Protection structure of hydrogen fuel cell stack
By setting throttle at the intake and exhaust ends of the hydrogen fuel stack and controlling it through the control unit and upper computer, the catalyst damage caused by air entering the stack when it is not in use is solved, and the use of the stack is extended Lifespan and protects the humidifier.
Patent Information
- Application Number
- CN202421081454.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-17
AI Technical Summary
When the hydrogen fuel stack is not in use, air enters the catalyst poisoning, destruction of active sites and thermal damage, shortening the service life of the stack.
A protective structure of a hydrogen fuel stack is designed, and the first throttle valve and the second throttle valve are respectively set at the intake and exhaust ends of the humidifier, and controlled by the control unit and the upper computer, to ensure that the stack is shut down. Cut off air inflow.
By adding two throttle valves, the operating life of the stack is extended by about 30%, from the original 10,000 hours to about 13,000 hours, and also protect the humidifier and extend its life.
Smart Images
Figure CN222530464U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of protection of hydrogen fuel cell stacks, in particular to a protection structure of a hydrogen fuel cell stack. Background Art
[0002] With the rapid development of society, the demand for energy is constantly updating and breaking through. The development of new quality production is advancing by leaps and bounds. The hydrogen economy and hydrogen society will be inevitable in the future society.
[0003] At the end of the last century, my country's hydrogen energy developed rapidly. The core of the development of hydrogen energy is mainly the fuel cell stack. However, the current situation is that the quality of fuel cell stack products is uneven and there is no consensus on their service life. Strictly speaking, the service life of the fuel cell stack is the most core indicator of the quality of the fuel cell stack product.
[0004] When the stack is in use, especially when it is shut down, reducing the air entering the stack when it is not in use can extend the life of the stack. The main reasons are as follows:
[0005] Prevent catalyst poisoning: Especially in the working environment of industrial vehicles, the amount of dust in the air is generally large, and it contains certain harmful gases such as carbon monoxide, sulfur dioxide and hydrogen sulfide, which may cause catalyst poisoning, thereby reducing the activity of the catalyst and shortening the service life of the catalyst.
[0006] Avoid damage to the active sites of the catalyst: Large particulate matter in the air may damage the active sites on the surface of the catalyst, causing the activity of the catalyst to decrease, thereby shortening the service life of the catalyst.
[0007] Reduce thermal damage to the catalyst: Excessive air inflow may cause the temperature inside the fuel cell stack to be too high, causing thermal damage to the catalyst, thereby reducing the activity of the catalyst and shortening the service life of the catalyst.
[0008] Optimize the working environment of the catalyst: By reducing the entry of air when not in use, the working environment of the catalyst can be optimized, the stability and activity of the catalyst can be maintained, and the service life of the catalyst can be extended.
[0009] In summary, reducing the amount of air entering the fuel cell stack when it is not in use helps protect the catalyst from harmful gases, avoid damage to the catalyst's active sites, reduce thermal damage to the catalyst, and optimize the catalyst's working environment, thereby extending the life of the fuel cell stack. Utility Model Content
[0010] In order to solve the problems raised in the above background technology, the purpose of the present utility model is to provide a protective structure for a hydrogen fuel cell stack.
[0011] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a protective structure for a hydrogen fuel cell stack, comprising a humidifier, wherein the air inlet end of the humidifier is connected to a first throttle valve, and the input end of the first throttle valve is connected to an external air compressor, the exhaust end of the humidifier is connected to a second throttle valve, and the outlet end of the humidifier is connected to an external hydrogen fuel cell stack.
[0012] As a preferred embodiment of the present invention, a control unit is provided inside the first throttle valve and the second throttle valve, and the control unit is controlled by a host computer of the battery stack system.
[0013] As a preferred embodiment of the present invention, the input end and the output end of the first throttle valve and the second throttle valve are both provided with a sealing structure.
[0014] As a preferred embodiment of the present invention, a mounting piece is fixedly connected to the surface of the humidifier.
[0015] As a preferred embodiment of the present invention, a shock-absorbing pad is fixedly connected to the surface of the humidifier.
[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0017] 1. The utility model cooperates with the humidifier, the first throttle valve and the second throttle valve. After adding two throttle valves, the service life of the fuel cell stack is extended by about 30% through life experiment test. From the current domestic fuel cell stack life of 10,000 hours, after adding two throttle valves, the life can be extended to about 13,000 hours. It can be said that it is very meaningful to extend the life of the fuel cell stack with small investment. This structure also protects the humidifier and extends the life of the humidifier. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a three-dimensional schematic diagram of the humidifier, the first throttle valve and the second throttle valve of the utility model when used in combination;
[0019] Figure 2 It is a three-dimensional schematic diagram of the first throttle valve of the utility model;
[0020] Figure 3 It is a three-dimensional schematic diagram of the second throttle valve of the utility model;
[0021] Figure 4 This is a schematic diagram of the technical route of this utility model.
[0022] In the figure: 1. Humidifier; 2. First throttle valve; 3. Second throttle valve; 4. Control unit; 5. Sealing structure; 6. Mounting parts; 7. Shock-absorbing pad. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] like Figures 1 to 4 As shown, the utility model provides a protective structure for a hydrogen fuel cell stack, including a humidifier 1, an air inlet end of the humidifier 1 is connected to a first throttle valve 2, and an input end of the first throttle valve 2 is connected to an external air compressor, an exhaust end of the humidifier 1 is connected to a second throttle valve 3, and an outlet end of the humidifier 1 is connected to an external hydrogen fuel cell stack.
[0025] refer to Figure 1 A control unit 4 is provided inside the first throttle valve 2 and the second throttle valve 3, and the control unit 4 is controlled by the upper computer of the battery stack system.
[0026] As a technical optimization solution of the utility model, the control unit 4 is set to ensure that the system is turned on when running and turned off when shutting down.
[0027] refer to Figure 1 The input end and the output end of the first throttle valve 2 and the second throttle valve 3 are both provided with a sealing structure 5.
[0028] As a technical optimization solution of the present invention, the sealing performance of the first throttle valve 2 and the second throttle valve 3 after being connected is ensured by setting the sealing structure 5.
[0029] refer to Figure 1 A mounting member 6 is fixedly connected to the surface of the humidifier 1 .
[0030] As a technical optimization solution of the present invention, the installation part 6 is provided to provide an installation position for the humidifier 1, so that the staff can install it conveniently.
[0031] refer to Figure 1 A shock-absorbing pad 7 is fixedly connected to the surface of the humidifier 1 .
[0032] As a technical optimization solution of the present invention, the provision of the shock-absorbing pad 7 can provide functions such as sound insulation, buffering, shock absorption and vibration isolation in addition to the shock-absorbing function.
[0033] refer to Figure 1 The first throttle valve 2 and the second throttle valve 3 are provided with an airtightness self-checking program, and the airtightness self-checking program is controlled by the upper computer of the fuel cell system.
[0034] As a technical optimization solution of the utility model, the failure mechanism of the first throttle valve 2 and the second throttle valve 3 can be avoided by setting the airtightness self-checking program.
[0035] The working principle and use process of the utility model are as follows: a first throttle valve 2 and a second throttle valve 3 are added to the air pipeline of the battery stack system, and the sealing and reliability of the first throttle valve 2 and the second throttle valve 3 after installation need to be ensured, and they are controlled by the upper computer to ensure that when the battery stack is shut down, the connection between the cathode pipeline and the outside world can be cut off by closing the relevant first throttle valve 2 and the second throttle valve 3. This method is simple and easy to implement. In addition, through life experiment tests, the operating life of the battery stack is extended by about 30%. From the current domestic battery stack life of 10,000 hours, after adding the first throttle valve 2 and the second throttle valve 3, the life can be extended to about 13,000 hours. Therefore, it is very meaningful to extend the life of the battery stack, and the investment is small. This structure also protects the humidifier and extends the life of the humidifier.
[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A protective structure for a hydrogen fuel cell stack, comprising a humidifier (1), characterized in that: The air inlet end of the humidifier (1) is connected to a first throttle valve (2), and the input end of the first throttle valve (2) is connected to an external air compressor; the exhaust end of the humidifier (1) is connected to a second throttle valve (3), and the outlet end of the humidifier (1) is connected to an external hydrogen fuel cell stack.
2. The protective structure of a hydrogen fuel cell stack according to claim 1, characterized in that: A control unit (4) is provided inside the first throttle valve (2) and the second throttle valve (3), and the control unit (4) is controlled by a host computer of the battery stack system.
3. The protective structure of a hydrogen fuel cell stack according to claim 1, characterized in that: The input end and the output end of the first throttle valve (2) and the second throttle valve (3) are both provided with sealing structures (5).
4. The protective structure of a hydrogen fuel cell stack according to claim 1, characterized in that: A mounting component (6) is fixedly connected to the surface of the humidifier (1).
5. The protective structure of a hydrogen fuel cell stack according to claim 1, characterized in that: A shock-absorbing pad (7) is fixedly connected to the surface of the humidifier (1).