Fuel cell high and low temperature testing device

Abstract

The invention discloses a fuel cell high and low temperature testing device which is characterized in that the testing device comprises an outlet header pipe (2) connected to a thermal management outlet end of a fuel cell (1), and a circulating pump (3) is further arranged on the outlet header pipe (2); the outlet header pipe (2) is connected with a first constant-temperature cold source (6) and a second constant-temperature cold source (7) through a first cold water outlet pipeline (4) and a second cold water outlet pipeline (5) respectively, and electromagnetic valves (8) are arranged on the first cold water outlet pipeline (4) and the second cold water outlet pipeline (5) respectively. The outlet header pipe (2) is connected with a first constant-temperature heat source (18) and a second constant-temperature heat source (19) through a first hot water outlet pipeline (16) and a second hot water outlet pipeline (17) respectively, and electromagnetic valves (8) are arranged on the first hot water outlet pipeline (16) and the second hot water outlet pipeline (17) respectively.

Description

Technical Field

[0001] The present invention relates to the field of new energy, and in particular to a high and low temperature testing device for a fuel cell. Background Art

[0002] Hydrogen fuel cells are devices that convert the chemical energy in hydrogen into electrical energy. Because their product is water, they are environmentally friendly and have been widely used in automobiles, ships, and other fields. With the increasing use of hydrogen fuel cells, their safety is receiving increasing attention.

[0003] As a key safety factor for fuel cells, high and low temperature performance has become a crucial aspect of fuel cell development and testing. Currently, high and low temperature testing of fuel cell systems is primarily conducted in environmental chambers or actual high and low temperature environments. The specific testing process involves placing the fuel cell in a sealed, insulated housing (or environment) connected to a cooling and heating device. These devices are used to change the temperature of the fuel cell's environment, thereby enabling stress testing of the fuel cell stack's high and low temperature material seals. However, this traditional testing method changes temperature slowly when switching between high and low temperature environments, especially when the temperature difference between high and low temperatures is large. However, in real environments, the temperature of fuel cells changes very quickly (for example, when a vehicle is started in a low-temperature environment, the temperature of the fuel cell will quickly rise from a low temperature to a higher temperature). In other words, traditional testing equipment cannot simulate real conditions, so it has significant limitations and the validity of the measurement results is questionable. In addition, due to the slow temperature change, the testing process is prolonged and the testing efficiency is relatively low.

[0004] Therefore, a method or device that can solve the above problems is needed. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned deficiencies in the prior art and proposes a fuel cell high and low temperature test device with simple structure, ingenious design, reasonable layout, and the ability to greatly increase the test temperature change speed, thereby better simulating the real environment. The technical solution of the present invention is: a high and low temperature test device for a fuel cell, characterized in that: the test device comprises an outlet manifold 2 connected to the thermal management outlet end of the fuel cell 1, and a circulation pump 3 is also provided on the outlet manifold 2. The outlet main pipe 2 is connected to the first constant temperature cold source 6 and the second constant temperature cold source 7 through the first cold water outlet pipe 4 and the second cold water outlet pipe 5, respectively, and a solenoid valve 8 is provided on the first cold water outlet pipe 4 and the second cold water outlet pipe 5. The outlet ends of the first constant temperature cold source 6 and the second constant temperature cold source 7 are respectively connected to the first cold water return pipe 9 and the second cold water return pipe 10, and the first cold water return pipe 9 and the second cold water return pipe 10 are also respectively connected to the inlet end of the intermediate constant temperature cold source tank 13 through the first cold water branch 11 and the second cold water branch 12, and the outlet end of the intermediate constant temperature cold source tank 13 is connected to the cold source tank return pipe 14, the first cold water return pipe 9, the second cold water return pipe 10 and the cold source tank return pipe 14 are all provided with a solenoid valve 8, and they are all connected to the return water main 15, and the other end of the return water main 15 is connected to the hot pipe inlet end of the fuel cell 1, and the first cold water branch 11 and the second cold water branch 12 are also provided with a solenoid valve 8, The outlet main pipe 2 is connected to the first constant temperature heat source 18 and the second constant temperature heat source 19 through the first hot water outlet pipe 16 and the second hot water outlet pipe 17 respectively, and the first hot water outlet pipe 16 and the second hot water outlet pipe 17 are both provided with a solenoid valve 8. The outlet ends of the first constant temperature heat source 18 and the second constant temperature heat source 19 are respectively connected to the first hot water return pipe 20 and the second hot water return pipe 21, and the first hot water return pipe 20 and the second hot water return pipe 21 are also connected to the inlet end of the intermediate constant temperature heat source storage tank (24) through the first hot water branch 22 and the second hot water branch 23, and the outlet end of the intermediate constant temperature heat source storage tank 24 is connected to the heat source storage tank return pipe 25. The first hot water return pipe 20, the second hot water return pipe 21 and the heat source storage tank return pipe 25 are all provided with a solenoid valve 8. At the same time, they are all connected to the return main pipe 15. The first hot water branch 22 and the second hot water branch 23 are also provided with a solenoid valve 8. Temperature sensors 26 are provided on the first cold water return pipeline 9 , the second cold water return pipeline 10 , the cold source storage tank return pipeline 14 , the first hot water return pipeline 20 , the second hot water return pipeline 21 and the heat source storage tank return pipeline 25 .

[0006] The first constant temperature cold source 6 includes a cold source storage tank 27. The shell inner cavity of the cold source storage tank 27 is connected to the first cold water outlet pipe 4 and the first cold water return pipe 9 respectively. A heat exchange pipe is provided in the cold source storage tank 27. The heat exchange pipe is connected to the refrigerator 28 through a circulation pipe. The structure of the second constant temperature cold source 7 is the same as that of the first constant temperature cold source 6 .

[0007] The first constant temperature heat source 18 includes a heat source storage tank 29. The inner cavity of the shell of the heat source storage tank 29 is connected to the first hot water outlet pipe 16 and the first hot water return pipe 20 respectively. A heat exchange pipe is provided in the heat source storage tank 29. The heat exchange pipe is connected to the heater 30 and the radiator 31 through a circulation pipe. The structure of the second constant temperature heat source 19 is the same as that of the first constant temperature heat source 18 .

[0008] Compared with the prior art, the present invention has the following advantages: This fuel cell high- and low-temperature testing device features a simple structure, ingenious design, and rational layout. It addresses the challenges of traditional fuel cell high- and low-temperature testing by employing a unique design. It incorporates two constant-temperature cooling sources and two constant-temperature heating sources within a piping system. These sources can independently provide cooling or heating to the fuel cell, allowing the fuel cell to maintain a desired temperature environment for extended periods of time. Furthermore, an intermediate constant-temperature cooling source tank allows for mixing cooling from the two cooling sources (and the heat source) to quickly adjust to a third temperature. In other words, the device can test fuel cells at three different cooling and heating temperatures by controlling valves in each piping system. The switching time between each temperature is extremely short, effectively improving efficiency and saving energy. Furthermore, the short switching time allows the device to simulate the temperature variations experienced by fuel cells in real operating environments, resulting in more accurate test results. Furthermore, this fuel cell high- and low-temperature testing device boasts a simple manufacturing process and low manufacturing cost, offering numerous advantages and making it particularly suitable for widespread application in this field, with a promising market prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a system composition block diagram of an embodiment of the present invention.

[0010] Figure 2 It is a structural schematic diagram of the constant temperature cold source part in an embodiment of the present invention.

[0011] Figure 3 It is a structural schematic diagram of the constant temperature heat source part in an embodiment of the present invention. DETAILED DESCRIPTION

[0012] The specific embodiments of the present invention will be described below with reference to the accompanying drawings. Figures 1 to 3 As shown: A fuel cell high and low temperature test device, which includes an outlet manifold 2 connected to the thermal management outlet end of the fuel cell 1, and a circulation pump 3 is also provided on the outlet manifold 2. The outlet main pipe 2 is connected to the first constant temperature cold source 6 and the second constant temperature cold source 7 through the first cold water outlet pipe 4 and the second cold water outlet pipe 5, respectively, and a solenoid valve 8 is provided on the first cold water outlet pipe 4 and the second cold water outlet pipe 5. The outlet ends of the first constant temperature cold source 6 and the second constant temperature cold source 7 are respectively connected to the first cold water return pipe 9 and the second cold water return pipe 10, and the first cold water return pipe 9 and the second cold water return pipe 10 are also respectively connected to the inlet end of the intermediate constant temperature cold source tank 13 through the first cold water branch 11 and the second cold water branch 12, and the outlet end of the intermediate constant temperature cold source tank 13 is connected to the cold source tank return pipe 14, the first cold water return pipe 9, the second cold water return pipe 10 and the cold source tank return pipe 14 are all provided with a solenoid valve 8, and they are all connected to the return water main 15, and the other end of the return water main 15 is connected to the hot pipe inlet end of the fuel cell 1, and the first cold water branch 11 and the second cold water branch 12 are also provided with a solenoid valve 8, The outlet main pipe 2 is connected to the first constant temperature heat source 18 and the second constant temperature heat source 19 through the first hot water outlet pipe 16 and the second hot water outlet pipe 17 respectively, and the first hot water outlet pipe 16 and the second hot water outlet pipe 17 are both provided with a solenoid valve 8. The outlet ends of the first constant temperature heat source 18 and the second constant temperature heat source 19 are respectively connected to the first hot water return pipe 20 and the second hot water return pipe 21, and the first hot water return pipe 20 and the second hot water return pipe 21 are also connected to the inlet end of the intermediate constant temperature heat source storage tank (24) through the first hot water branch 22 and the second hot water branch 23, and the outlet end of the intermediate constant temperature heat source storage tank 24 is connected to the heat source storage tank return pipe 25. The first hot water return pipe 20, the second hot water return pipe 21 and the heat source storage tank return pipe 25 are all provided with a solenoid valve 8. At the same time, they are all connected to the return main pipe 15. The first hot water branch 22 and the second hot water branch 23 are also provided with a solenoid valve 8. Temperature sensors 26 are provided on the first cold water return pipeline 9 , the second cold water return pipeline 10 , the cold source storage tank return pipeline 14 , the first hot water return pipeline 20 , the second hot water return pipeline 21 and the heat source storage tank return pipeline 25 .

[0013] The first constant temperature cold source 6 includes a cold source storage tank 27. The shell inner cavity of the cold source storage tank 27 is connected to the first cold water outlet pipe 4 and the first cold water return pipe 9 respectively. A heat exchange pipe is provided in the cold source storage tank 27. The heat exchange pipe is connected to the refrigerator 28 through a circulation pipe. The structure of the second constant temperature cold source 7 is the same as that of the first constant temperature cold source 6 .

[0014] The first constant temperature heat source 18 includes a heat source storage tank 29. The inner cavity of the shell of the heat source storage tank 29 is connected to the first hot water outlet pipe 16 and the first hot water return pipe 20 respectively. A heat exchange pipe is provided in the heat source storage tank 29. The heat exchange pipe is connected to the heater 30 and the radiator 31 through a circulation pipe. The structure of the second constant temperature heat source 19 is the same as that of the first constant temperature heat source 18 .

[0015] The working process of the high and low temperature test device of the fuel cell according to the embodiment of the present invention is as follows: the temperature of the medium in the first constant temperature cold source 6 is a low temperature T1, the temperature of the medium in the second constant temperature cold source 7 is a low temperature T2, the temperature of the medium in the first constant temperature heat source 18 is a high temperature T1, and the temperature of the medium in the second constant temperature heat source 19 is a high temperature T2; When it is necessary to perform a high and low temperature test on the fuel cell 1, a command is sent to the control system, which controls the circulation pump 3 to operate and opens the solenoid valves 8 on the first cold water outlet pipe 4 and the first cold water return pipe 9. The medium at low temperature T1 enters the fuel cell 1 through the pipes, creating a low temperature environment at temperature T1. Similarly, when the solenoid valve 8 is closed and the solenoid valves of the second cold water outlet pipe 5 and the second cold water return pipe 10 are opened, the medium of low temperature T2 enters the fuel cell 1 through the pipes, creating a low temperature environment of temperature T2; Moreover, when the solenoid valve 8 is closed, and the solenoid valves 8 on the first cold water outlet pipe 4 and the second cold water outlet pipe 5 are opened, the solenoid valves 8 on the first cold water branch 11 and the second cold water branch 12 are opened, and the solenoid valve on the intermediate constant temperature cold source storage tank 13 is opened, the low-temperature medium in the first constant temperature cold source 6 and the second constant temperature cold source 7 first enters the intermediate constant temperature cold source storage tank 13 for mixing, and quickly obtains a low-temperature medium with a temperature between T1 and T2 (temperature T3), and the medium at low temperature T3 enters the fuel cell 1 through the pipeline, creating a low-temperature environment with a temperature of T3; When the fuel cell 1 needs to be placed in a high-temperature environment, a command is issued to the control system, and the solenoid valves 8 on all the pipelines carrying the low-temperature medium are opened, while the solenoid valves 8 on the high-temperature side pipelines operate according to a process similar to the above description, thereby creating a high-temperature environment inside the fuel cell 1 with temperatures of T1, T2 and T3 (where the temperature of T3 is between T1 and T2).

[0016] During the above process, the temperature sensors 26 provided on each pipeline can monitor the temperature of the medium flowing in each pipeline in real time, so that the control system can control whether the device is in a normal working state.

Claims

1. A fuel cell high and low temperature testing device, characterized by: The test device comprises an outlet manifold (2) connected to the thermal management outlet end of the fuel cell (1), and a circulation pump (3) is also provided on the outlet manifold (2). The outlet main pipe (2) is connected to the first constant temperature cold source (6) and the second constant temperature cold source (7) through the first cold water outlet pipe (4) and the second cold water outlet pipe (5), respectively, and a solenoid valve (8) is provided on each of the first cold water outlet pipe (4) and the second cold water outlet pipe (5). The outlet ends of the first constant temperature cold source (6) and the second constant temperature cold source (7) are connected to the first cold water return pipe (9) and the second cold water return pipe (10), respectively. The first cold water return pipe (9) and the second cold water return pipe (10) are also connected to the inlet end of the intermediate constant temperature cold source storage tank (13) through the first cold water branch (11) and the second cold water branch (12), respectively. The outlet end of the intermediate constant temperature cold source storage tank (13) is connected to the cold source storage tank return pipe (14). The first cold water return pipe (9), the second cold water return pipe (10) and the cold source storage tank return pipe (14) are all provided with electromagnetic valves (8). At the same time, they are all connected to the return water main pipe (15). The other end of the return water main pipe (15) is connected to the inlet end of the heat pipe of the fuel cell (1). The first cold water branch (11) and the second cold water branch (12) are also provided with electromagnetic valves (8). The outlet main pipe (2) is connected to a first constant temperature heat source (18) and a second constant temperature heat source (19) through a first hot water outlet pipe (16) and a second hot water outlet pipe (17), respectively, and a solenoid valve (8) is provided on each of the first hot water outlet pipe (16) and the second hot water outlet pipe (17). The outlet ends of the first constant temperature heat source (18) and the second constant temperature heat source (19) are connected to the first hot water return pipe (20) and the second hot water return pipe (21), respectively. The first hot water return pipe (20) and the second hot water return pipe (21) are also connected to the inlet end of the intermediate constant temperature heat source storage tank (24) through the first hot water branch (22) and the second hot water branch (23), respectively. The outlet end of the intermediate constant temperature heat source storage tank (24) is connected to the heat source storage tank return pipe (25). The first hot water return pipe (20), the second hot water return pipe (21) and the heat source storage tank return pipe (25) are all provided with electromagnetic valves (8). At the same time, they are all connected to the return water main pipe (15). Electromagnetic valves (8) are also provided on the first hot water branch (22) and the second hot water branch (23). Temperature sensors (26) are provided on the first cold water return pipeline (9), the second cold water return pipeline (10), the cold source storage tank return pipeline (14), the first hot water return pipeline (20), the second hot water return pipeline (21), and the heat source storage tank return pipeline (25).

2. The high and low temperature test device for fuel cells according to claim 1, characterized in that: The first constant temperature cold source (6) includes a cold source storage tank (27), the shell inner cavity of the cold source storage tank (27) is connected to the first cold water outlet pipe (4) and the first cold water return pipe (9), respectively. A heat exchange pipe is provided in the cold source storage tank (27), and the heat exchange pipe is connected to the refrigerator (28) through a circulation pipe. The structure of the second constant temperature cold source (7) is the same as that of the first constant temperature cold source (6).

3. The high and low temperature testing device for fuel cells according to claim 1, characterized in that: The first constant temperature heat source (18) includes a heat source storage tank (29), the shell inner cavity of the heat source storage tank (29) is connected to the first hot water outlet pipe (16) and the first hot water return pipe (20), respectively. A heat exchange pipe is provided in the heat source storage tank (29), and the heat exchange pipe is connected to the heater (30) and the radiator (31) through a circulation pipe. The structure of the second constant temperature heat source (19) is the same as that of the first constant temperature heat source (18).

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