Fuel cell stack test bench

Abstract

The utility model relates to the technical field of fuel cells, and particularly provides a fuel cell stack test board. The fuel cell stack test board comprises a water storage tank, a circulating water pump, a to-be-tested stack, a heating assembly, a multi-channel flow regulating valve and a heat dissipation assembly, wherein a water outlet of the circulating water pump is connected with a water inlet of the to-be-tested stack; a water inlet of the circulating water pump is connected with a water outlet of the water storage tank; a first water outlet of the multi-channel flow regulating valve is connected with a water inlet of the heating assembly; a second water outlet of the multi-channel flow regulating valve is connected with a water inlet of the heat dissipation assembly; a water inlet of the multi-channel flow regulating valve is connected with a water outlet of the galvanic pile to be tested; a water inlet of the water storage tank is connected with water outlets of the heating assembly and the heat dissipation assembly. In the fuel cell stack test board, the temperature of the fuel cell stack can be conveniently and quickly adjusted by adjusting the flow of the first water outlet and the second water outlet of the multi-channel flow adjusting valve, and the problems in the prior art are solved.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell technology, specifically to a fuel cell stack test bench. Background Technology

[0002] Fuel cells, especially proton exchange membrane fuel cells (PEMFCs), have been widely used in applications such as fuel cell electric vehicles and fuel cell backup power supplies due to their advantages of being pollution-free, having high specific energy, low noise, and high energy conversion efficiency.

[0003] As the core component of a fuel cell, the fuel cell stack is the device in the fuel cell where electrochemical reactions occur, thereby realizing energy conversion. Research has found that the temperature of the fuel cell stack has a significant impact on its performance. Therefore, testing the performance of the fuel cell stack under various temperature conditions is particularly important during the testing process. This places demands on the temperature control performance of the fuel cell stack test bench, requiring a test bench that can conveniently and quickly adjust the temperature of the fuel cell stack. Utility Model Content

[0004] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a fuel cell stack test bench, which aims to solve the technical problems in the related technology to a certain extent.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This application provides a fuel cell stack test bench, including: a water storage tank, a circulating water pump, a fuel cell stack under test, a heating assembly, a multi-channel flow regulating valve, and a heat dissipation assembly, wherein:

[0007] The outlet of the circulating water pump is connected to the inlet of the fuel cell stack under test;

[0008] The inlet of the circulating water pump is connected to the outlet of the water storage tank;

[0009] The first outlet of the multi-channel flow regulating valve is connected to the inlet of the heating component;

[0010] The second outlet of the multi-channel flow regulating valve is connected to the inlet of the heat dissipation component;

[0011] The inlet of the multi-channel flow regulating valve is connected to the outlet of the fuel cell stack under test;

[0012] The inlet of the water storage tank is connected to the outlet of the heating component and the heat dissipation component.

[0013] Preferably, the connecting pipe between the outlet of the circulating water pump and the inlet of the fuel cell stack under test is equipped with a water purification component.

[0014] Preferably, the water purification component includes a deionizer and a particulate filter, wherein the deionizer and the particulate filter are connected in series or in parallel.

[0015] Preferably, the heat dissipation assembly includes a radiator and a heat exchanger, wherein the radiator and the heat exchanger are connected in parallel.

[0016] Preferably, the multi-channel flow regulating valve is a four-way valve, wherein:

[0017] The first outlet of the four-way valve is connected to the inlet of the heating assembly;

[0018] The second outlet of the four-way valve is connected to the inlet of the radiator.

[0019] The third outlet of the four-way valve is connected to the inlet of the heat exchanger.

[0020] Preferably, the water storage tank is equipped with a temperature sensor.

[0021] Preferably, the inlet of the fuel cell stack under test is equipped with a flow detector.

[0022] Preferably, the fuel cell stack test bench further includes a controller, the controller comprising:

[0023] A temperature reading unit connected to the temperature sensor; and,

[0024] An outlet opening control unit is used to control the opening degree of the first and second outlets of the multi-channel flow regulating valve based on the actual temperature read by the temperature reading unit.

[0025] Preferably, an air vent valve is provided on the top of the water storage tank or on the side wall near the top; and / or,

[0026] A drain valve is provided at the bottom of the water storage tank or on the side wall near the bottom.

[0027] Preferably, the water storage tank is equipped with a second heating component.

[0028] Based on the above technical solution, the advantages of this utility model compared with the prior art are as follows:

[0029] The fuel cell stack test bench provided in this application includes a water storage tank, a circulating water pump, a fuel cell stack under test (FCD), a heating assembly, a multi-channel flow regulating valve, and a heat dissipation assembly. The outlet of the circulating water pump is connected to the inlet of the FCD; the inlet of the circulating water pump is connected to the outlet of the water storage tank; the first outlet of the multi-channel flow regulating valve is connected to the inlet of the heating assembly; the second outlet of the multi-channel flow regulating valve is connected to the inlet of the heat dissipation assembly; the inlet of the multi-channel flow regulating valve is connected to the outlet of the FCD; and the inlet of the water storage tank is connected to the outlets of both the heating assembly and the heat dissipation assembly. By adjusting the flow rates of the first and second outlets of the multi-channel flow regulating valve, the flow rates into the heating assembly and the heat dissipation assembly can be controlled, thereby regulating the water temperature flowing into the water storage tank and controlling the water temperature within the tank. Since the circulating water pump draws water from the water storage tank and pumps it into the FCD, it can also control the temperature of the water entering the stack, thus controlling the temperature of the FCD. Therefore, in this fuel cell stack test bench, the temperature of the fuel cell stack can be conveniently and quickly adjusted by regulating the flow rates of the first and second outlets of the multi-channel flow regulating valve, thus solving the problems in the prior art. Attached Figure Description

[0030] Figure 1 The diagram below shows the specific structure of the fuel cell stack test bench provided in this application.

[0031] In the above diagram: 1-Water storage tank; 2-Circulating water pump; 3-Test stack; 4-Heating component; 5-Multi-channel flow regulating valve; 6-Heat dissipation component; 61-Radiator; 62-Heat exchanger; 7-Water purification component; 71-Deionizer; 72-Particle filter. Detailed Implementation

[0032] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0033] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0034] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] As mentioned earlier, the temperature of the fuel cell stack has a significant impact on its performance. Therefore, it is particularly important to test the performance of the fuel cell stack under various temperature conditions during the testing process. This requires the fuel cell stack test bench to be able to adjust the temperature of the fuel cell stack conveniently and quickly, thus placing demands on the temperature control performance of the fuel cell stack test bench.

[0036] See Figure 1 The diagram shown is a schematic representation of the specific structure of a fuel cell stack test bench provided in this embodiment of the application. The fuel cell stack test bench includes a water storage tank 1, a circulating water pump 2, a fuel cell stack under test 3, a heating assembly 4, a multi-channel flow regulating valve 5, and a heat dissipation assembly 6. The connections between these components are as follows:

[0037] The outlet of the circulating water pump 2 is connected to the inlet of the fuel cell stack 3 under test;

[0038] The inlet of the circulating water pump 2 is connected to the outlet of the water storage tank 1;

[0039] The first outlet of the multi-channel flow regulating valve 5 is connected to the inlet of the heating component 4;

[0040] The second outlet of the multi-channel flow regulating valve 5 is connected to the inlet of the heat dissipation component 6;

[0041] The inlet of the multi-channel flow regulating valve 5 is connected to the outlet of the fuel cell stack 3 under test;

[0042] The inlet of the water storage tank 1 is connected to the outlet of the heating component 4 and the heat dissipation component 6.

[0043] Based on the aforementioned connection relationships between the various components, the fuel cell stack test bench has a water storage tank 1 that can store coolant (usually water). The water circulation is as follows: the circulating water pump 2 pumps the water in the water storage tank 1 into the fuel cell stack 3 under test. The water in the fuel cell stack 3 under test (including the water generated by the reaction and the pumped water) flows out from the outlet and is further regulated by the multi-channel flow regulating valve 5. According to the regulated flow rate, the water flows out from the first outlet and the second outlet respectively. The water flowing out from the first outlet flows into the heating component 4 for heating, while the water flowing out from the second outlet flows into the heat dissipation component 6 for heat dissipation. The water heated by the heating component 4 and the water dissipated by the heat dissipation component 6 flow back into the water storage tank 1 through the inlet of the water storage tank 1, thus forming a water circulation.

[0044] It is important to note that during this water circulation process, the multi-channel flow regulating valve 5 can regulate the flow rate of the first and second outlets, thereby controlling the flow rate into the heating component 4 and the heat dissipation component 6 respectively. This allows for the regulation of the water temperature flowing into the storage tank 1, thus controlling the water temperature in the storage tank 1. Since the circulating water pump 2 pumps water from the storage tank 1 into the test stack 3, it can also control the temperature of the water entering the stack, thereby controlling the temperature of the test stack 3.

[0045] For example, when the temperature of the test stack 3 is high, the flow rate at the first outlet can be reduced and the flow rate at the second outlet can be increased by adjusting the multi-channel flow regulating valve 5. This reduces the flow rate of water flowing into the heating component 4 and increases the flow rate of water flowing into the heat dissipation component 6. Overall, this improves the heat dissipation effect and reduces the heating effect, thereby lowering the temperature of the water flowing into the water storage tank 1, which in turn lowers the temperature of the water in the water storage tank 1, and further reduces the temperature of the water pumped into the test stack 3 by the circulating water pump 2.

[0046] Conversely, when the temperature of the test stack 3 is low, the flow rate at its first outlet can be increased and the flow rate at the second outlet can be decreased by adjusting the multi-channel flow regulating valve 5. This increases the flow rate of water flowing into the heating component 4 and decreases the flow rate of water flowing into the heat dissipation component 6. Overall, this reduces the heat dissipation effect and increases the heating effect, thereby raising the temperature of the water flowing into the water storage tank 1, which in turn raises the temperature of the water in the water storage tank 1, and further raises the temperature of the water pumped into the test stack 3 by the circulating water pump 2.

[0047] Therefore, the fuel cell stack test bench provided in this application embodiment includes a water tank 1, a circulating water pump 2, a fuel cell stack under test 3, a heating assembly 4, a multi-channel flow regulating valve 5, and a heat dissipation assembly 6. The outlet of the circulating water pump 2 is connected to the inlet of the fuel cell stack under test 3; the inlet of the circulating water pump 2 is connected to the outlet of the water tank 1; the first outlet of the multi-channel flow regulating valve 5 is connected to the inlet of the heating assembly 4; the second outlet of the multi-channel flow regulating valve 5 is connected to the inlet of the heat dissipation assembly 6; the inlet of the multi-channel flow regulating valve 5 is connected to the outlet of the fuel cell stack under test 3; and the inlet of the water tank 1 is connected to the outlets of the heating assembly 4 and the heat dissipation assembly 6. At this point, the flow rates flowing into the heating component 4 and the heat dissipation component 6 can be controlled by adjusting the flow rates at the first and second outlets of the multi-channel flow regulating valve 5, thereby regulating the water temperature flowing into the storage tank 1 and controlling the water temperature within the storage tank 1. Since the circulating water pump 2 draws water from the storage tank 1 and pumps it into the fuel cell stack 3 under test, the temperature of the water entering the stack can also be controlled, thereby controlling the temperature of the fuel cell stack 3 under test. Therefore, in this fuel cell stack test bench, the temperature of the fuel cell stack can be conveniently and quickly adjusted by regulating the flow rates at the first and second outlets of the multi-channel flow regulating valve 5, solving the problems in the prior art.

[0048] In practical applications, to improve safety, an air vent valve can usually be installed on the top of the water storage tank 1 or on the side wall near the top. For example, if the pressure inside the water storage tank 1 is too high, the air vent valve can be opened to release the pressure inside the water storage tank 1.

[0049] Of course, since the electrochemical reaction carried out by the fuel cell itself will also produce a certain amount of water, in order to prevent the water in the water storage tank 1 from being too much, a drain valve can be installed at the bottom of the water storage tank 1 or on the side wall near the bottom of the water storage tank 1, so that the water can be drained through the drain valve when needed.

[0050] In addition, a second heating component can be installed in the water storage tank 1. In this way, if the water temperature in the water storage tank 1 is too low, the water in the water storage tank 1 can be heated by the second heating component. The second heating component and the heating component 4 can be heating rods or heating plates, etc.

[0051] In practical applications, in order to improve the safety of fuel cell stacks, it is necessary to purify the water entering the stack. Therefore, a water purification component 7 can be installed in the connecting pipe between the outlet of the circulating water pump 2 and the inlet of the fuel cell stack 3 under test, so that the water entering the fuel cell stack 3 under test can be purified by the water purification component 7.

[0052] The water purification component 7 may include a deionizer 71 and a particulate filter 72. The deionizer 71 and the particulate filter 72 may be connected in series or in parallel. Figure 1 The two are connected in parallel. The deionizer 71 can remove metal ions, ammonium ions, sulfate ions, nitrate ions, etc. from the water, while the particulate filter 72 can filter various particles from the water.

[0053] It should be further explained that, in practical applications, the heat dissipation component 6 may specifically include a radiator 61 and a heat exchanger 62. The radiator 61 and the heat exchanger 62 may be connected in parallel. In this way, part of the water flowing out of the second outlet of the multi-channel flow regulating valve 5 will flow into the heat exchanger 62, thereby recovering waste heat through heat exchange. Of course, the coolant flow channel of the heat exchanger 62 may also be circulated with a lower temperature coolant, thereby further increasing the heat loss of the heat exchanger 62 and further reducing the water temperature flowing into the water storage tank 1.

[0054] In the case where the heat dissipation component 6 specifically includes a radiator 61 and a heat exchanger 62, in order to further improve the accuracy of control, the multi-channel flow regulating valve 5 can be specifically a four-way valve, wherein: the first outlet of the four-way valve is connected to the inlet of the heating component 4, the second outlet of the four-way valve is connected to the inlet of the radiator 61, and the third outlet of the four-way valve is connected to the inlet of the heat exchanger 62, thereby enabling more accurate control of the flow rate of the three outlets of the four-way valve, and thus more precise control of the water temperature.

[0055] It should be further explained that in order to achieve remote or automated control of the multi-channel flow regulating valve 5, it is usually necessary to collect the temperature of the water in the water storage tank 1 and the flow rate of the water flowing into the test stack 3. Therefore, a temperature sensor can be further installed in the water storage tank 1 to collect the water temperature in the water storage tank 1, and a flow detector can be installed at the water inlet of the test stack 3 to detect the flow rate of the water flowing into the test stack 3.

[0056] In the process of remote or automated control (i.e., during the operation of the fuel cell stack test bench), the power of the circulating water pump 2 can be controlled first, so that the flow detector detects that the water flow into the fuel cell stack 3 under test reaches the preset flow rate. Then, the actual temperature detected by the temperature sensor can be acquired in real time or periodically. This actual temperature is the water temperature in the storage tank 1. Based on this actual temperature, the opening degree of the first and second outlets in the multi-channel flow regulating valve 5 can be controlled. For example, if the actual temperature is higher than the preset temperature, PID control or other control methods can be used to control the opening degree of the first outlet to decrease and the opening degree of the second outlet to increase, thereby reducing the heating effect and improving the heat dissipation effect, and thus reducing the temperature of the water entering the storage tank 1. Conversely, if the actual temperature is lower than the preset temperature, PID control or other control methods can be used to control the opening degree of the first outlet to increase and the opening degree of the second outlet to decrease, thereby improving the heating effect and reducing the heat dissipation effect, and thus increasing the temperature of the water entering the storage tank 1.

[0057] Based on this control principle, the fuel cell stack test bench provided in this application embodiment may further include a controller, which may include a temperature reading unit and an outlet opening control unit. The temperature reading unit may be connected to a temperature sensor in the water storage tank 1, thereby enabling it to read the actual temperature detected by the temperature sensor in real time or periodically. Furthermore, the outlet opening control unit may control the opening of the first and second outlets of the multi-channel flow regulating valve 5 based on the actual temperature read by the temperature reading unit and the above-mentioned control principle.

[0058] This utility model is not limited to the above-described embodiments. For those skilled in the art, various improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model. Contents not described in detail in this specification are prior art known to those skilled in the art.

Claims

1. A fuel cell stack test stand, characterized by, The fuel cell stack test bench comprises a water storage tank (1), a circulating water pump (2), a to-be-tested stack (3), a heating assembly (4), a multi-path flow regulating valve (5) and a heat dissipation assembly (6), wherein: the water outlet of the circulating water pump (2) is connected to the water inlet of the to-be-tested stack (3); the water inlet of the circulating water pump (2) is connected to the water outlet of the water storage tank (1); the first water outlet of the multi-path flow regulating valve (5) is connected to the water inlet of the heating assembly (4); the second water outlet of the multi-path flow regulating valve (5) is connected to the water inlet of the heat dissipation assembly (6); the water inlet of the multi-path flow regulating valve (5) is connected to the water outlet of the to-be-tested stack (3); the water inlets of the heating assembly (4) and the heat dissipation assembly (6) are connected to the water outlet of the water storage tank (1). A connecting pipeline between the water outlet of the circulating water pump (2) and the water inlet of the to-be-tested stack (3) is provided with a water purification assembly (7).

2. The fuel cell stack test stand of claim 1, wherein, The water purification assembly (7) comprises a deionizer (71) and a particle filter (72), wherein the deionizer (71) and the particle filter (72) are connected in series or in parallel.

3. The fuel cell stack test stand of claim 2, wherein, The heat dissipation assembly (6) comprises a radiator (61) and a heat exchanger (62), wherein the radiator (61) and the heat exchanger (62) are connected in parallel.

4. The fuel cell stack test stand of claim 1, wherein, The multi-path flow regulating valve (5) is specifically a four-way valve, wherein:

5. The fuel cell stack test stand of claim 4, wherein, the first water outlet of the four-way valve is connected to the water inlet of the heating assembly (4); the second water outlet of the four-way valve is connected to the water inlet of the radiator (61); the third water outlet of the four-way valve is connected to the water inlet of the heat exchanger (62). The water storage tank (1) is provided with a temperature sensor.

6. The fuel cell stack test stand of claim 1, wherein, The water inlet of the to-be-tested stack (3) is provided with a flow detector.

7. The fuel cell stack test stand of claim 6, wherein, The fuel cell stack test bench further comprises a controller, which comprises:

8. The fuel cell stack test stand of claim 6, wherein, a temperature reading unit connected to the temperature sensor; and a water outlet opening degree control unit for controlling the opening degrees of the first and second water outlets of the multi-path flow regulating valve (5) according to the actual temperature read by the temperature reading unit.

9. The fuel cell stack test bench according to claim 1, wherein the top or the side wall close to the top of the water storage tank (1) is provided with an exhaust valve; and / or, the bottom or the side wall close to the bottom of the water storage tank (1) is provided with a drain valve.

10. The fuel cell stack test bench according to claim 1, wherein a second heating assembly is arranged in the water storage tank (1). ​

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