Auxiliary device for starting hydrogen fuel cell

Abstract

The utility model provides a hydrogen fuel cell starting auxiliary device, and belongs to the technical field of hydrogen fuel cells. The technical problem of long cold start time of the hydrogen fuel cell under a low-temperature condition is solved. Comprising a reaction cover which is a cavity shell, the interior of a cavity is used for reaction of hydrogen and oxygen, two gas input pipes inject the hydrogen and the oxygen into the cavity respectively, and when the hydrogen battery is started, due to the fact that the reaction in the cavity is too slow or even does not react, the pressure in the gas input pipes continuously rises; along with the increase of the air pressure, the driving assembly drives a heat exchange medium in the medium injection assembly to be injected into the annular cavity, so that the temperature in the cavity is rapidly increased, and the hydrogen fuel cell is assisted to be rapidly started.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen fuel cell technology, and in particular to a hydrogen fuel cell start-up auxiliary device. Background Technology

[0002] Hydrogen energy is an important zero-carbon energy source, hailed as the energy of humanity's future. Hydrogen fuel cell transportation is a crucial pillar and core carrier for the development of hydrogen energy. However, hydrogen fuel cells face a cold-start challenge at low temperatures. Although purging after shutdown can partially alleviate the cold-start problem, the long cold-start time remains a significant technical issue at low temperatures. Utility Model Content

[0003] In view of this, the present invention aims to provide a hydrogen fuel cell start-up auxiliary device to solve the technical problem of long cold start time of hydrogen fuel cells under low temperature conditions.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: According to one aspect of the present invention, a hydrogen fuel cell start-up auxiliary device is provided, comprising:

[0005] The reaction hood is a hollow shell with two gas input pipes at the upper end that are connected to the reaction chamber, and an annular cavity inside.

[0006] The medium injection assembly is mounted on the reaction vessel and communicates with the annular cavity, and contains a heat exchange medium inside.

[0007] The PTC heater is mounted on the reaction vessel and coupled to the media injection assembly;

[0008] The drive assembly, connected to the gas input pipe, drives the medium injection assembly to inject the heat exchange medium into the annular cavity.

[0009] Furthermore, the drive assembly includes a connecting pipe and a pusher, the medium injection assembly is connected to the gas input pipe through the connecting pipe, one end of the pusher slides inside the connecting pipe, and the other end slides outside the connecting pipe.

[0010] Furthermore, the medium injection assembly includes a receiving cylinder, inside which are a first receiving cavity and a second receiving cavity that are interconnected. A pushing disc slides inside the first receiving cavity. The first receiving cavity is connected to an annular cavity. The first receiving cavity contains a heat exchange medium. The second receiving cavity is connected to a connecting pipe.

[0011] Furthermore, the connecting pipe is equipped with a reset assembly that drives the pusher to approach the gas input pipe.

[0012] Furthermore, the reset assembly includes a sliding frame and an elastic part, the elastic part being connected to the sliding frame, and the other end being connected to a push bolt.

[0013] Furthermore, the pusher is connected to the elastic part via a limiting component, the limiting component slides inside the sliding frame, and the limiting component prevents the elastic part from returning to its original position after compression.

[0014] Furthermore, the limiting component includes a sliding block with a sliding groove inside, two limiting balls sliding inside the sliding groove, a limiting spring between the two limiting balls, and a limiting groove on the sliding frame that cooperates with the limiting balls.

[0015] Furthermore, the elastic part is a spring.

[0016] Furthermore, the medium injection assembly is provided with an external heat insulation section.

[0017] Furthermore, hydraulic oil is provided between the connecting pipe and the second receiving cavity.

[0018] Beneficial effects:

[0019] The reaction chamber is a hollow shell, and the interior of the cavity is used for the reaction of hydrogen and oxygen. Two gas input pipes inject hydrogen and oxygen into the cavity respectively. When the hydrogen fuel cell starts, because the reaction inside the cavity is too slow or even not at all, the pressure inside the gas input pipes continuously increases. As the gas pressure increases, the driving component's driving medium is injected into the heat exchange medium inside the component, which is then injected into the annular cavity, causing the temperature inside the cavity to rise rapidly, thereby assisting the hydrogen fuel cell to start up quickly. Attached Figure Description

[0020] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0021] In the attached diagram:

[0022] Figure 1 This is a schematic diagram of the overall structure of a hydrogen fuel cell start-up auxiliary device according to the present invention;

[0023] Figure 2 This is a cross-sectional view of a hydrogen fuel cell start-up auxiliary device according to the present invention;

[0024] Figure 3 This is a cross-sectional view of the limiting component of a hydrogen fuel cell start-up auxiliary device according to the present invention;

[0025] Figure 4 for Figure 3 Schematic diagram A (partial enlargement).

[0026] 1. Reaction chamber; 2. Annular cavity; 3. Gas input pipe; 4. Connecting pipe; 5. Pushing bolt; 6. Sliding frame; 7. Sliding block; 8. Elastic part; 9. Sliding groove; 10. Limiting ball; 11. Limiting spring; 12. Storage cylinder; 13. First storage cavity; 14. Second storage cavity; 15. PTC heater; 16. Insulation part; 17. Pushing plate; 18. Limiting groove. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0028] It should be noted that the descriptions of "left," "right," "left side," "right side," "upper part," "lower part," "top," and "bottom" in this utility model are defined based on the orientation or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and are not intended to indicate or imply that the described structure must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0029] In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Referring to the accompanying drawings, this embodiment is described. According to one aspect of the present invention, a hydrogen fuel cell start-up assistance device is provided, comprising:

[0031] The reaction chamber 1 is a hollow shell with two gas input pipes 3 at the upper end, which are connected to the reaction chamber. The interior has an annular cavity 2. The reaction chamber 1 is a battery shell, and the interior of the battery shell is used for the reaction. Hydrogen gas is injected into the interior of the reaction chamber 1 through the input pipes 3 to react. The inner wall of the reaction chamber 1 has an annular cavity 2. When the annular cavity 2 is filled with PCM heat exchange medium, it heats the reaction chamber inside the reaction chamber 1.

[0032] The medium injection assembly, which contains a heat exchange medium, is installed on the reaction chamber 1 and communicates with the annular cavity 2; the medium injection assembly injects the heat exchange medium for PCM into the annular cavity 2.

[0033] PTC heater 15 is mounted on reaction vessel 1 and coupled to the media injection assembly. The PTC heater's resistance increases with temperature. At low temperatures, the PTC provides high-power heating for rapid temperature rise; as the temperature approaches the optimal level, the heating power automatically decreases to prevent overheating. The PCM (Polymerized Thermal Management System) provides basic heat, and the PTC is precisely adjusted in real-time to ensure adequate heating under various low-temperature conditions.

[0034] The drive assembly, connected to the gas input pipe 3, drives the medium injection assembly to inject the heat exchange medium into the annular cavity 2. When the oxygen and hydrogen consumed by the reaction are lower than the replenishment rate, the gas pressure inside the gas input pipe 3 will drive the medium inside the medium injection assembly to be injected into the annular cavity 2 through the drive assembly.

[0035] In this embodiment, the driving component includes a connecting pipe 4 and a pusher 5. The medium injection component is connected to the gas input pipe 3 through the connecting pipe 4. One end of the pusher 5 slides inside the connecting pipe 4, and the other end slides outside the connecting pipe 4. When the oxygen and hydrogen consumed by the reaction are lower than the replenishment rate, the pressure inside the gas input pipe 3 will push the pusher 5 to move. The pusher 5 pushes the hydraulic oil inside the connecting pipe 4 into the medium injection component to drive the medium injection component to discharge the heat exchange medium.

[0036] In this embodiment, the medium injection assembly includes a receiving cylinder 12, inside which are a first receiving cavity 13 and a second receiving cavity 14 that are interconnected. A pushing disk 17 slides inside the first receiving cavity 13. The first receiving cavity 13 is connected to the annular cavity 2 and contains a heat exchange medium. The second receiving cavity 14 is connected to a connecting pipe 4. Hydraulic oil inside the connecting pipe 4 enters the second receiving cavity 14 under the push of the pushing bolt 5. As the hydraulic oil inside the second receiving cavity 14 is injected, it drives the pushing disk 17 to move. The moving pushing disk 17 pushes the heat exchange medium inside the first receiving cavity 13 into the annular cavity 2 to heat the reaction chamber inside the reaction hood 1, thereby enabling the hydrogen fuel cell to start up quickly.

[0037] In this embodiment, the connecting pipe 4 is provided with a reset assembly that drives the pusher 5 to approach the gas input pipe 3. The reset assembly includes a sliding frame 6 and an elastic part 8. The elastic part 8 is connected to the sliding frame 6, and the other end is connected to the pusher 5. The elastic part 8 is a spring. When the pusher 5 moves away from the gas input pipe 3, it compresses the elastic part 8. When the reaction chamber resumes normal reaction, the pressure inside the gas input pipe 3 continuously decreases. As the pressure decreases, the compressed elastic part 8 pushes the pusher 5 to reset.

[0038] In this embodiment, the pusher 5 is connected to the elastic part 8 via a limiting component. The limiting component slides inside the sliding frame 6 and prevents the compressed elastic part 8 from resetting. The limiting component includes a sliding block 7, which has a sliding groove 9 inside. Two limiting balls 10 slide inside the sliding groove 9, and a limiting spring 11 is provided between the two limiting balls 10. The sliding frame 6 has a limiting groove 18 that cooperates with the limiting balls 10. When the pusher 5 moves, it drives the sliding block 7 to move. When the sliding block 7 moves to the limiting ball 10 and enters the limiting groove 18, the pusher 5 will not reset before the gas pressure in the gas input pipe 3 drops to a predetermined value to ensure the temperature inside the hydrogen fuel cell reaction chamber. When the temperature drops to the preset temperature, the compressed elastic part 8 pushes the pusher 5 to reset quickly.

[0039] In this embodiment, the medium injection component is provided with an insulation part 16, which is a sponge insulation sleeve, and the material is selected according to the actual situation.

[0040] The sensors, controllers, and control programs mentioned above are all existing technologies and will not be elaborated upon.

[0041] The embodiments of the present invention disclosed above are merely illustrative of the present invention. The embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. A hydrogen fuel cell start-up auxiliary device, characterized in that, include: The reaction hood (1) is a hollow shell with two gas input pipes (3) at the top and connected to the reaction chamber. The interior is provided with an annular cavity (2). The medium injection assembly is set on the reaction vessel (1) and communicates with the annular cavity (2), and is equipped with a heat exchange medium inside; A PTC heater (15) is mounted on the reaction vessel (1) and coupled to the media injection assembly; The drive assembly is connected to the gas input pipe (3) and is used to drive the medium injection assembly to inject the heat exchange medium into the annular cavity (2).

2. The hydrogen fuel cell start-up auxiliary device according to claim 1, characterized in that: The drive assembly includes a connecting pipe (4) and a pusher (5). The medium injection assembly is connected to the gas input pipe (3) through the connecting pipe (4). One end of the pusher (5) slides inside the connecting pipe (4), and the other end slides outside the connecting pipe (4).

3. The hydrogen fuel cell start-up auxiliary device according to claim 2, characterized in that: The medium injection assembly includes a receiving cylinder (12), which has a first receiving cavity (13) and a second receiving cavity (14) that are interconnected. The pushing disk (17) slides inside the first receiving cavity (13). The first receiving cavity (13) is connected to the annular cavity (2). The first receiving cavity (13) is filled with heat exchange medium. The second receiving cavity (14) is connected to the connecting pipe (4).

4. The hydrogen fuel cell start-up auxiliary device according to claim 3, characterized in that: The connecting pipe (4) is provided with a reset component that drives the pusher (5) to approach the gas input pipe (3).

5. A hydrogen fuel cell start-up auxiliary device according to claim 4, characterized in that: The reset assembly includes a sliding frame (6) and an elastic part (8). One end of the elastic part (8) is connected to the sliding frame (6), and the other end is connected to the push pin (5).

6. The hydrogen fuel cell start-up auxiliary device according to claim 5, characterized in that: The pusher (5) is connected to the elastic part (8) through a limiting component. The limiting component slides inside the sliding frame (6) and is used to prevent the elastic part (8) from resetting after compression.

7. A hydrogen fuel cell start-up auxiliary device according to claim 6, characterized in that: The limiting component includes a sliding block (7), a sliding groove (9) inside the sliding block (7), two limiting balls (10) sliding inside the sliding groove (9), a limiting spring (11) between the two limiting balls (10), and a limiting groove (18) on the sliding frame (6) that cooperates with the limiting balls (10).

8. A hydrogen fuel cell start-up aid device according to any one of claims 5-7, characterized in that: The elastic part (8) is a spring.

9. A hydrogen fuel cell start-up aid device according to any one of claims 1-7, characterized in that: The medium injection assembly is provided with an external heat insulation part (16).

10. A hydrogen fuel cell start-up aid device according to any one of claims 3-7, characterized in that: Hydraulic oil is provided between the connecting pipe (4) and the second receiving cavity (14).

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