Hydrogen discharge and drainage buffer device of fuel cell system

Abstract

The utility model discloses a hydrogen water outlet and drainage buffer device of a fuel cell system, which is characterized in that the hydrogen water outlet and drainage buffer device comprises a buffer tank shell (1), a water inlet (2) and a water outlet (3) are respectively arranged at two ends of the buffer tank shell (1), and the water inlet (2) and the water outlet (3) are respectively positioned at two ends of an upper diagonal line of a rectangle formed by a longitudinal section of the buffer tank shell (1). A water inlet (2) and a water outlet (3) are formed in the buffer tank shell (1), an electromagnetic valve seat (4) is further arranged on the buffer tank shell (1) outside the water inlet (2) and the water outlet (3), an electromagnetic valve (5) is arranged on the electromagnetic valve seat (4), an electric heating layer (6) is further arranged on the surface of the electromagnetic valve seat (4) and fixedly connected to the electromagnetic valve seat (4) through a pressing plate (7), and a temperature sensor (8) is further arranged on the pressing plate (7).

Description

Technical Field

[0001] The utility model relates to the field of fuel cells, in particular to a hydrogen outlet and outlet buffer device for a fuel cell system. Background Art

[0002] As a new energy source, fuel cells have the advantages of high power generation efficiency, low noise, no pollution, stable operation, and wide application fields. At present, they have been recognized and used by a large number of users. In order to meet customer needs, the power types of fuel cell systems are becoming more and more diverse, the performance is becoming more and more perfect, and the various important devices that make up the fuel cell system are also being continuously optimized.

[0003] As an important part of the fuel cell system, the hydrogen outlet and drainage device is used to drain the water from the hydrogen path of the fuel cell system. The existing hydrogen path drainage scheme of the fuel cell system is to drain the water directly after connecting the pipe and the solenoid valve. However, this scheme will cause a sudden drop in the pressure of the hydrogen path of the fuel cell system while draining the water, thus affecting the stability of the system;

[0004] At the same time, if a vehicle equipped with a fuel cell is in a low-temperature environment, the liquid water in the traditional hydrogen outlet and drainage device may freeze due to the low temperature during operation, making it impossible to drain smoothly, affecting the normal operation of the fuel cell.

[0005] Therefore, a method or device capable of solving the above problems is now needed. Summary of the invention

[0006] The utility model aims to solve the above-mentioned deficiencies in the prior art and proposes a fuel cell system hydrogen outlet and water discharge buffer device which has a simple structure, ingenious design, and reasonable layout, can ensure the stability of the gas pressure in the hydrogen path of the fuel cell system, and can still work normally in a low temperature environment.

[0007] The technical solution of the utility model is: a hydrogen outlet and outlet buffer device for a fuel cell system, characterized in that: the device comprises a buffer tank shell 1, and a water inlet 2 and a water outlet 3 are respectively arranged at both ends of the buffer tank shell 1, and the water inlet 2 and the water outlet 3 are respectively located at the two ends of the upper diagonal of the rectangle formed by the longitudinal section of the buffer tank shell 1, and an electromagnetic valve seat 4 is also arranged on the buffer tank shell 1 outside the water inlet 2 and the water outlet 3,

[0008] The electromagnetic valve seat 4 is provided with an electromagnetic valve 5, and the surface of the electromagnetic valve seat 4 is also provided with an electric heating layer 6, and the electric heating layer 6 is fixedly connected to the electromagnetic valve seat 4 through a pressing plate 7, and a temperature sensor 8 is also provided on the pressing plate 7.

[0009] An inlet buffer plate 9 and an outlet buffer plate 10 are arranged in the buffer tank shell 1. The inlet buffer plate 9 and the outlet buffer plate 10 are distributed along the length direction of the buffer tank shell 1. The inlet buffer plate 9 is located below the water inlet 2, and the outlet buffer plate 10 is located above the water outlet 3.

[0010] The buffer tank shell 1 is formed by two half shells 11 being spliced ​​together, and a sealing ring 12 is arranged between the two half shells 11 .

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] The hydrogen outlet and drainage buffer device of the fuel cell system of this structural form has a simple structure, ingenious design and reasonable layout. It is designed to solve the problems existing in the traditional fuel cell hydrogen outlet and drainage system during operation. First, it sets solenoid valves at the water inlet and outlet. When the hydrogen path of the fuel cell system starts to drain, the water inlet of the device is opened and the water outlet is closed, and the water enters the inner cavity of the buffer tank shell. After a period of time, the water inlet is closed and the water outlet is opened, and the water is discharged through the water outlet, so that the hydrogen pressure in the fuel cell system can be prevented from changing dramatically, thereby ensuring the stability of the system operation; and electric heating layers and temperature sensors are also arranged on the valve seats at the water inlet and the water outlet. When the temperature sensor detects that the ambient temperature is lower than 0°C, the electric heating layer will be powered on to dissipate heat to prevent the water at the water inlet from freezing, thereby ensuring that the fuel cell system can drain normally; and the manufacturing process of the device is simple and the manufacturing cost is low, so it can be said that it has many advantages and is particularly suitable for promotion and application in this field, and its market prospects are very broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0014] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings: Figure 1 As shown, a hydrogen outlet and outlet buffer device for a fuel cell system comprises a buffer tank shell 1 as a basis, wherein a water inlet 2 and a water outlet 3 are respectively arranged at two ends of the buffer tank shell 1, and the water inlet 2 and the water outlet 3 are respectively located at two ends of the upper diagonal of a rectangle formed by the longitudinal section of the buffer tank shell 1, and an electromagnetic valve seat 4 is also arranged on the buffer tank shell 1 outside the water inlet 2 and the water outlet 3.

[0015] The electromagnetic valve seat 4 is provided with an electromagnetic valve 5, and the surface of the electromagnetic valve seat 4 is also provided with an electric heating layer 6, and the electric heating layer 6 is fixedly connected to the electromagnetic valve seat 4 through a pressing plate 7, and a temperature sensor 8 is also provided on the pressing plate 7.

[0016] An inlet buffer plate 9 and an outlet buffer plate 10 are arranged in the buffer tank shell 1. The inlet buffer plate 9 and the outlet buffer plate 10 are distributed along the length direction of the buffer tank shell 1. The inlet buffer plate 9 is located below the water inlet 2, and the outlet buffer plate 10 is located above the water outlet 3.

[0017] The buffer tank shell 1 is formed by two half shells 11 spliced ​​together, and a sealing ring 12 is arranged between the two half shells 11. This structure of splicing together after being manufactured separately can reduce the difficulty of manufacturing the buffer tank shell 1 and reduce the cost during manufacturing.

[0018] The working process of the hydrogen outlet and water buffer device of the fuel cell system of the embodiment of the utility model is as follows: the hydrogen outlet and water generated during the operation of the fuel cell system first enter the inner cavity of the buffer tank shell 1 through the water inlet 2. Since an inlet buffer plate 9 is provided in the outlet direction of the water inlet 2, the impact of the water flow on the inside of the buffer tank shell 1 can be effectively reduced. During this process, the water outlet 3 is closed; after a period of time, the solenoid valve 5 provided at the water outlet 3 is controlled to open, and the solenoid valve 5 at the water inlet 2 is closed, and the water in the buffer tank shell 1 is discharged through the water outlet 3;

[0019] In the above working process, the buffer tank shell 1 can temporarily store water and buffer, thereby preventing the pressure in the fuel cell system from changing dramatically in a short time while achieving hydrogen drainage, so as to ensure the stability of its operation;

[0020] If a vehicle equipped with a fuel cell system operates in a low-temperature environment, the temperature sensor 8 provided in the device will detect the specific value of the current temperature. If the temperature is below 0°C for a long time, the control system will control the electric heating layer 6 to be energized, and the electric heating layer 6 will generate heat to prevent the water flowing through the solenoid valve seat 4 from freezing due to the low temperature, thereby ensuring that the fuel cell system can perform hydrogen drainage operations normally.

Claims

1. A hydrogen outlet and drainage buffer device for a fuel cell system, characterized in that: The device comprises a buffer tank shell (1), wherein two ends of the buffer tank shell (1) are respectively provided with a water inlet (2) and a water outlet (3), and the water inlet (2) and the water outlet (3) are respectively located at two ends of an upper diagonal line of a rectangle formed by a longitudinal section of the buffer tank shell (1), and an electromagnetic valve seat (4) is also provided on the buffer tank shell (1) outside the water inlet (2) and the water outlet (3). The solenoid valve seat (4) is provided with a solenoid valve (5), and the surface of the solenoid valve seat (4) is also provided with an electric heating layer (6), the electric heating layer (6) is fixedly connected to the solenoid valve seat (4) via a pressing plate (7), and a temperature sensor (8) is also provided on the pressing plate (7). An inlet buffer plate (9) and an outlet buffer plate (10) are arranged in the buffer tank shell (1); the inlet buffer plate (9) and the outlet buffer plate (10) are both distributed along the length direction of the buffer tank shell (1); the inlet buffer plate (9) is located below the water inlet (2), and the outlet buffer plate (10) is located above the water outlet (3).

2. The hydrogen outlet and discharge buffer device of the fuel cell system according to claim 1, characterized in that: The buffer tank shell (1) is formed by two half shells (11) spliced ​​together, and a sealing ring (12) is provided between the two half shells (11).

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