Hydrogen fuel cell system and vehicle

Abstract

The invention provides a hydrogen fuel cell system and a vehicle. The hydrogen fuel cell system comprises an electric pile assembly, a drainage assembly and a water collector, wherein the drainage assembly is arranged between the electric pile assembly and the water collector; the drainage assembly comprises a main drainage pipeline and an auxiliary drainage pipeline, and the main drainage pipeline and the auxiliary drainage pipeline are communicated with the water collector. According to the hydrogen fuel cell system provided by the invention, the water drainage assembly with the main water drainage pipeline and the auxiliary water drainage pipeline is arranged between the water collector and the electric pile assembly, so that water vapor condensation in the process of conveying water discharged by the electric pile assembly to the water collector can be prevented, and the water collector can also collect the water generated by the electric pile assembly for subsequent water reutilization.

Description

Technical Field

[0001] This application relates to the field of new energy vehicles, and particularly to a hydrogen fuel cell system and a vehicle. Background Art

[0002] With the continuous progress of new energy vehicle technology and the continuous development of the industry, new energy vehicles are gradually replacing fuel vehicles with their environmental protection and energy-saving advantages. Among them, hydrogen fuel cells, with their advantages of high efficiency, zero emissions, and low noise, have become an important tool for China's energy structure transformation, energy conservation and emission reduction, and automotive industry upgrading, and will become an important solution for the sustainable development of China's cities and economy. At the same time, the state and local governments have gradually introduced a series of policies to strongly support the development of hydrogen fuel cell vehicles, and major domestic vehicle manufacturers are also accelerating the strategic layout of hydrogen fuel cell vehicles.

[0003] Currently, the water vapor generated by the reaction of hydrogen fuel vehicles is often directly discharged outside the vehicle. If the water vapor is blocked during the discharge process or there is an ice blockage, it will not only affect the vehicle performance, but may also pose risks such as hydrogen accumulation in severe cases.

[0004] Therefore, it is necessary to provide a new type of hydrogen fuel cell system and vehicle to solve the above problems. Summary of the Invention

[0005] The purpose of this application is to provide a hydrogen fuel cell system and a vehicle that can prevent water vapor condensation.

[0006] This application provides a hydrogen fuel cell system, including: a stack assembly, a drainage assembly, and a water collector. The drainage assembly is arranged between the stack assembly and the water collector; the drainage assembly includes a main drainage pipeline and an auxiliary drainage pipeline, and the main drainage pipeline and the auxiliary drainage pipeline are respectively connected to the water collector.

[0007] Further, the main drainage pipeline is connected to the stack assembly, and the drainage assembly further includes an excess air discharge pipeline extending from the stack assembly, and the excess air discharge pipeline is connected to the main drainage pipeline.

[0008] Further, the drainage assembly further includes an excess hydrogen discharge pipeline extending from the stack assembly, and the excess hydrogen discharge pipeline is connected to the main drainage pipeline.

[0009] Further, the drainage assembly further includes a pressure relief hydrogen discharge pipeline extending from the stack assembly, and the pressure relief hydrogen discharge pipeline is connected to the main drainage pipeline.

[0010] Further, the drainage assembly further includes a purge gas discharge pipeline extending from the stack assembly, and the purge gas discharge pipeline is connected to the main drainage pipeline.

[0011] Further, the auxiliary drainage pipeline is connected to the stack assembly through a water-gas separation device. The water-gas separation device includes an air inlet, an air outlet, and a drainage outlet. The air inlet and the air outlet are respectively communicated with the stack assembly, and the drainage outlet is communicated with the auxiliary drainage pipeline.

[0012] Further, the water-gas separation device includes a water separator and an ejector which are communicated with each other; the water separator and the ejector are separately arranged; the exhaust port is arranged on the ejector; the air inlet and the drainage outlet are arranged on the water separator; the drainage assembly further includes a pressure relief hydrogen discharge pipeline extending from the ejector, and the pressure relief hydrogen discharge pipeline is communicated with the main drainage pipeline.

[0013] Further, the cross-sectional area of the main drainage pipeline is larger than that of the auxiliary drainage pipeline; the cross-sectional area of the redundant air discharge pipeline is smaller than that of the main drainage pipeline and larger than that of the auxiliary drainage pipeline.

[0014] Further, the cross-sectional areas of the redundant hydrogen discharge pipeline, the pressure relief hydrogen discharge pipeline and the auxiliary drainage pipeline are the same or similar.

[0015] Further, the water collector includes a main water inlet and an auxiliary water inlet which are respectively communicated with the main drainage pipeline and the auxiliary drainage pipeline, wherein the main water inlet is located above the auxiliary water inlet.

[0016] Further, the water collector includes an air outlet and a water outlet. The air outlet is located at the upper part of the water collector, and the water outlet is located at the bottom of the water collector.

[0017] The present application also provides a vehicle, including the above hydrogen fuel cell system.

[0018] By arranging a drainage assembly with a main drainage pipeline and an auxiliary drainage pipeline between the water collector and the stack assembly, the hydrogen fuel cell system provided by the present application can prevent water vapor condensation during the process of the water discharged from the stack assembly being transmitted to the water collector, and the water collector can also collect the water generated by the stack assembly for subsequent water reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with this specification and used together with the specification to explain the principles of this specification.

[0020] Figure 1 It is a schematic diagram of the hydrogen fuel cell system provided by the present application.

[0021] Figure 2 It is a schematic connection diagram of an embodiment of the water collector and the stack assembly provided by the present application.

[0022] Figure 3 Schematic connection diagram of another embodiment of the water collector and the stack assembly provided for this application.

[0023] Description of reference numerals: 10, stack assembly; 20, drainage assembly; 21, main drainage pipeline; 22, auxiliary drainage pipeline; 23, excess air discharge pipeline; 24, excess hydrogen discharge pipeline; 25, pressure relief hydrogen discharge pipeline; 26, purge gas discharge pipeline; 30, water collector; 31, main water inlet; 32, auxiliary water inlet; 33, gas outlet; 34, water outlet; 40, water-gas separation device; 401, air inlet; 402, exhaust port; 403, drainage port; 404, hydrogen inlet pipeline; 41, water separator; 42, ejector. Detailed implementation manners

[0024] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with this specification. On the contrary, they are merely examples of devices and methods consistent with some aspects of this specification as detailed in the appended claims.

[0025] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this specification should have the ordinary meaning understood by those of ordinary skill in the art to which this application belongs. The terms "first", "second" and similar words used in this specification and the claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "an" do not indicate a quantity limitation, but indicate the existence of one. "Multiple" or "several" means two or more. Unless otherwise specified, words such as "front part", "rear part", "lower part" and / or "upper part" are only for convenience of description and are not limited to one position or a spatial orientation. The words "include" or "comprise" and similar words mean that the elements or items appearing before "include" or "comprise" cover the elements or items listed after "include" or "comprise" and their equivalents, and do not exclude other elements or items. The words "connect" or "be connected" and similar words are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.

[0026] The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms "a", "the", and "said" used in this specification and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0027] Next, the embodiments of this specification will be described in detail.

[0028] Please refer Figures 1 to 2 As shown, this application provides a hydrogen fuel cell system, including: a stack assembly 10, a drainage assembly 20, and a water collector 30. The drainage assembly 20 is disposed between the stack assembly 10 and the water collector 30 and connects the stack assembly 10 and the water collector 30. The stack assembly 10 transports the reacted air, hydrogen, and generated water to the water collector 30 through the drainage assembly 20.

[0029] The hydrogen fuel cell system further includes a water-gas separation device 40. The water-gas separation device 40 includes a water separator 41 and an ejector 42. The water separator 41 and the ejector 42 are separately arranged, and are interconnected through pipelines between the water separator 41 and the ejector 42. An exhaust port 402 and a hydrogen inlet pipeline 404 are provided on the ejector 42, an inlet port 401 and a drainage port 403 are provided on the water separator 41, the inlet port 401 and the exhaust port 402 are respectively connected to the stack assembly 10, and the drainage port 403 is connected to the water collector 30 through the drainage assembly 20.

[0030] In another embodiment, please refer Figure 3 As shown, the water separator 41 and the ejector 42 are integrally arranged, and are internally interconnected between the water separator 41 and the ejector 42. An exhaust port 402 and a hydrogen inlet pipeline 404 are provided on the ejector 42, an inlet port 401 and a drainage port 403 are provided on the water separator 41, the inlet port 401 and the exhaust port 402 are respectively connected to the stack assembly 10, and the drainage port 403 is connected to the water collector 30 through the drainage assembly 20.

[0031] The drainage assembly 20 includes a main drainage pipeline 21, a secondary drainage pipeline 22, an excess air discharge pipeline 23, an excess hydrogen discharge pipeline 24, a pressure relief hydrogen discharge pipeline 25, and a purge gas discharge pipeline 26.

[0032] The water collector 30 includes a main water inlet 31, a secondary water inlet 32, an air outlet 33, and a water outlet 34. The main water inlet 31 and the secondary water inlet 32 are arranged on the same side, and the main water inlet 31 is disposed above the secondary water inlet 32. The air outlet 33 is provided at the upper part of the water collector 30, and the water outlet 34 is provided at the bottom of the water collector 30.

[0033] One end of the main drainage pipeline 21 is connected to the stack assembly 10, and the other end is connected to the main water inlet 31 of the water collector 30. One end of the auxiliary drainage pipeline 22 is connected to the drainage port 403 on the water distributor 41, and the other end is connected to the auxiliary water inlet 32 of the water collector 30. The excess air discharge pipeline 23, the excess hydrogen discharge pipeline 24, and the purge gas discharge pipeline 26 all extend from the stack assembly 10 and are connected to the main drainage pipeline 21. In one embodiment, the pressure relief hydrogen discharge pipeline 25 can extend from the stack assembly 10 and be connected to the main drainage pipeline 21, or as Figure 2 shown, it can extend from the ejector 42 and be connected to the main drainage pipeline 21, and this application does not limit this.

[0034] The cross-sectional area of the main drainage pipeline 21 is larger than that of the auxiliary drainage pipeline 22. The cross-sectional area of the excess air discharge pipeline 23 is smaller than that of the main drainage pipeline 21 and larger than that of the auxiliary drainage pipeline 22. The cross-sectional areas of the excess hydrogen discharge pipeline 24 and the pressure relief hydrogen discharge pipeline 25 are the same as or similar to that of the auxiliary drainage pipeline 22.

[0035] Reverse valves are provided on one side of the main drainage pipeline 21 and the auxiliary drainage pipeline 22 close to the main water inlet 31 and the auxiliary water inlet 32 as an anti-backflow structure to prevent the water entering the water collector 30 from flowing back from the water collector 30 to the stack assembly 10.

[0036] The air circuit of the hydrogen fuel cell system provided in this application is as follows: Air enters the stack assembly 10 from the pipeline and reacts with hydrogen to generate electrical energy for supplying the hydrogen fuel cell system. The excess air after the reaction is discharged from the stack assembly 10, passes through the excess air discharge pipeline 23 and the main drainage pipeline 21, and enters the water collector 30.

[0037] The hydrogen circuit of the hydrogen fuel cell system provided in this application is as follows: Hydrogen enters the ejector 42 from the hydrogen inlet pipeline 404 and is transmitted to the stack assembly 10 via the ejector 42; the hydrogen entering the stack assembly 10 reacts with air, and part of the unreacted excess hydrogen is discharged from the stack assembly 10 and enters the excess hydrogen discharge pipeline 24 and the main drainage pipeline 21 and then enters the water collector 30.

[0038] Part of the reacted hydrogen carries the water vapor generated by the reaction, so it enters the water distributor 41 from the stack assembly 10 through the air inlet 401 to separate the water vapor, then returns to the ejector 42 and is transmitted to the stack assembly 10 again through the exhaust port 402 for the recycling of hydrogen.

[0039] After the recycled hydrogen enters the ejector 42, it will mix with the hydrogen originally transmitted to the stack assembly 10 by the ejector 42, causing the hydrogen pressure in the ejector 42 to increase. Therefore, the ejector 42 discharges part of the hydrogen to the main drainage pipeline 21 through the pressure relief hydrogen discharge pipeline 25, thereby playing a role in reducing the hydrogen pressure.

[0040] The drainage circuit of the hydrogen fuel cell system provided by this application is as follows: The liquid water directly generated after the reaction of hydrogen and air in the fuel cell stack assembly 10 enters the water collector through the main drainage pipeline 21 and the main water inlet 31 for storage; part of the generated gaseous water is separated by the water separator 41 and enters the water collector 30 through the drainage port 403 on the water separator 41, the auxiliary drainage pipeline 22 and the auxiliary water inlet 32 for storage, and part directly enters the water collector 30 from the fuel cell stack assembly 10 through the purge gas discharge pipeline 26 and the main drainage pipeline 21 for storage.

[0041] The water collector 30 stores the incoming air, hydrogen, gaseous water and liquid water. Among them, hydrogen, air and gaseous water are discharged to the outside of the vehicle through the gas outlet 33 at the upper part of the water collector 30, and the liquid water is discharged to the outside of the vehicle through the water outlet 34 at the bottom of the water collector 30.

[0042] This application also provides a vehicle, including the above hydrogen fuel cell system.

[0043] By providing a drainage assembly with a main drainage pipeline and an auxiliary drainage pipeline between the water collector and the fuel cell stack assembly, the hydrogen fuel cell system provided by this application can prevent water vapor condensation during the process of water discharged from the fuel cell stack assembly being transmitted to the water collector. The water collector can also collect the water generated by the fuel cell stack assembly for subsequent water reuse.

[0044] Those skilled in the art will readily conceive of other embodiments of this specification after considering the specification and practicing the invention claimed herein. This specification is intended to cover any variations, uses, or adaptations of this specification that follow the general principles of this specification and include known common knowledge or conventional technical means in the technical field not claimed in this application. The specification and examples are only illustrative, and the true scope and spirit of this specification are pointed out by the following claims.

[0045] It should be understood that this specification is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of this specification is only limited by the appended claims.

[0046] The above are only the preferred embodiments of this specification and are not intended to limit this specification. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this specification shall be included within the scope of protection of this specification.

Claims

1. A hydrogen fuel cell system, characterized in that, Comprising: A stack assembly, a drainage assembly, and a water collector, wherein the drainage assembly is disposed between the stack assembly and the water collector; the drainage assembly includes a main drainage pipeline and an auxiliary drainage pipeline, and the main drainage pipeline and the auxiliary drainage pipeline are respectively communicated with the water collector.

2. The hydrogen fuel cell system according to claim 1, characterized in that, The main drainage pipeline is communicated with the stack assembly, the drainage assembly further includes a redundant air discharge pipeline extending from the stack assembly, and the redundant air discharge pipeline is communicated with the main drainage pipeline.

3. The hydrogen fuel cell system according to claim 1, characterized in that, The drainage assembly further includes a redundant hydrogen discharge pipeline extending from the stack assembly, and the redundant hydrogen discharge pipeline is communicated with the main drainage pipeline.

4. The hydrogen fuel cell system according to claim 3, characterized in that, The drainage assembly further includes a pressure relief hydrogen discharge pipeline extending from the stack assembly, and the pressure relief hydrogen discharge pipeline is communicated with the main drainage pipeline.

5. The hydrogen fuel cell system according to claim 1, characterized in that, The drainage assembly further includes a purge gas discharge pipeline extending from the stack assembly, and the purge gas discharge pipeline is communicated with the main drainage pipeline.

6. The hydrogen fuel cell system according to claim 1, characterized in that, The auxiliary drainage pipeline is connected to the stack assembly through a water-gas separation device, the water-gas separation device includes an air inlet, an air outlet, and a water outlet, the air inlet and the air outlet are respectively communicated with the stack assembly, and the water outlet is communicated with the auxiliary drainage pipeline.

7. The hydrogen fuel cell system according to claim 6, characterized in that, The water-gas separation device includes a water separator and an ejector which are communicated with each other; the water separator and the ejector are separately arranged; the air outlet is arranged on the ejector; the air inlet and the water outlet are arranged on the water separator; the drainage assembly further includes a pressure relief hydrogen discharge pipeline extending from the ejector, and the pressure relief hydrogen discharge pipeline is communicated with the main drainage pipeline.

8. The hydrogen fuel cell system according to claim 2, characterized in that, The cross-sectional area of the main drainage pipeline is larger than that of the auxiliary drainage pipeline; the cross-sectional area of the redundant air discharge pipeline is smaller than that of the main drainage pipeline and larger than that of the auxiliary drainage pipeline.

9. The hydrogen fuel cell system according to claim 4, characterized in that, The cross-sectional areas of the redundant hydrogen discharge pipeline, the pressure relief hydrogen discharge pipeline and the auxiliary drainage pipeline are the same or similar.

10. The hydrogen fuel cell system according to claim 1, characterized in that, The water collector includes a main water inlet and an auxiliary water inlet which are respectively communicated with the main drainage pipeline and the auxiliary drainage pipeline, wherein the main water inlet is located above the auxiliary water inlet.

11. The hydrogen fuel cell system according to claim 10, characterized in that, The water collector includes an air outlet and a water outlet, the air outlet is located at the upper part of the water collector, and the water outlet is located at the bottom of the water collector.

12. A vehicle, characterized in that, Including the hydrogen fuel cell system according to any one of claims 1-11.

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