High-voltage testing device of solid oxide fuel cell and control method of high-voltage testing device

Abstract

The invention provides a high-pressure testing device of a solid oxide fuel cell and a control method of the high-pressure testing device, and relates to the technical field of solid oxide fuel cell testing, and the testing device comprises a heating furnace module and a gas supply and pressure control module. The heating furnace module comprises a containing furnace body and a heating furnace body. The gas supply and pressure control module comprises an air supply and pressure control assembly, a fuel gas supply and pressure control assembly and a nitrogen supply and pressure control assembly; the air supply and pressure control assembly comprises an air supply pipeline, an air discharge pipeline and a first backpressure regulating valve; the fuel gas supply and pressure control assembly comprises a fuel gas supply pipeline, a fuel gas discharge pipeline and a second backpressure regulating valve; and the nitrogen supply and pressure control assembly comprises a nitrogen supply pipeline, a nitrogen discharge pipeline and a third backpressure regulating valve. The high-voltage test device of the solid oxide fuel cell can avoid the problems of material damage, structure failure or leakage and the like, and can improve the test safety.

Description

Technical Field

[0001] The present application relates to the technical field of solid oxide fuel cell testing, and in particular to a high-voltage testing device for a solid oxide fuel cell and a control method thereof. Background Art

[0002] Solid oxide fuel cell (SOFC) belongs to the third generation of fuel cells. It is an all-solid-state chemical power generation device that directly converts the chemical energy stored in fuel and oxidant into electrical energy through electrochemistry and environmentally friendly at medium and high temperatures.

[0003] At present, in the relevant technology, for the relevant testing technology of solid oxide fuel cells, the testing is generally carried out under high temperature and normal pressure (or slightly higher than normal pressure) conditions. The main reasons are: first, under high pressure environment, the related components of the SOFC battery may have problems such as material damage, structural failure or leakage due to high pressure; second, since SOFC operates in a high temperature environment, if a high pressure environment is provided on the basis of high temperature, the high temperature and high pressure testing environment will further increase the risk of test operations (for example, gas leakage, explosion, etc.), making the SOFC testing process less safe.

[0004] However, in actual application, the stack efficiency and power output of SOFC will be better under higher pressure. In addition, when SOFC is combined with certain equipment (for example, turbines, etc.), SOFC may need to operate in a high-pressure environment. At present, the testing technology of SOFC under high-temperature and high-pressure operating conditions is still a technical gap. Summary of the invention

[0005] In order to solve the technical problems in the related art, the present application provides a high-pressure test device for a solid oxide fuel cell and a control method thereof. The high-pressure test device for a solid oxide fuel cell of the present application can not only effectively avoid the problems of material damage, structural failure or leakage of the related components of the solid oxide fuel cell due to high pressure under the high temperature and high pressure test environment, but also effectively avoid the test operation risks under the high temperature and high pressure test environment and improve the safety of the test; that is, the high-pressure test device for a solid oxide fuel cell of the present application can fill the technical gap of SOFC testing under high temperature and high pressure operating conditions in the existing related art.

[0006] In order to achieve the above objectives, the technical solutions adopted in this application include:

[0007] According to a first aspect of the present application, a high-pressure test device for a solid oxide fuel cell is provided, comprising a heating furnace module, a gas supply and pressure control module. The heating furnace module comprises a containing furnace body and a heating furnace body, wherein a containing cavity for containing the heating furnace body is formed in the containing furnace body, and a test cavity for containing the solid oxide fuel cell is formed in the heating furnace body.

[0008] The gas supply and pressure control module includes an air supply and pressure control component, a fuel gas supply and pressure control component and a nitrogen supply and pressure control component; the air supply and pressure control component includes an air supply pipeline, an air exhaust pipeline and a first back pressure regulating valve, the two ends of the air supply pipeline are respectively used to communicate with the air source and the solid oxide fuel cell, the first back pressure regulating valve is arranged on the air exhaust pipeline, and the two ends of the air exhaust pipeline are respectively used to communicate with the solid oxide fuel cell and the outside world; the fuel gas supply and pressure control component includes a fuel gas supply pipeline, a fuel gas exhaust pipeline and a second back pressure regulating valve, the two ends of the fuel gas supply pipeline are respectively used to communicate with the fuel gas source and the solid oxide fuel cell, the first back pressure regulating valve is arranged on the air exhaust pipeline, and the two ends of the air exhaust pipeline are respectively used to communicate with the solid oxide fuel cell and the outside world. The gas source is connected to the solid oxide fuel cell, the second back pressure regulating valve is arranged on the fuel gas exhaust pipeline, and the two ends of the fuel gas exhaust pipeline are respectively used to communicate with the solid oxide fuel cell and the outside world; the nitrogen supply and pressure control assembly includes a nitrogen supply pipeline, a nitrogen exhaust pipeline and a third back pressure regulating valve, one end of the nitrogen supply pipeline is used to communicate with the nitrogen source, and the other end of the nitrogen supply pipeline is respectively extended into the containing cavity and the test cavity, the third back pressure regulating valve is arranged on the nitrogen exhaust pipeline, and one end of the nitrogen exhaust pipeline is used to communicate with the outside world, and the other end of the nitrogen exhaust pipeline is respectively extended into the containing cavity and the test cavity;

[0009] Among them, the gas pressure P in the nitrogen supply pipeline N2 , the gas pressure P in the air supply pipeline Air and the gas pressure P in the fuel gas supply pipeline F Satisfaction: P N2 >P Air >P F , and P N2 , P Air and P F The maximum pressure difference is less than or equal to the preset threshold.

[0010] Optionally, the preset threshold is 20 mbar.

[0011] Optionally, the nitrogen supply pipeline includes a main pipeline, a first branch pipe, a second branch pipe and a third branch pipe, one end of the main pipeline is used to communicate with a nitrogen source, the other end of the main pipeline is respectively connected to the first branch pipe and the second branch pipe, one end of the first branch pipe away from the main pipeline extends into the accommodating cavity, one end of the second branch pipe away from the main pipeline extends into the test cavity, one end of the third branch pipe is connected to the second branch pipe, and the other end of the third branch pipe is connected to the fuel gas supply pipeline in an on-off manner.

[0012] Optionally, the nitrogen supply and pressure control assembly further includes a nitrogen intake solenoid valve, a first nitrogen mass flow controller, a second nitrogen mass flow controller, a nitrogen protection intake solenoid valve, a nitrogen pressurization intake solenoid valve, a first pressure sensor, a second pressure sensor and a third pressure sensor;

[0013] The nitrogen intake solenoid valve is arranged on the main pipeline;

[0014] The first nitrogen mass flow controller and the first pressure sensor are sequentially arranged on the first branch pipe along the flow direction of nitrogen;

[0015] The second nitrogen mass flow controller, the nitrogen pressurizing air intake solenoid valve and the second pressure sensor are sequentially arranged on the second branch pipe along the flow direction of the nitrogen, and the connecting point between the third branch pipe and the second branch pipe is located between the second nitrogen mass flow controller and the nitrogen pressurizing air intake solenoid valve;

[0016] The nitrogen protection air intake solenoid valve is arranged on the third branch pipe;

[0017] The third pressure sensor is disposed on the nitrogen exhaust pipeline and is located upstream of the third back pressure regulating valve.

[0018] Optionally, the high-pressure testing device for the solid oxide fuel cell also includes a pressure relief assembly, which includes a first pressure relief pipe, a fourth pressure sensor, a first pressure relief valve, a second pressure relief pipe, a fifth pressure sensor and a second pressure relief valve, both ends of the first pressure relief pipe are connected to the test chamber and the accommodating chamber respectively, the first pressure relief valve and the fourth pressure sensor are both arranged on the first pressure relief pipe and the first pressure relief valve is located downstream of the fourth pressure sensor, one end of the second pressure relief pipe is connected to the accommodating chamber, and the other end of the second pressure relief pipe is connected to the outside, the second pressure relief valve and the fifth pressure sensor are both arranged on the second pressure relief pipe, and the second pressure relief valve is located downstream of the fifth pressure sensor.

[0019] Optionally, the heating furnace module also includes a cooling component, which includes a cooling sleeve and a cooling water pipe. The cooling sleeve is wrapped around the furnace body, and a cooling cavity for containing cooling water is formed outside the cooling sleeve. One end of the cooling water pipe extends into the cooling cavity, and the other end of the cooling water pipe is used to connect to a cooling water source.

[0020] Optionally, the cooling assembly further includes a water inlet solenoid valve and a cooling water mass flow controller, wherein the water inlet solenoid valve and the cooling water mass flow controller are respectively arranged on the cooling water pipe, and the water inlet solenoid valve is located upstream of the cooling water mass flow controller.

[0021] Optionally, the air supply and pressure control component further includes an air intake solenoid valve, an air mass flow controller, a sixth pressure sensor and a seventh pressure sensor, wherein the air intake solenoid valve, the air mass flow controller and the sixth pressure sensor are sequentially arranged on the air supply pipe along the air flow direction, the seventh pressure sensor is arranged on the air exhaust pipe, and the seventh pressure sensor is located upstream of the first back pressure regulating valve; and / or,

[0022] The fuel gas supply and pressure control component also includes a fuel gas intake solenoid valve, a fuel gas mass flow controller, an eighth pressure sensor and a ninth pressure sensor. The fuel gas intake solenoid valve, the fuel gas mass flow controller and the eighth pressure sensor are sequentially arranged on the fuel gas supply pipeline along the flow direction of the fuel gas, the ninth pressure sensor is arranged on the fuel gas exhaust pipeline, and the ninth pressure sensor is located upstream of the second back pressure regulating valve.

[0023] Optionally, the high-voltage testing device for the solid oxide fuel cell further comprises a signal acquisition and control module, and the signal acquisition and control module is communicatively connected with the heating furnace module and the gas supply and pressure control module respectively.

[0024] According to the second aspect of the present application, a control method for a high-voltage test device for a solid oxide fuel cell is also provided, which is applied to the high-voltage test device for a solid oxide fuel cell according to any technical solution in the first aspect of the present application, comprising the following steps:

[0025] Step S1: The heating furnace module is powered on for preheating until the temperature in the test cavity reaches a set temperature;

[0026] Step S2: Start the gas supply and pressure control module to supply air and fuel gas to the solid oxide fuel cell, and at the same time, supply nitrogen to the test chamber and the containing chamber, so that the corresponding gas pressure gradually reaches the set value, and during the gas supply process, ensure that P N2 >PAir >P F And P N2 , P Air and P F The maximum pressure difference is less than or equal to a preset threshold;

[0027] Step S3: Adjust the gas flow, load current and output power required under the target current, and at the same time, ensure P N2 >P Air >P F And P N2 , P Air and P F The maximum pressure difference is less than or equal to a preset threshold;

[0028] Step S4: reducing the current, reducing the amount of supplied gas, and opening the first back pressure regulating valve, the second back pressure regulating valve and the third back pressure regulating valve;

[0029] Step S5: the anode of the battery stack is purged and the heating furnace module is cooled;

[0030] Step S6: The device is turned off.

[0031] Beneficial effects:

[0032] 1. Through the above technical solution, when it is necessary to test the solid oxide fuel cell under a high temperature and high pressure environment, the heating furnace body can be used to provide a high temperature environment for the solid oxide fuel cell. At the same time, the heating furnace body and the gas supply and pressure control module can be used to provide a high pressure environment for the solid oxide fuel cell, so as to realize the test of the solid oxide fuel cell under a high temperature and high pressure environment. Among them, more importantly, the gas supply and pressure control module, the heating furnace body and the containing furnace body of the present application can not only provide a high pressure environment for the solid oxide fuel cell, but also effectively reduce the internal and external pressure difference of the relevant components in the solid oxide fuel cell, thereby effectively avoiding the problems of material damage, structural failure or leakage of the relevant components of the solid oxide fuel cell due to high pressure, and can effectively avoid the test operation risks under the high temperature and high pressure test environment, and improve the safety of the test.

[0033] In addition, the furnace cover provided in the present application is arranged outside the key test position, which can further enhance the safety of the test to a certain extent.

[0034] 2. Other beneficial effects or advantages of the present application will be described in detail in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

[0036] in:

[0037] Figure 1 is a schematic diagram of the structural arrangement of a high-pressure testing device for a solid oxide fuel cell provided by an exemplary embodiment of the present application;

[0038] Figure 2 yes Figure 1 Schematic diagram of the local structure at A in FIG.

[0039] Figure 3 yes Figure 1 Schematic diagram of the local structure at B in FIG.

[0040] Figure 4 yes Figure 1 Schematic diagram of the local structure at C in FIG.

[0041] Figure 5 It is a schematic flow chart of the steps of a control method of a high-voltage test device for a solid oxide fuel cell provided by an exemplary embodiment of the present application.

[0042] Description of the reference numerals in the accompanying drawings:

[0043] 100-solid oxide fuel cell high-voltage test device; 200-solid oxide fuel cell; 1-heating furnace module; 11-containment furnace body; 111-containment cavity; 12-heating furnace body; 121-test cavity; 13-cooling assembly; 131-cooling jacket; 1311-cooling cavity; 132-cooling water pipe; 133-water inlet solenoid valve; 134-cooling water mass flow controller; 135-water outlet pipe; 136-temperature sensor; 2-gas supply and Pressure control module; 21-air supply and pressure control assembly; 211-air supply pipeline; 212-air exhaust pipeline; 213-first back pressure regulating valve; 214-air intake solenoid valve; 215-air mass flow controller; 216-sixth pressure sensor; 217-seventh pressure sensor; 22-fuel gas supply and pressure control assembly; 221-fuel gas supply pipeline; 222-fuel gas exhaust pipeline; 223-second back pressure regulating valve; 224-fuel Gas intake solenoid valve; 225-fuel gas mass flow controller; 226-eighth pressure sensor; 227-ninth pressure sensor; 23-nitrogen supply and pressure control assembly; 231-nitrogen supply pipeline; 2311-main pipeline; 2312-first branch pipe; 2313-second branch pipe; 2314-third branch pipe; 232-nitrogen discharge pipeline; 233-third back pressure regulating valve; 234-nitrogen intake solenoid valve; 2351-first nitrogen mass flow controller; 2 352-second nitrogen mass flow controller; 2361-nitrogen protection intake solenoid valve; 2362-nitrogen pressurization intake solenoid valve; 2371-first pressure sensor; 2372-second pressure sensor; 2373-third pressure sensor; 3-pressure relief assembly; 31-first pressure relief pipe; 32-fourth pressure sensor; 33-first pressure relief valve; 34-second pressure relief pipe; 35-fifth pressure sensor; 36-second pressure relief valve; 4-signal acquisition and control module. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0045] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0046] In addition, the terms "including" and "having" and any variations thereof mentioned in the description of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes other steps or units that are not listed, or optionally includes other steps or units that are inherent to these processes, methods, products or devices. Among them, it should also be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or design solutions. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0047] The technical solution of the present application is described in detail below with reference to the accompanying drawings.

[0048] Example 1

[0049] like Figures 1 to 4 As shown, according to the first aspect of the present application, this embodiment provides a high-pressure test device 100 for a solid oxide fuel cell, comprising a heating furnace module 1 and a gas supply and pressure control module 2. The heating furnace module 1 comprises a accommodating furnace body 11 and a heating furnace body 12, wherein a accommodating cavity 111 for accommodating the heating furnace body 12 is formed in the accommodating furnace body 11, and a test cavity 121 for accommodating the solid oxide fuel cell 200 is formed in the heating furnace body 12.

[0050] The gas supply and pressure control module 2 includes an air supply and pressure control component 21, a fuel gas supply and pressure control component 22, and a nitrogen supply and pressure control component 23; the air supply and pressure control component 21 includes an air supply pipeline 211, an air exhaust pipeline 212, and a first back pressure regulating valve 213, the two ends of the air supply pipeline 211 are respectively used to communicate with the air source and the solid oxide fuel cell 200, the first back pressure regulating valve 213 is arranged on the air exhaust pipeline 212, and the two ends of the air exhaust pipeline 212 are respectively used to communicate with the solid oxide fuel cell 200 and the outside world; the fuel gas supply and pressure control component 22 includes a fuel gas supply pipeline 221, a fuel gas exhaust pipeline 222, and a second back pressure regulating valve 223, the two ends of the fuel gas supply pipeline 221 are respectively used to The second back pressure regulating valve 223 is connected to the fuel gas source and the solid oxide fuel cell 200, and the two ends of the fuel gas discharge pipeline 222 are respectively used to communicate with the solid oxide fuel cell 200 and the outside world; the nitrogen supply and pressure control component 23 includes a nitrogen supply pipeline 231, a nitrogen discharge pipeline 232 and a third back pressure regulating valve 233, one end of the nitrogen supply pipeline 231 is used to communicate with the nitrogen source, and the other end of the nitrogen supply pipeline 231 is respectively extended into the containing cavity 111 and the test cavity 121, the third back pressure regulating valve 233 is arranged on the nitrogen discharge pipeline 232, and one end of the nitrogen discharge pipeline 232 is used to communicate with the outside world, and the other end of the nitrogen discharge pipeline 232 is respectively extended into the containing cavity 111 and the test cavity 121;

[0051] The gas pressure P in the nitrogen supply pipeline 231 is N2 , the gas pressure P in the air supply pipe 211 Air and the gas pressure P in the fuel gas supply pipeline 221 F Satisfaction: P N2 >P Air >P F , and P N2 , P Air and P F The maximum pressure difference is less than or equal to the preset threshold.

[0052] Through the above technical solution, when it is necessary to test the solid oxide fuel cell 200 under a high temperature and high pressure environment, the heating furnace body 12 can be used to provide a high temperature environment for the solid oxide fuel cell 200. At the same time, the heating furnace body 12 and the gas supply and pressure control module 2 can be used to provide a high pressure environment for the solid oxide fuel cell 200, so as to realize the test of the solid oxide fuel cell 200 under a high temperature and high pressure environment. Among them, more importantly, the gas supply and pressure control module 2, the heating furnace body 12 and the containing furnace body 11 of the present application can not only provide a high pressure environment for the solid oxide fuel cell 200, but also effectively reduce the internal and external pressure difference of the relevant components in the solid oxide fuel cell 200, so as to effectively avoid the problems of material damage, structural failure or leakage of the relevant components of the solid oxide fuel cell 200 due to high pressure, and can effectively avoid the test operation risks under the high temperature and high pressure test environment, and improve the safety of the test.

[0053] In addition, the containment furnace body 11 cover provided in the present application is arranged outside the key parts of the test (the heating furnace body 12 and the solid oxide fuel cell 200), which can also further enhance the safety of the test to a certain extent.

[0054] To facilitate understanding by relevant technical personnel, the following describes the principle of how the gas supply and pressure control module 2 of the present application provides a high-pressure test environment for the solid oxide fuel cell 200.

[0055] The gas supply and pressure control module 2 of the present application includes an air supply and pressure control component 21, a fuel gas supply and pressure control component 22, and a nitrogen supply and pressure control component 23. The air supply and pressure control component 21 is used to supply air to the solid oxide fuel cell 200, and the air pressure it supplies is P Air , the P Air The fuel gas supply and pressure control assembly 22 is used to supply fuel gas to the solid oxide fuel cell 200, and the fuel gas pressure supplied is P F , the P F It can be adjusted by the second back pressure regulating valve 223; at the same time, the air and fuel gas directly enter the relevant components of the solid oxide fuel cell 200 to react, and P Air >P F And the maximum pressure difference between the two is less than or equal to the preset threshold.

[0056] In this way, not only can the actual air pressure of the air and fuel gas supplied to the solid oxide fuel cell 200 be adjusted by the first back pressure regulating valve 213 and the second back pressure regulating valve 223 to achieve high pressure environment testing, but also the air pressure can be made greater than the fuel gas pressure by adjusting the first back pressure regulating valve 213 and the second back pressure regulating valve 223 to avoid leakage of the fuel gas inside the solid oxide fuel cell 200.

[0057] At the same time, the nitrogen supply and pressure control assembly 23 is used to supply nitrogen to the test chamber 121, and the nitrogen pressure supplied is P N2 , the P N2 The back pressure can be adjusted by the third back pressure regulating valve 233. That is, the nitrogen supplied is filled outside the solid oxide fuel cell 200, and because P N2 >P Air >P F In this way, the nitrogen it supplies can not only effectively maintain the pressure on the solid oxide fuel cell 200 as a whole to achieve high-pressure environmental testing, but also reduce the internal and external pressure difference of the solid oxide fuel cell 200, thereby effectively avoiding the related components of the solid oxide fuel cell 200 from material damage, structural failure or leakage due to high pressure. At the same time, it can avoid the problem of fuel gas or air leakage, thereby effectively avoiding the test operation risks under high temperature and high pressure test environment and improving the safety of the test.

[0058] In addition, the nitrogen supply and pressure control component 23 provided in the present application is also used to supply nitrogen to the accommodating cavity 111. In this way, the supplied nitrogen can maintain the internal and external pressures of the heating furnace body 12 at an approximate or identical level (i.e., the pressures of the accommodating cavity 111 and the test cavity 121 tend to be consistent), thereby effectively ensuring the normal operation of the heating furnace body 12 and playing a certain protective role for the heating furnace body 12 and the solid oxide fuel cell 200 in the heating furnace body 12.

[0059] In this embodiment, it should be noted that the present application does not specifically limit how to install the solid oxide fuel cell 200 in the test cavity 121, and those skilled in the art can make a reasonable choice based on the existing relevant technology. For example, in an exemplary embodiment, the solid oxide fuel cell 200 can be installed in the test cavity 121 using a clamp.

[0060] It is understood that, first, in this application, P N2 , P Air and P FThe maximum pressure difference can be reasonably selected according to the specific materials of the relevant components of the solid oxide fuel cell 200 and the pressure difference that can be allowed by the structural design, and this application does not make any specific limitation on this.

[0061] Second, in the present application, the outside world is relative to the high-voltage test device 100 for solid oxide fuel cells of the present application, that is, it refers to the outside of the high-voltage test device 100 for solid oxide fuel cells. For example, the fuel gas exhaust pipeline 222 is connected to the outside world, which means that the fuel gas exhaust pipeline 222 can directly lead the fuel gas to the outside atmosphere, or it can lead the fuel gas to other processing or analysis equipment (for example, exhaust gas treatment equipment, exhaust gas analysis equipment, etc.), and the present application does not make specific limitations on this.

[0062] In one embodiment of the present application, the preset threshold of the present application can be set to 20 mbar. This preset threshold is a reference value of a safer maximum pressure difference given by the inventor of the present application after studying the specific materials and structural design of the relevant components of the solid oxide fuel cell 200. It can effectively prevent the relevant components of the solid oxide fuel cell 200 from material damage, structural failure or leakage, etc. on the basis of effectively achieving the smooth testing of the solid oxide fuel cell 200 under a high temperature and high pressure environment.

[0063] In one embodiment of the present application, Figure 1 and Figure 2 As shown, the nitrogen supply pipeline 231 of the present application may include a main pipeline 2311, a first branch pipe 2312, a second branch pipe 2313 and a third branch pipe 2314. One end of the main pipeline 2311 is used to connect with the nitrogen source, and the other end of the main pipeline 2311 is respectively connected with the first branch pipe 2312 and the second branch pipe 2313. The end of the first branch pipe 2312 away from the main pipeline 2311 extends into the accommodating cavity 111, and the end of the second branch pipe 2313 away from the main pipeline 2311 extends into the test cavity 121. One end of the third branch pipe 2314 is connected with the second branch pipe 2313, and the other end of the third branch pipe 2314 is connected to the fuel gas supply pipeline 221 in a disconnectable manner.

[0064] Thus, in the present application, the first branch pipe 2312 and the second branch pipe 2313 thus provided can reliably and safely supply nitrogen to the containing chamber 111 and the testing chamber 121. At the same time, the third branch pipe 2314 thus provided can also be used to purge the pipeline and related components of the solid oxide fuel cell 200 with nitrogen when the test is finished or an emergency occurs, so as to further improve the safety of the testing process.

[0065] In one embodiment of the present application, Figure 1 , Figure 2 as well as Figure 4 As shown, the nitrogen supply and pressure control assembly 23 of the present application may also include a nitrogen intake solenoid valve 234, a first nitrogen mass flow controller 2351, a second nitrogen mass flow controller 2352, a nitrogen protection intake solenoid valve 2361, a nitrogen pressurized intake solenoid valve 2362, a first pressure sensor 2371, a second pressure sensor 2372 and a third pressure sensor 2373; the nitrogen intake solenoid valve 234 is arranged on the main pipeline 2311; the first nitrogen mass flow controller 2351 and the first pressure sensor 2371 are arranged in sequence along the flow direction of nitrogen. On the branch pipe 2312; the second nitrogen mass flow controller 2352, the nitrogen pressurized air intake solenoid valve 2362 and the second pressure sensor 2372 are arranged on the second branch pipe 2313 in sequence along the flow direction of the nitrogen, and the connecting point between the third branch pipe 2314 and the second branch pipe 2313 is located between the second nitrogen mass flow controller 2352 and the nitrogen pressurized air intake solenoid valve 2362; the nitrogen protection air intake solenoid valve 2361 is arranged on the third branch pipe 2314; the third pressure sensor 2373 is arranged on the nitrogen exhaust pipe 232, and is located upstream of the third back pressure regulating valve 233.

[0066] In this embodiment, the nitrogen intake solenoid valve 234 is used to control the on-off and flow rate of the nitrogen supplied by the main pipeline 2311. The first nitrogen mass flow controller 2351 and the second nitrogen mass flow controller 2352 are respectively used to accurately measure the mass flow rate of the nitrogen supplied by the corresponding pipeline, and accurately control the supply flow rate of the nitrogen. The nitrogen protection intake solenoid valve 2361 is used to control the on-off and flow rate of the nitrogen supplied by the third branch pipe 2314, so as to facilitate nitrogen purging. The nitrogen pressurization intake solenoid valve 2362 is used to control the on-off and flow rate of the nitrogen supplied by the second branch pipe 2313. The first pressure sensor 2371, the second pressure sensor 2372 and the third pressure sensor 2373 are respectively used to measure the pressure of the nitrogen supplied by the corresponding pipeline.

[0067] In one embodiment of the present application, Figure 1 and Figure 3As shown, the high-pressure testing device 100 of the solid oxide fuel cell of the present application may also include a pressure relief assembly 3, which includes a first pressure relief pipe 31, a fourth pressure sensor 32, a first pressure relief valve 33, a second pressure relief pipe 34, a fifth pressure sensor 35 and a second pressure relief valve 36. The two ends of the first pressure relief pipe 31 are respectively connected to the test cavity 121 and the accommodating cavity 111, the first pressure relief valve 33 and the fourth pressure sensor 32 are both arranged on the first pressure relief pipe 31 and the first pressure relief valve 33 is located downstream of the fourth pressure sensor 32, one end of the second pressure relief pipe 34 is connected to the accommodating cavity 111, and the other end of the second pressure relief pipe 34 is connected to the outside, the second pressure relief valve 36 and the fifth pressure sensor 35 are both arranged on the second pressure relief pipe 34, and the second pressure relief valve 36 is located downstream of the fifth pressure sensor 35.

[0068] In this way, the fourth pressure sensor 32 is used to measure the pressure in the test cavity 121. When the pressure in the test cavity 121 is too high, the pressure can be relieved through the first pressure relief pipe 31 and the first pressure relief valve 33 so as to ensure the safety of the relevant components in the test cavity 121. At the same time, the fifth pressure sensor 35 is used to measure the pressure in the accommodating cavity 111. When the pressure in the accommodating cavity 111 is too high, the pressure can be relieved through the second pressure relief pipe 34 and the second pressure relief valve 36 so as to ensure the safety of the relevant components in the accommodating cavity 111.

[0069] It can be understood that the first pressure relief valve 33 and the second pressure relief valve 36 provided in the present application can be controlled separately, that is, the first pressure relief valve 33 and the second pressure relief valve 36 respectively relieve pressure according to the pressure data in the test cavity 121 and the accommodating cavity 111. The first pressure relief valve 33 and the second pressure relief valve 36 provided in the present application can also be controlled in linkage, that is, when the first pressure relief valve 33 is opened for pressure relief, the second pressure relief valve 36 is opened at the same time, and the pressure relief is performed in linkage. Relevant technicians can select a reasonable pressure relief method according to actual conditions, and the present application does not make specific restrictions on this.

[0070] In one embodiment of the present application, Figure 1 and Figure 3 As shown, the heating furnace module 1 of the present application may also include a cooling component 13, the cooling component 13 includes a cooling jacket 131 and a cooling water pipe 132, the cooling jacket 131 is wrapped around the outside of the furnace body 11, and a cooling cavity 1311 for containing cooling water is formed in the cooling jacket 131, one end of the cooling water pipe 132 extends into the cooling cavity 1311, and the other end of the cooling water pipe 132 is used to connect to a cooling water source.

[0071] In this embodiment, the cooling jacket 131 is provided to cover the outside of the containing furnace body 11 and a cooling cavity 1311 containing cooling water is formed therein, so that the containing furnace body 11 can be effectively and reliably cooled. At the same time, the cooling water pipe 132 provided can replenish the cooling water in the cooling jacket 131.

[0072] In one embodiment of the present application, Figure 1 and Figure 3 As shown, the cooling component 13 of the present application may also include a water inlet solenoid valve 133 and a cooling water mass flow controller 134, the water inlet solenoid valve 133 and the cooling water mass flow controller 134 are respectively arranged on the cooling water pipe 132, and the water inlet solenoid valve 133 is located upstream of the cooling water mass flow controller 134.

[0073] In this embodiment, the water inlet solenoid valve 133 is used to control the on-off of the cooling water, and the cooling water mass flow controller 134 is used to accurately measure and control the flow of the cooling water supplied in the cooling water pipe 132 .

[0074] In one embodiment of the present application, Figure 1 and Figure 3 As shown, the cooling assembly 13 of the present application may also include a water outlet pipe 135 and a temperature sensor 136. One end of the water outlet pipe 135 extends into the cooling cavity 1311. The temperature sensor 136 is arranged on the water outlet pipe 135 to obtain the temperature of the cooling water in the cooling cavity 1311.

[0075] In this embodiment, the water outlet pipe 135 is used to guide the overheated cooling water in the cooling cavity 1311 to ensure the cooling effect. The temperature sensor 136 is used to measure the temperature of the cooling water, so that the cooling water in the cooling cavity 1311 can be guided out after reaching a certain temperature, so as to inject cooling water with a lower temperature, thereby ensuring the cooling effect.

[0076] In one embodiment of the present application, Figure 1 and Figure 2As shown, the air supply and pressure control component 21 of the present application may also include an air intake solenoid valve 214, an air mass flow controller 215, a sixth pressure sensor 216 and a seventh pressure sensor 217, the air intake solenoid valve 214, the air mass flow controller 215 and the sixth pressure sensor 216 are sequentially arranged on the air supply pipe 211 along the flow direction of the air, the seventh pressure sensor 217 is arranged on the air exhaust pipe 212, and the seventh pressure sensor 217 is located upstream of the first back pressure regulating valve 213; and / or, the fuel gas supply and pressure control component 22 also includes a fuel gas intake solenoid valve 224, a fuel gas mass flow controller 225, an eighth pressure sensor 226 and a ninth pressure sensor 227, the fuel gas intake solenoid valve 224, the fuel gas mass flow controller 225 and the eighth pressure sensor 226 are sequentially arranged on the fuel gas supply pipe 221 along the flow direction of the fuel gas, the ninth pressure sensor 227 is arranged on the fuel gas exhaust pipe 222, and the ninth pressure sensor 227 is located upstream of the second back pressure regulating valve 223.

[0077] In this embodiment, the air intake solenoid valve 214 and the fuel gas intake solenoid valve 224 are respectively used to control the on-off of the air supplied by the air supply pipeline 211 and the fuel gas supplied by the fuel gas supply pipeline 221. The air mass flow controller 215 and the fuel gas mass flow controller 225 are respectively used to accurately measure and control the flow of the supplied air and fuel gas. The sixth pressure sensor 216, the seventh pressure sensor 217, the eighth pressure sensor 226 and the ninth pressure sensor 227 are respectively used to measure the pressure data of the air or fuel gas supplied in the corresponding pipeline.

[0078] In one embodiment of the present application, Figure 1 As shown, the high-pressure test device 100 of the solid oxide fuel cell of the present application may also include a signal acquisition and control module 4, which is respectively connected to the heating furnace module 1 and the gas supply and pressure control module 2 in communication. In this way, the signal acquisition and control module 4 can collect relevant data in the heating furnace module 1 and the gas supply and pressure control module 2 in real time, and can send corresponding control instructions to the heating furnace module 1 and the gas supply and pressure control module 2, so as to safely and reliably test the solid oxide fuel cell 200 in a high temperature and high pressure environment.

[0079] According to the second aspect of the present application, Figure 5 As shown, a control method of a high-voltage test device 100 for a solid oxide fuel cell is also provided, which is applied to the high-voltage test device 100 for a solid oxide fuel cell according to any technical solution in the first aspect of the present application, and comprises the following steps:

[0080] Step S1: The heating furnace module 1 is powered on for preheating until the temperature in the test cavity 121 reaches a set temperature.

[0081] In this embodiment, step S1 is one of the test preparation steps to achieve a high temperature environment, wherein it can be understood that the set temperature can be selected according to different fuel gases and different heating furnaces, and the present application does not make specific limitations on this.

[0082] In an exemplary embodiment, the set temperature can be set to be greater than or equal to 600° C. In addition, it is understood that the temperature in the receiving cavity 111 of the present application should not be too high, generally room temperature is appropriate, for example, the temperature in the receiving cavity 111 should not be higher than 55° C.

[0083] Step S2: Start the gas supply and pressure control module 2 to supply air and fuel gas to the solid oxide fuel cell 200, and at the same time, supply nitrogen to the test chamber 121 and the receiving chamber 111, and the corresponding gas pressure gradually reaches the set value, and during the gas supply process, ensure that P N2 >P Air >P F And P N2 , P Air and P F The maximum pressure difference is less than or equal to the preset threshold.

[0084] In this embodiment, step S2 is to establish a high pressure environment to facilitate high temperature and high pressure testing.

[0085] Step S3: Adjust the gas flow, load current and output power required under the target current, and at the same time, ensure P N2 >P Air >P F And P N2 , P Air and P F The maximum pressure difference is less than or equal to the preset threshold.

[0086] Step S4: lowering the current, reducing the amount of supplied gas, and opening the first back pressure regulating valve 213 , the second back pressure regulating valve 223 , and the third back pressure regulating valve 233 .

[0087] In this embodiment, step S3 and step S4 are the test process of the solid oxide fuel cell 200. It is understandable that during the test process, the specific gas supply and current size can be adjusted according to the actual test needs. For example, the gas flow rate, current carrying capacity and output power can be adjusted according to different test subjects. Taking an exemplary embodiment as an example, during the IV curve test, the gas flow rate, current carrying capacity and output power can be gradually increased and then gradually decreased. For another example, during the operating condition test, it can be directly adjusted to the corresponding operating condition according to the actual test needs, without any restrictions on the adjustment order.

[0088] Step S5: the anode of the battery stack is purged and the heating furnace module 1 is cooled down.

[0089] In this embodiment, step S5 is the shutdown preparation, and the anode is purged first to reduce the pressure while ensuring safety. At the same time, the heating furnace module 1 is cooled, so that step S6 can be smoothly connected.

[0090] Step S6: The device is turned off.

[0091] In summary, through the high-pressure test device 100 of the solid oxide fuel cell of the present application and the control method thereof, not only can the high-temperature and high-pressure test of the solid oxide fuel cell 200 be effectively realized, but also the related components of the solid oxide fuel cell 200 can be effectively prevented from material damage, structural failure or leakage due to high pressure, and at the same time, the test operation risks under the high-temperature and high-pressure test environment can be effectively avoided, and the safety of the test can be improved. In other words, the high-pressure test device 100 of the solid oxide fuel cell of the present application can fill the technical gap in the existing related technology for testing the solid oxide fuel cell 200 under high-temperature and high-pressure operating conditions.

[0092] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A high-voltage test device for a solid oxide fuel cell, characterized in that: include: A heating furnace module (1) comprises a accommodating furnace body (11) and a heating furnace body (12), wherein the accommodating furnace body (11) is formed with a accommodating cavity (111) for accommodating the heating furnace body (12), and the heating furnace body (12) is formed with a testing cavity (121) for accommodating a solid oxide fuel cell (200); A gas supply and pressure control module (2), comprising an air supply and pressure control component (21), a fuel gas supply and pressure control component (22) and a nitrogen supply and pressure control component (23); the air supply and pressure control component (21) comprises an air supply pipeline (211), an air exhaust pipeline (212) and a first back pressure regulating valve (213); the two ends of the air supply pipeline (211) are respectively used to communicate with an air source and the solid oxide fuel cell (200); the first back pressure regulating valve (213) is arranged on the air exhaust pipeline (212); and the two ends of the air exhaust pipeline (212) are respectively used to communicate with the solid oxide fuel cell (200) and the outside world; the fuel gas supply and pressure control component (22) comprises a fuel gas supply pipeline (221), a fuel gas exhaust pipeline (222) and a second back pressure regulating valve (223); the two ends of the fuel gas supply pipeline (221) are respectively used to communicate with the fuel gas source The fuel gas discharge pipeline (222) is connected to the solid oxide fuel cell (200), the second back pressure regulating valve (223) is arranged on the fuel gas discharge pipeline (222), and the two ends of the fuel gas discharge pipeline (222) are respectively used to communicate with the solid oxide fuel cell (200) and the outside world; the nitrogen supply and pressure control component (23) comprises a nitrogen supply pipeline (231), a nitrogen discharge pipeline (232) and a third back pressure regulating valve (233), one end of the nitrogen supply pipeline (231) is used to communicate with a nitrogen source, and the other end of the nitrogen supply pipeline (231) extends into the containing cavity (111) and the test cavity (121) respectively, the third back pressure regulating valve (233) is arranged on the nitrogen discharge pipeline (232), and one end of the nitrogen discharge pipeline (232) is used to communicate with the outside world, and the other end of the nitrogen discharge pipeline (232) extends into the containing cavity (111) and the test cavity (121) respectively; The gas pressure P in the nitrogen supply pipeline (231) is N2 , the gas pressure P in the air supply pipe (211) Air and the gas pressure P in the fuel gas supply pipeline (221) F Satisfaction: P N2 >P Air >P F , and P N2 , P Air and P F The maximum pressure difference is less than or equal to the preset threshold.

2. The high-voltage test device for a solid oxide fuel cell according to claim 1, characterized in that: The preset threshold is 20 mbar.

3. The high-voltage test device for a solid oxide fuel cell according to claim 1, characterized in that: The nitrogen supply pipeline (231) comprises a main pipeline (2311), a first branch pipe (2312), a second branch pipe (2313) and a third branch pipe (2314); one end of the main pipeline (2311) is used to communicate with a nitrogen source; the other end of the main pipeline (2311) is respectively connected to the first branch pipe (2312) and the second branch pipe (2313); one end of the first branch pipe (2312) away from the main pipeline (2311) extends into the accommodating cavity (111); one end of the second branch pipe (2313) away from the main pipeline (2311) extends into the testing cavity (121); one end of the third branch pipe (2314) is connected to the second branch pipe (2313); and the other end of the third branch pipe (2314) is connected to the fuel gas supply pipeline (221) in an on-off manner.

4. The high-voltage test device for a solid oxide fuel cell according to claim 3, characterized in that: The nitrogen supply and pressure control assembly (23) further comprises a nitrogen intake solenoid valve (234), a first nitrogen mass flow controller (2351), a second nitrogen mass flow controller (2352), a nitrogen protection intake solenoid valve (2361), a nitrogen pressurization intake solenoid valve (2362), a first pressure sensor (2371), a second pressure sensor (2372) and a third pressure sensor (2373); The nitrogen intake solenoid valve (234) is arranged on the main pipeline (2311); The first nitrogen mass flow controller (2351) and the first pressure sensor (2371) are sequentially arranged on the first branch pipe (2312) along the flow direction of nitrogen; The second nitrogen mass flow controller (2352), the nitrogen pressurizing air intake solenoid valve (2362) and the second pressure sensor (2372) are sequentially arranged on the second branch pipe (2313) along the flow direction of the nitrogen, and the connecting point between the third branch pipe (2314) and the second branch pipe (2313) is located between the second nitrogen mass flow controller (2352) and the nitrogen pressurizing air intake solenoid valve (2362); The nitrogen protection air intake solenoid valve (2361) is arranged on the third branch pipe (2314); The third pressure sensor (2373) is arranged on the nitrogen exhaust pipeline (232) and is located upstream of the third back pressure regulating valve (233).

5. The high-voltage test device for a solid oxide fuel cell according to claim 1, characterized in that: The high-pressure test device for a solid oxide fuel cell further comprises a pressure relief assembly (3), wherein the pressure relief assembly (3) comprises a first pressure relief pipe (31), a fourth pressure sensor (32), a first pressure relief valve (33), a second pressure relief pipe (34), a fifth pressure sensor (35) and a second pressure relief valve (36); both ends of the first pressure relief pipe (31) are respectively connected to the test chamber (121) and the accommodating chamber (111); the first pressure relief valve (33) and the fourth pressure sensor (32) are both arranged on the first pressure relief pipe (31), and the first pressure relief valve (33) is located downstream of the fourth pressure sensor (32); one end of the second pressure relief pipe (34) is connected to the accommodating chamber (111), and the other end of the second pressure relief pipe (34) is connected to the outside; the second pressure relief valve (36) and the fifth pressure sensor (35) are both arranged on the second pressure relief pipe (34), and the second pressure relief valve (36) is located downstream of the fifth pressure sensor (35).

6. The high-voltage test device for a solid oxide fuel cell according to claim 1, characterized in that: The heating furnace module (1) also includes a cooling component (13), the cooling component (13) including a cooling jacket (131) and a cooling water pipe (132), the cooling jacket (131) is wrapped around the outside of the containing furnace body (11), and a cooling cavity (1311) for containing cooling water is formed in the cooling jacket (131), one end of the cooling water pipe (132) extends into the cooling cavity (1311), and the other end of the cooling water pipe (132) is used to communicate with a cooling water source.

7. The high-voltage test device for a solid oxide fuel cell according to claim 6, characterized in that: The cooling assembly (13) further comprises a water inlet solenoid valve (133) and a cooling water mass flow controller (134), wherein the water inlet solenoid valve (133) and the cooling water mass flow controller (134) are respectively arranged on the cooling water pipe (132), and the water inlet solenoid valve (133) is located upstream of the cooling water mass flow controller (134).

8. The high-voltage test device for a solid oxide fuel cell according to claim 1, characterized in that: The air supply and pressure control assembly (21) further comprises an air intake solenoid valve (214), an air mass flow controller (215), a sixth pressure sensor (216) and a seventh pressure sensor (217), wherein the air intake solenoid valve (214), the air mass flow controller (215) and the sixth pressure sensor (216) are sequentially arranged on the air supply pipe (211) along the flow direction of air, and the seventh pressure sensor (217) is arranged on the air discharge pipe (212), and the seventh pressure sensor (217) is located upstream of the first back pressure regulating valve (213); and / or, The fuel gas supply and pressure control component (22) also includes a fuel gas intake solenoid valve (224), a fuel gas mass flow controller (225), an eighth pressure sensor (226) and a ninth pressure sensor (227); the fuel gas intake solenoid valve (224), the fuel gas mass flow controller (225) and the eighth pressure sensor (226) are sequentially arranged on the fuel gas supply pipeline (221) along the flow direction of the fuel gas; the ninth pressure sensor (227) is arranged on the fuel gas exhaust pipeline (222), and the ninth pressure sensor (227) is located upstream of the second back pressure regulating valve (223).

9. The high-voltage test device for a solid oxide fuel cell according to any one of claims 1 to 8, characterized in that: The solid oxide fuel cell high-voltage test device further comprises a signal acquisition and control module (4), and the signal acquisition and control module (4) is respectively communicatively connected with the heating furnace module (1) and the gas supply and pressure control module (2).

10. A control method for a high-voltage test device for a solid oxide fuel cell, characterized in that: A high-voltage testing device for a solid oxide fuel cell according to any one of claims 1 to 9, comprising the following steps: Step S1: the heating furnace module (1) is powered on for preheating until the temperature in the test cavity (12) reaches a set temperature; Step S2: Start the gas supply and pressure control module (2) to supply air and fuel gas to the solid oxide fuel cell (200), and at the same time, supply nitrogen to the test chamber (121) and the receiving chamber (111), so that the corresponding gas pressure gradually reaches the set value, and during the gas supply process, ensure that P N2 >P Air >P F And P N2 , P Air and P F The maximum pressure difference is less than or equal to a preset threshold; Step S3: Adjust the gas flow, load current and output power required under the target current, and at the same time, ensure P N2 >P Air >P F And P N2 , P Air and P F The maximum pressure difference is less than or equal to a preset threshold; Step S4: reducing the current, reducing the amount of supplied gas, and opening the first back pressure regulating valve (213), the second back pressure regulating valve (223) and the third back pressure regulating valve (233); Step S5: the anode of the battery stack is purged and the heating furnace module is cooled; Step S6: The device is turned off.

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