Hydrogen mixing device for fuel cell

Abstract

The application discloses a hydrogen mixing device for a fuel cell, which comprises a stack, a water distributor, an ejector, a mixer and a hydrogen nozzle; the water distributor is connected with the hydrogen outlet of the stack at the input end, and the water distributor is connected with the input end of the ejector at the output end; the input end of the hydrogen nozzle is connected with the external hydrogen input; the output of the hydrogen nozzle and the output of the ejector are both connected with the input end of the mixer, and the mixing is carried out in the mixer; and the output end of the mixer is connected with the hydrogen input of the stack. The mixer comprises an input connecting ring and a mixing output ring; the main body of the input connecting ring is a circular ring, one end of the circular ring is narrowed to form the output interface of the ejector, and the side surface of the circular ring is provided with a hydrogen nozzle input connecting pipe; the mixing output ring is a hollow cylinder with a smaller diameter than the inner diameter of the input connecting ring, one end of the cylinder is closed, the other end forms the output interface of the mixer, and the side wall of the cylinder is uniformly provided with through holes for the mixed hydrogen to pass through. The hydrogen quality participating in the reaction of the stack is ensured to be uniform through the targeted design of the mixer.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fuel cells, and particularly relates to a hydrogen mixing device for a fuel cell. BACKGROUND

[0002] At present, with the wide application of electric vehicles, various battery technologies have been widely developed, which brings about the innovation of battery technology. Fuel cells have been widely used because they can directly convert chemical energy into electrical energy. However, it is found that after hydrogen gas in the fuel cell enters the stack reaction, it cannot be completely consumed. The remaining hydrogen gas is mixed with fresh hydrogen gas after passing through a water separation device and an ejector and then enters the stack to participate in the reaction again. However, the reacted hydrogen gas and fresh air cannot be uniformly mixed, which leads to different hydrogen gas qualities of each single piece of the stack participating in the reaction, thereby affecting the service life and efficiency of the stack. SUMMARY

[0003] The application aims to solve the technical problems of the prior art and provides a hydrogen mixing device for a fuel cell.

[0004] To achieve the above technical purposes, the technical scheme adopted by the application is as follows:

[0005] A hydrogen mixing device for a fuel cell, the device comprising a stack, a water separator, an ejector, a mixer and a hydrogen nozzle.

[0006] The water separator input end is connected to the hydrogen gas outlet of the stack, and the water separator outlet is connected to the ejector input end.

[0007] The hydrogen nozzle input end is connected to the external hydrogen gas input.

[0008] The hydrogen nozzle output and the ejector output are both connected to the mixer input end, and the mixing is carried out in the mixer.

[0009] The mixer output end is connected to the hydrogen gas input of the stack. The mixer comprises an input connection ring and a mixing output ring. The input connection ring is a circular ring, one end of which is narrowed to form an ejector output interface. The side surface of the circular ring is provided with a hydrogen nozzle input connection pipe. The mixing output ring is a hollow cylinder with a smaller diameter than the inner diameter of the input connection ring. One end of the cylinder is closed, and the other end forms a mixer output interface. The side wall of the cylinder is uniformly provided with through holes for the mixed hydrogen gas to pass through.

[0010] The closed end of the mixing output ring is inserted into the circular ring of the input connection ring, and the mixing output ring is fixed to the input connection ring by threads. The hydrogen nozzle input connection pipe and the through holes correspond to each other.

[0011] The application has the following beneficial effects:

[0012] After the hydrogen mixing device for fuel cell is used, the hydrogen quality participating in the reaction of the electric pile is ensured to be uniform through the specific design of the mixer, and the efficiency and service life of the electric pile are improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The figure is a system composition schematic diagram of the hydrogen mixing device for fuel cell.

[0014] Figure 2 The figure is a perspective view of the input connecting ring of the mixer of the hydrogen mixing device for fuel cell.

[0015] Figure 3 The figure is another perspective view of the input connecting ring of the mixer of the hydrogen mixing device for fuel cell.

[0016] Figure 4 The figure is a perspective view of the mixing output ring of the mixer of the hydrogen mixing device for fuel cell.

[0017] Figure 5 The figure is another perspective view of the mixing output ring of the mixer of the hydrogen mixing device for fuel cell.

[0018] Figure 6 The figure is a perspective view of the assembly of the mixer of the hydrogen mixing device for fuel cell.

[0019] Figure 7 The figure is another perspective view of the assembly of the mixer of the hydrogen mixing device for fuel cell.

[0020] Figure 8 The figure is a front view and A-A sectional view of the mixer of the hydrogen mixing device for fuel cell.

[0021] In the figure: 1, input connecting ring; 2, mixing output ring; 3, ejector output interface; 4, hydrogen spray input connecting pipe; 5, mixer output interface; 6, through hole; 7, thread. DETAILED DESCRIPTION

[0022] The embodiments of the present application are further described in detail below with reference to the accompanying drawings.

[0023] Reference Figure 1 A hydrogen mixing device for fuel cell, the device comprising an electric pile, a water distributor, an ejector, a mixer and a hydrogen spray;

[0024] The input end of the water distributor is connected with the hydrogen gas outlet of the electric pile, and the outlet of the water distributor is connected with the input end of the ejector;

[0025] The input end of the hydrogen spray is connected with external hydrogen gas input;

[0026] The hydrogen jet output and the ejector output are connected to the mixer input, and mixing is carried out in the mixer;

[0027] The mixer output is connected to the hydrogen input of the stack.

[0028] Referring to Figures 2-8 , the mixer comprises an input connection ring 1 and a mixing output ring 2, the input connection ring 1 is a circular ring in shape, one end of the circular ring is narrowed to form an ejector output interface 3, and a hydrogen jet input connection pipe 4 is arranged on the side of the circular ring; the mixing output ring 2 is a hollow cylinder with a smaller diameter than the inner diameter of the input connection ring 1, one end of the cylinder is closed, and the other end forms a mixer output interface 5, and through holes 6 are uniformly arranged on the side wall of the cylinder for the hydrogen gas after mixing to pass through.

[0029] In a specific implementation, the closed end of the mixing output ring 2 is inserted into the circular ring of the input connection ring 1, and the mixing output ring 2 is fixed to the input connection ring 1 through threads 7.

[0030] Working process:

[0031] When the hydrogen gas output by the ejector and the air output by the hydrogen jet enter the mixer, due to the structural design of the mixer, the number of times of twisting and mixing of the hydrogen gas output by the ejector and the hydrogen gas output by the hydrogen jet is prolonged, and the mixing degree of the hydrogen gas is greatly improved.

[0032] The hydrogen mixing device for the fuel cell of the present application, through the targeted design of the mixer, ensures the uniformity of the quality of the hydrogen gas participating in the reaction of the stack, and improves the efficiency and service life of the stack.

[0033] Although the present application has been described in detail above with general description and specific embodiments, some modifications or improvements can be made on the basis of the present application, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the present application, all belong to the scope of protection claimed by the present application.

Claims

1. A hydrogen mixing device for a fuel cell, characterized by: The device comprises a stack, a water segregator, an ejector, a mixer and a hydrogen jet; The water segregator input is connected to the stack hydrogen outlet, and the water segregator outlet is connected to the ejector input; The hydrogen jet input is connected to an external hydrogen input; The hydrogen jet output and the ejector output are both connected to the mixer input, and mixing is performed in the mixer; The mixer output is connected to the stack hydrogen input; the mixer comprises an input connecting ring (1) and a mixing output ring (2), the input connecting ring (1) is a circular ring, one end of the circular ring is narrowed to form an ejector output interface (3), and a hydrogen jet input connecting pipe (4) is arranged on the side of the circular ring; the mixing output ring (2) is a hollow cylinder with a smaller diameter than the inner diameter of the input connecting ring (1), one end of the cylinder is closed, the other end forms a mixer output interface (5), and through holes (6) are uniformly arranged on the side wall of the cylinder for the mixed hydrogen to pass through; the closed end of the mixing output ring (2) is inserted into the circular ring of the input connecting ring (1), the mixing output ring (2) is fixed to the input connecting ring (1) through threads (7), and the hydrogen jet input connecting pipe (4) corresponds to the through holes (6).

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