of the liquid storage tank, and the other end of which is in communication with a liquid phase space in the storage space; a second communication pipe, one end of which is in communication with the top of the liquid storage tank, and the other end of which is in communication with a gas phase space in the storage space; and a first heating device arranged in the pressurization space and extending into the liquid storage tank. The present disclosure separates the medium in the bottle, separately sets the liquid storage tank for the pressurization part, avoids the large-area influence on the temperature of the medium in the bottle in the pressurization heat exchange process, and prevents the negative influence on the liquid hydrogen storage after the system stops.

Description

Technical Field

[0001] This disclosure relates to the field of on-board hydrogen storage technology, specifically to an on-board hydrogen storage device and vehicle. Background Technology

[0002] Liquid hydrogen is stored in onboard liquid hydrogen tanks. Due to the ultra-low boiling point and ultra-low critical point of liquid hydrogen, the design pressure of the onboard liquid hydrogen tanks cannot be too high. However, the gas supply pressure of high-power fuel cell stacks is currently relatively high. During the continuous gas supply process of the onboard liquid hydrogen tanks, the pressure inside the tanks will gradually decrease as the liquid level decreases and the gas phase space increases. When the pressure difference between the inside and outside of the onboard liquid hydrogen tanks is too small, liquid hydrogen cannot be output normally. Utility Model Content

[0003] The purpose of this disclosure is to provide an on-board hydrogen storage device and vehicle that can solve the aforementioned technical problems.

[0004] To achieve the above objectives, this disclosure provides an on-board hydrogen storage device, comprising: a hydrogen storage cylinder; a partition disposed within the hydrogen storage cylinder to separate a storage space and a pressurization space; a liquid storage tank disposed within the pressurization space and sealed therein; a first connecting pipe, one end of which is connected to the bottom of the liquid storage tank and the other end of which is connected to the liquid phase space within the storage space; a second connecting pipe, one end of which is connected to the top of the liquid storage tank and the other end of which is connected to the gas phase space within the storage space; and a first heating device disposed within the pressurization space and extending into the liquid storage tank.

[0005] Optionally, the hydrogen storage cylinder is constructed as a horizontal gas cylinder, the pressurization space is located at the end of the horizontal gas cylinder, and the volume of the pressurization space is smaller than the volume of the storage space.

[0006] Optionally, the on-board hydrogen storage device further includes a mounting bracket, the end of the hydrogen storage cylinder is constructed as an arc surface, the mounting bracket is disposed at the end point of the arc surface, and the first heating device is connected to the side wall of the hydrogen storage cylinder through the mounting bracket.

[0007] Optionally, the liquid storage tank is located at the bottom of the pressurization space.

[0008] Optionally, the highest point of the liquid storage tank is located below the mounting bracket.

[0009] Optionally, the first heating device is configured as a heating tube.

[0010] Optionally, the heating tube is configured as a heating coil.

[0011] Another object of this disclosure is to provide a vehicle including the aforementioned on-board hydrogen storage device.

[0012] Optionally, the vehicle further includes a second heating device disposed outside the hydrogen storage tank. The first heating device is constructed as a heating tube, the inlet of which extends outside the hydrogen storage tank and is connected to the second heating device. The other end of the second heating device is connected to the liquid phase space.

[0013] Optionally, the outlet of the heating tube extends beyond the hydrogen storage cylinder and connects to the battery stack.

[0014] The above technical solution involves storing liquid hydrogen in a hydrogen storage cylinder. A partition separates the liquid hydrogen from the pressurization space. The pressurization space contains a storage tank. Liquid hydrogen enters the storage tank through a first connecting pipe. A first heating device extends into the storage tank and is immersed in the liquid hydrogen to heat it, causing it to vaporize. The vaporized hydrogen then enters the gas phase space through a second connecting pipe, increasing the pressure within the storage space to stabilize the output of hydrogen. By separating the medium inside the cylinder and providing a separate storage tank for the pressurization section, the large-scale impact on the temperature of the medium inside the cylinder during the pressurization and heat exchange process is avoided, preventing negative impacts on the storage of liquid hydrogen after system shutdown.

[0015] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the internal structure of the on-board hydrogen storage device disclosed herein; Figure 2 This is a cross-sectional view of the on-board hydrogen storage device disclosed herein; Figure 3 This is a system connection diagram of the on-board hydrogen storage device in this disclosure.

[0017] Explanation of reference numerals in the attached figures 1. Partition; 2. Liquid storage tank; 3. First heating device; 4. First connecting pipe; 5. Second connecting pipe; 6. Mounting frame; 7. Hydrogen storage bottle; 8. Storage space; 81. Gas phase space; 82. Liquid phase space; 9. Pressurization space; 10. Second heating device; 11. Battery stack; 12. Thickened plate. Detailed Implementation

[0018] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0019] In this disclosure, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" generally refer to the upper, lower, top, and bottom of the corresponding component in the direction of gravity when in use, while "inner" and "outer" refer to the inner and outer contours relative to the component or structure itself. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not indicate sequence or importance. Additionally, in the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same element.

[0020] like Figure 1-2 As shown, this disclosure provides an on-board hydrogen storage device, including: a hydrogen storage cylinder 7; a partition 1 disposed within the hydrogen storage cylinder 7 to separate a storage space 8 and a pressurization space 9; a liquid storage tank 2 disposed within the pressurization space 9 and sealed; a first connecting pipe 4, one end of which is connected to the bottom of the liquid storage tank 2 and the other end of which is connected to the liquid phase space 82 within the storage space 8; a second connecting pipe 5, one end of which is connected to the top of the liquid storage tank 2 and the other end of which is connected to the gas phase space 81 within the storage space 8; and a first heating device 3 disposed within the pressurization space 9 and extending into the liquid storage tank 2.

[0021] Through the above technical solution, the hydrogen storage cylinder 7 stores liquid hydrogen. The partition 1 separates the liquid hydrogen from the pressurization space 9. The pressurization space 9 is equipped with a liquid storage tank 2. Liquid hydrogen enters the liquid storage tank 2 through the first connecting pipe 4. The first heating device 3 extends into the liquid storage tank 2 and is immersed in the liquid hydrogen to heat the liquid hydrogen, causing the liquid hydrogen to vaporize. The vaporized hydrogen enters the gas phase space 81 through the second connecting pipe 5, increasing the pressure in the storage space 8 to stabilize the output of hydrogen. The first connecting pipe 4 and the second connecting pipe 5 can balance the pressure between the liquid storage tank 2 and the liquid phase space 82. Liquid hydrogen in the liquid phase space 82 continuously enters the liquid storage tank 2, so that the liquid storage tank 2 always contains heatable liquid hydrogen. By separating the medium inside the cylinder and setting up a separate liquid storage tank 2 for the pressurization part, the large-area impact on the temperature of the medium inside the cylinder during the pressurization heat exchange process is avoided, and negative impacts on the liquid hydrogen storage after the system is shut down are prevented. One side of the liquid storage tank 2 is fitted to the bottle body, specifically the curved surface at the end of the hydrogen storage tank 7. Because the bottle body is in contact with the liquid hydrogen, the temperature is low and stable. On one hand, the low-temperature environment of the bottle body helps maintain the low-temperature state of the liquid hydrogen in the storage tank 2, reducing the loss from spontaneous vaporization of the liquid hydrogen. On the other hand, when the first heating device 3 inputs heat, it also allows for a more concentrated heat exchange between the liquid hydrogen and the hydrogen gas, improving heat exchange efficiency and further accelerating the boost response speed. The design of the liquid storage tank 2 can meet the balance between power demand (boost) and energy storage demand (liquid storage) in vehicle scenarios. In contrast, if the liquid storage tank 2 is not fitted to the bottle body, the contact area with the gas phase in the boost space 9 is larger, and the effect of maintaining the low-temperature state of the liquid hydrogen in the storage tank 2 is not ideal when the liquid hydrogen needs to be stored at low temperatures.

[0022] As an optional implementation method, such as Figure 1-2As shown, the hydrogen storage cylinder 7 is constructed as a horizontal cylinder, with a pressurization space 9 located at the end of the horizontal cylinder. The volume of the pressurization space 9 is smaller than the volume of the storage space 8. This design is suitable for horizontal cylinders, isolating a smaller pressurization space 9 at the end of the horizontal cylinder to avoid affecting the storage volume of the hydrogen storage cylinder 7. Of course, in other embodiments, the hydrogen storage cylinder 7 can also be a vertical cylinder, with the pressurization space 9 located on the side of the vertical cylinder.

[0023] Optionally, the on-board hydrogen storage device also includes a mounting bracket 6. The end of the hydrogen storage cylinder 7 is constructed with an arc-shaped surface. The mounting bracket 6 is located at the endpoint of the arc-shaped surface. The first heating device 3 is connected to the side wall of the hydrogen storage cylinder 7 through the mounting bracket 6. The mounting bracket 6 is located at the endpoint of the arc-shaped surface, which is usually a critical location for structural stress. Placing the mounting point here allows the load to be transferred more directly to the supporting structure through the endpoint, reducing stress concentration in the middle area of ​​the arc-shaped surface and enhancing the stability of the overall structure. Moreover, the endpoint is a characteristic point of the arc-shaped surface, with a clear location, which facilitates precise positioning during installation and ensures that the relative position of the mounting bracket 6 and the arc-shaped surface meets the design requirements, avoiding the impact of positioning deviation on the performance. Installation operations at the endpoint have a relatively open space, which is convenient for construction personnel to operate, especially when installing bolts, brackets, and other components. It can reduce interference from other parts of the arc-shaped surface and improve installation efficiency.

[0024] Optionally, the storage tank 2 is located at the bottom of the pressurization space 9, so that even if the liquid level in the liquid phase space 82 is low, liquid hydrogen can still enter the storage tank 2. The bottom of the pressurization space 9 is provided with a thickened plate 12. One side of the thickened plate 12 is connected to the partition, and the other side is attached to the inner wall of the end of the hydrogen storage bottle 7. The thickened plate 12 is provided with an installation groove for installing the storage tank 2, which can simplify sealing and installation. The bottom of the partition 1 needs to be sealed to the interface of the first connecting pipe 4. After thickening, the sealing surface at the bottom is thicker, which improves the sealing reliability and also provides stable support to avoid sealing gaps caused by deformation under force during sealing.

[0025] Optionally, the highest point of the liquid storage tank 2 is located below the mounting bracket 6, meaning the height of the liquid storage tank 2 is relatively low and the amount of liquid hydrogen inside is relatively small. This allows for faster heating and also avoids large-area impact on the liquid hydrogen inside the hydrogen storage bottle 7 during the heating process.

[0026] As an optional implementation method, such as Figure 1-2 As shown, the first heating device 3 is constructed as a heating tube, through which a heating medium can be introduced to heat the liquid hydrogen in the storage tank 2. Of course, the first heating device 3 can also be other heating devices such as an electric heating wire.

[0027] Optionally, the heating tube is constructed as a heating coil, which can increase the contact area with liquid hydrogen, thereby improving heating efficiency.

[0028] Another objective of this disclosure is to provide a vehicle comprising: the aforementioned on-board hydrogen storage device, wherein by separating the medium inside the cylinder and separately providing a storage tank 2 for the pressurization section, the large-area impact on the temperature of the medium inside the cylinder during the pressurization heat exchange process is avoided, and negative impacts on the storage of liquid hydrogen after the system is shut down are prevented.

[0029] Optionally, such as Figure 3 As shown, the vehicle also includes a second heating device 10, which is located outside the hydrogen storage tank 7. For example, the second heating device 10 is a heat exchanger. The first heating device 3 is constructed as a heating tube. The inlet of the heating tube extends outside the hydrogen storage tank 7 and is connected to the second heating device 10. The other end of the second heating device 10 is connected to the liquid phase space 82. The liquid hydrogen in the liquid phase space 82 is vaporized after being heated by the second heating device 10. The vaporized hydrogen enters the heating tube and exchanges heat with the liquid hydrogen in the liquid storage tank 2. The vaporized hydrogen is used to heat the liquid hydrogen without the need to add other heating media.

[0030] Optionally, such as Figure 3 As shown, the outlet of the heating tube extends beyond the hydrogen storage cylinder 7 and connects to the battery stack 11. After heat exchange, the hydrogen gas flows out of the heating tube outlet and into the battery stack 11 to supply gas to the battery stack 11. The battery stack 11 consumes the hydrogen gas, creating a pressure difference between the inlet and outlet of the heating tube. No other power source is needed. Alternatively, other gas supply lines can be installed, allowing the liquid phase space 82 to be directly connected to the battery stack 11 via the second heating device 10, supplying gas to the battery stack 11 when pressurization is not required. The second heating device 10 can be a built-in heating device in the hydrogen supply system, providing temperature for the hydrogen supply. This disclosure utilizes its own built-in second heating device 10 to heat the liquid hydrogen, eliminating the need for additional heating devices. It uses vaporized hydrogen gas to heat the liquid hydrogen, eliminating the need for other heating media, thus saving cost and space.

[0031] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0032] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0033] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A vehicle-mounted hydrogen storage device, characterized in that, include: Hydrogen storage cylinders; A partition is installed inside the hydrogen storage cylinder to separate the storage space and the pressurization space; A liquid storage tank is disposed within the pressurized space and is sealed. The first connecting pipe has one end connected to the bottom of the liquid storage tank and the other end connected to the liquid phase space in the storage space. The second connecting pipe has one end connected to the top of the liquid storage tank and the other end connected to the gas phase space in the storage space. as well as A first heating device is disposed within the pressurized space and extends into the liquid storage tank.

2. The on-board hydrogen storage device according to claim 1, characterized in that, The hydrogen storage cylinder is constructed as a horizontal gas cylinder, and the pressurization space is located at the end of the horizontal gas cylinder, and the volume of the pressurization space is smaller than the volume of the storage space.

3. The on-board hydrogen storage device according to claim 2, characterized in that, The on-board hydrogen storage device also includes a mounting bracket. The end of the hydrogen storage cylinder is constructed as an arc-shaped surface. The mounting bracket is located at the end point of the arc-shaped surface. The first heating device is connected to the side wall of the hydrogen storage cylinder through the mounting bracket.

4. The on-board hydrogen storage device according to claim 3, characterized in that, The liquid storage tank is located at the bottom of the pressurization space.

5. The on-board hydrogen storage device according to claim 4, characterized in that, The highest point of the liquid storage tank is located below the mounting bracket.

6. The on-board hydrogen storage device according to claim 1, characterized in that, The first heating device is constructed as a heating tube.

7. The on-board hydrogen storage device according to claim 6, characterized in that, The heating element is constructed as a heating coil.

8. A vehicle, characterized in that, include: The on-board hydrogen storage device according to any one of claims 1-7.

9. The vehicle according to claim 8, characterized in that, The vehicle also includes a second heating device disposed outside the hydrogen storage tank. The first heating device is constructed as a heating tube, the inlet of which extends outside the hydrogen storage tank and is connected to the second heating device. The other end of the second heating device is connected to the liquid phase space.

10. The vehicle according to claim 9, characterized in that, The outlet of the heating tube extends beyond the hydrogen storage cylinder and connects to the battery stack.

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