Device for adjusting temperature in vehicle-mounted liquid hydrogen storage tank
By designing a double-layer suspension structure and thermal insulation layer in the liquid hydrogen storage tank, the thermal expansion and contraction effect is used to automatically adjust the contact state between the inner vessel and the shell, the problem of high hydrogen supply and high heat leakage in the liquid hydrogen storage tank is solved, and low energy consumption and high thermal insulation performance is achieved.
Patent Information
- Application Number
- CN202422612540.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-10-29
AI Technical Summary
In the prior art, the hydrogen supply method of the liquid hydrogen storage tank has high energy consumption and many heat leakage points, and the liquid hydrogen pump has a short life, which cannot meet the requirements of hydrogen use devices.
A temperature regulation device in the vehicle-mounted liquid hydrogen storage tank is designed, adopting a double-layer barrel-shaped suspension structure, the length of the inner layer is larger than that of the outer layer, and the inner layer forms a folded edge. The inner liner and the outer shell are connected by suspension, and an insulating layer is set between the suspension. Using the thermal expansion and contraction effect of metal, the contact state between the inner liner and the outer shell is automatically adjusted to control heat transfer.
It realizes automatic adjustment of the temperature in the hydrogen storage tank under different temperature conditions, reduces heat leakage, reduces energy consumption, and improves the thermal insulation performance of the hydrogen storage tank.
Smart Images
Figure CN223216110U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of liquid storage tanks, and in particular to a device for regulating the temperature in a vehicle-mounted liquid hydrogen storage tank. Background Art
[0002] Liquid hydrogen storage has the advantages of high hydrogen storage density, low operating pressure, low hydrogen storage tank production cost, and safe operation. It is one of the main development directions for the application of hydrogen energy in the transportation field in the future. The supply pressure of hydrogen directly affects the power and economy of hydrogen-using fuel cells or hydrogen internal combustion engines. The commonly used hydrogen supply method is to use electric heating or introduce other heat sources (such as coolant, heated gaseous hydrogen) into the tank to evaporate the liquid hydrogen in the tank and then increase the pressure in the tank to drive the gaseous or liquid hydrogen out of the tank. However, this method has low hydrogen supply pressure, high power consumption, and many hot spots in the insulated storage tank, which cannot fully meet the requirements of hydrogen-using devices. Another method is to use a liquid hydrogen pump to pump the liquid hydrogen out of the tank, but the life of the liquid hydrogen pump is short and cannot meet the needs of mass production. Utility Model Content
[0003] In order to solve the above problems, the utility model provides a device for regulating the temperature inside a vehicle-mounted liquid hydrogen storage tank.
[0004] The technical solution of the utility model is as follows: a device for regulating the temperature inside a vehicle-mounted liquid hydrogen storage tank, wherein the regulating device is located at the movable end of the inner liner of the hydrogen storage tank, and the suspension in the regulating device is a double-layer barrel-shaped structure, the outer layer of the suspension is connected to the inner liner, the length of the inner layer of the suspension is greater than the length of the outer layer, and the inner layer of the suspension extends outward to form a folded edge, and a support plate and a support seat are connected to the outer shell of the hydrogen storage tank in sequence, and the support seat is in contact with the outer side of the inner layer of the suspension through an insulating ring.
[0005] In the above-mentioned device for regulating the temperature inside a vehicle-mounted liquid hydrogen storage tank, the fixed end of the hydrogen storage tank liner is fixed to the outer shell through hydrogenation and dehydrogenation pipelines.
[0006] In the above-mentioned device for regulating the temperature inside a vehicle-mounted liquid hydrogen storage tank, an insulating layer is provided between the suspended inner layers, and the insulating layer is perpendicular to the inner layer.
[0007] In the above-mentioned device for regulating the temperature inside a vehicle-mounted liquid hydrogen storage tank, the support plate, support seat and suspension are all made of metal.
[0008] The liquid hydrogen bottle has a double-layer vacuum insulation structure. In the present invention, the inner liner and the outer shell are connected by a suspension. The suspension is a single-sided planed U-shaped structure, which is divided into an inner layer and an outer layer. The heat needs to pass through the inner and outer layers of the suspension and then be transferred to the inner liner. The heat transfer path is long, which reduces heat transfer. The outer layer of the suspension is welded to the inner liner, and the inner layer is supported by the support seat through an insulating ring. The inner liner of the liquid hydrogen bottle moves under the action of thermal expansion and contraction. Since the right end is restricted by the hydrogenation and dehydrogenation pipelines, the movement is reflected at the left end (the movable end of the inner liner). When the temperature of the inner liner is low, the inner liner drives the suspension to move to the right (contract), and when the temperature of the inner liner is high, the inner liner drives the suspension to move to the left (expand).
[0009] Beneficial effects of the utility model
[0010] The utility model utilizes the thermal expansion and contraction deformation of metal to make the inner liner of the storage tank contact with the outer shell when the temperature is high, thereby introducing ambient heat into the inner liner. When the temperature is low, the inner liner breaks contact with the outer shell, automatically cutting off the heat conduction path, thereby ensuring the thermal insulation performance of the storage tank. When the whole vehicle is running, the fuel cell consumes hydrogen, the temperature inside the bottle drops, and an external heat source is required. At this time, the inner liner vibrates with the whole vehicle, increasing the frequency of contact with the outer shell, thereby introducing ambient heat into the inner liner through the outer shell. When the vehicle is stationary, the fuel cell stops consuming hydrogen, and the temperature inside the tank rises. At this time, the inner liner will break away from the outer shell, cutting off the heat conduction path, thereby ensuring the thermal insulation performance of the storage tank. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic diagram of the structure of a vehicle-mounted liquid hydrogen storage tank with a regulating device.
[0012] Figure 2 for Figure 1 Schematic diagram of the structure of the regulating device.
[0013] Figure 3 It is a structural diagram of the adjustment device when the suspension moves to the left.
[0014] Figure 4 for Figure 3 Enlarged view of part A.
[0015] Figure 5 It is a structural diagram of the adjustment device when the suspension moves to the right.
[0016] Figure 6 for Figure 5 Enlarged view of part A.
[0017] Figure 7 This is a schematic diagram of the structure of the adjustment device when the inner tank vibrates.
[0018] Figure 8 for Figure 7 Enlarged view of part A.
[0019] The markings in the figure are: 1 outer shell; 2 support plate; 3 inner liner; 4 insulation ring; 5 support seat; 6 insulation layer; 7 suspension; 7-1 outer layer; 7-2 inner layer; 7-3 folded edge; 8 hydrogenation and dehydrogenation pipelines. DETAILED DESCRIPTION
[0020] Example 1
[0021] like Figure 1 、 Figure 2 As shown, a device for regulating the temperature inside a vehicle-mounted liquid hydrogen storage tank, wherein the fixed end of the hydrogen tank liner is fixed to the outer shell 1 via a hydrogenation and dehydrogenation pipeline 8. The regulating device is located at the movable end of the hydrogen tank liner, and the suspension 7 in the regulating device is a double-layer barrel-shaped structure, wherein the outer layer 7-1 of the suspension 7 is connected to the inner shell 3, the length of the inner layer 7-2 of the suspension 7 is greater than the length of the outer layer 7-1, and the inner layer 7-2 of the suspension 7 extends outward to form a folded edge, and an insulating layer 6 is provided between the inner layers 7-2 of the suspension 7, and the insulating layer 6 is perpendicular to the inner layer 7-2. The hydrogen tank outer shell 1 is sequentially connected with a support plate 2 and a support seat 5, and the support seat 5 is in contact with the outer side of the inner layer 7-2 of the suspension 7 via an insulating ring 4. The support plate 2, the support seat 5, and the suspension 7 are all made of metal.
[0022] like Figure 3 、 Figure 4 As shown, during use, when the temperature of the liquid hydrogen inside the tank exceeds a set value, the fixed end of the hydrogen tank's inner tank is secured to the outer shell 1 via hydrogenation and degassing lines 8. Due to thermal expansion and contraction, the tank's inner tank shifts leftward, driving the suspension 7 leftward. A gap forms between the support base 5 and the folded edge 7-3 of the suspension 7, and heat conduction is blocked by the insulating ring 4. This minimizes heat leakage from the liquid hydrogen tank and ensures a maximum liquid hydrogen dormancy period.
[0023] like Figure 5 、 Figure 6 As shown, when the temperature of the liquid hydrogen inside the tank falls below a set value, the movable end of the tank moves rightward, driving the suspension 7 rightward. This eliminates the gap between the support base 5 and the folded edge 7-3 of the suspension 7, allowing heat to flow across the insulation ring. Heat is then transferred directly from the support base 5 to the suspension 7 and then to the tank, causing the liquid hydrogen to evaporate and increasing the pressure inside the tank.
[0024] like Figure 7 、 Figure 8 As shown, when the vehicle is running, the inner liner of the hydrogen storage tank will vibrate, causing the outer layer 7-1 of the suspension 7 to contact the support seat 5. The heat will pass through the suspension 7 and the insulation ring 4, and be introduced into the inner liner through the support plate 2, increasing the pressure inside the hydrogen storage tank and driving the hydrogen in the hydrogen storage tank out of the liquid hydrogen tank.
[0025] The utility model can automatically adjust the temperature inside the tank according to the temperature inside the tank and the actual conditions of the vehicle, without the need for additional control. It has low energy consumption, few leakage hot spots, and a simple structure.
Claims
1. A device for regulating the temperature inside a vehicle-mounted liquid hydrogen storage tank, characterized in that: The regulating device is located at the movable end of the inner liner of the hydrogen storage tank. The suspension (7) in the regulating device is a double-layer barrel structure. The outer layer (7-1) of the suspension (7) is connected to the inner liner (3). The length of the inner layer (7-2) of the suspension (7) is greater than the length of the outer layer (7-1). The inner layer (7-2) of the suspension (7) extends outward to form a folded edge. The outer shell (1) of the hydrogen storage tank is sequentially connected with a support plate (2) and a support seat (5). The support seat (5) contacts the outer side of the inner layer (7-2) of the suspension (7) through an insulating ring (4).
2. The device for regulating the temperature in a vehicle-mounted liquid hydrogen storage tank according to claim 1, characterized in that: The fixed end of the inner liner of the hydrogen storage tank is fixed to the outer shell (1) through a hydrogenation and dehydrogenation pipeline (8).
3. The device for regulating the temperature in a vehicle-mounted liquid hydrogen storage tank according to claim 1, characterized in that: A heat insulating layer (6) is provided between the inner layers (7-2) of the suspension (7), and the heat insulating layer (6) is perpendicular to the inner layer (7-2).
4. The device for regulating the temperature in a vehicle-mounted liquid hydrogen storage tank according to claim 1, characterized in that: The support plate (2), the support seat (5) and the suspension (7) are all made of metal.