A pipeline system for a vehicle-mounted hydrogen supply system

Abstract

The present invention relates to a pipeline system of a vehicle-mounted hydrogen supply system, including a hydrogen filling module, a hydrogen storage module, and a hydrogen supply module, wherein the hydrogen filling module is connected to the hydrogen storage module through a hydrogen pipeline, the hydrogen storage module is connected to the hydrogen supply module through a hydrogen pipeline, the hydrogen supply module is connected to a fuel cell, and the hydrogen storage module includes a hydrogen storage bottle and a bottle valve assembly; the bottle valve assembly includes a bottle valve installed on the bottle mouth of the hydrogen storage bottle, and a first one-way valve, a stop valve, and a relief valve integrated on the bottle valve and connected in series in sequence between the bottle valve and the bottle mouth of the hydrogen storage bottle, the first one-way valve is connected in parallel to a solenoid valve; the bottle valve is provided with an air inlet and an air outlet to realize the series connection of several hydrogen storage bottles. Compared with the prior art, the present invention has the advantages of safety and reliability, simple process, low cost, and few leakage points.

Description

Technical Field

[0001] The present invention relates to the field of structural optimization of a vehicle-mounted hydrogen supply system, and in particular to a pipeline system of a vehicle-mounted hydrogen supply system. Background Art

[0002] Hydrogen fuel cell vehicles have entered a rapid development stage in recent years. As the hydrogen storage and supply system of hydrogen fuel cell vehicles, the design of the pipeline of the on-board hydrogen supply system is one of the keys to ensure the safe and reliable driving of hydrogen fuel vehicles. Considering that hydrogen is very small in volume and easy to leak, every connection point of the pipeline on the on-board hydrogen supply system, whether it is a ferrule connection or a threaded connection, has the risk of leakage, especially some high-pressure pipelines may have installation stress due to the layout environment. Under the long-term vibration of the vehicle, the connection point between the pipeline and the valve is very likely to leak. Therefore, reducing the pipeline connection points as much as possible is conducive to simplifying the pipeline and further improving the safety performance of the on-board hydrogen supply system; at the same time, the current on-board hydrogen supply system also generally has problems such as high production cost and complex pipeline process.

[0003] Chinese patent CN208703568U discloses a serially connected on-board hydrogen supply system, which involves the field of structural optimization of on-board hydrogen supply systems, including a hydrogen bottle group, a hydrogen filling port, a hydrogen supply device, a connecting pipeline and a fixed frame. The mouth of the hydrogen bottle is equipped with a bottle mouth valve, and the bottle mouth valve is provided with an air inlet and an air outlet to achieve the series connection of multiple hydrogen bottles. However, the valve assembly in the patent that cooperates with the bottle valve to complete the hydrogen flow control needs to be installed additionally, which increases the connection points, resulting in more possible leakage points and increasing the installation cost; and, only one of the two outlets of the bottle valve of the device is installed with an overflow valve, and the pipeline of the other outlet cannot play an effective overflow role when the pipeline ruptures under extreme conditions, which has certain safety hazards, and there are still too many connection points between the valve parts in the system of the patented technology, which is not conducive to reducing costs and further improving the safety of the hydrogen system. Summary of the invention

[0004] The purpose of the present invention is to provide a vehicle-mounted hydrogen supply system pipeline system in order to overcome the defects of the above-mentioned prior art.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A pipeline system of an on-vehicle hydrogen supply system includes a hydrogen filling module, a hydrogen storage module, and a hydrogen supply module. The hydrogen filling module is connected to the hydrogen storage module through a hydrogen pipeline, the hydrogen storage module is connected to the hydrogen supply module through a hydrogen pipeline, the hydrogen supply module is connected to a fuel cell, and the hydrogen storage module includes a hydrogen storage bottle and a bottle valve assembly; the bottle valve assembly includes a bottle valve installed on the bottle mouth of the hydrogen storage bottle, and an overflow valve, a stop valve and a first one-way valve integrated on the bottle valve and connected in series in sequence between the bottle valve and the bottle mouth of the hydrogen storage bottle, the first one-way valve is connected in parallel with a solenoid valve; the bottle valve is provided with an air inlet and an air outlet to realize the series connection of several hydrogen storage modules.

[0007] Compared with the general on-board hydrogen supply system, there are a large number of tees on the pipeline, and the more gas cylinders there are in the on-board hydrogen supply system, the more tees there are. In the system pipeline layout scheme of the present invention, the pipeline directly connects the valve components in series, and the hydrogen flows from the hydrogen filling nozzle through the one-way valve, the first bottle valve, the second bottle valve, the third bottle valve, the filter, the first-level pressure reducing valve to the battery reactor in sequence. There is no tee or multi-way in the entire hydrogen flow path. On the one hand, the possible leakage connection points of the pipeline are minimized to the maximum extent, and the safety of the on-board hydrogen supply system is improved. On the other hand, the pipeline is simplified and the valve components, such as the pressure gauge, the filter of the filling module, etc., are reduced while ensuring that the functionality and safety of the on-board hydrogen supply system still meet the requirements, which is convenient for pipeline manufacturing and installation and cost control.

[0008] The bottle valve of the bottle valve assembly is also integrated with a first over-temperature safety valve; the tail valve of the hydrogen storage bottle is connected to a second over-temperature safety valve.

[0009] The vents of the first over-temperature safety valve and the second over-temperature safety valve are both connected to a discharge protector.

[0010] A pressure sensor interface is provided on the bottle valve of the bottle valve assembly directly connected to the hydrogen filling module, and the pressure sensor interface is connected to the high-pressure pressure sensor.

[0011] In the hydrogen storage module of the present invention, two hydrogen inlet and outlet interfaces and a pressure sensor interface are provided on the bottle valve, and valve components such as a one-way valve, a stop valve, a solenoid valve, a relief valve, a temperature sensor, and a TPRD (over-temperature safety valve) are integrated; since the bottle valve also integrates the relief valve, the present pipeline layout scheme can make full use of the two interfaces of the bottle valve to replace the tee and realize the series connection between the bottle valves; TPRD (over-temperature safety valve) is designed at the bottle mouth and the tail valve of the hydrogen storage bottle respectively, and the venting ports of the TPRD (over-temperature safety valve) are connected with a discharge protector, which greatly simplifies the venting pipeline system and reduces the difficulty of pipeline manufacturing and installation as well as the material cost.

[0012] The hydrogen filling module comprises a filling nozzle fixed on a filling panel and a one-way valve connected in series with the filling nozzle.

[0013] The hydrogen filling module can fill the gas cylinder efficiently and stably. In the filling module, the filling nozzle is fixed on the filling panel to ensure the operational stability during filling. A one-way valve is arranged at the rear end of the filling nozzle to prevent the gas in the hydrogen storage bottle from leaking out if the filling nozzle is damaged, thereby increasing the service life of the filling nozzle.

[0014] The hydrogen supply module comprises a filter connected to the hydrogen storage module and a first-stage pressure reducing valve assembly connected in series with the filter, and the first-stage pressure reducing valve assembly is connected to the fuel cell through a metal hose.

[0015] The first-stage pressure reducing valve assembly comprises a pressure reducing valve, and the pressure reducing valve is provided with a first outlet and a second outlet, wherein the first outlet is connected to a manual discharge valve, and the second outlet is connected to the metal hose.

[0016] The pressure reducing valve has an integrated unloading valve inside, and the outlet of the unloading valve is connected to a discharge protector; the pressure reducing valve has an integrated pressure sensor interface, which is connected to a medium pressure sensor.

[0017] In the hydrogen supply module of the present invention, the first-stage pressure reducing valve is provided with two outlets, which can further reduce the number of tees and adapters in the pipeline and reduce possible leakage points; the first-stage pressure reducing valve integrates functions such as an unloading valve and a pressure sensor interface to prevent the three-way valve used to install valve components from appearing on the pipeline; a filter is provided in front of the pressure reducing valve to effectively prevent the pressure reducing valve and its rear-end components from being contaminated by impurities, thereby ensuring the purity of the hydrogen entering the battery stack. An outlet after the pressure reducing valve is connected to a venting hand valve, which is used to vent the pipeline during maintenance, and a special matching wrench is required to twist the hand valve, which can prevent others from accidentally twisting the hand valve. Another outlet after the pressure reducing valve is directly connected to the battery stack, and the last section adopts a metal hose transition to improve the seismic resistance of the pipeline system and facilitate the installation of the pipeline.

[0018] The series pipelines between the hydrogen storage bottles are provided with bends. The pipeline bend design between the bottle valves improves its anti-seismic performance.

[0019] The pipeline system of the vehicle-mounted hydrogen supply system is installed in an environment that maintains airflow with the outside world. Since there is a hydrogen discharge port in the system of the present invention, the system of the present invention is suitable for the case where the vehicle-mounted hydrogen supply system is in an open environment that can maintain gas flow with the outside world, such as installing the vehicle-mounted hydrogen supply system on the top of a car compartment.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] (1) The pipeline layout scheme of the vehicle-mounted hydrogen supply system is simple and clear, and there is no three-way or multi-way joint, which greatly simplifies the hydrogen supply pipeline and the venting pipeline. On the basis of effectively ensuring the hydrogen supply demand of fuel cell vehicles under various working conditions, it further improves its safety performance, reduces production costs, and is more convenient for pipeline installation and production, and is suitable for most fuel cell vehicles;

[0022] (2) The system is equipped with components such as one-way valves, stop valves, solenoid valves, and overflow valves to form a hydrogen storage and supply control system, which enables efficient and safe supply of hydrogen, and the hydrogen flow is easy to control, thereby improving the safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] In the figure, 1 is a hydrogen filling module, 11 is a filling nozzle, 12 is a second one-way valve, 2 is a hydrogen storage module, 21 is a hydrogen storage bottle, 22 is a bottle valve assembly, 221 is a high-pressure pressure sensor, 222 is a first one-way valve, 223 is a stop valve, 224 is a relief valve, 225 is a solenoid valve, 226 is a first over-temperature safety valve, 23 is a second over-temperature safety valve, 24 is a first discharge protector, 25 is a second discharge protector, 3 is a hydrogen supply module, 31 is a filter, 32 is a first-level pressure reducing valve assembly, 321 is a pressure reducing valve, 322 is a medium-pressure pressure sensor, 323 is an unloading valve, 33 is a manual discharge valve, 34 is a third discharge protector, 35 is a metal hose, N1 is a hydrogen inlet, N2 is a venting port, and N3 is a fuel cell port. DETAILED DESCRIPTION

[0025] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0026] Example

[0027] A vehicle-mounted hydrogen supply system pipeline system, such as Figure 1 As shown, it includes a hydrogen filling module 1, a hydrogen storage module 2, and a hydrogen supply module 3. The hydrogen filling module 1 is connected to the hydrogen storage module 2 through a hydrogen pipeline, the hydrogen storage module 2 is connected to the hydrogen supply module 3 through a hydrogen pipeline, and the hydrogen supply module 3 is connected to the fuel cell.

[0028] The hydrogen filling module 1 includes a gas filling nozzle 11 fixed on the filling panel and a second one-way valve 12 connected in series with the gas filling nozzle 11. The gas filling nozzle 11 is connected to the hydrogen inlet N1 and is fixed on the filling panel to ensure operational stability during filling. A second one-way valve 12 is arranged at the rear end of the gas filling nozzle 11 to prevent gas leakage when the gas filling nozzle is damaged and to increase the service life of the gas receiving head. The hydrogen filling module 1 in this embodiment can fill the gas cylinder efficiently and stably.

[0029] The hydrogen storage module 2 includes a hydrogen storage bottle 21 and a bottle valve assembly 22; Figure 1 As shown in the structure in the dotted frame, the bottle valve assembly 22 includes a bottle valve installed at the bottle mouth of the hydrogen storage bottle 21, and a first one-way valve 222, a stop valve 223 and a relief valve 224 integrated on the bottle valve and connected in series in sequence between the bottle valve and the bottle mouth of the hydrogen storage bottle 21, and the first one-way valve 222 is connected in parallel with the solenoid valve 225; the bottle valve also integrates a first over-temperature safety valve 226 (TPRD), which is connected to the bottle mouth of the hydrogen storage bottle 21; the tail valve of the hydrogen storage bottle 21 is connected to the second over-temperature safety valve 23 (TPRD); the vents of the first over-temperature safety valve 226 (TPRD) and the second over-temperature safety valve 23 (TPRD) are respectively connected to the first discharge protector 24 and the second discharge protector 25; the bottle valve of this embodiment is provided with an air inlet and an air outlet to realize the series connection of several hydrogen storage modules 2. A pressure sensor interface is provided on the bottle valve of the bottle valve assembly 22 directly connected to the hydrogen filling module 1 , and the pressure sensor interface is connected to the high-pressure pressure sensor 221 .

[0030] In the hydrogen storage module 2, the bottle valve integrates valve components such as a one-way valve, a stop valve, a solenoid valve, a relief valve, a temperature sensor, and a TPRD over-temperature safety valve, and is provided with two hydrogen inlet and outlet interfaces and a pressure sensor interface. Since the bottle valve also integrates the relief valve, this pipeline layout scheme can make full use of the two interfaces of the bottle valve to replace the three-way valve and realize the series connection between the bottle valves. In this pipeline layout scheme, the TPRD vent ports of the bottle valve and the tail valve of the gas cylinder are connected by a discharge protector, which greatly simplifies the venting pipeline system and reduces the difficulty of pipeline manufacturing and installation and material costs. However, this scheme is only applicable to the case where the on-board hydrogen supply system is in an open environment where gas can always flow with the outside world, such as installing the on-board hydrogen supply system on the top of a car compartment.

[0031] The hydrogen supply module 3 includes a filter 31 connected to the hydrogen storage module 2, and a first-level pressure reducing valve assembly 32 connected in series to the filter 31, and the first-level pressure reducing valve assembly 32 is connected to the fuel cell through a metal hose 35; wherein the first-level pressure reducing valve assembly 32 includes a pressure reducing valve 321, and the pressure reducing valve 321 is provided with a first outlet and a second outlet, the first outlet is connected to a manual discharge valve 33, the outlet of the manual discharge valve 33 is a vent N2, and the second outlet is connected to the metal hose 35; and, the pressure reducing valve 321 has an integrated unloading valve 323, and the outlet of the unloading valve 323 is connected to a discharge protector; the pressure reducing valve 321 is integrated with a pressure sensor interface, and the pressure sensor interface is connected to a medium pressure sensor 322.

[0032] In the hydrogen supply module 3, the pressure reducing valve in the first-stage pressure reducing valve assembly also integrates functions such as an unloading valve and a pressure sensor interface, and is provided with two outlets, which can further reduce the number of tees and adapters in the pipeline and reduce possible leaks; a filter is provided in front of the pressure reducing valve, which can effectively prevent the pressure reducing valve and its rear-end components from being contaminated by impurities, and ensure the purity of the hydrogen entering the fuel cell stack. An outlet after the pressure reducing valve is connected to a venting hand valve, which is used to vent the pipeline during maintenance, and a special matching wrench is required to twist the hand valve, which can prevent others from accidentally twisting the hand valve. The fuel cell port N3 after the pressure reducing valve is directly connected to the fuel cell stack, and the last section uses a metal hose 35 for transition, which improves the seismic resistance of the pipeline system and facilitates the installation of the pipeline.

[0033] In this embodiment, bends are provided on the series pipelines between the plurality of hydrogen storage bottles 21 to improve their anti-seismic performance.

[0034] The bottle valve and pressure reducing valve with integrated functions involved in the present invention can be purchased on the market. For example, the bottle valve can be exemplified by the HTV-35 series bottle valve of the Italian OMB company, and the pressure reducing valve can be exemplified by the M-H35 series pressure reducing valve of the Italian Metatron company.

[0035] Compared with the system in Chinese patent CN208703568U, the bottle valve selected in the system in this embodiment needs to have a built-in overflow valve, compared with the GFI bottle valve in the prior art CN208703568U which does not have an integrated overflow valve, and after the bottle valves in the prior art are connected in series, both outlets of each bottle valve are connected to the hydrogen pipeline, but the overflow valve is only installed at one of the outlets, and the other outlet is not installed with the overflow valve, resulting in that if the pipeline of the other outlet without the overflow valve installed is ruptured, it is impossible to effectively prevent the uncontrolled release of hydrogen, causing a safety hazard. In the prior art, the three-way valves of the overflow valve, unloading valve and connecting vent needle valve all need to be installed additionally, which not only increases the connection points but also increases the production cost. In addition, there are transition adapters in the connection between the pressure reducing valve and the unloading valve and the medium-pressure pressure sensor, which increases the leakage points. In the system of this embodiment, multiple functional parts are integrated into one valve part as much as possible to reduce the connection points and installation workload, including a built-in overflow valve in the bottle valve and a built-in unloading valve in the pressure reducing valve, and two outlets and a medium-pressure pressure sensor interface are also provided, one of which is connected to the battery stack and the other is connected to the vent valve. This design saves a three-way valve that is originally used to connect the vent valve. At the same time, the interface form of the pressure transmitter and the vent valve is consistent with the functional interface form of the pressure reducing valve, which avoids the existence of transition adapters to the greatest extent, and reduces the connection leakage points and installation costs as a whole. The system of this embodiment reduces some unnecessary valves, such as pressure gauges, filters of filling modules, etc., while ensuring the functionality and safety requirements of the on-board hydrogen supply system, thereby further reducing leakage points and production costs. In the system of this embodiment, the vent ports of the bottle valve, tail valve and unloading valve are emptied in the form of a discharge protector, which greatly simplifies the venting pipeline, reduces the cost and installation workload, and the venting hand valve requires a special wrench to operate, thereby avoiding misoperation by personnel and improving safety.

[0036] The pipeline arrangement scheme of the vehicle-mounted hydrogen supply system has a concise and clear pipeline flow, and there is no three-way or multi-way joint, which greatly simplifies the hydrogen supply pipeline and the venting pipeline. On the basis of being able to effectively ensure the hydrogen supply demand of fuel cell vehicles under various working conditions, it further improves its safety performance, reduces production costs, and is more convenient for pipeline installation and production, and is suitable for most fuel cell vehicles. In short, the system of this embodiment has the advantages of less leakage, less installation workload, low cost, and high safety.

[0037] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A pipeline system of a vehicle-mounted hydrogen supply system, comprising a hydrogen filling module (1), a hydrogen storage module (2), and a hydrogen supply module (3), wherein the hydrogen filling module (1) is connected to the hydrogen storage module (2) via a hydrogen pipeline, the hydrogen storage module (2) is connected to the hydrogen supply module (3) via a hydrogen pipeline, the hydrogen supply module (3) is connected to a fuel cell, and the hydrogen storage module (2) comprises a hydrogen storage bottle (21) and a bottle valve assembly (22); It is characterized in that The bottle valve assembly (22) comprises a bottle valve installed at the bottle mouth of the hydrogen storage bottle (21), and a first one-way valve (222), a stop valve (223) and an overflow valve (224) which are integrated on the bottle valve and connected in series in sequence between the bottle valve and the bottle mouth of the hydrogen storage bottle (21), wherein the first one-way valve (222) is connected in parallel to a solenoid valve (225); an air inlet and an air outlet are provided on the bottle valve to realize the series connection of a plurality of hydrogen storage modules (2).

2. The on-vehicle hydrogen supply system pipeline system according to claim 1, characterized in that: A first over-temperature safety valve (226) is also integrated on the bottle valve of the bottle valve assembly (22), and a second over-temperature safety valve (23) is connected to the tail valve of the hydrogen storage bottle (21).

3. The on-vehicle hydrogen supply system pipeline system according to claim 2, characterized in that: The vents of the first over-temperature safety valve (226) and the second over-temperature safety valve (23) are both connected to a discharge protector.

4. The on-vehicle hydrogen supply system pipeline system according to claim 1, characterized in that: A pressure sensor interface is provided on the bottle valve of the bottle valve assembly (22) directly connected to the hydrogen filling module (1), and the pressure sensor interface is connected to the high-pressure pressure sensor (221).

5. The on-vehicle hydrogen supply system pipeline system according to claim 1, characterized in that: The hydrogen filling module (1) comprises a filling nozzle (11) fixed on a filling panel and a second one-way valve (12) connected in series with the filling nozzle (11).

6. The on-vehicle hydrogen supply system pipeline system according to claim 1, characterized in that: The hydrogen supply module (3) comprises a filter (31) connected to the hydrogen storage module (2), and a first-stage pressure reducing valve assembly (32) connected in series with the filter (31); the first-stage pressure reducing valve assembly (32) is connected to the fuel cell via a metal hose (35).

7. The on-vehicle hydrogen supply system pipeline system according to claim 6, characterized in that: The first-stage pressure reducing valve assembly (32) comprises a pressure reducing valve (321), the pressure reducing valve (321) being provided with a first outlet and a second outlet, the first outlet being connected to a manual discharge valve (33), and the second outlet being connected to the metal hose (35).

8. The on-vehicle hydrogen supply system pipeline system according to claim 7, characterized in that: The pressure reducing valve (321) has an integrated unloading valve (323) inside, and the outlet of the unloading valve (323) is connected to a discharge protector; the pressure reducing valve (321) has an integrated pressure sensor interface, and the pressure sensor interface is connected to a medium pressure sensor (322).

9. The on-vehicle hydrogen supply system pipeline system according to claim 1, characterized in that: Bends are provided on the series pipelines arranged between the plurality of hydrogen storage bottles (21).

10. The on-vehicle hydrogen supply system pipeline system according to claim 1, characterized in that: The pipeline system of the vehicle-mounted hydrogen supply system is installed in an environment that maintains air flow with the outside world.

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