Fuel cell system and automobile

Abstract

The utility model relates to the field of power devices of hybrid electric vehicles, and discloses a fuel cell system which comprises a rack, a DC / DC (Direct Current / Direct Current) converter, a fuel cell radiator and a first guide pipe, the rack is used for being fixedly connected to one side of the frame, and an air inlet is formed in the rack; the DC / DC converter is installed in the rack, the first guide pipe is arranged at the air inlet in a penetrating mode, the air outlet end of the first guide pipe is located in the rack and faces the DC / DC converter, the air inlet end of the first guide pipe is located on the outer side of the rack, and an opening of the first guide pipe faces the front; the fuel cell radiator is installed on the outer side of the rack, an air suction opening of the fuel cell radiator is right opposite to the rack, and the fuel cell radiator and the DC / DC converter are arranged in a spaced mode; according to the utility model, the DC / DC converter can have enough heat dissipation space, and the heat dissipation effect of the DC / DC converter is ensured.

Description

Technical Field

[0001] This utility model relates to the field of power units for hybrid electric vehicles, and more specifically to a fuel cell system and vehicle. Background Technology

[0002] In the fuel cell system of hybrid electric vehicles, the DC / DC converter is responsible for adjusting the voltage to meet the different needs of the accessories and fuel cell. However, in the compact layout space, the heat generated by the DC / DC converter during operation is difficult to dissipate effectively, which poses a significant challenge to its lifespan and reliability.

[0003] Air cooling is commonly used to dissipate heat from DC / DC converters. However, in confined spaces, air cooling for DC / DC converters faces significant limitations. First, due to restricted airflow, the air blown by the fan on the DC / DC converter cannot fully penetrate and effectively cool the heat dissipation surface, resulting in significantly reduced heat dissipation efficiency. This affects the performance stability of the DC / DC converter, accelerates its aging process, and shortens its lifespan. Second, the heat dissipation effect in confined spaces is more susceptible to interference from environmental factors, such as the heat generated by surrounding equipment and fluctuations in ambient temperature, leading to unstable heat dissipation and increasing the operational risks and uncertainties of the DC / DC converter.

[0004] To address the impact of limited space and environmental factors on the heat dissipation of DC / DC converters, existing technologies propose using a heat-insulating shroud to form a semi-enclosed structure above the heat-dissipating fins of the DC / DC converter. This blocks the hot airflow from the engine, providing insulation while also offering heat dissipation space for the DC / DC converter. However, this method provides very limited heat dissipation space and poor gas flow, failing to adequately guarantee the heat dissipation effect of the DC / DC converter. Utility Model Content

[0005] The purpose of this application is to provide a fuel cell system that can provide sufficient heat dissipation space for the DC / DC converter and ensure the heat dissipation effect of the DC / DC converter.

[0006] To achieve the above objectives, this application provides a fuel cell system comprising: a frame, a DC / DC converter, a fuel cell heat sink, and a first guide tube;

[0007] The frame is used to be fixedly connected to one side of the vehicle frame, and an air inlet is provided on the frame;

[0008] The DC / DC converter is installed in the rack, the first guide tube passes through the air inlet, the air outlet of the first guide tube is located inside the rack and faces the DC / DC converter, and the air inlet of the first guide tube is located outside the rack and the opening faces forward.

[0009] The fuel cell heat sink is mounted on the outside of the frame, and the air intake of the fuel cell heat sink is positioned directly opposite the frame. The fuel cell heat sink and the DC / DC converter are spaced apart.

[0010] As a preferred technical solution, the inner diameter of the air inlet end of the first guide pipe is larger than the inner diameter of the air outlet end, and the first guide pipe includes a tapering section, wherein the inner diameter of the tapering section gradually decreases along the direction from the air inlet end to the air outlet end.

[0011] As a preferred technical solution, the air inlet end of the first guide pipe is detachably equipped with a filter screen.

[0012] As a preferred technical solution, a second guide tube is also included. The second guide tube is disposed within the frame and located between the DC / DC converter and the fuel cell heat sink. The air inlet of the second guide tube faces the DC / DC converter, and the air outlet of the second guide tube faces the fuel cell heat sink.

[0013] As a preferred technical solution, the inner diameter of the air inlet of the second guide tube is larger than the inner diameter of the air outlet, and the second guide tube includes a variable diameter section, wherein the inner diameter of the variable diameter section gradually decreases along the direction from the air inlet to the air outlet.

[0014] As a preferred technical solution, the air inlet and the fuel cell heat sink are located on the same side of the frame.

[0015] As a preferred technical solution, the DC / DC converter is located on the front side of the fuel cell heat sink.

[0016] As a preferred technical solution, the fuel cell radiator and the DC / DC converter are respectively arranged on opposite sides of the frame.

[0017] This application also provides an automobile, including: a frame and a fuel cell system as described above, wherein the frame is fixedly connected to one side of the frame.

[0018] This application discloses a fuel cell system in which a DC / DC converter is located inside a frame. A first guide pipe directs air from outside the frame to the DC / DC converter. When the vehicle is moving, the oncoming airflow is concentrated through the first guide pipe and directed towards the DC / DC converter, providing initial cooling. A fuel cell radiator is located outside the frame, with its air intake facing the frame. The radiator and DC / DC converter are spaced apart, creating a large space between them. The radiator blades rotate, creating a negative pressure zone within this space. Utilizing the principle of air pressure difference, the initially cooled hot air is drawn into the negative pressure zone for heat exchange, constructing a dynamic air circulation system. This fuel cell DC / DC converter cooling assembly ensures sufficient cooling space for the DC / DC converter by adjusting the positions of the radiator and the converter, and utilizes the airflow during vehicle movement and the negative pressure zone generated by the radiator blades to cool the converter, ensuring effective cooling. Attached Figure Description

[0019] The present application will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are intended only to conceptually represent the composition or structure of the described objects and may contain exaggerated representations, and the drawings are not necessarily drawn to scale.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the first guide tube of this utility model;

[0022] The components are: 1. Rack; 2. DC / DC converter; 3. Fuel cell radiator; 4. First guide pipe; 41. Air inlet; 42. Air outlet; 43. Filter; 5. Second guide pipe; 51. Air inlet; 52. Air outlet. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0024] Please see Figure 1-2The fuel cell system provided in this application embodiment includes: a frame 1, a DC / DC converter 2, a fuel cell radiator 3, and a first guide pipe 4;

[0025] The frame 1 is used to be fixedly connected to one side of the vehicle frame, and an air inlet is provided on the frame 1;

[0026] The DC / DC converter 2 is installed inside the rack 1. The first guide pipe 4 passes through the air inlet. The air outlet 42 of the first guide pipe 4 is located inside the rack 1 and faces the DC / DC converter 2. The air inlet 41 of the first guide pipe 4 is located outside the rack 1 and the opening faces forward.

[0027] The fuel cell heat sink 3 is installed on the outside of the frame 1, and the air intake of the fuel cell heat sink 3 is positioned directly opposite the frame 1. The fuel cell heat sink 3 and the DC / DC converter 2 are spaced apart.

[0028] In this embodiment, the first guide pipe 4 connects the interior and exterior of the frame 1, and its air inlet 41 faces forward. When the vehicle is moving, the air pressure difference between the inside and outside of the frame 1 guides the oncoming airflow to the DC / DC converter 2 inside the frame 1 for initial heat dissipation. The fuel cell radiator 3 is located outside the frame 1, with its air inlet facing the frame 1. The fuel cell radiator 3 and the DC / DC converter 2 are spaced apart, effectively extending the heat dissipation path of the DC / DC converter 2 and increasing the heat dissipation space. The fan of the fuel cell radiator 3 rotates and forms a negative pressure area at its air inlet. The air pressure difference guides the hot air generated after initial heat dissipation to the negative pressure area for heat exchange, forming a good air circulation inside the frame 1. This ensures that the area around the DC / DC converter 2 always maintains a smooth airflow, avoids the occurrence of local heat accumulation, significantly enhances the heat dissipation effect of the DC / DC converter 2, effectively reduces its operating temperature, and thus extends the service life of the DC / DC converter 2, improving the reliability and stability of the entire fuel cell system.

[0029] Furthermore, the inner diameter of the air inlet 41 of the first guide pipe 4 is larger than the inner diameter of the air outlet 42, and the first guide pipe 4 includes a tapering section, the inner diameter of which gradually decreases from the air inlet 41 to the air outlet 42. Utilizing the principle that a smaller tapering pipe diameter results in a higher gas velocity, the oncoming airflow is guided, accelerated, and directed towards the DC / DC converter 2. The smaller inner diameter of the air outlet 42 facilitates entry into confined spaces, making it convenient to arrange the first guide pipe 4.

[0030] Furthermore, a filter screen 43 is detachably installed at the air inlet end 41 of the first guide pipe 4. The filter screen 43 can effectively filter out leaves, debris, etc. from the outside, preventing the first guide pipe 4 from becoming clogged and affecting the airflow entering the pipe.

[0031] Furthermore, a second guide pipe 5 is included, which is disposed within the frame 1 and located between the DC / DC converter 2 and the fuel cell heat sink 3. The air inlet 51 of the second guide pipe 5 faces the DC / DC converter 2, and the air outlet 52 of the second guide pipe 5 faces the fuel cell heat sink 3. Utilizing the negative pressure effect generated at the air inlet of the fuel cell heat sink 3, the hot air generated by the DC / DC converter 2 is effectively concentrated and guided to this area for heat exchange through the second guide pipe 5, thereby improving heat dissipation efficiency and ensuring the stable operation of the DC / DC converter 2 within a compact space.

[0032] Furthermore, the inner diameter of the air inlet 51 of the second guide pipe 5 is larger than the inner diameter of the air outlet 52, and the second guide pipe 5 includes a variable diameter section, the inner diameter of which gradually decreases along the direction from the air inlet 51 to the air outlet 52. Similarly, by utilizing the principle that a smaller pipe diameter results in a higher airflow velocity, the second guide pipe 5 accelerates the hot air generated by the DC / DC converter 2, causing it to flow rapidly to the negative pressure area for heat exchange, thereby improving the heat dissipation rate.

[0033] Furthermore, the air inlet and the fuel cell heat sink 3 are located on the same side of the frame 1, and the DC / DC converter 2 is located in front of the fuel cell heat sink 3. The fuel cell heat sink 3 and the DC / DC converter 2 are respectively arranged along opposite sides of the frame 1. By changing the distribution positions of the DC / DC converter 2 and the fuel cell heat sink 3, the heat dissipation path of the DC / DC converter 2 is effectively extended, and the heat dissipation area of ​​the DC / DC converter 2 is expanded.

[0034] This application also provides an automobile, including: a frame and a fuel cell system as described above, wherein the frame 1 is fixedly connected to one side of the frame.

[0035] In summary, the fuel cell system provided in this embodiment creates a sufficiently large heat dissipation space for the DC / DC converter by simply arranging the DC / DC converter, radiator, etc., and adds a first guide pipe to connect the inner and outer sides of the frame to dissipate heat from the DC / DC converter by utilizing the airflow generated when the vehicle moves forward. A second guide pipe is also provided to quickly guide the hot air generated by the DC / DC converter to the negative pressure area generated by the rotation of the fuel cell radiator blades for exhaust heat exchange, forming a dynamic and efficient air circulation inside the frame, thereby improving the heat dissipation rate of the DC / DC converter.

[0036] This specification discloses the present application with reference to the accompanying drawings and also enables those skilled in the art to implement the application, including making and using any device or system, employing suitable materials, and using any combination of methods. The scope of this application is defined by the claimed technical solution and includes other instances that would occur to those skilled in the art. Such other instances shall be considered to fall within the scope of protection defined by the claimed technical solution, provided that they include structural elements that are not different from the literal language of the claimed technical solution, or contain equivalent structural elements that are not substantially different from the literal language of the claimed technical solution.

Claims

1. A fuel cell system, characterized in that, include: Rack, DC / DC converter, fuel cell heat sink and first guide tube; The frame is used to be fixedly connected to one side of the vehicle frame, and an air inlet is provided on the frame; The DC / DC converter is installed in the rack, the first guide tube passes through the air inlet, the air outlet of the first guide tube is located inside the rack and faces the DC / DC converter, and the air inlet of the first guide tube is located outside the rack and the opening faces forward. The fuel cell heat sink is mounted on the outside of the frame, and the air intake of the fuel cell heat sink is positioned directly opposite the frame. The fuel cell heat sink and the DC / DC converter are spaced apart.

2. The fuel cell system as described in claim 1, characterized in that, The inner diameter of the air inlet end of the first guide pipe is larger than the inner diameter of the air outlet end, and the first guide pipe includes a tapering section, the inner diameter of which gradually decreases along the direction from the air inlet end to the air outlet end.

3. The fuel cell system as described in claim 2, characterized in that, The air inlet end of the first guide pipe is detachably equipped with a filter screen.

4. The fuel cell system according to any one of claims 1-3, characterized in that, It also includes a second guide tube, which is disposed within the frame and located between the DC / DC converter and the fuel cell heat sink. The air inlet of the second guide tube faces the DC / DC converter, and the air outlet of the second guide tube faces the fuel cell heat sink.

5. The fuel cell system as described in claim 4, characterized in that, The inner diameter of the air inlet of the second guide tube is larger than the inner diameter of the air outlet, and the second guide tube includes a variable diameter section, the inner diameter of which gradually decreases along the direction from the air inlet to the air outlet.

6. The fuel cell system as described in claim 1, characterized in that, The air inlet and the fuel cell radiator are located on the same side of the frame.

7. The fuel cell system as described in claim 6, characterized in that, The DC / DC converter is located in front of the fuel cell heat sink.

8. The fuel cell system as described in claim 6, characterized in that, The fuel cell heat sink and the DC / DC converter are respectively arranged on opposite sides of the frame.

9. A car, characterized in that, include: The vehicle frame and the fuel cell system as described in any one of claims 1-8, wherein the frame is fixedly connected to one side of the vehicle frame.

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